CN106409256A - Gamma voltage generation circuit and liquid crystal display device - Google Patents
Gamma voltage generation circuit and liquid crystal display device Download PDFInfo
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- CN106409256A CN106409256A CN201610957422.7A CN201610957422A CN106409256A CN 106409256 A CN106409256 A CN 106409256A CN 201610957422 A CN201610957422 A CN 201610957422A CN 106409256 A CN106409256 A CN 106409256A
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- generation circuit
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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
- 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
- G09G3/36—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 using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a gamma voltage generation circuit. The gamma voltage generation circuit includes a first voltage dividing resistor, a first switching element, a second switching element and a resistor string; the first switching element comprises a first closed-circuit end, a first control end and a second closed-circuit end, wherein the first closed-circuit end receives reference high voltage through the first voltage dividing resistor, the first control end receives view angle switching control signals, and the second closed-circuit end is grounded; the second switching element comprises a third closed-circuit end, a second control end and a fourth closed-circuit end, wherein the third closed-circuit end receives direct-current voltage, and the second control end is connected with the first closed-circuit end of the first switching element; and the resistor string comprises a plurality of second voltage dividing resistors; the first end of the resistor string is connected with the fourth closed-circuit end of the second switching element; the second end of the resistor string is grounded; and the common end of every two second voltage dividing resistors is connected with a source driving circuit. The present invention also provides a liquid crystal display device. The gamma voltage generation circuit and the liquid crystal display device of the present invention have the advantages of high flexibility and simple design.
Description
Technical field
The present invention relates to display technology field, particularly to a kind of gamma voltage generation circuit and liquid crystal indicator.
Background technology
Liquid crystal indicator (Liquid Crystal Display, LCD) has that image quality is good, small volume, lightweight, low drive
The advantages of dynamic voltage, low-power consumption, radiationless Manufacturing cost are relatively low, occupies an leading position in flat display field at present.Its
Be widely used in desktop computer, palmtop computer, personal digital assistant (Personal Digital Assistant,
PDA), in multiple office automation such as portable phone, TV box and audio-visual equipment.
Display device includes display floater, display floater driving plate, the backlight mould comprising at least one light emitting diode string
Group and light emitting diode (light emitting diode, LED) driving plate.Wherein, display floater driving plate is provided with
Gamma (gamma) voltage generation circuit, to provide multiple gamma electric voltages to source electrode drive circuit, so that source electrode drive circuit is defeated
Go out multiple data-signals to pixel cell corresponding in display floater.
At present, the demand more and more higher to liquid crystal indicator image quality, liquid crystal indicator is frequently necessary in difference
Display pattern under operate, such as wide viewing angle, narrow viewing angle isotype, need the gammas electricity of different groups under different display patterns
Pressure.But existing gamma voltage generation circuit can only produce one group of gamma electric voltage, and using one group under different display modes
Gamma electric voltage can lead to show deviation, the picture that therefore above-mentioned gamma voltage generation circuit cannot meet different display modes shows
Demand.
Therefore, it is necessary to provide improved technical scheme to overcome above technical problem present in prior art.
Content of the invention
The main technical problem to be solved in the present invention is to provide a kind of gamma voltage generation circuit, and it is provided that multigroup gamma
Voltage and flexibility is good, design is simple.
The present invention provides a kind of gamma voltage generation circuit, and it includes the first divider resistance, first switch element, second opens
Close element, resistance string.Described first switch element includes the first path terminal, the first control end and alternate path end, and described first
Path terminal is passed through described first divider resistance and is received with reference to high voltage, and described first control end receives view angle switch control signal,
Described alternate path end ground connection.Described second switch element includes third path end, the second control end and fourth passage end, described
Third path end receives DC voltage, and described second control end is connected with the first path terminal of described first switch element.Described
Resistance string includes multiple second divider resistances, the fourth passage end phase of the first end of described resistance string and described second switch element
Even, the second end ground connection of described resistance string, the common port of each two second divider resistance is connected with source electrode drive circuit.
Preferably, described gamma voltage generation circuit also include first memory, second memory, timing control unit,
Gamma chip.Described first memory includes the first address pin, output pin, the first address pin of described first memory
It is connected with the first control end of described first switch element.Described second memory includes the first address pin, output pin, institute
The first address pin stating second memory is connected with the first path terminal of described first switch element.Described timing control unit
It is connected with the output pin of described first memory and the output pin of described second memory, for according to acquiescence identification address
Identify described first memory or described second memory, enable signal or stop signal to export.Described gamma chip is used for
The work when receiving described enable signal, and export gamma electric voltage, described gamma chip is additionally operable to receiving described stopping
Quit work during signal.
Preferably, described gamma voltage generation circuit also includes multiple filter capacitors, the first end of each filter capacitor with
The first end of each the second divider resistance corresponds and is connected, the second end ground connection of each filter capacitor.
Preferably, described first memory and second memory are EEPROM.
Preferably, the first control end of described first switch element passes through the 3rd divider resistance described view angle switch control of reception
Signal processed.
Preferably, the second control end of described second switch element passes through the 4th divider resistance and described first switch element
First path terminal be connected.
Preferably, described first switch element and described second switch element are N-type metal-oxide-semiconductor.
Preferably, described gamma chip and described source electrode drive circuit are integrated in driving plate.
The present invention also provides a kind of liquid crystal indicator, and described liquid crystal indicator includes above-mentioned gamma electric voltage and produces electricity
Road.
Preferably, described view angle switch control signal is low electricity when described liquid crystal indicator is wide viewing angle display module
Flat, it is high level when described liquid crystal indicator is narrow viewing angle display module.
The gamma voltage generation circuit of the present invention and liquid crystal indicator, by second switch element control DC voltage be
No input resistance string, thus control gamma to produce whether circuit provides gamma electric voltage by resistance string, and by arranging resistance string
The quantity of the second divider resistance and resistance can control the group number of gamma electric voltage and the magnitude of voltage of output, flexibility is good, design
Simply.
By the detailed description below with reference to accompanying drawing, the other side of the present invention and feature become obvious.But should know
Road, accompanying drawing be only explain purpose design, not as the restriction of the scope of the present invention, this is because its should refer to attached
Plus claim.It should also be noted that unless otherwise noted it is not necessary to scale accompanying drawing, they are only tried hard to conceptually
Structure described herein and flow process are described.
Brief description
Fig. 1 is the electrical block diagram of the gamma voltage generation circuit of first embodiment of the invention.
Fig. 2 is the electrical block diagram of the gamma voltage generation circuit of second embodiment of the invention.
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Although the present invention describes different elements, signal, port, assembly or portion using first, second, third, etc. term
Point, but these elements, signal, port, assembly or part are not limited by these terms.These terms are intended merely to one
Individual element, signal, port, assembly or part are made a distinction with another element, signal, port, assembly or part.In the present invention
In, element, port, assembly or part and another element, port, assembly or part " being connected ", " connection " it is possible to understand that
For being directly electrically connected with, or it can be appreciated that there is the indirect electric connection of intermediary element.Unless otherwise defined, otherwise originally
Invent all terms (including technical term and scientific terminology) being used to have and ordinary skill people of the art
The meaning that member is generally understood that.
Fig. 1 is the electrical block diagram of the gamma voltage generation circuit of first embodiment of the invention.As shown in figure 1,
Gamma voltage generation circuit 10 includes the first divider resistance R1, first switch element M1, second switch element M2, resistance string 100.
Wherein, first switch element M1 includes the first path terminal, the first control end and alternate path end, and the first path terminal is led to
Cross the first divider resistance R1 and receive with reference to high voltage DVDD33, the first control end receives view angle switch control signal NW, and second leads to
Terminal is grounded.
Specifically, first switch element M1 is N-type metal-oxide-semiconductor, and first path terminal of first switch element M1 is drain electrode, first
First control end of switch element M1 is grid, and the alternate path end of first switch element M1 is source electrode.Certainly, first switch unit
Part M1 can also be other types of switch element such as triode etc..
Wherein, second switch element M2 includes third path end, the second control end and fourth passage end, and third path terminates
Receive DC voltage AVDD, the second control end is connected with first path terminal of first switch element M1.
Specifically, second switch element M2 is N-type metal-oxide-semiconductor, and the third path end of second switch element M2 is drain electrode, second
Second control end of switch element M2 is grid, and the fourth passage end of second switch element M2 is source electrode.Certainly, second switch unit
Part M2 can also be other types of switch element such as triode etc..
Wherein, resistance string 100 includes multiple second divider resistance R2 (in figure illustrates 15), the first end of resistance string R2 with
The fourth passage end of second switch element M2 is connected, the second end ground connection of resistance string 100, the public affairs of each two the second divider resistance R2
Altogether end is connected with source electrode drive circuit (not shown), with export multigroup gamma electric voltage V1, V2, V3, V4, V5, V6, V7, V8,
V9, V10, V11, V12, V13, V14 are to source electrode drive circuit.
It will be appreciated by those skilled in the art that, the first partial pressure that resistance string 100 includes can be arranged as required to
The number of resistance R2 is arranging the output group number of gamma electric voltage, and can be arranged by arranging the resistance of the first divider resistance R2
The magnitude of voltage of gamma electric voltage.
Specifically, the first end of resistance string R2 refers to the first end of first the second divider resistance R2, the of resistance string 100
Two ends refer to second end of last the second divider resistance R2.
Preferably, gamma voltage generation circuit also includes multiple filter capacitor C1, and the first end of each filter capacitor C1 is divided
Do not correspond with the first end of each the second divider resistance R2 and be connected, the second end ground connection of each filter capacitor C1.
Preferably, first control end of first switch element M1 is passed through the 3rd divider resistance R3 reception view angle switch and is controlled letter
Number NW.
Preferably, second control end of second switch element M2 passes through the 4th divider resistance R4 and first switch element M1's
First path terminal is connected.
Specifically, when view angle switch control signal NW is low level, first switch element M1 ends, first switch element
First path terminal of M1 exports the view angle switch inverted control signal #NW of high level, second control end of second switch element M2
Receive the view angle switch inverted control signal #NW of high level, second switch element M2 turns on, resistance string 100 passes through the of conducting
The common port multigroup gamma electric voltage V1 of output of two switch element M2 reception DC voltage AVDD, each two the second divider resistance R2,
V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13, V14 are to source electrode drive circuit；When view angle switch control signal
When NW is high level, first switch element M1 turns on, and first path terminal of first switch element M1 exports low level visual angle and cuts
Change inverted control signal #NW, second control end of second switch element M2 receives low level view angle switch inverted control signal #
NW, second switch element M2 end.
By second switch element M2, the gamma voltage generation circuit of the present invention, controls whether DC voltage AVDD inputs electricity
Resistance string 100, thus control gamma to produce whether circuit 10 provides gamma electric voltage by resistance string 100, and by arranging resistance string
100 quantity of the second divider resistance R2 and resistance can control the group number of gamma electric voltage and the magnitude of voltage of output, flexibility is good,
Design is simple.
Fig. 2 is the electrical block diagram of the gamma voltage generation circuit of second embodiment of the invention.As shown in Fig. 2
The gamma voltage generation circuit 20 of the embodiment of the present invention includes the first divider resistance R1, first switch element M1, second switch unit
Part M2 (not shown in Fig. 2, refer to Fig. 1), resistance string 100 (not shown in Fig. 2, refer to Fig. 1), wherein, the first partial pressure electricity
Resistance R1, first switch element M1, second switch element M2, the concrete structure of resistance string 10 and annexation etc. refer to Fig. 1,
Will not be described here.
In the present embodiment, gamma voltage generation circuit 20 also includes first memory U1, second memory U2, sequential control
Unit 200 processed, gamma chip 201.
Preferably, first memory U1 and second memory U2 is EEPROM.Certainly ability
The technical staff in domain is it is understood that first memory U1 and second memory U2 can also be other types of memory.
Specifically, first memory U1 include the first address pin A0, the second address pin A1, the 3rd address pin A2,
First address pin A0 of output pin SCL/SDA, first memory U1 is connected with first control end of first switch element M1,
Second address pin A1 of first memory U1 receives with reference to high voltage DVDD33, the 3rd address pin A2 of first memory U1
Ground connection.Second memory U2 includes the first address pin A0, the second address pin A1, the 3rd address pin A2, output pin
First address pin A0 of SCL/SDA, second memory U2 is connected with first path terminal of first switch element M1, the first storage
Second address pin A1 of device U1 receives with reference to high voltage DVDD33, the 3rd address pin A2 ground connection of second memory U2.
Wherein, timing control unit 200 and the output pin SCL/SDA's and second memory U2 of first memory U1 is defeated
Go out pin SCL/SDA to be connected, for first memory U1 or second memory U2 is identified according to acquiescence identification address such as 010,
Enable signal or stop signal to export.Specifically, when the first address pin A0, second address pin of first memory U1
A1, the 3rd address pin A2 (wherein, 0 represent low level, 1 represents high level) when being respectively 010, and timing control unit 200 is known
Other first memory U1, when first address pin A0 of second memory U2, the second address pin A1, the 3rd address pin A2 are divided
(wherein, 0 Wei not represent low level, 1 represents high level) when 010, timing control unit 200 identifies second memory U2.
Wherein, gamma chip 201 is used for working when receiving and enabling signal, and exports gamma electric voltage, and gamma chip is also
For quitting work when receiving stop signal.
Preferably, gamma chip can be GMT G1632 or IML7939 etc. chip.
