CN201153295Y - Television standby detection power supply circuit - Google Patents
Television standby detection power supply circuit Download PDFInfo
- Publication number
- CN201153295Y CN201153295Y CNU2008203001646U CN200820300164U CN201153295Y CN 201153295 Y CN201153295 Y CN 201153295Y CN U2008203001646 U CNU2008203001646 U CN U2008203001646U CN 200820300164 U CN200820300164 U CN 200820300164U CN 201153295 Y CN201153295 Y CN 201153295Y
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The utility model relates to a stand-by checking feed circuit, in particular to a television stand-by checking feed circuit which can automatically cut off B positive voltage when a television is in a stand-by state, so as to reduce the stand-by power consumption. The circuit comprises a switching mode power supply, a first rectification circuit, a second rectification circuit and a stand-by checking circuit, and also comprises a logic switching circuit which is connected with the stand-by checking circuit and the first rectification circuit. Through a logic switch controlling the B positive voltage to automatically cut off when the television is in a stand-by state, the stand-by checking feed circuit reduces the stand-by power consumption and is particularly suitable for a digital television.
Description
Technical field
The utility model relates to a kind of machine testing power supply circuits for the treatment of, relates in particular to a kind of television set and treats the machine testing power supply circuits.
Background technology
For the design of television set, low-power consumption also is a technical indicator, and production firms are also always towards this direction effort.Conventional television treat the machine testing power supply circuit as shown in Figure 1, this circuit comprises Switching Power Supply, first rectification circuit, second rectification circuit and standby testing circuit, second rectification circuit input end connects the output winding 2 of Switching Power Supply, and output connects the standby testing circuit; First rectification circuit input end connects the output winding 1 of Switching Power Supply, and output output B+ voltage is other unit power supplies of complete machine; Wherein second rectification circuit comprises capacitor C 2, diode D2, capacitor C 4, and capacitor C 2 is in parallel with diode D2, and diode D2 anode connects Switching Power Supply output winding 2, and negative electrode connects capacitor C 4 positive poles, capacitor C 4 minus earths; First rectification circuit comprises capacitor C 1, diode D1, capacitor C 3, and capacitor C 1 is in parallel with diode D1, and diode D1 anode connects the positive pole that Switching Power Supply output winding 1 negative pole connects capacitor C 3, capacitor C 3 minus earths; The standby testing circuit comprises resistance R 1～resistance R 7, diode D3, triode Q1, triode Q3, pressurizer N1 and photoelectrical coupler N2, triode Q3 collector electrode by diode D3 successively series resistor R6, resistance R 5, resistance R 4, pressurizer N1, resistance R 2, resistance R 3 to its base stage, its grounded emitter; The collector electrode of triode Q1 connects pressurizer N1 by resistance R 7, and its base stage is connected between resistance R 2 and the resistance R 3 by resistance R 1, its grounded emitter; Photoelectrical coupler N2 is in parallel with resistance R 5; Pressurizer N1 connects capacitor C 4 positive poles, and it is output as the power supply of central processing unit (MCU) unit; Triode Q1 is the NPN type.
As can be seen from Figure 1, the Switching Power Supply for the treatment of the machine testing power supply circuits of conventional television aims at MCU one group of power supply winding is provided, the voltage drop when standby of this winding is at half, but after voltage stabilizing, still can guarantee the MCU operate as normal, the B+ voltage of television set adopts independently current supply circuit simultaneously, though television set B+ voltage drop when entering holding state is at half, also power in other unit that are machine system this moment, thereby increased the stand-by power consumption of complete machine.
The utility model content
At above-mentioned prior art B+ voltage when television set enters holding state also is the stand-by power consumption of other unit power supply having increased complete machines of system, and technical problem to be solved in the utility model is: provide a kind of B+ voltage that can automatically shut down when television set enters holding state to reduce the power supply circuits of stand-by power consumption.
