CN106228928A - For producing circuit structure and the display device of multiple same voltage - Google Patents
For producing circuit structure and the display device of multiple same voltage Download PDFInfo
- Publication number
- CN106228928A CN106228928A CN201610777246.9A CN201610777246A CN106228928A CN 106228928 A CN106228928 A CN 106228928A CN 201610777246 A CN201610777246 A CN 201610777246A CN 106228928 A CN106228928 A CN 106228928A
- Authority
- CN
- China
- Prior art keywords
- voltage
- feedback
- circuit
- topological circuit
- module
- 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
-
- 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
Abstract
The invention discloses a kind of circuit structure for producing multiple same voltage, including the topological circuit that the multichannel that can produce same voltage is identical, each road topological circuit includes voltage transformation module, driving chip and feedback module, described driving chip controls voltage transformation module and converts input voltage into output voltage, feedback module produces a feedback voltage according to output voltage and is supplied to driving chip, to control to increase or reduce output voltage；Arranging one of them of described multichannel topological circuit as main topological circuit, remaining is from topological circuit；Connect between each feedback module and driving chip from topological circuit and have a feedback voltage adjusting module, main topological circuit and the corresponding output voltage from topological circuit are done difference and obtain difference voltage by feedback voltage adjusting module, size according to difference voltage adjusts the feedback voltage from topological circuit being input to correspondence, so that described difference voltage goes to zero.Invention additionally discloses the display device comprising as above circuit structure.
Description
Technical field
The present invention relates to the driving power technique fields of display device, a kind of for producing multiple same voltage
Circuit structure and corresponding display device.
Background technology
At present, display floater is increasing, and resolution is more and more higher, it is therefore desirable to each road voltage provides bigger electric current to drive
Kinetic force.Existing large scale, high-resolution display floater need each voltage to have bigger driving force, it is more likely that a road
Topological circuit can not be supported, needs multichannel topological circuit to provide same voltage.But the driving due to each topological circuit
Error between IC and other errors, it is easy to cause same voltage to have bigger error, wherein a road topological circuit
The voltage produced is higher limit in range of error, and the voltage that another road topological circuit produces is lower limit in range of error
Value, now the difference comparsion of the voltage that two-way topological circuit produces is big, causes display floater is driven instability, affects display product
Matter.
Summary of the invention
The deficiency existed in view of prior art, the invention provides a kind of circuit knot for producing multiple same voltage
Structure, this circuit structure can reduce the error amount produced by multichannel topological circuit between same voltage, improves display floater
The precision of driving voltage.
In order to achieve the above object, present invention employs following technical scheme:
A kind of circuit structure for producing multiple same voltage, including identical the opening up of the multichannel that can produce same voltage
Flutterring circuit, wherein, topological circuit described in each road includes voltage transformation module, driving chip and feedback module, described driving
Voltage transformation module described in chip controls converts input voltage into output voltage, and described feedback module is according to described output voltage
Produce a feedback voltage consistent with the variation tendency of described output voltage, described driving chip is provided with a reference voltage also
Receive described feedback voltage, according to the magnitude relationship of described reference voltage Yu described feedback voltage, control to increase or described in reduction
Output voltage；Wherein, arranging one of them of described multichannel topological circuit as main topological circuit, remaining is from topological circuit；
A feedback voltage adjusting module, described feedback electricity is had from connection between the feedback module and driving chip of topological circuit described in each
Described main topological circuit and the corresponding output voltage from topological circuit are done difference and obtain difference voltage, according to institute by pressure adjusting module
The size stating difference voltage adjusts the feedback voltage from topological circuit being input to correspondence, so that described difference voltage goes to zero.
Wherein, when described feedback voltage is less than described reference voltage, described driving chip controls to increase described output electricity
Pressure；When described feedback voltage is more than described reference voltage, described driving chip controls less described output voltage；When described difference
Threshold voltage is less than zero, and described feedback voltage adjusting module adjusts and increases the feedback voltage from topological circuit being input to correspondence；When
Described difference voltage is more than zero, and described feedback voltage adjusting module adjusts and reduces the feedback electricity from topological circuit being input to correspondence
Pressure.