Preferably, gamma chip and source electrode drive circuit integrate and are for example integrated in driving plate, Ke Yiwei
Parade TC2058, parade TC2055 etc. integrated chip, with save space.But the present invention is not limited to this.
Specifically, when view angle switch control signal NW is low level, first switch element M1 ends, first switch element
First path terminal of M1 exports the view angle switch inverted control signal #NW of high level, second control end of second switch element M2
Receive the view angle switch inverted control signal #NW of high level, second switch element M2 turns on, resistance string 100 passes through the of conducting
The common port multigroup gamma electric voltage V1 of output of two switch element M2 reception DC voltage AVDD, each two the second divider resistance R2,
V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13, V14 are to source electrode drive circuit, simultaneously because first memory
First address pin A0 of U1 receives low level view angle switch control signal NW, and timing control unit 200 is known according to acquiescence
Program in first memory U1 is called thus exporting stop signal to gamma chip 201 so that gamma chip in other address 010
201 quit work；When view angle switch control signal NW is high level, first switch element M1 turns on, first switch element M1
First path terminal export low level view angle switch inverted control signal #NW, second switch element M2 second control termination
Receive low level view angle switch inverted control signal #NW, second switch element M2 ends, simultaneously because the of second memory U2
One address pin A0 receives low level view angle switch control signal #NW, and timing control unit 200 is according to acquiescence identification address
010 calls the program in second memory U2 thus outputing enable signal to gamma chip 201 so that gamma chip 201 works
And export multigroup gamma electric voltage.
The present invention also provides a kind of liquid crystal indicator, and the gamma that it is included as Fig. 1 or Fig. 2 produces voltage.Preferably, depending on
Angle switch-over control signal is low level when liquid crystal indicator is for wide viewing angle display module, is narrow viewing angle in liquid crystal indicator
It is high level during display module.
Specifically, when liquid crystal indicator is for wide viewing angle display module, view angle switch control signal NW is low level, the
One switch element M1 cut-off, first path terminal of first switch element M1 exports the view angle switch inverted control signal # of high level
Second control end of NW, second switch element M2 receives the view angle switch inverted control signal #NW of high level, second switch element
M2 turns on, and the second switch element M2 that resistance string 100 passes through conducting receives DC voltage AVDD, each two the second divider resistance R2
Common port export multigroup gamma electric voltage V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13, V14 to source electrode
Drive circuit, simultaneously because first address pin A0 of first memory U1 receives low level view angle switch control signal
NW, timing control unit 200 call program in first memory U1 thus export stop signal to gamma chip 201 so that
Gamma chip 201 quits work；When narrow viewing angle display module.View angle switch control signal NW is high level, first switch unit
Part M1 turns on, and first path terminal of first switch element M1 exports low level view angle switch inverted control signal #NW, and second opens
The second control end closing element M2 receives low level view angle switch inverted control signal #NW, and second switch element M2 ends, with
When low level view angle switch control signal #NW, SECO are received due to first address pin A0 of second memory U2
Unit 200 calls program in second memory U2 thus outputing enable signal to gamma chip 201 so that gamma chip 201
Work and export multigroup gamma electric voltage.
In brief, when liquid crystal indicator is for wide viewing angle display module, gamma voltage generation circuit utilizes resistance string
The common port of each two the second divider resistance R2 in 100 export multigroup gamma electric voltage V1, V2, V3, V4, V5, V6, V7, V8,
V9, V10, V11, V12, V13, V14, when liquid crystal indicator is for narrow viewing angle display module, gamma voltage generation circuit utilizes
Gamma chip 201 exports multigroup gamma electric voltage, thus realizing the different outputs requiring lower gamma electric voltage group at width visual angle.
The gamma voltage generation circuit of the present invention and liquid crystal indicator, by second switch element control DC voltage be
No input resistance string, thus control gamma to produce whether circuit provides gamma electric voltage by resistance string, and by arranging resistance string
The quantity of the second divider resistance and resistance can control the group number of gamma electric voltage and the magnitude of voltage of output, flexibility is good, design
Simply.
Specific case used herein is to the gamma voltage generation circuit of the present invention and liquid crystal indicator and embodiment party
Formula is set forth, and the explanation of embodiment of above is only intended to help and understands the method for the present invention and its core concept；Meanwhile,
For one of ordinary skill in the art, according to the thought of the present invention, all have in specific embodiments and applications and change
In place of change, to sum up, this specification content should not be construed as limitation of the present invention, and protection scope of the present invention should be with appended power
Profit requires to be defined.
