CN202652375U - Television power supply system with simple power fail safeguard - Google Patents
Television power supply system with simple power fail safeguard Download PDFInfo
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- CN202652375U CN202652375U CN 201220210934 CN201220210934U CN202652375U CN 202652375 U CN202652375 U CN 202652375U CN 201220210934 CN201220210934 CN 201220210934 CN 201220210934 U CN201220210934 U CN 201220210934U CN 202652375 U CN202652375 U CN 202652375U
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- 238000010586 diagram Methods 0.000 description 4
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Abstract
The embodiment of the utility model discloses a television power supply system with simple power fail safeguard. The television power supply system comprises an AC input module, a filter circuit, a rectification circuit, a switch circuit and a power fail control circuit. The television power supply system is characterized in that the power fail control circuit comprises a first voltage division resistor R1, a second voltage division resistor R2, a first rectifier diode D1, a second rectifier diode D2, a filtering capacitor C1, a first current-limiting resistor R3, an optical coupler N1, a second current-limiting resistor R4, a third voltage division resistor R5 and a triode Q1. The television power supply system enables costs of television hardware to be greatly lowered, and helps to effectively prevent a television against popping or screen flashing when the television is shut down, thereby realizing a purpose of power fail safeguard for the television. Moreover, a circuit structure is optimized and experience for a user to use is enhanced.
Description
Technical field
The utility model relates to the TV power supply field, relates in particular to a kind of TV power supply system with simple and easy power down protection.
Background technology
In the prior art; for the slow problem of the secondary output power down of the switching circuit of TV power supply; many employings increase the mode of a under-voltage protecting circuit at the power pin end of the power panel power source managing chip of TV; avoid TV to produce the problems such as close popping noise or shutdown sudden strain of a muscle screen, thereby reach the purpose of TV being carried out power down protection.
But the circuit structure of above-mentioned under-voltage protecting circuit is comparatively complicated, so that the TV hardware cost is higher, and reaction is sensitive not, has reduced user's experience.
The utility model content
The utility model embodiment technical problem to be solved is, a kind of TV power supply system with simple and easy power down protection is provided, and can effectively solve the slow problem of the secondary output power down of switching circuit according to simple circuit and lower hardware cost.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of TV power supply system with simple and easy power down protection, comprising:
Exchange input module, filter circuit, rectification circuit, switching circuit and power-down control circuit, wherein:
Described power-down control circuit comprises the first divider resistance R1, the second divider resistance R2, the first rectifier diode D1, the second rectifier diode D2, filter capacitor C1, the first current-limiting resistance R3, optocoupler N1, the second current-limiting resistance R4, the 3rd divider resistance R5 and triode Q1, wherein:
Described the first divider resistance R1 links to each other with the anode of described the first rectification diode D1;
Described the first divider resistance R1 links to each other with the negative electrode of described the second rectifier diode D2 by described the second divider resistance R2;
The negative electrode of described the first rectifier diode D1 links to each other with the first pin of described optocoupler N1 by described the first current-limiting resistance R3;
The negative electrode of described the first rectifier diode D1 links to each other with the negative electrode of described the second rectifier diode D2 by described filter capacitor C1;
The anode of described the second rectifier diode D2 links to each other with the crus secunda of described optocoupler N1;
The tripod of described optocoupler N1 links to each other with the collector electrode of described triode Q1, and links to each other with the emitter of described triode Q1 by described the 3rd divider resistance R5;
The 4th pin of described optocoupler N1 is directly exported control signal Out, and connects DC power supply by described the second current-limiting resistance R4.
Further, described the first divider resistance R1 comprises at least two resistance series connection.
Further, described triode Q1 is a NPN type triode.
Further, described power-down control circuit links to each other with the TV main control chip.
Implement the utility model embodiment, have following beneficial effect:
Employing comprises the power-down control circuit of the first divider resistance R1, the second divider resistance R2, the first rectifier diode D1, the second rectifier diode D2, filter capacitor C1, the first current-limiting resistance R3, optocoupler N1, the second current-limiting resistance R4, the 3rd divider resistance R5 and triode Q1; can significantly reduce the TV hardware cost; effectively avoid TV to produce the problems such as close popping noise or shutdown sudden strain of a muscle screen, thereby reach the purpose of TV being carried out power down protection.Optimize circuit structure, promoted user's experience.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the structure with the TV power supply system of simple and easy power down protection of the utility model embodiment forms schematic diagram;
Fig. 2 is that the structure of the power-down control circuit among Fig. 1 forms schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Seeing also Fig. 1, is that the structure with the TV power supply system of simple and easy power down protection of the utility model embodiment forms schematic diagram.Described TV power supply system with simple and easy power down protection comprises: exchange input module 1, filter circuit 2, rectification circuit 3, switching circuit 4 and power-down control circuit 5, wherein,
Described interchange input module 1 links to each other with described filter circuit 2, and described filter circuit 2 links to each other with described switching circuit 4 by described rectification circuit 3, and described filter circuit 2 also links to each other with described power-down control circuit 5.Described optocoupler N1 comprises light-emitting diode and light-emitting diode, and the anode of light-emitting diode is the 1st pin, and negative electrode is the 2nd pin, and the current collection of light-emitting diode is the 4th pin very, and emission is the 3rd pin very.
Further, as shown in Figure 1, described power-down control circuit 5 links to each other with TV main control chip 6.
Described switching circuit 4 connects each TV functions module 7.
See also Fig. 2, be the structure composition schematic diagram of the power-down control circuit among Fig. 1.Described power-down control circuit comprises the first divider resistance R1, the second divider resistance R2, the first rectifier diode D1, the second rectifier diode D2, filter capacitor C1, the first current-limiting resistance R3, optocoupler N1, the second current-limiting resistance R4, the 3rd divider resistance R5 and triode Q1, wherein:
Described the first divider resistance R1 links to each other with the anode of described the first rectification diode D1.
Concrete, described the first divider resistance R1 can comprise at least two resistance series connection.
Described the first divider resistance R1 links to each other with the negative electrode of described the second rectifier diode D2 by described the second divider resistance R2.
The negative electrode of described the first rectifier diode D1 links to each other with the first pin of described optocoupler N1 by described the first current-limiting resistance R3.
The negative electrode of described the first rectifier diode D1 links to each other with the negative electrode of described the second rectifier diode D2 by described filter capacitor C1.
The anode of described the second rectifier diode D2 links to each other with the crus secunda of described optocoupler N1.
The tripod of described optocoupler N1 links to each other with the collector electrode of described triode Q1, and links to each other with the emitter of described triode Q1 by described the 3rd divider resistance R5.
Concrete, described triode Q1 is a NPN type triode.
The 4th pin of described optocoupler N1 is directly exported control signal Out, and connects DC power supply by described the second current-limiting resistance R4.
Concrete, the voltage of described DC power supply is 5V.
Description by above-described embodiment the utlity model has following advantage as can be known:
Employing comprises the power-down control circuit of the first divider resistance R1, the second divider resistance R2, the first rectifier diode D1, the second rectifier diode D2, filter capacitor C1, the first current-limiting resistance R3, optocoupler N1, the second current-limiting resistance R4, the 3rd divider resistance R5 and triode Q1; can significantly reduce the TV hardware cost; effectively avoid TV to produce the problems such as close popping noise or shutdown sudden strain of a muscle screen, thereby reach the purpose of TV being carried out power down protection.Optimize circuit structure, promoted user's experience.
Above disclosed only is the utility model preferred embodiment, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (4)
1. the TV power supply system with simple and easy power down protection comprises exchanging input module, filter circuit, rectification circuit, switching circuit and power-down control circuit, it is characterized in that:
Described power-down control circuit comprises the first divider resistance R1, the second divider resistance R2, the first rectifier diode D1, the second rectifier diode D2, filter capacitor C1, the first current-limiting resistance R3, optocoupler N1, the second current-limiting resistance R4, the 3rd divider resistance R5 and triode Q1, wherein:
Described the first divider resistance R1 links to each other with the anode of described the first rectification diode D1;
Described the first divider resistance R1 links to each other with the negative electrode of described the second rectifier diode D2 by described the second divider resistance R2;
The negative electrode of described the first rectifier diode D1 links to each other with the first pin of described optocoupler N1 by described the first current-limiting resistance R3;
The negative electrode of described the first rectifier diode D1 links to each other with the negative electrode of described the second rectifier diode D2 by described filter capacitor C1;
The anode of described the second rectifier diode D2 links to each other with the crus secunda of described optocoupler N1;
The tripod of described optocoupler N1 links to each other with the collector electrode of described triode Q1, and links to each other with the emitter of described triode Q1 by described the 3rd divider resistance R5;
The 4th pin of described optocoupler N1 is directly exported control signal Out, and connects DC power supply by described the second current-limiting resistance R4.
2. the TV power supply system with simple and easy power down protection as claimed in claim 1 is characterized in that:
Described the first divider resistance R1 comprises at least two resistance series connection.
3. the TV power supply system with simple and easy power down protection as claimed in claim 2 is characterized in that:
Described triode Q1 is a NPN type triode.
4. such as each described TV power supply system with simple and easy power down protection of claim 1-3, it is characterized in that:
Described power-down control circuit links to each other with the TV main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220210934 CN202652375U (en) | 2012-05-11 | 2012-05-11 | Television power supply system with simple power fail safeguard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220210934 CN202652375U (en) | 2012-05-11 | 2012-05-11 | Television power supply system with simple power fail safeguard |
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| Publication Number | Publication Date |
|---|---|
| CN202652375U true CN202652375U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220210934 Expired - Lifetime CN202652375U (en) | 2012-05-11 | 2012-05-11 | Television power supply system with simple power fail safeguard |
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| Country | Link |
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| CN (1) | CN202652375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492865A (en) * | 2017-08-21 | 2017-12-19 | 深圳创维－Rgb电子有限公司 | A kind of alternating current power failure response circuit and electric equipment |
-
2012
- 2012-05-11 CN CN 201220210934 patent/CN202652375U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492865A (en) * | 2017-08-21 | 2017-12-19 | 深圳创维－Rgb电子有限公司 | A kind of alternating current power failure response circuit and electric equipment |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong province Shenzhen city Longhua District Longhua Street Qing Xiang Lu Qing Hu Bao Industrial Park Science and Technology Park 9 A block 17 building E, F unit Patentee after: SHENZHEN HANQIANG TECHNOLOGY CO., LTD. Address before: 19, S-Z, building 518000, block A, Fortune Plaza, 7002 Shennan Road, Guangdong, Shenzhen, Futian District Patentee before: Shenzhen Hanqiang Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |