CN106205505A - Backlight drive circuit - Google Patents
Backlight drive circuit Download PDFInfo
- Publication number
- CN106205505A CN106205505A CN201610710426.5A CN201610710426A CN106205505A CN 106205505 A CN106205505 A CN 106205505A CN 201610710426 A CN201610710426 A CN 201610710426A CN 106205505 A CN106205505 A CN 106205505A
- Authority
- CN
- China
- Prior art keywords
- unit
- resistance
- side winding
- switch element
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The present invention carries a kind of backlight drive circuit, including: input block, transformer unit, at least two output unit, control unit, the first switch element and feedback unit, transformer unit includes a primary side winding and at least two vice-side winding；Input block is connected with one end of described primary side winding, and the input of the first switch element is connected with the other end of primary side winding, and the control end of the first switch element is connected with control unit；At least two output unit is connected correspondingly with at least two vice-side winding respectively, each output unit is connected with a luminescence unit respectively, each output unit is all connected with feedback unit with the common node of luminescence unit, and described feedback unit is connected with described control unit；Described control unit for controlling the dutycycle of the first switch element according to the information of voltage of feedback unit feedback.The present invention has the beneficial effect reducing cost.
Description
Technical field
The present invention relates to field of liquid crystal display, particularly relate to a kind of backlight drive circuit.
Background technology
WGB LED-backlit has high penetrance, can reduce backlight power consumption.At present, television backlight just it is being widely used in
On, owing to the conducting voltage of W (white) LED and G (green) LED is different, if W (white) LED is that 50V, G (green) LED is
30V, in order to provide two kinds of different voltages, needs to use two booster circuits to provide, causes circuit structure more complicated.
Therefore, prior art existing defects, need to improve.
Summary of the invention
It is an object of the invention to provide the backlight drive circuit of a kind of improvement.
For solving the problems referred to above, the technical scheme that the present invention provides is as follows: a kind of backlight drive circuit, including: input is single
Unit, transformer unit, at least two output unit, control unit, the first switch element and feedback unit, described transformator list
Unit includes a primary side winding and at least two vice-side winding；
Described input block is connected with one end of described primary side winding, and the input of described first switch element is former with described
The other end of limit winding connects, the output head grounding of described first switch element, the control end of described first switch element and institute
State control unit to connect；
Described at least two output unit is connected correspondingly with described at least two vice-side winding respectively, each described
Output unit is connected with a luminescence unit respectively, the common node of each described output unit and luminescence unit all with described feedback
Unit connects, and described feedback unit is connected with described control unit；Described control unit is for feeding back according to described feedback unit
Information of voltage control described first switch element dutycycle, the coil turn of each vice-side winding be respectively predetermined value thus
Make the voltage that the output unit output of correspondence is corresponding.
In backlight drive circuit of the present invention, also include at least two the first detector unit and at least two
Two switch elements；Luminescence unit described in the input and of each described second switch unit connects, each described second switch
The outfan of unit is connected with the first detector unit described in described respectively, and each described first detector unit controls list with described
Unit connects；
Described control unit controls corresponding described for the information of voltage detected according to each described first detector unit
The dutycycle of second switch unit.
In backlight drive circuit of the present invention, described first detector unit includes the first resistance, described first electricity
One end of resistance is connected with the outfan of described second switch unit, the other end ground connection of described first resistance, described first resistance
It is connected with described control unit with the common node of described second switch unit.
In backlight drive circuit of the present invention, the quantity of described output unit is two, described feedback unit bag
Include three end adjustable shunt reference sources, optocoupler, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, institute
Stating the 5th resistance in parallel with the luminous organ of described optocoupler, one end of described 3rd resistance and one end of described second resistance connect
In the common node of output unit described in Yu described luminescence unit, the other end of described 3rd resistance and described 5th resistance
One end connects, and the other end of described 5th resistance is connected with the negative pole of described three end adjustable shunt reference sources, described second resistance
The other end be connected with one end of described 6th resistance, the described 6th resistance other end and described three end adjustable shunt reference sources
Positive pole connects and ground connection, and one end of described 4th resistance connects with the common node of another described output unit with described luminescence unit
Connecing, the other end of described 4th resistance is connected with the common node of described second resistance with described 6th resistance, and described three ends can
The adjustable side adjusting shunt reference source is connected with the common node of described second resistance with described 6th resistance；
One end of the light-receiving device of described optocoupler is connected with described control unit, another termination of the light-receiving device of described optocoupler
Ground.
