JP2000175124A - Power unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drastically reduce the power consumption of a remote control waiting state to almost 0 W by permitting a decoder to turn on, to decode a remote control signal, to turn on a second switch means in the case of a power-on signal and to turn on main power. SOLUTION: When a remote control signal is received by a remote control photodetector 6, current flowing in the photodetector 6 by photoelectric conversion is accumulated in a capacitor connected to the photodetector 6 and converted into voltage. When the voltage of a capacitor reaches prescribed voltage, a first switch means 23 is turned on and power voltage is added to the decoder 24 of the remote control signal. A decoder 24 is turned on and the remote control signal is decoded. In the case of a power on signal, a second switch means 9 is turned on and a main power circuit 12 is turned on. It is not necessary to add power voltage to the remote control photodetector 6 and the other circuit that consumes power does not exist. Thus, power consumption at the time of remote control standby is almost set to 0 W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply used in a television receiver or the like.

[0002]

2. Description of the Related Art Conventional power supplies for television receivers,
In particular, a remote control standby power supply device (hereinafter, referred to as a remote control power supply) will be described with reference to FIG. In FIG. 7, 1 is an AC outlet, 2 is a line filter, 3 is a transformer, 4 is a rectifier diode, 5 is an electrolytic capacitor, 6 is a remote control light receiving element, 7 is a waveform shaping circuit, 8 is a regulator, 9 is a main power supply relay, 10 is a bridge rectifier circuit for a main power supply, 11 is a smoothing capacitor, 12 is a main power supply, 13 is a secondary output of the main power supply, 14 is a microcomputer that decodes a remote control signal and controls a television receiver,
15 is a control signal for turning on / off the main power relay 9;
Is a transistor. When the AC outlet 1 is plugged into a commercial power supply, a current flows through the primary side of the transformer 3, so that about 9 V is output to the secondary side according to the winding ratio. At this time, since the relay 9 is off, the main power supply does not operate. The output of the transformer 3 is rectified by the diode 4 and the smoothing capacitor 5 to DC12V. This voltage is stabilized at 5 V by the regulator 8 and used as a power source for the waveform shaping circuit 7 and the microcomputer 14. The remote control light receiving element 6 is constituted by a photodiode, and when receiving a remote control signal in the infrared region, outputs a voltage signal by photoelectric conversion, so that a power supply is not particularly required. At this time, since a low-level voltage is output from the microcomputer 14 as the control signal 15 for the relay 9, the transistor 16 is turned off and the relay 9 is also turned off. When a signal using infrared light is input from the remote controller to the remote control light-receiving element 6, the remote control light-receiving element 6 outputs a weak voltage signal photoelectrically converted as described above, and the remote control signal further shaped by the waveform shaping circuit 7. Is output to the microcomputer 14. The microcomputer 14 decodes the input signal, and if the signal is “power on”, the control output 1
5, a high-level voltage is output as a control signal for the relay 9, the transistor 16 is turned on, and the relay 9 is turned on. When the relay 9 is turned on, the commercial AC input
Rectified by the smoothing capacitor 11 and the main power supply 12 is started,
An output 13 of a predetermined voltage is output to the secondary side. The secondary output 13 is applied to the deflection / high-voltage system, audio output system, and signal processing circuit of the television receiver to enter a normal viewing state.

When a remote control signal in a normal viewing state is received by the remote control light receiving element 6, a waveform-shaped output is input to the microcomputer 14 and decoded, and a process corresponding to the signal is executed. . When a "power off" remote control signal is input in the normal viewing state, the remote control signal is decoded by the microcomputer 14 in the same manner as described above, and after confirming that the signal is the "power off" signal, the microcomputer 14 saves data. After performing necessary processing, L is output to the control signal 16 of the relay 9 and the relay 9 is turned off. When the relay 9 is turned off, the voltage of the smoothing capacitor 11 gradually decreases, so that the main power supply 12 stops soon, the secondary output 13 decreases, and the deflection / high voltage circuit, the audio output circuit, and the signal processing circuit stop operating. . Further, since the power supply voltage is continuously supplied to the remote control light-receiving element 6, the waveform shaping circuit 7, and the microcomputer 14 via the transformer 3, the same operation as described above is repeated by inputting the power-on remote control signal again. The power is turned on.

At this time, the power consumption during standby of the remote control includes the iron loss and copper loss of the transformer 3, the loss of the rectifier diode 4, the loss of the regulator 8, the power consumption of the remote control light receiving element 6, the waveform shaping circuit 7, the microcomputer 14, and the like. About 1-3W including
It has become.

[0005]

In general, a television receiver is hardly unplugged from an AC outlet after installation, and even when the television receiver is not being watched, that is, in a so-called remote control standby state, about 1 to 3 W as described above. In terms of consumption, the impact on the environment is not negligible given the very high penetration rate of television receivers as household electronic devices worldwide, and furthermore, in the remote control standby state Power consumption must also be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a remote control power supply that greatly reduces power consumption in a remote control standby state to almost 0 W.

[0007]

In order to solve the above problems, the present invention provides: (1) When a remote control signal is continuously received by a remote control light receiving element, a photoelectromotive force generated in the light receiving element by photoelectric conversion is calculated. The voltage is converted into a voltage by accumulating in a capacitor connected to the light receiving element, and when the voltage of the capacitor reaches a certain voltage, the first switch is turned on to apply a power supply voltage to a decoder of a remote control signal. Is turned on, the remote control signal is decoded, and if the signal is a power-on signal, the main power is turned on by turning on the second switch means.

(2) A light receiving element for a remote control signal, a means for detecting a remote control continuous signal, a means for decoding the remote control signal, a means for generating a DC voltage, and the remote control continuous signal detecting means detect the remote control continuous signal. A television receiver comprising: first switch means configured to turn on upon detection and apply the DC voltage to the decoding means; a main power supply; and second switch means for turning on the main power supply. 2. The television according to claim 1, wherein said decoding means turns on said second switch means to turn on a main power supply when a power-on remote control signal is continuously received. It is a power supply device for the receiver.

(3) A television receiver comprising a remote control light receiving element, a decoder for a remote control signal, and a solar cell, wherein the power supply voltage of the remote control light receiving element and the decoder is controlled by the solar cell while the main power is off. Supply,
While the main power is on, the power is supplied from the output of the main power.

(4) A light receiving element for a remote control signal, a circuit for shaping the output waveform of the light receiving element, means for converting the signal to a DC voltage when the light receiving element receives a remote control continuous signal, and an output of the shaping circuit Receiving means for decoding a remote control signal, a solar cell, a control circuit for controlling the output of the solar cell, and turning on when the voltage of the voltage conversion means reaches a predetermined voltage. , A first switch means configured to add the signal to the shaping circuit and the decoding means, a main power supply, a second switch means for turning on and off the main power supply, and a control circuit for the second switch means. A power supply device for a television receiver according to claim 3.

(5) The power supply device for a television receiver according to claim 4, wherein the solar cell is installed in a place other than the television receiver.

(6) The power supply device for a television receiver according to the above (5), wherein the solar cell is installed on a satellite dish receiving parabolic antenna.

With the above-described configuration, it is possible to provide a power supply that consumes almost no power during standby of the remote controller and hardly increases the cost.

[0014]

According to the first aspect of the present invention, when a remote control signal is received by a remote control light-receiving element, a current flowing through the element is stored in a capacitor connected to the element by photoelectric conversion. When the voltage of the capacitor reaches a certain voltage, the first switch means is turned on to apply a power supply voltage to a remote control signal decoder, and the remote control signal decoder is turned on to decode the remote control signal, and In the case of an ON signal, the main power supply is turned on by turning on the second switch means, and it is not necessary to apply a power supply voltage to the remote control light-receiving element. Since there is no circuit for consuming the power, there is an effect that the power consumption is reduced to almost 0 W during the standby time of the remote controller.

According to a second aspect of the present invention, a light receiving element for a remote control signal, a capacitor for storing a current flowing through photoelectric conversion when the light receiving element receives a remote control signal, and a commercial power supply are rectified. Means for decoding a DC voltage, a remote control signal, a first switch means set to turn on when the voltage of the capacitor reaches a threshold value and to apply the DC voltage to the decoding means, and a main power supply. A power supply device having second switch means for turning on, wherein the decoding means turns on the second switch means to turn on a main power supply when a power-on remote control signal is continuously received. It is a power supply device with a distinctive feature, and there is no need to apply a power supply voltage to the remote control light-receiving element, and there is no other circuit that consumes power. There is an action that most to 0W power consumption at the time of control wait.

According to a third aspect of the present invention, there is provided a television receiver comprising a remote control light receiving element, a remote control signal decoder, and a solar cell, wherein the power supply of the remote control light receiving element and the decoder is provided while a main power supply is off. A power supply device for a television receiver, characterized in that a voltage is supplied from the solar cell and supplied from an output of the main power supply while the main power supply is on, and a remote control signal shaping circuit and a remote control signal decoder are provided. Since there is no need to apply a power supply voltage using a commercial AC power supply and there is no other circuit that consumes power, there is an effect that the AC power consumption is reduced to almost 0 W when the remote control is in standby.

According to a fourth aspect of the present invention, when a remote control signal is continuously received by a remote control light receiving element, photoelectromotive force generated in the light receiving element by photoelectric conversion is accumulated in a capacitor connected to the light receiving element. When the voltage of the capacitor reaches a predetermined voltage, the first switch means is turned on, and the output of the solar cell is added to the waveform shaping circuit and the decoder of the remote control signal,
The decoder turns on and decodes the remote control signal,
2. A main power supply is turned on by turning on a second switch means in the case of a power on signal.
The power supply device for a television receiver described in the above,
There is no need to apply a power supply voltage using commercial AC power to the remote control signal shaping circuit and remote control signal decoder.
In addition, since there is no other circuit that consumes power, there is an effect that the AC power consumption is reduced to almost 0 W when the remote controller is on standby.

According to a fifth aspect of the present invention, there is provided the power supply device for a television receiver according to the fourth aspect, wherein the solar cell is installed in a place other than the television receiver. As in the invention described in Item 4, there is an effect that the AC power consumption is reduced to almost 0 W during the remote control standby.

According to a sixth aspect of the present invention, there is provided the power supply device for a television receiver according to the fifth aspect, wherein the solar cell is installed in a satellite dish receiving parabolic antenna. Similar to the invention described in the fifth aspect, there is an effect that the AC power consumption is almost 0 W at the time of standby of the remote controller.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) A power supply device according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2 using an example of a power supply device constituting a television receiver.

FIG. 1 is a block diagram of a power supply device according to Embodiment 1 of the present invention, and FIG. 2 shows waveforms at various parts in FIG. In FIG. 1, 1 is an AC outlet, 2 is a line filter, 4 is a rectifier diode, 5 is an electrolytic capacitor, 6 is a remote control light receiving element, 7 is a remote control waveform shaping circuit, 9 is second switch means, and 10 is a bridge rectifier circuit. , 11 is a smoothing capacitor, 12 is a main power supply, 1
3 is a secondary side output, 14 is a microcomputer for controlling the television receiver (hereinafter simply referred to as a microcomputer), 15 is a control signal for turning on / off the switch means 9, 17 is a primary side output,
18 and 19 are regulators, 20 is a 5 VDC voltage, 2
1 is a resistor, 22 is a voltage conversion circuit, 23 is first switch means, 24 is a decoder, 25 is a photocoupler, and 50 is a diode. In FIG. 2, waveforms (a) to (g) show the waveforms at various points at points a to g in FIG. 1. Waveforms (a) and (b) show the time axis of the corresponding part of waveform (c). (D ') is an enlarged view of the time axis of the corresponding portion of the waveform (d). When an infrared remote control signal is received by the remote control light receiving element 6, a voltage signal (a) that is photoelectrically converted is output, and is converted into a voltage by the voltage conversion circuit 22 as shown in (b). The light receiving element 6 is generally composed of a photodiode and a signal amplification circuit. However, in the present embodiment, a power supply voltage is not supplied to avoid power consumption, and a plurality of photodiodes are required to be integrated. The output voltage has been obtained. Remote control signal is 1
At the end of each signal, there is a non-signal period called a trailer, and the same signal is repeated again, so that the voltage at point b (or c) in FIG. 1 gradually increases as shown in FIG. 2 (c). When the threshold value of the switch means 23 is reached at time t0, the switch means 23 is turned on and charges the capacitor 5 with the commercial AC voltage via the rectifier diode 4 and the resistor 21 as shown in FIG. The voltage of the capacitor 5 is applied to the decoder 24 and the remote control waveform shaping circuit 7. When the decoder 24 starts operating at time t1, the decoding of the remote control signal output from the remote control waveform shaping circuit 7 starts. At this time, since the resistance 21 is set to several tens of kΩ and the current consumed by the remote control waveform shaping circuit 7 and the decoder 24 is at most several mA at the same time, the power consumption of the resistance 21 is 0.1 mA.
It is extremely small at 1 W or less. Decoder 24
Outputs the signal for turning on the second switch means 9 at time t2 after detecting the same remote control signal a plurality of times in order to prevent a malfunction.
In addition, since the voltage of the smoothing capacitor 11 rises as shown in (g), the main power supply 12 starts and outputs a predetermined voltage to the primary output 17 and the secondary output 13. 1
The secondary side output 17 is stabilized to about 5.7 V by the regulator 18 and about 5.0 V is applied to the decoder 24 and the remote control waveform shaping circuit 7 via the diode 50, so that the input of the remote control signal is lost and the switch means 23 is turned off. After that, the operation continues. A part of the secondary side output 13 is stabilized at 5 V through the regulator 19 and is applied to the microcomputer 14 and its peripheral circuits. Therefore, the microcomputer 14 starts operation and sends initialization data to each circuit to initialize each circuit. Become At the same time, the secondary output 13 is applied to the deflection / high voltage system, audio output system, and signal processing circuit of the television receiver, so that the television receiver enters a normal viewing state.

When a remote control signal is input in a normal viewing state, the remote control signal is received by the remote control light-receiving element 6, decoded by the decoder 24 through the remote control waveform shaping circuit 7, and at the same time by the microcomputer through the photocoupler 25. 14 and decoded by the microcomputer 14 to execute normal processing. When the decoder 24 and the microcomputer 14 detect a "power off" signal in this normal viewing state, the microcomputer 14 performs necessary processing such as saving data.
After waiting for the time necessary for the processing, the switch means 9 is turned off. When the switch means 9 is turned off, the smoothing capacitor 11
, The main power supply 12 eventually stops, and the voltages of the primary output 17 and the secondary output 13 decrease. Therefore, when the microcomputer 14 stops its operation and turns off the remote control continuous signal, the decoder 24 and the waveform shaping circuit 7 are turned off.
Also stops operation, and enters a standby state for input of a remote control signal, thereby consuming no power. In this state, if the "power on" remote control signal is input again, the same operation as described above is repeated to activate the main power supply and watch the television receiver.

In the power supply device according to the first embodiment, the power supply can be reduced to almost 0 W by the above configuration because the power supply does not operate during standby of the remote controller and there is no circuit that causes loss.

(Embodiment 2) A power supply device according to Embodiment 2 of the present invention will be described with reference to FIG.

FIG. 3 is a block diagram of a power supply device according to Embodiment 2 of the present invention. In FIG. 3, 1-2, 4-
7, 9 to 15, 19 to 20, and 22 to 23 are the same as those in FIG. 1, but the microcomputer 14 decodes the remote control signal and controls the television receiver. 3 is a transformer, and 51 and 52 are diodes. In FIG. 3, the waveforms at various points from a to g in FIG. 3 are the same as the waveforms from (a) to (g) in FIG.

When the remote control light-receiving element 6 receives the remote control signal, the photoelectrically converted signal (a) is output, and the output of the voltage conversion circuit 22 is converted into a voltage as shown in (b). When one signal ends, the remote control signal has a non-signal period called a trailer, and the same signal is repeated again, so that the voltage gradually increases as shown in (c).
When the threshold value of the switch means 23 is reached at time t0, the switch means 23 is turned on, and a commercial AC voltage is applied to the transformer 3, so that a voltage proportional to the winding ratio is generated on the secondary side, and rectified by the rectifier diode 4. Then, the voltage is smoothed to about 7 V by the electrolytic capacitor 5. The voltage of the electrolytic capacitor 5 is stabilized to about 5.7 V by the regulator 8, and about 5.0 V is applied to the microcomputer 14 and the remote control waveform shaping circuit 7 via the diode 52. When the microcomputer 14 starts operating at the time t1, the decoding of the remote control signal output from the remote control waveform shaping circuit 7 is started. After detecting the "power-on" remote control signal a plurality of times to prevent malfunction, when a signal for turning on the second switch means 9 is output at time t2, the commercial AC voltage is applied to the bridge rectifier circuit 10 and the voltage of the smoothing capacitor 11 is increased. Rises as shown in (g), the main power supply 12 is activated and outputs a predetermined voltage to the secondary output 13. The secondary output 13 is added to the deflection / high voltage system, audio output system, and signal processing circuit of the television receiver to enter a normal viewing state, and a part of the secondary output 13 controls the regulator 19. The voltage is stabilized at 5.7 V via the input terminal, and 5.0 V is applied via the diode 51 to the microcomputer 14, the remote control waveform shaping circuit 7 and its peripheral circuits. Even if the remote control signal is not input and the switch means 23 is turned off, the current state is maintained because 5.0 V is applied to the microcomputer 14.

When a remote control signal is received by the remote control light receiving element 6 in the normal viewing state, the remote control signal is input to the microcomputer 14 via the remote control waveform shaping circuit 7, and the microcomputer 14 decodes the remote control signal and executes a normal process. I do. When a remote control signal of "power off" is inputted in the normal viewing state, the microcomputer 14 decodes the data, performs necessary processing such as storing data, and then turns off the switch means 9. When the switch means 9 is turned off, the smoothing capacitor 1
Since the voltage of 1 gradually decreases, the main power supply 12 eventually stops, and the secondary output 13 decreases. Therefore, microcomputer 1
4. The waveform shaping circuit 7 stops its operation and enters a standby state for inputting a remote control signal, so that power consumption is eliminated. If a remote control signal of "power on" is input again in the remote control standby state, the same operation as described above is repeated to turn on the power and watch the television receiver.

With the above configuration, the power supply device according to the second embodiment can reduce power consumption to almost 0 W because the power supply does not operate during standby of the remote controller and there is no circuit that causes loss.

(Embodiment 3) A power supply unit according to Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 4 is a block diagram of a power supply device according to Embodiment 3 of the present invention. FIG. 5 shows waveforms at various points in FIG. In FIG. 4, 1-2, 6-7, 9-1
5, 19 to 20, and 23 are the same as those in FIG. 1, 30 is a solar cell, 31 is a control circuit of the solar cell, 32 is a diode,
3 is an electrolytic capacitor, 51 is a diode, and 53 is an AC switch. In FIG. 5, waveforms (a) to (d) show the waveforms at various points from point a to point d in FIG. 4, and waveform (a ') expands the time axis of the corresponding part of (a). It is shown. When a remote control signal is received by the remote control light receiving element 6 at time t0, the output signal of the light receiving element 3 is shaped by the waveform shaping circuit 7 and the waveforms shown in (a) and (a ') are output to the decoder 5. At this time, (a) represents a continuous remote control signal, and (a ') is an enlarged version of the signal for one time. The remote control signal is
At the end of each signal, the same signal is repeated across a non-signal period called a trailer. A power supply voltage is stably supplied to the waveform shaping circuit 7 and the microcomputer 14 by the solar cell 30 and the control circuit 31, and decoding starts at time t0. The microcomputer 14 detects the same remote control signal a plurality of times to prevent malfunction,
At time t1, a control signal for turning on the second switch means 9 is output as shown in (b). Then, the commercial AC voltage is applied to the bridge rectifier circuit 10 and the voltage of the smoothing capacitor 11 rises as shown in FIG.
2 starts and outputs a predetermined voltage to the secondary output 13. 2
The secondary output 13 is added to the deflection / high-voltage system, audio output system, and signal processing system of the television receiver to enter a normal viewing state, and a part of the secondary output 13 is transmitted through the regulator 19. And is applied to the microcomputer 14 and its peripheral circuits via the diode 51.

When the remote control signal input in the normal viewing state is received by the remote control light-receiving element 6, it is input to the microcomputer 14 via the remote control waveform shaping circuit 7, decoded, and processed in accordance with the content of the input remote control signal. Is to be executed. Further, when a remote control signal of “power off” is input in the normal viewing state, the microcomputer 14 performs necessary processing such as saving data after decoding, and turns off the switch means 9. When the switch means 9 is turned off, the voltage of the smoothing capacitor 11 gradually decreases, so that the main power supply 12 stops and the secondary output 13 decreases. Therefore, the television receiver stops its operation, but the waveform shaping circuit 7 and the microcomputer 14 operate by the voltage supplied from the solar cell 30 and the control circuit 31 and the voltage of the electrolytic capacitor 33 charged when the main power is turned on, and wait for the remote control. Since the state continues, there is no need to supply any power from the commercial AC power supply.

In the standby state of the remote controller, the power is turned on again.
When the remote control signal is input, the power supply is started by repeating the same operation as described above, and the television receiver can be viewed.

If there is not enough illuminance at the place where the television receiver is installed, or if there is any trouble in the solar battery, the solar battery does not generate enough power. The capacity of the electrolytic capacitor is set so as to maintain the power supply voltage during the day and night. However, if the battery is not charged for a longer period of time, the voltage drops, the microcomputer 14 stops, and the remote control signal cannot be decoded. Main power supply 1 by AC switch 53
2 can be turned on.

With the above configuration, the power supply device according to the third embodiment can reduce power consumption to almost 0 W because the power supply does not operate during standby of the remote controller and there is no circuit that causes loss.

(Embodiment 4) A power supply unit according to Embodiment 4 of the present invention will be described with reference to FIG. 6 using an example of a power supply unit of a television receiver.

FIG. 6 is a block diagram of a power supply device for a television receiver according to a fourth embodiment of the present invention. The waveforms at various parts in FIG. 6 are the same as those shown in FIG. In FIG. 6, 1-2, 6-7, 9-15, 19-20, 30
Reference numerals 33, 51, and 53 are the same as those of the third embodiment, 22 is a voltage conversion circuit, and 34 is an electrolytic capacitor. In FIG. 6, the waveform of each part from point a to point g in FIG.
(A) to (g), and the waveforms (a) and (b)
FIG. 7A is an enlarged view of the time axis of the corresponding portion of the waveform (c), and FIG. 7D is an enlarged view of the time axis of the corresponding portion of the waveform (d). When the remote control light-receiving element 6 receives the remote control signal, the photoelectrically converted signal (a) is output, and is converted into a voltage by the voltage conversion circuit 22 as shown in (b). The light receiving element 3 is generally formed of a photodiode, but in the present embodiment, a plurality of photodiodes are integrated and used to obtain a required output voltage.
When the remote control signal is transmitted from the remote control, 30
Since the frequency is modulated by a subcarrier of 40 kHz to 40 kHz, the result is as shown in FIG. When one signal ends, the remote control signal has a non-signal period called a trailer, and the same signal is repeated again, so that the voltage gradually increases as shown in (c). When the threshold value of the switch means 23 is reached at time t0, the switch means 23 is turned on, and is controlled by the solar cell 30 and the control circuit 31 to control the electrolytic capacitor 34.
Is applied to the waveform shaping circuit 7 and the microcomputer 14 via the diode 32, the time t1
Then, the waveform shaping circuit 7 and the microcomputer 14 start operating. The output of the light receiving element 3 is shaped by the waveform shaping circuit 7 and the waveform shown in FIG. The waveform shaping circuit 7 amplifies the signal output from the remote controller,
The waveform of (d ') is output by performing F, detection, comparison, and the like. At this time, (d) indicates a continuous remote control signal, and the remote control signal is configured such that the same signal is repeated after one signal is completed, with a non-signal period called a trailer interposed therebetween. After detecting the same remote control signal a plurality of times in order to prevent malfunction,
When a control signal for turning on the second switch means 9 is output as shown in (f) in (2), the commercial AC voltage is applied to the bridge rectifier circuit 10 and the voltage of the smoothing capacitor 11 rises as shown in (g). Therefore, the main power supply 12 is activated and outputs a predetermined voltage to the secondary output 13. Subsequent operations are the same as in the second embodiment. With such a configuration, the electric power generated by the solar cell 30 is
The power stored in the electrolytic capacitor 34 is retained for a long time because the power is consumed only when the remote control continuous signal is input and is not consumed otherwise. It is possible to maintain power for a long time even without the above. However, if there is not enough illuminance at the location where the television receiver is installed, or if there is a problem with the solar battery, power generation by the solar battery may not be sufficient and the remote control may not be able to be turned on. As in the third embodiment, the main power supply 12 can be turned on by the AC switch 53.

According to the power supply device of the fourth embodiment, the power supply can be reduced to almost 0 W because the power supply does not operate during standby of the remote controller and there is no circuit that causes a loss.

(Embodiment 5) A power supply device according to Embodiment 5 of the present invention will be described with reference to FIG. 6 using an example of a power supply device of a television receiver.

A power supply device for a television receiver according to the fifth embodiment of the present invention is the same as that shown in FIG. 6, and the operation of each unit is the same as that shown in FIG. The present embodiment is characterized in that the solar cell shown in FIG. 6 is installed in a form other than the television receiver, for example, in the form of a solar cell panel outside, for example, outdoors. As a result, sufficient illuminance is always ensured for power generation of the solar cell 30 during the day, so that the power generated by the solar cell 30 is
4, the power is consumed only when the remote control continuous signal is input, and is not consumed otherwise. Therefore, the power stored in the electrolytic capacitor 34 is held for a long time, and the illuminance is reduced in cloudy or rainy weather. Even in this case, long-term power retention is possible. However, in the case where some trouble occurs in the solar battery, power generation by the solar battery is not sufficiently performed, and there is a possibility that the power cannot be turned on by the remote controller.
Similarly, the main power supply 12 can be turned on by the AC switch 53.

In the power supply device according to the fifth embodiment, the power supply can be reduced to almost 0 W by the above configuration because the power supply does not operate during standby of the remote controller and there is no circuit that causes loss.

(Embodiment 6) A power supply device according to Embodiment 6 of the present invention will be described with reference to FIG. 6 using an example of a power supply device of a television receiver.

The block diagram of the television receiver power supply device according to the sixth embodiment of the present invention is the same as that of FIG. 6, and the operation of each unit is the same as that shown in FIG. This embodiment is characterized in that the solar cell 30 shown in FIG. 6 is installed separately from a television receiver, for example, integrally with an outdoor, especially a satellite dish for receiving satellite broadcasting. And The power cable for the solar battery is bundled with the cable for receiving the satellite broadcast and wired to the indoor television receiver body, so that there is an advantage that it is not necessary to perform the wiring work only with the solar battery cable. The operation is exactly the same as in the fifth embodiment.

With the above configuration, the power supply device according to the sixth embodiment can reduce power consumption to almost 0 W because the power supply does not operate during standby of the remote controller and there is no circuit that causes loss.

[0043]

As described above, according to the power supply device of the present invention, since the power supply does not operate during standby of the remote controller and there is no circuit that causes loss, the power consumption during standby of the remote controller can be reduced to almost 0 W. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of a power supply device according to a first embodiment of the present invention.

FIG. 2 is a waveform diagram of each part of the power supply device of FIG. 1;

FIG. 3 is a block diagram of a power supply device according to a second embodiment of the present invention.

FIG. 4 is a block diagram of a power supply device according to a third embodiment of the present invention.

FIG. 5 is a waveform diagram of each part of the power supply device of FIG. 4;

FIG. 6 is a block diagram of a power supply device according to a fourth embodiment of the present invention.

FIG. 7 is a block diagram of a conventional power supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC outlet 2 Line filter 3 Transformer 4 Rectifier diode 5 Electrolytic capacitor 6 Remote control light receiving element 7 Remote control waveform shaping circuit 8 Regulator 9 Relay (switch means) 10 Bridge rectifier circuit 11 Smoothing capacitor 12 Main power supply 13 Secondary output 14 Microcomputer 15 Control Output 16 Transistor 17 Primary output 18 Rectifier diode 19 Regulator 20 5V 21 Resistance 22 Voltage conversion circuit smoothing capacitor 23 Switch means regulator 24 Decoder 25 Photocoupler 30 Solar cell 31 Control circuit 32 Diode 33, 34 Electrolytic capacitor 50, 51, 52 Diode 53 switch

Claims (6)

[Claims] When a remote control signal is continuously received by a remote control light receiving element, a photo electromotive force generated in the light receiving element by photoelectric conversion is converted into a voltage by accumulating it in a capacitor connected to the light receiving element. When the voltage of the capacitor reaches a certain voltage, the first switch means is turned on to apply a power supply voltage to a remote signal decoder, and the decoder is turned on to decode the remote control signal. A power supply device, wherein a main power supply is turned on by turning on a second switch means. 2. A remote control signal light receiving element, means for detecting a remote control continuous signal, means for decoding the remote control signal, means for generating a DC voltage, and wherein the remote control continuous signal detection means detects the remote control continuous signal. A television receiver comprising: a first switch means configured to turn on and apply the DC voltage to the decoding means; a main power supply; and a second switch means for turning on the main power supply. The power supply device according to claim 1, wherein the decoding means turns on the second switch means to turn on a main power supply when an on remote control signal is continuously received. 3. A television receiver comprising a remote control light receiving element, a remote control signal decoder, and a solar cell, wherein power supply voltages of the remote control light receiving element and the decoder are supplied by the solar cell while main power is off. And a power supply that supplies power from the output of the main power supply while the main power supply is on. 4. A light receiving element for a remote control signal, a circuit for shaping an output waveform of the light receiving element, means for converting the signal to a DC voltage when the light receiving element receives a remote control continuous signal,
Means for receiving the output of the shaping circuit to decode a remote control signal, a solar cell, a control circuit for controlling the output of the solar cell, and turning on when the voltage of the voltage conversion means reaches a predetermined voltage. First switching means configured to apply an output voltage of a solar cell to the shaping circuit and the decoding means, a main power supply, second switching means for turning on and off the main power supply, and control of the second switching means The power supply device according to claim 3, wherein the power supply device has a circuit. 5. The power supply device according to claim 4, wherein the solar cell is installed in a place other than the television receiver. 6. The power supply device according to claim 5, wherein the solar cell is formed integrally with the satellite dish receiving parabolic antenna.