CN105657941A - Backlight-source control circuit and device - Google Patents
Backlight-source control circuit and device Download PDFInfo
- Publication number
- CN105657941A CN105657941A CN201610048185.2A CN201610048185A CN105657941A CN 105657941 A CN105657941 A CN 105657941A CN 201610048185 A CN201610048185 A CN 201610048185A CN 105657941 A CN105657941 A CN 105657941A
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- China
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- resistance
- control module
- backlight
- current control
- compressive resistance
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- 230000001681 protective effect Effects 0.000 claims description 38
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention belongs to the field of circuits and provides a backlight-source control circuit and device. The backlight-source control circuit is connected with a power supply and a backlight source and comprises a current control module and an over-voltage protection module, wherein the current control module is used for providing stable current for the backlight source; the control end of the current control module is connected with the output end of a power supply and the input end of the backlight source; the input end of the current control module is connected with the output end of the backlight source, and the output end of the current control module is grounded; the over-voltage protection module is used for providing over-voltage protection for the current control module when the voltage of the output end of the backlight source is higher than a preset safety threshold; the input end and the control end of the over-voltage protection module are respectively connected with the adjusting end of the current control module and the output end of the backlight source; and the output end of the over-voltage protection module is grounded. The backlight-source control circuit and device provided by the invention have the advantages that the current and voltage of the backlight source are stable, the display effect is improved, the service life of the backlight source is prolonged and the cost of a user is saved.
Description
Technical field
The invention belongs to circuit field, particularly relate to a kind of backlight control circuit and device.
Background technology
Backlight (BackLight) is a kind of light source being positioned at liquid-crystal display (LCD) behind, and its illumination effect will directly have influence on liquid-crystal display module (LCM) vision effect. Liquid-crystal display itself is not luminous, and its shows figure or it is to the result of light modulation.
There is the situation of electric current and spread of voltage in current backlight control circuit, affects display effect, reduces the work-ing life of backlight, causes user cost to increase.
Summary of the invention
It is an object of the invention to provide a kind of backlight control circuit, it is intended to solve the problem that existing backlight control circuit exists electric current and spread of voltage.
In order to solve the problem, the present invention is achieved in that a kind of backlight control circuit, is connected with power supply and backlight, and described backlight control circuit comprises:
Current control module, for providing steady current for described backlight, the control end of described current control module is connected with the output terminal of described power supply and the input terminus of described backlight, the output terminal of backlight described in the input termination of described current control module, the output head grounding of described current control module; And
Overvoltage protective module; for when the output end voltage of backlight is higher than preset security threshold value; for described current control module provides overvoltage protection; the input terminus of described overvoltage protective module and control end are connected with the adjustable side of described current control module and the output terminal of described backlight respectively, the output head grounding of described overvoltage protective module.
Another object of the present invention is to provide a kind of backlight source control device, described backlight source control device comprises power supply, backlight and backlight control circuit, and described backlight control circuit is connected with described backlight with described power supply respectively;
Described backlight control circuit comprises:
Current control module, for providing steady current to described backlight, the control end of described current control module is connected with the output terminal of described power supply and the input terminus of described backlight, the output terminal of backlight described in the input termination of described current control module, the output head grounding of described current control module; And
Overvoltage protective module; for when backlight output end voltage is higher than preset security threshold value; for described current control module provides overvoltage protection; the input terminus of described overvoltage protective module and control end are connected with the adjustable side of described current control module and the output terminal of described backlight respectively, the output head grounding of described overvoltage protective module.
Backlight control circuit provided by the invention makes the electric current of backlight and voltage realize stable by current control module and overvoltage protective module, promotes display effect, the work-ing life of extended back light source, saves user cost.
Accompanying drawing explanation
Fig. 1 is the circuit function structure chart of the backlight control circuit that the embodiment of the present invention provides;
Fig. 2 is the circuit structure diagram of the backlight control circuit that first embodiment of the invention provides;
Fig. 3 is the circuit structure diagram of the backlight control circuit that another embodiment of the present invention provides;
Fig. 4 is the circuit structure diagram of the backlight control circuit that second embodiment of the invention provides;
Fig. 5 is the circuit structure diagram of the backlight control circuit that another embodiment of the present invention provides.
Embodiment
In order to make the object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. It is to be understood that specific embodiment described herein is only in order to explain the present invention, it is not intended to limit the present invention.
Below in conjunction with specific embodiment, the specific implementation of the present invention is described in detail:
As shown in Figure 1, in embodiments of the present invention, backlight control circuit 200 is connected with power supply 100 and backlight 300, and backlight control circuit 200 comprises:
Current control module 2001, for providing steady current for backlight 300, the control end of current control module 2001 is connected with the output terminal of power supply 100 and the input terminus of backlight, the output terminal of the input termination backlight 300 of current control module 2001, the output head grounding of current control module 2001; And
Overvoltage protective module 2002; for when the output end voltage of backlight 300 is higher than preset security threshold value; for current control module 2001 provides overvoltage protection; the input terminus of overvoltage protective module 2002 and control end are connected with the adjustable side of current control module 2001 and the output terminal of backlight 300 respectively, the output head grounding of overvoltage protective module 2002.
Embodiment one:
Fig. 2 shows the circuit structure of the backlight control circuit 200 that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to first embodiment of the invention, describes in detail as follows:
As one embodiment of the invention, current control module 2001 comprises: point compressive resistance R1, current limliting resistance R2, current limliting resistance R3, diode D11, Zener diode ZD1 and NPN type triode Q1.
The first end of point compressive resistance R1 is the control end of current control module 2001, the collector electrode of NPN type triode Q1 is the input terminus of current control module 2001, the 2nd end of compressive resistance R1 is divided to be connected with the base stage of NPN type triode Q1, the base stage of NPN type triode Q1 is the adjustable side of current control module 2001, the negative pole of Zener diode ZD1 connects the base stage of NPN type triode Q1, the positive pole of Zener diode ZD1 is connected with the positive pole of diode D1, the negative pole ground connection of diode D1, the emtting electrode of NPN type triode Q1 and the first end of current limliting resistance R2 are connected to the first end of current limliting resistance R3 altogether, 2nd end of current limliting resistance R2 and the 2nd end of current limliting resistance R3 are connected to the negative pole of diode D1 altogether, and the 2nd end of current limliting resistance R2 is the output terminal of current control module 2001. wherein, in an alternative embodiment of the invention, as shown in Figure 3, Zener diode ZD1 can also replace with the adjustable accurate shunt regulator TL431 with identical function.
As one embodiment of the invention, overvoltage protective module 2002 comprises: point compressive resistance R4, point compressive resistance R5, electric capacity C1, Zener diode ZD2 and NPN type triode Q2;
The input terminus of the transmitting of NPN type triode Q2 very overvoltage protective module 2002; the base stage of NPN type triode Q2 and the first end of electric capacity C1 are connected to point first end of compressive resistance R4 and the first end of point compressive resistance R5 altogether; 2nd end of electric capacity C1 is connected to ground altogether with the 2nd end of point compressive resistance R5; dividing the 2nd end of compressive resistance R4 to be connected with the positive pole of Zener diode ZD2, the negative pole of Zener diode ZD2 is the control end of overvoltage protective module 2002.
The principle of work of backlight control circuit 200 being described below, wherein backlight 300 is the emitting components (photodiode) of multiple series connection.
Power supply 100 input direct voltage has voltage after the dividing potential drop of emitting components after the collector electrode of NPN type triode Q1, now Zener diode DZ2 not reverse-conducting, and protection circuit does not work.
Power supply 100 negative pole at Zener diode ZD1 after point compressive resistance R1 dividing potential drop has branch pressure voltage, diode D1 forward conduction, provides a forward voltage to the base stage of NPN type triode Q1, NPN type triode Q1 is in and amplifies conducting state.
Because current limliting resistance R2, R3 have voltage at the emtting electrode of NPN type triode Q1, the resistance changing current limliting resistance R2, R3 can change the electric current flowing through backlight.
The resistance changing point compressive resistance R1 can change the electric current by emitting components equally, makes current control module reach the effect of constant current.
When there being an emitting components short circuit, the voltage of the negative pole of voltage stabilizing tube DZ2 will raise immediately, and now the voltage of the collector electrode of NPN type triode Q1 does not reach the voltage stabilizing value of Zener diode ZD2, and overvoltage protective module does not work.
When there being the words of two and above emitting components short circuit, the cathode voltage of voltage stabilizing tube DZ2 will raise immediately, the voltage of the collector electrode of NPN type triode Q1 makes Zener diode ZD2 reverse-conducting, through a point compressive resistance R4, R5 dividing potential drop, again through electric capacity C1 filtering, base stage at NPN type triode Q2 has part voltage, the collector electrode of NPN type triode Q2 is high level, now NPN type triode Q2 starts working conducting, can by the voltage pull-down to 0 of the collector electrode of NPN type triode Q2, the base potential making NPN type triode Q1 is that 0V ends, the circuit of emitting components does not become loop and stops luminescence, the effect of emitting components short circuit protection is so just served by current control module.
Embodiment two:
Fig. 4 shows the circuit structure of the backlight control circuit 200 that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to second embodiment of the invention, describes in detail as follows:
As one embodiment of the invention, current control module 2001 comprises: point compressive resistance R6, current limliting resistance R7, current limliting resistance R8, diode D2, Zener diode ZD3 and N-type MOS pipe Q3;
The first end of point compressive resistance R6 is the control end of current control module 2001, the drain electrode of N-type MOS pipe Q3 is the input terminus of current control module 2001, the 2nd end of compressive resistance R6 is divided to be connected with the grid of N-type MOS pipe Q3, the grid of N-type MOS pipe Q3 is the adjustable side of current control module 2001, the negative pole of Zener diode ZD3 connects the grid of N-type MOS pipe Q3, the positive pole of Zener diode ZD3 is connected with the positive pole of diode D2, the negative pole ground connection of diode D2, the source electrode of N-type MOS pipe Q3 and the first end of current limliting resistance R7 are connected to the first end of current limliting resistance R8 altogether, 2nd end of current limliting resistance R7 and the 2nd end of current limliting resistance R8 are connected to the negative pole of diode D2 altogether, and the 2nd end of current limliting resistance R7 is the output terminal of current control module 2001. wherein, in an alternative embodiment of the invention, as shown in Figure 5, Zener diode ZD3 can also replace with the adjustable accurate shunt regulator TL431 with identical function.
As one embodiment of the invention, overvoltage protective module 2002 comprises: point compressive resistance R9, point compressive resistance R10, electric capacity C2, Zener diode ZD4 and N-type MOS pipe Q4;
The source electrode of N-type MOS pipe Q4 is the input terminus of overvoltage protective module 2002; the grid of N-type MOS pipe Q4 and the first end of electric capacity C2 are connected to point first end of compressive resistance R9 and the first end of point compressive resistance R10 altogether; 2nd end of electric capacity C2 is connected to ground altogether with the 2nd end of point compressive resistance R10; dividing the 2nd end of compressive resistance R9 to be connected with the positive pole of Zener diode ZD4, the negative pole of Zener diode ZD4 is the control end of overvoltage protective module 2002. First embodiment of the invention and the 2nd embodiment are provided backlight control circuit 200 to be only two embodiments of the present invention, in addition, in other embodiments of the present invention, backlight control circuit 200 can adopt the current control module 2001 comprising NPN type triode Q1 and the overvoltage protective module 2002 comprising N-type MOS pipe Q4; Backlight control circuit 200 can also adopt the current control module 2001 comprising N-type MOS pipe Q3 and the overvoltage protective module 2002 comprising NPN type triode Q2.
Another object of the embodiment of the present invention is also to provide a kind of backlight source control device comprising above-mentioned backlight control circuit.
Backlight control circuit provided by the invention makes the electric current of backlight and voltage realize stable by current control module and overvoltage protective module, promotes display effect, the work-ing life of extended back light source, saves user cost.
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. done within the spirit and principles in the present invention, all should be included within protection scope of the present invention.
Claims (10)
1. a backlight control circuit, is connected with power supply and backlight, it is characterised in that, described backlight control circuit comprises:
Current control module, for providing steady current for described backlight, the control end of described current control module is connected with the output terminal of described power supply and the input terminus of described backlight, the output terminal of backlight described in the input termination of described current control module, the output head grounding of described current control module; And
Overvoltage protective module; for when the output end voltage of backlight is higher than preset security threshold value; for described current control module provides overvoltage protection; the input terminus of described overvoltage protective module and control end are connected with the adjustable side of described current control module and the output terminal of described backlight respectively, the output head grounding of described overvoltage protective module.
2. circuit as claimed in claim 1, it is characterised in that, described current control module comprises:
Divide compressive resistance R1, current limliting resistance R2, current limliting resistance R3, diode D1, Zener diode ZD1 and NPN type triode Q1;
The first end of described point of compressive resistance R1 is the control end of described current control module, the collector electrode of described NPN type triode Q1 is the input terminus of described current control module, 2nd end of described point of compressive resistance R1 is connected with the base stage of described NPN type triode Q1, the base stage of described NPN type triode Q1 is the adjustable side of described current control module, the negative pole of described Zener diode ZD1 connects the base stage of described NPN type triode Q1, the positive pole of described Zener diode ZD1 is connected with the positive pole of described diode D1, the negative pole ground connection of described diode D1, the emtting electrode of described NPN type triode Q1 and the first end of described current limliting resistance R2 are connected to the first end of described current limliting resistance R3 altogether, 2nd end of described current limliting resistance R2 and the 2nd end of described current limliting resistance R3 are connected to the negative pole of described diode D1 altogether, and the 2nd end of described current limliting resistance R2 is the output terminal of described current control module.
3. circuit as claimed in claim 1, it is characterised in that, described overvoltage protective module comprises:
Divide compressive resistance R4, point compressive resistance R5, electric capacity C1, Zener diode ZD2 and NPN type triode Q2;
The input terminus of the very described overvoltage protective module of the transmitting of described NPN type triode Q2; the base stage of described NPN type triode Q2 and the first end of described electric capacity C1 are connected to the described first end of point compressive resistance R4 and the first end of described point of compressive resistance R5 altogether; 2nd end of described electric capacity C1 and the 2nd end of described point of compressive resistance R5 are connected to ground altogether; 2nd end of described point of compressive resistance R4 is connected with the positive pole of described Zener diode ZD2, and the negative pole of described Zener diode ZD2 is the control end of described overvoltage protective module.
4. circuit as claimed in claim 1, it is characterised in that, described current control module comprises:
Divide compressive resistance R6, current limliting resistance R7, current limliting resistance R8, diode D2, Zener diode ZD3 and N-type MOS pipe Q3;
The first end of described point of compressive resistance R6 is the control end of described current control module, the drain electrode of described N-type MOS pipe Q3 is the input terminus of described current control module, 2nd end of described point of compressive resistance R6 is connected with the grid of described N-type MOS pipe Q3, the grid of described N-type MOS pipe Q3 is the adjustable side of described current control module, the negative pole of described Zener diode ZD3 connects the grid of described N-type MOS pipe Q3, the positive pole of described Zener diode ZD3 is connected with the positive pole of described diode D2, the negative pole ground connection of described diode D2, the source electrode of described N-type MOS pipe Q3 and the first end of described current limliting resistance R7 are connected to the first end of described current limliting resistance R8 altogether, 2nd end of described current limliting resistance R7 and the 2nd end of described current limliting resistance R8 are connected to the negative pole of described diode D2 altogether, and the 2nd end of described current limliting resistance R8 is the output terminal of described current control module.
5. circuit as claimed in claim 1, it is characterised in that, described overvoltage protective module comprises:
Divide compressive resistance R9, point compressive resistance R10, electric capacity C2, Zener diode ZD4 and N-type MOS pipe Q4;
The source electrode of described N-type MOS pipe Q4 is the input terminus of described overvoltage protective module; the grid of described N-type MOS pipe Q4 and the first end of described electric capacity C2 are connected to the described first end of point compressive resistance R9 and the first end of described point of compressive resistance R10 altogether; 2nd end of described electric capacity C2 and the 2nd end of described point of compressive resistance R10 are connected to ground altogether; 2nd end of described point of compressive resistance R9 is connected with the positive pole of described Zener diode ZD4, and the negative pole of described Zener diode ZD4 is the control end of described overvoltage protective module.
6. a backlight source control device, it is characterised in that, described backlight source control device comprises power supply, backlight and backlight control circuit, and described backlight control circuit is connected with described backlight with described power supply respectively;
Described backlight control circuit comprises:
Current control module, for providing steady current to described backlight, the control end of described current control module is connected with the output terminal of described power supply and the input terminus of described backlight, the output terminal of backlight described in the input termination of described current control module, the output head grounding of described current control module; And
Overvoltage protective module; for when backlight output end voltage is higher than preset security threshold value; for described current control module provides overvoltage protection; the input terminus of described overvoltage protective module and control end are connected with the adjustable side of described current control module and the output terminal of described backlight respectively, the output head grounding of described overvoltage protective module.
7. backlight source control device as claimed in claim 6, it is characterised in that, described current control module comprises:
Divide compressive resistance R1, current limliting resistance R2, current limliting resistance R3, diode D1, Zener diode ZD1 and NPN type triode Q1;
The first end of described point of compressive resistance R1 is the control end of described current control module, the collector electrode of described NPN type triode Q1 is the input terminus of described current control module, 2nd end of described point of compressive resistance R1 is connected with the base stage of described NPN type triode Q1, the base stage of described NPN type triode Q1 is the adjustable side of described current control module, the negative pole of described Zener diode ZD1 connects the base stage of described NPN type triode Q1, the positive pole of described Zener diode ZD1 is connected with the positive pole of described diode D1, the negative pole ground connection of described diode D1, the emtting electrode of described NPN type triode Q1 and the first end of described current limliting resistance R2 are connected to the first end of described current limliting resistance R3 altogether, 2nd end of described current limliting resistance R2 and the 2nd end of described current limliting resistance R3 are connected to the negative pole of described diode D1 altogether, and the 2nd end of described current limliting resistance R2 is the output terminal of described current control module.
8. backlight source control device as claimed in claim 6, it is characterised in that, described overvoltage protective module comprises:
Divide compressive resistance R4, point compressive resistance R5, electric capacity C1, Zener diode ZD2 and NPN type triode Q2;
The input terminus of the very described overvoltage protective module of the transmitting of described NPN type triode Q2; the base stage of described NPN type triode Q2 and the first end of described electric capacity C1 are connected to the described first end of point compressive resistance R4 and the first end of described point of compressive resistance R5 altogether; 2nd end of described electric capacity C1 and the 2nd end of described point of compressive resistance R5 are connected to ground altogether; 2nd end of described point of compressive resistance R4 is connected with the positive pole of described Zener diode ZD2, and the negative pole of described Zener diode ZD2 is the control end of described overvoltage protective module.
9. backlight source control device as claimed in claim 6, it is characterised in that, described current control module comprises:
Divide compressive resistance R6, current limliting resistance R7, current limliting resistance R8, diode D2, Zener diode ZD3 and N-type MOS pipe Q3;
The first end of described point of compressive resistance R6 is the control end of described current control module, the drain electrode of described N-type MOS pipe Q3 is the input terminus of described current control module, 2nd end of described point of compressive resistance R6 is connected with the grid of described N-type MOS pipe Q3, the grid of described N-type MOS pipe Q3 is the adjustable side of described current control module, the negative pole of described Zener diode ZD3 connects the grid of described N-type MOS pipe Q3, the positive pole of described Zener diode ZD3 is connected with the positive pole of described diode D2, the negative pole ground connection of described diode D2, the source electrode of described N-type MOS pipe Q3 and the first end of described current limliting resistance R7 are connected to the first end of described current limliting resistance R8 altogether, 2nd end of described current limliting resistance R7 and the 2nd end of described current limliting resistance R8 are connected to the negative pole of described diode D2 altogether, and the 2nd end of described point of compressive resistance R2 is the output terminal of described current control module.
10. backlight source control device as claimed in claim 6, it is characterised in that, described overvoltage protective module comprises:
Divide compressive resistance R9, point compressive resistance R10, electric capacity C2, Zener diode ZD4 and N-type MOS pipe Q4;
The source electrode of described N-type MOS pipe Q4 is the input terminus of described overvoltage protective module; the grid of described N-type MOS pipe Q4 and the first end of described electric capacity C2 are connected to the described first end of point compressive resistance R9 and the first end of described point of compressive resistance R10 altogether; 2nd end of described electric capacity C2 and the 2nd end of described point of compressive resistance R10 are connected to ground altogether; 2nd end of described point of compressive resistance R9 is connected with the positive pole of described Zener diode ZD4, and the negative pole of described Zener diode ZD4 is the control end of described overvoltage protective module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048185.2A CN105657941A (en) | 2016-01-26 | 2016-01-26 | Backlight-source control circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048185.2A CN105657941A (en) | 2016-01-26 | 2016-01-26 | Backlight-source control circuit and device |
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| Publication Number | Publication Date |
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| CN105657941A true CN105657941A (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610048185.2A Pending CN105657941A (en) | 2016-01-26 | 2016-01-26 | Backlight-source control circuit and device |
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| CN (1) | CN105657941A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107197569A (en) * | 2017-07-25 | 2017-09-22 | 合肥惠科金扬科技有限公司 | A kind of LED backlight Drive Protecting Circuit and display device |
| CN113685998A (en) * | 2020-05-18 | 2021-11-23 | 海信（山东）空调有限公司 | Backlight control circuit and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102833917A (en) * | 2012-08-29 | 2012-12-19 | 深圳创维－Rgb电子有限公司 | LED constant-current control circuit and LED liquid crystal television |
| US20140145635A1 (en) * | 2012-11-29 | 2014-05-29 | Power Forest Technology | Power converter control circuit |
-
2016
- 2016-01-26 CN CN201610048185.2A patent/CN105657941A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833917A (en) * | 2012-08-29 | 2012-12-19 | 深圳创维－Rgb电子有限公司 | LED constant-current control circuit and LED liquid crystal television |
| US20140145635A1 (en) * | 2012-11-29 | 2014-05-29 | Power Forest Technology | Power converter control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107197569A (en) * | 2017-07-25 | 2017-09-22 | 合肥惠科金扬科技有限公司 | A kind of LED backlight Drive Protecting Circuit and display device |
| CN113685998A (en) * | 2020-05-18 | 2021-11-23 | 海信（山东）空调有限公司 | Backlight control circuit and air conditioner |
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