JP4123389B2 - Plasma television - Google Patents

Description

  The present invention relates to a plasma television, and more particularly to a plasma television having a substrate configuration in which a drive power generation circuit for driving a plasma panel is divided and mounted on a plurality of substrates.

  FIG. 4 is a block diagram of a conventional driving power supply circuit. A conventional power supply circuit 1 includes a rectifier circuit 3, a power factor correction circuit 4, a transformer 5, and a DC / AC converter 6. The AC power supplied from the commercial power supply 2 through the outlet is converted into direct current by the rectifier circuit 3. After the conversion to, the power factor is improved so that the power factor is close to 1 by the power factor correction circuit 4. Thereafter, a constant-voltage power source is generated by a DC / AC converter via a transformer and output to a drive circuit 13a that drives the plasma panel 12.

  The power factor correction circuit 4 is also called an active filter, and acts to bring the power factor that is the value of active power / apparent power close to 1 by the switching action of the choke coil 4a and the transistor 4b. Since the power factor correction circuit 4 is arranged on the primary side with the transformer 5 in between, it is necessary to consider safety such as heat generation when selecting elements to be used such as the choke coil 4a used in the power factor correction circuit 4 Therefore, it is necessary to be designed exclusively according to the power source to be used.

  In the DC / AC converter 6, the voltage is increased or decreased by a switching action of a MOSFET or the like. In the booster circuit, a drive voltage (180 to 200 volts), a reset voltage (210 to 230 volts) and a sustain voltage (160 to 180 volts) are generated. In the decompression circuit, decompression is performed by a switching action and a dropper method, and a scanning voltage (60 to 80 volts) and an address voltage (60 to 80 volts) are generated.

  The driving voltage is a voltage for starting plasma emission of the plasma panel. The sustain voltage is a voltage for maintaining the plasma emission emitted by the driving voltage. The address voltage is applied to the address electrode corresponding to each pixel of the plasma panel, and the scan voltage is a voltage to be applied to the scan electrode. The reset voltage is for stopping the application of the scanning voltage, and the horizontal scanning of the plasma panel is realized using the address voltage, the scanning voltage, and the reset voltage.

  The starting voltage, the scanning voltage, and the reset voltage described above vary depending on the size of the plasma panel to be used, and the voltage to be used varies depending on the manufacturer. Therefore, when generating the drive power supply, the scanning power supply, and the reset power supply through the power factor correction circuit, the power factor improvement circuit 4 is designed in anticipation of the capacity of the power supply of the plasma panel of each company to be used. There was a need to do.

  Furthermore, some of the plasma panels to be used have a combination of circuits for generating the above-mentioned start power supply, scanning power supply, and reset power supply on the plasma panel side from the beginning. It was necessary to redesign the circuit.

As a method of using plasma panels with different driving voltages on the same substrate, a method is disclosed in which the power supply circuit is divided into a main power supply substrate and a sub power supply substrate, and the sub power supply substrate is rearranged to cope with the difference in the drive voltage. (For example, refer to Patent Document 1).
Utility model registration No. 3131228

  The invention of Patent Document 1 described above has the following problems. That is, the capacity of the power factor correction circuit accompanying the change of the driving power source of the plasma panel is not taken into consideration. Further, since the main power supply substrate and the sub power supply substrate are divided, the power supply lines for supplying the drive power from the main power supply substrate and the sub power supply substrate to the driving circuit of the plasma panel are naturally divided. For this reason, the handling of the power line has become messy.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a plasma television using a power supply circuit that can cope with a change in driving voltage accompanying a change in plasma panel without increasing the capacity of the power factor correction circuit. And

In order to solve the above-mentioned problem, in the invention according to claim 1 of the present invention, pixels filled with a substance that emits light by an applied voltage are arranged in a matrix, a plasma panel that displays an image, and a speaker that outputs sound And a digital board that selects a frequency band corresponding to a predetermined program from the television broadcast received by the antenna, generates a video signal and an audio signal based on the selected television broadcast, and the plasma based on a commercial power source. An address power source for driving the panel, a sustain power source, a reset power source, a scan power source, a power source substrate for generating a startup power source, and a box shape having a concave portion for accommodating the plasma panel, the concave portion The plasma panel is screwed to the top and the digital board and power supply board are fixed to the back of the plasma panel. In a plasma television comprising: a main frame to be screwed, a main frame to which the plasma panel, the digital board, and the power supply board are screwed, and a housing for housing the speaker.
The power supply board converts the commercial power supply into direct current by a rectifier circuit, converts the power factor by a power factor correction circuit, and generates an address power supply based on the power supply converted from the power factor. A sustain power generation unit for generating a sustain power, a main power supply board having a first output terminal for outputting the address power supply and the sustain power supply to the driving circuit of the plasma panel, and a rectifier circuit of the main power supply board Supply the generated DC power from the second output terminal, generate the reset power based on the supplied DC power, the scan power generator that generates the scan power, and the startup power And a sub power supply generation circuit having a third power output terminal for outputting the start power supply to the drive circuit. ,
In the main frame, when the main power supply board and the sub power supply board are screwed adjacently so as to have the same thickness on the back surface of the plasma panel, the first output terminal and the third output terminal The main power supply board has a first base extending in the same thickness from one side adjacent to the sub power supply board, so that power supply lines for supplying drive power to the drive circuit connected together are bundled together, A second base extending from the first base at a predetermined interval, the first output terminal is disposed on the second base, and the sub power supply board A third base portion having the same thickness extending from one side adjacent to the main power supply substrate of the sub power supply substrate so as to be inserted between the base portion and the second base portion, and arranging the third output terminal; It is set as the structure which has.

  The invention according to claim 1 configured as described above is an invention relating to a power supply board of a plasma television comprising a plasma panel, a speaker, a digital board, a power supply board, a main frame, and a housing. The power supply board includes a main power supply board, a sub power supply board, and a sub power supply board so that the power supply circuit can be used without changing the capacity of the power factor correction circuit even when a plasma panel having different voltage values of the scan power supply, the start power supply, and the reset power supply is used. The drive power generated by is divided and generated. The main power supply board converts the commercial power supply into direct current with a rectifier circuit, then converts the power factor with a power factor correction circuit, and generates an address power supply based on the power supply converted with the power factor. And a sustain power generator for generating a sustain power, and a first output terminal for outputting the address power and the sustain power to the plasma panel drive circuit. The sub power supply board supplies a DC power generated from the rectifier circuit of the main power supply board from a second output terminal, and generates a reset power based on the supplied DC power, and a scan power supply And a third output terminal that outputs the reset power, the scan power, and the startup power to the drive circuit.

  In addition, when the main power supply board and the sub power supply board are screwed adjacent to each other so as to have the same thickness on the back surface of the plasma panel in the main frame, the first output terminal and the third output The locations where the first output terminal and the third output terminal are arranged on each substrate are devised so that the power supply lines connected to the terminals and supplying the driving power to the driving circuit are bundled. The main power supply board has a first base part having the same thickness extending from one side adjacent to the sub power supply board and a second base part extending from the first base part with a predetermined interval. The first output terminal is disposed on the second base. The sub power supply board has a third base part that extends in the same thickness from one side adjacent to the main power supply board of the sub power supply board so as to be inserted between the first base part and the second base part. is doing. As a result, it is possible to bundle together the power supply lines that supply the drive power output from the first output terminal and the third output terminal to the drive circuit.

Further, as one aspect of the present invention, after converting the commercial power source to the AC stabilized power source, an address power source for driving the plasma panel, a sustain power source, a reset power source, a scan power source, and a startup power source are generated. In a plasma television that drives a plasma panel based on the generated stabilized power supply, a rectifier circuit that converts the commercial power supply into direct current, a power factor correction circuit that converts the power factor, and an address power supply are generated. A main power supply board having an address power supply generation unit and a sustain power supply generation unit for generating a sustain power supply, a reset power supply generation unit for generating a reset power supply based on a DC power supply generated from the rectifier circuit, and a scan power supply a scan power generation unit to be generated, a configuration and a sub power supply generating circuit composed of a starting power supply generator for generating an activation power Good.

In the configuration the flop plasma television as described above, after converting the commercial power into AC stabilized power supply, the address power source for driving a plasma panel, a sustain power supply, and a reset power source, and a scan power source, start The power source is generated, and the plasma panel is driven based on the generated stabilized power source. The power supply board includes a main power supply board and a sub power supply board. The main power supply board includes a rectifier circuit that converts the commercial power supply into direct current, a power factor correction circuit that converts power factor, and an address power supply. An address power generation unit for generating and a sustain power generation unit for generating a sustain power source are included. The sub power supply board is based on the direct current power generated from the rectifier circuit, the reset power generation unit that generates the reset power, the scan power generation unit that generates the scan power, and the start power generation unit that generates the start power Consists of

Preferably , the main power supply substrate and the sub power supply substrate are a box-shaped main frame having a recess for fixing the plasma panel, and have the same thickness on the back surface of the plasma panel. The main power supply board is fixed to the main power supply board and the sub power supply board, and the main power supply board is arranged to bundle the power supply lines for supplying the power output from the sub power supply board to the plasma panel. A first base portion extending from one side adjacent to the power supply substrate and providing an output terminal for supplying the address power source and the sustain power source to the plasma panel, and a predetermined distance from the first base portion. An output terminal for outputting the reset power, scan power, and start-up power when the sub power board is fixed adjacent to the main power board. Even but a structure having a third base portion same as extending the thickness from one side adjacent to the main power supply board of the sub power board to insert between the first base and the second base portion Good .

In inventions constructed as described above, and the main power supply board, when secured adjacent to the same thickness at the back on the main frame of the plasma panel and the sub-power supply board, the main In order to bundle together power supply lines for supplying power output from the power supply substrate and the sub power supply substrate to the plasma panel, the positions of output terminals arranged on each substrate are devised. The main power supply board has an output terminal for supplying the address power supply and the sustain power supply to the plasma panel on a first base extending from one side adjacent to the sub power supply board. The sub power supply board includes the main power supply board of the sub power supply board so that an output terminal for outputting the reset power supply, the scan power supply, and the start power supply is inserted between the first base and the second base. It arrange | positions at the 3rd base part extended in thickness from the adjacent one side. As a result, the distance between the output terminals can be reduced, and the power supply lines can be bundled together.

Further preferably, the main power supply board may be configured such that an output terminal for supplying a power supply voltage divided from the rectifier circuit to the sub power supply board is arranged on the second base.

In inventions constructed as described above, the main power supply board is connected via the output terminal and the sub-power supply board, supplying the power supply voltage obtained by dividing from the rectifier circuit at the output terminal to the sub power supply board To do.

As described above, according to the present invention, the power supply circuit can easily change the substrate configuration of the power supply circuit according to the drive power to be specified without increasing the capacity of the power factor correction circuit by changing the plasma panel. A plasma television using can be provided.
Further, according to the present invention, the main power supply board and the sub power supply board are shaped so as to be combined with each other, and the output terminals for supplying the drive power are arranged on the combined substrate, so that the power supply line is messy. Can be bundled without doing.
According to the third aspect of the invention, since the power source divided from the rectifier circuit is supplied to the sub power source substrate via the output terminal, the sub power source substrate can be replaced with a simple action.
Furthermore, it is needless to say that in a more specific configuration as in claim 1, the same effects as those of the inventions of claims 2 and 3 described above are exhibited.

Hereinafter, embodiments of the present invention will be described in the following order.
(1) Configuration of plasma television (2) Configuration of main power supply substrate (3) Configuration of sub power supply substrate (4) Summary

(1) Configuration of plasma television
Hereinafter, a first embodiment of a plasma television according to the present invention will be described with reference to FIG. FIG. 1 shows a schematic configuration of a plasma television according to an embodiment of the present invention. In the figure, a plasma television 10 includes a plasma panel 13, a video signal processing circuit 14c, a tuner 14b, an audio signal processing circuit 14d, a digital board 14 on which a microcomputer 14a is mounted, and a main power supply board (main power supply circuit) 16. And a sub power source substrate (sub power source circuit) 17, a plasma panel 13, a box-shaped main frame 12 for screwing the power source substrate 7, a speaker 15 for outputting sound, It is the structure which has the housing 11 which accommodates said each element.

  The outline and function of the plasma television 10 will be described below. The tuner 14b receives television radio waves from an external antenna 14e, and selects a predetermined program by extracting a video signal or the like from a television broadcast in a frequency band designated by the microcomputer 14a. Further, the tuner 14b performs chroma control for generating a video signal for displaying video and an audio signal for outputting audio based on the received television broadcast.

The video signal processing circuit 14c generates a digital video signal based on the video signal input from the tuner 14b. The digital video signal generated by the video signal processing circuit 14c is input to a drive circuit 13a provided in the plasma panel 13, and a drive signal for the plasma panel 13 is generated by the drive circuit 13a. With the above configuration, an image based on television radio waves can be reproduced on the plasma panel 13. Of course, not only the TV image received by the antenna 14e but also a TV image by CATV may be reproduced, or a video signal input from an external device such as a DVD video deck may be reproduced. The video signal processing circuit 14c only needs to support each signal format, and the television radio wave input to the tuner 14b may be in a digital format or an analog format.

The plasma panel 13 arranges pixels filled with a substance that emits light according to an applied voltage in a matrix and displays an image. The power supply board 7 is composed of a main power supply board 16 and a sub power supply board 17, and a drive power supply 13 a is a sustain power supply, an address power supply, a start-up power supply, a reset power supply, and a scan power supply necessary for driving the plasma panel 13. To supply. The main power supply board 16 inputs sustain power and address power to the drive circuit 13a. The sub power supply board 17 inputs reset power, start power, and scanning power as sub power to the drive circuit 13a. The sustain power source, the address power source, and the scan power source are respectively supplied to the sustain electrode, the address electrode, and the scan electrode in the pixel provided in the plasma panel 13. In the plasma panel 13 according to the present embodiment, a surface discharge method in which discharge is generated in the direction of the display surface of the plasma panel 13 by applying a pulse voltage between the scan electrode and the sustain electrode in the cell in which preliminary discharge is performed by the address electrode. Adopted. On the other hand, the reset power source and the startup power source are used for erasing the residual charge of the cell.

(2) Configuration of Main Power Supply Board The main power supply board 16 will be described below. FIG. 2 is a diagram showing the main power supply board 16 and the sub power supply board 17 that are screwed to the main frame 12. FIG. 3 is a schematic configuration diagram of the main power supply board 16 and the sub power supply board 17. As shown in FIG. 2, the main power supply board 16 has a shape having a first base portion 16a and a second base portion 16b. The second base portion 16b extends from one side adjacent to the sub power supply substrate 17 and has a first output terminal 20 for supplying address power and sustain power to the drive circuit 13a. The second base portion 16b is shaped to extend from the first base portion 16a with a predetermined interval. Both ends of the main power supply board 16 have holes 16c and 16d for screwing to the main frame 12, and are fixed by screwing to bosses on the main frame 12 side.

  The circuit mounted on the main power supply board 16 includes a rectifier circuit 3 for converting the commercial power source 2 input from an outlet into a direct current, a power factor improving circuit 4 for converting the power factor, and an address power source for generating an address power source. A generation unit 6a and a sustain power generation unit 6b that generates a sustain power. The commercial power source 2 input from the outlet is converted into a direct current by the action of a thyristor mounted on the rectifier circuit 3 and output to the power factor correction circuit 4. The power supply voltage input to the power factor correction circuit 4 is improved so that the power factor approaches 1 based on the switching action of the choke coil 4a and the transistor 4b. The power supply voltage whose power factor is improved by the power factor improving circuit 4 is applied to the primary coil 18 a of the first transformer 18. In the secondary side coil 18b of the first transformer 18, the divided voltage is output to the address power source generating unit 6a that generates the address power source and the sustain power source generating unit 6b.

  The address power supply generation unit 6a is a DC / AC converter that generates a 200-volt AC voltage by switching control using a MOSFET, and generates an address voltage that is constant at 200 volts by switching control. The sustain power generation unit 6b is a DC / AC converter that generates a 15-volt AC by switching control using a MOSFET, and generates a constant-pressure sustain power. The drive power generated by the address power generator 6a and the sustain power generator 6b is output to the first output terminal 20 and output to the drive circuit 13a of the plasma panel 13.

  Further, the main power supply board 16 has a feedback circuit 25. The feedback circuit 25 has the secondary coil 18b of the first transformer 18 and the other end connected to the primary coil 18a. When the voltage of the secondary coil 18b becomes a high voltage, the feedback circuit 25 A high voltage is detected and feedback control is performed so that the voltage of the primary side coil approaches a normal value.

(3) Configuration of Sub Power Supply Board The sub power supply board has a shape having a third base portion 17a. When the third base 17a is screwed to the main frame 12 adjacent to the main power supply board 16, the sub power supply is inserted between the first base 16a and the second base 16b of the main power supply board 16. The substrate 17 has the same thickness extending from one side adjacent to the main power supply substrate 16. In addition, the third base portion 17a is provided with a second output terminal 21 that supplies a startup power source, a reset power source, and an address power source, which will be described later, to the plasma panel 13. Like the main power supply board 16, second holes 7b, 7c, 7d, and 7e for screwing to the main frame 12 are formed at both ends of the sub power supply board 17, and the bosses and screws on the main frame 12 side are formed. Stop. At this time, the third base portion 17a of the sub power supply substrate 17 is arranged to be inserted between the first base portion 16a and the second base portion 16b of the main power supply substrate 16.

  The sub power supply board 17 mounts a reset power generation unit 6c that generates reset power, a scan power generation unit 6d that generates scan power, and a startup power generation unit 6e that generates startup power. The DC power source rectified by the rectifier circuit 3 of the main power supply substrate 16 is divided and applied to the primary coil 19 a of the second transformer 19. The secondary coil 19 b of the second transformer 19 divides the power supply voltage and outputs it to the third output terminal 22. The reset power generation unit 6c and the scan power generation are performed by dividing the power supply voltage output from the secondary coil 19b of the second transformer 19 from the input terminal 24 connected to the third output terminal 22 on the sub power supply substrate 17 side. Output to the unit 6d and the startup power generation unit 6e.

  The reset power generation unit 6 c functions as a DC / AC converter that converts a DC power supply voltage input via the input terminal 24 into a 200-volt AC power supply, and drives the plasma panel 13 via the second output terminal 21. A reset power is output to the circuit 13a. Similarly, the scan power supply generation unit 6d and the start-up power supply generation unit 6e are also a DC / AC converter that generates a scan power supply and an start-up power supply that are AC power supplies, and a drive circuit 13a for the plasma panel 13 via the second output terminal 21. Output to. At this time, since the main power supply substrate 16 and the sub power supply substrate 17 are insulated by the second transformer 19 and connected via the input terminal 24, the sub power supply substrate 17 is driven by the plasma panel 13. It is possible to easily switch according to the power usage setting.

  As shown in FIG. 2, when the main power supply board 16 and the sub power supply board 17 are screwed to the main frame 12, the drive power output from the power supply circuit 1 constituted by the main power supply board 16 and the sub power supply board 17 is the first The output terminal 20 and the power supply line 23 connected to the second output terminal 21 are output to the drive circuit 13 a of the plasma panel 13. At this time, the first output terminal 20 and the second output terminal 21 are arranged so as to be substantially in a straight line in the vicinity where the main power supply board 16 and the sub power supply board 17 are adjacent to each other. For this reason, the power supply line connectors 23a and 23b connected to the first output terminal 20 and the second output terminal 21 can be arranged relatively close to each other, and the power supply line 23 can be combined without making it complicated. Become.

Further, when connecting to the plasma panel 13 that does not require the startup power supply, the scan power supply, and the reset power supply generated by the sub power supply board 17, the screws for fixing the sub power supply board 17 and the main frame 12 are removed, and the sub power supply board 17 is removed. Is removed from the main frame 12, and the first output terminal 20 and the drive circuit 13 a of the plasma panel 13 are connected via the power line 23. Furthermore, when using the plasma panel 13 that is different only in the startup power supply, the scan power supply, and the reset power supply, the sub power supply board 17 corresponding to the startup power supply, the scan power supply, and the reset power supply is connected to the main power supply board 16. That's fine. For this reason, it is possible to sufficiently cope with the change of the startup power supply, the reset power supply, and the scan power supply accompanying the change of the plasma panel 13 only by changing the sub power supply substrate 17. Furthermore, since the power supply voltage supplied to the sub power supply board 17 does not pass through the power factor correction circuit 4, the power factor improvement circuit 4 can be easily designed .

(4) Summary In addition, in order to achieve the above object, the present invention provides an address power source for driving a plasma panel, a sustain power source, a reset power source, a scan, after converting a commercial power source into an AC stabilized power source. In a plasma television that generates a power source and a startup power source and drives a plasma panel based on the generated stabilized power source, a rectifier circuit that converts the commercial power source into a direct current, and a power factor for converting the power factor A reset power supply is generated on the basis of a main power supply board having an improvement circuit, an address power supply generation section for generating an address power supply, a sustain power supply generation section for generating a sustain power supply, and a DC power supply generated from the rectifier circuit. A sub power generation unit comprising a reset power generation unit, a scan power generation unit that generates a scan power source, and a startup power generation unit that generates a startup power source It may be configured with a circuit.

Configuration the flop plasma television as described above, it converts the commercial power to the AC stabilized power supply, the address power source for driving a plasma panel, a sustain power supply, and a reset power source, and a scan power source, start power And the plasma panel is driven based on the generated stabilized power source. The power supply board includes a main power supply board and a sub power supply board. The main power supply board includes a rectifier circuit that converts the commercial power supply into direct current, a power factor correction circuit that converts power factor, and an address power supply. An address power generation unit for generating and a sustain power generation unit for generating a sustain power source are included. The sub power supply board is based on the direct current power generated from the rectifier circuit, the reset power generation unit that generates the reset power, the scan power generation unit that generates the scan power, and the start power generation unit that generates the start power The plasma TV uses a power supply circuit that can easily change the board configuration of the power supply circuit according to the drive power to be specified without increasing the capacity of the power factor correction circuit by changing the plasma panel. John can be offered.

In the present invention, the upper Symbol main power supply board, and the above sub-power supply board, in a box-shaped main frame having a recess for fixing the plasma panel, the same thickness at the back of the plasma panel In order to bundle the power supply lines for fixing the power supply lines that are fixed adjacent to each other and supply the power output from the main power supply board and the sub power supply board to the plasma panel, the main power supply board includes: A first base that extends from one side adjacent to the sub power supply substrate and has an output terminal for supplying the address power and the sustain power to the plasma panel, and has a predetermined distance from the first base. And an output terminal for outputting the reset power, the scan power, and the start power when the sub power board is fixed adjacent to the main power board. Even but a structure having a third base portion same as extending the thickness from one side adjacent to the main power supply board of the sub power board to insert between the first base and the second base portion Good .

In inventions constructed as described above, and the main power supply board, when secured adjacent to the same thickness at the back on the main frame of the plasma panel and the sub-power supply board, the main In order to bundle together power supply lines for supplying power output from the power supply substrate and the sub power supply substrate to the plasma panel, the positions of output terminals arranged on each substrate are devised. The main power supply board has an output terminal for supplying the address power supply and the sustain power supply to the plasma panel on a first base extending from one side adjacent to the sub power supply board. The sub power supply board includes the main power supply board of the sub power supply board so that an output terminal for outputting the reset power supply, the scan power supply, and the start power supply is inserted between the first base and the second base. Since the main power supply board and the sub power supply board are combined with each other, the driving power supply is supplied onto the combined board because it is arranged on the third base part that extends the same thickness from the adjacent side. Therefore, the power supply lines can be bundled without making them messy.

Furthermore, in the present invention, the upper Symbol main power board, an output terminal for supplying the divided power supply voltage from the rectifier circuit to the sub power supply board, may be disposed on the second base.

In inventions constructed as described above, the main power supply board is connected via the output terminal and the sub-power supply board, supplying the power supply voltage obtained by dividing from the rectifier circuit at the output terminal to the sub power supply board Therefore, since the power source divided from the rectifier circuit is supplied to the sub power source substrate via the output terminal, the sub power source substrate can be replaced with a simple action.

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
・ Applying mutually interchangeable members and configurations disclosed in the above embodiments by appropriately changing the combination thereof.− Although not disclosed in the above embodiments, it is a publicly known technique and the above embodiments. The members and configurations that can be mutually replaced with the members and configurations disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and change the combinations and apply them. It is disclosed as.

It is a block block diagram of a plasma television. It is the figure which screwed the main power supply board and the sub power supply board to the main frame. It is a schematic block diagram of a main power supply board and a sub power supply board. It is a figure of the conventional power supply circuit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Power supply circuit, 2 ... Commercial power supply, 3 ... Rectification circuit, 4 ... Power factor improvement circuit, 4a ... Choke coil, 4b ... Transistor, 5 ... Transformer, 6 ... DC / AC converter 6a ... Address power supply generation part, 6b ... Sustain power generation unit 6c Reset power generation unit 6d Scan power generation unit 6e Startup power generation unit 7 Power supply board 10 Plasma plasma 11 Body 12 Main frame 13 Plasma panel 13a Drive Circuit 14: Digital board 14a Microcomputer 14b Tuner 14c Video signal processing circuit 14d Audio signal processing circuit 14e Antenna 15 ... Speaker 16 Main power board 16a First base 16b ... second base, 17 ... sub power supply board, 17a ... third base, 18 ... first transformer, 18a Primary coil, 18b ... Secondary coil, 19 ... Second transformer, 19a ... Primary coil, 19b ... Secondary coil, 20 ... First output terminal, 21 ... Second output terminal, 22 ... First Three output terminals, 23 ... Power line, 24 ... Input terminal, 25 ... Feedback circuit

Claims (3)

A pixel panel filled with a substance that emits light by an applied voltage is arranged in a matrix, and a plasma panel that displays an image;
A speaker that outputs sound;
A digital board that selects a frequency band corresponding to a predetermined program from the television broadcast received by the antenna, and generates a video signal and an audio signal based on the selected television broadcast;
A power supply board for generating an address power supply for driving the plasma panel based on a commercial power supply, a sustain power supply, a reset power supply, a scan power supply, and a startup power supply;
A box shape having a concave portion for accommodating the plasma panel, wherein the plasma panel is screwed to the concave portion, and the digital board and the power supply board are screwed to be fixed to the back surface of the plasma panel. Frame,
In a plasma television comprising a main frame in which the plasma panel, the digital board, and the power supply board are screwed, and a housing that houses the speaker.
The power board is
After converting the commercial power source into direct current with a rectifier circuit, a power factor is converted with a power factor correction circuit, and an address power source generating unit that generates an address power source based on the power source converted with the power factor, and a sustain power source A main power supply substrate having a first output terminal for generating a sustain power generation unit for generating, and outputting the address power source and the sustain power source to the driving circuit of the plasma panel;
A reset power generation unit that supplies a DC power generated from the rectifier circuit of the main power supply board from a second output terminal and generates a reset power based on the supplied DC power, and a scan power that generates a scan power A generation unit, a startup power generation unit that generates a startup power source, a reset power source, a scan power source, and a sub power source generation circuit having a third output terminal that outputs the startup power source to the drive circuit. ,
In the main frame, when the main power supply board and the sub power supply board are screwed adjacent to each other so as to have the same thickness on the back surface of the plasma panel, the first output terminal and the third output terminal So that the power supply line that supplies drive power to the drive circuit connected to the
The main power supply board has a first base part having the same thickness extending from one side adjacent to the sub power supply board and a second base part extending from the first base part with a predetermined interval. And arranging the first output terminal on the second base,
The sub power supply board extends to have the same thickness from one side adjacent to the main power supply board of the sub power supply board so as to be inserted between the first base and the second base.
A plasma television having a third base portion on which the third output terminal is disposed. After converting the commercial power supply to an AC stabilized power supply, an address power supply for driving the plasma panel, a sustain power supply, a reset power supply, a scan power supply, and a start-up power supply are generated. Based on the generated stabilized power supply In plasma televisions that drive plasma panels,
A main power source having a rectifier circuit for converting the commercial power source into direct current, a power factor improving circuit for converting a power factor, an address power source generating unit for generating an address power source, and a sustain power source generating unit for generating a sustain power source A substrate,
Based on the DC power generated from the rectifier circuit, the sub power is configured by a reset power generation unit that generates a reset power, a scan power generation unit that generates a scan power, and a start power generation unit that generates a start power A power generation circuit,
The main power supply board and the sub power supply board are fixed adjacent to each other with a box-shaped main frame having a recess for fixing the plasma panel so as to have the same thickness on the back surface of the plasma panel. ,
In order to bundle the power supply lines for supplying the power output from the main power supply board and the sub power supply board to the plasma panel,
The main power supply board extends from one side adjacent to the sub power supply board and has a first base on which output terminals for supplying the address power supply and the sustain power supply to the plasma panel are disposed, and the first base, A second base extending at a predetermined interval;
When the sub power supply board is fixed adjacent to the main power supply board, an output terminal for outputting the reset power supply, the scan power supply, and the startup power supply is provided between the first base portion and the second base portion. A plasma television , comprising: a third base portion having the same thickness extending from one side adjacent to the main power supply substrate of the sub power supply substrate to be inserted . 3. The plasma television according to claim 2, wherein the main power supply board has an output terminal for supplying a power supply voltage divided from the rectifier circuit to the sub-power supply board on the second base. John.

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