Wherein, the value that feedback voltage is increased or reduces by described feedback voltage adjusting module is the absolute of described difference voltage
Value.
Wherein, described feedback voltage adjusting module includes the first subtractor and the second subtractor being sequentially connected with, described
The normal phase input end of one subtractor receives the output voltage of described main topological circuit, and inverting input receives the electric from topology of correspondence
The output voltage on road, outfan is connected to the inverting input of described second subtractor, the positive input of described second subtractor
End receives the feedback voltage that described feedback module produces, and outfan is connected to the driving chip from topological circuit of correspondence.
Wherein, described feedback voltage adjusting module includes the first subtractor and the first adder being sequentially connected with, described
The inverting input of one subtractor receives the output voltage of described main topological circuit, and normal phase input end receives the electric from topology of correspondence
The output voltage on road, outfan is connected to the inverting input of described first adder, the positive input of described first adder
End receives the feedback voltage that described feedback module produces, and outfan is connected to the driving chip from topological circuit of correspondence.
Wherein, described topological circuit is boost topology circuit.
Wherein, described voltage transformation module includes inducer, MOS transistor, crystal diode and capacitor, described inductance
One end of device receives input voltage, and the other end is connected to the anode of described crystal diode, and the negative terminal of described crystal diode is defeated
Go out described output voltage；The drain electrode of described MOS transistor is connected to the anode of described crystal diode, and source electrode passes through the first resistance
Electrical ground, grid receives the control signal that described driving chip provides；One end of described capacitor is connected to described crystal two
The negative terminal of pole pipe, other end electrical ground.
Wherein, described feedback module includes the second resistance and the 3rd resistance being serially connected, another of described second resistance
End is connected to the negative terminal of described crystal diode, and the other end electrical ground of described 3rd resistance, described feedback voltage is from described
Junction point output between second resistance and the 3rd resistance.
Wherein, described control signal is pulse width modulating signal, by adjusting accounting for of described pulse width modulating signal
The size of empty ratio, controls the size of described output voltage.
Present invention also offers a kind of display device, including display floater and driving module, described driving module is to described
Display floater provides and drives signal, so that described display floater display image, wherein, includes as above institute in described driving module
The circuit structure for producing multiple same voltage stated, for providing multiple same voltages to described display floater.
Beneficial effect: the circuit structure for producing multiple same voltage that the embodiment of the present invention provides, this circuit structure
Can reduce the error amount between same voltage produced by multichannel topological circuit, it is mainly used in the driving electricity of display floater
Lu Zhong, the multiple same voltage gone to zero for display floater offer error, improves the precision of the driving voltage of display floater, carries
The display quality of high panel.
Accompanying drawing explanation
Fig. 1 is the structural representation of the circuit structure for producing multiple same voltage in the embodiment of the present invention；
Fig. 2 is the circuit diagram of the circuit structure for producing multiple same voltage in the embodiment of the present invention；
Fig. 3 is the circuit diagram of the feedback voltage adjusting module in the other preferred embodiment of the present invention；
Fig. 4 is the structural representation of the display device in the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, the concrete reality to the present invention below in conjunction with the accompanying drawings
The mode of executing is described in detail.The example of these preferred implementations is illustrated in the accompanying drawings.Shown in accompanying drawing and according to
The embodiments of the present invention that accompanying drawing describes are merely exemplary, and the present invention is not limited to these embodiments.
Here, also, it should be noted in order to avoid having obscured the present invention because of unnecessary details, the most only
Show and according to the closely-related structure of the solution of the present invention and/or process step, and eliminate little with relation of the present invention
Other details.
The embodiment of the present invention provide firstly a kind of circuit structure for producing multiple same voltage, refering to Fig. 1 and Tu
2, it includes producing topological circuit 1a, 1b that the multichannel of same voltage is identical, and topological circuit 1a, 1b described in each road includes
Voltage transformation module 11, driving chip 12 and feedback module 13, described driving chip 12 controls described voltage transformation module 11
By input voltage VinBe converted to output voltage VO1、VO2, described feedback module 13 is according to described output voltage VO1、VO2Produce one
With described output voltage VO1、VO2The consistent feedback voltage V of variation tendencyFB1、VFB2, described driving chip 12 is provided with one
Reference voltage VFAnd receive described feedback voltage VFB1、VFB2, according to described reference voltage VFWith described feedback voltage VFB1、VFB2's
Magnitude relationship, controls increase or reduce described output voltage VO1、VO2.Specifically, when described feedback voltage VFB1、VFB2Less than institute
State reference voltage VFTime, described driving chip 12 controls to increase described output voltage VO1、VO2；When described feedback voltage VFB1、VFB2
More than described reference voltage VFTime, described driving chip 12 controls less described output voltage VO1、VO2。
In the present embodiment, as it is shown in figure 1, arrange described multichannel topological circuit 1a, 1b one of them as main topology electricity
Road 1a, remaining is from topological circuit 1b, each described from connection between the feedback module 13 and driving chip 12 of topological circuit 1b
There is a feedback voltage adjusting module 14, for the feedback voltage produced by the corresponding feedback module 13 from topological circuit 1b
VFB2It is adjusted to new feedback voltage VFB2The driving chip 12 of correspondence it is input to after '.It should be noted that electricity as shown in Figure 1
Line structure, is carried out having as a example by two-way can produce topological circuit 1a, 1b that the multichannel of same voltage is identical in the present embodiment
Illustrate wherein there is a road main topological circuit 1a and a road from topological circuit 1b.In some other embodiments, it is also possible to bag
Containing more from topological circuit, the feedback voltage adjusting module more connected from topological circuit and the present embodiment are introduced anti-
The structure of feedthrough voltage adjusting module is identical with operation principle.
Wherein, described feedback voltage adjusting module 14 detects the output voltage V of described main topological circuit 1a respectivelyO1With from opening up
Flutter the output voltage output voltage V of circuit 1bO2, by described main topological circuit 1a and the corresponding output voltage from topological circuit 1b
VO1、VO2Do difference and obtain difference voltage △ V, adjust according to the size of described difference voltage △ V be input to correspondence from topological circuit
The feedback voltage V of 1bFB2', so that described difference voltage △ V goes to zero.When described difference voltage △ V is less than zero, described feedback electricity
Pressure adjusting module 14 adjusts and increases the feedback voltage V from topological circuit 1b being input to correspondenceFB2’；As described difference voltage △ V
More than zero, described feedback voltage adjusting module 14 adjusts and reduces the feedback voltage V from topological circuit 1b being input to correspondenceFB2’。
Wherein, described feedback voltage adjusting module 14 is to the feedback voltage V from topological circuit 1bFB2The value increased or reduce
Absolute value for described difference voltage △ V.Specifically, can represent according to formula below: if described feedback voltage adjusts mould
Block 14 adjusts feedback voltage VFB2It is increased to new feedback voltage VFB2', then VFB2'=VFB2+|△V|；If described feedback voltage
Adjusting module 14 adjusts feedback voltage VFB2It is reduced to new feedback voltage VFB2', then VFB2'=VFB2-|△V|；Wherein, △ V
=VO1-VO2。
In the present embodiment, as in figure 2 it is shown, described topological circuit 1a, 1b are that (specially BOOST's boost topology circuit boosts
Circuit).Specifically, described voltage transformation module 11 includes inducer L, MOS transistor Q, crystal diode D and capacitor C, institute
The one end stating inducer L receives input voltage Vin, the other end is connected to the anode of described crystal diode D, described crystal two pole
The negative terminal of pipe D exports described output voltage VO1、VO2；The drain electrode of described MOS transistor Q is just being connected to described crystal diode D
End, source electrode passes through the first resistance R1Electrical ground, grid receives the control signal that described driving chip 12 provides；Described capacitor
One end of C is connected to the negative terminal of described crystal diode D, other end electrical ground.Described feedback module 13 includes being serially connected
The second resistance R2With the 3rd resistance R3, described second resistance R1The other end be connected to the negative terminal of described crystal diode D, institute
State the 3rd resistance R3Other end electrical ground, described feedback voltage VFB1、VFB2From described second resistance R2With the 3rd resistance R3It
Between junction point output.Wherein, the control signal that described driving chip 12 provides is pulse width modulating signal (Pulse
Width Modulation, PWM), by adjusting the size of the dutycycle (duty) of described pulse width modulating signal, control institute
State output voltage VO1、VO2Size.
In the present embodiment, as in figure 2 it is shown, described feedback voltage adjusting module 14 includes the first subtractor being sequentially connected with
A1With the second subtractor A2, described first subtractor A1Normal phase input end receive described main topological circuit 1a output voltage VO1,
Inverting input receives the corresponding output voltage V from topological circuit 1bO2, outfan obtains difference voltage △ V and is connected to described
Second subtractor A2Inverting input, described second subtractor A2Normal phase input end receive described feedback module 13 produce
Feedback voltage VFB2, outfan obtains the feedback voltage V after adjustingFB2' it is connected to the corresponding driving chip from topological circuit 1b
12。
The specific works process of circuit structure as above is as follows:
Work as VO1>VO2, △ V=VO1-VO2> 0, by the second subtractor A2Action, VFB2'=VFB2-△ V=VFB2-|△V
|, i.e. VFB2' be adjusted to less than VFB2, correspondingly can be less than reference voltage VF, now, adjust from the driving chip 12 of topological circuit 1b
The dutycycle of whole pwm signal, controls to increase output voltage VO2, until it reaches VO2=VO1Poised state.
Work as VO1<VO2, △ V=VO1-VO2< 0, by the second subtractor A2Action, VFB2'=VFB2-△ V=VFB2+|△V
|, i.e. VFB2' be adjusted to more than VFB2, correspondingly can be more than reference voltage VF, now, adjust from the driving chip 12 of topological circuit 1b
The dutycycle of whole pwm signal, controls to reduce output voltage VO2, until it reaches VO2=VO1Poised state.
Work as VO1=VO2, △ V=VO1-VO2=0, VFB2'=VFB2, the parameter value of circuit keeps constant.
Example performed as described above provides the circuit structure for producing multiple same voltage, by increasing instead from topological circuit
Feedthrough voltage adjusting module, according to main topological circuit and the output voltage difference from topological circuit, adjust be input to correspondence from opening up
Flutter the feedback voltage of circuit to reach to adjust the output voltage from topological circuit, finally make described difference voltage go to zero.By
This, this circuit can reduce the error amount produced by multichannel topological circuit between same voltage, and it is mainly used in display surface
In the drive circuit of plate, the multiple same voltage gone to zero for display floater offer error, improves the driving electricity of display floater
The precision of pressure, improves the display quality of panel.
In a further embodiment, described feedback voltage adjusting module 14 it is also possible that circuit:
As it is shown on figure 3, described feedback voltage adjusting module 14 includes the 3rd subtractor A being sequentially connected with3With the first addition
Device A4, described 3rd subtractor A3Inverting input receive described main topological circuit 1a output voltage VO1, normal phase input end
Receive the corresponding output voltage V from topological circuit 1bO2, outfan is connected to described first adder A4Inverting input,
Described first adder A4Normal phase input end receive receive described feedback module 13 produce feedback voltage VFB2, outfan obtains
Feedback voltage V after must adjustingFB2' it is connected to the corresponding driving chip 12 from topological circuit 1b
The present embodiment additionally provides a kind of display device, and as shown in Figure 4, this display device includes display floater 200 and drives
Dynamic model block 100, described driving module 100 provides to described display floater 200 and drives signal, so that described display floater 200 shows
Diagram picture, wherein, described driving module 200 includes the embodiment of the present invention provided for producing multiple same voltage
Circuit structure, for providing multiple same voltage to described display floater 200.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
The above is only the detailed description of the invention of the application, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the application principle, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
1. for producing a circuit structure for multiple same voltage, including the topology that the multichannel that can produce same voltage is identical
Circuit, it is characterised in that topological circuit described in each road includes voltage transformation module, driving chip and feedback module, described
Driving chip controls described voltage transformation module and converts input voltage into output voltage, and described feedback module is according to described output
Voltage produces a feedback voltage consistent with the variation tendency of described output voltage, is provided with a benchmark electricity in described driving chip
Press and receive described feedback voltage, according to the magnitude relationship of described reference voltage Yu described feedback voltage, controlling to increase or reduce
Described output voltage；
Wherein, arranging one of them of described multichannel topological circuit as main topological circuit, remaining is from topological circuit；Each institute
Stating to connect between the feedback module from topological circuit and driving chip and have a feedback voltage adjusting module, described feedback voltage adjusts
Described main topological circuit and the corresponding output voltage from topological circuit are done difference and obtain difference voltage, according to described difference by module
The size of voltage adjusts the feedback voltage from topological circuit being input to correspondence, so that described difference voltage goes to zero.
Circuit structure for producing multiple same voltage the most according to claim 1, it is characterised in that when described feedback
When voltage is less than described reference voltage, described driving chip controls to increase described output voltage；When described feedback voltage is more than institute
When stating reference voltage, described driving chip controls less described output voltage；
When described difference voltage is less than zero, described feedback voltage adjusting module adjust increase be input to correspondence from topological circuit
Feedback voltage；When described difference voltage is more than zero, described feedback voltage adjusting module adjust reduce be input to correspondence from topology
The feedback voltage of circuit.
Circuit structure for producing multiple same voltage the most according to claim 2, it is characterised in that described feedback electricity
The absolute value that value is described difference voltage that feedback voltage is increased or reduces by pressure adjusting module.
Circuit structure for producing multiple same voltage the most according to claim 3, it is characterised in that described feedback electricity
Pressure adjusting module includes the first subtractor and the second subtractor being sequentially connected with, and the normal phase input end of described first subtractor receives
The output voltage of described main topological circuit, inverting input receives the corresponding output voltage from topological circuit, and outfan connects
To the inverting input of described second subtractor, the normal phase input end of described second subtractor receives what described feedback module produced
Feedback voltage, outfan is connected to the driving chip from topological circuit of correspondence.
Circuit structure for producing multiple same voltage the most according to claim 3, it is characterised in that described feedback electricity
Pressure adjusting module includes the first subtractor and the first adder being sequentially connected with, and the inverting input of described first subtractor receives
The output voltage of described main topological circuit, normal phase input end receives the corresponding output voltage from topological circuit, and outfan connects
To the inverting input of described first adder, the normal phase input end of described first adder receives what described feedback module produced
Feedback voltage, outfan is connected to the driving chip from topological circuit of correspondence.
6. according to the arbitrary described circuit structure for producing multiple same voltage of claim 1-5, it is characterised in that described
Topological circuit is boost topology circuit.
Circuit structure for producing multiple same voltage the most according to claim 6, it is characterised in that described voltage turns
Die change block includes inducer, MOS transistor, crystal diode and capacitor,
Wherein, one end of described inducer receives input voltage, and the other end is connected to the anode of described crystal diode, described crystalline substance
The negative terminal of body diode exports described output voltage；The drain electrode of described MOS transistor is connected to the anode of described crystal diode,
Source electrode passes through the first resistance electrical ground, and grid receives the control signal that described driving chip provides；One end of described capacitor
It is connected to the negative terminal of described crystal diode, other end electrical ground.
Circuit structure for producing multiple same voltage the most according to claim 7, it is characterised in that described feedback mould
Block includes the second resistance and the 3rd resistance being serially connected, and the other end of described second resistance is connected to described crystal diode
Negative terminal, the other end electrical ground of described 3rd resistance, described feedback voltage is between described second resistance and the 3rd resistance
Junction point exports.
Circuit structure for producing multiple same voltage the most according to claim 7, it is characterised in that described control is believed
Number it is pulse width modulating signal, by adjusting the size of the dutycycle of described pulse width modulating signal, controls described output
The size of voltage.
10. a display device, including display floater and driving module, described driving module provides to described display floater and drives
Signal, so that described display floater display image, it is characterised in that described driving module comprises and appoints just like claim 1-9
The circuit structure for producing multiple same voltage described in one, for providing multiple same voltages to described display floater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610777246.9A CN106228928B (en) | 2016-08-30 | 2016-08-30 | For generating the circuit structure and display device of multiple same voltages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610777246.9A CN106228928B (en) | 2016-08-30 | 2016-08-30 | For generating the circuit structure and display device of multiple same voltages |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106228928A true CN106228928A (en) | 2016-12-14 |
| CN106228928B CN106228928B (en) | 2019-05-21 |
Family
ID=58071614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610777246.9A Active CN106228928B (en) | 2016-08-30 | 2016-08-30 | For generating the circuit structure and display device of multiple same voltages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106228928B (en) |
Citations (6)
| 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 |
-
2016
- 2016-08-30 CN CN201610777246.9A patent/CN106228928B/en active Active
Patent Citations (6)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106228928B (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102983744B (en) | DC/DC module for LCD driving circuit | |
| CN105183067B (en) | The high pressure LDO of charge pumps | |
| CN103065594A (en) | Data driving circuit, liquid crystal display device and driving method | |
| CN105978337A (en) | COT control mode based offset voltage canceling circuit | |
| CN203896193U (en) | Wide voltage input power supply module | |
| CN111462708B (en) | Voltage conversion circuit, voltage conversion method and display device | |
| CN106329924A (en) | System for improving load transient response performance | |
| CN106787626A (en) | Slope compensation circuit and power conversion unit | |
| CN105656307A (en) | Charge pump circuit and grid turn-on voltage generating circuit | |
| CN107623440A (en) | Voltage conversion circuit and power supply switch circuit | |
| CN103219893A (en) | Switch power supply controller and switch power supply circuit | |
| CN203522529U (en) | Positive and negative voltage power supply circuit, and electronic device requiring positive and negative voltage power supply | |
| CN113241937B (en) | Ripple adjustable chip and power supply chip system | |
| CN102497102B (en) | Synchronous buck-boost DC-DC conversion circuit with wide output range | |
| CN102946190A (en) | Positive and negative voltage generating circuit | |
| CN205160851U (en) | Two unification powers | |
| CN103378726B (en) | Switched power supply and control circuit thereof and control method | |
| CN104253544A (en) | Compensating circuit of control chip of switch power source | |
| CN106228928A (en) | For producing circuit structure and the display device of multiple same voltage | |
| CN116582005A (en) | Electric energy conversion circuit, electric energy conversion method and electric energy conversion equipment | |
| CN106849687B (en) | Double flyback sourses of passive power factor correction are realized in two-way LC oscillation | |
| CN206211568U (en) | A kind of outside adjustable line compensation circuit | |
| CN1193483C (en) | Method and device for generating driving power supply | |
| WO2022166467A1 (en) | Gate turn-on voltage generation circuit, display panel drive apparatus and display apparatus | |
| CN202889190U (en) | Positive-negative voltage generating circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |