CN201418037Y - Exchange type power supply device with multi-indicator lamp signal function - Google Patents
Exchange type power supply device with multi-indicator lamp signal function Download PDFInfo
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- CN201418037Y CN201418037Y CN2009200717292U CN200920071729U CN201418037Y CN 201418037 Y CN201418037 Y CN 201418037Y CN 2009200717292 U CN2009200717292 U CN 2009200717292U CN 200920071729 U CN200920071729 U CN 200920071729U CN 201418037 Y CN201418037 Y CN 201418037Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model relates to an exchange type power supply device with the multi-indicator lamp signal function, which mainly comprises an exchange type power supply circuit, an overvoltage and overcurrent protection circuit and an indicator lamp circuit, wherein the indicator lamp circuit is connected between the exchange type power supply circuit and the overvoltage protection circuit; the exchange type power supply circuit is used for providing a direct working power source for an indicator lamp; the overvoltage protection circuit is used for driving the indicator lamp circuit to reduce lamp signals according to an external switch machine signal, so that a user knows whether the exchange type power source is successfully connected with the external switch machine signal and whether thelamp signal information of a switch machine is normal is judged, thereby improving the integrating and debugging reference of a system.
Description
Technical field
The utility model relates to a kind of switched power supplier, particularly relates to the switched power supplier that a kind of tool is indicated the cresset function more.
Background technology
See also shown in Figure 4ly, be a kind of circuit diagram of existing switched power supplier, it includes:
One exchangeable type power supply circuit 50, it includes a current rectifying and wave filtering circuit, one power factor correction circuit, one direct current is to a direct-current power supply converting circuit and a signal feedback circuit, wherein this rectified wave circuit is connected to an AC power, to export a high-voltage dc signal after its rectification and the filtering to this power factor correction circuit, by power factor correction circuit voltage and current signal phase place are adjusted homophase again, improve the power factor of high-voltage dc signal, by this direct current direct-current power supply converting circuit basis signal feedback circuit is replied the change in voltage of low-voltage direct output afterwards again, and this high-voltage dc signal is given step-down, and voltage stabilizing is exported at least one group of low-voltage dc signal to corresponding low-voltage direct output;
One overvoltage circuit overcurrent protection 60, be series on the electric power loop of exchangeable type power supply circuit 50, with the voltage and the current status of the low-voltage dc signal that detects exchangeable type power supply circuit 50, even and when judgement has overvoltage and over-current state to produce exchangeable type power supply circuit stop power supply;
One indicator light circuit 70 is made up of a light-emitting diode, and this light-emitting diode connects wherein one group of low-voltage dc signal of this exchangeable type power supply circuit 50, as working power.
Because switched power supplier is used in personal computer or the industrial computer in a large number, therefore must provide the function that opens and closes by computer main frame panel control switched power supplier.The overvoltage current protecting circuit 60 of above-mentioned switched power supplier can be accepted computer main frame panel output external control signal, and according to this external control signal automatic open close exchange type power power supply 50.As for the indicator light circuit 70 of above-mentioned switched power supplier owing to only include a light-emitting diode, and this light-emitting diode directly with one group of low-voltage dc signal of this switched power supplier as working power, so when exchangeable type power supply circuit 50 is normally exported low-voltage dc signal, just can be lighted, if when exchange type power power circuit 50 no low-voltage dc signals were exported, this light-emitting diode promptly cut off; Be with, the user only can utilize the light-emitting diode point of indicator light circuit to subtract, and judges whether normal power supply of present switched power supplier, and can't judge other functional character of switched power supplier.
Just as above-mentioned explanation as can be known; computer factory is integrated into switched power supplier in the computer; as determining whether computer main frame panel can open and close switched power supplier smoothly; must import the external control signal overvoltage current protecting circuit of high electronegative potential; and after a period of time, confirm with avometer or oscilloscope whether switched power supplier still has low-voltage dc signal output again; if can't open or close switched power supplier automatically just like expection; then must carry out the debug action to computer main frame panel and switched power supplier; yet general computer factory can't only can return the supplier and confirm debug the switched power supplier debug again.Just as above-mentioned, the indication cresset of switched power supplier is only made power supply and is opened and closed indication again, thus the mistake that also can't provide computer factory to understand switched power supplier, and often prolong the computer integrated time.
Summary of the invention
Have and state the shortcoming that switched power supplier can't present the mistake cresset in view of this, the utility model provides a kind of tool to indicate the switched power supplier of cresset function more, make the user present by different cressets, judge whether switched power supplier normally finishes unlatching or bolt down procedure, help computer factory to integrate operation.
Desiring to reach the employed major technique means of above-mentioned purpose is to make this switched power supplier include:
One exchangeable type power supply circuit, include a primary side control circuit and a transformer, after wherein this primary side control circuit is converted to a high-voltage DC power supply with an AC power, provide to this transformer primary side, control transformer primary side current size makes the secondary side step-down of transformer and voltage stabilizing export at least one group of low-voltage dc signal to corresponding low-voltage direct output again;
One direct current power-switching circuit is converted to a direct current working power and a standby DC power supply with the high-voltage DC power supply step-down of this exchangeable type power supply circuit, and wherein this dc supply exports a power end of this primary side control circuit to;
One overvoltage circuit overcurrent protection, be series on the electric power loop of primary side control circuit of this direct-current power supply converting circuit and this exchangeable type power supply circuit, voltage and current status with the low-voltage dc signal that detects exchangeable type power supply circuit, and when judgement has overvoltage and over-current state to produce, control direct-current power supply converting circuit and stop to export the primary side control circuit of dc supply to exchangeable type power supply circuit, close exchangeable type power supply circuit output low-voltage dc signal simultaneously; Wherein this overvoltage circuit overcurrent protection includes a power supply status output and an external control end; And
One indicator light circuit, include an electronic switch and a light-emitting diode, wherein this electronic switch and light-emitting diode are serially connected with the standby DC power supply of this direct-current power supply converting circuit output, the control end of this electronic switch is connected to a power supply status output and an external control end of this overvoltage circuit overcurrent protection again, when the external control termination is received from the computer main frame panel shutdown signal, can make the control end of the electronic switch of indicator light circuit close, make light-emitting diode cut off, and after a period of time, no longer power as exchangeable type power supply circuit, then the output signal of the power supply status output of this overvoltage circuit overcurrent protection can change, make the control end conducting of the electronic switch of indicator light circuit, make light-emitting diode light once more; Be with, when determining motherboard, computer factory correctly sends shutdown signal to the overvoltage circuit overcurrent protection of switched power supplier, the a bit of time is lighted (being the flicker shape) cresset more again after can being cut off by script Chang Liang by light-emitting diode, and the judgement switched power supplier has been finished normal shutdown programm; Otherwise, as light-emitting diode keep normal bright or extinguish after no longer light, then all represent the switched power supplier circuit operation wrong; Debug time when therefore, the utility model can reduce computer factory integration computer main frame panel and switched power supplier.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 A and 2B are detailed circuit diagram of the present utility model;
Fig. 3 is an oscillogram of the present utility model; And
Fig. 4 is the detailed circuit diagram of existing switched power supplier.
Embodiment
Below cooperate preferred embodiment graphic and of the present utility model, further setting forth the utility model is to reach the technological means that predetermined creation purpose is taked.
See also shown in Fig. 1 and Fig. 2 A and the 2B, be the circuit block diagram of this practical case, it includes:
One exchangeable type power supply circuit 10, include a primary side control circuit and a transformer T1, after wherein this primary side control circuit is converted to a high-voltage DC power supply with an AC power, the primary side to this transformer T1 is provided, control transformer T1 primary side current size again, make the secondary side step-down of transformer T1 and voltage stabilizing export at least one group of low-voltage dc signal (+12V) (+5V) (+3.3V) to corresponding low-voltage direct output;
One direct current power-switching circuit 101, the high-voltage DC power supply step-down of this exchangeable type power supply circuit 101 is converted to a direct current working power VCCP and a standby DC power supply+5VS, and wherein this dc supply VCCP exports a power end of this primary side control circuit to;
One overvoltage circuit overcurrent protection 20, be series on the electric power loop of this direct-current power supply converting circuit 101 and the primary side control circuit of this exchangeable type power supply circuit 10, voltage and current status with the low-voltage dc signal that detects exchangeable type power supply circuit 10, and when judgement has overvoltage and over-current state to produce, control direct-current power supply converting circuit 101 and stop to export the primary side control circuit of dc supply VCCP to exchangeable type power supply circuit 10, close exchangeable type power supply circuit 10 output low-voltage dc signals simultaneously; Wherein this overvoltage circuit overcurrent protection 20 includes a power supply status output PG and an external control end ON_OFF; And
One indicator light circuit 30; include an electronic switch 32 and a light-emitting diode 31; wherein this electronic switch (NPN transistor) 32 is serially connected with standby DC power supply+5VS that this direct-current power supply converting circuit 101 is exported with light-emitting diode 31; the control end of this electronic switch 32 (base stage) is connected to the power supply status output (PG) and the external control end ON_OFF of this overvoltage circuit overcurrent protection 20 again; when the shutdown signal of external control end ON_OFF reception from computer main frame panel; can make the control end of the electronic switch 32 of indicator light circuit 30 close; make light-emitting diode 31 cut off; and the power supply status output PG of this overvoltage circuit overcurrent protection 20 changes potential state after a period of time; make the control end conducting of the electronic switch 32 of indicator light circuit 30, make light-emitting diode 31 light once more.
The primary side control circuit of above-mentioned exchangeable type power supply circuit 10 includes:
One current rectifying and wave filtering circuit 11, it is connected to an AC power, with output one high-voltage dc signal after its rectification and the filtering;
One power factor correction circuit 12, it is connected to the output of this current rectifying and wave filtering circuit 11, so that voltage and current signal phase place are adjusted homophase, improves the power factor of high-voltage dc signal; This power factor correction circuit 12 is booster circuits in present embodiment, so with boosted again back output of high-voltage dc signal;
One direct current is to direct-current power supply converting circuit 13, and the output that it is connected to this power factor correction circuit 12 gives step-down with high-voltage dc signal, and voltage stabilizing is exported at least one group of low-voltage dc signal to corresponding low-voltage direct output; And
One signal feedback circuit 14, be connected to the low-voltage direct output of this direct current to direct-current power supply converting circuit 13, the reaction of low-voltage direct output voltage is given this direct current to direct-current power supply converting circuit 13, direct-current power supply converting circuit 13 is stablized its low-voltage dc signal voltage for direct current.
In present embodiment, this power factor correction circuit 12 is shared single PWM controller M2 with this direct current to direct-current power supply converting circuit 13, also can use two PWM controller respectively, the power end VCC of this single PWM controller M2 is connected to the first dc supply output (VCCP) of this direct-current power supply converting circuit 101 by a switching circuit (102) again.
Above-mentioned direct-current power supply converting circuit 101 is connected to the output B+ of the power factor correction circuit 12 of this exchangeable type power supply circuit 10, exports after high-voltage dc signal is depressurized to a direct current working power VCCP and a standby DC power supply+5VS; This direct-current power supply converting circuit 101 is a flyback power circuit in present embodiment.Because this B+ obtains from these current rectifying and wave filtering circuit 11 outputs, so work as AC power just often, this direct-current power supply converting circuit 101 can continue to provide this standby DC power supply+5VS.
Moreover, switching circuit 102 between the above-mentioned PWM controller M2 electric power loop that is serially connected in these direct current power supply unit 101 outputs and power factor correction circuit 12 and DC power supply circuit is the power end VCC that whether the dc supply VCCP of these direct-current power supply converting circuit 101 outputs exported to this PWM controller M2 in order to decision; Again, the control end of this switching circuit 102 is connected to this overvoltage current protecting circuit 20, by the keying of these overvoltage current protecting circuit 20 determine switch circuit 102.In present embodiment, this switching circuit 102 mainly is made up of an electronic switch (PNP transistor) 1021, and its base stage is control end and controls signal to base stage when this overvoltage current protecting circuit 20 output electronegative potentials, and this electronic switch is with not conducting; At this moment, be serially connected with the not conducting electronic switch 1021 between this direct current power supply unit 101 output VCCP and the PWM controller M2 working power end VCC, promptly interrupt the working power of PWM controller M2.
Again, above-mentioned overvoltage current protecting circuit 20 includes: a controller M1, a RC filter circuit R51/C30 and a buffer circuit M8.
Above-mentioned this controller M1 can be WT7515 model or WT7527 model integrated circuit; present embodiment adopts WT7527 model integrated circuit that it is described, it includes the good output PGO of a power supply (PIN16), an external signal input PSONB (PIN 4), a power supply detects end PGI, a voltage induced end VS12A, an induction by current end IS12A and an error protection output FPOB (PIN3).Wherein the good output PGO of this power supply (PIN16) is by a RC circuit (R32; C27) be connected to above-mentioned power supply status output PG; this external signal input PSONB (PIN 4) then is connected to said external control end ON_OFF; this power supply detects end PGI is connected to transformer T1 in the DC power supply circuit 13 that exchanges power circuit 10 by this RC filter circuit R51/C30 secondary side again; to obtain the size of current of present secondary side; again this voltage induced end VS12A and induction by current end IS12A be connected to the DC power supply circuit 13 of exchangeable type power supply circuit 10 wherein one group of low-voltage direct output (+12V); with output voltage and the size of current that obtains present switched power supplier 10, this error protection output FPOB then is connected to this buffer circuit M8.This buffer circuit M8 is an optical coupler in present embodiment, and this error protection output FPOB is connected to the light-emitting diode of this buffer circuit M8, and the photistor of this buffer circuit M8 then is connected to the control end of this switching circuit 102; This external control end ON_OFF is then for the external control signal input in addition.See also shown in Figure 3, when this external control signal ON_OFF will input to this external signal input PSONB from the shutdown of motherboard one electronegative potential after a period of time, this error protection output FPOB can export an electronegative potential control signal, again after a period of time, the good output PG of this power supply no longer is connected to electronegative potential (ground connection), this moment, this PG can be by the RC circuit to (R32 C27) is connected to+the 5VS high potential signal; In addition, when power supply detected end PGI, voltage induced end VS12A, induction by current end IS12A or the change of external control end ON_OFF state, this error protection output FPOB can be by the control signal of buffer circuit M8 output height different potentials.
Please consult Fig. 2 A, 2B and Fig. 3 simultaneously, when switched power supplier 10 normal power supplies, the good output PGO of the power supply of this controller M1 exports a low-potential signal, and this external control end PSONB is a high potential signal, therefore this electronic switch 32 is conducting, makes light-emitting diode 31 Chang Liang.In case external control end ON_OFF receive from computer main frame panel ON_OFF end off signal (low-potential signal), this moment is because power supply status output PG still exports a low-potential signal, and make and the i.e. no longer conducting of electronic switch 32 make light-emitting diode 31 cut off.Simultaneously; the error protection output FPOB of this controller M1 can export an electronegative potential control signal; make the light-emitting diode of optical coupler M8 light; and photistor conducting ground connection; cause the no longer conducting of electronic switch 1021 of switching circuit 102; so this direct-current power supply converting circuit 101 can't be powered and be given this PWM controller M2, so the DC power supply circuit 13 of exchangeable type power supply circuit 10 can't out-put supply.This moment, the power supply of this controller M1 detected when holding PGI to transfer electronegative potential to by high potential, promptly detect DC power supply circuit 13 and be low current condition, and make the good output PGO of power supply no longer export a low-potential signal, and the electronic switch 32 of this indicator light circuit 30 is promptly by RC circuit (R32, C27) be connected to high potential and conducting once more, because this direct-current power supply converting circuit 101 still continues standby DC power supply+5VS is provided, so make light-emitting diode 31 light once more.Therefore, when determining that motherboard ON_OFF rectifies, computer factory really sends shutdown signal to the overvoltage circuit overcurrent protection 20 of switched power supplier, can be by judging that light-emitting diode 31 cut off a bit of time of back by script Chang Liang and light (being the flicker shape) cresset more again, learn that switched power supplier 10 finished normal shutdown programm; Otherwise, as light-emitting diode 31 keep normal bright or extinguish after no longer light, then all represent switched power supplier 10 circuit operations wrong; Debug time when therefore, the utility model can reduce computer factory integration computer main frame panel and switched power supplier.
The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in the scope that does not break away from technical solutions of the utility model, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (11)
1. a tool is indicated the switched power supplier of cresset function more, it is characterized in that it includes:
One exchangeable type power supply circuit, include a primary side control circuit and a transformer, after wherein this primary side control circuit is converted to a high-voltage DC power supply with an AC power, provide to this transformer primary side, control transformer primary side current size makes the secondary side step-down of transformer and voltage stabilizing export at least one group of low-voltage dc signal to corresponding low-voltage direct output again;
One direct current power-switching circuit is converted to a direct current working power and a standby DC power supply with the high-voltage DC power supply step-down of this exchangeable type power supply circuit, and wherein this dc supply exports a power end of this primary side control circuit to;
One overvoltage circuit overcurrent protection, be series on the electric power loop of primary side control circuit of this direct-current power supply converting circuit and this exchangeable type power supply circuit, voltage and current status with the low-voltage dc signal that detects exchangeable type power supply circuit, and when judgement has overvoltage and over-current state to produce, control direct-current power supply converting circuit and stop to export the primary side control circuit of dc supply to exchangeable type power supply circuit, close exchangeable type power supply circuit output low-voltage dc signal simultaneously; Wherein this overvoltage circuit overcurrent protection includes a power supply status output and an external control end; And
One indicator light circuit, include an electronic switch and a light-emitting diode, wherein this electronic switch and light-emitting diode are serially connected with the standby DC power supply of this direct-current power supply converting circuit output, and the control end of this electronic switch is connected to the power supply status output and the external control end of this overvoltage circuit overcurrent protection again; When the external control termination is received a shutdown signal; the electronic switch control light-emitting diode of this indicator light circuit changes state; and the power supply status output of this overvoltage circuit overcurrent protection changes potential state after a period of time, makes the electronic switch of this indicator light circuit can change the light-emitting diode state once more.
2. tool according to claim 1 is indicated the switched power supplier of cresset function more, it is characterized in that, the electronic switch of this indicator light circuit is a NPN transistor, and its base stage is a control end.
3. tool according to claim 1 and 2 is indicated the switched power supplier of cresset function more, it is characterized in that, this exchangeable type power supply circuit includes:
One current rectifying and wave filtering circuit, it is connected to an AC power, with output one high-voltage dc signal after its rectification and the filtering;
One power factor correction circuit, it is connected to the output of this current rectifying and wave filtering circuit, so that voltage and current signal phase place are adjusted homophase, improves the power factor of high-voltage dc signal;
One direct current is to direct-current power supply converting circuit, and the output that it is connected to this power factor correction circuit gives step-down with high-voltage dc signal, and voltage stabilizing is exported at least one group of low-voltage dc signal to corresponding low-voltage direct output; And
One signal feedback circuit, it is connected to the low-voltage direct output of this direct current to direct-current power supply converting circuit, and the reaction of low-voltage direct output voltage is given this direct current to direct-current power supply converting circuit, stablizes its low-voltage dc signal voltage for direct-current power supply converting circuit.
4. tool according to claim 3 is indicated the switched power supplier of cresset function more, it is characterized in that, this power factor correction circuit is a booster circuit.
5. tool according to claim 4 is indicated the switched power supplier of cresset function more, it is characterized in that the dc supply output of this direct-current power supply converting circuit is connected to the power end of a PWM controller of this power factor correction circuit by a switching circuit.
6. tool according to claim 5 is indicated the switched power supplier of cresset function more, it is characterized in that, this direct-current power supply converting circuit is a flyback power circuit.
7. tool according to claim 6 is indicated the switched power supplier of cresset function more, it is characterized in that, this overvoltage current protecting circuit includes:
One controller includes a power supply and detects end, a voltage induced end, an induction by current end, an error protection output, the good output of this power supply and this external signal input; Wherein this power supply detects end is connected to the exchange power circuit by a RC filter circuit DC power supply circuit, this induction by current end is connected to wherein one group of low-voltage direct output of the DC power supply circuit of exchangeable type power supply circuit again, this error protection output then is connected to this switching circuit by a buffer circuit, the good output of this power supply is connected to this power supply status output by a RC circuit, and this external signal input then is connected with this external control end; Wherein detect end, voltage induced end, induction by current end or external signal input state when changing when power supply; this error protection output can be by the control signal of this buffer circuit output height different potentials, whether exports the dc supply of this direct-current power supply converting circuit to this power factor correction circuit and DC power supply circuit with decision.
8. tool according to claim 7 is indicated the switched power supplier of cresset function more; it is characterized in that; this buffer circuit is an optical coupler; and this error protection output is connected to the light-emitting diode of this buffer circuit, and the control end of the electronic switch of this switching circuit is connected to the photistor of the buffer circuit of this signal monitoring unit.
9. tool according to claim 8 is indicated the switched power supplier of cresset function more, it is characterized in that, this electronic switch is a PNP transistor, and its base stage is connected to the photistor of this optical coupler.
10. tool according to claim 9 is indicated the switched power supplier of cresset function more, it is characterized in that, this controller is WT7515 model or WT7527 model integrated circuit.
11. tool according to claim 10 is indicated the switched power supplier of cresset function more; it is characterized in that; the shutdown signal that this external control termination is received is a low-potential signal; and after postponing a period of time; this error protection output is exported an electronegative potential control signal; after postponing a period of time again, this power supply status output is exported a high potential state signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200717292U CN201418037Y (en) | 2009-05-07 | 2009-05-07 | Exchange type power supply device with multi-indicator lamp signal function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200717292U CN201418037Y (en) | 2009-05-07 | 2009-05-07 | Exchange type power supply device with multi-indicator lamp signal function |
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| Publication Number | Publication Date |
|---|---|
| CN201418037Y true CN201418037Y (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200717292U Expired - Fee Related CN201418037Y (en) | 2009-05-07 | 2009-05-07 | Exchange type power supply device with multi-indicator lamp signal function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877475A (en) * | 2010-06-28 | 2010-11-03 | 广州视景显示技术研发有限公司 | Power supply short-circuit protection circuit |
| CN102159008A (en) * | 2011-03-07 | 2011-08-17 | 广东威创视讯科技股份有限公司 | Large-current fast transformation high-transient-response power supply |
| CN106160484A (en) * | 2015-04-13 | 2016-11-23 | 康舒科技股份有限公司 | The power supply circuit of tool low output voltage defencive function |
| CN106340853A (en) * | 2016-08-25 | 2017-01-18 | 成都优购科技有限公司 | Bluetooth module with indicator lamp |
| WO2019218477A1 (en) * | 2018-05-14 | 2019-11-21 | 武汉华星光电半导体显示技术有限公司 | Rotection circuit and display panel |
| US10778004B2 (en) | 2018-05-14 | 2020-09-15 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Protection circuit and display panel |
-
2009
- 2009-05-07 CN CN2009200717292U patent/CN201418037Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877475A (en) * | 2010-06-28 | 2010-11-03 | 广州视景显示技术研发有限公司 | Power supply short-circuit protection circuit |
| CN101877475B (en) * | 2010-06-28 | 2012-11-21 | 广州视景显示技术研发有限公司 | Power supply short-circuit protection circuit |
| CN102159008A (en) * | 2011-03-07 | 2011-08-17 | 广东威创视讯科技股份有限公司 | Large-current fast transformation high-transient-response power supply |
| CN106160484A (en) * | 2015-04-13 | 2016-11-23 | 康舒科技股份有限公司 | The power supply circuit of tool low output voltage defencive function |
| CN106160484B (en) * | 2015-04-13 | 2018-07-27 | 康舒科技股份有限公司 | Has the power supply circuit of low output voltage defencive function |
| CN106340853A (en) * | 2016-08-25 | 2017-01-18 | 成都优购科技有限公司 | Bluetooth module with indicator lamp |
| WO2019218477A1 (en) * | 2018-05-14 | 2019-11-21 | 武汉华星光电半导体显示技术有限公司 | Rotection circuit and display panel |
| US10778004B2 (en) | 2018-05-14 | 2020-09-15 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Protection circuit and display panel |
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