KR940002645B1 - Power supply for multiple home appliances - Google Patents

Abstract

The power supply connects to a combined system integrally composed of a compact disk player, a television, and a video tape recorder. The power supply comprises the following means; a switching mode power supply for generating the main source; a stand-by power supply; a monitor driven by the main source; a compact disk player including a television/a video tape recorder; the first and second control signal generators; a switching circuit for generating the third signal.

Description

Multifunction Home Appliance Power Supply

1 is a block diagram of a power supply for use in a multifunctional household appliance in which a compact disc player, a television and a video tape recorder are integrally formed according to the present invention.

FIG. 2 is a logic diagram of the switching circuit shown in FIG.

3 is a detailed circuit diagram of each power supply unit.

4 is another embodiment of FIG.

* Explanation of symbols for main parts of the drawings

1: Switching mode power supply 2: Monitor power supply

3: compact disc player power supply 4: video tape recorder power supply

5: standby power supply unit 6: microcomputer

9: switching circuit 9A, 9B: inverter

9C to 9F: Andgate 9G to 9I: Oagate

10 monitor 11: video tape recorder

12: compact disc player unit

The present invention relates to a power supply for a multifunctional composite home appliance in which a compact disc player, a television and a video tape recorder are integrally formed.

Today's compact disc players, televisions or video tape recorders are sold separately, and each power circuit must be attached separately. That is, since these current home appliances are not integrally formed, it is necessary to configure each power supply circuit with a single power supply.

Accordingly, the present invention has been invented in view of the above circumstances, and an object of the present invention is to provide a power supply device for a multifunctional household appliance in which a power source for driving a compact disc player / video tape recorder / color television integrated product is operated by a single power circuit. There is this.

In order to achieve the above object, the present invention provides a switching mode power supply generating a main power supply, a standby power supply generating a standby power supply by receiving the main power supply, a monitor operated by the main power supply, a compact disc player unit, and a video tape recorder. A power supply device for a compact disc player / television / video tape recorder integrated product having a unit, which is enabled by a standby power supply and receives a key signal from an external source and generates first and second control signals. Wow ; A switching circuit for generating a first to third output signal by logically combining the first and second control signals; A monitor power supply unit operated by receiving a first output signal to provide a main power to the monitor; A compact disc power supply unit receiving a second output signal and providing a main power supply to the compact disc player unit; And a video tape power supply for supplying the main power supply to the video tape recorder by operating by the third output signal.

According to the present invention, the switching circuit comprises a first and second inverters for inverting the first and second control signals, a first end gate for logically combining these inverter outputs, and a logic for outputting the second control signal and the first inverter. A decoder unit comprising a second end gate to be combined, a third end gate to logically combine the outputs of the first control signal and the second inverter, and a fourth end gate to logically combine the first and second control signals; Logically combining the output of the first and second gates and the output of the second and gates to generate a second output signal by logically combining the outputs of the first or gate and the second and third and gates that generate the first output signal. It is preferable to configure an output signal generator comprising a second or gate for generating a third output signal by logically combining the output signals of the first and fourth and gates.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a compact disc player according to the present invention and an integrated power supply unit for a color television and video tape recorder-integrated home appliance. First, if a power plug (not shown) is plugged into an outlet, In the supply 1, a main power supply is simultaneously provided to each of the monitor power supply section 2, the compact disc player power supply section 3, the video tape recorder power supply section 4, and the standby power supply section 5, respectively.

On the other hand, the standby power supply unit 5 always provides standby power to the microcomputer 6, the horizontal power supply unit 7 for turning on / off the monitor, and the audio control and audio amplifier 8.

In FIG. 1, these monitor power supply units 2, compact disc player power supply units 3, and video tape recorder power supply units 4 are switched circuits 9 which are operated by control signals C1 and C2 of the microcomputer 6. As shown in FIG. ) Is under control. Here, the switching circuit 9 outputs the outputs A and C for enabling the monitor power supply unit 2 and the video tape recorder power supply unit 4 when the control signal output from the microcomputer 9 is C1, C2 = 00. When C1, C2 = 01, the signals A and B for operating the monitor power supply unit 2 and the compact disc player power supply unit 3 are set to high state. Only the signal B for operating only the disc player power supply unit 3 is set high, and if C1, C2 = 11, the signal C for operating only the video tape recorder power supply unit 4 is set high. Accordingly, as the switching circuit 9 operates under the control of the microcomputer 6, the television / video tape recorder can be operated and a compact disc can be reproduced. It will be described in more detail with reference to.

2 is a logic diagram of the switching circuit 9 used in the present invention, which generates the output signals A, B, and C according to the state of the control signals C1 and C2 of the microcomputer 6.

First, when the control signals C1 and C2 of the microcomputer 6 are "00", the inverters 9A and 9B generate high signals. In this case, high signals are applied to both input terminals of the AND gate 9C. Therefore, a high signal is output, but the AND gates 9D, 9E, and 9F output a low signal. At this time, since the high output of the AND gate 9C is applied to one terminal of the OR gates 9G and 9I, the OR gates 9G and 9I output high signals and the outputs of the AND gates 9D and 9E. Since is low, the oragate 9H outputs a low signal. Therefore, the high signals A and C generated by the oragates 9G and 9I operate the monitor power supply unit 2 and the video tape recorder power supply unit 4 so that the monitor 10 and the video tape recorder unit 11 operate. Done.

On the other hand, when the control signals C1 and C2 of the microcomputer 6 are "01", the inverter 9A outputs a high signal and the inverter 9B outputs a low signal, and the AND gate 9C outputs a low signal. . In addition, since the control signal C1 is "0", the AND gates 9E and 9F also output a low state signal. However, since the output of the inverter 9A is high and the control signal C2 is also high, only the AND gate 9D generates a high output.

As only the AND gate 9D outputs a high state signal, the oragates 9G and 9H output high signals A and B, and the oragate 9I outputs a low signal. The power supply unit 2 and the compact disc player power supply unit 3 are operated so that the monitor 10 and the compact disc player unit 12 are operable.

When the control signal is C1, C2 = " 10 ", since the output of the inverter 9A is low, the AND gates 9C and 9D generate a low output, and the AND gate 9F also generates a control signal C2. Because it is "0", it produces a low output. However, since the output of the inverter 9B becomes high, the output of the AND gate 9E becomes high. Therefore, since the AND gates 9C, 9D, and (F) all output low signals, the oragates 9G and 9I output low signals, but the oragate 9H is driven by the output of the AND gate 9E in the high state. The output state B is generated in a high state, at which time only the compact disc player power supply unit 3 is operated to make the compact disc player 12 operable.

On the other hand, when the control signal of the microcomputer 6 becomes C1, C2 = " 11 ", the outputs of the inverters 9A and 9B are low, so the AND gates 9C, 9D and 9E both generate low state outputs. However, only the AND gate 9F generates a high output. In this case, therefore, only the output signal C of the oragate 9I goes high, so that only the video tape recorder power supply 4 can operate.

A summary of the above results is shown in Table 1 below. As can be seen from Table 1, when the control signal is C1, C2 = 00, power for reproducing the video tape recorder is supplied. When C1, C2 = 01, the compact disc may be played. In this case, the monitor may display an OSD required for playing the compact. In addition, when C1 and C2 = 01, this means that only the compact disc can be played back (no OSD is displayed on the monitor). When C1 and C2 = 11, the program can be reserved.

FIG. 3 is a detailed circuit diagram of the monitor power supply unit 2, the compact disc player power supply unit 3, and the video tape recorder power supply unit 4 shown in FIG. 1, which are biased when a high signal is applied from the switching circuit 9, respectively. The transistors 22, 32, 42 turned on through the resistors 21, 31, 41, the relay coils 23, 33, 43 and the relay contacts 24, 34,44), respectively.

For example, when the signal A is high, the transistor 22 is turned on by the bias resistor 21, so that a current flows through the relay coil 23. At this time, an electromagnetic force generated by the current is generated in the coil 23. The relay contact 24 is turned on. As the relay contact 24 is turned on, the main power supplied from the switching mode power supply 1 is applied to the monitor 10 through the relay contact 24 of the monitor power supply 2. In FIG. 3, operations of the compact disc player power supply unit 3 and the video tape recorder power supply unit 4 are the same as those of the monitor power supply unit 2. Therefore, detailed description thereof will be omitted.

FIG. 4 shows another embodiment of the monitor power supply unit 2. Although FIG. 4 shows only the monitor power supply unit 2, the compact disc player power supply unit 3 and the video tape recorder power supply unit 4 are also provided with a power supply unit (see FIG. Since the same configuration as 2), the detailed connection configuration thereof is omitted.

In FIG. 4, when the signal A output from the switching circuit 9 is in a high state, the transistor 202 is turned on through the bias resistor 201, and the voltage divided by the resistors 203 and 204 is a transistor. Turn on (205). As the transistor 202 is turned on, the main power output from the switching mode power supply 1 is applied to the monitor 10 through the transistor 205. Here, the diode 206, the zener diode 207, and the capacitor 208 are elements for maintaining a constant voltage.

As described above, the present invention has a feature that a user can operate a desired device by configuring a simple switching circuit that operates with a single power supply in a compact electronic player / television / video tape recorder integrated composite electronic product.

Claims (4)

A compact disc comprising a switching mode power supply for generating a main power supply, a standby power supply for generating standby power by receiving the main power supply, a monitor operated by the main power supply, a compact disc player unit, and a video tape recorder unit, respectively. A power supply for a television / video tape recorder integrated product to a player, comprising: a control signal generator which is enabled by the standby power supply, receives a key signal of an external rotor, and generates first and second control signals; A switching circuit for generating first to third output signals by logically combining the first and second control signals; A monitor power supply unit operated by receiving the first output signal to provide the main power to the monitor; A compact disc power supply unit receiving the second output signal and providing the main power supply to the compact disc player unit; And a video tape power supply unit for supplying the main power supply to the video tape recorder unit by operating by the third output signal. The switching circuit of claim 1, wherein the switching circuit comprises: first and second inverters for inverting the first and second control signals, a first AND gate for logically combining the inverter outputs, and the second control. A second and gate for logically combining the output of the signal and the first invert, a third and gate for logically combining the output of the first control signal and the second inverter, and a fourth for logically combining the first and second control signals. An decoder having an AND gate; Logically combining the outputs of the first and gates and the outputs of the second and gates to generate a second output signal by logically combining the outputs of the first or gate, the second and third and gates that generate the first output signal. And an output signal generator comprising a second oragate for generating a third output signal by logically combining the output signals of the first and fourth and gates. Power supply. 2. The power supply unit of claim 1, wherein each of the power supply units is provided with a transistor operated by the first to third output signals, and a main power supply operated during operation of the transistor to provide a monitor, a compact disc player unit, and a video tape recorder unit, respectively. The power supply of the multi-functional home appliance, characterized in that each of the following relay coil and relay contacts. The multifunctional home appliance of claim 1, wherein the power supply unit comprises a transistor operated by an output signal output from a switching circuit, a transistor for supplying a main power supply to the monitor when the transistor is turned on, and a constant voltage device. Power supply.