CN100481206C - Power-supply control circuit of display device - Google Patents
Power-supply control circuit of display device Download PDFInfo
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- CN100481206C CN100481206C CNB2005101261531A CN200510126153A CN100481206C CN 100481206 C CN100481206 C CN 100481206C CN B2005101261531 A CNB2005101261531 A CN B2005101261531A CN 200510126153 A CN200510126153 A CN 200510126153A CN 100481206 C CN100481206 C CN 100481206C
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Abstract
The invention discloses a power supply control circuit, comprising: an isolating circuit, receiving separate video signal and outputting a startup signal; a drive circuit, receiving the startup signal and outputting a DC to start up a power supply module. And the other instance comprises a first signal generating circuit to generate a first signal; a second signal generating circuit, receiving a DC to sustain operation when a display device is in standby state and outputting a second signal when receiving the first signal; a drive circuit, receiving the second signal and outputting a DC to start up a power supply module; an isolating circuit, receiving separate video signal and outputting a startup signal; and a control circuit, receiving the startup signal and outputting the DC to start up the power supply module. And it can largely reduce power consumption in the standby state.
Description
Technical field
The present invention is about a kind of power control circuit, and particularly a kind of display device that is applied to reduces the power control circuit of power consumption.
Background technology
The European Common Market has come into effect new laws and regulations of energy, and the power consumption of power supply unit must limit less than some when it was defined in zero load, and this restriction is harsh gradually.In the U.S., the president Bush also signs a administrative decree, stipulates all federal government units in addition, must give priority to purchasing electronics/electrical appliance that standby consumption is lower than a watt.
Traditional power control circuit if not with mechanical switch as basic module, the general practice is thought all that the system IC of maintaining operates and is controlled the peripheral circuit function, reaches the purpose of switching on and shutting down.Therefore, need provide the firm power of this IC running at least,, still can't decommission but in fact install even switch cuts out device.And can't reduce the consumption of power supply therefore.
For example, announce No. 561334 Taiwan patent and disclose a kind of " power-supply management system of LCD ", can make liquid crystal indicator comply with the enabled status of a synchronous signal or deenergize state and the operation that enters normal mode or battery saving mode respectively, and the power-supply management system that is disclosed comprises a power supply device, an electric power input switch device and an arrangement for detecting.Power supply device is changed a line voltage of an electric power source, in order to do to offer above-mentioned display device.Wherein when electric power input switch device when opening, input line voltage is in power supply unit, when electric power input switch device when closing, line voltage is no longer imported power supply device.Arrangement for detecting becomes the state of deenergizing by enabled status after a Preset Time is closed above-mentioned electric power input switch device in order to the detecting synchronizing signal.
In order to reduce power supply power consumption, a kind of method is for example to adopt trigger mode to come work under standby mode, and satisfying the regulation of International Energy Agency (IEA), that is stand-by power consumption need be reduced to below 1 watt.This standard criterion has been stipulated system under holding state, the standby power amount that switched power supplier (SMPS) can consume.
Become strict along with standard of energy heals, require the consumed power when standby need reach below 1 watt, for the power consumption of present electronic component and electronic installation, not a duck soup.Yet,, reduce the technical need that the power consumption of electronic installation when standby become a kind of permanent serious hope in order to economize electric standard in response to the stricter energy.
Summary of the invention
The objective of the invention is to disclose a kind of power control circuit of display device,, solve existing problem of prior art or shortcoming to reduce the power supply power consumption.
In view of above problem, the invention discloses a kind of power control circuit, include a buffer circuit, receive the separate type signal of video signal and export an enabling signal; And one drive circuit, be connected with buffer circuit, after receiving enabling signal, export a direct current power supply, to start a power module.
Another embodiment of power control circuit disclosed by the invention includes one first signal generating circuit, exports one first signal; One secondary signal produces circuit, is connected with this first signal generating circuit, exports a secondary signal after receiving this first signal, and this secondary signal is controlled this power module and stopped or coming into operation; One drive circuit produces circuit with secondary signal and is connected, receive secondary signal after, export a direct current power supply, to start a power module; One buffer circuit receives the separate type signal of video signal and exports an enabling signal; And a control circuit, be connected with buffer circuit, after receiving enabling signal, the output DC source is to start power module.