In backlight drive circuit of the present invention, also include that the second detector unit, described second detector unit include
7th resistance, the outfan of described first switch element passes through described 7th resistance eutral grounding, described 7th resistance and described first
The common node of switch element is connected with described control unit；
Described control unit for the voltage that detects according to described second detector unit more than a threshold value time, control described
First switch element cut-off.
In backlight drive circuit of the present invention, also including Anti-surging unit, described Anti-surging unit is former with described
The two ends of limit winding are in parallel.
In backlight drive circuit of the present invention, described Anti-surging unit include the first electric capacity, the 8th resistance and
First diode, described one end of 8th resistance is connected with the common node of described primary side winding with described input block, described
The other end of the 8th resistance is connected with the negative pole of described first diode, described first electric capacity and described 8th resistor coupled in parallel, institute
The common node of the positive pole and described primary side winding with described first switch element of stating the first diode is connected.
In backlight drive circuit of the present invention, described input block includes rectifier bridge, filter capacitor and input
Electric capacity, the input of described rectifier bridge accesses input voltage, and the outfan of described rectifier bridge connects with one end of described primary side winding
Connecing, one end of described input capacitance is connected at the common node of described rectifier bridge and described primary side winding, described input capacitance
Other end ground connection, described filter capacitor is in parallel with described input capacitance.
In backlight drive circuit of the present invention, described output unit include the second diode, the 3rd diode with
And output capacitance, the positive pole of described second diode and described 3rd diode all one end with described vice-side winding are connected,
The other end ground connection of described vice-side winding, the negative pole of described second diode and described 3rd diode connect and with institute
Stating luminescence unit to connect, one end of described output capacitance is connected to described second diode, the 3rd diode and luminescence unit
Common node at, the other end ground connection of described output capacitance.
In backlight drive circuit of the present invention, described first switch element is field-effect transistor.
From the foregoing, it will be observed that the present invention provide backlight drive circuit by transformer unit arrange at least two secondary around
Group, each vice-side winding and an output unit connect, and by controlling the number of turn of vice-side winding so that at least two can be exported
The predetermined voltage that road needs, it is not necessary to use at least two-way booster circuit to boost thus obtain the output electricity that at least two-way is different
Pressure, eliminates boost inductance and relative electronic components thereof, has cost-effective beneficial effect.
Accompanying drawing explanation
Fig. 1 is the structure chart of the backlight drive circuit in first preferred embodiment of the invention.
Fig. 2 is the circuit theory diagrams of the backlight drive circuit in second preferred embodiment of the invention.
Detailed description of the invention
The explanation of following embodiment is particular implementation that is graphic with reference to add, that implement in order to illustrate the present invention may be used to
Example.The direction term that the present invention is previously mentioned, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side "
Deng, it is only the direction with reference to annexed drawings.Therefore, the direction term of use is to illustrate and understand the present invention, and is not used to
Limit the present invention.
In the drawings, the module that structure is similar is to represent with identical label.
Refer to Fig. 1, in first preferred embodiment of the present invention, this backlight drive circuit, including: input block 101,
Transformer unit 102, at least two output unit 103, control unit the 106, first switch element 105 and feedback unit 104,
Described transformer unit 102 includes a primary side winding and at least two vice-side winding.
Wherein, input block 101 is connected with one end of the primary side winding of described transformer unit 102, described first switch
The input of unit 105 is connected with the other end of the primary side winding of described transformer unit 102, described first switch element 105
Output head grounding, the control end of described first switch element 105 is connected with described control unit 106.This at least two exports
Unit 103 is connected correspondingly with at least two vice-side winding of transformer unit 102 respectively.Each described output unit divides
103 are not connected with a luminescence unit 200, each described output unit 103 and the common node of luminescence unit 200 all with described instead
Feedback unit 104 connects, and described feedback unit 104 is connected with described control unit 106；Described control unit 106 is for according to institute
The information of voltage stating feedback unit 104 feedback controls the dutycycle of described first switch element 105, the coil of each vice-side winding
The number of turn is respectively predetermined value so that the output unit 103 of correspondence exports the voltage of correspondence to luminescence unit 200.
Wherein, this luminescence unit 200 is the backlight of backlight module, and it is formed by multiple light emitting diodes concatenation.
Refer to Fig. 2, in second preferred embodiment of the present invention, on the basis of first embodiment, this backlight drive
Circuit also include an Anti-surging unit 107, at least two second switch unit 108, at least two the first detector unit 109, with
And second detector unit 110.This control unit includes the first control unit 1061 and the second control unit 1062.
Wherein, luminescence unit 200 described in the input and of each second switch unit 108 connects, and each described second
The outfan of switch element 108 is connected with the first detector unit 109 described in described respectively, each described first detector unit
109 are connected with the second control unit 1062 of described control unit 106；
Second control unit 1062 of this control unit 106 is for detecting according to each described first detector unit 109
Information of voltage control corresponding described second switch unit 108 dutycycle.Wherein, this first detector unit 109 includes first
Resistance R1, one end of described first resistance R1 is connected with the outfan of described second switch unit 108, described first resistance R1's
Other end ground connection, the of the common node of described first resistance R1 and described second switch unit 108 and described control unit 106
Two control units 1062 connect.
In the present embodiment, the quantity of described output unit 103 is two, is certainly not limited to this.Described feedback unit
104 include three end adjustable shunt reference source Q3, optocoupler U1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance
R5 and the 6th resistance R6, described 5th resistance R5 are in parallel with the luminous organ of described optocoupler U1, one end of described 3rd resistance R3
And one end of described second resistance R2 is connected to the common node of output unit 103 described in one and described luminescence unit 200, institute
One end of the other end and described 5th resistance R5 of stating the 3rd resistance R3 is connected, the other end and described three of described 5th resistance R5
The negative pole of end adjustable shunt reference source Q3 connects, and the other end of described second resistance R2 connects with one end of described 6th resistance R6
Connecing, the described 6th resistance R6 other end is connected with the positive pole of described three end adjustable shunt reference source Q3 and ground connection, described 4th electricity
One end of resistance R4 is connected with the common node of output unit another described 103 with described luminescence unit 200, described 4th resistance R4
The other end be connected with the common node of described second resistance R2 and described 6th resistance R6, described three end adjustable shunt reference sources
The adjustable side of Q3 is connected with the common node of described second resistance R2 and described 6th resistance R6；The light-receiving device of described optocoupler U1
One end is connected with the first control unit 1061 of described control unit 106, the other end ground connection of the light-receiving device of described optocoupler U1.
This second detector unit 110 includes the 7th resistance R7, and the outfan of described first switch element 105 is by described the
The common node of seven resistance R7 ground connection, described 7th resistance R7 and described first switch element 105 and described control unit 106
First switch element 1061 connects；First control unit 1061 of described control unit 106 is for single according to described second detection
When the voltage that unit 110 detects is more than a threshold value, controls described first switch element 105 and end, thus reach protection circuit
Effect.
This Anti-surging unit 107 is in parallel with the two ends of the primary side winding of described transformer unit 102.This Anti-surging unit
107 include the first electric capacity C1, the 8th resistance R8 and the first diode D1, one end of described 8th resistance R8 and described former limit around
Group is connected with the common node of described input block 101, and the other end of described 8th resistance R8 is with described first diode D1's
Negative pole connects, and described first electric capacity C1 is in parallel with described 8th resistance R8, the positive pole of described first diode D1 and described former limit
Winding is connected with the common node of described first switch element 105.
