CN106228928B - For generating the circuit structure and display device of multiple same voltages - Google Patents

For generating the circuit structure and display device of multiple same voltages Download PDF

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Publication number
CN106228928B
CN106228928B CN201610777246.9A CN201610777246A CN106228928B CN 106228928 B CN106228928 B CN 106228928B CN 201610777246 A CN201610777246 A CN 201610777246A CN 106228928 B CN106228928 B CN 106228928B
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voltage
feedback
circuit
module
topological circuit
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CN106228928A (en
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张先明
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • 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
    • 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a kind of for generating the circuit structure of multiple same voltages, the identical topological circuit of multichannel including same voltage can be generated, it include voltage transformation module, driving chip and feedback module per topological circuit all the way, the driving chip control voltage transformation module converts input voltage into output voltage, feedback module generates a feedback voltage according to output voltage and is supplied to driving chip, increases or reduces output voltage with control；One of described multichannel topological circuit is set and is used as main topological circuit, remaining is from topological circuit；Feedback voltage adjustment module is connected between each feedback module and driving chip from topological circuit, feedback voltage adjusts module and main topological circuit and corresponding make the difference from the output voltage of topological circuit is obtained difference voltage, it is input to the corresponding feedback voltage from topological circuit according to the adjustment of the size of difference voltage, so that the difference voltage goes to zero.Invention additionally discloses the display devices comprising circuit structure as above.

Description

For generating the circuit structure and display device of multiple same voltages
Technical field
It is especially a kind of for generating multiple same voltages the present invention relates to the driving power technical field of display device Circuit structure and corresponding display device.
Background technique
Currently, display panel is increasing, resolution ratio is higher and higher, it is therefore desirable to which each road voltage provides bigger electric current and drives Kinetic force.Existing large scale, high-resolution display panel need each voltage to have bigger driving capability, it is more likely that all the way Topological circuit cannot be supported, need multichannel topological circuit to provide same voltage.But due to the driving of each topological circuit Error and other errors between IC, it is easy to cause same voltage to have biggish error, such as wherein topological circuit all the way The voltage of generation is upper limit value in error range, and the voltage that another way topological circuit generates is lower limit in error range Value, at this time two-way topological circuit generate voltage difference comparsion it is big, cause to display panel drive it is unstable, influence display product Matter.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of for generating the circuit knot of multiple same voltages Structure, the circuit structure can reduce the error amount between same voltage caused by multichannel topological circuit, improve display panel The precision of driving voltage.
In order to achieve the above object, present invention employs following technical solutions:
It is a kind of for generating the circuit structure of multiple same voltages, the multichannel including that can generate same voltage is identical to open up Flutter circuit, wherein every topological circuit described all the way includes voltage transformation module, driving chip and feedback module, the driving Voltage transformation module described in chip controls converts input voltage into output voltage, and the feedback module is according to the output voltage The consistent feedback voltage of variation tendency of one with the output voltage are generated, is provided with a reference voltage simultaneously in the driving chip The feedback voltage is received, according to the size relation of the reference voltage and the feedback voltage, control increases or reduces described Output voltage；Wherein, one of described multichannel topological circuit is set and is used as main topological circuit, remaining is from topological circuit； Each described from feedback voltage adjustment module is connected between the feedback module and driving chip of topological circuit, the feedback is electric The main topological circuit and corresponding make the difference from the output voltage of topological circuit are obtained difference voltage by pressure adjustment module, according to institute The feedback voltage adjustment that the size and the feedback module for stating difference voltage generate is input to corresponding from the anti-of topological circuit Feedthrough voltage, so that the difference voltage goes to zero.
Wherein, when the feedback voltage is less than the reference voltage, the driving chip control increases the output electricity Pressure；When the feedback voltage is greater than the reference voltage, the driving chip control reduces the output voltage；When the difference For threshold voltage less than zero, the feedback voltage adjustment module adjustment, which increases, is input to the corresponding feedback voltage from topological circuit；When The difference voltage is greater than zero, and the feedback voltage adjustment module adjustment, which reduces, is input to the corresponding feedback electricity from topological circuit Pressure.
Wherein, the feedback voltage adjustment module is the absolute of the difference voltage to the value that feedback voltage increases or reduces Value.
Wherein, feedback voltage adjustment module includes sequentially connected first subtracter and the second subtracter, and described the The normal phase input end of one subtracter receives the output voltage of the main topological circuit, and inverting input terminal receives corresponding from topological electricity The output voltage on road, output end are connected to the inverting input terminal of second subtracter, the positive input of second subtracter End receives the feedback voltage that the feedback module generates, and output end is connected to the corresponding driving chip from topological circuit.
Wherein, feedback voltage adjustment module includes sequentially connected first subtracter and first adder, and described the The inverting input terminal of one subtracter receives the output voltage of the main topological circuit, and normal phase input end receives corresponding from topological electricity The output voltage on road, output end are connected to the inverting input terminal of the first adder, the positive input of the first adder End receives the feedback voltage that the feedback module generates, and output end is connected to the corresponding driving chip from topological circuit.
Wherein, the topological circuit is boost topology circuit.
Wherein, the voltage transformation module includes inductor, MOS transistor, crystal diode and capacitor, the inductance One end of device receives input voltage, and the other end is connected to the anode of the crystal diode, and the negative terminal of the crystal diode is defeated The output voltage out；The drain electrode of the MOS transistor is connected to the anode of the crystal diode, and source electrode passes through first resistor Electrical ground, grid receive the control signal that the driving chip provides；One end of the capacitor is connected to the crystal two The negative terminal of pole pipe, other end electrical ground.
Wherein, the feedback module includes the second resistance and 3rd resistor being serially connected, the second resistance it is another End is connected to the negative terminal of the crystal diode, the other end electrical ground of the 3rd resistor, and the feedback voltage is from described Tie point output between second resistance and 3rd resistor.
Wherein, the control signal is pulse width modulating signal, by adjusting accounting for for the pulse width modulating signal The size of empty ratio, controls the size of the output voltage.
The present invention also provides a kind of display device, including display panel and drive module, the drive module is to described Display panel provides driving signal, so that the display panel shows image, wherein include institute as above in the drive module That states is used to generate the circuit structure of multiple same voltages, for providing multiple same voltages to the display panel.
The utility model has the advantages that provided in an embodiment of the present invention for generating the circuit structure of multiple same voltages, the circuit structure It can reduce the error amount between same voltage caused by multichannel topological circuit, which are mainly applied to the driving of display panel electricity Lu Zhong provides multiple same voltages that error goes to zero for display panel, improves the precision of the driving voltage of display panel, mention The display quality of high panel.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the circuit structure for generating multiple same voltages in the embodiment of the present invention；
Fig. 2 is the circuit diagram of the circuit structure for generating multiple same voltages in the embodiment of the present invention；
Fig. 3 is the circuit diagram of the feedback voltage adjustment module in addition preferred embodiment of the invention；
Fig. 4 is the structural schematic diagram of the display device in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, with reference to the accompanying drawing to specific reality of the invention The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in attached drawing and according to The embodiments of the present invention of attached drawing description are only exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only Show with closely related structure and/or processing step according to the solution of the present invention, and be omitted little with relationship of the present invention Other details.
The embodiment of the present invention provide firstly it is a kind of for generating the circuit structure of multiple same voltages, refering to fig. 1 and figure 2 comprising multichannel identical topological circuit 1a, 1b of same voltage can be generated, include per described all the way topological circuit 1a, 1b Voltage transformation module 11, driving chip 12 and feedback module 13, the driving chip 12 control the voltage transformation module 11 By input voltage VinBe converted to output voltage VO1、VO2, the feedback module 13 is according to the output voltage VO1、VO2Generate one With the output voltage VO1、VO2The consistent feedback voltage V of variation tendencyFB1、VFB2, one is provided in the driving chip 12 Reference voltage VFAnd receive the feedback voltage VFB1、VFB2, according to the reference voltage VFWith the feedback voltage VFB1、VFB2's Size relation, control increase or reduce the output voltage VO1、VO2.Specifically, when the feedback voltage VFB1、VFB2Less than institute State reference voltage VFWhen, the control of driving chip 12 increases the output voltage VO1、VO2；When the feedback voltage VFB1、VFB2 Greater than the reference voltage VFWhen, the driving chip 12 controls the smaller output voltage VO1、VO2。
In the present embodiment, as shown in Figure 1, one of described multichannel topological circuit 1a, 1b is arranged as main topology electricity Road 1a, remaining be from topological circuit 1b, it is each described to be connected between the feedback module 13 and driving chip 12 of topological circuit 1b There is feedback voltage adjustment module 14, for by the corresponding feedback voltage generated from the feedback module 13 of topological circuit 1b VFB2It is adjusted to new feedback voltage VFB2' after be input to corresponding driving chip 12.It should be noted that electricity as shown in Figure 1 Line structure is carried out by taking the multichannel that can generate same voltage with two-way identical topological circuit 1a, 1b as an example in the present embodiment Illustrate, wherein having main topological circuit 1a all the way and all the way from topological circuit 1b.In other some embodiments, also it can wrap It is introduced containing the feedback voltage adjustment module more from topological circuit, more connected from topological circuit and the present embodiment anti- The structure that feedthrough voltage adjusts module is identical with working principle.
Wherein, the feedback voltage adjustment module 14 detects the output voltage V of the main topological circuit 1a respectivelyO1With from opening up Flutter the output voltage output voltage V of circuit 1bO2, by the main topological circuit 1a and the corresponding output voltage from topological circuit 1b VO1、VO2It makes the difference and obtains difference voltage △ V, be input to according to the adjustment of the size of the difference voltage △ V corresponding from topological circuit The feedback voltage V of 1bFB2', so that the difference voltage △ V goes to zero.When the difference voltage △ V is less than zero, the feedback is electric The pressure adjustment adjustment of module 14, which increases, is input to the corresponding feedback voltage V from topological circuit 1bFB2'；As the difference voltage △ V Greater than zero, the feedback voltage adjustment adjustment of module 14, which reduces, is input to the corresponding feedback voltage V from topological circuit 1bFB2’。
Wherein, the feedback voltage adjustment module 14 is to the feedback voltage V from topological circuit 1bFB2The value increased or reduced For the absolute value of the difference voltage △ V.Specifically, it can be indicated according to following formula: if the feedback voltage adjusts mould Block 14 is adjusted feedback voltage VFB2It is increased to new feedback voltage VFB2', then VFB2'=VFB2+|△V|；If the feedback voltage The adjustment of module 14 is adjusted by feedback voltage VFB2It is reduced to new feedback voltage VFB2', then VFB2'=VFB2-|△V|；Wherein, △ V =VO1-VO2。
In the present embodiment, as shown in Fig. 2, described topological circuit 1a, 1b are boost topology circuit (specially BOOST boosting Circuit).Specifically, the voltage transformation module 11 includes inductor L, MOS transistor Q, crystal diode D and capacitor C, institute The one end for stating inductor L receives input voltage Vin, the other end is connected to the anode of the crystal diode D, two pole of crystal The negative terminal of pipe D exports the output voltage VO1、VO2；The drain electrode of the MOS transistor Q is being connected to the crystal diode D just End, source electrode pass through first resistor R1Electrical ground, grid receive the control signal that the driving chip 12 provides；The capacitor One end of C is connected to the negative terminal of the crystal diode D, other end electrical ground.The feedback module 13 includes being serially connected Second resistance R2With 3rd resistor R3, the second resistance R2The other end be connected to the negative terminal of the crystal diode D, institute State 3rd resistor R3Other end electrical ground, the feedback voltage VFB1、VFB2From the second resistance R2With 3rd resistor R3It Between tie point output.Wherein, the control signal that the driving chip 12 provides is pulse width modulating signal (Pulse Width Modulation, PWM), by adjusting the size of the duty ratio (duty) of the pulse width modulating signal, control institute State output voltage VO1、VO2Size.
In the present embodiment, as shown in Fig. 2, feedback voltage adjustment module 14 includes sequentially connected first subtracter A1With the second subtracter A2, the first subtracter A1Normal phase input end receive the output voltage V of the main topological circuit 1aO1, Inverting input terminal receives the corresponding output voltage V from topological circuit 1bO2, output end acquisition difference voltage △ V is connected to described Second subtracter A2Inverting input terminal, the second subtracter A2Normal phase input end receive what the feedback module 13 generated Feedback voltage VFB2, output end acquisition feedback voltage V adjustedFB2' it is connected to the corresponding driving chip from topological circuit 1b 12。
The specific work process of circuit structure as above is as follows:
Work as VO1>VO2, △ V=VO1-VO2> 0, pass through the second subtracter A2Movement, VFB2'=VFB2- △ V=VFB2-|△V |, i.e. VFB2' be adjusted to be less than VFB2, can correspondingly be less than reference voltage VF, at this point, being adjusted from the driving chip 12 of topological circuit 1b The duty ratio of whole pwm signal, control increase output voltage VO2, until reaching VO2=VO1Equilibrium state.
Work as VO1<VO2, △ V=VO1-VO2< 0, pass through the second subtracter A2Movement, VFB2'=VFB2- △ V=VFB2+|△V |, i.e. VFB2' be adjusted to be greater than VFB2, can correspondingly be greater than reference voltage VF, at this point, being adjusted from the driving chip 12 of topological circuit 1b The duty ratio of whole pwm signal, control reduce output voltage VO2, until reaching VO2=VO1Equilibrium state.
Work as VO1=VO2, △ V=VO1-VO2=0, VFB2'=VFB2, the parameter value of circuit remains unchanged.
Embodiment as above provides the circuit structure for generating multiple same voltages, by increasing instead from topological circuit Feedthrough voltage adjusts module, and according to main topological circuit and from the output voltage difference of topological circuit, adjustment is input to corresponding from opening up The feedback voltage of circuit is flutterred to reach output voltage of the adjustment from topological circuit, the difference voltage is finally made to go to zero.By This, which can reduce the error amount between same voltage caused by multichannel topological circuit, and which are mainly applied to display surfaces In the driving circuit of plate, multiple same voltages that error goes to zero are provided for display panel, improve the driving electricity of display panel The precision of pressure improves the display quality of panel.
In a further embodiment, feedback voltage adjustment module 14 it is also possible that circuit:
As shown in figure 3, the feedback voltage adjustment module 14 includes sequentially connected third subtracter A3With the first addition Device A4, the third subtracter A3Inverting input terminal receive the output voltage V of the main topological circuit 1aO1, normal phase input end Receive the corresponding output voltage V from topological circuit 1bO2, output end is connected to the first adder A4Inverting input terminal, The first adder A4Normal phase input end receive the feedback voltage V that the feedback module 13 generatesFB2, output end obtains Obtain feedback voltage V adjustedFB2' it is connected to the corresponding driving chip 12 from topological circuit 1b.
The present embodiment additionally provides a kind of display device, as shown in figure 4, the display device includes display panel 200 and drives Dynamic model block 100, the drive module 100 provide driving signal to the display panel 200, so that the display panel 200 is aobvious Diagram picture, wherein include provided by the embodiment of the present invention in the drive module 200 for generating multiple same voltages Circuit structure, for providing multiple same voltages to the display panel 200.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered It is considered as the protection scope of the application.

Claims (10)

1. a kind of for generating the circuit structure of multiple same voltages, the identical topology of multichannel including same voltage can be generated Circuit, which is characterized in that it per the topological circuit described all the way include voltage transformation module, driving chip and feedback module, it is described Driving chip controls the voltage transformation module and converts input voltage into output voltage, and the feedback module is according to the output Voltage generates the consistent feedback voltage of variation tendency of one with the output voltage, and benchmark electricity is provided in the driving chip The feedback voltage is pressed and receives, according to the size relation of the reference voltage and the feedback voltage, control is increased or reduced The output voltage；
Wherein, one of described multichannel topological circuit is set and is used as main topological circuit, remaining is from topological circuit；Each institute It states from feedback voltage adjustment module is connected between the feedback module and driving chip of topological circuit, the feedback voltage adjusts The main topological circuit and corresponding make the difference from the output voltage of topological circuit are obtained difference voltage by module, according to the difference The feedback voltage adjustment that the size of voltage and the feedback module generate is input to the corresponding feedback voltage from topological circuit, So that the difference voltage goes to zero.
2. according to claim 1 for generating the circuit structure of multiple same voltages, which is characterized in that when the feedback When voltage is less than the reference voltage, the driving chip control increases the output voltage；When the feedback voltage is greater than institute When stating reference voltage, the driving chip control reduces the output voltage；
When the difference voltage is less than zero, the feedback voltage adjustment module adjustment increase be input to it is corresponding from topological circuit Feedback voltage；When the difference voltage is greater than zero, the feedback voltage adjustment module adjustment reduction is input to corresponding from topology The feedback voltage of circuit.
3. according to claim 2 for generating the circuit structure of multiple same voltages, which is characterized in that the feedback electricity Pressure adjustment module is the absolute value of the difference voltage to the value that feedback voltage increases or reduces.
