EP2370962A1 - An electronic device - Google Patents
An electronic deviceInfo
- Publication number
- EP2370962A1 EP2370962A1 EP09802130A EP09802130A EP2370962A1 EP 2370962 A1 EP2370962 A1 EP 2370962A1 EP 09802130 A EP09802130 A EP 09802130A EP 09802130 A EP09802130 A EP 09802130A EP 2370962 A1 EP2370962 A1 EP 2370962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- period
- stand
- infrared receiver
- electronic device
- infrared
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000004913 activation Effects 0.000 claims abstract description 20
- 238000001994 activation Methods 0.000 claims abstract description 20
- 230000003213 activating effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
Definitions
- the present invention relates to an electronic device wherein the power consumption of its infrared receiver on stand-by is reduced.
- the infrared receiver provides the signals transmitted by means of the remote control of the electronic device to be received by the electronic device.
- the infrared receiver is required to operate also on stand-by.
- the most used approach for reducing the power consumption on stand-by is that the infrared receiver of the device is kept operating under the control of a processor, and all other units are completely turned off. In this situation, reducing the amount of power consumed by the infrared receivers becomes critical.
- a way of reducing the average power consumed by the infrared receivers is to supply the infrared receiver not constantly but periodically by the pulse-width modulation (PWM) - technique.
- PWM pulse-width modulation
- the infrared receiver first detects the presence of a signal. After the signal is detected, the infrared receiver is completely activated. The completely activated infrared receiver decodes the next command received in the signal. If the decoded command is a command that provides the electronic device to leave the stand-by mode, the electronic device leaves the stand-by mode.
- the waiting period between the sequential activation moments of the infrared receiver is configured depending on the period of the command transmitted by the transmitter when any button of the remote control is pressed.
- different remote control protocols which differ according to the modulation of the signal emitted by the transmitter, are used.
- the infrared transmitter starts transmitting the first command. This moment is called the moment to . From the moment t 0 onwards, throughout the period t a ', the infrared transmitter is activated. t a ' is the duration wherein the infrared transmitter is active in a period. The signal that is transmitted throughout the period t a ' is a command. Therefore, the period t a ' is called the "command period". After the period t a ', the infrared transmitter remains passive, that is, stands by throughout a fixed period of time described as t b '.
- the period t b ' is called the "stand-by period" of the infrared transmitter.
- the infrared transmitter is activated again for the period t a ' and retransmits the same command.
- a signal with a different modulation is generated, and the command and stand-by periods of the infrared transmitter differ according to the protocol.
- the infrared receiver is momentarily activated at certain intervals.
- the stand-by period between the sequential moments, in which the infrared receiver is activated, is represented by t c ( Figure 2).
- the period t c in the state of the art is determined according to the principle of detecting definitely the first command of the commands transmitted by the infrared transmitter throughout the period of time wherein the user presses the button of the remote control. Therefore, the stand-by period (t c ) between two sequential activations of the infrared receiver is adjusted such that it will be shorter than the command period (t a ') of the infrared transmitter (t c ⁇ t a ').
- each of the activating series (c, d) which are different from each other according to the moment the button is pressed, of the infrared receiver detects definitely the first command of the commands transmitted by the infrared transmitter (the moment A').
- the infrared receiver is completely activated and the next command is decoded (H') ( Figure 2). If the command is a command that provides the electronic device to leave the stand-by mode, the electronic device leaves the stand-by mode.
- the aim of the present invention is the realization of an electronic device wherein the power consumption of its infrared receiver on stand-by is reduced.
- the electronic device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, is controlled by a remote control comprising an infrared transmitter and comprises an infrared receiver.
- the infrared transmitter of the remote control transmits the same command at least k times throughout the average period wherein a button of the remote control is pressed by the user.
- the stand-by period between two sequential activations of the infrared receiver is determined such that the infrared receiver will detect any and only one of the first k-1 commands out of k commands transmitted by the infrared transmitter throughout the average period wherein a button of the remote control is pressed by the user.
- Figure 2 - is the view of the commands which are transmitted by the infrared transmitter of the remote control throughout the pressing period of a button of the remote control and which repeat, and of different state-of-the-art activating series (c, c1) of the infrared receiver; all of which are illustrated on the time scale.
- Figure 3 - is the view of the activating series on the time scale wherein the first activation of the infrared receiver is before the moment the button is pressed (t 0 ), according to the present invention.
- Figure 4 - is the view of the activating series on the time scale wherein the first activation of the infrared receiver is after the moment the button is pressed (t 0 ), according to the present invention.
- the elements illustrated in the figures are numbered as follows:
- the electronic device (1) comprises an infrared receiver (2) and is controlled by a remote control (3).
- the remote control (3) comprises an infrared transmitter (4) and buttons (5).
- t d Stand-by period between two sequential activations of the infrared receiver (2) on stand-by
- d, dl Activating moments of the infrared receiver (2) activating series which are different from each other and independent of each other, according to the present invention
- k Number of transmissions of the same command by the infrared transmitter (4) throughout the average period wherein a button (5) of the remote control (3) is pressed by the user
- rij j ⁇ s i'th, j'th, ... s'th non-sequential activation of the infrared receiver (2)
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) on stand-by is adjusted by the device producer according to the used remote control (3) protocol.
- the period wherein a button (5) of the remote control (3) is pressed has an average of 300 milliseconds.
- the infrared transmitter (4) of the remote control (3) transmits the command, which makes the electronic device (1) leave the stand-by mode, at least k times throughout the average period wherein a button (5) is pressed.
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) of the electronic device (1) is determined as the greatest of the values t d providing the condition ⁇ t 0 ⁇ t d * n, ⁇ t o + t a or t o + t a + t b ⁇ t d * n j ⁇ t o +2 * t a+ t b or ... to+ (k-2) * t a + (k-2) * t b ⁇ t d * n s ⁇ t o + (k-1) * t a + (k-2) * t b ⁇ , while n, ⁇ n,
- the infrared receiver (2) detects any and only one of the first k-1 commands out of k commands which are transmitted by the infrared transmitter (4) throughout the average period wherein a button (5) is pressed, and which make the electronic device (1) leave the stand-by mode. After the detection is realized, the infrared receiver (2) is completely activated and by receiving all of the command that is after the command wherein the detection is realized, the command is decoded, and the electronic device (1) leaves the stand-by mode.
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) is increased such that it will be longer than the command period (t a ) and shorter than the stand-by period (t b ), and the power consumption of the infrared receiver (2), hence of the electronic device (1) on stand-by is reduced.
- the infrared transmitter (4) transmits the command, which makes the electronic device (1) leave the stand-by mode, at least three times throughout the average period wherein a button (5) of the remote control (3) is pressed
- the infrared receiver (2) detects any and only one of the first two transmitted commands.
- the infrared receiver (2) is required to actively detect the first command, which starts to be transmitted at any moment t 0 , or the second command, which starts to be transmitted at the moment to+ t a + t b , in the time intervals with period t d . In this situation;
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) is determined as the greatest of the values t d providing the condition
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) is determined as the greatest of the values t d providing the condition ⁇ t 0 ⁇ t d * n, ⁇ t o + t a veya t o + t a + t b ⁇ t d * n, ⁇ t o +2 * t a + t b ⁇
- the possible activating series (d, d1) of the infrared receiver (2) which are different from each other according to the moment (to) wherein the button (5) is pressed detect only the first or only the second command of the first two commands (A) ( Figure 3 and Figure 4).
- the infrared receiver (2) is completely activated and the command (H) that is after the command wherein the detection (A) is realized is decoded by being completely received, and the electronic device (1) leaves the stand-by mode.
- RC5 is used as the remote control (3) communication protocol.
- the period (t a ) for the infrared transmitter (4) to transmit a command is 24,9 milliseconds which correspond to data of 14 bits
- the stand-by period ( t b ) of the infrared transmitter (4) is 88,9 milliseconds which correspond to data of 50 bits.
- the infrared transmitter (4) transmits the command, which makes the electronic device (1) leave the stand-by mode, at least 3 times.
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) is determined as the greatest, being 46.228 milliseconds (26 bits), of the values t d providing the condition [0037] ⁇ to ⁇ t d * n, ⁇ t o + 24,9 or t o + 113,8 ⁇ td * ri j ⁇ t o + 138,7 ⁇ .
- the greatest possible value of the stand-by period (t c ) between two sequential activations of the infrared receiver (2) is 23,114 milliseconds (13 bits).
- the electronic device (1) of the present invention provides twice more power saving in RC5 protocol in comparison with the state of the art.
- the value t d hence the provided saving can be increased to the extent of the extension of the period wherein the button (5) of the remote control (3) is pressed in order to make the electronic device (1) leave the stand-by mode.
- the stand-by period (t d ) between two sequential activations of the infrared receiver (2) is determined under the same condition again.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to an electronic device (1) wherein the power consumption is reduced by adjusting the stand-by period (td) between two sequential activations of the infrared receiver (2) according to the number of commands transmitted by the infrared transmitter (4) throughout the average period wherein a single button (5) of the remote control (3) is pressed.
Description
Description
AN ELECTRONIC DEVICE
[0001] The present invention relates to an electronic device wherein the power consumption of its infrared receiver on stand-by is reduced.
[0002] In electronic devices, the infrared receiver provides the signals transmitted by means of the remote control of the electronic device to be received by the electronic device. In order that the electronic device can leave the stand-by mode, the infrared receiver is required to operate also on stand-by. The most used approach for reducing the power consumption on stand-by is that the infrared receiver of the device is kept operating under the control of a processor, and all other units are completely turned off. In this situation, reducing the amount of power consumed by the infrared receivers becomes critical.
[0003] A way of reducing the average power consumed by the infrared receivers is to supply the infrared receiver not constantly but periodically by the pulse-width modulation (PWM) - technique.
[0004] In the state of the art, circuits are present wherein the infrared units are periodically supplied. In the state of the art Japanese Patent Document No JP2007214694, a remote control signal controlling system and a receiving circuit are described for reducing the battery consumption of a remote control transmitter. The ON part frequency of the said remote control signal is configured by keeping the OFF part of the restart pulse transmitted to the receiver longer than the ON part thereof.
[0005] In the United States of America Patent Document No US2007/0041736, a receiving circuit, wherein the receiving pulses are rearranged for energy saving according to the transmitter signal, is described. In the said circuit, the pulse coming to the receiver is first evaluated by a comparator and then an output signal is generated after realizing a certain delay according to the size of the entering signal.
[0006] In the embodiments wherein the infrared receiver is periodically activated, the infrared receiver first detects the presence of a signal. After the signal is detected, the infrared receiver is completely activated. The completely activated infrared receiver decodes the next command received in the
signal. If the decoded command is a command that provides the electronic device to leave the stand-by mode, the electronic device leaves the stand-by mode.
[0007] In order that the infrared receiver in the electronic device can detect the signal emitted by the remote control transmitter, the waiting period between the sequential activation moments of the infrared receiver is configured depending on the period of the command transmitted by the transmitter when any button of the remote control is pressed. In remote controls, different remote control protocols, which differ according to the modulation of the signal emitted by the transmitter, are used.
[0008] When any button on the remote control is pressed, the infrared transmitter starts transmitting the first command. This moment is called the moment to . From the moment t0 onwards, throughout the period ta', the infrared transmitter is activated. ta' is the duration wherein the infrared transmitter is active in a period. The signal that is transmitted throughout the period ta' is a command. Therefore, the period ta' is called the "command period". After the period ta', the infrared transmitter remains passive, that is, stands by throughout a fixed period of time described as tb'. Consequently, the period tb' is called the "stand-by period" of the infrared transmitter. At the end of the period tb', in case that the button on the remote control is still pressed, the infrared transmitter is activated again for the period ta' and retransmits the same command. For each different protocol, a signal with a different modulation is generated, and the command and stand-by periods of the infrared transmitter differ according to the protocol. In order to detect that a signal is transmitted by the infrared transmitter, the infrared receiver is momentarily activated at certain intervals. The stand-by period between the sequential moments, in which the infrared receiver is activated, is represented by tc (Figure 2).
[0009] The period tc in the state of the art is determined according to the principle of detecting definitely the first command of the commands transmitted by the infrared transmitter throughout the period of time wherein the user presses the button of the remote control. Therefore, the stand-by period (tc ) between two sequential activations of the infrared receiver is adjusted
such that it will be shorter than the command period (ta') of the infrared transmitter (tc<ta'). In this situation, each of the activating series (c, d), which are different from each other according to the moment the button is pressed, of the infrared receiver detects definitely the first command of the commands transmitted by the infrared transmitter (the moment A'). When the detection is realized, the infrared receiver is completely activated and the next command is decoded (H') (Figure 2). If the command is a command that provides the electronic device to leave the stand-by mode, the electronic device leaves the stand-by mode.
[0010] However, taking into consideration that the same command is transmitted more than once throughout the average period wherein a button of the remote control is pressed by users, it is possible to make the electronic device leave the stand-by mode by keeping the stand-by period (tc) between two sequential activations of the infrared receiver on stand-by longer than the period of time in the state of the art.
[0011] The aim of the present invention is the realization of an electronic device wherein the power consumption of its infrared receiver on stand-by is reduced.
[0012] The electronic device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, is controlled by a remote control comprising an infrared transmitter and comprises an infrared receiver. The infrared transmitter of the remote control transmits the same command at least k times throughout the average period wherein a button of the remote control is pressed by the user. The stand-by period between two sequential activations of the infrared receiver is determined such that the infrared receiver will detect any and only one of the first k-1 commands out of k commands transmitted by the infrared transmitter throughout the average period wherein a button of the remote control is pressed by the user. Therefore, the stand-by period between two sequential activations of the infrared receiver on stand-by is determined such that it will be longer than the command period of the infrared transmitter and shorter than the stand-by period of the infrared transmitter. Thus, the power consumption of the electronic device
on stand-by is reduced. [0013] The electronic device realized in order to attain the aim of the present invention is illustrated in the attached figures, where: [0014] Figure 1 - is the schematic view of the electronic device of the present invention. [0015] Figure 2 - is the view of the commands which are transmitted by the infrared transmitter of the remote control throughout the pressing period of a button of the remote control and which repeat, and of different state-of-the-art activating series (c, c1) of the infrared receiver; all of which are illustrated on the time scale. [0016] Figure 3 - is the view of the activating series on the time scale wherein the first activation of the infrared receiver is before the moment the button is pressed (t0), according to the present invention. [0017] Figure 4 - is the view of the activating series on the time scale wherein the first activation of the infrared receiver is after the moment the button is pressed (t0), according to the present invention. [0018] The elements illustrated in the figures are numbered as follows:
1. Electronic device
2. Infrared receiver
3. Remote control
4. Infrared transmitter
5. Button
[0019] The electronic device (1) comprises an infrared receiver (2) and is controlled by a remote control (3). The remote control (3) comprises an infrared transmitter (4) and buttons (5). [0020] td : Stand-by period between two sequential activations of the infrared receiver (2) on stand-by [0021] d, dl : Activating moments of the infrared receiver (2) activating series which are different from each other and independent of each other, according to the present invention [0022] k : Number of transmissions of the same command by the infrared transmitter (4) throughout the average period wherein a button (5) of the remote control (3) is pressed by the user
[0023] rijj ^ s : i'th, j'th, ... s'th non-sequential activation of the infrared receiver (2)
[0024] In the electronic device (1) of the present invention, the stand-by period (td ) between two sequential activations of the infrared receiver (2) on stand-by is adjusted by the device producer according to the used remote control (3) protocol.
[0025] The period wherein a button (5) of the remote control (3) is pressed has an average of 300 milliseconds. Depending on the used protocol, the infrared transmitter (4) of the remote control (3) transmits the command, which makes the electronic device (1) leave the stand-by mode, at least k times throughout the average period wherein a button (5) is pressed.
[0026] The stand-by period (td) between two sequential activations of the infrared receiver (2) of the electronic device (1) is determined as the greatest of the values td providing the condition {t0 ≤ td *n, < to+ ta or to+ ta+ tb < td *nj < to+2*t a+ tb or ... to+ (k-2)*ta+ (k-2)*tb < td *ns < to+ (k-1)*ta + (k-2)*tb}, while n, < n,
< < ns (nh rij, ns e Z+). Thus, the infrared receiver (2) detects any and only one of the first k-1 commands out of k commands which are transmitted by the infrared transmitter (4) throughout the average period wherein a button (5) is pressed, and which make the electronic device (1) leave the stand-by mode. After the detection is realized, the infrared receiver (2) is completely activated and by receiving all of the command that is after the command wherein the detection is realized, the command is decoded, and the electronic device (1) leaves the stand-by mode.
[0027] Thus, the stand-by period (td) between two sequential activations of the infrared receiver (2) is increased such that it will be longer than the command period (ta) and shorter than the stand-by period (tb), and the power consumption of the infrared receiver (2), hence of the electronic device (1) on stand-by is reduced.
[0028] In an embodiment of the present invention, if the infrared transmitter (4) transmits the command, which makes the electronic device (1) leave the stand-by mode, at least three times throughout the average period wherein a button (5) of the remote control (3) is pressed, the infrared receiver (2) detects any and only one of the first two transmitted commands. In order to realize this, the infrared receiver (2) is required to actively detect the first
command, which starts to be transmitted at any moment t0, or the second command, which starts to be transmitted at the moment to+ ta+ tb, in the time intervals with period td. In this situation;
[0029] while n, < n, (n,, nJ e Z+),
[0030] the stand-by period (td) between two sequential activations of the infrared receiver (2) is determined as the greatest of the values td providing the condition
[0031] {to < td * n, < to+ ta or to+ ta+ tb < td * n, < to+2* t^ tb}.
[0032] When the stand-by period (td) between two sequential activations of the infrared receiver (2) is determined as the greatest of the values td providing the condition {t0 < td * n, < to+ ta veya to+ ta+ tb < td * n, < to+2* ta+ tb}, the possible activating series (d, d1) of the infrared receiver (2) which are different from each other according to the moment (to) wherein the button (5) is pressed detect only the first or only the second command of the first two commands (A) (Figure 3 and Figure 4). After the detection (A) is realized, the infrared receiver (2) is completely activated and the command (H) that is after the command wherein the detection (A) is realized is decoded by being completely received, and the electronic device (1) leaves the stand-by mode.
[0033] In another embodiment of the present invention, RC5 is used as the remote control (3) communication protocol. For the RC5 protocol; the period (ta) for the infrared transmitter (4) to transmit a command is 24,9 milliseconds which correspond to data of 14 bits, and the stand-by period ( tb) of the infrared transmitter (4) is 88,9 milliseconds which correspond to data of 50 bits. In this situation, throughout 300 milliseconds which is the average period wherein a button (5) of remote control (3) is pressed, the infrared transmitter (4) transmits the command, which makes the electronic device (1) leave the stand-by mode, at least 3 times.
[0034] In this situation;
[0035] while n, < n, (n,, n, e Z+),
[0036] the stand-by period (td) between two sequential activations of the infrared receiver (2) is determined as the greatest, being 46.228 milliseconds (26 bits), of the values td providing the condition
[0037] {to < td * n, < to+ 24,9 or to+ 113,8 < td * rij < to+ 138,7 }.
[0038] In the state of the art, the greatest possible value of the stand-by period (tc ) between two sequential activations of the infrared receiver (2) is 23,114 milliseconds (13 bits). The electronic device (1) of the present invention provides twice more power saving in RC5 protocol in comparison with the state of the art.
[0039] The value td, hence the provided saving can be increased to the extent of the extension of the period wherein the button (5) of the remote control (3) is pressed in order to make the electronic device (1) leave the stand-by mode. In a situation that the period of time, wherein the button (5) of the remote control (3) is pressed in order to make the electronic device (1) leave the stand-by mode, is predefined, the stand-by period (td) between two sequential activations of the infrared receiver (2) is determined under the same condition again.
Claims
1. An electronic device (1) comprising an infrared receiver (2) which is controlled by a remote control (3) having an infrared transmitter (4) and which is characterized in that the stand-by period (y between two sequential activations of the infrared receiver (2) on stand-by is
- longer than the command period of the infrared transmitter (4) (td > ta) and
- shorter than the stand-by period of the infrared transmitter (4) (td < tb).
2. An electronic device (1) as in Claim 1 , wherein the stand-by period (td) between two sequential activations of the infrared receiver (2) on stand-by is determined by the device producer as the greatest td value providing the condition {t0 < td*n, < to+ ta or to+ ta+ tb < t/n, < to+2*ta+ tb or ... to+ (k-2)*ta+ (k-2)*tb < td*ns < to+ (k-1)*ta + (k-2)*tb}, while n, < n, < < ns (n|J n, ns e Z
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR200809941 | 2008-12-29 | ||
| PCT/EP2009/067292 WO2010076220A1 (en) | 2008-12-29 | 2009-12-16 | An electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2370962A1 true EP2370962A1 (en) | 2011-10-05 |
Family
ID=42102174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09802130A Withdrawn EP2370962A1 (en) | 2008-12-29 | 2009-12-16 | An electronic device |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2370962A1 (en) |
| WO (1) | WO2010076220A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4945656B2 (en) * | 2010-04-15 | 2012-06-06 | ローム株式会社 | Remote control signal receiving apparatus and electrical equipment using the same |
| EP2578593A1 (en) | 2011-10-04 | 2013-04-10 | Fundació Privada Institut Català de Nanotecnologia | Method for the preparation of metal organic frameworks |
| WO2017152240A1 (en) | 2016-03-11 | 2017-09-14 | Commonwealth Scientific And Industrial Research Organisation | Polymeric agents and compositions for inhibiting corrosion |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9500011A (en) * | 1995-01-03 | 1996-08-01 | Techniku B V | Remote control system. |
| JP3392751B2 (en) * | 1998-01-30 | 2003-03-31 | 三洋電機株式会社 | Remote control device |
| US6236850B1 (en) * | 1999-01-08 | 2001-05-22 | Trw Inc. | Apparatus and method for remote convenience function control with increased effective receiver seek time and reduced power consumption |
| US7551057B2 (en) * | 2005-11-04 | 2009-06-23 | Lear Corporation | Remote entry system with increased transmit power and reduced quiescent current |
-
2009
- 2009-12-16 EP EP09802130A patent/EP2370962A1/en not_active Withdrawn
- 2009-12-16 WO PCT/EP2009/067292 patent/WO2010076220A1/en active Application Filing
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2010076220A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010076220A1 (en) | 2010-07-08 |
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