This input block 101 includes rectifier bridge B, filter capacitor C2 and input capacitance Cin, the input of described rectifier bridge B
Terminating into input voltage, the outfan of described rectifier bridge B is connected with one end of the primary side winding of transformer unit 102, described defeated
The one end entering electric capacity Cin is connected at the common node of described rectifier bridge B and described primary side winding, described input capacitance Cin
Other end ground connection, described filter capacitor C2 is in parallel with described input capacitance Cin.
This each output unit 103 includes the second diode D2, the 3rd diode D3 and output capacitance Cout, described
The positive pole of two diode D2 and described 3rd diode D3 is all with one end of the vice-side winding of described transformer unit 102 even
Connect, the other end ground connection of described vice-side winding.The negative pole of described second diode D2 and described 3rd diode D3 is even
Connecing and be connected with a luminescence unit 200, one end of output capacitance Cout is connected to described second diode D2, the 3rd diode D3
And at the common node of luminescence unit 200, the other end ground connection of described output capacitance Cout.
Specifically, this first switch element 105 is the first field-effect transistor Q1, and this second switch unit 108 is second
Field-effect transistor Q2.
From the foregoing, it will be observed that the present invention provide backlight drive circuit by transformer unit arrange at least two secondary around
Group, each vice-side winding and an output unit connect, and by controlling the number of turn of vice-side winding so that at least two can be exported
The predetermined voltage that road needs, it is not necessary to use at least two-way booster circuit to boost thus obtain the output electricity that at least two-way is different
Pressure, eliminates boost inductance and relative electronic components thereof, has cost-effective beneficial effect.
In sum, although the present invention is disclosed above with preferred embodiment, but above preferred embodiment and be not used to limit
The present invention processed, those of ordinary skill in the art, without departing from the spirit and scope of the present invention, all can make various change and profit
Decorations, therefore protection scope of the present invention defines in the range of standard with claim.
Claims (10)
1. a backlight drive circuit, it is characterised in that including: input block, transformer unit, at least two output unit,
Control unit, the first switch element and feedback unit, described transformer unit includes a primary side winding and at least two
Vice-side winding；
Described input block is connected with one end of described primary side winding, the input of described first switch element and described former limit around
The other end of group connects, the output head grounding of described first switch element, the control end of described first switch element and described control
Unit processed connects；
Described at least two output unit is connected correspondingly with described at least two vice-side winding respectively, each described output
Unit is connected with a luminescence unit respectively, the common node of each described output unit and luminescence unit all with described feedback unit
Connecting, described feedback unit is connected with described control unit；Described control unit is for the electricity fed back according to described feedback unit
Pressure information control described first switch element dutycycle, the coil turn of each vice-side winding be respectively predetermined value so that
The voltage that corresponding output unit output is corresponding.
Backlight drive circuit the most according to claim 1, it is characterised in that also include at least two the first detector unit with
And at least two second switch unit；Luminescence unit described in the input and of each described second switch unit connects, each
The outfan of described second switch unit is connected with the first detector unit described in described respectively, each described first detector unit
It is connected with described control unit；
Described control unit controls corresponding described second for the information of voltage detected according to each described first detector unit
The dutycycle of switch element.
Backlight drive circuit the most according to claim 2, it is characterised in that described first detector unit includes the first electricity
Resistance, one end of described first resistance is connected with the outfan of described second switch unit, the other end ground connection of described first resistance,
Described first resistance is connected with described control unit with the common node of described second switch unit.
Backlight drive circuit the most according to claim 1, it is characterised in that the quantity of described output unit is two, institute
State feedback unit include three end adjustable shunt reference sources, optocoupler, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and
6th resistance, described 5th resistance is in parallel with the luminous organ of described optocoupler, one end of described 3rd resistance and described second electricity
One end of resistance is connected to the common node of output unit described in one and described luminescence unit, the other end of described 3rd resistance and institute
The one end stating the 5th resistance connects, and the other end of described 5th resistance is connected with the negative pole of described three end adjustable shunt reference sources,
The other end of described second resistance is connected with one end of described 6th resistance, and the described 6th resistance other end is adjustable with described three ends
The positive pole of shunt reference source connects and ground connection, one end of described 4th resistance and another described output unit and described luminescence unit
Common node connect, the common node of the other end of described 4th resistance and described second resistance and described 6th resistance is even
Connecing, the adjustable side of described three end adjustable shunt reference sources is connected with the common node of described second resistance with described 6th resistance；
One end of the light-receiving device of described optocoupler is connected with described control unit, the other end ground connection of the light-receiving device of described optocoupler.
