CN2831648Y - Standby control circuit of TV set - Google Patents
Standby control circuit of TV set Download PDFInfo
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- CN2831648Y CN2831648Y CN 200520124120 CN200520124120U CN2831648Y CN 2831648 Y CN2831648 Y CN 2831648Y CN 200520124120 CN200520124120 CN 200520124120 CN 200520124120 U CN200520124120 U CN 200520124120U CN 2831648 Y CN2831648 Y CN 2831648Y
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Abstract
The utility model discloses a stand-by control circuit of a television, which comprises a CPU and a switch voltage changer multiway rectified output circuit, wherein the stand-by control circuit is connected with the +B voltage output end and the +12V voltage output end of the switch voltage changer multiway rectified output circuit, and the stand-by control circuit is realized through the connection of multiway switch three electro tubes. The conduction and the cutoff of the switch three electro tubes can be controlled by using the high level and the low level states of the output of a POWER pin of the CPU, thereby, the control of the standby of the television and the effective output of a power supply voltage can be realized. Separate components are adopted by the stand-by control circuit of the utility model to replace an IC integrated chip circuit in the original stand-by circuit, the utility model has the advantages of simple circuit construction, low cost, etc. The utility model not only can achieve the aim of the reduction of stand-by power consumption of the television, but also can improve the cost performance of television products and strengthen the market competition ability of the television products.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, specifically, relates to a kind of TV set circuit that is used for, the control circuit of the high-low level State Control television standby of the POWER pin output by CPU.
Background technology
Development along with society, the quantity of household electrical appliance is huge day by day, existing household electrical appliances are after inserting charged socket to attaching plug, will be charged on the automatically controlled plate, generally all can there be transformer that high voltage is become low-voltage, low-voltage AC be become the use of low-voltage DC supply subsequent control circuit through rectification and filter circuit.Whether mains switch is the part of control circuit system, when having only the low-voltage direct control circuit charged always and in running order, could press by the perception mains switch, and this has the problem of stand-by power consumption with regard to having caused household electrical appliance.In the past, its power loss was all more than 9W when standby for most of television set, and waste of energy is more serious.Be energy savings, promote whole TV industry and improve energy-saving design, country has released the green power supply authentication system, stand-by power consumption to all television sets adopts forcible authentication, require stand-by power consumption simultaneously, to carry out energy-saving design less than 9W in order to encourage complete machine manufacturer, to the type of stand-by power consumption, will allow on this type, to mark energy-saving sign less than 3W.For reaching the purpose of standby low-power consumption, at present, in existing TV set circuit, all dispose readiness control circuit.Most of readiness control circuit is realized by integrated chip IC that all power supply is given integrated chip IC power supply, and integrated chip IC judges whether standby, selects each road voltage of output then, and then reaches the purpose of stand-by energy-saving.But, adopt integrated chip IC to realize that Opportunity awaiting control for linear can make circuit cost raise, the market competitiveness of tv product is impacted.
Summary of the invention
The utility model raises for the circuit cost that Opportunity awaiting control for linear caused that solves available technology adopting integrated chip IC realization television set, the problem that is unfavorable for the tv product market competitiveness, a kind of novel TV machine readiness control circuit is provided, utilize the high-low level signal of the POWER pin output of CPU, cooperate simple auxiliary circuit, and then realize the Opportunity awaiting control for linear of television set and effective output of each road load voltage.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of readiness control circuit of television set, comprise cpu control circuit and switch transformer multichannel rectifying output circuit, in described switch transformer multichannel rectifying output circuit, include+B voltage output end and put the low-voltage power supply end that chip provides working power for the previewing of decoding deck; Control signal output ends at described CPU is connected with two groups of ON-OFF control circuit, the control end of first group of ON-OFF control circuit connects the control signal output ends of described CPU, gating end one end ground connection, the other end connects a direct current power supply on the one hand, extremely links to each other with a silicon controlled benchmark on the other hand; The described silicon controlled benchmark utmost point also links to each other with+B voltage output end, plus earth, and negative electrode links to each other with described DC power supply; The control end of second group of ON-OFF control circuit connects the control signal output ends of described CPU, and described switch transformer multichannel rectifying output circuit connects described low-voltage power supply end through the gating end of second group of ON-OFF control circuit.
As the further qualification to technique scheme, described DC power supply is wherein one road low-voltage dc power supply in the switch transformer multichannel rectifying output circuit, and its magnitude of voltage is+20V; Described first group of ON-OFF control circuit realized by a NPN type triode, wherein, the base stage of described NPN type triode connects the control signal output ends of CPU, and collector electrode connects described+20V DC power supply through a voltage-stabiliser tube, and connects the described silicon controlled benchmark utmost point through a switching diode.The described silicon controlled benchmark utmost point is connected with potentiometer+the B voltage output end through resistance, plus earth, and negative electrode connects described+20V DC power supply through resistance.
As further limiting again to technique scheme, described second group of ON-OFF control circuit connects realization by three NPN type triodes, wherein, the base stage of first NPN type triode connects the control signal output ends of described CPU, grounded emitter, collector electrode connects the base stage of second NPN type triode on the one hand, links to each other with one+5V DC power supply on the other hand, and described+5V DC power supply is obtained after the conversion of voltage stabilizing chip by+20V DC power supply; The grounded emitter of described second NPN type triode, collector electrode connect the base stage of the 3rd NPN type triode on the one hand, connect the collector electrode of described the 3rd NPN type triode on the other hand through resistance; The collector electrode of described the 3rd NPN type triode connects switch transformer multichannel rectifying output circuit+15V voltage output end, and emitter connects described low-voltage power supply end.Described low-voltage power supply end output+12V direct voltage is put chip for the previewing of decoding deck working power is provided.
As the further qualification again to technique scheme, the control signal output ends of described CPU is the POWER pin of CPU, and described silicon controlled model is KA431.
Compared with prior art, advantage of the present utility model with good effect is: readiness control circuit of the present utility model adopts separating component to be connected the IC integrated chip circuit that replaces in original stand-by circuit, utilize CPU POWER pin output high-low level state control switch triode conducting with end, and then realize the Opportunity awaiting control for linear of television set and effective output of supply voltage.Stand-by circuit of the present utility model is simple and reliable, has not only reached to reduce the purpose of standby power consumption of television set, and has reduced the cost of circuit, has realized the optimization of circuit, has effectively improved the market competitiveness of tv product.
Description of drawings
Fig. 1 is a readiness control circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Readiness control circuit of the present utility model mainly is to utilize the high-low level state of the POWER pin output of CPU to realize control to the double switch circuit, one the tunnel be by POWER level control triode V540 conducting with end, and then realize the reduction and the rising of right+B voltage; Another road be by POWER level control triode V573 conducting with end, and then the output that realizes right+12V voltage with block, the physical circuit annexation is referring to shown in Figure 1.
Among Fig. 1, the POWER pin of CPU connects the base stage of NPN type triode V540 on the one hand through resistance R 540, the grounded emitter of described NPN type triode V540, collector electrode is on the one hand through resistance R 544, voltage-stabiliser tube VDZ541 connects switch transformer multichannel rectifying output circuit output+20V DC power supply, the benchmark utmost point that connects controllable silicon N503 on the other hand through switching diode VD542, the model of described controllable silicon N503 is KA431, its plus earth, negative electrode connects described+20V DC power supply through resistance R 542, and the benchmark utmost point is connected with resistance R 532 that switch transformer multichannel rectifying output circuit exports+B voltage through potentiometer RP531.When the television set standby, the POWER pin output low level standby signal STB of CPU, triode V540 ends, and making its collector voltage is 20V, and switching diode VD542 conducting produces the benchmark utmost point flow direction ground of electric current from controllable silicon N503.To remain on 2.5V constant for the benchmark pole tension that makes controllable silicon N503 ,+B voltage source can reduce to the electric current of the benchmark utmost point, so just realized+decline of B voltage, reduced stand-by power consumption.When the television set operate as normal, CPU is changed to high level ON with its POWER pin, and triode V540 conducting drags down its collector voltage, and switching diode VD542 ends, and then the normal output of realization+B voltage.
On the other hand, the POWER pin of CPU connects the base stage of NPN type triode V573 through resistance R 575, the grounded emitter of described NPN type triode V573, collector electrode connects the base stage of NPN type triode V574 on the one hand, on the other hand through resistance R 576 connection+5V DC power supply.By resistance R 549, L7805CV converts described+5V DC power supply through the voltage stabilizing chip by switch transformer multichannel rectifying output circuit output+20V DC power supply.The grounded emitter of described NPN type triode V574, collector electrode connects the base stage of NPN type triode V571 on the one hand, on the other hand through resistance R 571 connect the output of switch transformer multichannel rectifying output circuits+the 15V DC power supply.Collector electrode connection+15V the DC power supply of described NPN type triode V571, emitter connection+12V voltage output end.When the television set standby, the POWER pin output low level standby signal STB of CPU, triode V573 ends, and makes its collector voltage be+5V triode V574 conducting, drag down its collector potential, NPN type triode V571 is ended, thereby the output of blocking-up+12V voltage stop that the previewing of decoding deck is put chip and power, guarantee that display screen is in off state, reach the purpose of standby consumption reduction.When television set needed operate as normal, CPU made triode V573 conducting by its POWER pin output high level ON signal, drags down the base potential of triode V574, thereby triode V574 is ended.At this moment, + 15V DC power supply affacts the base stage of triode V571 through resistance R 571, control its conducting, and then make switch transformer multichannel rectifying output circuit output+the 15V DC power supply is after triode V571 step-down, output+12V direct voltage is put chip for the previewing on the subsequent decoding plate power supply power supply is provided, thereby the starting of oscillation of control row-field scanning realizes the normal output of television image.
The utility model is by adopting above-mentioned simple circuit configuration, utilize CPU POWER pin output the high-low level state to the output of switch transformer multichannel rectifying output circuit+B voltage and+the 12V supply voltage controls, when standby, output by reduction+B voltage and blocking-up+12V supply voltage realizes the reduction of stand-by power consumption, at this moment, because each road DC power supply output of other of switch transformer multichannel rectifying output circuit all connects zero load, so there is not further power loss.Thus, the purpose that readiness control circuit of the present utility model has realized directly not controlling by the IC integrated chip television standby and supply voltage output has realized the optimization of circuit cost, thereby has effectively improved the market competitiveness of tv product.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. the readiness control circuit of a television set, comprise cpu control circuit and switch transformer multichannel rectifying output circuit, in described switch transformer multichannel rectifying output circuit, include+B voltage output end and put the low-voltage power supply end that chip provides working power for the previewing of decoding deck; It is characterized in that: the control signal output ends at described CPU is connected with two groups of ON-OFF control circuit, the control end of first group of ON-OFF control circuit connects the control signal output ends of described CPU, gating end one end ground connection, the other end connects a direct current power supply on the one hand, extremely links to each other with a silicon controlled benchmark on the other hand; The described silicon controlled benchmark utmost point also links to each other with+B voltage output end, plus earth, and negative electrode links to each other with described DC power supply; The control end of second group of ON-OFF control circuit connects the control signal output ends of described CPU, and described switch transformer multichannel rectifying output circuit connects described low-voltage power supply end through the gating end of second group of ON-OFF control circuit.
2. television set readiness control circuit according to claim 1, it is characterized in that: described first group of ON-OFF control circuit realized by a NPN type triode, the base stage of described NPN type triode connects the control signal output ends of CPU, collector electrode connects described DC power supply on the one hand, extremely link to each other its grounded emitter with described silicon controlled benchmark on the other hand.
3. television set readiness control circuit according to claim 2, it is characterized in that: described DC power supply is wherein one road low-voltage dc power supply of switch transformer multichannel rectifying output circuit output, its magnitude of voltage is+20V, the collector electrode of described NPN type triode connects described+20V DC power supply through a voltage-stabiliser tube, and connects the described silicon controlled benchmark utmost point through a switching diode.
4. television set readiness control circuit according to claim 3 is characterized in that: the described silicon controlled benchmark utmost point is connected with potentiometer+the B voltage output end through resistance, plus earth, and negative electrode connects described+20V DC power supply through resistance.
5. television set readiness control circuit according to claim 1 and 2, it is characterized in that: described second group of ON-OFF control circuit connects realization by three NPN type triodes, wherein, the base stage of first NPN type triode connects the control signal output ends of described CPU, grounded emitter, collector electrode connects the base stage of second NPN type triode on the one hand, links to each other with a low-voltage dc power supply on the other hand; The grounded emitter of described second NPN type triode, collector electrode connect the base stage of the 3rd NPN type triode on the one hand, connect the collector electrode of described the 3rd NPN type triode on the other hand through resistance; The collector electrode of described the 3rd NPN type triode connects wherein one road dc power output end of described switch transformer multichannel rectifying output circuit, and emitter connects described low-voltage power supply end.
6. television set readiness control circuit according to claim 5, it is characterized in that: the collector electrode of described the 3rd NPN type triode connect described switch transformer multichannel rectifying output circuit+the 15V voltage output end, emitter connects described low-voltage power supply end.
7. television set readiness control circuit according to claim 6 is characterized in that: described low-voltage power supply end output+12V direct voltage, and put chip for the previewing of decoding deck working power is provided.
8. television set readiness control circuit according to claim 5 is characterized in that: the control signal output ends of described CPU is the POWER pin of CPU.
9. television set readiness control circuit according to claim 7 is characterized in that: the low-voltage dc power supply that links to each other with the collector electrode of described first NPN type triode be switch transformer multichannel rectifying output circuit output+the 20V DC power supply exports+the 5V DC power supply through voltage stabilizing chip conversion back.
10. television set readiness control circuit according to claim 4 is characterized in that: described silicon controlled model is KA431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520124120 CN2831648Y (en) | 2005-11-04 | 2005-11-04 | Standby control circuit of TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520124120 CN2831648Y (en) | 2005-11-04 | 2005-11-04 | Standby control circuit of TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2831648Y true CN2831648Y (en) | 2006-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520124120 Expired - Fee Related CN2831648Y (en) | 2005-11-04 | 2005-11-04 | Standby control circuit of TV set |
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| Country | Link |
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| CN (1) | CN2831648Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753927B (en) * | 2008-12-22 | 2012-03-21 | 康佳集团股份有限公司 | Delayed switching circuit and control method thereof |
| WO2016090573A1 (en) * | 2014-12-10 | 2016-06-16 | Thomson Licensing | Indicator circuit and apparatus using the same |
-
2005
- 2005-11-04 CN CN 200520124120 patent/CN2831648Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753927B (en) * | 2008-12-22 | 2012-03-21 | 康佳集团股份有限公司 | Delayed switching circuit and control method thereof |
| WO2016090573A1 (en) * | 2014-12-10 | 2016-06-16 | Thomson Licensing | Indicator circuit and apparatus using the same |
| CN107006098A (en) * | 2014-12-10 | 2017-08-01 | 汤姆逊许可公司 | Indicator circuit and the device using the indicator circuit |
| US10477632B2 (en) | 2014-12-10 | 2019-11-12 | Interdigital Ce Patent Holdings | Indicator circuit and apparatus using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |