WO2018201513A1 - 液晶显示面板及其公共电压补偿方法、装置 - Google Patents

液晶显示面板及其公共电压补偿方法、装置 Download PDF

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Publication number
WO2018201513A1
WO2018201513A1 PCT/CN2017/083825 CN2017083825W WO2018201513A1 WO 2018201513 A1 WO2018201513 A1 WO 2018201513A1 CN 2017083825 W CN2017083825 W CN 2017083825W WO 2018201513 A1 WO2018201513 A1 WO 2018201513A1
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Prior art keywords
liquid crystal
common voltage
common electrode
display panel
common
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PCT/CN2017/083825
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English (en)
French (fr)
Inventor
赵丽
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深圳市华星光电技术有限公司
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Priority to US15/545,714 priority Critical patent/US10565950B2/en
Publication of WO2018201513A1 publication Critical patent/WO2018201513A1/zh

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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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G09G2300/0447—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • 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
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • 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
    • G09G2320/0257—Reduction of after-image effects

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a liquid crystal display panel and a common voltage compensation method and apparatus thereof.
  • a liquid crystal display is one of the most widely used flat panel displays, and the LCD includes a pair of panels provided with field generating electrodes such as pixel electrodes and common electrodes, and liquid crystals disposed between the two panels (Liquid Crystal, LC) layer.
  • field generating electrodes such as pixel electrodes and common electrodes
  • liquid crystals disposed between the two panels (Liquid Crystal, LC) layer.
  • the electric field determines the orientation of the LC molecules in the liquid crystal layer, thereby adjusting the polarization of light incident on the LC layer, causing the LCD to display an image.
  • the pixels in the liquid crystal display panel can be changed from a 4-domain architecture to an 8-domain architecture.
  • one sub-pixel unit is divided into a main pixel region and a sub-pixel region, and a thin film transistor (TFT) is added in the sub-pixel region to release a partial charge on the liquid crystal capacitor in the sub-pixel region to
  • TFT thin film transistor
  • the common electrode of the storage capacitor is such that the pixel voltage and the display luminance in the main pixel region and the sub-pixel region are different, thereby achieving an effect of improving color shift.
  • this method causes the voltage on the common electrode of the storage capacitor to be unstable, and is susceptible to coupling of other signals, thereby causing defects such as crosstalk and image sticking.
  • Embodiments of the present invention provide a liquid crystal display panel and a common voltage compensation method and apparatus thereof, which improve the stability of a common voltage, reduce the risk of occurrence of crosstalk and image sticking, and improve the quality of the liquid crystal display panel.
  • a liquid crystal display panel comprising: an array substrate and a common voltage compensation circuit, the array substrate a plurality of scanning lines arranged in parallel in a horizontal direction, a plurality of data lines arranged in parallel in a vertical direction, a plurality of common electrode lines, and a plurality of sub-pixel units arranged in an array, wherein the scanning lines are used for
  • the sub-pixel unit provides a driving voltage
  • the data line is used to provide a data voltage for the sub-pixel unit
  • the common electrode line is used to provide a common voltage for the sub-pixel unit
  • the common voltage compensation circuit includes a feedback signal a processor, an amplifier, and a common voltage adjustment circuit, wherein the feedback signal processor is coupled to the common electrode line for acquiring a feedback signal of the common voltage, and performing inverse processing on the feedback signal, the amplifier connection
  • the common voltage adjustment circuit is configured to input the compensation signal to the Common electrode line.
  • the liquid crystal display panel further includes a driving circuit board.
  • the driving circuit board is disposed on one side of the array substrate, and is electrically connected to the array substrate through a first signal port and a second signal port.
  • a common voltage compensation circuit is disposed on the driving circuit board to acquire a feedback signal of the common voltage through the first signal port, and provide the compensation signal to the common electrode line through the second signal port .
  • the plurality of common electrode lines and the plurality of scan lines are alternately arranged in parallel with each other, and are commonly connected to the output end of the common voltage adjusting circuit through the second signal port for adjusting from the common voltage
  • the circuit acquires a common voltage
  • the array substrate further includes a first feedback connection point, the first feedback connection point is disposed at one end of a common electrode line located at an intermediate position of the array substrate, and the feedback signal processor passes the first signal
  • the port is connected to the first feedback connection point for acquiring a feedback signal of the common voltage from the first feedback connection point.
  • the array substrate further includes a second feedback connection point, and the second feedback connection point is disposed at one end of the common electrode line on a side of the array substrate relative to the driving circuit board, and the feedback signal processing
  • the device is connected to the second feedback connection point through the first signal port, and is configured to acquire a feedback signal of the common voltage from the second feedback connection point.
  • the sub-pixel unit includes a main pixel area and a sub-pixel area, and each of the main pixel area and the sub-pixel area includes a driving transistor, a storage capacitor, and a liquid crystal capacitor, and the sub-pixel area further includes a drain. And a discharge transistor for discharging a portion of the charge on the liquid crystal capacitor of the sub-pixel region onto the common electrode line.
  • the main pixel region includes a first transistor, a first storage capacitor and a first liquid crystal capacitor, a gate of the first transistor is connected to the scan line, a drain of the first transistor and the data line Connecting, the source of the first transistor is connected to one end of the first storage capacitor and the first liquid crystal capacitor, and the other end of the first storage capacitor is connected to the common electrode line, the first liquid crystal capacitor The other end is used to connect the common electrode.
  • the sub-pixel region includes a second transistor, a second storage capacitor, a second liquid crystal capacitor, and a third transistor, a gate of the second transistor is connected to the scan line, and a drain of the second transistor is The data line is connected, the source of the second transistor is connected to one end of the second storage capacitor and the second liquid crystal capacitor, and the other end of the second storage capacitor is connected to the common electrode line, the first The other end of the two liquid crystal capacitors is for connecting a common electrode, the gate of the third transistor is connected to the scan line, the drain of the third transistor is connected to the source of the second transistor, the third A source of the transistor is connected to the common electrode line.
  • a common voltage compensation method for a liquid crystal display panel comprising:
  • the compensation signal is input to the common electrode line to compensate the common voltage by the compensation signal.
  • a common voltage compensation device for a liquid crystal display panel comprising:
  • a voltage acquisition unit configured to acquire a feedback signal of a common voltage on a common electrode line of the liquid crystal display panel
  • An inverting processing unit configured to perform inversion and amplification processing on the feedback signal to obtain a corresponding compensation signal
  • a voltage compensation unit configured to input the compensation signal to the common electrode line to compensate the common voltage by the compensation signal.
  • the liquid crystal display panel acquires a feedback signal of a common voltage on the common electrode line by setting the common voltage compensation circuit, and inverts and amplifies the feedback signal to obtain a corresponding compensation signal, thereby
  • the compensation signal is input to the common electrode line to realize compensation of the common voltage, which can effectively improve the stability of the common voltage, and prevent crosstalk and image residue of the liquid crystal display panel due to fluctuation of the common voltage. And other issues, improve the product of the LCD panel quality.
  • FIG. 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing waveform comparison of a common voltage, a feedback signal, an inverted feedback signal, and a compensation signal of a liquid crystal display panel at a first feedback connection point according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing waveform comparisons of a common voltage, a feedback signal, an inverted feedback signal, and a compensation signal of a liquid crystal display panel at a second feedback connection point according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a sub-pixel unit of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a public voltage compensation method according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a common voltage compensation apparatus according to an embodiment of the present invention.
  • a liquid crystal display panel 100 includes an array substrate 110 and a common voltage compensation circuit 130.
  • the array substrate 110 includes a plurality of scan lines arranged in parallel in a horizontal direction. 111.
  • a voltage the data line 113 is used to provide a data voltage for the sub-pixel unit 117
  • the common electrode line 115 is used to provide a common voltage for the sub-pixel unit 117
  • the common voltage compensation circuit 130 includes feedback signal processing.
  • the amplifier 131 and the common voltage adjusting circuit 135 are connected to the common electrode line 115 for acquiring a feedback signal of the common voltage, and performing inverse processing on the feedback signal.
  • the amplifier 133 is connected between the feedback signal processor 131 and the common voltage adjustment circuit 135 for amplifying the inverted feedback signal. A compensation signal is obtained, and the common voltage adjustment circuit 135 is configured to input the compensation signal to the common electrode line 115 to compensate the common voltage.
  • the feedback signal processor 131 may process the feedback signal of the acquired common voltage, such as filtering, inverting, and the like. Since the obtained feedback signal may be affected by factors such as the coupling of other signals on the array substrate 110 and the impedance of the signal trace during transmission, the signal obtained after the inversion may not reach the voltage actually required to be compensated.
  • the value is obtained by setting the amplifier 133 in the subsequent stage circuit of the feedback signal processor 131 to amplify the inverted common voltage, thereby obtaining a desired compensation signal. It can be understood that the amplification The magnification of the 133 can be changed according to actual needs.
  • the pixel voltage on the sub-pixel unit 117 may be unstable, thereby causing defects such as crosstalk and image sticking.
  • the feedback signal of the common voltage on the common electrode line 115 is acquired, and the feedback signal is inverted and amplified to obtain a corresponding compensation signal, thereby superimposing the compensation signal.
  • the stability of the common voltage can be effectively improved.
  • the liquid crystal display panel 100 further includes a driving circuit board 150 disposed on one side of the array substrate 110 and electrically connected to the array substrate 110 through the first signal port 151 and the second signal port 153. Sexual connection.
  • the common voltage compensation circuit 130 may be disposed on the driving circuit board 150 to acquire a feedback signal of the common voltage through the first signal port 151, and the compensation signal is sent through the second signal port 153 Provided to the common electrode line 115.
  • the plurality of common electrode lines 115 and the plurality of scan lines 111 are alternately arranged in parallel with each other, and are commonly connected to the output end of the common voltage adjusting circuit 135 through the second signal port 153 for
  • the common voltage adjustment circuit 135 acquires a common voltage. Since the transmission distance of the common voltage from the common voltage adjustment circuit 135 to different common electrode lines is different, and the coupling of other signals on the array substrate may cause common electrode lines at different positions of the array substrate. There is a difference between the common voltages, for example, the fluctuation amplitude of the common voltage on the common electrode line on the side far from the driving circuit board 150 may be larger than the common voltage on the common electrode line on the side close to the driving circuit board 150. The fluctuation range is large. Therefore, different feedback signal acquisition points can be set to obtain different compensation signals to achieve different compensation effects.
  • the array substrate 110 further includes a first feedback connection point 112 disposed at one end of the common electrode line 115 at an intermediate position of the array substrate 110.
  • the feedback signal processor 131 is connected to the first feedback connection point 112 through the first signal port 151 for acquiring a feedback signal of the common voltage from the first feedback connection point 112.
  • the feedback signal Va1 includes a positive pulse having an amplitude of A1, that is, the common There is a positive interference pulse in the voltage, and the amplitude of the positive interference pulse may be larger than the amplitude A1 of the positive pulse included in the feedback signal Va1.
  • the obtained feedback signal Vb1 includes a negative pulse of amplitude A1, and further amplifying the feedback signal Vb1 to obtain a compensation signal Vc1 by adjusting the amplification of the amplifier 133.
  • the compensation signal Vc1 is input to the common electrode line 115, so that The positive interference pulse in the common voltage is just cancelled by the negative pulse in the compensation signal Vc1, thereby achieving compensation for the common voltage.
  • the array substrate 110 further includes a second feedback connection point 114, and the second feedback connection point 114 is disposed on a common side of the array substrate 110 opposite to the driving circuit board 150.
  • One end of the electrode line 115, the feedback signal processor 131 is connected to the second feedback connection point 114 through the first signal port 151 for obtaining feedback of the common voltage from the second feedback connection point 114 signal.
  • the feedback signal obtained from the second feedback connection point 114 is Va2
  • the feedback signal after the inverse processing is Vb2
  • the resulting compensation signal is Vc2.
  • the feedback signal Va2 includes a positive pulse having an amplitude of A2, that is, a positive interference pulse exists in the common voltage, and the amplitude of the positive interference pulse may be larger than the amplitude A2 of the positive pulse included in the feedback signal Va2.
  • the feedback signal Vb2 includes a negative pulse of amplitude A2, and further amplifying the feedback signal Vb2 to obtain a compensation signal Vc2, by adjusting the amplification of the amplifier 133.
  • the compensation signal Vc2 is input to the common electrode line 115, so that The positive interfering pulse in the common voltage is just cancelled by the negative pulse in the compensation signal Vc2, thereby achieving compensation for the common voltage.
  • the amplitude A1 of the positive pulse in the feedback signal Va1 and the amplitude A2 of the positive pulse in the feedback signal Va2 may also be different.
  • the amplitude A2 of the positive pulse in the feedback signal Va2 is greater than the amplitude A1 of the positive pulse in the feedback signal Va1. Therefore, when the common voltage is compensated, the compensation signal Vc2 is relative to The compensation signal Vc1 has a larger compensation amplitude.
  • the sub-pixel unit 117 includes a main pixel area 1171 and a sub-pixel area 1173.
  • the main pixel area 1171 and the sub-pixel area 1173 each include a driving transistor TFT1, TFT1, and a storage capacitor Cst1.
  • Cst2 and a liquid crystal capacitor Clc1, Clc2 for supplying a common voltage to the storage capacitors Cst1, Cst2, the sub-pixel region 1173 further comprising a bleeder transistor TFT3 for using the sub-pixel region A portion of the charge on the liquid crystal capacitor Clc2 of 1173 is released onto the common electrode line 115.
  • the liquid crystal display panel 100 is an 8-domain 3TFT driving structure.
  • the liquid crystal capacitor of the sub-pixel region 1173 is passed through the bleeder transistor TFT3.
  • the charge portion on Clc2 is released onto the common electrode line 115, so that the pixel voltage and the display luminance in the main pixel region 1171 and the sub-pixel region 1173 can be made different, thereby achieving an effect of improving color shift.
  • the main pixel region 1171 includes a first transistor TFT1, a first storage capacitor Cst1, and a first liquid crystal capacitor Clc1, and a gate of the first transistor TFT1 is connected to the scan line 111, and the first transistor TFT1 a drain is connected to the data line 113, a source of the first transistor TFT1 is connected to one end of the first storage capacitor Cst1 and the first liquid crystal capacitor Clc1, and the other end of the first storage capacitor Cst1 is connected The other end of the first liquid crystal capacitor Clc1 is used to connect the common electrode 119, wherein the common electrode 119 is located on a color filter (CF) substrate of the liquid crystal display panel.
  • CF color filter
  • the sub-pixel region 1173 includes a second transistor TFT2, a second storage capacitor Cst2, a second liquid crystal capacitor Clc2, and a third transistor TFT3.
  • the gate of the second transistor TFT2 is connected to the scan line 111, and the second The drain of the transistor TFT2 is connected to the data line 113, the source of the second transistor TFT2 is connected to one end of the second storage capacitor Cst2 and the second liquid crystal capacitor Clc2, and the second storage capacitor Cst2 is another One end of the second liquid crystal capacitor Clc2 is connected to the common electrode 119, and the gate of the third transistor TFT3 is connected to the scan line 111.
  • the third transistor is connected to the common electrode line 115.
  • the drain of the TFT 3 is connected to the source of the second transistor TFT2, and the source of the third transistor TFT3 is connected to the common electrode line 115.
  • the feedback signal of the common voltage on the common electrode line 115 is obtained, and the feedback signal is inverted and amplified to obtain a corresponding compensation signal, and then the compensation signal is input to the On the common electrode line 115, compensation for the common voltage is achieved, which can effectively improve the stability of the common voltage, prevent crosstalk and image sticking of the liquid crystal display panel due to the fluctuation of the common voltage, and improve the liquid crystal. The quality of the display panel.
  • a method for compensating a common voltage of a liquid crystal display panel includes:
  • Step 501 Acquire a feedback signal of a common voltage on a common electrode line of the liquid crystal display panel.
  • Step 502 Perform inversion and amplification processing on the feedback signal to obtain a corresponding compensation signal.
  • Step 503 Input the compensation signal into the common electrode line to compensate the common voltage by the compensation signal.
  • a common voltage compensation device 600 for a liquid crystal display panel including:
  • a voltage acquisition unit 601 configured to acquire a feedback signal of a common voltage on a common electrode line of the liquid crystal display panel
  • the inverting processing unit 602 is configured to perform inversion and amplification processing on the feedback signal to obtain a corresponding compensation signal;
  • the voltage compensation unit 603 is configured to input the compensation signal into the common electrode line to compensate the common voltage by the compensation signal.
  • the liquid crystal display panel acquires a feedback signal of a common voltage on the common electrode line by setting the common voltage compensation circuit, and inverts and amplifies the feedback signal to obtain a corresponding compensation signal, thereby
  • the compensation signal is input to the common electrode line to realize compensation of the common voltage, which can effectively improve the stability of the common voltage, and prevent crosstalk and image residue of the liquid crystal display panel due to fluctuation of the common voltage. And other issues, improve the product of the LCD panel quality.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

一种液晶显示面板(100)、公共电压补偿方法及装置(600)，液晶显示面板(100)包括：阵列基板(110)及公共电压补偿电路(130)，阵列基板(110)包括多条扫描线(111)、多条数据线(113)、多条公共电极线(115)和多个呈阵列设置的子像素单元(117)，扫描线(111)用于为子像素单元(117)提供驱动电压，数据线(113)用于为子像素单元(117)提供数据电压，公共电极线(115)用于为子像素单元(117)提供公共电压，公共电压补偿电路(130)包括反馈信号处理器(131)、放大器(133)和公共电压调整电路(135)，反馈信号处理器(131)与公共电极线(115)连接，用于获取公共电压的反馈信号，放大器(133)用于对反相后的反馈信号进行放大得到补偿信号，公共电压调整电路(135)用于将补偿信号输入到公共电极线(115)上。可提升液晶显示面板(100)的公共电压稳定性。

Description

液晶显示面板及其公共电压补偿方法、装置
本发明要求2017年5月3日递交的发明名称为“液晶显示面板及其公共电压补偿方法、装置”的申请号(201710305053.8)的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示面板及其公共电压补偿方法、装置。
背景技术
液晶显示器(Liquid Crystal Display，LCD)是最广泛使用的平板显示器之一，LCD包括设置有场发生电极诸如像素电极和公共电极的一对面板以及设置在两个面板之间的液晶(Liquid Crystal，LC)层。当电压被施加到场发生电极从而在LC层中产生电场，该电场决定了液晶层中的LC分子的取向，从而调整入射到LC层的光的偏振，使LCD显示图像。为改善大视角LCD的色偏问题，可以将液晶显示面板中的像素由4畴(domain)架构变成8domain架构。在8domain架构中，一个子像素单元被划分为主像素区域和次像素区域，通过在次像素区域增设一个薄膜晶体管晶体管(Thin Film Transistor，TFT)来释放次像素区域中液晶电容上的部分电荷至存储电容的公共电极上，从而使得主像素区域和次像素区域内的像素电压和显示亮度不同，进而达成改善色偏的效果。然而，该方式会导致存储电容的公共电极上的电压不稳，且易收到其他信号的耦合，从而引发串扰(crosstalk)、影像残留(image sticking)等缺陷。
发明内容
本发明实施例提供一种液晶显示面板及其公共电压补偿方法、装置，以提升公共电压的稳定性，降低串扰和影像残留等问题发生的风险，提升液晶显示面板的品质。
一种液晶显示面板，包括：阵列基板及公共电压补偿电路，所述阵列基板 包括多条沿水平方向平行间隔设置的扫描线、多条沿竖直方向平行间隔设置的数据线、多条公共电极线和多个呈阵列设置的子像素单元，所述扫描线用于为所述子像素单元提供驱动电压，所述数据线用于为所述子像素单元提供数据电压，所述公共电极线用于为所述子像素单元提供公共电压，所述公共电压补偿电路包括反馈信号处理器、放大器和公共电压调整电路，所述反馈信号处理器与所述公共电极线连接，用于获取所述公共电压的反馈信号，并对所述反馈信号进行反相处理，所述放大器连接于所述反馈信号处理器与所述公共电压调整电路之间，用于对反相后的反馈信号进行放大处理得到补偿信号，所述公共电压调整电路用于将所述补偿信号输入到所述公共电极线上。
其中，所述液晶显示面板还包括驱动电路板，所述驱动电路板设置于所述阵列基板的一侧，并通过第一信号端口及第二信号端口与所述阵列基板电性连接，所述公共电压补偿电路设置于所述驱动电路板上，以通过所述第一信号端口获取所述公共电压的反馈信号，并通过所述第二信号端口将所述补偿信号提供给所述公共电极线。
其中，所述多条公共电极线与所述多条扫描线相互平行交替设置，并通过所述第二信号端口共同连接至所述公共电压调整电路的输出端，用于从所述公共电压调整电路获取公共电压。
其中，所述阵列基板还包括第一反馈连接点，所述第一反馈连接点设置于位于所述阵列基板的中间位置的公共电极线的一端，所述反馈信号处理器通过所述第一信号端口与所述第一反馈连接点连接，用于从所述第一反馈连接点获取所述公共电压的反馈信号。
其中，所述阵列基板还包括第二反馈连接点，所述第二反馈连接点设置于位于所述阵列基板相对于所述驱动电路板的一侧的公共电极线的一端，所述反馈信号处理器通过所述第一信号端口与所述第二反馈连接点连接，用于从所述第二反馈连接点获取所述公共电压的反馈信号。
其中，所述子像素单元包括主像素区域和次像素区域，所述主像素区域和所述次像素区域中各包括一个驱动晶体管、一个存储电容和一个液晶电容，所述次像素区域还包括泄放晶体管，用于将所述次像素区域的液晶电容上的电荷部分释放至所述公共电极线上。
其中，所述主像素区域包括第一晶体管、第一存储电容及第一液晶电容，所述第一晶体管的栅极与所述扫描线连接，所述第一晶体管的漏极与所述数据线连接，所述第一晶体管的源极连接所述第一存储电容和所述第一液晶电容的一端，所述第一存储电容的另一端连接所述公共电极线，所述第一液晶电容的另一端用于连接公共电极。
其中，所述次像素区域包括第二晶体管、第二存储电容、第二液晶电容及第三晶体管，所述第二晶体管的栅极与所述扫描线连接，所述第二晶体管的漏极与所述数据线连接，所述第二晶体管的源极连接所述第二存储电容和所述第二液晶电容的一端，所述第二存储电容的另一端连接所述公共电极线，所述第二液晶电容的另一端用于连接公共电极，所述第三晶体管的栅极与所述扫描线连接，所述第三晶体管的漏极与所述第二晶体管的源极连接，所述第三晶体管的源极连接所述公共电极线。
一种液晶显示面板的公共电压补偿方法，包括：
获取液晶显示面板的公共电极线上的公共电压的反馈信号；
对所述反馈信号进行反相和放大处理，得到对应的补偿信号；
将所述补偿信号输入所述公共电极线，以通过所述补偿信号对所述公共电压进行补偿。
一种液晶显示面板的公共电压补偿装置，包括：
电压获取单元，用于获取液晶显示面板的公共电极线上的公共电压的反馈信号；
反相处理单元，用于对所述反馈信号进行反相和放大处理，得到对应的补偿信号；
电压补偿单元，用于将所述补偿信号输入所述公共电极线，以通过所述补偿信号对所述公共电压进行补偿。
所述液晶显示面板通过设置所述公共电压补偿电路，获取所述公共电极线上的公共电压的反馈信号，并对所述反馈信号进行反相、放大处理，得到对应的补偿信号，进而将所述补偿信号输入到所述公共电极线上，实现对所述公共电压的补偿，可以有效提升所述公共电压的稳定性，防止因所述公共电压的波动而导致液晶显示面板出现串扰和影像残留等问题，提升液晶显示面板的品 质。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的液晶显示面板的结构示意图；
图2是本发明实施例提供的液晶显示面板在第一反馈连接点的公共电压及其反馈信号、反相的反馈信号及补偿信号的波形对比示意图；
