CN107045860A - Liquid crystal display, display panel and its Vcom voltage compensation circuit - Google Patents
Liquid crystal display, display panel and its Vcom voltage compensation circuit Download PDFInfo
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- CN107045860A CN107045860A CN201710100357.0A CN201710100357A CN107045860A CN 107045860 A CN107045860 A CN 107045860A CN 201710100357 A CN201710100357 A CN 201710100357A CN 107045860 A CN107045860 A CN 107045860A
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- display panel
- differential amplifier
- voltage
- adjusting unit
- vcom
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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
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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 invention discloses Vcom voltage compensation circuit, display panel and the liquid crystal display of a kind of display panel, wherein, compensation circuit includes：Differential amplifier, the supply voltage Vcom of the positive input terminal input display panel of differential amplifier, negative input end is by the feedback voltage V feed of first resistor input display panel, the Vcom voltage after output end output compensation；Gain adjusting unit, gain adjusting unit is connected with differential amplifier, and its control end receives control signal, for the gain according to control signal adjust automatically differential amplifier；The control unit being connected with the control end of gain adjusting unit, for generating control signal according to Vcom voltage and Vfeed voltages, and control signal is exported to gain adjusting unit.The compensation circuit can not only realize the common mode inhibition of differential amplifier, differential amplification, moreover it is possible to realize the adjust automatically of its gain, and simple in construction, help to reduce circuit-board laying-out area, reduce cost.
Description
Technical field
The present invention relates to liquid crystal display display technology field, and in particular to a kind of Vcom voltage compensation electricity of display panel
Road, a kind of display panel and a kind of liquid crystal display.
Background technology
With the development of Display Technique, display effect more and more higher of the people to display.In order to reach more preferable display
Effect, the general display for compensating multiple using the reference voltage (Vcom) deflected by adjustable liquid crystal display molecule to adjust display is imitated
Really, the general Vcom voltage compensation circuit by using single amplifier differential amplifier of selection of Vcom voltage compensation multiple is realized,
With the compensation multiple of the Gain tuning Vcom voltage by adjusting differential amplifier.But used in current Vcom voltage compensation circuit
Single amplifier differential amplifier circuit peripheral circuit it is big, cause electronic component to increase, Layout areas are bigger, financial cost is more
It is high.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, the present invention
First purpose is the Vcom voltage compensation circuit for proposing a kind of display panel.The compensation circuit can not only realize differential put
The common mode inhibition of big device, differential amplification, additionally it is possible to realize the adjust automatically of its gain, and circuit structure is simple, contributes to
The layout area of circuit board is reduced, financial cost is reduced.
Second object of the present invention is to propose a kind of display panel.
Third object of the present invention is to propose a kind of liquid crystal display.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of Vcom voltage compensation electricity of display panel
Road, including：Differential amplifier, the supply voltage of the positive input terminal of the differential amplifier and the display panel provides end phase
Even, the negative input end of the differential amplifier provides end with the feedback voltage of the display panel by first resistor and is connected, institute
State the Vcom voltage after the output end output compensation of differential amplifier；Gain adjusting unit, the first of the gain adjusting unit
End is connected with the negative input end of the differential amplifier, the second end ground connection of the gain adjusting unit, the Gain tuning list
3rd end of member is connected with the output end of the differential amplifier, and the control end of the gain adjusting unit receives control signal,
The gain adjusting unit is used for the gain of the differential amplifier according to the control signal adjust automatically；Control unit, institute
The control end that control unit is stated with the gain adjusting unit is connected, and described control unit is used to be provided according to the supply voltage
The Vcom voltage provided and the feedback voltage is held to provide the Vfeed voltages generation control signal that end is provided, and will be described
Control signal is exported to the gain adjusting unit.
The Vcom voltage compensation circuit of the display panel of the embodiment of the present invention, by control unit according to supply voltage Vcom
With feedback voltage V feed output control signals, by gain adjusting unit according to the control signal adjust automatically differential amplifier
Gain, and then realize Vcom voltage compensate multiple adjustment.Thus, can not only realize differential amplifier common mode inhibition,
Differential amplification, additionally it is possible to realize that Vcom voltage compensates the adjust automatically of multiple, and circuit structure is simple, helps to reduce electricity
The layout area of road plate, reduces financial cost.
According to one embodiment of present invention, the gain adjusting unit includes：Second resistance, the one of the second resistance
End is connected with the negative input end of the differential amplifier；Controlled tr tube, the first end of the controlled tr tube and described second
The other end of resistance is connected, and the control pole of the controlled tr tube receives the control signal；3rd resistor, the 3rd resistor
One end be connected with the second end of the controlled tr tube, the other end of 3rd resistor ground connection；4th resistance, the described 4th
One end of resistance is connected with the other end of the second resistance and the first end of the controlled tr tube respectively, the 4th resistance
The other end be connected with the output end of the differential amplifier.
According to one embodiment of present invention, the controlled tr tube is N-channel junction field effect transistor.
According to one embodiment of present invention, the gain adjusting unit also includes the 5th resistance, and the 5th resistance connects
It is connected between the grid of the N-channel junction field effect transistor and source electrode.
According to one embodiment of present invention, the gain adjusting unit also includes diode, the anode of the diode
Be connected with the control pole of the controlled tr tube, the negative electrode of the diode as the gain adjusting unit control end.
According to one embodiment of present invention, described control unit include comparison circuit, the comparison circuit be used for pair
The absolute value of voltage difference between Vcom voltage and Vfeed voltages is compared with pre-determined threshold voltage, described control unit
The control signal is exported according to the comparative result of the comparison circuit.
According to one embodiment of present invention, when the absolute value of the voltage difference is less than the pre-determined threshold voltage,
Described control unit exports negative level control signal, and the gain of the differential amplifier is smaller；It is absolute when the voltage difference
When value is more than the pre-determined threshold voltage, described control unit output zero level control signal, the gain of the differential amplifier
It is larger.
To reach above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of display panel, and it includes above-mentioned show
Show the Vcom voltage compensation circuit of panel.
The display panel of the embodiment of the present invention, by above-mentioned Vcom voltage compensation circuit, can not only realize differential amplification
The common mode inhibition of device, differential amplification, additionally it is possible to realize the adjust automatically of Vcom voltage compensating gain, and Vcom voltage is compensated
Circuit structure is simple, helps to reduce the layout area of circuit board, reduces financial cost.
Further, third aspect present invention embodiment proposes a kind of liquid crystal display, and it includes above-mentioned display surface
Plate.
The liquid crystal display of the embodiment of the present invention, can not only by the Vcom voltage compensation circuit in above-mentioned display panel
Enough realize the common mode inhibition of differential amplifier, differential amplification, additionally it is possible to realize the adjust automatically of Vcom voltage compensating gain,
And Vcom voltage compensation circuit is simple in construction, helps to reduce the layout area of LCD circuit plate, reduce financial cost.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the circuit structure diagram of the Vcom voltage compensation circuit of display panel according to embodiments of the present invention；
Fig. 2 is the circuit diagram of the Vcom voltage compensation circuit of display panel according to an embodiment of the invention；And
Fig. 3 is the circuit diagram of the Vcom voltage compensation circuit of the display panel according to a specific example of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings the Vcom voltage compensation circuit for the display panel for describing to propose according to embodiments of the present invention, display
Panel and liquid crystal display.
Fig. 1 is the structure chart of the Vcom voltage compensation circuit of display panel according to embodiments of the present invention.As shown in figure 1,
The Vcom voltage compensation circuit of the display panel, including：Differential amplifier 10, first resistor R1, gain adjusting unit 20 and control
Unit 30 processed.
Wherein, the positive input terminal of differential amplifier 10 provides end with the supply voltage Vcom of display panel and is connected, differential to put
The negative input end of big device 10 provides end with the feedback voltage V feed of display panel by first resistor R1 and is connected, differential amplifier
Vcom voltage after 10 output end output compensation.The first end of gain adjusting unit 20 and the negative input end of differential amplifier 10
It is connected, the second end of gain adjusting unit 20 is grounded, the 3rd end of gain adjusting unit 20 and the output end of differential amplifier 10
It is connected, the control end of gain adjusting unit 20 receives control signal, and gain adjusting unit 20 is used to be adjusted automatically according to control signal
The gain of whole differential amplifier 10.Control unit 30 is connected with the control end of gain adjusting unit 20, and control unit 30 is used for root
The Vcom voltage and feedback voltage for providing end offer according to supply voltage provide the Vfeed voltages generation control signal that end is provided, and
Control signal is exported to gain adjusting unit 20.
Specifically, control unit 30 provides Vcom voltage and the feedback voltage offer end offer that end is provided according to supply voltage
Vfeed voltages generation control signal, and control signal is exported to gain adjusting unit 20, and then gain adjusting unit 20 can
It is differential with adjust automatically with the feedback resistance or input circuit damping resistance according to control signal adjust automatically differential amplifier 10
The gain (i.e. the compensation multiple of Vcom voltage) of amplifier 10.Thus, the compensation circuit not only has common mode inhibition, differential amplification
Function, additionally it is possible to realize that Vcom voltage compensates the adjust automatically of multiple, and it is simple in construction, help to reduce circuit-board laying-out face
Product, reduces financial cost.
In one embodiment of the invention, as shown in Fig. 2 gain adjusting unit 20 includes：Second resistance R2, controllable open
Close pipe V, 3rd resistor R3 and the 4th resistance R4.
Wherein, second resistance R2 one end is connected with the negative input end of differential amplifier 10；Controlled tr tube V first end
It is connected with the second resistance R2 other end, controlled tr tube V control pole receives control signal；3rd resistor R3 one end with can
The second end for controlling switching tube V is connected, 3rd resistor R3 other end ground connection；4th resistance R4 one end respectively with second resistance R2
The other end be connected with controlled tr tube V first end, the 4th resistance R4 other end and the output end phase of differential amplifier 10
Even.
Alternatively, controlled tr tube V can be N-channel junction field effect transistor.
Further, as shown in Fig. 2 gain adjusting unit 20 can also include the 5th resistance R5.Wherein, the 5th resistance R5
It is connected between the grid of N-channel junction field effect transistor and source electrode, to provide bias voltage for field-effect transistor V, and rises
The effect of bleed off resistance is to protect field-effect transistor V.
Specifically, as shown in Fig. 2 when differential amplifier positive input terminal ground connection, during the reversed feedthrough voltage Vfeed of negative input end,
There is following formula (1) establishment：
Wherein, Rx=R3+r, r are field-effect transistor V source and drain resistance.
OrderWhen the negative input end of differential amplifier 10 ground connection, positive input termination supply voltage
During Vcom, there is following formula (2) establishment：
Vout=(1+K) Vcom (2)
It can be obtained according to formula (1) and (2), the offset voltage Vcomout=Vcom+K for the Vcom that differential amplifier 10 is exported
(Vcom-Vfeed)。
In one embodiment of the invention, as shown in figure 3, gain adjusting unit 20 can be with diode D.Wherein, two
Pole pipe D anode is connected with controlled tr tube V control pole, diode D negative electrode as gain adjusting unit 20 control end.
Further, as shown in figure 3, control unit 30 can include comparison circuit 31, comparison circuit 31 is used for Vcom
The absolute value of voltage difference between voltage and Vfeed voltages and pre-determined threshold voltage VThresholdingIt is compared, the basis of control unit 30
The comparative result output control signal of comparison circuit 31.
Specifically, when the absolute value of voltage difference is less than pre-determined threshold voltage VThresholdingWhen, the output negative level control of control unit 30
Signal processed, the gain of differential amplifier 10 is smaller；When the absolute value of voltage difference is more than pre-determined threshold voltage VThresholdingWhen, control is single
Member output zero level control signal, the gain of differential amplifier 10 is larger.
Specifically, as shown in figure 3, when the absolute value of voltage difference is less than pre-determined threshold voltage VThresholding, i.e., | Vfeed-
Vcom | ＜ VThresholdingWhen, the output negative level control signal of control unit 30, diode D conductings, field-effect transistor V cut-offs, source and drain
Resistance r → ∞ (i.e. source and drain resistance r is intended to infinity), the gain of differential amplifier 10 is smaller, i.e. the compensation of Vcom voltage times
Number is smaller.
When the absolute value of voltage difference is more than pre-determined threshold voltage VThresholding, i.e., | Vfeed-Vcom |>VThresholdingWhen, control unit 30
Zero level control signal is exported, diode D is not turned on, field-effect transistor V conductings, (i.e. source and drain resistance r becomes for source and drain resistance r → 0
To in 0), the gain of differential amplifier 10 is larger, i.e. the compensation multiple of Vcom voltage is larger.
It should be noted that when the absolute value of voltage difference is equal to pre-determined threshold voltage VThresholding, i.e., | Vfeed-Vcom |=
VThresholdingWhen, control unit 30 can export negative level control signal or zero level control signal as needed, to adjust Vcom voltage
Compensation multiple, do not limit herein.
To sum up, the Vcom voltage compensation circuit of the display panel of the embodiment of the present invention, passes through supply voltage Vcom and feedback
Voltage Vfeed output control signals, field-effect transistor V turn-on and turn-off are controlled according to the control signal, to realize source and drain
Resistance r regulation, and then by the feedback resistance or input circuit damping resistance of source and drain resistance r adjust automatically differential amplifiers,
And finally realize the regulation of differential amplifer gain (i.e. Vcom voltage compensation multiple).Thus, differential amplification can not only be realized
The common mode inhibition of device, differential amplification, additionally it is possible to realize that Vcom voltage compensates the adjust automatically of multiple, and circuit structure letter
Single, used electronic component is less, helps to reduce the layout area of circuit board, reduces financial cost.
Further, the present invention proposes a kind of display panel, and it includes the display panel of the above embodiment of the present invention
Vcom voltage compensation circuit.
The display panel of the embodiment of the present invention, by above-mentioned Vcom voltage compensation circuit, can not only realize differential amplification
The common mode inhibition of device, differential amplification, additionally it is possible to realize that Vcom voltage compensates the adjust automatically of multiple, and Vcom voltage is compensated
Circuit structure is simple, and used electronic component is less, helps to reduce the layout area of circuit board, reduces financial cost.
Further, the present invention proposes a kind of liquid crystal display, and it includes the display surface of the above embodiment of the present invention
Plate.
The liquid crystal display of the embodiment of the present invention, can not only by the Vcom voltage compensation circuit in above-mentioned display panel
Enough realize the common mode inhibition of differential amplifier, differential amplification, additionally it is possible to realize that Vcom voltage compensates the adjust automatically of multiple,
And Vcom voltage compensation circuit is simple in construction, used electronic component is less, helps to reduce LCD circuit plate
Layout area, reduce financial cost.
In addition, other compositions of liquid crystal display according to embodiments of the present invention and effect are to the ordinary skill people of this area
All it is known for member, in order to reduce redundancy, does not repeat herein.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implies relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " the
One ", at least one this feature can be expressed or be implicitly included to the feature of " second ".In the description of the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (9)
1. a kind of Vcom voltage compensation circuit of display panel, it is characterised in that including：
Differential amplifier, the positive input terminal of the differential amplifier provides end with the supply voltage of the display panel and is connected, institute
The negative input end for stating differential amplifier is connected by first resistor with the feedback voltage offer end of the display panel, described differential
Vcom voltage after the output end output compensation of amplifier；
Gain adjusting unit, the first end of the gain adjusting unit is connected with the negative input end of the differential amplifier, described
The second end ground connection of gain adjusting unit, the 3rd end of the gain adjusting unit and the output end phase of the differential amplifier
Even, the control end of the gain adjusting unit receives control signal, and the gain adjusting unit is used for according to the control signal
The gain of differential amplifier described in adjust automatically；
Control unit, described control unit is connected with the control end of the gain adjusting unit, and described control unit is used for basis
The Vcom voltage and the feedback voltage that the supply voltage provides end offer provide the Vfeed voltages generation control that end is provided
Signal processed, and the control signal is exported to the gain adjusting unit.
2. the Vcom voltage compensation circuit of display panel as claimed in claim 1, it is characterised in that the gain adjusting unit
Including：
Second resistance, one end of the second resistance is connected with the negative input end of the differential amplifier；
Controlled tr tube, the first end of the controlled tr tube is connected with the other end of the second resistance, the gate-controlled switch
The control pole of pipe receives the control signal；
3rd resistor, one end of the 3rd resistor is connected with the second end of the controlled tr tube, the 3rd resistor it is another
One end is grounded；
4th resistance, one end of the 4th resistance respectively with the other end of the second resistance and the controlled tr tube
One end is connected, and the other end of the 4th resistance is connected with the output end of the differential amplifier.
3. the Vcom voltage compensation circuit of display panel as claimed in claim 2, it is characterised in that the controlled tr tube is
N-channel junction field effect transistor.
4. the Vcom voltage compensation circuit of display panel as claimed in claim 3, it is characterised in that the gain adjusting unit
Also include the 5th resistance, the 5th resistance is connected between the grid of the N-channel junction field effect transistor and source electrode.
5. the Vcom voltage compensation circuit of the display panel as any one of claim 2-4, it is characterised in that the increasing
Beneficial adjustment unit also includes diode, and the anode of the diode is connected with the control pole of the controlled tr tube, two pole
The negative electrode of pipe as the gain adjusting unit control end.
6. the Vcom voltage compensation circuit of display panel as claimed in claim 5, it is characterised in that described control unit includes
Comparison circuit, the comparison circuit is used for absolute value and pre- gating to the voltage difference between Vcom voltage and Vfeed voltages
Voltage limit is compared, and described control unit exports the control signal according to the comparative result of the comparison circuit.
7. the Vcom voltage compensation circuit of display panel as claimed in claim 6, it is characterised in that
When the absolute value of the voltage difference is less than the pre-determined threshold voltage, described control unit output negative level control letter
Number, the gain of the differential amplifier is smaller；
When the absolute value of the voltage difference is more than the pre-determined threshold voltage, described control unit output zero level control letter
Number, the gain of the differential amplifier is larger.
8. a kind of display panel, it is characterised in that the Vcom electricity including the display panel as any one of claim 1-7
Press compensation circuit.
9. a kind of liquid crystal display, it is characterised in that including display panel as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100357.0A CN107045860B (en) | 2017-02-23 | 2017-02-23 | Liquid crystal display, display panel and its Vcom voltage compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100357.0A CN107045860B (en) | 2017-02-23 | 2017-02-23 | Liquid crystal display, display panel and its Vcom voltage compensation circuit |
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| Publication Number | Publication Date |
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| CN107045860A true CN107045860A (en) | 2017-08-15 |
| CN107045860B CN107045860B (en) | 2019-08-02 |
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ID=59545374
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|---|---|---|---|
| CN201710100357.0A Active CN107045860B (en) | 2017-02-23 | 2017-02-23 | Liquid crystal display, display panel and its Vcom voltage compensation circuit |
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| CN108665841A (en) * | 2018-05-09 | 2018-10-16 | 京东方科技集团股份有限公司 | Common electrode voltage compensation circuit and display device |
| CN107045860B (en) * | 2017-02-23 | 2019-08-02 | 京东方科技集团股份有限公司 | Liquid crystal display, display panel and its Vcom voltage compensation circuit |
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| KR20140060007A (en) * | 2012-11-09 | 2014-05-19 | 엘지디스플레이 주식회사 | Liquid crystal display and driving method thereof |
| CN105469767A (en) * | 2016-01-05 | 2016-04-06 | 京东方科技集团股份有限公司 | Common voltage compensation circuit, compensation method, display panel and display device |
| CN106023877A (en) * | 2016-08-15 | 2016-10-12 | 京东方科技集团股份有限公司 | Public voltage adjusting circuit and method and display panel and device |
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| CN106328035A (en) * | 2016-08-23 | 2017-01-11 | 京东方科技集团股份有限公司 | Common voltage compensating circuit, common voltage compensating method, display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107045860B (en) * | 2017-02-23 | 2019-08-02 | 京东方科技集团股份有限公司 | Liquid crystal display, display panel and its Vcom voltage compensation circuit |
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| CN102292757A (en) * | 2008-12-11 | 2011-12-21 | 索尼公司 | Display apparatus, luminance adjusting device, luminance adjusting method, and program |
| KR20140060007A (en) * | 2012-11-09 | 2014-05-19 | 엘지디스플레이 주식회사 | Liquid crystal display and driving method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107045860B (en) * | 2017-02-23 | 2019-08-02 | 京东方科技集团股份有限公司 | Liquid crystal display, display panel and its Vcom voltage compensation circuit |
| CN108665841A (en) * | 2018-05-09 | 2018-10-16 | 京东方科技集团股份有限公司 | Common electrode voltage compensation circuit and display device |
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| Publication number | Publication date |
|---|---|
| CN107045860B (en) | 2019-08-02 |
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