JPH11341703A - Power supply - Google Patents

Abstract

(57) [Problem] To provide a power supply device that can always keep a remote control circuit in a standby state without constantly flowing current from a power supply. SOLUTION: When sunlight shines on a solar cell unit 7 serving also as an antenna base, a voltage is generated from a solar cell 17 and the rechargeable battery 4 is charged through an overcharge prevention circuit 8. The remote control signal emitted from the transmitter turns on the light detection transistor 9 of the remote control light receiving sensor 2,
A current is supplied from the rechargeable battery 4, the drive means 3 turns on the transistors Q1, Q2, and Q3 for a certain period of time to activate the solenoid coil X1, closes the primary power switch S1, and activates the main DC power supply circuit 10. A power supply voltage is applied to the main body circuit 15, the waveform shaping circuit 5, and the control means 6,
In addition, a current is supplied to the solenoid coil X1 via the diode 11, and the rechargeable battery 4 is charged. Control circuit 6
The holding circuit 14 controlled by the above holds this state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for electronic equipment which can open and close a power supply by remote control using infrared rays or the like.

[0002]

2. Description of the Related Art Conventionally, even when a power supply device is in a remote control standby state when a power supply is turned off, it is necessary to energize a control circuit and a remote control light-receiving sensor. An auxiliary power circuit using a small, low-loss power transformer was installed.

In FIG. 4 of a block diagram showing a circuit configuration of a conventional power supply device, a remote control light-receiving sensor 2 having a photodetector transistor 9 and a waveform shaping circuit 5 and a control circuit 6a include a low-loss power transformer T2. Rectifier D
The power is supplied from an auxiliary power supply circuit 20, which is constituted by a smoothing capacitor C3 and a drain D9, and a remote control signal from a remote control transmitter (not shown) is put on standby in an operating state. When the remote control transmitter is operated and the light detection transistor 9 of the remote control light receiving sensor 2 receives the remote control signal, the signal is adjusted by the waveform shaping circuit 5 through the resistor R1 and input to the input section 12a of the control circuit 6a. The control circuit 6a outputs the output unit 13a so as to turn on the drive transistor Q6 of the drive circuit 21 according to the input signal code (here, the power is turned on).
A control signal is output from the power supply, and the solenoid coil X1 of the power supply primary-side opening / closing means 1 is energized to switch the primary-side opening / closing switch S1 from "open" to "closed". The main power transformer T1, the rectifiers D1, D2, and the smoothing capacitor Power is supplied from the main power supply circuit 10 composed of C2 to the main circuit 15. The main body circuit 15 has a power on / off switch S
Various switches such as S2, S3, S4, etc. and the state of the main circuit 15 are input to the input unit 12a of the control circuit 6a, and the drive circuit 21 and the main circuit 15 are controlled based on the respective operations and states.

[0004]

In such a conventional power supply device, it is required to always supply power to the remote control light-receiving sensor 2 and the control circuit 6a. It is necessary to supply a current by supplying power at all times, and improvement has been urgently required in recent years due to a rise in awareness of energy saving.

An object of the present invention is to provide a power supply unit which is always in a remote control standby state even when no electric current is supplied.

[0006]

According to the present invention, there is provided a power supply device comprising: a power supply primary side opening / closing means capable of opening / closing a primary side of a power supply circuit by an electric means; A remote control light-receiving sensor capable of receiving and detecting an optical signal for remote control emitted from a transmitter, and an output signal when the optical signal is detected by the remote control light-receiving sensor is held for a certain period of time and responds to the held output signal. Driving means for driving the power supply primary-side opening / closing means, a power generating element for generating electromotive force by light energy, and auxiliary power supply means charged by the power generating element, wherein the auxiliary power supply means is provided when the power supply primary-side opening / closing means is opened. The output of the remote control light-receiving sensor to the driving means in the The closing means from the open state is obtained by configured to provide an initial drive power when driving to a closed state.

According to a second aspect of the present invention, in the configuration of the first aspect, a waveform shaping circuit for shaping the waveform of the output signal of the remote control light-receiving sensor, and a remote control control signal whose waveform has been shaped by at least the waveform shaping circuit are input to the circuit. Control means for outputting a control command of the power supply circuit, wherein the waveform shaping circuit and the control means are operable when a predetermined power is supplied from the secondary side of the power supply circuit after the power supply primary side opening / closing means is closed. It is configured so that

A power supply primary-side opening / closing means capable of opening / closing a primary side of a power supply circuit by electrical means, and a remote control capable of receiving and detecting a remote control optical signal emitted from a remote control transmitter. A control light receiving sensor, a driving means for holding an output signal at the time of detecting an optical signal in the remote control light receiving sensor for a certain period of time, and driving the power supply primary-side opening / closing means in response to the held output signal; A power generating element that generates power, an auxiliary power supply that is charged by the power generating element and that can supply constant power to at least the remote control light receiving sensor and the driving means even when the power supply primary side opening / closing means is open, and a remote control light receiving sensor. Waveform shaping the remote control signal And a control means for inputting at least a remote control control signal whose waveform has been shaped by the waveform shaping circuit and outputting a predetermined control command, wherein the auxiliary power supply means receives a remote control light when the power supply primary side opening / closing means is opened. The output of the sensor is enabled, and the driving power from the open state to the closed state of the power supply primary-side opening / closing means is supplied.The waveform shaping circuit and the control means are connected to the power supply circuit after the power supply primary-side opening / closing means is closed. It is configured so that a predetermined power supply is supplied from the secondary side to be operable.

According to the first to third aspects of the present invention, the auxiliary power supply means is always charged by the power generating element, and the auxiliary power supply means is applied only to the remote control light receiving sensor when the remote control is on standby, and almost always has almost no current. When the remote control light does not flow and the remote control light is emitted, the driving means operates and supplies the initial driving power from the open state to the closed state of the power supply primary side opening / closing means by the power supply of the auxiliary power supply means, and then from the secondary side of the power supply circuit Since the power is supplied to the waveform shaping circuit and the control means so as to start the operation, there is no necessity of energization accompanied by current supply, so that an advantageous effect of preventing unnecessary consumption of energy can be obtained.

According to a fourth aspect of the present invention, in the configuration of the second or third aspect, the remote control light-receiving sensor includes a drive power from an open state to a closed state of the power supply primary-side opening / closing means as a light detection transistor constituting the remote control light-receiving sensor. A first light detection transistor for detecting the start of a remote control operation for supplying power, and a second light detection transistor for detecting a remote control control signal after closing the power supply primary-side opening / closing means. The output side of the transistor is connected to the driving means, and the output side of the second light detection transistor is connected to the waveform shaping circuit.

According to a fifth aspect of the present invention, in the configuration of the second or third aspect, the remote control light-receiving sensor is a two-phase output type transistor in which the light detection transistor constituting the remote control light-receiving sensor is open and closed. A first output terminal for detecting the start of remote control operation for supplying drive power from the state to the closed state, and a second output terminal for detecting a remote control signal after closing the power supply primary side opening / closing means. The first output terminal is connected to the driving means and the second output terminal is connected to the waveform shaping circuit. In such a configuration of the fourth or fifth aspect, the output of the remote control light receiving sensor is separated. Therefore, the circuit constant of the input section of the driving means is easily set.

According to a sixth aspect of the present invention, in any one of the first to third aspects, the power generating element is formed integrally with a receiving antenna of a device to which the power supply device supplies power. In some places, such as near a window, where light is easily taken, there is an effect that the receiving sensitivity as an antenna also increases.

According to a seventh aspect of the present invention, in the configuration of any one of the second to fifth aspects, the holding means holds the closed state of the power supply primary-side opening / closing means in response to the output of the control means started to operate after the power supply primary-side opening / closing means is closed. A circuit is further provided, and the power supply primary-side opening / closing means is sensed as a remote control signal and the power supply primary-side opening / closing means is closed, but if the control means determines that the power supply does not need to be turned on, the power supply primary-side opening / closing means is opened. Acts to end the operation.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the auxiliary power supply means is a rechargeable battery, and effectively utilizes the power generated by the power generating element that generates power only when the light energy is high. .

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the power generating element is connected to the auxiliary power supply means via charging current control means for preventing overcharging and preventing backflow. With this configuration, further charging can be prevented when the auxiliary power supply is sufficiently charged, and unnecessary current can be prevented from flowing out of the auxiliary power supply when the power generation of the power generation element is low. .

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a power supply device according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 in FIG. 1 opens and closes the primary side of a transformer T1 by energizing a solenoid coil X1. Power supply primary side opening / closing means, 2 is a remote control light receiving sensor for receiving and detecting a remote control light signal from the remote control transmitter 30, and 3 is holding a signal output for a predetermined time when the remote control light sensor 2 detects a remote control signal. A driving means for driving the power supply primary-side opening / closing means 1 in response to the held signal; and a rechargeable battery 4 serving as an auxiliary power supply means capable of supplying power to the remote control light receiving sensor 2 and the driving means 3 for a certain period of time. 5 is a waveform shaping circuit incorporated in the remote control light receiving sensor 2, and 6 is a remote control circuit. It has an input circuit 12 that receives the output of the control light-receiving sensor 2 and at least the power supply operation switch S2, and sends a control command for controlling the operation of a holding circuit 14 that holds the driving state of the solenoid coil X1 and an operation of the main body circuit 15. A control circuit having an output circuit 13 for outputting, 7 is a solar cell unit which also functions as an antenna stand in which a solar cell 17 and an antenna of a tuner are integrated, and 8 is a charge cell 4 for charging the rechargeable battery 4 from the solar cell 17. An overcharge prevention circuit for controlling the charging current according to the degree of charging and interrupting the current supply as required; 9 is a light detection transistor of the remote control light-receiving sensor 2; 10 is a power supply primary side connection plug 16 by the power supply primary side opening / closing means 1; The mains circuit 15, the control circuit 6, and the waveform shaping circuit 5 are supplied with an AC voltage supplied from the Flow power supply circuit, 1
Reference numeral 1 denotes a diode for supplying power to the rechargeable battery 4 from the main DC power supply circuit 10 energized by the power supply primary-side opening / closing means 1;
Is a holding circuit which is controlled by the control circuit 6 and holds the energized state after energizing the solenoid coil X1 of the power supply primary side opening / closing means 1, and 17 and 18 are a solar cell and a tuner receiving unit incorporated in the solar cell unit 7 serving also as the antenna base. An antenna 19 is a tuner receiving antenna connection terminal provided in the main body circuit 15.

The operation of the power supply device of the present embodiment configured as described above will be described below. The solar cell unit 7 also serves as an antenna base in a place where sunlight is applied, such as near a window. Such a place usually has good reception sensitivity as an antenna since there is no obstacle around the place. When the sunlight shines, a voltage is generated from the solar cell 17. Resistors R11 and R12, diode D according to the potential of solar cell 17
6, a small current flows through the rechargeable battery 4 through D7 and D8. The diodes D6 to D8 are used for setting the ON condition of the transistor Q5 also for temperature compensation, and the number thereof is increased or decreased as necessary. The transistor Q5 is turned on by the potential difference between both ends of the resistor R11, and the voltage generated from the solar cell 17 is the transistor Q5 and the resistor R1.
0, a charging current flows through the charging battery 4 through the diode D5. The voltage of the rechargeable battery 4 is VB, the forward voltage drop of each of the diodes D6 to D8 is VD, the forward voltage drop between the base and the emitter of the transistor Q5 is Vbe, and the solar cell 1
7, the base current of the transistor Q5 flows when VB + 3VD + Vbe <VS, and the collector current corresponding to the DC current amplification factor of the transistor Q5 is charged through the resistor R10 and the diode D5 as the charging current. Pour into

As the charging proceeds and the voltage of the rechargeable battery 4 increases, the current flowing through the resistor R11 also decreases, the potential at both ends decreases, and the ON state of the transistor Q5 cannot be maintained. That is, if the left and right sides of the above equation are equal or the inequality sign is reversed, the transistor Q5 turns off and the rechargeable battery 4
Stop charging. At night, when there is no output or low output from the solar battery 17 such as rainy weather, the backflow from the rechargeable battery 4 is prevented by the diodes D5 to D8 of the overcharge prevention circuit 8.

Next, the remote control transmitter 30
Is input to the light detection transistor 9 of the remote control light-receiving sensor 2. A voltage is constantly applied to the photodetection transistor 9 from the rechargeable battery 4, but almost no current flows when there is no incident light. The light detection transistor 9 is turned on by the input of the optical signal, and the current is supplied from the rechargeable battery 4 and input to the waveform shaping circuit 5 via the resistor R1, but the power is still supplied to the waveform shaping circuit 5. It is not output to the control means 6 because it is not. On the other hand, the driving means 3 integrates the potential at both ends of the resistor R1 at this time by the resistor R2 and the capacitor C1, and smoothes the remote control signal and stores the electric charge stored in the capacitor C1 in the resistor R1.
The transistor Q1 is turned on and held for a certain time with the time constant of 3, R4, and the transistor Q2 is turned on via the resistor R6 from the collector output of the transistor Q1. When the transistor Q2 is turned on, the solenoid coil X1
A current flows from the rechargeable battery 4 to the base of the transistor Q3 for driving the power supply, and the transistor Q3 activates the solenoid coil X1 of the power supply primary-side opening / closing means 1 to close the primary power switch S1. Then, the main DC power supply circuit 10 is activated, supplies power to the main body circuit 15, and supplies a power supply voltage to the waveform shaping circuit 5 and the control means 6,
In addition, a current is supplied to the solenoid coil X1 via the diode 11, and the rechargeable battery 4 is charged.

The remote control signal from the remote control transmitter 30 is a signal according to a predetermined operation code, and the same code is continuously issued a plurality of times. The control signal is input to the waveform shaping circuit 5 which has been activated as described above, and is output from the waveform shaping circuit 5 to the input circuit 12 of the control means 6 which has been activated. The input circuit 12 of the control means 6 receives power supply operation switch S2, various operation switches S3, S4, and operation mode detection of the main body circuit 15 in addition to the output of the waveform shaping circuit 5 of the remote control light-receiving sensor 2 according to the input. The main circuit 15 is controlled by the output circuit 13 in accordance with a predetermined operation, the transistor Q4 is turned on via the resistor R9, and the power supply primary side opening / closing means 1 is held in the closed state via the holding circuit 14.

When the driving means 3 operates for the first time, since the control circuit 6 has not been activated yet, the content of the remote control signal incident on the remote control light-receiving sensor 2 has not been discriminated.
Is operated, and the remote control signal which is still continuing with the activation of the control circuit 6 is determined, and the content of the remote control signal does not need to operate the power supply, for example, the power supply is turned off, or an irrelevant light beam or other light is output. In this case, the control circuit 6 does not issue a command to the holding circuit 14 and cannot hold the signal. Therefore, the switch S1 of the power supply primary-side opening / closing means 1 that has been operated once is not available. Is opened again to end the operation.

When a remote control signal (here, "power off") is input with the power supply primary-side opening / closing means 1 closed, or when the power supply operation switch S2 is closed and input to the input circuit 12 of the control means 6, an output circuit 13 is provided. Turns off the transistor Q4 to release the holding state, and the solenoid coil X1
, The primary power switch S1 is turned off from the closed state, the power supply to the main DC power supply circuit 10 is stopped, and the light detection transistor 9 is in a standby state until it detects the presence or absence of a remote control signal. Diode D3
Is for turning on the transistor Q2 when the power supply operation switch S2 is turned on in the above remote control standby state, and D4 is for backflow prevention. Q2
Is turned on, the power supply primary-side opening / closing means 1 is started to be closed by the driving means 3, the main DC power supply circuit 10 is operated in the same manner as in remote control, and power is supplied to the control means 6 and others.

As described above, according to the present embodiment, when the rechargeable battery 4 is charged in advance by the solar cell 17 and the power supply primary side opening / closing means is closed from the remote control standby state, it is an auxiliary power supply means. Since the initial drive power is supplied by the power stored in the rechargeable battery, an advantageous effect that it is not necessary to constantly supply a current for standby is obtained.

(Embodiment 2) FIG. 2 is a block diagram showing a second embodiment of the power supply device according to the present invention. In the remote control light receiving sensor 2a of FIG. 2, reference numeral 9a denotes an open state of the power supply primary side opening / closing means. A first light detection transistor connected to output to the driving means 3 for detecting a remote control input for supplying driving power from the first to the closed state;
9b is a second photodetection transistor connected to output to the waveform shaping circuit 5 via a resistor R10 for detecting a remote control signal after the power supply primary-side opening / closing means 1 is closed. On the other hand, the configuration is such that the remote control signal output is separated into the driving means 3 and the waveform shaping circuit 5 by two transistors. Other parts having the same functions as those in FIG.

As described above, according to the present embodiment, since the remote control signal can be separated into the driving means 3 and the waveform shaping circuit 5 by the two transistors, the setting of the integration circuits R2 and C1, which are the input parts of the driving means 3, can be freely set. More and more
The light receiving sensor portion composed of the second optical transistor 9b, the resistor R10, and the waveform shaping circuit 5 can use a general remote control light receiving sensor element.
When the power supply primary side opening / closing means 1 is closed from the remote control standby state in the same manner as in the embodiment, the initial drive power is supplied by the power stored in the rechargeable battery serving as the auxiliary power supply means. An advantageous effect that there is no need to constantly supply a current is obtained.

(Embodiment 3) FIG. 3 is a block diagram showing a third embodiment of a power supply device according to the present invention. In FIG. 3, reference numeral 9c denotes a two-phase output type light detection provided in a remote control light receiving sensor 2b. A transistor is shown. In the circuit of FIG. 2, one output terminal of the two-phase output type photodetection transistor 9c is used as the driving means 3 similarly to the first photodetection transistor 9a, and the other is used as the second phototransistor 9b. Is connected to the waveform shaping circuit 5 via a resistor R11. Other parts having the same functions as those in FIG.

As described above, according to the present embodiment, the remote control signal can be separated into the driving means 3 and the waveform shaping circuit 5 by using the two-phase output type photodetecting transistor. Circuit R2, C1
When the power supply primary-side opening / closing means 1 is closed from the remote control standby state as in the first embodiment, the power stored in the rechargeable battery serving as the auxiliary power supply means can be increased. Since the initial drive power is supplied, there is an advantageous effect that there is no need to constantly supply a current for standby.

In each of the above embodiments, the power supply to the main power supply circuit is opened / closed by the switch S1 by energizing the solenoid coil X1, but this may be achieved by using a semiconductor element as the power supply primary side opening / closing means. No problem. Although a rechargeable battery is used as the auxiliary power source, a large-capacity capacitor or an electric double layer element may be used instead of the rechargeable battery.

[0030]

As described above, the power supply device of the present invention has the advantageous effects of preventing unnecessary consumption of energy since the power supply device according to the first to third aspects does not need to be energized with current supply at all times. Can be

According to the fourth or fifth aspect, the output of the remote control light receiving sensor is separated, so that the circuit constant of the input section of the driving means can be easily set.

Further, according to the structure of the sixth aspect, if the power generating element is arranged in a place where light can be easily taken, such as near a window, the effect that the receiving sensitivity as an antenna can be increased at the same time can be obtained.

Further, according to the configuration of claim 7, if the incident light signal does not need to be turned on, the operation can be completed by opening the power supply primary side opening / closing means.

In the configuration of claim 8, the power generated by the power generating element that generates power only when the light energy is high can be effectively used by the configuration of any one of claims 1 to 7.

Further, according to the ninth aspect, when the auxiliary power supply is sufficiently charged, further charging is prevented.
When the power generated by the power generating element is low, unnecessary current can be prevented from flowing out of the auxiliary power supply means.

[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 block diagram of a power supply device according to a second embodiment.

FIG. 3 is a block diagram of a power supply device according to a third embodiment.

FIG. 4 is a block diagram of a conventional power supply device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 power supply primary side opening / closing means 2, 2 a, 2 b remote control light receiving sensor 3 driving means 4 rechargeable battery 5 waveform shaping circuit 6 control means 7 solar cell unit also serving as antenna base 8 overcharge prevention circuit 9, 9 a, 9 b, 9 c light detection transistor Reference Signs List 10 Main DC power supply circuit 11 Diode 12 Input circuit of control means 6 13 Output circuit of control means 6 Holding circuit 15 Main circuit 17 Solar cell 18 Tuner receiving antenna 19 Tuner receiving antenna connection terminal

Claims (9)

[Claims] 1. A power supply primary-side opening / closing means capable of opening / closing a primary side of a power supply circuit by electric means, and a remote control light-receiving sensor capable of receiving and detecting a remote control optical signal emitted from a remote control transmitter. A driving unit for holding an output signal at the time of detecting an optical signal in the remote control light-receiving sensor for a certain period of time and driving the power supply primary-side opening / closing unit in response to the held output signal; A power generating element; and an auxiliary power supply that is charged by the power generating element. The auxiliary power supply enables output of the remote control light-receiving sensor to the drive unit when the power supply primary-side opening / closing unit is opened. And the driving means drives the power supply primary side opening / closing means from an open state to a closed state. Initial power apparatus characterized by being configured to supply the driving power in that. 2. A waveform shaping circuit for shaping a waveform of an output signal of a remote control light-receiving sensor, and control means for inputting at least a remote control signal shaped by the waveform shaping circuit and outputting a predetermined control command. Further, the waveform shaping circuit and the control means are configured such that a predetermined power supply is supplied from the secondary side of the power supply circuit after the power supply primary-side opening / closing means is in a closed state, and the circuit is operable. The power supply device according to claim 1, wherein 3. A power supply primary-side opening / closing means capable of opening / closing a primary side of a power supply circuit by electrical means, and a remote control light-receiving sensor capable of receiving and detecting a remote control optical signal emitted from a remote control transmitter. A driving unit for holding an output signal at the time of detecting an optical signal in the remote control light-receiving sensor for a certain period of time and driving the power supply primary-side opening / closing unit in response to the held output signal; A power generating element, an auxiliary power supply that is charged by the power generating element and that can supply constant power to at least the remote control light receiving sensor and the driving means even when the power supply primary side opening / closing means is in an open state, and the remote control light receiving sensor Waveforms the detected remote control signal A waveform shaping circuit; and control means for inputting at least a remote control control signal whose waveform has been shaped by the waveform shaping circuit and outputting a predetermined control command, wherein the auxiliary power supply means is configured to open and close the power supply primary side opening / closing means. And outputs drive power from an open state to a closed state of the power supply primary-side opening / closing means, and supplies the waveform shaping circuit and the control means with a power supply primary-side opening / closing means in a closed state. A power supply circuit configured to be operable by receiving a predetermined power supply from a secondary side of the power supply circuit after the power supply circuit is turned on. 4. A remote control light-receiving sensor for detecting start of a remote control operation for supplying drive power from an open state to a closed state of a power supply primary-side opening / closing means as a light detection transistor constituting the remote control light-receiving sensor. A first light detection transistor and a second light detection transistor for detecting a remote control signal after closing the power supply primary side opening / closing means; and an output side of the first light detection transistor connected to a driving means; 4. The power supply device according to claim 2, wherein an output side of the second photodetector transistor is connected to a waveform shaping circuit. 5. The remote control light-receiving sensor according to claim 1, wherein the light detection transistor constituting the remote control light-receiving sensor is a two-phase output transistor, and supplies drive power from an open state to a closed state of the power supply primary-side opening / closing means. A first output terminal for detecting the start of remote control operation and a second output terminal for detecting a remote control control signal after the power supply primary side opening / closing means is closed, and the first output terminal is connected to driving means. 4. The power supply device according to claim 2, wherein said second output terminal is connected to a waveform shaping circuit. 6. The power supply device according to claim 1, wherein the power generation element is formed integrally with a receiving antenna unit of a device to which the power supply device supplies power. 7. The power supply system according to claim 2, further comprising a holding circuit for holding a closed state of the power supply primary-side opening / closing means in response to an output of the control means started to operate after the power supply primary-side opening / closing means is closed. Power supply. 8. The auxiliary power supply means is a rechargeable battery.
The power supply device according to any one of claims 1 to 7. 9. The power supply according to claim 1, wherein the power generation element is connected to auxiliary power supply means via charging current control means for preventing overcharging and preventing backflow. apparatus.