图3是本发明实施例提供的液晶显示面板在第二反馈连接点的公共电压及其反馈信号、反相的反馈信号及补偿信号的波形对比示意图；
图4是本发明实施例提供的液晶显示面板的子像素单元的结构示意图；
图5是本发明实施例提供的公共电压补偿方法的流程示意图；
图6是本发明实施例提供的公共电压补偿装置的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
为便于描述，这里可以使用诸如“在…之下”、“在…下面”、“下”、“在…之上”、“上”等空间相对性术语来描述如图中所示的一个元件或特征与另一个(些)元件或特征的关系。可以理解，当一个元件或层被称为在另一元件或层“上”、“连接到”或“耦接到”另一元件或层时，它可以直接在另一元件或层上、直接连接到或耦接到另一元件或层，或者可以存在居间元件或层。相反，当一个元件被称为“直接在”另一元件或层上、“直接连接到”或“直接耦接到”另一元件或层时，不存在居间元件或层。
可以理解，这里所用的术语仅是为了描述特定实施例，并非要限制本发明。 在这里使用时，除非上下文另有明确表述，否则单数形式“一”和“该”也旨在包括复数形式。进一步地，当在本说明书中使用时，术语“包括”和/或“包含”表明所述特征、整体、步骤、操作、元件和/或组件的存在，但不排除一个或多个其他特征、整体、步骤、操作、元件、组件和/或其组合的存在或增加。
除非另行定义，这里使用的所有术语(包括技术术语和科学术语)都具有本发明所属领域内的普通技术人员所通常理解的相同含义。将进一步理解，诸如通用词典中所定义的术语，否则应当被解释为具有与它们在相关领域的语境中的含义相一致的含义，而不应被解释为理想化或过度形式化的意义，除非在此明确地如此定义。
请参阅图1，在本发明一个实施例中，提供一种液晶显示面板100，包括：阵列基板110及公共电压补偿电路130，所述阵列基板110包括多条沿水平方向平行间隔设置的扫描线111、多条沿竖直方向平行间隔设置的数据线113、多条公共电极线115和多个呈阵列设置的子像素单元117，所述扫描线111用于为所述子像素单元117提供驱动电压，所述数据线113用于为所述子像素单元117提供数据电压，所述公共电极线115用于为所述子像素单元117提供公共电压，所述公共电压补偿电路130包括反馈信号处理器131、放大器133和公共电压调整电路135，所述反馈信号处理器131与所述公共电极线115连接，用于获取所述公共电压的反馈信号，并对所述反馈信号进行反相处理，所述放大器133连接于所述反馈信号处理器131与所述公共电压调整电路135之间，用于对反相后的反馈信号进行放大处理，得到补偿信号，所述公共电压调整电路135用于将所述补偿信号输入到所述公共电极线115上，以对所述公共电压进行补偿。
在本实施例中，所述反馈信号处理器131可以对获取到的公共电压的反馈信号进行处理，例如滤波、反相等处理。由于获取到的反馈信号在传输过程中可能会受到所述阵列基板110上其他信号的耦合作用及信号走线的阻抗等因素的影响，从而导致反相后得到的信号无法达到实际需要补偿的电压值，通过在所述反馈信号处理器131的后级电路中设置所述放大器133，以对反相后的所述公共电压进行放大处理，从而获得需要的补偿信号。可以理解，所述放大 器133的放大倍数可以根据实际需要改变。
可以理解，若所述公共电极线115上的公共电压存在波动，会导致所述子像素单元117上的像素电压不稳，进而引发串扰(crosstalk)、影像残留(image sticking)等缺陷。在本实施例中，通过获取所述公共电极线115上的所述公共电压的反馈信号，并对所述反馈信号进行反相和放大处理以获得对应的补偿信号，进而将所述补偿信号叠加到所述公共电压调整电路135输出的公共电压上，从而实现对所述公共电压的补偿，可以有效提升所述公共电压的稳定性。
所述液晶显示面板100还包括驱动电路板150，所述驱动电路板150设置于所述阵列基板110的一侧，并通过第一信号端口151及第二信号端口153与所述阵列基板110电性连接。所述公共电压补偿电路130可以设置于所述驱动电路板150上，以通过所述第一信号端口151获取所述公共电压的反馈信号，并通过所述第二信号端口153将所述补偿信号提供给所述公共电极线115。
可以理解，所述多条公共电极线115与所述多条扫描线111相互平行交替设置，并通过所述第二信号端口153共同连接至所述公共电压调整电路135的输出端，用于从所述公共电压调整电路135获取公共电压。由于所述公共电压从所述公共电压调整电路135传输至不同的公共电极线的传输距离不同，以及阵列基板上的其他信号的耦合作用，可能会导致位于阵列基板的不同位置的公共电极线上的公共电压之间存在差异，例如，远离所述驱动电路板150一侧的公共电极线上的公共电压的波动幅度可能会比靠近所述驱动电路板150一侧的公共电极线上的公共电压的波动幅度大，因此，可以设置不同的反馈信号采集点，从而获得不同的补偿信号，以实现不同的补偿效果。
在一种实施方式中，所述阵列基板110还包括第一反馈连接点112，所述第一反馈连接点112设置于位于所述阵列基板110的中间位置的公共电极线115的一端，所述反馈信号处理器131通过所述第一信号端口151与所述第一反馈连接点112连接，用于从所述第一反馈连接点112获取所述公共电压的反馈信号。
请参阅图2，假设所述公共电压为V0，从所述第一反馈连接端112获取的反馈信号为Va1，经反相处理之后的反馈信号为Vb1，最终得到的补偿信号为Vc1。其中，反馈信号Va1中包括了一个幅度为A1的正脉冲，即所述公共 电压中存在正干扰脉冲，且该正干扰脉冲的幅度可能比反馈信号Va1中包括的正脉冲的幅度A1大。通过将所述反馈信号Va1进行反相处理，得到的反馈信号Vb1包括了一个幅度为A1的负脉冲，进一步通过对反馈信号Vb1进行放大处理，得到补偿信号Vc1，通过调节所述放大器133的放大倍数k1，可使得该补偿信号Vc1中包括的负脉冲的幅度k1*A1刚好与所述公共电压中存在正干扰脉冲的幅度相同，最后将该补偿信号Vc1输入所述公共电极线115，使得所述公共电压中的正干扰脉冲刚好被所述补偿信号Vc1中的负脉冲抵消，从而实现对所述公共电压的补偿。
在一种实施方式中，所述阵列基板110还包括第二反馈连接点114，所述第二反馈连接点114设置于位于所述阵列基板110相对于所述驱动电路板150的一侧的公共电极线115的一端，所述反馈信号处理器131通过所述第一信号端口151与所述第二反馈连接点114连接，用于从所述第二反馈连接点114获取所述公共电压的反馈信号。
请参阅图3，假设所述公共电压为V0，从所述第二反馈连接点114获取的反馈信号为Va2，经反相处理之后的反馈信号为Vb2，最终得到的补偿信号为Vc2。其中，反馈信号Va2中包括了一个幅度为A2的正脉冲，即所述公共电压中存在正干扰脉冲，且该正干扰脉冲的幅度可能比反馈信号Va2中包括的正脉冲的幅度A2大。通过将所述反馈信号Va2进行反相处理，得到的反馈信号Vb2包括了一个幅度为A2的负脉冲，进一步通过对反馈信号Vb2进行放大处理，得到补偿信号Vc2，通过调节所述放大器133的放大倍数k2，可使得该补偿信号Vc2中包括的负脉冲的幅度k2*A2刚好与所述公共电压中存在正干扰脉冲的幅度相同，最后将该补偿信号Vc2输入所述公共电极线115，使得所述公共电压中的正干扰脉冲刚好被所述补偿信号Vc2中的负脉冲抵消，从而实现对所述公共电压的补偿。
可以理解，由于反馈信号Va1与反馈信号为Va2的采集位置不同，反馈信号Va1中的正脉冲的幅度A1与反馈信号Va2中的正脉冲的幅度A2也可能不同。在本实施例中，所述反馈信号Va2中的正脉冲的幅度A2大于所述反馈信号Va1中的正脉冲的幅度A1，因此，在对所的述公共电压进行补偿时，补偿信号Vc2相对于补偿信号Vc1的补偿幅度更大。
请参阅图4，所述子像素单元117包括主像素区域1171和次像素区域1173，所述主像素区域1171和所述次像素区域中1173各包括一个驱动晶体管TFT1、TFT1、一个存储电容Cst1、Cst2和一个液晶电容Clc1、Clc2，所述公共电极线115用于为所述存储电容Cst1、Cst2提供公共电压，所述次像素区域1173还包括泄放晶体管TFT3，用于将所述次像素区域1173的液晶电容Clc2上的电荷部分释放至所述公共电极线115上。在本实施例中，所述液晶显示面板100为8畴(domain)3TFT驱动架构，在每一个所述子像素单元117内，通过所述泄放晶体管TFT3将所述次像素区域1173的液晶电容Clc2上的电荷部分释放至所述公共电极线115上，从而可以得主像素区域1171和次像素区域1173内的像素电压和显示亮度不同，进而达成改善色偏的效果。
具体地，所述主像素区域1171包括第一晶体管TFT1、第一存储电容Cst1及第一液晶电容Clc1，所述第一晶体管TFT1的栅极与所述扫描线111连接，所述第一晶体管TFT1的漏极与所述数据线113连接，所述第一晶体管TFT1的源极连接所述第一存储电容Cst1和所述第一液晶电容Clc1的一端，所述第一存储电容Cst1的另一端连接所述公共电极线115，所述第一液晶电容Clc1的另一端用于连接公共电极119，其中，所述公共电极119位于所述液晶显示面板的彩膜(color filter，CF)基板上。
所述次像素区域1173包括第二晶体管TFT2、第二存储电容Cst2、第二液晶电容Clc2及第三晶体管TFT3，所述第二晶体管TFT2的栅极与所述扫描线111连接，所述第二晶体管TFT2的漏极与所述数据线113连接，所述第二晶体管TFT2的源极连接所述第二存储电容Cst2和所述第二液晶电容Clc2的一端，所述第二存储电容Cst2的另一端连接所述公共电极线115，所述第二液晶电容Clc2的另一端用于连接所述公共电极119，所述第三晶体管TFT3的栅极与所述扫描线111连接，所述第三晶体管TFT3的漏极与所述第二晶体管TFT2的源极连接，所述第三晶体管TFT3的源极连接所述公共电极线115。
可以理解，当所述扫描线111上的扫描信号有效时，所述第一晶体管TFT1、第二晶体管TFT2导通，所述数据线113上的数据电压被充入所述存储电容Cst1、Cst2和液晶电容Clc1、Clc2内，同时，所述第三晶体管TFT3的导通会使得所述次像素区域1173的液晶电容Clc2上存储的电荷中一部分被释放到所 述公共电极线115上，从而导致所述公共电压出现波动。在本实施例中，通过获取所述公共电极线115上的公共电压的反馈信号，并对所述反馈信号进行反相、放大处理，得到对应的补偿信号，进而将所述补偿信号输入到所述公共电极线115上，实现对所述公共电压的补偿，可以有效提升所述公共电压的稳定性，防止因所述公共电压的波动而导致液晶显示面板出现串扰和影像残留等问题，提升液晶显示面板的品质。
请参阅图5，在本发明一个实施例中，提供一种液晶显示面板的公共电压补偿方法，包括：
步骤501：获取液晶显示面板的公共电极线上的公共电压的反馈信号；
步骤502：对所述反馈信号进行反相和放大处理，得到对应的补偿信号；
步骤503：将所述补偿信号输入所述公共电极线，以通过所述补偿信号对所述公共电压进行补偿。
可以理解，所述公共电压补偿方法中各个步骤的具体实现还可以参照图1至图4所示实施例中的相关描述，此处不再赘述。
请参阅图6，在本发明一个实施例中，提供一种液晶显示面板的公共电压补偿装置600，包括：
电压获取单元601，用于获取液晶显示面板的公共电极线上的公共电压的反馈信号；
反相处理单元602，用于对所述反馈信号进行反相和放大处理，得到对应的补偿信号；
电压补偿单元603，用于将所述补偿信号输入所述公共电极线，以通过所述补偿信号对所述公共电压进行补偿。
可以理解，所述公共电压补偿装置600中各个单元的具体功能及其实现还可以参照图1至图4所示实施例中的相关描述，此处不再赘述。
所述液晶显示面板通过设置所述公共电压补偿电路，获取所述公共电极线上的公共电压的反馈信号，并对所述反馈信号进行反相、放大处理，得到对应的补偿信号，进而将所述补偿信号输入到所述公共电极线上，实现对所述公共电压的补偿，可以有效提升所述公共电压的稳定性，防止因所述公共电压的波动而导致液晶显示面板出现串扰和影像残留等问题，提升液晶显示面板的品 质。
可以理解，以上所揭露的仅为本发明的较佳实施例而已，当然不能以此来限定本发明的权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (10)

  1. 一种液晶显示面板，包括：阵列基板及公共电压补偿电路，所述阵列基板包括多条沿水平方向平行间隔设置的扫描线、多条沿竖直方向平行间隔设置的数据线、多条公共电极线和多个呈阵列设置的子像素单元，所述扫描线用于为所述子像素单元提供驱动电压，所述数据线用于为所述子像素单元提供数据电压，所述公共电极线用于为所述子像素单元提供公共电压，所述公共电压补偿电路包括反馈信号处理器、放大器和公共电压调整电路，所述反馈信号处理器与所述公共电极线连接，用于获取所述公共电压的反馈信号，并对所述反馈信号进行反相处理，所述放大器连接于所述反馈信号处理器与所述公共电压调整电路之间，用于对反相后的反馈信号进行放大处理得到补偿信号，所述公共电压调整电路用于将所述补偿信号输入到所述公共电极线上。
  2. 如权利要求1所述的液晶显示面板，其中，所述液晶显示面板还包括驱动电路板，所述驱动电路板设置于所述阵列基板的一侧，并通过第一信号端口及第二信号端口与所述阵列基板电性连接，所述公共电压补偿电路设置于所述驱动电路板上，以通过所述第一信号端口获取所述公共电压的反馈信号，并通过所述第二信号端口将所述补偿信号提供给所述公共电极线。
  3. 如权利要求2所述的液晶显示面板，其中，所述多条公共电极线与所述多条扫描线相互平行交替设置，并通过所述第二信号端口共同连接至所述公共电压调整电路的输出端，用于从所述公共电压调整电路获取公共电压。
  4. 如权利要求3所述的液晶显示面板，其中，所述阵列基板还包括第一反馈连接点，所述第一反馈连接点设置于位于所述阵列基板的中间位置的公共电极线的一端，所述反馈信号处理器通过所述第一信号端口与所述第一反馈连接点连接，用于从所述第一反馈连接点获取所述公共电压的反馈信号。
  5. 如权利要求3所述的液晶显示面板，其中，所述阵列基板还包括第二 反馈连接点，所述第二反馈连接点设置于位于所述阵列基板相对于所述驱动电路板的一侧的公共电极线的一端，所述反馈信号处理器通过所述第一信号端口与所述第二反馈连接点连接，用于从所述第二反馈连接点获取所述公共电压的反馈信号。
  6. 如权利要求1所述的液晶显示面板，其中，所述子像素单元包括主像素区域和次像素区域，所述主像素区域和所述次像素区域中各包括一个驱动晶体管、一个存储电容和一个液晶电容，所述次像素区域还包括泄放晶体管，用于将所述次像素区域的液晶电容上的电荷部分释放至所述公共电极线上。
  7. 如权利要求6所述的液晶显示面板，其中，所述主像素区域包括第一晶体管、第一存储电容及第一液晶电容，所述第一晶体管的栅极与所述扫描线连接，所述第一晶体管的漏极与所述数据线连接，所述第一晶体管的源极连接所述第一存储电容和所述第一液晶电容的一端，所述第一存储电容的另一端连接所述公共电极线，所述第一液晶电容的另一端用于连接公共电极。
  8. 如权利要求6所述的液晶显示面板，其中，所述次像素区域包括第二晶体管、第二存储电容、第二液晶电容及第三晶体管，所述第二晶体管的栅极与所述扫描线连接，所述第二晶体管的漏极与所述数据线连接，所述第二晶体管的源极连接所述第二存储电容和所述第二液晶电容的一端，所述第二存储电容的另一端连接所述公共电极线，所述第二液晶电容的另一端用于连接公共电极，所述第三晶体管的栅极与所述扫描线连接，所述第三晶体管的漏极与所述第二晶体管的源极连接，所述第三晶体管的源极连接所述公共电极线。
  9. 一种液晶显示面板的公共电压补偿方法，包括：
    获取液晶显示面板的公共电极线上的公共电压的反馈信号；
    对所述反馈信号进行反相和放大处理，得到对应的补偿信号；
    将所述补偿信号输入所述公共电极线，以通过所述补偿信号对所述公共电压进行补偿。
  10. 一种液晶显示面板的公共电压补偿装置，包括：
    电压获取单元，用于获取液晶显示面板的公共电极线上的公共电压的反馈信号；
    反相处理单元，用于对所述反馈信号进行反相和放大处理，得到对应的补偿信号；
    电压补偿单元，用于将所述补偿信号输入所述公共电极线，以通过所述补偿信号对所述公共电压进行补偿。
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