The technical scheme in the invention for solving the above technical problem is: television set is treated the machine testing power supply circuits, comprises Switching Power Supply, first rectification circuit, second rectification circuit and standby testing circuit, also comprises a logic switching circuit; Described logic switching circuit is connected with first rectification circuit with the standby testing circuit simultaneously.
Described standby testing circuit comprises resistance R 1～resistance R 6, diode D3, triode Q1, triode Q3, pressurizer N1, integrated triode Q2 and photoelectrical coupler N2, triode Q1 is a positive-negative-positive, triode Q3 collector electrode by diode D3 successively series resistor R6, resistance R 5, resistance R 4, pressurizer N1, resistance R 2, resistance R 3 to its base stage, its grounded emitter; The emitter of triode Q1 connects pressurizer N1, and its base stage connects resistance R 1, and collector electrode connects the base stage of integrated triode Q2, and the collector electrode of integrated triode Q2 is connected between resistance R 2 and the resistance R 3, its grounded emitter, and photoelectrical coupler N2 is in parallel with resistance R 5.
Described logic switching circuit comprises triode Q4, triode Q5 and diode D4, the emitter of triode Q4 connects the output of first rectification circuit, its base stage connects the collector electrode of triode Q5, its collector electrode connects the base stage of triode Q5 and the negative electrode of diode D4, and the anode of diode D4 connects the negative electrode of diode D3.
The beneficial effects of the utility model are: can reduce stand-by power consumption, and treat the machine testing fast and reliable by logic switching circuit control B+ voltage shutoff automatically when television set enters holding state.
Description of drawings
Fig. 1 treats the machine testing power supply circuit for conventional television;
Fig. 2 is the machine testing power supply circuit for the treatment of of the present utility model.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing.
The utility model has increased a logic switching circuit on the basis for the treatment of the machine testing power supply circuits of conventional television, having solved conventional television B+ voltage when entering holding state also increases the problem of stand-by power consumption for the other system unit provides voltage.In addition, further can do some improvement and make its fast and reliable when treating machine testing the standby testing circuit in the power supply circuits of conventional television.
As shown in Figure 2, the machine testing power supply circuits for the treatment of of the present utility model comprise Switching Power Supply, first rectification circuit, second rectification circuit and standby testing circuit, also comprise a logic switching circuit; Logic switching circuit is connected with first rectification circuit with the standby testing circuit simultaneously.On concrete enforcement, the standby testing circuit comprises resistance R 1～resistance R 6, diode D3, triode Q1, triode Q3, pressurizer N1, integrated triode Q2 and photoelectrical coupler N2, triode Q1 is a positive-negative-positive, triode Q3 collector electrode by diode D3 successively series resistor R6, resistance R 5, resistance R 4, pressurizer N1, resistance R 2, resistance R 3 to its base stage, its grounded emitter; The emitter of triode Q1 connects pressurizer N1, and its base stage connects resistance R 1, and collector electrode connects the base stage of integrated triode Q2, and the collector electrode of integrated triode Q2 is connected between resistance R 2 and the resistance R 3, its grounded emitter, and photoelectrical coupler N2 is in parallel with resistance R 5.As can be seen, select for use positive-negative-positive triode Q1 to replace the NPN type triode Q1 of traditional power supply circuits in the utility model, can corresponding minimizing resistance R 7, make circuit simpler.In addition, in stand-by circuit, increased integrated triode (can select RN1206) Q2, can rapid and reliable responding to switch machine testing.
For television set, television set is in holding state when POWER is high level (5V), pressurizer N1 output this moment 5V voltage, triode Q1, Q2 are by, triode Q3 conducting, the about 2.7V of the cathode regulation of diode D3, triode Q4, Q5 are because of the not enough not conducting of base current, and the voltage V1 that the winding 1 of Switching Power Supply provides is turned off, and B+ is not provided voltage, thereby saved the power consumption that B+ voltage offers machine system other unit, reached the purpose that reduces the complete machine stand-by power consumption.Television set was in open state when POWER was low level (0V), this moment triode Q1, the Q2 conducting, triode Q3 by, diode D3 cathode voltage is about about 16V, triode Q5 base stage has current i bQ5 to flow through at this moment, amplify through triode Q5, its collector current icQ5=β ibQ5 (β is its amplification coefficient), because the collector electrode of triode Q5 links to each other with the base stage of triode Q4, so ibQ4=ibQ5, this moment, current i cQ5 amplified through triode Q4 again, and the base stage that the collector current icQ4=β ibQ4=β ibQ5 of triode Q4, this electric current get back to triode Q5 again forms positive feedback, thereby make triode Q1 rapidly, the Q2 conducting, the voltage V1 that the winding 1 of Switching Power Supply provides is switched on, and B+ voltage offers other unit of machine system, makes system's operate as normal.
Because Switching Power Supply has multiple different circuit representations; for a person skilled in the art; use basic technique principle of the present utility model; be easy to structure of the present utility model made improvements slightly according to foregoing description and turn-off the purpose that B+ voltage reduces stand-by power consumption when realizing that television set enters holding state, it all belongs to protection range of the present utility model.
Claims (3)
1. television set is treated the machine testing power supply circuits, comprises Switching Power Supply, first rectification circuit, second rectification circuit and standby testing circuit, it is characterized in that: also comprise logic switching circuit, described logic switching circuit connects the standby testing circuit and first rectification circuit.
2. television set according to claim 1 is treated the machine testing power supply circuits, it is characterized in that: described standby testing circuit comprises resistance R 1～resistance R 6, diode D3, triode Q1, triode Q3, pressurizer N1, integrated triode Q2 and photoelectrical coupler N2, triode Q1 is a positive-negative-positive, triode Q3 collector electrode by diode D3 successively series resistor R6, resistance R 5, resistance R 4, pressurizer N1, resistance R 2, resistance R 3 to its base stage, its grounded emitter; The emitter of triode Q1 connects pressurizer N1, and its base stage connects resistance R 1, and collector electrode connects the base stage of integrated triode Q2, and the collector electrode of integrated triode Q2 is connected between resistance R 2 and the resistance R 3, its grounded emitter, and photoelectrical coupler N2 is in parallel with resistance R 5.
3. television set according to claim 1 and 2 is treated the machine testing power supply circuits, it is characterized in that: described logic switching circuit comprises triode Q4, triode Q5 and diode D4, the emitter of triode Q4 connects the output of first rectification circuit, its base stage connects the collector electrode of triode Q5, its collector electrode connects the base stage of triode Q5 and the negative electrode of diode D4, and the anode of diode D4 connects the negative electrode of diode D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203001646U CN201153295Y (en) | 2008-01-29 | 2008-01-29 | Television standby detection power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203001646U CN201153295Y (en) | 2008-01-29 | 2008-01-29 | Television standby detection power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201153295Y true CN201153295Y (en) | 2008-11-19 |
Family
ID=40128971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203001646U Expired - Fee Related CN201153295Y (en) | 2008-01-29 | 2008-01-29 | Television standby detection power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201153295Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8570141B2 (en) | 2010-12-28 | 2013-10-29 | Industrial Technology Research Institute | Method and apparatus for monitoring and controlling a household appliance standby state |
| CN103809496A (en) * | 2014-03-05 | 2014-05-21 | 宁波市安博应急品有限公司 | Energy-saving control circuit of embedded system |
-
2008
- 2008-01-29 CN CNU2008203001646U patent/CN201153295Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8570141B2 (en) | 2010-12-28 | 2013-10-29 | Industrial Technology Research Institute | Method and apparatus for monitoring and controlling a household appliance standby state |
| CN103809496A (en) * | 2014-03-05 | 2014-05-21 | 宁波市安博应急品有限公司 | Energy-saving control circuit of embedded system |
| CN103809496B (en) * | 2014-03-05 | 2016-03-30 | 宁波市安博新能源科技有限公司 | The energy-saving control circuit of embedded system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |