JP5344130B2 - Pointer display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hand display capable of suppressing the deterioration of reception sensitivity caused by a hand as much as possible, while arranging an antenna for receiving a radio signal having a frequency of an ultra-high frequency band or higher on the backside of a dial. <P>SOLUTION: A wrist watch 1 with GPS includes the dial 11; hands 12 such as an hour hand 121, a minute hand 122 and a second hand 123; a GPS antenna 27; and a control unit 40. The GPS antenna 27 which is arranged on the backside of the dial 11 receives a GPS signal. While receiving the GPS signal, the control unit 40 controls so as not to arrange the hands 12 on an arrangement prohibiting domain 114 including a domain on the surface on a position on the opposite side of a domain on the backside facing to the GPS antenna 27 on the dial 11. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a pointer display device that has a function of receiving a radio signal having a frequency of a very high frequency band or higher and displays predetermined information using a pointer.

In recent years, pointer-type electronic devices that receive wireless signals and acquire information superimposed on the wireless signals have been developed. For example, a pointer-type radio timepiece that receives a standard radio wave of 40 kHz or 60 kHz, acquires accurate time data superimposed on the standard radio wave, and corrects the time is known. In this time data, the cumulative number of days, hours, minutes, etc. from January 1 are expressed in binary code, and each bit of the binary code is assigned one of two different width pulses according to the value. In such a pointer-type radio-controlled timepiece, incorrect time correction is performed if time data is misread, and therefore it is required to accurately determine the pulse width of each bit of the binary code. For this reason, Patent Document 1 proposes a pointer-type radio timepiece that drives the drive motor at the pulse non-occurrence timing in the pulse train so that noise generated when driving the drive motor of the pointer is not mixed in the pulse of the binary code. Yes. Patent Document 2 discloses a pointer-type radio timepiece that suppresses deterioration of reception sensitivity due to a metal dial by providing an opening in a metal dial and arranging an antenna in a case behind the opening. Has been proposed.
JP-A-6-258462 JP 2006-189379 A

  On the other hand, in a pointer-type timepiece, the axis of the pointer is usually arranged near the center of the dial, and the pointer rotates 360 ° on the surface of the dial, so that the antenna can be placed anywhere on the back side of the dial. Depending on the reception time, the reception surface of the antenna may overlap the pointer. Since the shielding effect of a metal pointer against a long wave such as a standard radio wave is very small, the arrangement relationship between the antenna and the pointer is not considered in the pointer-type radio timepiece described in Patent Document 1 or Patent Document 2. However, since the shielding effect of the metal pointer is very large for radio signals with frequencies exceeding the ultra-high frequency band, an antenna that receives radio signals with frequencies exceeding the ultra-high frequency band is arranged on the back side of the dial. In such a case, deterioration of reception sensitivity due to the pointer becomes a problem.

  The present invention has been made in view of the above problems, and the reception sensitivity is deteriorated due to the pointer while an antenna for receiving a radio signal having a frequency of a very high frequency band or more is disposed on the back side of the dial. An object of the present invention is to provide a pointer display device that can suppress as much as possible.

  (1) The present invention is a pointer display device that has a function of receiving a radio signal having a frequency of a very high frequency band or higher and displays predetermined information by a pointer, and includes a dial and a surface of the dial. Including at least one pointer that moves and displays the predetermined information; an antenna that is disposed on the back side of the dial plate and that receives the radio signal; and a pointer controller that controls the placement of the pointer; During the reception of the radio signal, the pointer control unit arranges the pointer in a predetermined arrangement prohibition area including an area on the front surface at a position opposite to the area on the back surface facing the antenna of the dial. It is characterized by not.

  The radio signal having a frequency of the ultra high frequency band or higher is a radio signal used for communication by GPS, Bluetooth (Bluetooth), CDMA (Code Division Multiple Access), or the like.

  In the pointer display device of the present invention, the pointer is not placed in the placement prohibited area during reception of the wireless signal. Therefore, according to the pointer control apparatus of the present invention, it is possible to reduce the radio signal shielding effect by the pointer and suppress the degradation of reception sensitivity as much as possible.

  (2) In the pointer display device of the present invention, the pointer control unit prohibits the placement of the pointer before starting reception of the radio signal when at least one of the pointers is placed in the placement prohibited area. You may make it move to the position which is not contained in an area | region.

  (3) In the pointer display device of the present invention, the pointer control unit may stop the pointer at a position that is not included in the placement prohibited area during reception of the wireless signal.

  In the pointer display device of the present invention, the pointer placed in the placement prohibited area before the start of reception moves to the outside of the placement prohibited area and stops, and the pointer that is not placed in the placement prohibited area before the start of reception has its placement. Stop. Therefore, according to the pointer display device of the present invention, since all the pointers are located outside the arrangement prohibited area during reception, it is possible to suppress the deterioration of the reception sensitivity as much as possible.

  (4) In the pointer display device of the present invention, the pointer control unit displays the reception status of the wireless signal on at least one of the pointers at a position not included in the placement prohibited area during reception of the wireless signal. At the same time, the pointers other than the pointer may be stopped.

  The pointer control unit may cause the at least one pointer to display the reception status of the radio signal at a fixed timing, or may display the reception status of the radio signal at an arbitrary timing.

  The reception status of the radio signal displayed by the pointer is the radio signal reception level, the approximate time until the radio signal reception is completed, and the like. When the radio signal is a satellite signal transmitted from a position information satellite, the number of position information satellites captured may be displayed as the radio signal reception status.

  In the pointer display device of the present invention, at least one pointer displays the reception status outside the placement prohibited area, and the other pointers move outside the placement prohibited area if they are placed in the placement prohibited area before the start of reception. If it is not placed in the placement prohibited area before the start of reception, the placement is stopped. Therefore, according to the pointer display device of the present invention, since all the pointers are arranged outside the arrangement prohibited area during reception, it is possible to suppress the deterioration of reception sensitivity as much as possible.

  Further, according to the pointer display device of the present invention, not all the pointers stop during reception, but at least one pointer displays the reception status, so whether or not the user stops the reception process according to the reception status. It is possible to make a more appropriate selection.

  (5) In the pointer display device of the present invention, the pointer control unit displays the reception status of the wireless signal on the pointer at an arbitrary timing during reception of the wireless signal based on an input operation from the outside. You may do it.

  In the pointer display device of the present invention, the reception status is displayed at an arbitrary timing during reception based on an input operation from the outside. Therefore, according to the present invention, it is possible to provide an easier-to-use pointer display device that can display a reception status when a user requests it.

  (6) The pointer display device of the present invention may display time information as the predetermined information by the pointer.

  Since the pointer display device of the present invention functions as a clock, depending on the time immediately before the start of reception, at least one of the hands may be arranged in the arrangement prohibited area. However, according to the pointer display device of the present invention, since all the pointers are arranged outside the arrangement prohibition area during reception, it is possible to suppress deterioration of reception sensitivity as much as possible.

  (7) The pointer display device of the present invention includes an hour hand, a minute hand, and a second hand for displaying the time information as the pointer, and the pointer control unit prohibits the placement during reception of the wireless signal. The reception status of the wireless signal may be displayed on the second hand at a position not included in the area.

  (8) In the pointer display device of the present invention, the pointer control unit may stop the hour hand and the minute hand at a position not included in the placement prohibited area during reception of the wireless signal.

  (9) In the pointer display device of the present invention, the pointer control unit may receive the wireless signal on at least one of the hour hand and the minute hand at a position not included in the placement prohibition area during reception of the wireless signal. May be displayed.

  (10) The pointer display device of the present invention includes, as the pointer, at least one sub information display needle for displaying predetermined sub information, and the pointer control unit is located in the placement prohibited area during reception of the radio signal. The reception status of the radio signal may be displayed on the sub information display needle at a position not included.

  The predetermined sub information is arbitrary information other than the time information displayed by the hour hand, the minute hand, and the second hand. For example, the predetermined sub information may be information such as a day of the week or a second time, and is measured using a stopwatch function. It may be information on the measurement time. For example, the sub information display hand includes a day hand for displaying the day of the week, a 24-hour hand for displaying the second time, a center hand for measuring and displaying 60 seconds, a 12-hour hand for measuring and displaying 12 hours, and a measurement display for 30 minutes. Such as a needle for 30 minutes.

  (11) In the pointer display device of the present invention, the radio signal may be a satellite signal transmitted from a position information satellite.

  (12) In the pointer display device of the present invention, the position information satellite may be a GPS (Global Positioning System) satellite.

  (13) In the pointer display device of the present invention, the placement prohibition region includes a region on the surface at a position opposite to the region on the back surface facing the antenna of the dial, and a peripheral region surrounding the region. May be a region constituted by.

  The peripheral region may be formed with a constant width or may not be formed with a constant width.

  (14) In the pointer display device of the present invention, the antenna has a reception surface facing the dial plate having a square or rectangular shape, and the arrangement prohibition region has a vertical side length of the reception of the antenna. A length obtained by adding the first predetermined value to the length of the vertical side of the surface, and the length of the horizontal side is added to the length of the horizontal side of the receiving surface of the antenna. It may be a square or rectangular region of a specified length.

  The first predetermined value and the second predetermined value may be different values or the same value.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. Also, not all of the configurations described below are essential constituent requirements of the present invention.

1. GPS system 1-1. Outline FIG. 1 is a diagram for explaining an outline of a GPS system.

  The GPS satellite 10 orbits a predetermined orbit above the earth and transmits a navigation message superimposed on a 1.57542 GHz radio wave (L1 wave) to the ground. Hereinafter, the 1.57542 GHz radio wave on which the navigation message is superimposed is referred to as a “GPS signal”.

  Currently, there are about 30 GPS satellites 10, and in order to identify which GPS satellite 10 the GPS signal is transmitted from, each GPS satellite 10 is 1023 chip called C / A code (Coarse / Acquisition Code) A unique pattern of (1 ms period) is superimposed on the GPS signal. The C / A code looks like a random pattern with each chip being either +1 or -1. Therefore, by correlating the GPS signal and the pattern of each C / A code, the C / A code superimposed on the GPS signal can be detected.

  The GPS satellite 10 includes an atomic clock, and the GPS signal includes extremely accurate time information (hereinafter referred to as “GPS time information”) measured by the atomic clock. Further, a slight time error of an atomic clock mounted on each GPS satellite 10 is measured by a control segment on the ground, and the GPS signal includes a time correction parameter for correcting the time error. Therefore, the GPS receiver 9 can receive a GPS signal transmitted from one GPS satellite 10 and correct the internal time to an accurate time using GPS time information and time correction parameters included therein. it can.

  The GPS signal also includes orbit information indicating the position of the GPS satellite 10 on the orbit. The GPS receiver 9 can perform positioning calculation using GPS time information and orbit information. The positioning calculation is performed on the assumption that a certain amount of error is included in the internal time of the GPS receiver 9. That is, in addition to the x, y, and z parameters for specifying the three-dimensional position of the GPS receiver 9, the time error is also an unknown number. For this reason, the GPS receiver 9 generally receives GPS signals transmitted from four or more GPS satellites, and performs positioning calculation using GPS time information and orbit information included therein.

1-2. Navigation Message FIGS. 2A to 2C are diagrams for explaining the configuration of the navigation message.

  As shown in FIG. 2 (A), the navigation message is configured as data with a main frame having a total number of 1500 bits as one unit. The main frame is divided into five sub-frames 1 to 5 each having 300 bits. Data of one subframe is transmitted from each GPS satellite 10 in 6 seconds. Accordingly, data of one main frame is transmitted from each GPS satellite 10 in 30 seconds.

  Subframe 1 includes satellite correction data such as week number data (WN). The week number data is information representing a week including the current GPS time information. The starting point of the GPS time information is January 6, 1980, 00:00:00 in UTC (Coordinated Universal Time), and the week starting on this day is the week number 0. Week number data is updated on a weekly basis.

  The subframes 2 and 3 include ephemeris parameters (detailed orbit information of each GPS satellite 10). Further, the subframes 4 and 5 include almanac parameters (schematic orbit information of all GPS satellites 10).

  Further, subframes 1 to 5 include, from the beginning, a TLM (Telemetry) word storing 30-bit TLM (Telemetry word) data and a HOW word storing 30-bit HOW (hand over word) data. It is.

  Therefore, TLM words and HOW words are transmitted from the GPS device satellite 10 at intervals of 6 seconds, whereas satellite correction data such as week number data, ephemeris parameters, and almanac parameters are transmitted at intervals of 30 seconds.

  As shown in FIG. 2B, the TLM word includes preamble data, a TLM message, a reserved bit, and parity data.

  As shown in FIG. 2C, the HOW word includes time information called TOW (Time of Week, also referred to as “Z count”). In the Z count data, the elapsed time from 0 o'clock every Sunday is displayed in seconds, and it returns to 0 at 0 o'clock on the next Sunday. That is, the Z count data is information in seconds indicated every week from the beginning of the week, and the elapsed time is a number expressed in units of 1.5 seconds. Here, the Z count data indicates time information at which the first bit of the next subframe data is transmitted. For example, the Z count data of subframe 1 indicates time information at which the first bit of subframe 2 is transmitted. The HOW word also includes 3-bit data (ID code) indicating the ID of the subframe. That is, ID codes “001”, “010”, “011”, “100”, and “101” are included in the HOW words of subframes 1 to 5 shown in FIG.

  The GPS receiver 9 can acquire GPS time information by acquiring the week number data included in the subframe 1 and the HOW word (Z count data) included in the subframes 1 to 5. However, if the GPS receiver 9 has previously acquired the week number data and is counting the elapsed time from the time when the week number data was acquired internally, the GPS satellite 9 does not have to acquire the week number data. Current week number data can be obtained. Therefore, if the GPS receiver 9 acquires the Z count data, the current GPS time information can be roughly estimated. For this reason, the GPS receiver 9 normally acquires only Z count data as time information.

  The TLM word, HOW word (Z count data), satellite correction data, ephemeris parameter, almanac parameter, etc. are examples of satellite information in the present invention.

  As the GPS receiver 9, for example, a wristwatch with a GPS device (hereinafter referred to as “GPS wristwatch”) can be considered.

  The GPS satellite 10 is an example of a position information satellite in the present invention. The GPS signal is an example of a radio signal having a frequency equal to or higher than the frequency of the ultra high frequency band in the present invention, and is an example of a satellite signal in the present invention. The GPS wristwatch is an example of a pointer display device according to the present invention, and the GPS wristwatch of this embodiment will be described below.

2. 2. Watch with GPS 2-1. First Embodiment [GPS Watch Structure]
FIG. 3A and FIG. 3B are diagrams for explaining the structure of the GPS wristwatch according to the first embodiment. 3A is a schematic plan view of the GPS wristwatch, and FIG. 3B is a schematic cross-sectional view of the GPS wristwatch.

  As shown in FIG. 3A, the GPS wristwatch 1 of the first embodiment includes a dial 11 and a metal pointer 12. The pointer 12 includes an hour hand 121, a minute hand 122, a second hand 123, and the like, and is driven by a step motor via a gear.

  The GPS wristwatch 1 receives the GPS signal from at least one GPS satellite 10 and manually corrects the internal time information by manually operating the crown 14, the button 15 (A button), and the button 16 (B button). A mode (time measurement mode) and a mode (positioning mode) in which GPS signals from a plurality of GPS satellites 10 are received and positioning calculation is performed and the time difference of the internal time information is corrected can be set. In addition, the GPS wristwatch 1 can periodically (automatically) execute the time measuring mode and the positioning mode.

  For example, when the button 15 (A button) is pressed for several seconds (for example, 3 seconds) or longer, the GPS wristwatch 1 performs time correction processing in the time measurement mode. For example, when the button 16 (B button) is pressed for several seconds (for example, 3 seconds) or more, the GPS wristwatch 1 performs time correction processing (time difference correction processing) in the positioning mode.

  For example, the GPS wristwatch 1 displays the current reception status by the pointer 12 when the button 15 (A button) or the button 16 (B button) is pressed during execution of the time measuring mode or the positioning mode. For example, when the button 15 (A button) is pressed, the second hand 123 moves to the “High” or “Low” position of the dial 11 and displays whether the reception level of the GPS signal is high or low, respectively. Further, for example, when the button 16 (B button) is pressed, the second hand 123 moves to any position of “≦ 10”, “≦ 30”, “≦ 60” of the dial plate 11 and the GPS signal Approximate times until reception ends (10 seconds or less, 30 seconds or less, 60 seconds or less, respectively) are displayed.

  Further, for example, the GPS wristwatch 1 displays the reception result in the previous timekeeping mode by the pointer 12 when the button 15 (A button) is pressed for a short time, and displays the pointer when the button 16 (B button) is pressed for a short time. 12, the reception result in the previous positioning mode is displayed. For example, when the reception is successful, the second hand 123 moves to the “Y” position on the dial 11, and when reception fails, the second hand 123 moves to the “N” position on the dial 11. Further, the GPS wristwatch 1 automatically displays the reception success or the reception failure by moving the second hand 123 to the position “Y” or “N” of the dial 11 at the end of the time measuring mode or the positioning mode. You can also

  Hereinafter, a pointer having a function of displaying the reception status such as the GPS signal reception level and the approximate time until the end of reception like the second hand 123 is referred to as a “reception status display hand”.

  As shown in FIG. 3B, the GPS wristwatch 1 includes an outer case 17 made of a metal such as stainless steel (SUS) or titanium.

  The exterior case 17 is formed in a substantially cylindrical shape, and a surface glass 19 is attached to the opening on the surface side via a bezel 18. A back cover 26 made of metal in a ring shape is attached to the opening on the back side of the outer case 17.

  In the exterior case 17, a movement 13, a solar cell 22, a GPS antenna 27, a battery 24, and the like are arranged.

  The movement 13 includes a step motor and a train wheel 21. The step motor is composed of a motor coil 20, a stator, a rotor, and the like, and drives the pointer 12 via a train wheel 21.

  A circuit board 25 is disposed on the back cover side of the movement 13, and the circuit board 25 is connected to the antenna substrate 23 and the battery 24 via a connector 32.

  The circuit board 25 is provided with a receiving IC 30 including a receiving circuit for processing a GPS signal received by the GPS antenna 27, a control IC 40 for performing step motor drive control, and the like. The reception IC 30 and the control IC 40 are covered with the shield plate 33 and are driven by the power supplied from the battery 24.

  The battery 24 is a rechargeable secondary battery such as a lithium ion battery, and can store the power generated by the solar cell 22. That is, by electrically connecting the electrode of the solar cell 22 and the electrode of the battery 24, the solar cell performs photovoltaic power generation, and the battery 24 is charged. In the present embodiment, a secondary battery such as a lithium ion battery is used as the battery 24, but a power storage body such as a capacitor or a primary battery such as a lithium battery may be used. In addition, the charging method when the secondary battery is provided is not limited to the one that is charged by the photovoltaic power generation method as in the present embodiment, and the charging coil is provided and charging is performed by an electromagnetic induction method from an external charger. It may be.

  The solar cell 22 is disposed such that the light receiving surface (the upper surface in FIG. 3B) faces a part of the surface (back surface) opposite to the time display surface (front surface) of the dial 11, and the surface glass 19 and Photoelectric power is generated by receiving the light that has passed through the dial 11.

  Since the dial 11 is visible from the outside, it is desirable to improve the appearance while transmitting light as much as possible using a material having low transmittance. Therefore, the dial 11 is made of a non-metallic material such as plastic or glass that transmits light.

  The GPS antenna 27 mounted on the antenna substrate 23 is an antenna that receives GPS signals from a plurality of GPS satellites 10, and is realized by a patch antenna, a helical antenna, a chip antenna, an inverted F antenna, or the like. Since the 1.5 GHz band microwave transmitted from the GPS satellite 10 is circularly polarized, the GPS antenna 27 is preferably realized by a patch antenna capable of receiving circularly polarized waves.

  The GPS antenna 27 is disposed on the surface (back side) opposite to the time display surface of the dial plate 11 and receives a GPS signal that has passed through the front glass 19 and the dial plate 11. For example, as shown in FIG. 3 (A), the GPS antenna 27 has a receiving surface (the upper surface in FIG. 3 (B)) facing the back surface at a position between 6 o'clock and 9 o'clock on the time display surface of the dial 11. Are arranged as follows. Therefore, the dial plate 11 and the surface glass 19 are made of a material that transmits radio waves in the 1.5 GHz band, for example, plastic. The bezel 18 is made of ceramic or the like that is less deteriorated in receiving performance than a metal member.

As will be described later, the metal member in the vicinity of the GPS antenna 27 becomes a factor that degrades the reception sensitivity of the GPS antenna 27. Therefore, GPS antenna 27, the distance L ₁ between the solar cells 22 metal electrodes (not shown) is formed is arranged to be equal to or greater than the predetermined value. When the outer case 17 and the movement 13 are made of a metal member, the GPS antenna 27 is arranged such that the distance L ₂ to the outer case 17 and the distance L ₃ to the movement 13 are both equal to or greater than a predetermined value. The

  On the other hand, when the hands 12 such as the hour hand 121, the minute hand 122, and the second hand 123 are made of a metal member, the hands 12 rotate around the center of the dial 11 according to the internal time. If it arrange | positions so that the back surface of the board 11 may be opposed, it is very difficult to always make the distance of a GPS antenna and the pointer | guide 12 into more than predetermined value. Therefore, as will be described later, in the present embodiment, during reception of the GPS signal, the area on the front surface (the reception of the GPS antenna 27 is opposite to the area on the back surface facing the GPS antenna 27 of the dial 11). Control is performed so that the pointer 12 is not disposed in a predetermined region including a surface (a region overlapping the upper surface in FIG. 3B).

[Circuit configuration of GPS wristwatch]
FIG. 4 is a diagram for explaining a circuit configuration of the GPS wristwatch according to the first embodiment.

  The GPS wristwatch 1 includes a GPS device 70, a time display device 80, and a power supply device 90.

[Configuration of GPS device]
The GPS device 70 includes a GPS antenna 27 and a SAW (Surface Acoustic Wave) filter 31. The GPS antenna 27 is an antenna that receives GPS signals from a plurality of GPS satellites 10 as described with reference to FIG. However, since the signal received by the GPS antenna 27 includes unnecessary signals other than the GPS signal, the SAW filter 31 performs a process of extracting the GPS signal from the signal received by the GPS antenna 27. That is, the SAW filter 31 is configured as a band-pass filter that passes a 1.5 GHz band signal.

  The GPS device 70 includes a receiving IC (receiving circuit) 30. The receiving circuit 30 includes an RF (Radio Frequency) unit 50 and a baseband unit 60. As will be described below, when the GPS device 70 is activated, the receiving circuit 30 receives satellite information such as orbit information and GPS time information included in the navigation message from the 1.5 GHz band GPS signal extracted by the SAW filter 31. Process to get.

  The RF unit 50 includes an LNA (Low Noise Amplifier) 51, a mixer 52, a VCO (Voltage Controlled Oscillator) 53, a PLL (Phase Locked Loop) circuit 54, an IF amplifier 55, an IF (Intermediate Frequency) filter 56, an ADC (ADC). (A / D converter) 57 and the like.

  The GPS signal extracted by the SAW filter 31 is amplified by the LNA 51. The GPS signal amplified by the LNA 51 is mixed with the clock signal output from the VCO 53 by the mixer 52 and down-converted to an intermediate frequency band signal. The PLL circuit 54 compares the phase of the clock signal obtained by dividing the output clock signal of the VCO 53 with the reference clock signal, and synchronizes the output clock signal of the VCO 53 with the reference clock signal. As a result, the VCO 53 can output a clock signal with a stable frequency accuracy of the reference clock signal. For example, several MHz can be selected as the intermediate frequency.

  The signal mixed by the mixer 52 is amplified by the IF amplifier 55. Here, by the mixing in the mixer 52, a high-frequency signal of several GHz is generated together with the signal in the intermediate frequency band. Therefore, the IF amplifier 55 amplifies a high frequency signal of several GHz along with the signal in the intermediate frequency band. The IF filter 56 passes the signal in the intermediate frequency band and removes the high frequency signal of several GHz (precisely, attenuates below a predetermined level). The intermediate frequency band signal that has passed through the IF filter 56 is converted into a digital signal by an ADC (A / D converter) 57.

  The baseband unit 60 includes a DSP (Digital Signal Processor) 61, a CPU (Central Processing Unit) 62, an SRAM (Static Random Access Memory) 63, and an RTC (Real Time Clock) 64. The baseband unit 60 is connected to a crystal oscillation circuit with temperature compensation circuit (TCXO: Temperature Compensated Crystal Oscillator) 65, a flash memory 66, and the like.

  A crystal oscillation circuit (TCXO) 65 with a temperature compensation circuit generates a reference clock signal having a substantially constant frequency regardless of the temperature.

  The flash memory 66 stores time difference information. The time difference information is information in which time difference data (such as a correction amount for UTC associated with coordinate values (for example, latitude and longitude)) is defined.

  When the GPS device 70 is activated in the timekeeping mode or the positioning mode, the baseband unit 60 performs a process of demodulating the baseband signal from the digital signal (intermediate frequency band signal) converted by the ADC 57 of the RF unit 50.

  Specifically, when the GPS device 70 is activated in the time measurement mode or the positioning mode, the baseband unit 60 first starts the satellite search process.

  In the satellite search process, the baseband unit 60 generates a local code having the same pattern as each C / A code, and performs a process of mixing the generated local code and the baseband signal.

  The baseband unit 60 adjusts the generation timing of each local code so that the signal level of the signal obtained by the mixing process of each local code and the baseband signal becomes a peak. When the signal level is equal to or higher than the threshold value, the baseband unit 60 determines that the local code is synchronized with the GPS satellite 10 of the local code (that is, captures the GPS satellite 10), and information on the captured GPS satellite 10 (For example, the satellite number of each captured GPS satellite 10 or the number of captured GPS satellites 10) is stored in the SRAM 63.

  In the GPS, a CDMA (Code Division Multiple Access) system is used in which all GPS satellites 10 transmit GPS signals having the same frequency using different C / A codes. Therefore, by detecting the C / A code included in the received GPS signal, the GPS satellite 10 that can be captured can be searched.

  Then, the baseband unit 60 calculates the power (reception level) of the signal obtained by mixing the baseband signal and the local code for each captured GPS satellite 10 and stores it in the SRAM 63.

  The navigation message is demodulated in the signal obtained by mixing the acquired baseband signal of the GPS satellite 10 and the local code. Then, the baseband unit 60 detects preamble data included in the TLM word of each subframe of the navigation message, and acquires satellite information such as orbit information (ephemeris parameter, etc.) and GPS time information included in each subframe. And stored in the SRAM 63. Here, the GPS time information is the week number data (WN) and the Z count data, but may be only the Z count data when the week number data has been acquired previously.

  In the timekeeping mode, the baseband unit 60 may acquire GPS time information of at least one GPS satellite 10.

  On the other hand, in the positioning mode, the baseband unit 60 acquires GPS time information and orbit information of N (for example, four) GPS satellites 10. Then, the baseband unit 60 performs positioning calculation based on the acquired GPS time information and orbit information, and acquires position information (more specifically, the latitude and longitude of the place where the GPS wristwatch 1 is located at the time of reception). To do. Specifically, the position of each GPS satellite 10 is calculated from the acquired orbit information, and the distance from each GPS satellite 10 is calculated from the time difference between the acquired GPS time information and internal information. Then, the position information can be obtained by solving simultaneous equations about the distance between each GPS satellite 10 and the GPS wristwatch 1 whose position information is unknown. Then, the baseband unit 60 refers to the time difference information stored in the flash memory 66 and acquires time difference data associated with the coordinate values (for example, latitude and longitude) of the GPS wristwatch 1 specified by the position information. To do.

  The operation of the baseband unit 60 is synchronized with a reference clock signal output from a crystal oscillation circuit (TCXO) 65 with a temperature compensation circuit. The RTC 64 generates timing for processing GPS signals. The RTC 64 is counted up by the reference clock signal output from the TCXO 65.

[Configuration of time display device]
The time display device 80 includes a control IC (control unit) 40, a drive circuit 44, an LCD drive circuit 45, and a crystal resonator 43.

  The control unit 40 includes a storage unit 41 and an oscillation circuit 42 and performs various controls.

  The storage unit 41 stores internal time information. The internal time information is time information measured inside the GPS wristwatch 1. The internal time information is updated by a reference clock signal generated by the crystal resonator 43 and the oscillation circuit 42. Therefore, even if the power supply to the receiving circuit 30 is stopped, the internal time information can be updated and the hand movement of the hands 12 can be continued.

  The control unit 40 activates the GPS device 70 in the timekeeping mode or the positioning mode by manual operation or automatically at a predetermined timing. When the GPS device 70 is activated in the timekeeping mode, the control unit 40 corrects the internal time information based on the GPS time information acquired by the GPS device 70 and stores it in the storage unit 41. Specifically, the internal time information is corrected to UTC (Coordinated Universal Time) obtained by adding a UTC offset (currently +14 seconds) to the acquired GPS time information. On the other hand, when the GPS device 70 is activated in the positioning mode, the control unit 40 corrects the internal time information based on the GPS time information and the time difference data acquired by the GPS device 70 and stores them in the storage unit 41. That is, the time difference of the internal time information is not corrected in the time measurement mode, but the time difference of the internal time information is corrected in the positioning mode.

  Further, the control unit 40 controls the driving of the pointer 12 via the drive circuit 44. During the activation of the GPS device 70, the control unit 40 performs control so that the pointer 12 is not placed in a region on the front surface that is at a position opposite to the region on the back surface facing the GPS antenna 27 of the dial 11. That is, the control unit 40 functions as a pointer control unit in the present invention.

  Further, the control unit 40 controls driving of a display (not shown) or the like via the LCD drive circuit 45. For example, the control unit 40 may perform control so that the current position is displayed on the display in the positioning mode.

[Configuration of power supply device]
The power supply device 90 includes a solar cell 22, a charge control circuit 28, a battery 24, and a regulator 29.

  The battery 24 supplies driving power to the GPS device 70 and the time display device 80 through the regulator 29.

  The charging control circuit 28 is connected between the solar cell 22 and the battery 24, and electrically connects or disconnects the solar cell 22 and the battery 24 according to a control signal from the control unit 40. When the solar cell 22 and the battery 24 are electrically connected, the current generated by the photovoltaic power generation of the solar cell 22 is supplied to the battery 24 through the charge control circuit 28, and the battery 24 is charged.

[Reception performance of GPS device]
As described above, the GPS device 70 receives a GPS signal that is a radio wave in the 1.5 GHz band, and acquires satellite information such as GPS time information and orbit information.

  FIG. 5 is a diagram showing the characteristic data of the reception sensitivity of the GPS antenna 27. In FIG. 5, the horizontal axis represents the reception level, and the vertical axis represents the average acquisition rate or average acquisition time of the GPS time information.

  According to the characteristic data in FIG. 5, the average acquisition rate hardly changes when the reception level is in the range of −130 dBm to −137 dBm. However, the average acquisition rate gradually decreases as the reception level decreases from the range where the reception level ranges from -137 dBm to -138 dBm, and in the range where the reception level is -138 dBm or less, the average acquisition rate sharply increases as the reception level decreases. descend.

  In addition, the average acquisition time hardly changes when the reception level is in the range of -130 dBm to -135 dBm. However, in the range where the reception level is −135 dBm or less, the average acquisition time increases rapidly as the reception level decreases.

  In other words, in an environment with strong radio waves, such as an outdoor location where there are no tall buildings, the acquisition time and acquisition rate of GPS time information will hardly change even if the reception level decreases slightly. In an environment where the radio wave is weak such as a place hidden behind, the acquisition time and the acquisition rate of GPS time information rapidly deteriorate due to a slight decrease in the reception level. For this reason, it is required to eliminate as much as possible the factors that degrade the reception sensitivity, particularly in an environment with weak radio waves. One of the factors that deteriorate the reception sensitivity is a radio wave shielding effect by a metal member.

  The concept of skin depth is known as an index of the shielding effect. Skin depth refers to the distance at which an electromagnetic field incident on a certain material attenuates to 1 / e. A material with a smaller skin depth is less likely to transmit radio waves. The skin depth d of a conductor with magnetic permeability μ and conductivity σ with respect to a radio wave of frequency f is given by the following equation.

According to the equation (1), the material having a higher conductivity σ has a smaller skin depth d, so it is difficult to transmit radio waves. Therefore, a metal member having a high conductivity σ has a high effect of shielding radio waves. Further, according to the equation (1), the skin depth d decreases as the frequency f of radio waves increases. That is, the influence on the skin depth is particularly great for radio waves having a frequency of the ultra high frequency band or higher. From the above, the shielding effect by the metal member in the vicinity of the GPS antenna 27 greatly acts on a GPS signal that is a radio wave having a frequency of the ultra high frequency band or higher. Therefore, in this embodiment, in order to reduce the shielding effect by the metal member in the vicinity of the GPS antenna 27, as shown in FIG. (Not shown), the distances L ₁ , L ₂ and L ₃ between the movement 13 and the outer case 17 are arranged to be equal to or greater than a predetermined value.

  FIG. 6 is a diagram for explaining the deterioration of reception sensitivity due to the shielding effect of the metal pointer. In FIG. 6, the horizontal axis represents the reception frequency, and the vertical axis represents the reception level. As shown in FIG. 7A, the data indicated by the dotted line in FIG. 6 is a region 110 on the front surface at a position opposite to the region on the back surface of the dial plate 11 facing the GPS antenna 27 (FIG. 7). This is data indicating the reception level of the 1.57542 GHz radio wave when the metal hands 12 such as the hour hand 121, the minute hand 122, and the second hand 123 are not arranged in the rectangular area indicated by the vertical line in FIG. On the other hand, the data indicated by the solid line in FIG. 6 indicates the reception level of the 1.57542 GHz radio wave when the metal pointer 12 such as the hour hand 121 is arranged in the area 110 as shown in FIG. It is the data shown.

  As can be seen from FIG. 6, when the metal pointer 12 is disposed in the area 110, the frequency indicating the maximum reception level of the GPS antenna 27 is higher than when the metal pointer 12 is not disposed in the area 110. The reception level of the 1.57542 GHz radio wave is lowered by about several dBm.

  Referring to FIG. 5, for example, in a reception environment where the reception level of the GPS signal is about −130 dBm, the average acquisition time and acquisition rate of the GPS time information hardly change even if the reception level decreases by about several dBm. However, for example, in a reception environment where the reception level of the GPS signal is only -138 dBm, the average acquisition time of the GPS time information is increased by about 10 seconds and the average acquisition rate is also reduced by about 10% just by reducing the reception level by 1 dBm. To do. Therefore, in an environment where the reception level is low, if a GPS signal is received in a state where the metal pointer 12 is disposed in the area 110, power consumption will increase.

  Furthermore, as shown in FIG. 7B, when the metal pointer 12 such as the minute hand 122 is arranged in the vicinity of the area 110, the reception of the GPS signal from the low elevation angle is considered with respect to the dial plate 11. For radio waves traveling from an oblique direction, the GPS antenna 27 and the metal pointer 12 overlap each other, which is equivalent to the metal pointer 12 being disposed in the area 110. Therefore, as shown in FIG. 8, a region 114 (indicated by a grid-like diagonal line in FIG. 8) composed of the region 110 and the peripheral region 112 (a square-shaped region indicated by a horizontal line in FIG. 8) surrounding the region 110 Rectangular area) must be an area for prohibiting the placement of the pointer during reception of the GPS signal (hereinafter referred to as “placement prohibited area”).

Here, if the vertical and horizontal lengths of the rectangular receiving surface of the GPS antenna 27 facing the dial plate 11 are n and m, the area 110 is a rectangular area having vertical and horizontal lengths of n and m, respectively. The peripheral region 112 is partly formed with a width w ₁ and partly formed with a width w ₂ . Therefore, the arrangement prohibited area 114 has vertical and horizontal lengths of n + 2w ₁ (the length obtained by adding 2w ₁ (the first predetermined value in the present invention) to the length n of the vertical side of the receiving surface of the GPS antenna 27), This is a rectangular area of m + 2w ₂ (the length obtained by adding 2w ₂ (second predetermined value in the present invention) to the length m of the horizontal side of the receiving surface of the GPS antenna 27). Note that w ₁ and w ₂ may be different values or the same value.

  Hereinafter, procedures of time correction processing (time measurement mode) and time difference correction processing (positioning mode) common to the first embodiment and second to fourth embodiments described later will be described. The control unit 40 can be realized by a dedicated circuit to perform various controls of these processes, but by executing a control program stored in the storage unit 41, various controls of these processes are performed. You can also do it. That is, as shown in FIG. 9, the control unit 40 functions as a pointer control unit 40-1, a reception control unit 40-2, and a time information correction unit 40-3 according to a control program, thereby performing time correction processing (time measurement). Mode) and time difference correction processing (positioning mode) may be executed.

[Time correction processing (time measurement mode)]
FIG. 10 is a flowchart illustrating an example of a time correction process (time measurement mode) procedure.

  When the GPS wristwatch 1 is set to the timekeeping mode, the time correction process (timekeeping mode) shown in FIG. 10 is executed.

  When the time correction processing (time measurement mode) is started, the control unit 40 (hand control unit 40-1) reads the internal time information from the storage unit 41 and confirms the current position of the hand 12 (step S10). .

  Next, the control unit 40 (pointer control means 40-1) determines whether or not the pointer 12 is present in the placement prohibition area 114 (step S12).

  When the pointer 12 is in the placement prohibition area 114 (Yes in step S12), the control unit 40 (pointer control means 40-1) moves the pointer 12 to the outside of the placement prohibition area 114 (step S14). .

  Next, the control unit 40 (pointer control means 40-1) stops the pointer 12 (step S16). That is, the pointers 12 inside and outside the prohibited area 114 are stopped outside the prohibited area 114.

  Next, the control unit 40 (pointer control means 40-1) moves the reception status display hand to the reception status display start position outside the placement prohibition area 114 (step S18). In this way, the reception status display needle is moved to the outside of the placement prohibition area 114 regardless of whether it is inside the placement prohibition area 114. Therefore, the pointer 12 to be processed in steps S10, S12, and S14 is You may limit to pointers other than a reception status display hand.

  Next, the control part 40 (reception control means 40-2) starts the GPS apparatus 70, and the reception process of the GPS signal by the GPS apparatus 70 is started (step S20). In addition, since all the hands 12 are arranged outside the placement prohibited area 114 before the start of reception by the processing of steps S10 to S18, the deterioration of reception sensitivity due to the shielding effect of the hands 12 is reduced in the subsequent reception of GPS signals. can do.

  When the GPS device 70 starts receiving a GPS signal, the control unit 40 (hand control unit 40-1) displays the reception status on the reception status display needle until the reception is completed (step S22).

  On the other hand, the GPS device 70 first performs processing for capturing the GPS satellite 10 in the baseband unit 60 after activation.

  When the baseband unit 60 times out without being able to capture the GPS satellite 10 (No in step S24 and Yes in step S26), the reception operation of the GPS device 70 is forcibly terminated (step S40). The control unit 40 (pointer control means 40-1) displays the reception failure result on the reception status display hand (step S42). When the GPS wristwatch 1 is in an environment where reception is not possible, for example, when the GPS wristwatch 1 is indoors, it is very unlikely that the GPS satellite 10 can be captured even if all GPS satellites 10 are searched. If the GPS wristwatch 1 cannot detect the GPS satellite 10 that can be captured even after a predetermined time has elapsed, the GPS wristwatch 1 is forced to end the search for the GPS satellite 10 to reduce unnecessary power consumption. it can.

  On the other hand, when the GPS satellite 10 can be captured before the time-out (Yes in step S24), the baseband unit 60 starts acquiring the GPS time information of the captured GPS satellite 10 (step S28). Specifically, the baseband unit 60 demodulates each captured navigation message from each GPS satellite to acquire Z count data, and stores the acquired Z count data in the SRAM 63.

  When the baseband unit 60 times out without being able to acquire GPS time information (Z count data) of the GPS satellite 10 (No in step S30 and Yes in step S32), the reception operation of the GPS device 70 is forced. (Step S40), the control unit 40 (pointer control means 40-1) displays the reception failure result on the reception status display hand (Step S42). For example, even if all the hands 12 are placed outside the placement prohibition area 114, the GPS signal reception level is low, so that time-out may occur without correctly demodulating GPS time information (Z count data). .

  On the other hand, when the GPS time information (Z count data) of the GPS satellite 10 can be acquired before the time-out (Yes in step S30), the control unit 40 (time information correction means 40-3) is the SRAM 63. GPS time information (Z count data) is read out from the internal time information, and the internal time information stored in the GPS time information storage unit 41 is rewritten to the time specified by the GPS time information (Z count data) (step S34). In this way, the internal time information is corrected.

  Then, the reception operation of the GPS device 70 ends (step S36), and the control unit 40 (guide control means 40-1) displays the result of successful reception on the reception status display hand (step S38).

  Finally, the control unit 40 (pointer control means 40-1) controls the drive circuit 44 to move the pointer 12 to a position where the internal time is displayed and restart time measurement (step S44). That is, when the internal time information is corrected, the control unit 40 (hand control means 40-1) moves the pointer 12 to a position where the corrected internal time information is displayed, and the internal time information is not corrected. Moves the pointer 12 to a position where uncorrected internal time information is displayed.

[Time difference correction processing (positioning mode)]
FIG. 11 is a flowchart illustrating an example of a time difference correction process (positioning mode) procedure. In FIG. 11, the same processes as those in the time correction process (time measurement mode) procedure in FIG. 10 are denoted by the same reference numerals, and the description thereof is simplified.

  When the GPS wristwatch 1 is set to the positioning mode, the time difference correction process (positioning mode) shown in FIG. 11 is executed.

  When the time difference correction process (positioning mode) is started, the control unit 40 (pointer control means 40-1) reads the internal time information from the storage unit 41 and confirms the current position of the pointer 12 (step S10).

  Next, the control unit 40 (pointer control means 40-1) determines whether or not the pointer 12 is present in the placement prohibition area 114 (step S12).

  When the pointer 12 is in the placement prohibition area 114 (Yes in step S12), the control unit 40 (pointer control means 40-1) moves the pointer 12 to the outside of the placement prohibition area 114 (step S14). .

  Next, the control unit 40 (pointer control means 40-1) stops the pointer 12 (step S16).

  Next, the control unit 40 (pointer control means 40-1) moves the reception status display hand to the reception status display start position outside the placement prohibition area 114 (step S18).

  Next, the control part 40 (reception control means 40-2) starts the GPS apparatus 70, and the reception process of the GPS signal by the GPS apparatus 70 is started (step S20). In addition, since all the hands 12 are arranged outside the placement prohibited area 114 before the start of reception by the processing of steps S10 to S18, the deterioration of reception sensitivity due to the shielding effect of the hands 12 is reduced in the subsequent reception of GPS signals. can do.

  When the GPS device 70 starts receiving a GPS signal, the control unit 40 (hand control unit 40-1) displays the reception status on the reception status display needle until the reception is completed (step S22).

  On the other hand, the GPS device 70 first performs processing for capturing the GPS satellite 10 in the baseband unit 60 after activation.

  When the baseband unit 60 times out without being able to capture the GPS satellite 10 (No in step S24 and Yes in step S26), the reception operation of the GPS device 70 is forcibly terminated (step S40). The control unit 40 (pointer control means 40-1) displays the reception failure result on the reception status display hand (step S42).

  On the other hand, when the GPS satellite 10 can be captured before the time-out (Yes in step S14), the baseband unit 60 starts acquiring the GPS time information and orbit information of the captured GPS satellite 10 (step S14). S50). Specifically, the baseband unit 60 demodulates the captured navigation message from each GPS satellite 10 to acquire Z count data and ephemeris parameters, and stores the acquired Z count data and ephemeris parameters in the SRAM 63.

  When the baseband unit 60 times out without acquiring GPS time information (Z count data) and orbit information (ephemeris parameters) of N or more GPS satellites 10 (No in step S52 and Yes in step S54) In the case, the reception operation of the GPS device 70 is forcibly terminated (step S40), and the control unit 40 (guide control means 40-1) displays the reception failure result on the reception status display hand (step S42). Here, in order to specify the three-dimensional position (x, y, z) of the GPS wristwatch 1, x, y, z are three unknowns. Therefore, in order to calculate the three-dimensional position (x, y, z) of the GPS wristwatch 1, GPS time information (Z count data) and orbit information (ephemeris parameters) of three or more GPS satellites 10 are required. It is. Further, in order to improve the positioning accuracy, if the time error between the internal time information of the GPS wristwatch 1 and the GPS time information (Z count data) is also an unknown number, the GPS time information (Z count data) of four or more GPS satellites 10 And trajectory information (ephemeris parameters).

  On the other hand, when GPS time information (Z count data) and orbit information (ephemeris parameter) of N (for example, 4) or more GPS satellites 10 can be acquired before the time-out (Yes in step S52) The baseband unit 60 reads GPS time information (Z count data) and orbit information (ephemeris parameters) of N (for example, four) GPS satellites 10 from the SRAM 36 and starts positioning calculation (step S56).

  As described above, the GPS time information (Z count data) represents the time when the GPS satellite 10 transmits the first bit of the subframe of the navigation message. Accordingly, the baseband unit 60 determines the N (for example, four) GPS satellites 10 and the GPS wristwatch 1 from the time difference between the internal time information and the GPS time information (Z count data) when the first bit of the subframe is received. Can be calculated respectively. Further, the baseband unit 60 can calculate the positions of N (for example, four) GPS satellites 10 using orbit information (ephemeris parameters). Then, the baseband unit 60 uses the pseudo distance between the N (for example, four) GPS satellites 10 and the GPS wristwatch 1 and the positions of the N (for example, four) GPS satellites 10 to determine the GPS wristwatch. 1 position information can be generated. Then, the baseband unit 60 refers to the time difference information stored in the flash memory 66 and acquires time difference data associated with the coordinate values (for example, latitude and longitude) of the GPS wristwatch 1 specified by the position information. The acquired time difference data is stored in the SRAM 63.

  If the baseband unit 60 times out without acquiring time difference data (No in step S58 and Yes in step S60), the reception operation of the GPS device 70 is forcibly terminated (step S30), and control is performed. The unit 40 (pointer control means 40-1) displays the result of reception failure on the reception status display hand (step S42). For example, if the accurate coordinate value of the GPS wristwatch 1 cannot be specified due to low positioning calculation accuracy, there is a possibility that correct time difference data cannot be acquired. For this reason, if the positioning calculation is not terminated until the accuracy of the positioning calculation clears the reference value, it is possible that the time-out data cannot be acquired and time-out occurs because the positioning calculation does not end.

  On the other hand, when the time difference data can be acquired before the time-out (in the case of Yes in step S58), the control unit 40 (time information correcting means 40-3) receives the GPS time information (Z count data) from the SRAM 63 and The time difference data is read, and the internal time information stored in the storage unit 41 is rewritten to the time specified by the GPS time information (Z count data) and the time difference data (step S62).

  Then, the reception operation of the GPS device 70 ends (step S36), and the control unit 40 (guide control means 40-1) displays the result of successful reception on the reception status display hand (step S38).

  Finally, the control unit 40 (pointer control means 40-1) controls the drive circuit 44 to move the pointer 12 to a position where the internal time is displayed and restart time measurement (step S44).

  FIG. 12 is a flowchart illustrating an example of a specific pointer drive control procedure of the first embodiment in the time correction process (positioning mode) shown in FIG. 10 or the time difference correction process (positioning mode) shown in FIG. . In FIG. 12, notation is omitted for a part of the processing of FIG. 10 or FIG. 11 that is not related to the pointer drive control. FIGS. 13A to 13F and FIGS. 14A to 14F are arranged in time series in the first example and the second example of the pointer arrangement in the procedure of FIG. 12, respectively. It is a figure. FIGS. 13A and 14A show the pointer arrangement immediately before the start of reception in the time measurement mode or the positioning mode. The procedure of FIG. 12 will be described below with reference to FIGS. 13 (A) to 13 (F) and FIGS. 14 (A) to 14 (F). In FIG. 12, steps that perform the same processing as the steps in the procedures of FIGS. 10 and 11 are given the same numbers.

  First, the control unit 40 (the hand control unit 40-1) reads the internal time information from the storage unit 41, and positions of the hour hand 121 and the minute hand 122 (for example, positions shown in FIG. 13A or FIG. 14A). (Step S10), and it is determined whether or not the hour hand 121 and the minute hand 122 are present in the placement prohibition area 114 (steps S12-1, S12-2, S12-3).

  When both the hour hand 121 and the minute hand 122 are present in the placement prohibition region 114 (Yes in Step S12-1 and Yes in Step S12-2), the control unit 40 (the pointer control means 40-1) And the minute hand 122 are moved to the outside of the placement prohibition region 114 (step S14-1). As shown in FIG. 13A, in the first example, since a part of the hour hand 121 and a part of the minute hand 122 are in the placement prohibition region 114, the control unit 40 (the pointer control means 40-1) It is determined that there are both the hour hand 121 and the minute hand 122 in the placement prohibition area 114. Then, the control unit 40 (the pointer control means 40-1) moves the hour hand 121 and the minute hand 122 to the outside of the arrangement prohibition region 114, for example, at the shortest distance as shown in FIG.

  When there is only the hour hand 121 in the placement prohibition area 114 (Yes in step S12-1 and No in step S12-2), the control unit 40 (pointer control means 40-1) places the hour hand 121 in the placement prohibition area. It moves outside 114 (step S14-2).

  When there is only the minute hand 122 in the placement prohibition area 114 (No in step S12-1 and Yes in step S12-3), the control unit 40 (pointer control means 40-1) places the minute hand 122 in the placement prohibition area. It moves outside 114 (step S14-3).

  When both the hour hand 121 and the minute hand 122 are not present in the placement prohibition region 114 (No in step S12-1 and No in step S12-3), the control unit 40 (pointer control means 40-1) The minute hand 122 may be left in that position, or may be moved to another position outside the placement prohibition region 14. As shown in FIG. 14A, in the second example, the control unit 40 (pointer control means 40-1) determines that both the hour hand 121 and the hour hand 121 and the minute hand 122 are not in the placement prohibition area 114. Then, the control unit 40 (pointer control means 40-1) stops the hour hand 121 and the minute hand 122 at the positions shown in FIG. 14A as shown in FIG. 14B.

  In the processes of steps S14-1, S14-2, and S14-3, when the hour hand 121 and the minute hand 122 are simultaneously rotated and moved by one motor, the control unit 40 (the pointer control means 40-1) The minute hand 122 is simultaneously moved out of the placement prohibited area. When the hour hand 121 and the minute hand 122 are rotated by separate motors, the control unit 40 (the pointer control means 40-1) separates the hour hand 121 and the minute hand 122 separately from the disposition prohibiting area 114 as necessary. You may make it move to.

  Note that steps S12-1, S12-2, and S12-3 correspond to step S12 in the procedure of FIGS. 10 and 11, and steps S14-1, S14-2, and S14-3 are the same as those in FIGS. This corresponds to step S14 in the procedure.

  When the movement of the hour hand 121 and the minute hand 122 is completed, the control unit 40 (the hand control unit 40-1) stops the hour hand 121 and the minute hand 122 (step S16).

  Next, as shown in FIG. 13 (B) or FIG. 14 (B), the control unit 40 (the pointer control means 40-1) places the second hand 123 on the reception status display start position outside the placement prohibition area 114 (for example, The dial 11 is moved to the 12 o'clock position and stopped (step S18).

  Next, when the GPS device 70 is activated and reception is started (step S20), the control unit 40 (pointer control means 40-1) determines whether or not there is a reception status display operation by the user until reception ends. (Step S22-1).

  If there is a reception status display operation during reception (Yes in step S22-1), the control unit 40 (pointer control means 40-1) displays the reception status by moving the second hand 123 (step S22-). 2). Examples of the reception status displayed by the second hand 123 include the number of GPS satellites 10 captured, the reception level of the GPS satellite 10, the approximate time until the end of reception of the GPS signal, and the like. For example, during reception of a GPS signal, the reception status display type when the button 15 (A button) is pressed may be different from the reception status display type when the button 16 (B button) is pressed. Good. When the button 15 (A button) is pressed during reception of the GPS signal, the control unit 40 (the pointer control means 40-1) sets the second hand 123 to “High” in the first example, as shown in FIG. ”Is displayed to indicate that the reception level is high, and as shown in FIG. 14C, in the second example, the second hand 123 is moved to the position“ Low ”to indicate that the reception level is low. To do. Further, when the button 16 (B button) is pressed during reception of the GPS signal, the control unit 40 (the pointer control means 40-1) moves the second hand 123 in the first example as shown in FIG. It is displayed that the approximate time until the end of reception after moving to the position of “≦ 30” is 30 seconds or less. As shown in FIG. 14D, in the second example, the second hand 123 is set to “≦ 60”. It is displayed that the approximate time from the movement to the position until the end of reception is 60 seconds or less.

  Note that steps S22-1, S22-2, and S22-3 correspond to step S22 in the procedures of FIGS.

  Thereafter, when reception of the GPS signal by the GPS device 70 is completed, the control unit 40 (pointer control means 40-1) moves the second hand 123 to display reception success or reception failure (steps S38 and S42). As shown in FIG. 13E, the control unit 40 (the pointer control means 40-1) moves the second hand 123 to the position “Y” in the first example to display the reception success, and FIG. In the second example, the second hand 123 is moved to the “N” position to display a reception failure as shown in FIG. In FIG. 14E, a part of the second hand 123 is placed on the placement prohibition area 114, but the reception success or failure display by the second hand 123 is performed after the end of reception, and thus does not affect the reception sensitivity.

  Finally, as shown in FIG. 13 (F) or FIG. 14 (F), the control unit 40 (hand control means 40-1) displays the internal time by moving the hour hand 121, the minute hand 122, and the second hand 123, Timekeeping is resumed (step S44). Since the reception is successful in the first example, the time displayed by the hour hand 121, the minute hand 122, and the second hand 123 in FIG. 13F is the corrected internal time, and in the second example, the reception has failed. The time displayed by the hour hand 121, the minute hand 122, and the second hand 123 at 14 (F) is an uncorrected internal time.

[Effect of the first embodiment]
In the first embodiment, if at least one of the hour hand 121 and the minute hand 122 is arranged inside the arrangement prohibition area 114 at a time immediately before the start of reception of the GPS signal, the movement is stopped after moving outside the arrangement prohibition area 114. Further, if both the hour hand 121 and the minute hand 122 are arranged outside the arrangement prohibition area 114 at the time immediately before the start of reception of the GPS signal, the hour hand 121 and the minute hand 122 are stopped as they are. In any case, the hour hand 121 and the minute hand 122 stop outside the placement prohibition area 114 while receiving the GPS signal. Furthermore, even if the second hand 123 is arranged either inside or outside the arrangement prohibition area 114 immediately before the start of reception of the GPS signal, it is prohibited after the movement to the reception status display start position (position at 12 o'clock) before the reception starts. The reception status is displayed outside the area 114.

  Therefore, according to the first embodiment, while the GPS signal is being received, the hour hand 121, the minute hand 122, and the second hand 123 are all disposed outside the placement prohibition area 114, so that the GPS signal shielding effect by the pointer 12 is reduced. Therefore, it is possible to suppress the deterioration of reception sensitivity as much as possible.

  Further, according to the first embodiment, since the second hand 123 displays the reception status during reception, it is possible to more appropriately select whether or not the user stops the reception according to the reception status.

  In the first embodiment, the reception status is displayed at an arbitrary timing by operating the button 15 (A button) and the button 16 (B button) during reception of the GPS signal. Therefore, according to the first embodiment, it is possible to provide a GPS wristwatch that is easier to use and can display the reception status when the user requests it.

  Further, according to the first embodiment, since the reception status is displayed on the second hand 123 having a high rotation speed, the reception status can be displayed more quickly. In addition, since a dedicated guideline for displaying the reception status is unnecessary, an increase in cost can be suppressed.

  Further, according to the first embodiment, since the second hand 123 stops at the reception success display position (position “Y”) or the reception failure display position (position “N”) after the reception is completed, the user can receive data. It is possible to easily determine whether or not the process has been completed and whether or not the time has been corrected.

2-2. Second Embodiment FIG. 15 is a schematic plan view of a GPS wristwatch according to a second embodiment.

  As with the first embodiment, the GPS wristwatch 2 of the second embodiment has a dial 11, hour hand 121, minute hand 122, second hand 123, crown 14, button 15 (A button), button 16 (B button), GPS The antenna 27 and the like are provided, and the time measuring mode and the positioning mode are executed by manual operation or periodically (automatically).

  In the second embodiment, as in the first embodiment, the hour hand 121, the minute hand 122, and the second hand 123 are all arranged outside the arrangement prohibition area 114 during reception of the GPS signal.

  Furthermore, in the second embodiment, unlike the first embodiment, the current reception status is automatically displayed by the hour hand 121, the minute hand 122, and the second hand 123 during reception of the GPS signal in the time measuring mode or the positioning mode.

  Specifically, the hour hand 121 automatically moves to the “High” or “Low” position of the dial 11 during reception of the GPS signal, and displays whether the reception level of the GPS signal is high or low, respectively. The minute hand 122 automatically moves to one of the positions “Under”, “Enough”, and “Full” of the dial 11 during reception of the GPS signal, and the number of GPS satellites 10 captured is a predetermined number (for example, 4). Automatically) whether it is less than a predetermined number, a predetermined number, or more than a predetermined number. The second hand 123 automatically moves to one of the positions of “≦ 10”, “≦ 30”, and “≦ 60” of the dial plate 11 during reception of the GPS signal, and the approximate time until the reception of the GPS signal ( 10 seconds or less, 30 seconds or less, or 60 seconds or less), respectively.

  In the second embodiment, as in the first embodiment, the second hand 123 is moved to the “Y” or “N” position on the dial 11 at the end of the timekeeping mode or the positioning mode, respectively. Success or reception failure is automatically displayed.

  As described above, in the second embodiment, the hour hand 121, the minute hand 122, and the second hand 123 are all reception status display hands.

  The other structures and circuit configurations of the second embodiment are the same as the structures and circuit configurations of the first embodiment shown in FIGS.

  FIG. 16 is a flowchart illustrating an example of a specific pointer drive control procedure of the second embodiment in the time correction process (positioning mode) shown in FIG. 10 or the time difference correction process (positioning mode) shown in FIG. . In FIG. 16, notation is omitted for a part of the processing of FIG. 10 or FIG. 11 that is not related to the pointer drive control. FIGS. 17A to 17F are diagrams in which an example of the pointer arrangement in the procedure of FIG. 16 is arranged in time series. FIG. 17A shows the pointer arrangement immediately before the start of reception in the time measurement mode or the positioning mode. Hereinafter, the procedure of FIG. 16 will be described with reference to FIGS. 17 (A) to 17 (F). In FIG. 16, steps that perform the same processing as the steps in the procedures of FIGS. 10 and 11 are given the same numbers.

  First, as shown in FIG. 17 (B), the control unit 40 (the pointer control means 40-1) receives the reception status display start position outside the disposition prohibition area 114 with the hour hand 121, the minute hand 122, and the second hand 123 as shown in FIG. The position is moved to the position indicated by 17 (B) and stopped (step S18).

  Next, when the GPS device 70 is activated and reception is started (step S20), the control unit 40 (pointer control means 40-1) causes the hour hand 121 and the minute hand according to the change in the reception status until the reception is completed. 122, the second hand 123 is moved to display the reception status (steps S122-1 to S122-7).

  Specifically, the control unit 40 (the pointer control unit 40-1) moves the hour hand 121 when the reception state 1 (for example, the reception level of the GPS satellite 10) changes (Yes in step S122-1). Then, the display of the reception status 1 is updated (step S122-2). Further, the control unit 40 (the pointer control means 40-1) receives the signal by moving the minute hand 122 when the reception status 2 (for example, the number of captured GPS satellites 10) changes (Yes in step S122-3). The display of situation 2 is updated (step S122-4). Further, the control unit 40 (the pointer control unit 40-1) moves the second hand 123 when the reception status 3 (for example, the approximate time until the reception of the GPS signal is completed) changes (in the case of Yes in step S122-5). Thus, the display of the reception status 3 is updated (step S122-6).

  17 (C) and 17 (D) show the pointer arrangement when displaying the reception status. In FIG. 17C, the hour hand 121, the minute hand 122, and the second hand are arranged at the “Low” position, the “Enough” position, and the “≦ 60” position of the dial plate 11, respectively, so that the reception level is low. The GPS satellite capture number is a predetermined number (for example, 4), and the approximate time until the end of reception is 60 seconds or less. In FIG. 17D, the hour hand 121, the minute hand 122, and the second hand are arranged at the “High” position, the “Full” position, and the “≦ 30” position on the dial plate 11, respectively. It indicates that the number is high, the number of GPS satellites captured is a predetermined number (for example, 4) or more, and the approximate time until the end of reception is 30 seconds or less.

  Steps S122-1 to S122-7 correspond to step S22 in the procedures of FIGS.

  Thereafter, when reception of the GPS signal by the GPS device 70 is completed, the control unit 40 (pointer control means 40-1) moves the second hand 123 to display reception success or reception failure (steps S38 and S42). For example, as shown in FIG. 17E, the control unit 40 (pointer control means 40-1) displays the successful reception by moving the second hand 123 to the position “Y”.

  Finally, as shown in FIG. 17 (F), the control unit 40 (hand control means 40-1) moves the hour hand 121, the minute hand 122, and the second hand 123 to display the internal time, and restarts the time measurement (step S44).

[Effects of Second Embodiment]
According to 2nd Embodiment, in addition to the effect similar to 1st Embodiment, there exist the following effects.

  In the first embodiment, the second hand 123 displays a plurality of types of reception statuses, whereas in the second embodiment, the hour hand 121, the minute hand 122, and the second hand 123 simultaneously display different types of reception statuses. Therefore, according to the second embodiment, a plurality of types of reception situations can be recognized at the same time, so that the user can more appropriately select whether or not to cancel the reception process according to the reception situation. .

  In the first embodiment, the reception status display is updated by a manual operation, whereas in the second embodiment, the display is automatically updated every time the reception status changes. Therefore, according to the second embodiment, it is possible to prevent an operation error by the user and to check the reception status in real time.

2-3. Third Embodiment FIG. 18 is a schematic plan view of a GPS wristwatch according to a third embodiment.

  As with the first embodiment, the GPS wristwatch 3 of the third embodiment has a dial 11, hour hand 121, minute hand 122, crown 14, button 15 (A button), button 16 (B button), GPS antenna 27, and the like. And a center needle 222.

  In the third embodiment, a circular small seconds meter 120, a 12-hour meter 200, and a 30-minute meter 210 are provided near the 9 o'clock position, 6 o'clock position, and 3 o'clock position of the dial 11, respectively. A second hand (small second hand) 123, a 12-hour hand 202, and a 30-minute hand 212 are disposed in the small second counter 120, 12-hour counter 200, and 30-minute counter 210, respectively.

  The 12-hour counter 200 measures and displays 12 hours with a 12-hour hand 202. The 30-minute meter 210 measures and displays 30 minutes with the 30-minute hand 212. The center hand 222 measures and displays 60 seconds.

  That is, the GPS wristwatch 3 according to the third embodiment has a stopwatch function that measures elapsed time using the 12-hour hand 202, the 30-minute hand 212, and the center hand 222 in addition to the time display function using the hour hand 121, the minute hand 122, and the second hand 123. It is a wristwatch generally called "chronograph".

  In the third embodiment, as in the first embodiment, the timekeeping mode and the positioning mode are executed manually or periodically (automatically).

  In the third embodiment, the hour hand 121, the minute hand 122, the second hand 123, the 12-hour hand 202, the 30-minute hand 212, and the center hand 222 are all arranged outside the arrangement prohibition area 114 during reception of the GPS signal.

  In the third embodiment, during reception of the GPS signal, the center hand 222 is placed at the “Receiving” position of the dial 11 to indicate that the GPS signal is being received.

  Furthermore, in the third embodiment, the current reception status is automatically displayed by the second hand 123, the 12-hour hand 202, and the 30-minute hand 212 during reception of the GPS signal.

  Specifically, the second hand 123 automatically moves to the “High” or “Low” position of the dial 11 during reception of the GPS signal, and displays whether the reception level of the GPS signal is high or low. The 12-hour hand 202 displays the number of captured GPS satellites 10 by sequentially moving to any position of the 12-hour counter 200 according to the number of captured GPS satellites 10 during reception of the GPS signal. For example, when the number of GPS satellites 10 captured is 1, 2, 3,..., 12, the 12-hour hand 202 is 1 hour, 2 hours, 3 hours,. Move to the position. The 30-minute hand 212 displays the approximate time until the end of reception of the GPS signal by sequentially moving to any position of the 30-minute total 210 according to the approximate time until the end of reception of the GPS signal during reception of the GPS signal. To do. For example, when the approximate time until the reception of the GPS signal is 60 seconds, 50 seconds, 40 seconds, 30 seconds, 20 seconds, 10 seconds, the 30 minute hand 212 is 30 minutes, 210 minutes, 30 minutes, 5 minutes, 10 minutes, Move to 15 minutes, 20 minutes, and 25 minutes.

  In the third embodiment, at the end of the timekeeping mode or the positioning mode, the center hand 222 is moved to the “Y” or “N” position of the dial plate 11 to automatically detect reception success or reception failure, respectively. To display.

  As described above, in the third embodiment, the second hand 123, the 12-hour hand 202, the 30-minute hand 212, and the center hand 222 are reception status display hands, and the hour hand 121 and the minute hand 122 are not reception status display hands.

  In addition, since the other structure and circuit structure of 3rd Embodiment are the same as that of 1st Embodiment shown in FIG.3 (B) and FIG. 4, the description is abbreviate | omitted.

  FIG. 19 is a flowchart showing an example of a specific pointer drive control procedure of the third embodiment in the time correction process (positioning mode) shown in FIG. 10 or the time difference correction process (positioning mode) shown in FIG. . In FIG. 19, notation is omitted for a part of the processing of FIG. 10 or FIG. 11 that is not related to the pointer drive control. 20A to 20F are diagrams in which an example of the pointer arrangement in the procedure of FIG. 19 is arranged in time series. FIG. 20A shows the pointer arrangement immediately before the start of reception in the time measurement mode or the positioning mode. The procedure of FIG. 19 will be described below with reference to FIGS. 20 (A) to 20 (F). In FIG. 19, steps that perform the same processes as the steps in the procedures of FIGS. 10 and 11 are given the same numbers.

  First, the control unit 40 (pointer control means 40-1) reads the internal time information from the storage unit 41 and confirms the positions of the hour hand 121 and the minute hand 122 (for example, the position shown in FIG. 20A) (step S10). ), It is determined whether or not the hour hand 121 and the minute hand 122 are present in the placement prohibition area 114 (steps S212-1, S212-2, S212-3).

  When both the hour hand 121 and the minute hand 122 are present in the placement prohibition area 114 (Yes in Step S212-1 and Yes in Step S212-2), the control unit 40 (the pointer control means 40-1) And the minute hand 122 are moved to the outside of the placement prohibition region 114 (step S214-1). In the example shown in FIG. 20A, since a part of the hour hand 121 and a part of the minute hand 122 are in the placement prohibition area 114, the control unit 40 (pointer control means 40-1) is placed in the placement prohibition area 114. It is determined that both the hour hand 121 and the minute hand 122 are present. Then, the control unit 40 (the pointer control means 40-1) moves the hour hand 121 and the minute hand 122 to the outside of the arrangement prohibition region 114, for example, at the shortest distance as shown in FIG.

  When there is only the hour hand 121 in the placement prohibition area 114 (Yes in step S212-1, and No in step S212-2), the control unit 40 (pointer control means 40-1) places the hour hand 121 in the placement prohibition area. It moves outside 114 (step S214-2).

  When there is only the minute hand 122 in the placement prohibition area 114 (No in step S212-1, and Yes in step S212-3), the control unit 40 (pointer control means 40-1) places the minute hand 122 in the placement prohibition area. It moves outside 114 (step S214-3).

  When both the hour hand 121 and the minute hand 122 are not present in the placement prohibition area 114 (No in step S212-1 and No in step S212-3), the control unit 40 (pointer control means 40-1) The minute hand 122 may be left in that position, or may be moved to another position outside the placement prohibition region 14.

  Steps S212-1, S212-2, and S212-3 correspond to step S12 in the procedure of FIGS. 10 and 11, and steps S214-1, S214-2, and S214-3 are the same as those in FIGS. This corresponds to step S14 in the procedure.

  When the movement of the hour hand 121 and the minute hand 122 is completed, the control unit 40 (the hand control unit 40-1) stops the hour hand 121 and the minute hand 122 (step S16).

  Next, as shown in FIG. 20B, the control unit 40 (the pointer control means 40-1) receives the second hand 123, the 12-hour hand 202, the 30-minute hand 212, and the center hand 222 outside the placement prohibition area 114. It is moved to a status display start position (for example, a position of 60 seconds, a position of 12 hours, a position of 30 minutes, and a position of “Receiving”, respectively) and stops (step S18).

  Next, when the GPS device 70 is activated and reception is started (step S20), the control unit 40 (pointer control means 40-1) causes the second hand 123, the 12-hour hand 202, The reception status is displayed by moving the 30-minute hand 212 (steps S222-1 to S222-7).

  Specifically, the control unit 40 (the pointer control unit 40-1) moves the second hand 123 when the reception status 1 (for example, the reception level of the GPS satellite 10) changes (Yes in step S222-1). Thus, the display of the reception status 1 is updated (step S222-2). Further, the control unit 40 (the pointer control means 40-1) moves the 12-hour hand 202 when the reception status 2 (for example, the number of captured GPS satellites 10) has changed (Yes in step S222-3). The display of the reception status 2 is updated (step S222-4). Furthermore, the control unit 40 (the pointer control means 40-1) moves the 30-minute hand 212 when the reception status 3 (for example, the approximate time until the reception of the GPS signal ends) changes (in the case of Yes in step S222-5). It is moved and the display of the reception status 3 is updated (step S222-6).

  20 (C) and 20 (D) show the pointer arrangement when displaying the reception status. In FIG. 20C, since the second hand 123, the 12-hour hand 202, and the 30-minute hand 212 are arranged at the “Low” position, the 1-hour position, and the 5-minute position, respectively, the reception level is low. It is displayed that the capture number of 1 is 1, and that the approximate time until the end of reception is 50 seconds or less. In FIG. 20D, since the second hand 123, the 12-hour hand 202, and the 30-minute hand 212 are arranged at the “High” position, the 9-hour position, and the 25-minute position, respectively, the reception level is high. It indicates that the number of captured GPS satellites is 9, and that the approximate time until the end of reception is 10 seconds or less.

  Steps S222-1 to S222-7 correspond to step S22 in the procedures of FIGS.

  Thereafter, when the reception of the GPS signal by the GPS device 70 is completed, the control unit 40 (the pointer control unit 40-1) moves the center needle 222 to display the reception success or the reception failure (Steps S38 and S42). For example, as shown in FIG. 20 (E), the control unit 40 (pointer control means 40-1) moves the center needle 222 to the “Y” position and displays a successful reception.

  Finally, as shown in FIG. 20 (F), the control unit 40 (hand control means 40-1) moves the hour hand 121, the minute hand 122, and the second hand 123 to display the internal time, and restarts the time measurement (step S44).

[Effect of the third embodiment]
According to 3rd Embodiment, in addition to the effect similar to 1st Embodiment or 2nd Embodiment, there exist the following effects.

  In the first embodiment or the second embodiment, since the reception status is displayed using a part of the area of the dial 11, the display is in a coarse unit, whereas in the third embodiment, 12 hours. Since all the areas of the total 200 and the 30 minute total 210 are used, the reception status can be displayed in a finer unit.

  Furthermore, according to the third embodiment, since the center hand 222 stops at the reception display position (“Receiving” position) during reception, the user can easily determine that reception is in progress.

2-4. Fourth Embodiment FIG. 21 is a schematic plan view of a GPS wristwatch according to a fourth embodiment.

  As in the first embodiment, the GPS wristwatch 4 of the fourth embodiment includes an hour hand 121, a minute hand 122, a second hand 123, a crown 14, a button 15 (A button), a button 16 (B button), a GPS antenna 27, and the like. I have.

  In the GPS wristwatch 4, a fan-shaped day counter 300 is provided between the 9 o'clock position and the 12 o'clock position of the dial 11, and a circular second clock 310 is provided at the 6 o'clock position of the dial 11. ing. A day hand 302 and a 24-hour hand 312 are disposed in the day counter 300 and the second clock 310, respectively.

  The day of the week total 300 displays the day of the week with the day of the week hand 302. The second clock 310 displays the second time by the 24-hour hand 312.

  That is, the GPS wristwatch 4 of the fourth embodiment has a world display function including a day display function using the day hand 302 and a second time display function using the 24-hour hand 312 in addition to the time display function using the hour hand 121, the minute hand 122, and the second hand 123. It is a wristwatch compatible with time.

  In the fourth embodiment, as in the first embodiment, the time measurement mode and the positioning mode are executed by manual operation or periodically (automatically).

  In the fourth embodiment, the hour hand 121, the minute hand 122, the second hand 123, the day hand 302, and the 24-hour hand 312 are all arranged outside the arrangement prohibition area 114 during reception of the GPS signal.

  In the fourth embodiment, during the reception of the GPS signal, the second hand 123 is moved to the “Receiving” position of the dial 11 to display that the GPS signal is being received.

  Furthermore, in the fourth embodiment, the current reception status is automatically displayed by the day of the week hand 302 and the 24-hour hand 312 during reception of the GPS signal.

  Specifically, the day of the week hand 302 automatically moves to the “High” or “Low” position of the day of the week 300 during reception of the GPS signal, and displays whether the reception level of the GPS signal is high or low, respectively. . The 24-hour hand 312 sequentially shifts to any position from 0 o'clock to 12 o'clock (any position on the right half) of the second clock 310 according to the approximate time until reception of the GPS signal is completed during reception of the GPS signal. By moving, the approximate time until the end of receiving the GPS signal is displayed. For example, when the approximate time until the end of reception of the GPS signal is 60 seconds, 45 seconds, 30 seconds, and 0 seconds, the 24-hour hand 312 is set to 0 o'clock, 3 o'clock, 6 o'clock, 9 o'clock of the second clock 310, respectively. Move to the 12 o'clock position.

  In the fourth embodiment, as in the first embodiment, the second hand 123 is moved to the “Y” or “N” position of the dial 11 at the end of the timekeeping mode or the positioning mode, thereby receiving each of them. Success or reception failure is automatically displayed.

  As described above, in the fourth embodiment, the second hand 123, the day hand 302, and the 24-hour hand 312 are reception status display hands, and the hour hand 121 and the minute hand 122 are not reception status display hands.

  The other structure and circuit configuration of the fourth embodiment are the same as the structure and circuit configuration of the first embodiment shown in FIG. 3B and FIG.

  FIG. 22 is a flowchart showing an example of a specific pointer drive control procedure of the fourth embodiment in the time correction process (positioning mode) shown in FIG. 10 or the time difference correction process (positioning mode) shown in FIG. . In FIG. 22, notation is omitted for a part of the processing of FIG. 10 or FIG. 11 that is not related to the pointer drive control. FIG. 23A to FIG. 23F are diagrams in which examples of the pointer arrangement in the procedure of FIG. 22 are arranged in time series. FIG. 23A shows the pointer arrangement immediately before the start of reception in the time measurement mode or the positioning mode. The procedure of FIG. 22 will be described below with reference to FIGS. 23 (A) to 23 (F). In FIG. 22, steps that perform the same processing as the steps in the procedures of FIGS. 10 and 11 are given the same numbers.

  First, the control unit 40 (the hand control unit 40-1) reads the internal time information from the storage unit 41 and confirms the positions of the hour hand 121 and the minute hand 122 (for example, the position shown in FIG. 23A) (step S10). ), It is determined whether or not the hour hand 121 and the minute hand 122 are present in the placement prohibition area 114 (steps S312-1, S312-2, S312-3).

  When both the hour hand 121 and the minute hand 122 are present in the placement prohibition area 114 (Yes in step S312-1 and Yes in step S312-2), the control unit 40 (the pointer control means 40-1) And the minute hand 122 are moved to the outside of the placement prohibition area 114 (step S314-1).

  When only the hour hand 121 is present in the placement prohibition area 114 (Yes in step S312-1 and No in step S312-2), the control unit 40 (pointer control means 40-1) places the hour hand 121 in the placement prohibition area. It moves outside 114 (step S314-2). In the example shown in FIG. 23A, a part of the hour hand 121 is in the placement prohibition area 114, but the minute hand 122 is not in the placement prohibition area 114, so the control unit 40 (pointer control means 40-1) Then, it is determined that only the hour hand 121 is present in the arrangement prohibition area 114. Then, as shown in FIG. 23 (B), the control unit 40 (the pointer control means 40-1) moves the hour hand 121 to the outside of the placement prohibition area 114, for example, at the shortest distance, and the minute hand is shown in FIG. 23 (A). Do not move in position.

  When there is only the minute hand 122 in the placement prohibition area 114 (No in step S312-1 and Yes in step S312-3), the control unit 40 (pointer control means 40-1) places the minute hand 122 in the placement prohibition area. It moves outside 114 (step S314-3).

  When both the hour hand 121 and the minute hand 122 are not present in the placement prohibition area 114 (No in step S312-1 and No in step S312-3), the control unit 40 (pointer control means 40-1) The minute hand 122 may be left in that position, or may be moved to another position outside the placement prohibition region 14.

  Note that steps S312-1, S312-2, and S312-3 correspond to step S12 in the procedure of FIGS. 10 and 11, and steps S314-1, S314-2, and S314-3 are the same as those in FIGS. This corresponds to step S14 in the procedure.

  When the movement of the hour hand 121 and the minute hand 122 is completed, the control unit 40 (the hand control unit 40-1) stops the hour hand 121 and the minute hand 122 (step S16).

  Next, as shown in FIG. 23B, the control unit 40 (the hand control unit 40-1) places the second hand 123, the day hand 302, and the 24-hour hand 312 in the reception status display start position outside the arrangement prohibition area 114. (For example, it moves to the position of “Receiving”, the position of T (the initial of Tuesday), and the position of 0 o'clock) and stops (step S18).

  Next, when the GPS device 70 is activated and reception is started (step S20), the control unit 40 (hand control unit 40-1) causes the day of the week hand 302 and the 24-hour hand 312 according to the change in the reception status. To display the reception status (steps S322-1 to S322-5).

  Specifically, when the reception status 1 (for example, the reception level of the GPS satellite 10) changes (in the case of Yes in step S322-1), the control unit 40 (the pointer control means 40-1) moves the day of the week hand 302. It is moved and the display of the reception status 1 is updated (step S322-2). Further, the control unit 40 (the pointer control unit 40-1) determines that the reception status 2 (for example, the approximate time until the reception of the GPS signal is completed) changes (in the case of Yes in step S322-3), the 24-hour hand 312. To update the display of the reception status 3 (step S322-4).

  FIG. 23C and FIG. 23D show the pointer arrangement when displaying the reception status. In FIG. 23C, since the day hand 302 and the 24-hour hand 312 are arranged at the “Low” position and the 3 o'clock position, respectively, the reception level is low and the approximate time until the end of reception is 45 seconds. It is displayed. In FIG. 23D, since the day hand 302 and the 24-hour hand 312 are arranged at the “High” position and the 9 o'clock position, respectively, the reception level is high and the approximate time until the end of reception is 15 times. The seconds are displayed.

  Note that steps S322-1 to S322-5 correspond to step S22 in the procedures of FIGS.

  Thereafter, when reception of the GPS signal by the GPS device 70 is completed, the control unit 40 (pointer control means 40-1) moves the second hand 123 to display reception success or reception failure (steps S38 and S42). For example, as shown in FIG. 23 (E), the control unit 40 (the pointer control means 40-1) moves the second hand 123 to the “Y” position and displays a successful reception.

  Finally, as shown in FIG. 23 (F), the control unit 40 (hand control means 40-1) moves the hour hand 121, the minute hand 122, and the second hand 123 to display the internal time, and restarts time measurement (step S44). As shown in FIG. 23 (F), the control unit 40 (the hand control unit 40-1) also moves the 24-hour hand 312 and the day of the week hand 302 to restart the second time and the day of the week, respectively.

[Effect of Fourth Embodiment]
According to 4th Embodiment, in addition to the effect similar to 1st Embodiment or 2nd Embodiment, there exist the following effects.

  In the first embodiment or the second embodiment, since the reception status is displayed using a part of the area of the dial 11, the display is in a coarse unit. In the fourth embodiment, the day of the week is displayed. Since many areas of 300 and the second timepiece 310 are used, the reception status can be displayed in finer units.

  Furthermore, according to the fourth embodiment, since the second hand 123 stops at the reception display position (the “Receiving” position) during reception, the user can easily determine that reception is in progress.

  In addition, this invention is not limited to this embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention.

  For example, in the first embodiment, the latest reception status is displayed at the timing of manual operation, but the reception status display is automatically updated every time the reception status changes. May be.

  Also, for example, in the second to fourth embodiments, the reception status display is automatically updated every time the reception status changes, but the latest reception status is displayed at the timing of manual operation. You may comprise.

  Also, for example, in the first to fourth embodiments, it is configured so that either the automatic display function of the reception status or the manual display function can be selected by manually operating the crown 14, the button 15, the button 16, and the like. Alternatively, it may be configured such that at least one of the reception status automatic display function and the manual display function can be stopped by manually operating the crown 14, the button 15, the button 16, and the like.

  For example, each of the above-described embodiments has been described by taking a GPS wristwatch as an example. However, the pointer display device of the present invention is not limited to a GPS wristwatch, and may be another type of pointer display device. As another type of pointer display device, for example, a pointer display device that communicates with a mobile phone, a base station, or the like by Bluetooth, CDMA, or the like can be considered.

  The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. Further, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

The figure for demonstrating the outline | summary of a GPS system. The figure for demonstrating the structure of a navigation message. The figure for demonstrating the structure of the wristwatch with GPS of 1st Embodiment. The figure for demonstrating the circuit structure of the wristwatch with GPS of 1st Embodiment. The figure which shows the characteristic data of the reception sensitivity of the GPS antenna 27. The figure for demonstrating degradation of the receiving sensitivity by the shield effect of metal pointers. The figure for demonstrating degradation of the receiving sensitivity by the shield effect of metal pointers. The figure for demonstrating the arrangement | positioning prohibition area | region of a pointer | guide. The figure for demonstrating the structure of a control part. The flowchart which shows an example of a time correction process sequence. The flowchart which shows an example of a time difference correction process sequence. The flowchart which shows an example of the procedure of the pointer drive control of 1st Embodiment. The figure which shows the 1st example of the pointer arrangement | positioning of 1st Embodiment. The figure which shows the 2nd example of the pointer arrangement | positioning of 1st Embodiment. The schematic plan view of the wristwatch with GPS of 2nd Embodiment. The flowchart which shows an example of the procedure of the pointer drive control of 2nd Embodiment. The figure which shows the example of the pointer arrangement | positioning of 2nd Embodiment. The schematic top view of the wristwatch with GPS of 3rd Embodiment. The flowchart which shows an example of the procedure of the pointer drive control of 3rd Embodiment. The figure which shows the example of the pointer arrangement | positioning of 3rd Embodiment. The schematic plan view of the wristwatch with GPS of 4th Embodiment. The flowchart which shows an example of the procedure of the pointer drive control of 4th Embodiment. The figure which shows the example of the pointer arrangement | positioning of 4th Embodiment.

Explanation of symbols

1 GPS wristwatch, 2 GPS wristwatch, 3 GPS wristwatch, 4 GPS wristwatch, 9 GPS receiver, 10 GPS satellite, 11 dial, 12 pointer, 13 movement, 14 crown, 15 button, 16 button, 17 exterior Case, 18 Bezel, 19 Surface glass, 20 Motor coil, 22 Solar cell, 24 Battery, 25 Circuit board, 26 Back cover, 27 GPS antenna, 28 Charge control circuit, 29 Regulator, 30 Receiver IC (receiver circuit), 31 SAW filter, 32 connector, 33 shield plate, 40 control IC (control unit), 41 storage unit, 42 oscillation circuit, 43 crystal resonator, 44 drive circuit, 45 LCD drive circuit, 50 RF unit, 51 LNA, 52 mixer 53 VCO, 54 PLL circuit, 55 IF 56 IF filter, 57 ADC (A / D converter), 60 baseband unit, 61 DSP, 62 CPU, 63 SRAM, 64 RTC, 65 crystal oscillation circuit with temperature compensation circuit (TCXO), 66 flash memory, 70 GPS device, 80 time display device, 90 power supply device, 114 disposition prohibited area, 120 subsecond meter, 121 hour hand, 122 minute hand, 123 second hand, 200 12 hour meter, 202 12 hour hand, 210 30 minute meter, 212 30 minute hand , 222 Center hand, 300 Day of the week, 302 Day of the week hand, 310 Second clock, 312 24-hour hand

Claims (15)

A pointer display device having a function of receiving a radio signal having a frequency of a very high frequency band or more and displaying predetermined information by a pointer,
Dial and
At least one pointer that moves over the surface of the dial and displays the predetermined information;
An antenna that is disposed on the back side of the dial and receives the radio signal;
A pointer control unit for controlling the placement of the pointer,
The pointer control unit
During the reception of the radio signal, the pointer is not arranged in a predetermined arrangement prohibition area including an area on the surface at a position opposite to the area on the back surface facing the antenna of the dial , and the A pointer display device that displays at least one of the pointers the reception status of the wireless signal and stops the pointers other than the pointer at a position that is not included in the placement prohibition region . In claim 1 ,
The pointer control unit
A pointer display device that displays a reception status of the wireless signal on the pointer at an arbitrary timing during reception of the wireless signal based on an input operation from the outside. In claim 1 or 2 ,
A pointer display device that displays time information as the predetermined information by the pointer. In claim 3 ,
The pointer includes an hour hand, a minute hand, and a second hand for displaying the time information,
The pointer control unit
A pointer display device that displays the reception status of the radio signal on the second hand at a position not included in the placement prohibition area during reception of the radio signal.   A pointer display device that has a function of receiving a radio signal having a frequency of a very high frequency band or more and displays time information by a pointer,
  Dial,
  An hour hand, a minute hand, and a second hand, which are hands that move on the surface of the dial and display time information,
  An antenna that is disposed on the back side of the dial and receives the radio signal;
  A pointer control unit for controlling the placement of the pointer,
  The pointer control unit
  During the reception of the radio signal, the pointer is not arranged in a predetermined arrangement prohibition area including an area on the surface at a position opposite to the area on the back surface facing the antenna of the dial, and the A pointer display device that displays the reception status of the radio signal on the second hand at a position not included in the placement prohibited area during reception of the radio signal. In claim 4 or 5 ,
The pointer control unit
The pointer display device, wherein the hour hand and the minute hand are stopped at a position not included in the placement prohibition area during reception of the wireless signal. In claim 4 or 5 ,
The pointer control unit
During the reception of the wireless signal, the pointer display device displays the reception status of the wireless signal on at least one of the hour hand and the minute hand at a position not included in the placement prohibition area. In any of claims 3 to 7 ,
As the guide, including at least one sub information display needle for displaying predetermined sub information,
The pointer control unit
A pointer display device that displays the reception status of the radio signal on the sub-information display needle at a position not included in the placement prohibition area during reception of the radio signal.   A pointer display device that has a function of receiving a radio signal having a frequency of a very high frequency band or more and displays time information by a pointer,
  Dial,
  At least one pointer that moves over the surface of the dial and displays time information;
  An antenna that is disposed on the back side of the dial and receives the radio signal;
  A pointer control unit for controlling the placement of the pointer,
  And, as the guide, includes at least one sub information display needle for displaying predetermined sub information,
  The pointer control unit
  During the reception of the radio signal, the pointer is not arranged in a predetermined arrangement prohibition area including an area on the surface at a position opposite to the area on the back surface facing the antenna of the dial, and the A pointer display device characterized in that a reception status of the wireless signal is displayed on the sub-information display needle at a position not included in the placement prohibition region. In any one of Claims 3 thru | or 9 ,
The pointer display device, wherein the wireless signal is a satellite signal transmitted from a position information satellite. In claim 10 ,
The pointer information display device, wherein the position information satellite is a GPS (Global Positioning System) satellite. In any one of Claims 1 thru | or 11 ,
The pointer control unit
When at least one of the pointers is arranged in the placement prohibition area, the pointer is moved to a position not included in the placement prohibition area before starting reception of the radio signal. . In any one of Claims 1 to 12 ,
The pointer control unit
A pointer display device that stops the pointer other than the pointer that displays the reception status of the wireless signal at a position that is not included in the placement prohibition area during reception of the wireless signal. In any one of Claims 1 thru | or 13 .
The placement prohibition area is
A pointer display device comprising: a region on the front surface at a position opposite to a region on the back surface of the dial facing the antenna; and a peripheral region surrounding the region. In any one of Claims 1 thru | or 14 .
The antenna is
The shape of the receiving surface facing the dial is square or rectangular,
The placement prohibition area is
The length of the vertical side is a length obtained by adding a first predetermined value to the length of the vertical side of the reception surface of the antenna, and the length of the horizontal side is the side of the reception surface of the antenna. A pointer display device characterized by being a square or rectangular region having a length obtained by adding a second predetermined value to the length of a side.

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