Backlight drive circuit the most according to claim 1, it is characterised in that also include the second detector unit, described second
Detector unit includes the 7th resistance, and the outfan of described first switch element passes through described 7th resistance eutral grounding, described 7th electricity
Resistance is connected with described control unit with the common node of described first switch element；
Described control unit for the voltage that detects according to described second detector unit more than a threshold value time, control described first
Switch element ends.
Backlight drive circuit the most according to claim 1, it is characterised in that also include Anti-surging unit, described Anti-surging
Unit is in parallel with the two ends of described primary side winding.
Backlight drive circuit the most according to claim 6, it is characterised in that described Anti-surging unit include the first electric capacity,
8th resistance and the first diode, one end of described 8th resistance and described primary side winding and the public joint of described input block
Point connects, and the other end of described 8th resistance is connected with the negative pole of described first diode, described first electric capacity and the described 8th
Resistor coupled in parallel, the positive pole of described first diode is connected with the common node of described primary side winding with described first switch element.
Backlight drive circuit the most according to claim 1, it is characterised in that described input block includes rectifier bridge, filtering
Electric capacity and input capacitance, the input of described rectifier bridge accesses input voltage, the outfan of described rectifier bridge and described former limit
One end of winding connects, and one end of described input capacitance is connected at the common node of described rectifier bridge and described primary side winding,
The other end ground connection of described input capacitance, described filter capacitor is in parallel with described input capacitance.
Backlight drive circuit the most according to claim 1, it is characterised in that described output unit include the second diode,
3rd diode and output capacitance, the positive pole of described second diode and described 3rd diode all with described vice-side winding
One end connect, the other end ground connection of described vice-side winding, described second diode and described 3rd diode negative
Pole connects and is connected with described luminescence unit, and one end of described output capacitance is connected to described second diode, the 3rd diode
And at the common node of luminescence unit, the other end ground connection of described output capacitance.
Backlight drive circuit the most according to claim 1, it is characterised in that described first switch element is that field effect is brilliant
Body pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610710426.5A CN106205505B (en) | 2016-08-23 | 2016-08-23 | Backlight drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610710426.5A CN106205505B (en) | 2016-08-23 | 2016-08-23 | Backlight drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106205505A true CN106205505A (en) | 2016-12-07 |
| CN106205505B CN106205505B (en) | 2018-09-04 |
Family
ID=57524051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610710426.5A Active CN106205505B (en) | 2016-08-23 | 2016-08-23 | Backlight drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106205505B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710532A (en) * | 2017-02-20 | 2017-05-24 | 深圳市华星光电技术有限公司 | Backlight drive circuit and liquid-crystal display |
| WO2018126493A1 (en) * | 2017-01-04 | 2018-07-12 | 深圳市华星光电技术有限公司 | Led backlight driving circuit and liquid crystal display |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001037411A2 (en) * | 1999-11-19 | 2001-05-25 | Iwatt | Isolated power converter having primary feedback control |
| CN101034533A (en) * | 2006-03-08 | 2007-09-12 | 奇景光电股份有限公司 | Driving circuit for backlight module and the display panel with the same |
| CN201984786U (en) * | 2011-01-28 | 2011-09-21 | 福建捷联电子有限公司 | LED (light-emitting diode) backlight current-sharing circuit adopting capacitors for balancing |
| CN102665347A (en) * | 2012-05-09 | 2012-09-12 | 福建捷联电子有限公司 | Highly-efficient drive circuit of light emitting diode (LED) Light Bars |
| CN103281823A (en) * | 2013-05-08 | 2013-09-04 | 矽力杰半导体技术(杭州)有限公司 | Constant current and constant voltage output multi-channel power supply system |
| CN105813263A (en) * | 2016-04-22 | 2016-07-27 | 深圳创维－Rgb电子有限公司 | Switching power supply and television |
-
2016
- 2016-08-23 CN CN201610710426.5A patent/CN106205505B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001037411A2 (en) * | 1999-11-19 | 2001-05-25 | Iwatt | Isolated power converter having primary feedback control |
| CN101034533A (en) * | 2006-03-08 | 2007-09-12 | 奇景光电股份有限公司 | Driving circuit for backlight module and the display panel with the same |
| CN201984786U (en) * | 2011-01-28 | 2011-09-21 | 福建捷联电子有限公司 | LED (light-emitting diode) backlight current-sharing circuit adopting capacitors for balancing |
| CN102665347A (en) * | 2012-05-09 | 2012-09-12 | 福建捷联电子有限公司 | Highly-efficient drive circuit of light emitting diode (LED) Light Bars |
| CN103281823A (en) * | 2013-05-08 | 2013-09-04 | 矽力杰半导体技术(杭州)有限公司 | Constant current and constant voltage output multi-channel power supply system |
| CN105813263A (en) * | 2016-04-22 | 2016-07-27 | 深圳创维－Rgb电子有限公司 | Switching power supply and television |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018126493A1 (en) * | 2017-01-04 | 2018-07-12 | 深圳市华星光电技术有限公司 | Led backlight driving circuit and liquid crystal display |
| US10448468B2 (en) | 2017-01-04 | 2019-10-15 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | LED backlight driving circuit and liquid crystal display |
| CN106710532A (en) * | 2017-02-20 | 2017-05-24 | 深圳市华星光电技术有限公司 | Backlight drive circuit and liquid-crystal display |
| CN106710532B (en) * | 2017-02-20 | 2019-03-26 | 深圳市华星光电技术有限公司 | A kind of backlight drive circuit and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106205505B (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101916548B (en) | Control circuit of light-emitting diode (LED) lamp tube of liquid crystal display | |
| CN106910474B (en) | A kind of short-circuit protection circuit and backlight drive circuit | |
| CN103401209A (en) | LED (light emitting diode) backlight short-circuit protection circuit | |
| CN103384436A (en) | Light-emitting diode (LED) backlight constant-current circuit | |
| CN106658838A (en) | Lighting device, control chip, linear dimming system and linear dimming method | |
| CN106205505A (en) | Backlight drive circuit | |
| US9966757B2 (en) | Over-voltage protection circuit and electronic device | |
| CN104966494A (en) | LED driving circuit for display screen back lighting | |
| CN204377212U (en) | LED drive system | |
| CN100530320C (en) | Electric voltage detecting circuit and electric discharge lamp driven apparatus using same | |
| CN207217083U (en) | A kind of backlight regulation protection circuit, liquid crystal display die set and electric terminal | |
| CN110049596B (en) | Pulse input detection circuit for white light LED dimming | |
| US9728958B2 (en) | Current electronic distributing device | |
| CN104952398B (en) | A kind of LED backlight drive circuit and LCD display | |
| CN108471656A (en) | A kind of light source driving circuit and lighting device | |
| US20140266997A1 (en) | Driving Circuit of Backlight Module, Method for Driving Backlight Module, and LCD Apparatus Incorporated With Such Backlight Module | |
| CN204114680U (en) | A kind of LED eon light bar | |
| CN103247269A (en) | LED backlight and liquid crystal display device | |
| CN206164931U (en) | LED no stroboscopic circuit drive module that throws light on | |
| US10178728B2 (en) | Direct current negative dimming circuit and liquid crystal display device | |
| CN104703342A (en) | Human body heat-released electric induction lamp circuit | |
| CN206077742U (en) | A kind of LED drive circuit of booster type | |
| CN210274605U (en) | Dimming control system | |
| CN105472823A (en) | Driving circuit for lighting device and lighting device | |
| US9806514B2 (en) | Connector leakage protection system and circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |