WO2016179847A1 - 一种液晶显示面板及装置 - Google Patents

一种液晶显示面板及装置 Download PDF

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Publication number
WO2016179847A1
WO2016179847A1 PCT/CN2015/079150 CN2015079150W WO2016179847A1 WO 2016179847 A1 WO2016179847 A1 WO 2016179847A1 CN 2015079150 W CN2015079150 W CN 2015079150W WO 2016179847 A1 WO2016179847 A1 WO 2016179847A1
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WIPO (PCT)
Prior art keywords
voltage
input
common electrode
resistor
liquid crystal
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PCT/CN2015/079150
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English (en)
French (fr)
Inventor
徐枫程
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/772,390 priority Critical patent/US10067365B2/en
Publication of WO2016179847A1 publication Critical patent/WO2016179847A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • 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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display panel and device.
  • the liquid crystal display panel generally includes two upper and lower substrates disposed oppositely, since the data line on the lower substrate and the common electrode on the upper substrate have parasitic capacitance, when the data line voltage fluctuates, the parasitic capacitance coupling affects the voltage on the common electrode. (VCOM) due to the presence of a RC delay (RC) Delay), therefore, the voltage on the common electrode cannot be restored to the value set by the reference voltage source in a short time, and the voltage of the common electrode is restored to the set potential time longer than the writing time of one data signal; Crosstalk phenomenon.
  • VCOM voltage on the common electrode cannot be restored to the value set by the reference voltage source in a short time, and the voltage of the common electrode is restored to the set potential time longer than the writing time of one data signal; Crosstalk phenomenon.
  • VCOM common electrode
  • the present invention constructs a liquid crystal display panel including: a first substrate including a plurality of data lines and a plurality of scan lines, and a plurality of pixels defined by the data lines and the scan lines Unit;
  • the second substrate disposed opposite to the first substrate, the second substrate including a common electrode
  • a drive circuit comprising:
  • a power module having a first input for inputting an initial voltage to the common electrode
  • a feedback unit having a second input, a first output, and a third input for inputting a DC voltage; wherein the second input is for inputting an actual voltage on the common electrode; the first output The end is configured to input a feedback voltage to the first input end;
  • the feedback unit is configured to reduce a voltage of the first output end when an actual voltage of the common electrode is greater than the preset voltage; and to the second input according to an input voltage of the third input end
  • the input voltage of the terminal is processed to output the feedback voltage through the first output terminal to make the actual voltage on the common electrode equal to a preset voltage;
  • the first input is connected to the common electrode
  • the first output is connected to the first input
  • the second input is also connected to the common electrode.
  • the feedback unit is further configured to increase a voltage of the first output terminal when an actual voltage of the common electrode is smaller than the preset voltage.
  • the feedback unit includes: a first resistor, a second resistor, a third resistor, and a triode; the triode has an emitter, a base, and a collector;
  • the second input end is connected to the base of the triode through the first resistor, the emitter of the triode is grounded; the third input end is connected to the collector of the triode through the second resistor; a connection point is disposed between the second resistor and the collector, one end of the third resistor is connected to the connection point, and the other end of the third resistor is connected to the second input end and the first Between a resistors; the first output is connected to the connection point.
  • the first substrate is an array substrate
  • the second substrate is a color film substrate
  • the present invention constructs a liquid crystal display panel, which includes:
  • a first substrate comprising a plurality of data lines and a plurality of scan lines, and a plurality of pixel units defined by the data lines and the scan lines;
  • the second substrate disposed opposite to the first substrate, the second substrate including a common electrode
  • a drive circuit comprising:
  • a power module for inputting an initial voltage to the common electrode
  • a feedback unit configured to adjust an initial voltage of the power module according to an actual voltage on the common electrode, so that an actual voltage on the common electrode is equal to a preset voltage.
  • the power module has a first input terminal, and the first input terminal is configured to input an initial voltage to the common electrode;
  • the feedback unit has a second input, and a first output; wherein the second input is for inputting an actual voltage on the common electrode; the first output is for the first input Input feedback voltage;
  • the first input is connected to the common electrode
  • the first output is connected to the first input
  • the second input is also connected to the common electrode.
  • the feedback unit is configured to reduce a voltage of the first output terminal when an actual voltage of the common electrode is greater than the preset voltage; and at the common electrode When the actual voltage is smaller than the preset voltage, the voltage of the first output terminal is increased.
  • the feedback unit further has a third input terminal for inputting a DC voltage
  • the feedback unit is further configured to: according to an input voltage of the third input terminal, to the second The input voltage at the input is processed such that the first output outputs the feedback voltage.
  • the feedback unit includes: a first resistor, a second resistor, a third resistor, and a triode; the triode has an emitter, a base, and a collector;
  • the second input end is connected to the base of the triode through the first resistor, the emitter of the triode is grounded; the third input end is connected to the collector of the triode through the second resistor; a connection point is disposed between the second resistor and the collector, one end of the third resistor is connected to the connection point, and the other end of the third resistor is connected to the second input end and the first Between a resistors; the first output is connected to the connection point.
  • the first substrate is an array substrate
  • the second substrate is a color film substrate
  • the invention also provides a liquid crystal display device comprising:
  • a liquid crystal display panel comprising:
  • a first substrate comprising a plurality of data lines and a plurality of scan lines, and a plurality of pixel units defined by the data lines and the scan lines;
  • the second substrate disposed opposite to the first substrate, the second substrate including a common electrode
  • a drive circuit comprising:
  • a power module for inputting an initial voltage to the common electrode
  • a feedback unit configured to adjust an initial voltage of the power module according to an actual voltage on the common electrode, so that an actual voltage on the common electrode is equal to a preset voltage.
  • the power module has a first input terminal for inputting an initial voltage to the common electrode
  • the feedback unit has a second input, and a first output; wherein the second input is for inputting an actual voltage on the common electrode; the first output is for the first input Input feedback voltage;
  • the first input is connected to the common electrode
  • the first output is connected to the first input
  • the second input is also connected to the common electrode.
  • the feedback unit is configured to reduce a voltage of the first output terminal when an actual voltage of the common electrode is greater than the preset voltage; and an actual voltage at the common electrode The voltage of the first output terminal is increased when the preset voltage is smaller.
  • the feedback unit further has a third input terminal for inputting a DC voltage
  • the feedback unit is further configured to: according to an input voltage of the third input terminal, to the second input end The input voltage is processed such that the first output outputs the feedback voltage.
  • the feedback unit includes: a first resistor, a second resistor, a third resistor, and a triode; the triode has an emitter, a base, and a collector;
  • the second input end is connected to the base of the triode through the first resistor, the emitter of the triode is grounded; the third input end is connected to the collector of the triode through the second resistor; a connection point is disposed between the second resistor and the collector, one end of the third resistor is connected to the connection point, and the other end of the third resistor is connected to the second input end and the first Between a resistors; the first output is connected to the connection point.
  • the liquid crystal display panel and device of the present invention can maintain the stable value by adjusting the voltage on the common electrode in real time, thereby eliminating the crosstalk phenomenon and further improving the display effect.
  • FIG. 1 is a schematic diagram of gray scale testing of a liquid crystal display panel of the prior art
  • FIG. 2 is a schematic structural view of a driving circuit of the present invention
  • FIG. 3 is a circuit diagram of a feedback unit in a drive circuit of the present invention.
  • FIG. 1 is a schematic diagram of gray scale testing of a liquid crystal display panel of the prior art
  • the data line 11 first inputs gray gray scale data, then inputs black gray scale data, and finally inputs gray gray scale data, at the x1 position.
  • the gray scale data is converted from gray gray scale data to black gray scale data, since the data voltages on the plurality of data lines become smaller at the same time, the voltage on the common electrode is affected by the capacitive coupling effect of the data lines, and becomes small.
  • the VCOM voltage has not recovered to the preset voltage, further increasing the voltage difference between the pixel electrode and the common electrode; when the gray scale data is converted from black gray scale data to gray gray scale data at the x2 position As the data voltage on the data line becomes larger, the voltage on the corresponding common electrode becomes larger.
  • the VCOM voltage has not recovered to the preset voltage, further changing the voltage difference between the pixel electrode and the common electrode. .
  • the black portion is darker than the gray level of the input
  • the gray portion is also darker than the gray level of the input, so crosstalk occurs during viewing. phenomenon.
  • FIG. 2 is a schematic structural diagram of a driving circuit of the present invention
  • the liquid crystal display panel 20 of the present invention comprises: a first substrate, a second substrate, and a liquid crystal layer, wherein the first substrate can be an array substrate, the second substrate can be a color film substrate, and the first substrate comprises a plurality of data a line and a plurality of scan lines, and a plurality of pixel units defined by the data lines and the scan lines, the first substrate may further include a pixel electrode; the second substrate is disposed opposite to the first substrate, The second substrate includes a common electrode; the liquid crystal display panel 20 further includes a driving circuit;
  • the driving circuit includes: a power module 21 and a feedback unit 22; the power module 21 is connected to a common electrode on the liquid crystal display panel 20, and provides an initial voltage to the common electrode; and the feedback unit 22 is also connected
  • the common electrode is configured to acquire an actual voltage on the common electrode, and adjust an initial voltage of the power module 21 according to an actual voltage on the common electrode, so that an actual voltage on the common electrode is equal to Preset voltage.
  • the power module 21 has a first input terminal 23; the feedback unit 22 has a second input terminal 24, and a first output terminal 25; the first input terminal 23 is connected to the common electrode, and the second input terminal 24 is also connected to the common electrode.
  • the first output end 25 is connected to the first input end 23 of the power module 21 .
  • the power module 21 inputs an initial voltage to the common electrode through a first input terminal 23; the second input terminal 24 inputs an actual voltage on the common electrode;
  • the first output terminal 25 inputs a feedback voltage to the first input terminal 23.
  • the circuit structure of the feedback unit is as shown in FIG. 3, the feedback unit 22 further has a third input terminal 26, and the feedback unit 22 further includes: a first resistor R1, a second resistor R2, and a third resistor. R3, a transistor T1; the transistor T1 has an emitter, a base, and a collector;
  • the second input terminal 24 of the feedback unit 22 is connected to the base of the transistor T1 through the first resistor R1, the emitter of the transistor T1 is grounded; the third input terminal 26 Connected to the collector of the transistor through the second resistor R2; a connection point A is disposed between the second resistor R2 and the collector, and one end of the third resistor R3 is connected to the connection point A, There is another connection point B between the second input terminal 24 and the first resistor R1, and the other end of the third resistor R3 is connected between the first input terminal and the first resistor. Point B; the first output 25 is connected to the connection point A.
  • the third input terminal 26 is connected to a DC power source, and a DC voltage is input to the third input terminal 26 through the DC power source, and the voltage value of the DC voltage is, for example, 16V.
  • the direction of the arrow in FIG. 3 gives the direction of flow of the current.
  • the voltage of the second input terminal 24 is, for example, Vi, since the second input terminal 24 inputs a common
  • the actual voltage of the electrode that is, the actual voltage corresponding to the common electrode increases, the current ib of the base of the transistor T1 increases, and the current ic of the collector of the transistor T1 increases, resulting in an increase in the voltage of R2.
  • the voltage at point A decreases, the voltage of the first output terminal 25 decreases, and the first output terminal 25 is connected to the first input terminal 23 of the power module 21, so that the output of the power module 21 is output to the common electrode.
  • the voltage becomes smaller.
  • the actual voltage on the common electrode is further stabilized by the feedback action of the first output terminal 25.
  • the second input terminal 24 inputs the actual voltage of the common electrode, that is, the actual voltage corresponding to the common electrode decreases, the current ib of the base of the transistor T1 decreases.
  • the current ib of the base of the transistor T1 decreases.
  • the first input terminal 23 of the power module 21 causes the voltage of the output of the power module to the common electrode to become large.
  • the actual voltage on the common electrode is further stabilized by the feedback action of the first output terminal 25.
  • the liquid crystal display panel of the invention monitors the voltage on the common electrode in real time through the feedback unit, and adjusts the voltage on the common electrode to feed back to the power module, so that the voltage of the common electrode maintains a stable value, thereby avoiding the capacitance of the data line.
  • the effect of the coupling effect on the voltage of the common electrode eliminates the crosstalk phenomenon and further improves the display effect.
  • the present invention further provides a liquid crystal display device including a backlight module and a liquid crystal display panel.
  • the liquid crystal display panel 20 of the present invention includes: a first substrate, a second substrate, and a liquid crystal layer, wherein the first substrate includes a plurality of data lines And a plurality of scan lines, and a plurality of pixel units defined by the data lines and the scan lines, the first substrate may further include a pixel electrode; the second substrate is disposed opposite to the first substrate, The second substrate includes a common electrode; the liquid crystal display panel 20 further includes a driving circuit;
  • the driving circuit includes: a power module 21 and a feedback unit 22; the power module 21 is connected to a common electrode on the liquid crystal display panel 20, and provides an initial voltage to the common electrode; and the feedback unit 22 is also connected
  • the common electrode is configured to acquire an actual voltage on the common electrode, and adjust an initial voltage of the power module 21 according to an actual voltage on the common electrode, so that an actual voltage on the common electrode is equal to Preset voltage.
  • the power module 21 has a first input terminal 23; the feedback unit 22 has a second input terminal 24, and a first output terminal 25; the first input terminal 23 is connected to the common electrode, and the second input terminal 24 is also connected to the common electrode.
  • the first output end 25 is connected to the first input end 23 of the power module 21 .
  • the power module 21 inputs an initial voltage to the common electrode through a first input terminal 23; the second input terminal 24 inputs an actual voltage on the common electrode;
  • the first output terminal 25 inputs a feedback voltage to the first input terminal 23.
  • the circuit structure of the feedback unit is as shown in FIG. 3, the feedback unit 22 further has a third input terminal 26, and the feedback unit 22 further includes: a first resistor R1, a second resistor R2, and a third resistor. R3, a transistor T1; the transistor T1 has an emitter, a base, and a collector;
  • the second input terminal 24 of the feedback unit 22 is connected to the base of the transistor T1 through the first resistor R1, the emitter of the transistor T1 is grounded; the third input terminal 26 Connected to the collector of the transistor through the second resistor R2; a connection point A is disposed between the second resistor R2 and the collector, and one end of the third resistor R3 is connected to the connection point A, There is another connection point B between the second input terminal 24 and the first resistor R1, and the other end of the third resistor R3 is connected between the first input terminal and the first resistor. Point B; the first output 25 is connected to the connection point A.
  • the third input terminal 26 is connected to a DC power source, and a DC voltage is input to the third input terminal 26 through the DC power source, and the voltage value of the DC voltage is, for example, 16V.
  • the direction of the arrow in FIG. 3 gives the direction of flow of the current.
  • the voltage of the second input terminal 24 is, for example, Vi, since the second input terminal 24 inputs a common
  • the actual voltage of the electrode that is, the actual voltage corresponding to the common electrode increases, the current ib of the base of the transistor T1 increases, and the current ic of the collector of the transistor T1 increases, resulting in an increase in the voltage of R2.
  • the voltage at point A decreases, the voltage of the first output terminal 25 decreases, and the first output terminal 25 is connected to the first input terminal 23 of the power module 21, so that the output of the power module 21 is output to the common electrode.
  • the voltage becomes smaller.
  • the actual voltage on the common electrode is further stabilized by the feedback action of the first output terminal 25.
  • the second input terminal 24 inputs the actual voltage of the common electrode, that is, the actual voltage corresponding to the common electrode decreases, the current ib of the base of the transistor T1 decreases.
  • the current ib of the base of the transistor T1 decreases.
  • the first input terminal 23 of the power module 21 causes the voltage of the output of the power module 21 to the common electrode to become large.
  • the actual voltage on the common electrode is further stabilized by the feedback action of the first output terminal 25.
  • the voltage on the common electrode is monitored in real time by the feedback unit, and the voltage on the common electrode is adjusted and fed back to the power supply module, so that the voltage of the common electrode is maintained at a stable value, thereby avoiding the capacitance of the data line.
  • the effect of the coupling effect on the voltage of the common electrode eliminates the crosstalk phenomenon and further improves the display effect.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶显示面板（20）及装置，所述液晶显示面板（20）包括驱动电路，其中驱动电路包括：电源模块（21），用于向所述公共电极输入初始电压；以及反馈单元（22），用于根据所述公共电极上的实际电压，对所述电源模块（21）的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。

Description

一种液晶显示面板及装置 技术领域
本发明涉及显示器技术领域，特别是涉及一种液晶显示面板及装置。
 背景技术
由于通常液晶显示面板包括相对设置的上下两个基板，由于下基板上的数据线与上基板上的公共电极存在寄生电容，当数据线电压变动时，寄生电容耦合从而影响了公共电极上的电压（VCOM），由于存在阻容延迟（RC delay），因此无法在短时间内使公共电极上的电压恢复到参考电压源所设定的值，公共电极的电压恢复到设定电位时间大于一条数据信号的写入时间；便可能产生显示不良的串扰现象。
传统稳定公共电极（VCOM）电压的方法，主要是增大VCOM电压源的驱动能力，从而保持VCOM电压稳定；但是这种稳压方式，不仅会增加VCOM电压源芯片的成本，而且发现VCOM的电压波形仍存在噪声。
因此，有必要提供一种液晶显示面板及装置，以解决现有技术所存在的问题。
 技术问题
本发明的目的在于提供一种液晶显示面板及装置，以解决现有技术的稳定公共电极电压的方法，成本比较高，且效果不明显的技术问题。
 技术解决方案
为解决上述技术问题，本发明构造了一种液晶显示面板，其包括：第一基板，包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元；以及
第二基板，与所述第一基板相对设置，所述第二基板包括公共电极；以及
驱动电路，其包括：
电源模块，具有第一输入端，所述第一输入端用于向所述公共电极输入初始电压；以及
反馈单元，具有第二输入端，第一输出端、以及用于输入直流电压的第三输入端；其中所述第二输入端用于输入所述公共电极上的实际电压；所述第一输出端用于向所述第一输入端输入反馈电压；
其中所述反馈单元用于在所述公共电极的实际电压比所述预设电压大时，降低所述第一输出端的电压；并根据所述第三输入端的输入电压，对所述第二输入端的输入电压进行处理，以通过所述第一输出端输出所述反馈电压使所述公共电极上的实际电压等于预设电压；
所述第一输入端连接所述公共电极，所述第一输出端连接所述第一输入端；所述第二输入端也连接所述公共电极。
在本发明的所述液晶显示面板中，所述反馈单元还用于在所述公共电极的实际电压比所述预设电压小时，增大所述第一输出端的电压。
在本发明的所述液晶显示面板中，所述反馈单元包括：第一电阻、第二电阻、第三电阻、三极管；所述三极管具有发射极、基极、集电极；
所述第二输入端通过所述第一电阻连接至所述三极管的基极，所述三极管的发射极接地；所述第三输入端通过所述第二电阻连接至所述三极管的集电极；所述第二电阻和所述集电极之间设置有一连接点，所述第三电阻的一端连接所述连接点，所述第三电阻的另一端连接在所述第二输入端和所述第一电阻之间；所述第一输出端与所述连接点连接。
在本发明的所述液晶显示面板中，所述第一基板为阵列基板，所述第二基板为彩膜基板。
为解决上述技术问题，本发明构造了一种液晶显示面板，其包括：
第一基板，包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元；以及
第二基板，与所述第一基板相对设置，所述第二基板包括公共电极；以及
驱动电路，其包括：
电源模块，用于向所述公共电极输入初始电压；以及
反馈单元，用于根据所述公共电极上的实际电压，对所述电源模块的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。
在本发明的所述液晶显示面板中，所述电源模块具有第一输入端，所述第一输入端用于向所述公共电极输入初始电压；
所述反馈单元具有第二输入端，以及第一输出端；其中所述第二输入端用于输入所述公共电极上的实际电压；所述第一输出端用于向所述第一输入端输入反馈电压；
所述第一输入端连接所述公共电极，所述第一输出端连接所述第一输入端；所述第二输入端也连接所述公共电极。
在本发明的所述液晶显示面板中，所述反馈单元用于在所述公共电极的实际电压比所述预设电压大时，降低所述第一输出端的电压；以及在所述公共电极的实际电压比所述预设电压小时，增大所述第一输出端的电压。
在本发明的所述液晶显示面板中，所述反馈单元还具有用于输入直流电压的第三输入端，所述反馈单元还用于根据所述第三输入端的输入电压，对所述第二输入端的输入电压进行处理，以使所述第一输出端输出所述反馈电压。
在本发明的所述液晶显示面板中，所述反馈单元包括：第一电阻、第二电阻、第三电阻、三极管；所述三极管具有发射极、基极、集电极；
所述第二输入端通过所述第一电阻连接至所述三极管的基极，所述三极管的发射极接地；所述第三输入端通过所述第二电阻连接至所述三极管的集电极；所述第二电阻和所述集电极之间设置有一连接点，所述第三电阻的一端连接所述连接点，所述第三电阻的另一端连接在所述第二输入端和所述第一电阻之间；所述第一输出端与所述连接点连接。
在本发明的所述液晶显示面板中，所述第一基板为阵列基板，所述第二基板为彩膜基板。
本发明还提供一种液晶显示装置，其包括：
背光模块，以及
液晶显示面板，其包括：
第一基板，包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元；以及
第二基板，与所述第一基板相对设置，所述第二基板包括公共电极；以及
驱动电路，其包括：
电源模块，用于向所述公共电极输入初始电压；以及
反馈单元，用于根据所述公共电极上的实际电压，对所述电源模块的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。
在本发明的液晶显示装置中，所述电源模块具有第一输入端，所述第一输入端用于向所述公共电极输入初始电压；
