JP2007243962A - Mobile electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile electronic device wherein data can always be displayed on the whole display region of a color LCD11, without the need for canceling the power-saving mode, when it is attached to a charger 2. <P>SOLUTION: The mobile electronic device comprises the color LCD11 which can be set for switching between the whole area operation mode, which operates all the display regions and a partial area operation mode which operates only a part of display regions; a rechargeable battery 17, serving as the power supply of the color LCD11; and a microcomputer 7. When the mobile electronic device is not attached to the charger 2, the microcomputer 7 sets the color LCD11 as the partial area operation mode, when there is no user operation; and when the mobile electronic device is attached to the charger 2, the microcomputer sets the color LCD11 always as the whole-area operation mode. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a cellular phone including an image display device and a lighting device that receives power from a commercial power source or a built-in secondary battery to illuminate the screen of the image display device.

2. Description of the Related Art Conventionally, mobile phones that are widely used include a plurality of operation keys such as numeric keys, a monochrome LCD (liquid crystal display), and an LCD backlight that illuminates the screen of the LCD. On the LCD, when an operation key is operated, data such as characters input by the operation is displayed, and various data such as date and current time are displayed when waiting for an incoming call.

  The mobile phone has a built-in secondary battery as a power source. Power is supplied from the secondary battery to the LCD to display data on the LCD, and power from the secondary battery to the LCD backlight. The LCD backlight is turned on.

  In the above mobile phone, if the LCD backlight is turned on by constantly supplying power from the secondary battery to the LCD backlight, the battery life of the secondary battery is shortened due to the large power consumption. There is a problem that the standby time is shortened.

  Therefore, in the conventional mobile phone, in order to save power consumption, the LCD backlight is turned on by supplying power from the secondary battery to the LCD backlight only when the operation key is operated or when there is an incoming call. When receiving an incoming call, power supply to the LCD backlight is stopped and the LCD backlight is turned off.

  Even when the LCD backlight is turned off, the data displayed on the monochrome LCD is easy to see.

  In recent years, mobile phones with color LCDs have started to appear on the market, and in the case of mobile phones, as with the above mobile phones with monochrome LCDs, when operating keys are operated or incoming calls are made to save power consumption. The LCD backlight is turned on only when there is an error, and the LCD backlight is turned off when waiting for an incoming call.

  Note that a transflective LCD is used as the color LCD. When the LCD backlight is turned off, it is difficult to see the display on the LCD, but it is rare to see the LCD display when waiting for an incoming call while going out. Therefore, turning off the LCD backlight does not hinder the use of the mobile phone.

  In addition, color LCDs consume more power than monochrome LCDs of the same size, so a power-saving mode that reduces power consumption by driving only part of the LCD display area is available. It is possible to set the power saving mode.

  For example, when the LCD backlight is turned off, in a mobile phone in which four lines of character data are displayed in the entire display area of the LCD as shown in FIG. After the light is extinguished, only the middle two lines of character data among the four lines of character data are displayed in a part of the display area as shown in FIG.

  By the way, the secondary battery built in the mobile phone can be charged by the charger (2) shown in FIG. The charger (2) is provided with a receiving recess (24) for the cellular phone (1), and the cellular phone (1) is provided in the cellular phone (1) by mounting the cellular phone (1) on the charger (2). The charging terminals (15) and (15) and the power supply terminals (23) and (23) provided in the charger (2) come into contact with each other, and the secondary battery of the mobile phone (1) is charged.

  For example, after returning home, the user attaches the mobile phone (1) to the charger (2) in order to charge the secondary battery, and in this state, the date or current displayed on the LCD is used instead of the clock or calendar. You may see the time. In particular, various data such as image data can be displayed on the LCD due to the recent development of image processing technology and communication technology, and the opportunity to view the display on the LCD is increasing.

  However, in the conventional mobile phone (1), the mobile phone (1) is set to the power saving mode while going out, and the mobile phone (1) is attached to the charger (2) in the power saving mode after returning home. In this case, as described above, data is displayed only in a part of the display area of the LCD, and in order to display the data in the entire display area of the LCD, an operation to cancel the power saving mode must be performed, which is troublesome. There was a problem.

  Therefore, an object of the present invention is to set a power saving mode for driving a part of the display area of the image display device when there is no user operation, and to perform the operation of canceling the power saving mode when the battery is attached to the charger. It is an object of the present invention to provide a portable electronic device that can always display data in the entire display area of an image display device.

  Therefore, as a result of intensive studies to solve the above problems, the present inventors have considered the battery life of the secondary battery when the mobile phone is attached to the charger and the secondary battery is charged. In view of the fact that it is not necessary to save power consumption, the present invention has been completed.

A first portable electronic device according to the present invention includes an image display device and a lighting device that illuminates the screen of the image display device by receiving power from a commercial power source or a built-in secondary battery, and is attached to a charger. By doing so, the state is detected and charging of the secondary battery is started. The image display device can be switched between a whole area operation mode in which the entire display area is operated and a partial area operation mode in which only a part of the display area is operated to display a necessary minimum image. Possible, portable electronic devices
Mode switching means for setting the image display device to a partial area operation mode when there is no user operation in a state where it is not attached to the charger, and always setting to the full range operation mode when attached to the charger. It has.

  In the first portable electronic device according to the present invention, the image display device is set to the partial area operation mode when there is no user operation in a state in which the image display device is not attached to the charger. Only a part of the area is driven, and an image is displayed only on a part of the display area. When a user operation is performed, the image display device is set to the entire operation mode, and the entire display region of the image display device is driven to display an image in the entire display region.

  In this way, when there is no user operation, by driving only a part of the display area of the image display device, the power supplied from the secondary battery to the image display device is reduced and the power consumption is reduced. .

  On the other hand, in the state where it is attached to the charger, the image display device is always set to the entire area operation mode, and the entire display area of the image display apparatus is driven to display an image in the entire display area.

  Therefore, even if, for example, the power saving mode is set and the power saving mode is attached to the charger after returning home, an image can be displayed in the entire display area of the image display device without performing an operation to cancel the power saving mode. . At this time, since the electric power obtained from the commercial power source is supplied to the secondary battery and the secondary battery is charged, it is always possible to drive the entire display area of the image display device to achieve the battery life of the secondary battery. Will not be adversely affected.

A second portable electronic device according to the present invention includes an image display device and a lighting device that illuminates the screen of the image display device by receiving power from a commercial power source or a built-in secondary battery, and is attached to a charger. By doing so, the state is detected and charging of the secondary battery is started. The image display device can be switched between a whole area operation mode in which the entire display area is operated and a partial area operation mode in which only a part of the display area is operated to display a necessary minimum image. Possible, portable electronic devices
Means for controlling to reduce the power to be supplied to the lighting device when a user operation is not performed for a certain period of time or longer when the battery charger is not attached to the charger;
Means for setting the image display device in a partial area operation mode when there is no user operation in a state where it is not attached to the charger;
Means for performing control to supply a predetermined amount of electric power to the lighting device at all times in a state in which the charger is mounted;
In a state in which the image display device is attached to the charger, the image display device is always provided with means for setting the entire operation mode.

  In the second portable electronic device according to the present invention, the image display device is set to the partial area operation mode when there is no user operation in a state where it is not attached to the charger, and the display of the image display device is performed. Only a part of the area is driven, and an image is displayed only on a part of the display area. When the user operation is not performed for a certain time or more, the power to be supplied from the secondary battery to the lighting device is set to be small, and the screen brightness of the image display device is lowered. On the other hand, when there is a user operation, the image display device is set to the entire area operation mode, the entire display area of the image display apparatus is driven, and an image is displayed in the entire display area. Is supplied with a large amount of power, and the screen of the image display device is illuminated with sufficient brightness.

  In this way, when there is no user operation, only a part of the display area of the image display device is driven, and the power to be supplied to the lighting device is reduced, thereby saving power consumption.

  On the other hand, in the state where it is attached to the charger, the image display device is always set to the entire area operation mode, and the entire display area of the image display apparatus is driven to display an image in the entire display area. Therefore, even if, for example, the power saving mode is set and the power saving mode is attached to the charger after returning home, an image can be displayed in the entire display area of the image display device without performing an operation to cancel the power saving mode. .

  In addition, the power to be supplied from the commercial power source or the secondary battery to the lighting device is always set to a predetermined magnitude regardless of whether there is a user operation or not, and the image display device The screen is illuminated with sufficient brightness. In this way, since the image display device is always illuminated with sufficient brightness by the illumination device, the display of the image display device is easy to see.

  In the state where it is mounted on the charger, the electric power obtained from the commercial power supply is supplied to the secondary battery and the secondary battery is charged. Therefore, as described above, the entire display of the image display device is always displayed. While driving the area and supplying a large amount of power to the lighting device, the battery life of the secondary battery is not adversely affected.

  Specifically, the illuminating device is configured by arranging a plurality of illuminators, and supplies power to all the plurality of illuminators when a user operation is performed, while being attached to a charger. In such a state, power is supplied to only a part of the plurality of illuminators that are necessary for illuminating the screen of the image display device with the minimum brightness that can be read. Has limiting means.

  In a state where the battery is not attached to the charger, when the user operation is not performed for a predetermined time or more, the brightness of the screen of the image display device is reduced as described above, and when the user operation is performed, the image is displayed. The brightness of the display screen is increased. At this time, in the above specific configuration, power is supplied to all the illuminators constituting the illumination device, and the screen of the image display device is illuminated with sufficient brightness.

  On the other hand, in the state where it is attached to the charger, the lighting device is always turned on as described above to illuminate the screen of the image display device. The screen of the image display device is illuminated with a minimum brightness that allows the user to read the display on the screen.

  In this way, power consumption is reduced by reducing the power to be supplied to the lighting device.

  The portable electronic device according to the present invention can always display data in the entire display area of the image display device without performing the operation of canceling the power saving mode when the portable electronic device is attached to the charger.

  Hereinafter, embodiments of the present invention in a mobile phone will be described in detail with reference to the drawings.

  FIG. 1 shows the configuration of a cellular phone (1) and a charger (2) according to the present invention. The cellular phone (1) includes a telephone circuit (4) including a transmission / reception circuit, a modulation / demodulation circuit, a multiplexing processing circuit for performing CDMA (code division multiple access) processing or TDMA (time division multiple access) processing, a voice processing circuit, and the like. In addition to transmitting the transmission voice input from the microphone (5) as a radio wave from the antenna (3), the reception voice received by the antenna (3) can be emitted from the speaker (6).

  The telephone circuit (4) is connected to a microcomputer (7) comprising a CPU (8), a memory (9), a bus (10), etc., and the operation of the telephone circuit (4) is performed by the microcomputer (7). It is controlled.

  A color LCD (11), an LCD backlight (12), a ringer (13), and operation keys (14) are connected to the bus (10) of the microcomputer (7).

  The color LCD (11) receives the entire area operation command from the microcomputer (7) and drives the entire display area, and receives the partial area operation command and drives a part of the display area.

  Further, the mobile phone (1) is provided with a charging terminal (15), and the charging terminal (15) is connected to a secondary battery (17) serving as a power source via a charging circuit (16).

  A first power supply line (171) and a second power supply line (172) extend from the secondary battery (17), and the color LCD (11) is attached to the tip of the first power supply line (171). On the other hand, the LCD backlight (12) is connected to the tip of the second power supply line (172).

  The second power supply line (172) is provided with a power supply switch (170), and the switch (170) is on / off controlled by the microcomputer (7). When the switch (170) is turned on, power is supplied from the secondary battery (17) to the LCD backlight (12) and the LCD backlight (12) is turned on, whereas the switch (170) is turned on. When turned off, the supply of power from the secondary battery (17) to the LCD backlight (12) is stopped, and the LCD backlight (12) is turned off.

  On the other hand, the charger (2) is supplied with an AC / DC conversion circuit (21) that converts AC 100V power obtained from the commercial power system into direct current, and DC power obtained thereby is supplied to the mobile phone (1). And an output terminal of the power supply circuit (22) is connected to the power supply terminal (23).

  By attaching the cellular phone (1) to the charger (2), the charging terminal (15) of the cellular phone (1) and the power supply terminal (23) of the charger (2) are in contact with each other, and the secondary battery (17) is charged.

  A voltage detection circuit (18) is connected to the charging terminal (15) of the cellular phone (1), and the voltage detection circuit (18) is supplied from the power supply terminal (23) of the charger (2). The presence or absence of a power supply voltage is detected, and the detection result is supplied to the microcomputer (7). Thereby, the operation of the charging circuit (16) is controlled.

  In the cellular phone (1), the LCD backlight (12) is turned on when an operation key is operated or an incoming call is received, and the entire display area of the color LCD (11) is driven as shown in FIG. The data is displayed.

  Thereafter, when the operation with respect to the operation key has not been performed for a predetermined time or longer, the LCD backlight (12) is turned off. However, the data display on the color LCD (11) is continued.

  The mobile phone (1) can be set in the power saving mode. When the power saving mode is set, driving of a part of the display area of the color LCD (11) is stopped. As a result, the minimum necessary data display is performed by the remaining display area as shown in FIG.

  Since the above operation is exactly the same as that of the conventional mobile phone having a color LCD, a specific description is omitted here.

  FIG. 2 shows a control procedure by the microcomputer (7) of the present invention.

  First, in step S1, it is determined whether or not a voltage is applied to the charging terminal (15) based on a signal from the voltage detection circuit (18). If it is determined no, the same determination is repeated in step S1.

  On the other hand, when the mobile phone (1) is attached to the charger (2) and it is determined yes in step S1, the process proceeds to step S2 to determine whether or not the power saving mode is set. .

  If the power saving mode is not set, it is determined no in step S2 and the process proceeds to step S3 to turn on the power supply switch (170). As a result, power is supplied to the LCD backlight (12), and the LCD backlight (12) is turned on.

  Subsequently, in step S4, it is determined whether or not a voltage is applied to the charging terminal (15) in the same manner as in step S1, and if it is determined as YES, the same determination is repeated in step S4.

  Thereafter, when the cellular phone (1) is taken out from the charger (2), it is determined NO in step S4, the process proceeds to step S5, and the power supply switch (170) is turned off. As a result, the supply of power to the LCD backlight (12) is stopped, and the LCD backlight (12) is turned off.

  On the other hand, when the power saving mode is set, it is determined as YES in step S2, and the process proceeds to step S6, where a global operation command is issued to the color LCD (11) and the power supply switch (170). Turn on. As a result, the entire display area of the color LCD (11) is driven to display data in the entire display area, power is supplied to the LCD backlight (12), and the LCD backlight (12) is turned on. It will be.

  Subsequently, in step S7, similarly to step S1, it is determined whether or not a voltage is applied to the charging terminal (15). If it is determined as YES, the same determination is repeated in step S7.

  After that, when the cellular phone (1) is taken out from the charger (2), it is determined NO in step S7, and the process proceeds to step S8, and a partial area operation command is issued to the color LCD (11). Turn off the power supply switch (170). As a result, only a part of the display area of the color LCD (11) is driven and data is displayed only on a part of the display area, and the supply of power to the LCD backlight (12) is stopped. The backlight (12) will be turned off.

  As described above, in the cellular phone (1) according to the present invention, when the power saving mode is not set, the LCD backlight (12) is turned on at the time when the battery (2) is attached to the battery charger (2). When the battery is taken out from the charger (2), the LCD backlight (12) is turned off at that time.

  In this way, when the battery charger (2) is attached, the LCD backlight (12) is always lit, so that the data displayed on the color LCD (11) is easy to see. When the power saving mode is not set, data is always displayed in the entire display area of the color LCD 11 as shown in FIG.

On the other hand, when it is set to the power saving mode, it is attached to the charger (2).
At that time, as shown in FIG. 3, the data is displayed in the entire display area of the color LCD (11), the LCD backlight (12) is turned on, and then removed from the charger (2). As shown in FIG. 4, data is displayed only in a part of the display area of the color LCD (11), and the LCD backlight (12) is turned off.

  In this way, even when the power saving mode is set, if the battery (2) is attached, the data is always displayed in the entire display area of the color LCD (11). There is no need to cancel the mode. In addition, when the battery charger (2) is attached, the LCD backlight (12) is always lit, so that the data displayed on the color LCD (11) is easy to see.

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  For example, the detection that the mobile phone (1) is attached to the charger (2) is not limited to the method of detecting the voltage of the charging terminal (15), but a method of providing a dedicated detection sensor such as a magnetic sensor is also adopted. Is possible.

  In the above embodiment, one LCD backlight (12) is provided. However, when a plurality of LCD backlights are provided and the cellular phone (1) is attached to the charger (2), It is also possible to adopt a configuration in which only a part of the plurality of LCD backlights is turned on.

  In the above embodiment, the LCD backlight (12) is turned off when waiting for an incoming call. However, the present invention is not limited to this, and a structure for reducing the luminance of the LCD backlight (12) is adopted. It is also possible.

It is a block diagram showing the structure of the mobile telephone and charger which concern on this invention. It is a flowchart showing the control procedure by the microcomputer of this invention. It is a figure showing the LCD screen in which data is displayed on the whole display area. It is a figure showing the LCD screen in which data is displayed on a part of display area in power saving mode. It is a perspective view showing the external appearance of a mobile phone and a charger.

Explanation of symbols

(1) Mobile phone
(7) Microcomputer
(11) Color LCD
(12) LCD backlight
(15) Charging terminal
(17) Secondary battery
(170) Power supply switch
(2) Battery charger
(23) Power supply terminal

Claims (3)

An image display device and an illuminating device that illuminates the screen of the image display device with power supplied from a commercial power source or a built-in secondary battery, and a voltage is applied to the charging terminal by being attached to the charger. In portable electronic devices where secondary battery charging begins,
Means for controlling to stop the supply of power to the lighting device when a user operation is not performed for a certain time or more in a state where no voltage is applied to the charging terminal;
When a voltage is applied to the charging terminal, the power obtained from the commercial power source is supplied to the secondary battery, and illumination is performed when a user operation is performed on the lighting device without being attached to the charger. A portable electronic device comprising: means for controlling to always turn on at a brightness lower than the brightness of the device. An image display device and an illuminating device that illuminates the screen of the image display device with power supplied from a commercial power source or a built-in secondary battery, and a voltage is applied to the charging terminal by being attached to the charger. In portable electronic devices where secondary battery charging begins,
Means for performing control to reduce the power to be supplied to the lighting device when a user operation is not performed for a predetermined time or more in a state where no voltage is applied to the charging terminal;
When a voltage is applied to the charging terminal, the power obtained from the commercial power source is supplied to the secondary battery, and illumination is performed when a user operation is performed on the lighting device without being attached to the charger. A portable electronic device comprising: means for controlling to always turn on at a brightness lower than the brightness of the device. The illuminating device is configured by arranging a plurality of illuminators, and supplies power to all the illuminators when a user operation is performed. Power limiting means for supplying power to only a part of the illuminators that are necessary to illuminate the screen of the image display device with a minimum brightness that can be read out of the plurality of illuminators is provided. The portable electronic device according to claim 1 or 2.