Claims (10)
1. a kind of gamma voltage generation circuit is it is characterised in that include：
First divider resistance；
First switch element, including the first path terminal, the first control end and alternate path end, described first path terminal is passed through described
First divider resistance receives with reference to high voltage, and described first control end receives view angle switch control signal, described alternate path end
Ground connection；
Second switch element, including third path end, the second control end and fourth passage end, described third path end receives direct current
Voltage, described second control end is connected with the first path terminal of described first switch element；
Resistance string, described resistance string includes multiple second divider resistances, the first end of described resistance string and described second switch unit
The fourth passage end of part is connected, the second end ground connection of described resistance string, and the common port of each two second divider resistance is driven with source electrode
Dynamic circuit is connected.
2. gamma voltage generation circuit as claimed in claim 1 is it is characterised in that described gamma voltage generation circuit is also wrapped
Include：
First memory, including the first address pin, output pin, the first address pin of described first memory and described the
First control end of one switch element is connected；
Second memory, including the first address pin, output pin, the first address pin of described second memory and described the
First path terminal of one switch element is connected；
Timing control unit, the output pin of described timing control unit and described first memory and described second memory
Output pin is connected, and for first memory or described second memory according to acquiescence identification Address Recognition, is made with exporting
Can signal or stop signal；
Gamma chip, described gamma chip is used for the work when receiving described enable signal, and exports gamma electric voltage, described gal
Horse chip is additionally operable to quit work when receiving described stop signal.
3. gamma voltage generation circuit as claimed in claim 1 or 2 it is characterised in that described gamma voltage generation circuit also
Including multiple filter capacitors, the first end of each filter capacitor is corresponded with the first end of each the second divider resistance and is connected,
Second end ground connection of each filter capacitor.
4. gamma voltage generation circuit as claimed in claim 1 or 2 is it is characterised in that described first memory is deposited with second
Reservoir is EEPROM.
5. gamma voltage generation circuit as claimed in claim 1 or 2 it is characterised in that described first switch element first
Control end is passed through the 3rd divider resistance and is received described view angle switch control signal.
6. gamma voltage generation circuit as claimed in claim 1 or 2 it is characterised in that described second switch element second
Control end is connected with the first path terminal of described first switch element by the 4th divider resistance.
7. gamma voltage generation circuit as claimed in claim 1 or 2 it is characterised in that described first switch element with described
Second switch element is N-type metal-oxide-semiconductor.
8. gamma voltage generation circuit as claimed in claim 1 or 2 is it is characterised in that described gamma chip and described source electrode
Drive circuit is integrated in driving plate.
9. a kind of liquid crystal indicator is it is characterised in that described liquid crystal indicator includes gal as claimed in claim 1 or 2
Horse voltage generation circuit.
10. liquid crystal indicator as claimed in claim 9 is it is characterised in that described view angle switch control signal is in described liquid
Crystal device is to be low level during wide viewing angle display module, when described liquid crystal indicator is narrow viewing angle display module for height
Level.
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| CN201610957422.7A CN106409256B (en) | 2016-11-03 | 2016-11-03 | A kind of gamma voltage generation circuit and liquid crystal display device |
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| CN201610957422.7A CN106409256B (en) | 2016-11-03 | 2016-11-03 | A kind of gamma voltage generation circuit and liquid crystal display device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106782409A (en) * | 2017-02-16 | 2017-05-31 | 昆山龙腾光电有限公司 | For the control device and control method of liquid crystal display device |
| CN106847217A (en) * | 2017-03-03 | 2017-06-13 | 昆山龙腾光电有限公司 | Gamma voltage generation circuit, liquid crystal display device and driving method |
| CN107144989A (en) * | 2017-06-06 | 2017-09-08 | 昆山龙腾光电有限公司 | A kind of width view angle switch module and liquid crystal display device |
| CN108682403A (en) * | 2018-04-28 | 2018-10-19 | 昆山龙腾光电有限公司 | Gamma electric voltage switching device and liquid crystal display device |
| CN108962180A (en) * | 2018-09-19 | 2018-12-07 | 昆山龙腾光电有限公司 | Gamma switching circuit and liquid crystal display device |
| CN109559690A (en) * | 2018-12-04 | 2019-04-02 | 昆山龙腾光电有限公司 | Gamma voltage generation circuit, method and liquid crystal display device |
| CN109584818A (en) * | 2018-12-12 | 2019-04-05 | 武汉华星光电半导体显示技术有限公司 | Gamma bleeder circuit, voltage adjusting method and liquid crystal display device |
| WO2020024244A1 (en) * | 2018-08-03 | 2020-02-06 | 昆山龙腾光电股份有限公司 | Liquid crystal display apparatus |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: Kunshan Longteng Optronics Co., Ltd. |