所述反馈单元具有第二输入端，以及第一输出端；其中所述第二输入端用于输入所述公共电极上的实际电压；所述第一输出端用于向所述第一输入端输入反馈电压；
所述第一输入端连接所述公共电极，所述第一输出端连接所述第一输入端；所述第二输入端也连接所述公共电极。
在本发明的液晶显示装置中，所述反馈单元用于在所述公共电极的实际电压比所述预设电压大时，降低所述第一输出端的电压；以及在所述公共电极的实际电压比所述预设电压小时，增大所述第一输出端的电压。
在本发明的液晶显示装置中，所述反馈单元还具有用于输入直流电压的第三输入端，所述反馈单元还用于根据所述第三输入端的输入电压，对所述第二输入端的输入电压进行处理，以使所述第一输出端输出所述反馈电压。
在本发明的液晶显示装置中，所述反馈单元包括：第一电阻、第二电阻、第三电阻、三极管；所述三极管具有发射极、基极、集电极；
所述第二输入端通过所述第一电阻连接至所述三极管的基极，所述三极管的发射极接地；所述第三输入端通过所述第二电阻连接至所述三极管的集电极；所述第二电阻和所述集电极之间设置有一连接点，所述第三电阻的一端连接所述连接点，所述第三电阻的另一端连接在所述第二输入端和所述第一电阻之间；所述第一输出端与所述连接点连接。
 有益效果
本发明的液晶显示面板及装置，通过对公共电极上的电压进行实时调节，使其保持稳定值，从而消除串扰现象，进一步提高了显示效果。
 附图说明
图1为现有技术的液晶显示面板的灰阶测试示意图；
图2为本发明的驱动电路的结构示意图；
图3为本发明的驱动电路中的反馈单元的电路图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是以相同标号表示。
请参照图1，图1为现有技术的液晶显示面板的灰阶测试示意图；
如图1所示，现有技术的显示面板在输入黑灰测试灰阶图时，其中数据线11先输入灰色灰阶数据、再输入黑色灰阶数据、最后输入灰色灰阶数据，在x1位置时，灰阶数据由灰色灰阶数据转换为黑色灰阶数据，由于多条数据线上的数据电压同时变小，使得公共电极上的电压受到这些数据线的电容耦合效应的影响而变小，在扫描线关闭时，VCOM电压尚未恢复到预设电压，进一步使得像素电极和公共电极之间的压差增大；在x2位置时，灰阶数据由黑色灰阶数据转换为灰色灰阶数据时，由于数据线上的数据电压变大，使得对应的公共电极上的电压变大，在扫描线关闭时，VCOM电压尚未恢复到预设电压，进一步使得像素电极和公共电极之间的压差变化。以数据线11上的像素而言，黑色部分会比输入的灰阶黑一些，而以数据线12上的像素而言，灰色部分也比输入的灰阶颜色深一些，因此在观看时出现串扰现象。
请参照图2，图2为本发明的驱动电路的结构示意图；
本发明的液晶显示面板20包括：第一基板、第二基板、液晶层，所述第一基板可为阵列基板、所述第二基板可为彩膜基板，所述第一基板包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元，所述第一基板还可包括像素电极；所述第二基板与所述第一基板相对设置，所述第二基板包括公共电极；所述液晶显示面板20还包括驱动电路；
其中所述驱动电路包括：电源模块21和反馈单元22；所述电源模块21连接所述液晶显示面板20上的公共电极，并向所述公共电极提供初始电压；以及所述反馈单元22也连接所述公共电极，以获取所述公共电极上的实际电压，并根据所述公共电极上的实际电压，对所述电源模块21的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。
所述电源模块21具有第一输入端23；所述反馈单元22具有第二输入端24，以及第一输出端25；所述第一输入端23连接所述公共电极，所述第二输入端24也连接所述公共电极。所述第一输出端25连接所述电源模块21的第一输入端23。
所述电源模块21通过第一输入端23向所述公共电极输入初始电压；所述第二输入端24输入有所述公共电极上的实际电压；
所述第一输出端25向所述第一输入端23输入一反馈电压。
优选地，所述反馈单元的电路结构譬如图3所示，所述反馈单元22还具有第三输入端26，所述反馈单元22还包括：第一电阻R1、第二电阻R2、第三电阻R3、三极管T1；所述三极管T1具有发射极、基极、集电极；
结合图2，所述反馈单元22的所述第二输入端24通过所述第一电阻R1连接至所述三极管T1的基极，所述三极管T1的发射极接地；所述第三输入端26通过所述第二电阻R2连接至所述三极管的集电极；所述第二电阻R2和所述集电极之间设置有一连接点A，所述第三电阻R3的一端连接所述连接点A，所述第二输入端24和所述第一电阻R1之间具有另一连接点B，所述第三电阻R3的另一端连接在所述第一输入端和所述第一电阻之间的连接点B上；所述第一输出端25与所述连接点A连接。所述第三输入端26连接直流电源，通过所述直流电源向第三输入端26输入直流电压，所述直流电压的电压值譬如为16V。
图3中的箭头方向给出电流的流动方向，在所述公共电极的实际电压变大时，所述第二输入端24的电压譬如为Vi，由于所述第二输入端24输入的是公共电极的实际电压，即相当于公共电极的实际电压增大，所述三极管T1的基极的电流ib增大，同时使得所述三极管T1的集电极的电流ic增大，导致R2的电压增大，A点的电压减小，第一输出端25的电压减小，由于第一输出端25连接所述电源模块21的第一输入端23，从而使得所述电源模块21的输出到公共电极上的电压变小。通过第一输出端25的反馈作用，进一步使所述公共电极上的实际电压更加稳定。
在所述公共电极的实际电压变小时，由于所述第二输入端24输入的是公共电极的实际电压，即相当于公共电极的实际电压减小，所述三极管T1的基极的电流ib减小，同时使得所述三极管T1的集电极的电流ic减小，导致R2的电压减小，A点的电压增大，第一输出端25的电压增大，由于第一输出端25连接所述电源模块21的第一输入端23，从而使得所述电源模块的输出到公共电极上的电压变大。通过第一输出端25的反馈作用，进一步使所述公共电极上的实际电压更加稳定。
本发明的液晶显示面板，通过反馈单元对公共电极上的电压进行实时监控，并对公共电极上的电压进行调节后反馈给电源模块，使公共电极的电压保持稳定值，避免了数据线的电容耦合效应对公共电极电压的影响，从而消除了串扰现象，进一步提高了显示效果。
本发明还提供一种液晶显示装置，其包括背光模块，以及液晶显示面板；本发明的液晶显示面板20包括：第一基板、第二基板、液晶层，所述第一基板包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元，所述第一基板还可包括像素电极；所述第二基板与所述第一基板相对设置，所述第二基板包括公共电极；所述液晶显示面板20还包括驱动电路；
其中所述驱动电路包括：电源模块21和反馈单元22；所述电源模块21连接所述液晶显示面板20上的公共电极，并向所述公共电极提供初始电压；以及所述反馈单元22也连接所述公共电极，以获取所述公共电极上的实际电压，并根据所述公共电极上的实际电压，对所述电源模块21的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。
所述电源模块21具有第一输入端23；所述反馈单元22具有第二输入端24，以及第一输出端25；所述第一输入端23连接所述公共电极，所述第二输入端24也连接所述公共电极。所述第一输出端25连接所述电源模块21的第一输入端23。
所述电源模块21通过第一输入端23向所述公共电极输入初始电压；所述第二输入端24输入有所述公共电极上的实际电压；
所述第一输出端25向所述第一输入端23输入一反馈电压。
优选地，所述反馈单元的电路结构譬如图3所示，所述反馈单元22还具有第三输入端26，所述反馈单元22还包括：第一电阻R1、第二电阻R2、第三电阻R3、三极管T1；所述三极管T1具有发射极、基极、集电极；
结合图2，所述反馈单元22的所述第二输入端24通过所述第一电阻R1连接至所述三极管T1的基极，所述三极管T1的发射极接地；所述第三输入端26通过所述第二电阻R2连接至所述三极管的集电极；所述第二电阻R2和所述集电极之间设置有一连接点A，所述第三电阻R3的一端连接所述连接点A，所述第二输入端24和所述第一电阻R1之间具有另一连接点B，所述第三电阻R3的另一端连接在所述第一输入端和所述第一电阻之间的连接点B上；所述第一输出端25与所述连接点A连接。所述第三输入端26连接直流电源，通过所述直流电源向第三输入端26输入直流电压，所述直流电压的电压值譬如为16V。
图3中的箭头方向给出电流的流动方向，在所述公共电极的实际电压变大时，所述第二输入端24的电压譬如为Vi，由于所述第二输入端24输入的是公共电极的实际电压，即相当于公共电极的实际电压增大，所述三极管T1的基极的电流ib增大，同时使得所述三极管T1的集电极的电流ic增大，导致R2的电压增大，A点的电压减小，第一输出端25的电压减小，由于第一输出端25连接所述电源模块21的第一输入端23，从而使得所述电源模块21的输出到公共电极上的电压变小。通过第一输出端25的反馈作用，进一步使所述公共电极上的实际电压更加稳定。
在所述公共电极的实际电压变小时，由于所述第二输入端24输入的是公共电极的实际电压，即相当于公共电极的实际电压减小，所述三极管T1的基极的电流ib减小，同时使得所述三极管T1的集电极的电流ic减小，导致R2的电压减小，A点的电压增大，第一输出端25的电压增大，由于第一输出端25连接所述电源模块21的第一输入端23，从而使得所述电源模块21的输出到公共电极上的电压变大。通过第一输出端25的反馈作用，进一步使所述公共电极上的实际电压更加稳定。
本发明的液晶显示装置，通过反馈单元对公共电极上的电压进行实时监控，并对公共电极上的电压进行调节后反馈给电源模块，使公共电极的电压保持稳定值，避免了数据线的电容耦合效应对公共电极电压的影响，从而消除了串扰现象，进一步提高了显示效果。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (15)

  1. 一种液晶显示面板，其包括：
    第一基板，包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元；以及
    第二基板，与所述第一基板相对设置，所述第二基板包括公共电极；以及
    驱动电路，其包括：
    电源模块，具有第一输入端，所述第一输入端用于向所述公共电极输入初始电压；以及
    反馈单元，具有第二输入端，第一输出端、以及用于输入直流电压的第三输入端；其中所述第二输入端用于输入所述公共电极上的实际电压；所述第一输出端用于向所述第一输入端输入反馈电压；
    其中所述反馈单元用于在所述公共电极的实际电压比所述预设电压大时，降低所述第一输出端的电压；并根据所述第三输入端的输入电压，对所述第二输入端的输入电压进行处理，以通过所述第一输出端输出所述反馈电压使所述公共电极上的实际电压等于预设电压；
    所述第一输入端连接所述公共电极，所述第一输出端连接所述第一输入端；所述第二输入端也连接所述公共电极。
  2. 根据权利要求1所述的液晶显示面板，其中
    所述反馈单元还用于在所述公共电极的实际电压比所述预设电压小时，增大所述第一输出端的电压。
  3. 根据权利要求1所述的液晶显示面板，其中
    所述反馈单元包括：第一电阻、第二电阻、第三电阻、三极管；所述三极管具有发射极、基极、集电极；
    所述第二输入端通过所述第一电阻连接至所述三极管的基极，所述三极管的发射极接地；所述第三输入端通过所述第二电阻连接至所述三极管的集电极；所述第二电阻和所述集电极之间设置有一连接点，所述第三电阻的一端连接所述连接点，所述第三电阻的另一端连接在所述第二输入端和所述第一电阻之间；所述第一输出端与所述连接点连接。
  4. 根据权利要求1所述的液晶显示面板，其中
    所述第一基板为阵列基板，所述第二基板为彩膜基板。
  5. 一种液晶显示面板，其包括：
    第一基板，包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元；以及
    第二基板，与所述第一基板相对设置，所述第二基板包括公共电极；以及
    驱动电路，其包括：
    电源模块，用于向所述公共电极输入初始电压；以及
    反馈单元，用于根据所述公共电极上的实际电压，对所述电源模块的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。
  6. 根据权利要求5所述的液晶显示面板，其中
    所述电源模块具有第一输入端，所述第一输入端用于向所述公共电极输入初始电压；
    所述反馈单元具有第二输入端，以及第一输出端；其中所述第二输入端用于输入所述公共电极上的实际电压；所述第一输出端用于向所述第一输入端输入反馈电压；
    所述第一输入端连接所述公共电极，所述第一输出端连接所述第一输入端；所述第二输入端也连接所述公共电极。
  7. 根据权利要求6所述的液晶显示面板，其中
    所述反馈单元用于在所述公共电极的实际电压比所述预设电压大时，降低所述第一输出端的电压；以及在所述公共电极的实际电压比所述预设电压小时，增大所述第一输出端的电压。
  8. 根据权利要求6所述的液晶显示面板，其中
    所述反馈单元还具有用于输入直流电压的第三输入端，所述反馈单元还用于根据所述第三输入端的输入电压，对所述第二输入端的输入电压进行处理，以使所述第一输出端输出所述反馈电压。
  9. 根据权利要求8所述的液晶显示面板，其中
    所述反馈单元包括：第一电阻、第二电阻、第三电阻、三极管；所述三极管具有发射极、基极、集电极；
    所述第二输入端通过所述第一电阻连接至所述三极管的基极，所述三极管的发射极接地；所述第三输入端通过所述第二电阻连接至所述三极管的集电极；所述第二电阻和所述集电极之间设置有一连接点，所述第三电阻的一端连接所述连接点，所述第三电阻的另一端连接在所述第二输入端和所述第一电阻之间；所述第一输出端与所述连接点连接。
  10. 根据权利要求5所述的液晶显示面板，其中
    所述第一基板为阵列基板，所述第二基板为彩膜基板。
  11. 一种液晶显示装置，其包括：
    背光模块，以及
    液晶显示面板，其包括：
    第一基板，包括多条数据线和多条扫描线，以及由所述数据线和所述扫描线限定的多个像素单元；以及
    第二基板，与所述第一基板相对设置，所述第二基板包括公共电极；以及
    驱动电路，其包括：
    电源模块，用于向所述公共电极输入初始电压；以及
    反馈单元，用于根据所述公共电极上的实际电压，对所述电源模块的初始电压进行调节，以使所述公共电极上的实际电压等于预设电压。
  12. 根据权利要求11所述的液晶显示装置，其中
    所述电源模块具有第一输入端，所述第一输入端用于向所述公共电极输入初始电压；
    所述反馈单元具有第二输入端，以及第一输出端；其中所述第二输入端用于输入所述公共电极上的实际电压；所述第一输出端用于向所述第一输入端输入反馈电压；
    所述第一输入端连接所述公共电极，所述第一输出端连接所述第一输入端；所述第二输入端也连接所述公共电极。
  13. 根据权利要求12所述的液晶显示装置，其中
    所述反馈单元用于在所述公共电极的实际电压比所述预设电压大时，降低所述第一输出端的电压；以及在所述公共电极的实际电压比所述预设电压小时，增大所述第一输出端的电压。
  14. 根据权利要求12所述的液晶显示装置，其中
    所述反馈单元还具有用于输入直流电压的第三输入端，所述反馈单元还用于根据所述第三输入端的输入电压，对所述第二输入端的输入电压进行处理，以使所述第一输出端输出所述反馈电压。
  15. 根据权利要求14所述的液晶显示装置，其中
    所述反馈单元包括：第一电阻、第二电阻、第三电阻、三极管；所述三极管具有发射极、基极、集电极；
    所述第二输入端通过所述第一电阻连接至所述三极管的基极，所述三极管的发射极接地；所述第三输入端通过所述第二电阻连接至所述三极管的集电极；所述第二电阻和所述集电极之间设置有一连接点，所述第三电阻的一端连接所述连接点，所述第三电阻的另一端连接在所述第二输入端和所述第一电阻之间；所述第一输出端与所述连接点连接。
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CN108597428A (zh) * 2018-04-28 2018-09-28 惠州市华星光电技术有限公司 驱动电压调试方法及液晶显示器
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