CN200941659Y - TV set having low power consumption standby circuit - Google Patents
TV set having low power consumption standby circuit Download PDFInfo
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- CN200941659Y CN200941659Y CN 200620088496 CN200620088496U CN200941659Y CN 200941659 Y CN200941659 Y CN 200941659Y CN 200620088496 CN200620088496 CN 200620088496 CN 200620088496 U CN200620088496 U CN 200620088496U CN 200941659 Y CN200941659 Y CN 200941659Y
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Abstract
The utility model discloses a TV set with low power consumption standby circuit which comprises a switch-type transformer. The output end of one channel of the switch-type transformer outputs the standby power supply needed by an output sound board through a sound standby circuit; the output end of the switch-type transformer is connected with the input end of a power supply voltage regulation chip through a switch circuit conducted only in standby status, the output end of the power supply voltage regulation chip is connected with a decoding plate to output the standby power supply needed by the decoding plate. The utility model fully takes advantage of that channel of output power supply that the switch-type transformer outputs for the sound board in standby status, which is also used to provide the operation power supply for a decoding plate standby circuit, and provides the TV decoding plate with the standby power through the decoding plate standby circuit, accordingly the utility model realizes a decrease of the output voltage of the switch-type transformer to a great extent, makes the standby power consumption smaller than 3w and achieves the requirement of energy saving certificate. The whole standby circuit is composed by discrete components with low price, is simple in structure, easy to realize and highly practical.
Description
Technical field
The utility model belongs to technical field of television sets, relates to a kind of improvement of TV set circuit, specifically, relates to a kind of power-supplying circuit of realizing the standby low-power consumption.
Background technology
In the past, the television set power consumption was all more than 9W when standby for the power circuit of 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.In order to realize the purpose of standby low-power consumption, present most of television set is made all released one after another oneself low-power consumption standby circuit of producer.These stand-by circuits are complex structure mostly, and is not suitable for being applied in the power circuit of high-end TV.High-end television sets for this class of picture panel TV, owing to be subjected to the influence of self circuit design, its inner many devices still need direct current supply during standby, each road voltage of switch transformer output especially+range of decrease of B reference voltage all can not be very big, this just causes the stand-by power consumption of complete machine can not fall very lowly, has brought difficulty for the energy-saving design of television set.
Summary of the invention
The utility model is in order to solve stand-by power consumption circuit structure complexity in the prior art, the unfavorable problem of energy-saving effect, a kind of novel low power consumption standby power supply circuit is provided, making full use of switch transformer is that road out-put supply of sound accompaniment circuit output standby power when standby, dual-purpose comes to provide working power for the decoding deck stand-by circuit, and provide standby voltage to the television set decoding deck by described decoding deck stand-by circuit, thereby realized the reduction significantly of switch transformer output voltage, make stand-by power consumption be lower than 3W, reached the requirement of energy-conservation authentication.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of television set with low-power consumption standby circuit comprises switch transformer, and wherein one road output (hereinafter referred to as first output) of described switch transformer is through the required standby power of sound accompaniment stand-by circuit output sound accompaniment plate; In addition, first output of described switch transformer connects the input of a power supply voltage stabilizing chip through the switching circuit of a conducting during only in standby, and the output of described power supply voltage stabilizing chip connects decoding deck, the standby power that the output decoder plate is required.
In order to reach the only purpose of conducting when the television standby of switching circuit, in described switching circuit, include a NPN type triode, the base stage of described triode connects first output of switch transformer through divider resistance, and through voltage stabilizing didoe ground connection; The collector electrode of described triode connects first output of switch transformer, and emitter connects the input of described power supply voltage stabilizing chip.Another road output (hereinafter referred to as second output) of described switch transformer connects the anode of a diode through filter circuit, and the negative electrode of described diode connects the input of described power supply voltage stabilizing chip.
In order to realize the control of standby signal to described switching circuit, second output of described switch transformer connects the negative electrode of a voltage-stabiliser tube, the anode of described voltage-stabiliser tube connects the collector electrode of a NPN type triode, the base stage of described triode receives the standby signal of CPU output, grounded emitter, collector electrode is through a switching diode and grounding through resistance.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is set up stand-by circuit simple in structure on the basis of conventional power source circuit, and make full use of that road out-put supply that switch transformer is a sound accompaniment circuit output standby power when standby, dual-purpose comes to provide working power for the decoding deck stand-by circuit, and provide standby power to the television set decoding deck by described decoding deck stand-by circuit, thereby realized the reduction significantly of switch transformer output voltage, make stand-by power consumption be lower than 3W, reached the requirement of energy-conservation authentication.Whole stand-by circuit is set up by cheap discrete component and is formed, and simple in structure, easy realization is practical.
Description of drawings
Fig. 1 is the schematic diagram of low-power consumption standby circuit in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Traditional television set stand-by circuit is leaded up to stand-by circuit specially for decoding deck provides standby power for the two-way direct current output that decoding deck and sound accompaniment plate provide standby power to need switch transformer, is generally 5V; Another road by stand-by circuit specially for the sound accompaniment plate provides standby power, generally about 10V.This makes that the range of decrease of switch transformer its output voltage when standby can not be very big, causes the complete machine stand-by power consumption can not be very low, generally all more than 3W, is difficult to reach the requirement of energy-conservation authentication.The utility model makes full use of switch transformer that road out-put supply for sound accompaniment plate output standby power when standby, dual-purpose comes to provide working power for the decoding deck stand-by circuit, and provide standby power to the television set decoding deck by described decoding deck stand-by circuit, thereby realized the reduction significantly of switch transformer output voltage, its particular circuit configurations is referring to shown in Figure 1.
Among Fig. 1,5V-1 end connects decoding deck, when standby to decoding deck output+5V direct current supply.Wherein one road output T-2 of switch transformer connects the anode of switching diode VD531 through fuse RF541, electromagnetic interference shielding circuit VD541, C541, filter capacitor C542, the negative electrode of described switching diode VD531 is through the input of resistance R 545 connection power supply voltage stabilizing chip N541, and the output of described power supply voltage stabilizing chip N541 connects the 5V-1 end through filter capacitor C544, C545.Wherein, the 7.5V-1 end is through the negative electrode of the resistance R 520 connection voltage-stabiliser tube VDZ505 of series connection, and the anode of described voltage-stabiliser tube VDZ505 connects the collector electrode of NPN type triode V540, and through switching diode VD543, resistance R 533 ground connection.The grounded emitter of described NPN type triode V540, base stage connects the I/O mouth of MCU, receives the standby signal STB of its output.
Be connected with a switching circuit at described 7.5V-1 end, described switching circuit is conducting when the television set standby only, for the decoding deck stand-by circuit provides working power.Wherein, the 25V-1 end is another road output of switch transformer, and output+25V direct voltage during operate as normal drops to during standby about 10V, provides standby power by stand-by circuit for the sound accompaniment plate.In described switching circuit, include a NPN type triode V542, the collector electrode of described triode V542 connects the 25V-1 end, base stage connects described 25V-1 end through resistance R 548 on the other hand on the one hand through voltage stabilizing didoe VDZ504 ground connection, and its emitter connects the 7.5V-1 end through resistance R 546.Described voltage stabilizing didoe VDZ504 can be clamped at 8.2V with the base voltage of triode V542.
When the television set operate as normal, standby signal STB is a high level, triode V540 conducting, from the electric current of 7.5V-1 end output through triode V540 to ground, the voltage of 7.5V-1 end is 10V.At this moment, triode V542 ends, and stand-by circuit is inoperative, and power supply voltage stabilizing chip N541 receives the direct voltage of 7.5V-1 end output, convert thereof into+the 5V direct voltage provides the operate as normal power supply for decoding deck.
When the television set standby, standby signal STB is a low level, and triode V540 ends, from the electric current of 7.5V-1 end output through voltage-stabiliser tube VDZ505, switching diode VD543, resistance R 533 to ground.At this moment, the voltage of 7.5V-1 end descends always, when being reduced to 7.5V, and triode V542 conducting, diode VD531 oppositely ends.Power supply voltage stabilizing chip N541 provides direct current supply by 25V-1 end, convert thereof into+the 5V direct voltage provides standby power for decoding deck.The direct voltage of 25V-1 end also reduces when standby always, specifically reduces voltage by voltage-stabiliser tube VDZ505 decision, approximately maintains about 10V during standby.
The utility model is by increasing above-mentioned stand-by circuit in traditional power circuit, control voltage is provided by higher sound accompaniment output voltage during standby, + B reference voltage can be realized reducing significantly, and the complete machine stand-by power consumption obviously descends, and has reached the purpose of energy savings.
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 (5)
1. the television set with low-power consumption standby circuit comprises switch transformer, and wherein one road output (hereinafter referred to as first output) of described switch transformer is through the required standby power of sound accompaniment stand-by circuit output sound accompaniment plate; It is characterized in that: first output of described switch transformer connects the input of a power supply voltage stabilizing chip through the switching circuit of a conducting during only in standby, and the output of described power supply voltage stabilizing chip connects decoding deck, the standby power that the output decoder plate is required.
2. the television set with low-power consumption standby circuit according to claim 1 is characterized in that: another road output (hereinafter referred to as second output) of described switch transformer connects the input of described power supply voltage stabilizing chip.
3. the television set with low-power consumption standby circuit according to claim 2, it is characterized in that: described switching circuit comprises a NPN type triode, the base stage of described triode connects first output of switch transformer through divider resistance, and through voltage stabilizing didoe ground connection; The collector electrode of described triode connects first output of switch transformer, and emitter connects the input of described power supply voltage stabilizing chip.
4. the television set with low-power consumption standby circuit according to claim 3, it is characterized in that: second output of described switch transformer connects the negative electrode of a voltage-stabiliser tube, the anode of described voltage-stabiliser tube connects the collector electrode of a NPN type triode, the base stage of described triode receives the standby signal of CPU output, grounded emitter, collector electrode is through a switching diode and grounding through resistance.
5. the television set with low-power consumption standby circuit according to claim 4, it is characterized in that: second output of described switch transformer connects the anode of a diode through filter circuit, and the negative electrode of described diode connects the input of described power supply voltage stabilizing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620088496 CN200941659Y (en) | 2006-08-28 | 2006-08-28 | TV set having low power consumption standby circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620088496 CN200941659Y (en) | 2006-08-28 | 2006-08-28 | TV set having low power consumption standby circuit |
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| Publication Number | Publication Date |
|---|---|
| CN200941659Y true CN200941659Y (en) | 2007-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620088496 Expired - Fee Related CN200941659Y (en) | 2006-08-28 | 2006-08-28 | TV set having low power consumption standby circuit |
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| CN (1) | CN200941659Y (en) |
Cited By (1)
| 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 |
-
2006
- 2006-08-28 CN CN 200620088496 patent/CN200941659Y/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20100828 |