According to embodiments of the invention, system IC need not bear the function of opening machine, therefore power control circuit no longer needs to provide electric power, can suspend action fully and the consumption of reduction firm power, by the running of separate type signal of video signal or signal generating circuit, start power-supply controller of electric and can open display device again, under the state of standby, machine only need be kept the running that secondary signal produces circuit, can significantly reduce the power consumption under the holding state.
Below in embodiment, be described in detail detailed features of the present invention and advantage, its content is enough to make any those of ordinary skill in the art of being familiar with to understand technology contents of the present invention and implements according to this, and according to the disclosed content of this instructions, claim and accompanying drawing, any those of ordinary skill in the art of being familiar with can understand purpose and the advantage that the present invention is correlated with easily.
Above about content of the present invention explanation and the explanation of following embodiment in order to demonstration with explain principle of the present invention, and provide claim of the present invention further to explain.
Description of drawings
Fig. 1 is the system block diagrams of first embodiment of power control circuit disclosed in this invention;
Fig. 2 is the detailed circuit diagram of first embodiment of power control circuit disclosed in this invention;
Fig. 3 is the system block diagrams of second embodiment of power control circuit disclosed in this invention;
Fig. 4 is the detailed circuit diagram of second embodiment of power control circuit disclosed in this invention.
Wherein, Reference numeral:
100 first rectification circuits, 110 buffer circuits
120 driving circuits, 130 clamp circuits
140 second rectification circuits, 150 power modules
101 diodes, 102 diodes
103 diodes, 104 diodes
111 photo-couplers, 121 transistors
200 first rectification circuits
210 first signal generating circuits
220 secondary signals produce circuit 230 driving circuits
240 mu balanced circuits, 250 power modules
260 buffer circuits, 270 control circuits
280 clamp circuits, 290 second rectification circuits
201 diodes, 202 diodes
203 diodes, 204 diodes
231 transistors, 241 Zener diodes
261 photo-couplers, 271 transistors
SW switch R1 first resistance
R2 second resistance R 3 the 3rd resistance
R4 the 4th resistance R 5 the 5th resistance
R6 the 6th resistance R 7 the 7th resistance
R8 the 8th resistance R 9 the 9th resistance
R10 the tenth resistance C1 first electric capacity
C2 second capacitor C 3 the 3rd electric capacity
C4 the 4th capacitor C 5 the 5th electric capacity
The D1 first diode D2 second diode
Embodiment
For making purpose of the present invention, structure, feature and function thereof there are further understanding, cooperate embodiment to be described in detail as follows now.
Please refer to Fig. 1, the system block diagrams of power control circuit disclosed in this invention, include one first rectification circuit 100, a buffer circuit 110, one drive circuit 120, a clamp circuit 130, one second rectification circuit 140, so that power module 150 is carried out the control of switch.It is formed and function is described as follows:
In one embodiment, the separate type signal of video signal can be horizontal signal (H-SYNC); In another embodiment, the separate type signal of video signal can be vertical signal (V-SYNC).Separate type signal of video signal herein makes buffer circuit 110 outputs one enabling signal in order to activation buffer circuit 110 when standby mode or the sleep pattern, to start driving circuit 120.In other embodiments, buffer circuit 110 also can receive the enable signal that is enough to activation buffer circuit 110, makes buffer circuit 110 export an enabling signal, to start driving circuit 120.
In one embodiment, for the separate type signal of video signal being received by buffer circuit 110 effectively and correctly starting power module 150, can adopt a clamp circuit 130 and one second rectification circuit 140.Clamp circuit 130 can be with the strangulation of separate type signal of video signal at a predetermined voltage quasi position, and second rectification circuit 140 is connected with clamp circuit 130, so that this strangulation is carried out rectification at the separate type signal of video signal of a voltage quasi position of being scheduled to.The also non-imperative of use of this clamp circuit 130 of thought and this second rectification circuit 140, whether it is not selected for use the person for visual actual demand.
In fact power module 150 can be a power supply unit.In another embodiment, can be a PWM power-supply controller of electric.In another embodiment, can be a power supply control chip.Power module 150 receives the direct supply of first rectification circuit, 100 outputs, can send it to display device, and the system that makes can be subjected to the power supply supply and normal operation.
See through above circuit framework, under normal power supply state, the required power supply of system can be supplied to system via power module 150 again via after 100 rectifications of first rectification circuit.And when entering standby in system, display device will make total system be in standby mode because of the halt input as the separate type signal of video signal of enable signal this moment, and at this moment, the direct supply of first rectification circuit, 100 outputs will be no longer to power module 150 power supplies.Receive that a separate type signal of video signal is imported once more and after the activation, buffer circuit 110 is exported an enabling signal immediately up to buffer circuit 110,, make power module 150 can see through driving circuit 120 and start once again with on-state drive circuit 120.Seeing through above circuit framework can make and reduce the consumed power of display device, and then reduce the consumed power of total system at holding state under the display device holding state.
With reference to figure 2, be the detailed circuit diagram of power control circuit disclosed in this invention.
In one embodiment, first rectification circuit 100 is a full-wave bridge rectifier circuit, is made up of four diodes 101～104, flows power supply in order to the AC power rectification is become always.(not shown) in another embodiment, the actual needs of visual circuit running adopts half-wave rectifying circuit.
In addition, in order to protect integrated circuit, the output terminal of first rectification circuit 100 is connected with one the 4th capacitor C 4, in order to filtering noise.The output terminal of first rectification circuit 100 is connected with the 3rd resistance R 3 and the 4th resistance R 4 in addition.The 3rd resistance R 3 and the 4th resistance R 4 are parallel with one another.In another embodiment, can be via suitably selecting, and the 3rd resistance R 3 and the 4th resistance R 4 are replaced with single resistance.Between the output terminal of first rectification circuit 100 and driving circuit 120, be connected with the 5th resistance R 5 and the 6th resistance R 6.In another embodiment, can be via suitably selecting, and the 5th resistance R 5 and the 6th resistance R 6 are replaced with single resistance.Other has one the 7th resistance R 7 to be connected between the output terminal and power module 150 of first rectification circuit 100.
Please refer to Fig. 3, be second embodiment of power control circuit disclosed in this invention.In this embodiment, when holding state, power module more can see through signal generating circuit and produce a start trigger signal except can utilizing the unlatching of separate type signal of video signal.
Include one first rectification circuit 200, one first signal generating circuit 210, secondary signal generation circuit 220, one drive circuit 230, a mu balanced circuit 240, a buffer circuit 260, a control circuit 270, a clamp circuit 280, one second rectification circuit 290 as figure, power module 250 is carried out switch control.It is formed and function is described as follows.
In one embodiment, the separate type signal of video signal can be horizontal signal (H-SYNC); In another embodiment, the separate type signal of video signal can be vertical signal (V-SYNC).Herein separate type signal of video signal system makes buffer circuit 260 outputs one enabling signal in order to activation buffer circuit 260 when standby mode or the sleep pattern, to start driving circuit 230.In other embodiments, buffer circuit 260 also can receive the enable signal that is enough to activation buffer circuit 260, makes buffer circuit 260 export an enabling signal, to start driving circuit 230.
In one embodiment, for the separate type signal of video signal being accepted by buffer circuit 260 effectively and correctly starting power module 250, can adopt a clamp circuit 280 and one second rectification circuit 290.Clamp circuit 280 can be with the strangulation of separate type signal of video signal at a predetermined voltage quasi position, and second rectification circuit 290 is connected with clamp circuit 280, so that this strangulation is carried out rectification at the separate type signal of video signal of a voltage quasi position of being scheduled to.The also non-imperative of use of this clamp circuit 280 of thought and this second rectification circuit 290, whether it is not selected for use the person for visual actual demand.
In one embodiment, in fact power module 250 can be power supply unit.In another embodiment, can be a PWM power-supply controller of electric.In another embodiment, can be a power supply control chip.Power module 250 receives the direct supply of first rectification circuit, 200 outputs, can send it to display device, and the system that makes can be subjected to the power supply supply and normal operation.
See through above circuit framework, under normal power supply state, the required power supply of display device can be supplied to system via power module 250 again via after 200 rectifications of first rectification circuit.And entering holding state in display device, the direct supply of first rectification circuit, 200 outputs will operate required power supply and only provide secondary signal to produce circuit 220 no longer to power module 250 power supplies.After first signal generating circuit, 210 generation pulse signals produce circuit 220 to secondary signal, secondary signal produces circuit 220 outputs one enabling signal on-state drive circuit 230, making power module 250 to produce circuit 220 by secondary signal sees through driving circuit 230 and starts display device, so can be under holding state, reduce the standby consumed power of electronic package, to reduce the consumed power of total system at holding state.
On the other hand, after system entered holding state, the direct supply of first rectification circuit, 200 outputs will be no longer to power module 250 power supplies, as the also halt input of separate type signal of video signal of enable signal; When buffer circuit 260 receives a separate type signal of video signal once more, promptly export an enabling signal to control circuit 270, make power module 250 and to return normal operating conditions through control circuit 270.So can under holding state, reduce the consumed power of total system to power module 250 power supplies at holding state by stopping.
Please refer to Fig. 4, be the detailed circuit diagram of second embodiment of power control circuit disclosed in this invention.
In a second embodiment, first rectification circuit 200 is a full-wave bridge rectifier circuit, is made up of four diodes 201～204, flows power supply in order to the AC power rectification is become always.(not shown) in another embodiment, the actual needs of visual circuit running adopts half-wave rectifying circuit.
First signal generating circuit 210 produces circuit 220 in order to produce a pulse signal to secondary signal.It includes a switch SW.Switch SW one end is connected to secondary signal and produces circuit 220, and the other end sees through first resistance R 1 and is connected to earth terminal.In another embodiment, consider the stability and the discriminability of the signal that switch SW produced in first signal generating circuit, 210 first signal generating circuits 210, can increase by second resistance R 2 and first capacitor C 1.Second resistance R, 2 one ends and first resistance R 1 are joined, and the other end and secondary signal produce circuit 220 and join.One end of first capacitor C 1 and second resistance R 2 are joined, and the other end and earth terminal join.
The pulse signal that the direct supply that 220 receptions of secondary signal generation circuit, first rectification circuit 200 is exported and first signal generating circuit 210 are exported, export an enabling signal then, this enabling signal can be the signal of a high levle or low level voltage, by the difference of voltage quasi position and control the running of power module 250.In one embodiment, utilize a JK flip-flop, the output terminal of its J input end and K input end and first signal generating circuit 210 joins, that is joins with an end of switch SW, Q output terminal suspension joint, and the Q output terminal is electrically connected to driving circuit 230.In another embodiment, Q output terminal suspension joint, the Q output terminal is electrically connected to driving circuit 230.In addition, illustrated according to the aforementioned system calcspar, this area has knows that usually the knowledgeable ought be as can be known, and Q output terminal or Q output terminal also can directly connect power module 250 and control its running, look closely the characteristic of power module 250 and are changed.
Driving circuit 230 is after receiving enabling signal, and the direct supply that first rectification circuit 200 is exported sends power module 250 to.Driving circuit 230 includes a transistor 231, is an IGBT; Can select transistors such as MOSFET, two-carrier transistor in another embodiment for use.Be connected with one the 3rd resistance R 3 between Q output terminal and the transistor 241.
Accurate pulse signal can be judged in order to make secondary signal produce circuit 220, mu balanced circuit 240 can be seen through the pulse signal voltage stabilizing.Include a Zener (ZENER) diode 241, one ends in the mu balanced circuit 240 and be connected with switch SW, the other end is connected to earth terminal.
In addition, in order to protect integrated circuit, the output terminal of first rectification circuit 200 is connected with one the 4th capacitor C 4, in order to filtering noise.The output terminal of first rectification circuit 200 is connected with the 5th resistance R 5 and the 6th resistance R 6 in addition.The 5th resistance R 5 and the 6th resistance R 6 are parallel with one another, and the other end of the 6th resistance R 6 is connected with one the 5th capacitor C 5.In another embodiment, can be via suitably selecting, and the 5th resistance R 5 and the 6th resistance R 6 are replaced with single resistance.Between the output terminal of first rectification circuit 200 and power module 250, be connected with the 7th resistance R 7 and the 8th resistance R 8.In another embodiment, can be via suitably selecting, and the 7th resistance R 7 and the 8th resistance R 8 are replaced with single resistance.
According to embodiments of the invention, system IC need not bear the function of opening machine, so power control circuit no longer needs to provide electric power, can suspend action fully and reduces firm power consumption when shutting down fully.Other is by the running that cooperatively interacts of signal generating circuit and/or separate type signal of video signal, no matter be that system switches to normal boot-strap from shutting down fully, or the switching of operate as normal in the open state and standby mode, via signal generating circuit to the control of power-supply controller of electric and buffer circuit in response to the input of separate type signal of video signal to the control of power-supply controller of electric, can make display device in shutdown or holding state fully, all can significantly reduce the power consumption of system.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (33)
1. the power control circuit of a display device is characterized in that, includes:
One buffer circuit receives a separate type signal of video signal and exports an enabling signal;
This buffer circuit includes:
One photo-coupler; And first resistance, be connected to this photo-coupler; And
One drive circuit is connected with this buffer circuit, after receiving this enabling signal, exports a direct current power supply, to start a power module.
2. power control circuit according to claim 1 is characterized in that, this separate type signal of video signal is a horizontal signal (H-SYNC).
3. power control circuit according to claim 1 is characterized in that, this separate type signal of video signal is a vertical signal (V-SYNC).
4. power control circuit according to claim 1 is characterized in that, this driving circuit includes:
One transistor;
One second resistance is connected with this transistor; And
One first electric capacity is connected with this transistor.
5. power control circuit according to claim 4 is characterized in that, more includes one first rectification circuit, in order to receive an AC power, so that this AC power rectification is become this direct supply.
6. power control circuit according to claim 5 is characterized in that, more includes a clamp circuit, in order to the voltage clamp to of this separate type signal of video signal is fixed the position in advance, includes:
One second electric capacity; And
One first diode joins with this first electric capacity.
7. power control circuit according to claim 6 is characterized in that, more includes one second rectification circuit, carries out rectification in order to this separate type signal of video signal of this clamp to one being fixed in advance the position, includes:
One second diode; And
One the 3rd electric capacity joins with this second diode.
8. power control circuit according to claim 5 is characterized in that, more includes one the 3rd resistance and one the 4th resistance of mutual series connection, is connected between this first rectification circuit and this buffer circuit.
9. power control circuit according to claim 8 is characterized in that, more includes one second electric capacity, is connected between the output terminal and earth terminal of this first rectification circuit.
10. power control circuit according to claim 5 is characterized in that, more includes one the 3rd resistance, is connected between this first rectification circuit and this buffer circuit.
11. power control circuit according to claim 10 is characterized in that, more includes one second electric capacity, is connected between the output terminal and earth terminal of this first rectification circuit.12. power control circuit according to claim 5 is characterized in that, more includes one the 3rd resistance and one the 4th resistance of mutual series connection, is connected between this first rectification circuit and this driving circuit.
13. power control circuit according to claim 5 is characterized in that, more includes one the 3rd resistance, is connected between this first rectification circuit and this driving circuit.
14. the power control circuit of a display device is characterized in that, this display device has a power module, includes:
One first signal generating circuit is exported one first signal;
One secondary signal produces circuit, is connected with this first signal generating circuit, exports a secondary signal after receiving this first signal, and this secondary signal is controlled this power module and stopped or coming into operation;
One drive circuit produces circuit with this secondary signal and is connected, receive this secondary signal after, export a direct current power supply, to start a power module;
One buffer circuit, the separate type signal of video signal of reception is also exported an enabling signal; This buffer circuit includes: a photo-coupler; And one first resistance, be connected to this photo-coupler; And
One control circuit is connected with this buffer circuit, after receiving this enabling signal, exports this direct supply, to start this power module.
15. power control circuit according to claim 14 is characterized in that, this separate type signal of video signal is a horizontal signal (H-SYNC).
16. power control circuit according to claim 14 is characterized in that, this separate type signal of video signal is a vertical signal (V-SYNC).
17. power control circuit according to claim 14 is characterized in that, more includes a mu balanced circuit, produces circuit with this first signal generating circuit and secondary signal and is connected, and is stable in order to the voltage quasi position of keeping pulse signal.
18. power control circuit according to claim 17 is characterized in that, this mu balanced circuit includes a Zener diode.
19. power control circuit according to claim 14 is characterized in that, this first signal generating circuit includes:
One switch;
One second resistance, an end is connected with this switch, and the other end is connected to earth terminal;
One the 3rd resistance, an end is connected with this switch; And
One first electric capacity is connected between the 3rd resistance and the earth terminal.
20. power control circuit according to claim 14 is characterized in that, this secondary signal produces circuit and includes a trigger.
21. power control circuit according to claim 14 is characterized in that, this driving circuit includes:
One transistor; And
One second resistance is connected with this transistor.
22. power control circuit according to claim 14 is characterized in that, more includes one second resistance and is connected between this buffer circuit and this first signal generating circuit.
23. power control circuit according to claim 14 is characterized in that, this control circuit in this power control circuit includes a transistor.
24. power control circuit according to claim 14 is characterized in that, more includes one second resistance and is connected between this control circuit and this first signal generating circuit.
25. power control circuit according to claim 14 is characterized in that, more includes one first rectification circuit, in order to receive an AC power, so that this AC power rectification is become this direct supply.
26. power control circuit according to claim 25 is characterized in that, more includes one first electric capacity, is connected between this first rectification circuit and the earth terminal.
27. power control circuit according to claim 25 is characterized in that, more includes one second resistance and one the 3rd resistance of mutual series connection, is connected between this first rectification circuit and this first signal generating circuit.
28. power control circuit according to claim 27 is characterized in that, more includes one first electric capacity, is connected between the 3rd resistance and the earth terminal.
29. power control circuit according to claim 25 is characterized in that, more includes second resistance, is connected between this first rectification circuit and this first signal generating circuit.
30. power control circuit according to claim 29 is characterized in that, more includes one first electric capacity, is connected between this second resistance and the earth terminal.
31. power control circuit according to claim 25 is characterized in that, more includes one second resistance and one the 3rd resistance of mutual series connection, is connected between this first rectification circuit and this power module.
32. power control circuit according to claim 25 is characterized in that, more includes one second resistance, is connected between this first rectification circuit and this power module.
33. power control circuit according to claim 19 is characterized in that, more includes a clamp circuit, in order to the voltage clamp to of this separate type signal of video signal is fixed the position in advance, includes:
One second electric capacity; And
One first diode is connected between this second electric capacity and the earth terminal.
34. power control circuit according to claim 33 is characterized in that, more includes one first rectification circuit, carries out rectification in order to this separate type signal of video signal of this clamp to one being fixed in advance the position, includes:
One second diode; And
One the 3rd electric capacity joins with this second diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101261531A CN100481206C (en) | 2005-11-30 | 2005-11-30 | Power-supply control circuit of display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101261531A CN100481206C (en) | 2005-11-30 | 2005-11-30 | Power-supply control circuit of display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1979631A CN1979631A (en) | 2007-06-13 |
| CN100481206C true CN100481206C (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101261531A Expired - Fee Related CN100481206C (en) | 2005-11-30 | 2005-11-30 | Power-supply control circuit of display device |
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| CN (1) | CN100481206C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI276028B (en) | 2005-11-16 | 2007-03-11 | Amtran Technology Co Ltd | Power supply control circuit of display device |
| CN104601911B (en) * | 2015-01-28 | 2018-03-27 | 青岛海信电器股份有限公司 | A kind of control circuit |
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2005
- 2005-11-30 CN CNB2005101261531A patent/CN100481206C/en not_active Expired - Fee Related
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| CN1979631A (en) | 2007-06-13 |
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Granted publication date: 20090422 Termination date: 20161130 |