CN102752567B - Television drive device - Google Patents
Television drive device Download PDFInfo
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- CN102752567B CN102752567B CN201210258465.8A CN201210258465A CN102752567B CN 102752567 B CN102752567 B CN 102752567B CN 201210258465 A CN201210258465 A CN 201210258465A CN 102752567 B CN102752567 B CN 102752567B
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Abstract
The invention discloses a television drive device which comprises a board, a switching power circuit and a television drive circuit, wherein the switching power circuit and the television drive circuit are arranged on the board; the switching power circuit comprises an alternating current input circuit, an EMI (Electro-Magnetic Interference) filter circuit, a high-voltage rectifier bridge, a single-path voltage output switching voltage transformer, a flyback conversion circuit and a single-path low-voltage rectifier and filter circuit; the single-path low-voltage rectifier and filter circuit is used for outputting a single-path direct current power supply; and a power output end of the single-path low-voltage rectifier and filter circuit is connected to the television drive circuit through circuit board wiring. According to the television drive device, the switching power circuit and the television drive circuit are configured on the same board by adopting an integrated design, so that the stability of the device is improved, and the cost is reduced.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of television drive device.
Background technology
Existing switching power circuit and the general separate configuration of LCD TV drive circuit are on two boards, and the wire rod (such as acupuncture needle) that passes through of Switching Power Supply board is connected to LCD TV Driver Card, realizes power supply supply.
As shown in Figure 1, be the structural representation of switching power circuit of prior art.Switching power circuit comprise connect successively AC alternating current input circuit, EMI filter circuit, high-voltage rectifier bridge, plurality of voltages output switch voltage transformer and inverse-excitation converting circuit, multichannel lower pressure rectifier filter circuit and supply voltage accessory power outlet.
As shown in Figure 2, be the Switching Power Supply board of prior art and the syndeton schematic diagram of LCD TV Driver Card.LCD TV drive circuit comprises the circuit modules such as power amplifier, display drive circuit, drive circuit for backlight module group, microcontroller chip.The supply voltage accessory power outlet of Switching Power Supply board is connected to LCD TV Driver Card by wire rod, supplies the power supply of 12V, 5V or other magnitudes of voltage to LCD TV drive circuit.
But existing Switching Power Supply board is connected by wire rod with LCD TV Driver Card, complex procedures, and production cost is high, and easily causes the loose contact of contingency.
Summary of the invention
The embodiment of the present invention proposes a kind of television drive device, adopts integrated design by switching power circuit and TV drive circuitry arrangement on same board, improves the stability of device, and reduce costs.
The television drive device that the embodiment of the present invention provides, comprises board, and the switching power circuit be arranged on described board and TV drive circuit; Described switching power circuit is connected to described TV drive circuit by wiring board wiring;
Described switching power circuit comprise connect successively alternating current input circuit, EMI filter circuit, high-voltage rectifier bridge, single channel voltage output switch voltage transformer and inverse-excitation converting circuit, single channel lower pressure rectifier filter circuit; Described single channel lower pressure rectifier filter circuit exports the DC power supply of single channel;
Described TV drive circuit comprises the first dc-dc, voltage stabilizing circuit and micro-control circuit; The power output end of described single channel lower pressure rectifier filter circuit is connected up by wiring board, is connected to the input of described first dc-dc; The output of described first dc-dc is connected with the input of described voltage stabilizing circuit, and the output of described voltage stabilizing circuit is connected with the power input of described micro-control circuit.
Wherein, described single channel lower pressure rectifier filter circuit exports the 12V DC power supply of single channel, and the power output end of described single channel lower pressure rectifier filter circuit is connected up by wiring board, is connected respectively to described power amplifier, LCDs drive circuit and drive circuit for backlight module group.
The television drive device that the embodiment of the present invention provides, adopt integrated design by switching power circuit and TV drive circuitry arrangement on same board, by realizing the connection between switching power circuit and TV drive circuit at wiring board wire laying mode, the dependence wire rod overcoming prior art connects and the shortcoming that causes operation loaded down with trivial details, thus improve production efficiency and reduce production cost, but also stop the phenomenon of contingency loose contact.In addition, switching power circuit of the present invention is that single channel voltage exports, and circuit is simple, and power-supply system is more stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the switching power circuit of prior art;
Fig. 2 is the Switching Power Supply board of prior art and the syndeton schematic diagram of LCD TV Driver Card;
Fig. 3 is the structural representation of the television drive device that the embodiment of the present invention one provides;
Fig. 4 is the electrical block diagram of the television drive device that the embodiment of the present invention two provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
See Fig. 3, it is the structural representation of the television drive device that the embodiment of the present invention one provides.
The television drive device that the embodiment of the present invention provides, comprises board 1, and the switching power circuit 2 be arranged on board 1 and TV drive circuit 3; Switching power circuit 2 is connected to TV drive circuit 3 by wiring board wiring.
The present embodiment adopts integrated design to be configured on same board by switching power circuit 2 and TV drive circuit 3, by realizing the connection between switching power circuit 2 and TV drive circuit 3 at wiring board wire laying mode.Optionally, the board of the television drive device that the present embodiment provides is printed circuit board (PCB) (Printed Circuit Board is called for short PCB).
See Fig. 4, it is the structural representation of the television drive device that the embodiment of the present invention two provides.
Switching power circuit 2 comprise connect successively alternating current input circuit 21, EMI filter circuit 22, high-voltage rectifier bridge 23, single channel voltage output switch voltage transformer and inverse-excitation converting circuit 24, single channel lower pressure rectifier filter circuit 25; Single channel lower pressure rectifier filter circuit 25 exports the DC power supply of single channel.
Preferably, single channel lower pressure rectifier filter circuit 25 exports the 12V DC power supply of single channel.
Concrete, TV drive circuit 3 comprises power amplifier, LCDs drive circuit and drive circuit for backlight module group; The power output end of single channel lower pressure rectifier filter circuit 25 is connected up by wiring board, is connected respectively to power amplifier, LCDs drive circuit and drive circuit for backlight module group.
In addition, TV drive circuit 3 also comprises display screen power supply circuits, voltage conversion circuit, voltage stabilizing circuit, micro-control circuit, chip and other circuit modules.During concrete enforcement, TV drive circuit 3 can be various types of LCD TV drive circuit of the prior art, does not carry out describing in detail bright to the concrete structure of TV drive circuit 3 at this.
In an optional execution mode, as shown in Figure 4, TV drive circuit 3 comprises the first dc-dc 31, voltage stabilizing circuit 32 and micro-control circuit 33; The power output end of single channel lower pressure rectifier filter circuit 25 is connected up by wiring board, is connected to the input of the first dc-dc 31; The output of the first dc-dc 31 is connected with the input of voltage stabilizing circuit 32, and the output of voltage stabilizing circuit 32 is connected with the power input of micro-control circuit 33.
Wherein, the electric pressure converter of the first dc-dc 31 to be output voltages be 5V, voltage stabilizing circuit comprises low pressure difference linear voltage regulator (low dropout regulator is called for short LDO).During concrete enforcement, the first dc-dc 31 exports 5V power supply, after voltage stabilizing circuit voltage stabilizing, is supplied to micro-control circuit.During concrete enforcement, the first dc-dc 31 can also be powered to other circuit module.
In another optional execution mode, as shown in Figure 4, TV drive circuit 3 also comprises the 3rd dc-dc 34; The power output end of single channel lower pressure rectifier filter circuit 25 is connected up by wiring board, is connected to the input of the 3rd dc-dc 34.During concrete enforcement, the 3rd dc-dc 34 is output voltage values electric pressure converters between 1V ~ 12V, such as, export 1.2V, 2.5V, 3.3V, 5V or other voltage, is TV drive circuit 3 each several part circuit or chip power supply.
The television drive device that the embodiment of the present invention provides, adopt integrated design by switching power circuit and TV drive circuitry arrangement on same board, by realizing the connection between switching power circuit and TV drive circuit at wiring board wire laying mode, the dependence wire rod overcoming prior art connects and the shortcoming that causes operation loaded down with trivial details, thus improve production efficiency and reduce production cost, but also stop the phenomenon of contingency loose contact.In addition, switching power circuit of the present invention is that single channel voltage exports, and circuit is simple, and power-supply system is more stable.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (5)
1. a television drive device, is characterized in that, comprises board, and the switching power circuit be arranged on described board and TV drive circuit; Described switching power circuit is connected to described TV drive circuit by wiring board wiring;
Described switching power circuit comprise connect successively alternating current input circuit, EMI filter circuit, high-voltage rectifier bridge, single channel voltage output switch voltage transformer and inverse-excitation converting circuit, single channel lower pressure rectifier filter circuit; Described single channel lower pressure rectifier filter circuit exports the DC power supply of single channel;
Described TV drive circuit comprises the first dc-dc, voltage stabilizing circuit and micro-control circuit; The power output end of described single channel lower pressure rectifier filter circuit is connected up by wiring board, is connected to the input of described first dc-dc; The output of described first dc-dc is connected with the input of described voltage stabilizing circuit, and the output of described voltage stabilizing circuit is connected with the power input of described micro-control circuit;
Described TV drive circuit also comprises power amplifier, LCDs drive circuit and drive circuit for backlight module group;
Described single channel lower pressure rectifier filter circuit exports the 12V DC power supply of single channel, and the power output end of described single channel lower pressure rectifier filter circuit is connected up by wiring board, is connected respectively to described power amplifier, LCDs drive circuit and drive circuit for backlight module group.
2. television drive device as claimed in claim 1, is characterized in that, the electric pressure converter of described first dc-dc to be output voltage be 5V.
3. television drive device as claimed in claim 1, it is characterized in that, described voltage stabilizing circuit comprises low pressure difference linear voltage regulator.
4. the television drive device as described in any one of claims 1 to 3, is characterized in that, described TV drive circuit also comprises the second dc-dc; The power output end of described single channel lower pressure rectifier filter circuit is connected up by wiring board, is connected to the input of described second dc-dc;
Described second dc-dc is the electric pressure converter of output voltage values between 1V ~ 12V.
5. television drive device as claimed in claim 4, it is characterized in that, described board is printed circuit board (PCB).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210258465.8A CN102752567B (en) | 2012-07-25 | 2012-07-25 | Television drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210258465.8A CN102752567B (en) | 2012-07-25 | 2012-07-25 | Television drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102752567A CN102752567A (en) | 2012-10-24 |
| CN102752567B true CN102752567B (en) | 2015-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210258465.8A Active CN102752567B (en) | 2012-07-25 | 2012-07-25 | Television drive device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102752567B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118738Y (en) * | 2007-11-23 | 2008-09-17 | 深圳Tcl工业研究院有限公司 | A sequential switch device for TV and STB power |
| CN102043423A (en) * | 2009-10-21 | 2011-05-04 | 深圳市东方科达电子有限公司 | Layout method for manufacturing liquid crystal integrated computer |
| CN102231266A (en) * | 2011-07-07 | 2011-11-02 | 广州视源电子科技有限公司 | LCD TV (Liquid Crystal Display Television) driving system in modularized splicing mode and controlling method thereof |
| CN202160231U (en) * | 2011-07-07 | 2012-03-07 | 广州视源电子科技有限公司 | Improved LCD TV (Liquid Crystal Display Television) drive system in modularized connection |
| CN202197355U (en) * | 2011-05-04 | 2012-04-18 | 海尔集团公司 | Power supply and driving device used for LED backlight and liquid crystal television comprising the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201667689U (en) * | 2010-03-15 | 2010-12-08 | 深圳市康道电子有限公司 | LED backlight liquid crystal split television |
| CN202050360U (en) * | 2011-03-14 | 2011-11-23 | 广州视源电子科技有限公司 | Electric power supply system |
-
2012
- 2012-07-25 CN CN201210258465.8A patent/CN102752567B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118738Y (en) * | 2007-11-23 | 2008-09-17 | 深圳Tcl工业研究院有限公司 | A sequential switch device for TV and STB power |
| CN102043423A (en) * | 2009-10-21 | 2011-05-04 | 深圳市东方科达电子有限公司 | Layout method for manufacturing liquid crystal integrated computer |
| CN202197355U (en) * | 2011-05-04 | 2012-04-18 | 海尔集团公司 | Power supply and driving device used for LED backlight and liquid crystal television comprising the same |
| CN102231266A (en) * | 2011-07-07 | 2011-11-02 | 广州视源电子科技有限公司 | LCD TV (Liquid Crystal Display Television) driving system in modularized splicing mode and controlling method thereof |
| CN202160231U (en) * | 2011-07-07 | 2012-03-07 | 广州视源电子科技有限公司 | Improved LCD TV (Liquid Crystal Display Television) drive system in modularized connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102752567A (en) | 2012-10-24 |
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