4. according to claim 3 for generating the circuit structure of multiple same voltages, which is characterized in that the feedback electricity Pressure adjustment module includes sequentially connected first subtracter and the second subtracter, and the normal phase input end of first subtracter receives The output voltage of the main topological circuit, inverting input terminal receive the corresponding output voltage from topological circuit, output end connection To the inverting input terminal of second subtracter, the normal phase input end of second subtracter receives what the feedback module generated Feedback voltage, output end are connected to the corresponding driving chip from topological circuit.
5. according to claim 3 for generating the circuit structure of multiple same voltages, which is characterized in that the feedback electricity Pressure adjustment module includes sequentially connected first subtracter and first adder, and the inverting input terminal of first subtracter receives The output voltage of the main topological circuit, normal phase input end receive the corresponding output voltage from topological circuit, output end connection To the inverting input terminal of the first adder, the normal phase input end of the first adder receives what the feedback module generated Feedback voltage, output end are connected to the corresponding driving chip from topological circuit.
6. -5 any circuit structure for being used to generate multiple same voltages according to claim 1, which is characterized in that described Topological circuit is boost topology circuit.
7. according to claim 6 for generating the circuit structure of multiple same voltages, which is characterized in that the voltage turns Mold changing block includes inductor, MOS transistor, crystal diode and capacitor,
Wherein, one end of the inductor receives input voltage, and the other end is connected to the anode of the crystal diode, the crystalline substance The negative terminal of body diode exports the output voltage；The drain electrode of the MOS transistor is connected to the anode of the crystal diode, For source electrode by first resistor electrical ground, grid receives the control signal that the driving chip provides；One end of the capacitor It is connected to the negative terminal of the crystal diode, other end electrical ground.
8. according to claim 7 for generating the circuit structure of multiple same voltages, which is characterized in that the feedback mould Block includes the second resistance and 3rd resistor being serially connected, and the other end of the second resistance is connected to the crystal diode Negative terminal, the other end electrical ground of the 3rd resistor, the feedback voltage is between the second resistance and 3rd resistor Tie point output.
9. according to claim 7 for generating the circuit structure of multiple same voltages, which is characterized in that the control letter Number by adjusting the size of the duty ratio of the pulse width modulating signal output is controlled for pulse width modulating signal The size of voltage.
10. a kind of display device, including display panel and drive module, the drive module provides driving to the display panel Signal, so that the display panel shows image, which is characterized in that comprising appointing just like claim 1-9 in the drive module For generating the circuit structure of multiple same voltages described in one, for providing multiple same voltages to the display panel.
CN201610777246.9A 2016-08-30 2016-08-30 For generating the circuit structure and display device of multiple same voltages Active CN106228928B (en)

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Publication number Priority date Publication date Assignee Title
JPH1169812A (en) * 1997-08-19 1999-03-09 Matsushita Electric Ind Co Ltd Power supply unit for crt
CN101079574A (en) * 2006-05-26 2007-11-28 通嘉科技股份有限公司 Voltage converter capable of avoiding voltage drop occurring in input signal and related method
CN102111071A (en) * 2009-12-28 2011-06-29 乐金显示有限公司 DC-DC converter and controlling method thereof, and display device using the same
CN202275588U (en) * 2011-09-13 2012-06-13 深圳市华星光电技术有限公司 Circuit for compensating LED backlight conduction voltage drop difference
CN102637412A (en) * 2012-04-28 2012-08-15 深圳市华星光电技术有限公司 LED (light-emitting diode) backlight drive circuit, liquid crystal display device and drive method
CN102983744A (en) * 2012-12-25 2013-03-20 深圳市华星光电技术有限公司 DC/DC module for LCD driving circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1169812A (en) * 1997-08-19 1999-03-09 Matsushita Electric Ind Co Ltd Power supply unit for crt
CN101079574A (en) * 2006-05-26 2007-11-28 通嘉科技股份有限公司 Voltage converter capable of avoiding voltage drop occurring in input signal and related method
CN102111071A (en) * 2009-12-28 2011-06-29 乐金显示有限公司 DC-DC converter and controlling method thereof, and display device using the same
CN202275588U (en) * 2011-09-13 2012-06-13 深圳市华星光电技术有限公司 Circuit for compensating LED backlight conduction voltage drop difference
CN102637412A (en) * 2012-04-28 2012-08-15 深圳市华星光电技术有限公司 LED (light-emitting diode) backlight drive circuit, liquid crystal display device and drive method
CN102983744A (en) * 2012-12-25 2013-03-20 深圳市华星光电技术有限公司 DC/DC module for LCD driving circuit

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