WO2020237760A1 - 像素驱动电路及像素驱动方法 - Google Patents

像素驱动电路及像素驱动方法 Download PDF

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Publication number
WO2020237760A1
WO2020237760A1 PCT/CN2019/092710 CN2019092710W WO2020237760A1 WO 2020237760 A1 WO2020237760 A1 WO 2020237760A1 CN 2019092710 W CN2019092710 W CN 2019092710W WO 2020237760 A1 WO2020237760 A1 WO 2020237760A1
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WIPO (PCT)
Prior art keywords
pixels
sub
column
odd
scan
Prior art date
Application number
PCT/CN2019/092710
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English (en)
French (fr)
Inventor
常勃彪
温亦谦
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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 US16/616,500 priority Critical patent/US20200380928A1/en
Publication of WO2020237760A1 publication Critical patent/WO2020237760A1/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
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Definitions

  • the present invention relates to the field of display technology, in particular to a pixel driving circuit and a pixel driving method.
  • TFT Thin Film Transistor
  • LCD Liquid Crystal Display
  • AMOLED Active Matrix Organic Light-Emitting Diode
  • liquid crystal displays which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is based on the thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate) and the color filter (Color Filter, CF)
  • the liquid crystal molecules are filled between the substrates, and the pixel voltage and the common voltage are applied to the two substrates.
  • the electric field formed between the pixel voltage and the common voltage controls the rotation direction of the liquid crystal molecules to reduce the backlight module
  • the light is transmitted out to produce a picture.
  • Liquid crystal molecules have a characteristic. If the same voltage is applied to the liquid crystal molecules for a long time, the liquid crystal molecules will be polarized. Even if the voltage is cancelled, the liquid crystal molecules will no longer be able to rotate due to changes in the electric field due to the destruction of the characteristics.
  • the display panel must be driven by AC. When displaying the picture, the liquid crystal molecules are flipped at a certain frequency to prevent the liquid crystal molecules from being fixed to the same direction and losing activity.
  • the LCD panel supports a variety of flip modes, such as dot flip mode, row flip mode, column flip mode, etc.
  • the way to achieve flip is mainly by continuously alternating the positive and negative polarity of the TFT source voltage (that is, the positive and negative polarity of the signal voltage). Negative polarity), or constantly alternate the positive and negative polarity of the common electrode to achieve the purpose of AC drive.
  • the existing pixel driving circuit includes a plurality of sub-pixels 10' arranged in an array, a plurality of scan lines 20' extending in a horizontal direction, and a plurality of data lines 30' extending in a vertical direction.
  • a scan line 20' corresponds to a row of sub-pixels 10', each column of sub-pixels 10' is alternately connected to the data lines 30' adjacent to the column of sub-pixels 10', and odd scan lines 20' and even scan lines 20' alternate
  • the scanning signals are transmitted to the odd-numbered row sub-pixels 10' and even-numbered sub-pixels 10', that is, the odd-numbered row sub-pixels 10' are turned on when the odd-numbered frame is displayed, and the even-numbered row sub-pixels 10' are turned on when the even-numbered frame is displayed, and multiple
  • the data line 30' changes the voltage polarity once every frame of display.
  • the sub-pixels 10' in odd rows in the first column of sub-pixels 10' are turned on when the first frame is displayed, and the data line 30' transmits a positive voltage to The sub-pixels 10' in the odd-numbered rows in the first column of sub-pixels 10'; the sub-pixels 10' in the odd-numbered rows in the first column of sub-pixels 10' are turned off when the second frame is displayed, and the sub-pixels 10' in the first column are in the even-numbered rows
  • the data line 30' transmits a negative voltage to the sub-pixels 10' in the even-numbered rows in the first column of sub-pixels 10';
  • the sub-pixel 10' is turned on when the third frame is displayed, and the data line 30' transmits a positive voltage to the sub-pixels 10' in odd rows in the first column of sub-pixels 10'.
  • the prior art pixel driving method will As a result, the voltage polarity of the sub-pixel 10' remains unchanged, which in turn leads to a polarization phenomenon of the liquid crystal, which will cause the uniformity of the picture to deteriorate to a certain extent, and affect the display quality.
  • the purpose of the present invention is to provide a pixel drive circuit, which can solve the problem of the polarization of liquid crystal, improve the uniformity of the picture to a certain extent, and improve the display quality.
  • the purpose of the present invention is also to provide a pixel driving method, which can solve the problem of polarization of liquid crystal, improve the uniformity of the picture to a certain extent, and improve the display quality.
  • the present invention provides a pixel driving circuit, including: a plurality of sub-pixels arranged in an array, a plurality of scan lines extending in a horizontal direction, and a plurality of data lines extending in a vertical direction;
  • the lines correspond to a row of sub-pixels, and each column of sub-pixels is alternately connected to the data lines adjacent to the left and right of the column of sub-pixels;
  • the odd scan lines are used to transmit scan signals to the odd rows of sub-pixels in the odd frame display picture
  • the even-numbered scan lines are used to transmit scan signals to the even-numbered rows of sub-pixels in the even-numbered frame display screen;
  • the multiple data lines are used to transmit voltage signals to the sub-pixels, and the voltage signals change polarity every two frames of the display screen.
  • the sub-pixels in the odd-numbered rows in each column of sub-pixels are connected to the data line adjacent to the right side of the column of sub-pixels; the sub-pixels in the even-numbered rows in each column of sub-pixels are connected to the data line adjacent to the left side of the column of sub-pixels.
  • the multiple data lines alternately transmit voltage signals of different polarities in the same frame of display picture.
  • the pixel driving circuit further includes a first GOA unit connected to the odd number of scan lines and a second GOA unit connected to the even number of scan lines;
  • the first GOA unit and the second GOA unit are used to transmit scanning signals to odd scan lines and even scan lines, respectively.
  • the pixel driving circuit also includes a source driver connected to a plurality of data lines; the source driver is used to transmit voltage signals to the data lines.
  • the present invention also provides a pixel driving method, which includes the following steps:
  • Step S1 Provide a pixel driving circuit;
  • the pixel driving circuit includes: a plurality of sub-pixels arranged in an array, a plurality of scan lines extending in a horizontal direction, and a plurality of data lines extending in a vertical direction; each scan line corresponds to Connect a row of sub-pixels, and each column of sub-pixels are respectively alternately connected to the data lines adjacent to the left and right of the column of sub-pixels;
  • Step S2 The odd scan lines transmit scan signals to the odd rows of sub-pixels in the odd-numbered frame; the even scan lines transmit scan signals to the even rows of sub-pixels in the even-numbered frame;
  • Step S3 multiple data lines transmit voltage signals to the sub-pixels, and the voltage signals change their polarity every two frames of the display screen.
  • the sub-pixels in the odd-numbered rows in each column of sub-pixels are connected to the data line adjacent to the right side of the column of sub-pixels; the sub-pixels in the even-numbered rows in each column of sub-pixels are connected to the data line adjacent to the left side of the column of sub-pixels.
  • the multiple data lines alternately transmit voltage signals of different polarities in the same frame of display picture.
  • the pixel driving circuit further includes a first GOA unit connected to the odd number of scan lines and a second GOA unit connected to the even number of scan lines;
  • the first GOA unit and the second GOA unit respectively transmit scan signals to odd scan lines and even scan lines.
  • the pixel driving circuit further includes a source driver connected to a plurality of data lines;
  • the source driver transmits a voltage signal to the data line.
  • the pixel driving circuit of the present invention includes: a plurality of sub-pixels arranged in an array, a plurality of scan lines extending in a horizontal direction, and a plurality of data lines extending in a vertical direction, each scan line is correspondingly connected A row of sub-pixels, each column of sub-pixels are respectively interlacedly connected to the data lines adjacent to the left and right of the column of sub-pixels.
  • the odd-numbered scan lines are used to transmit scan signals to the odd-numbered rows of sub-pixels in the odd-numbered frame, and the even-numbered scan lines are used in the even-numbered frames.
  • the frame display image transmits scanning signals to the even-numbered rows of sub-pixels, and multiple data lines are used to transmit voltage signals to the sub-pixels.
  • the voltage signals change the polarity every two frames of the display image, which can solve the problem of polarization of the liquid crystal. Improve the uniformity of the picture and improve the display quality.
  • the pixel driving method of the present invention can solve the problem of polarization of the liquid crystal, improve the uniformity of the picture to a certain extent, and improve the display quality.
  • FIG. 1 is a schematic diagram of a conventional pixel driving circuit
  • FIG. 2 is a schematic diagram of the pixel driving circuit of the present invention.
  • FIG. 3 is a flowchart of the pixel driving method of the present invention.
  • the present invention provides a pixel driving circuit including: a plurality of sub-pixels 10 arranged in an array, a plurality of scan lines 20 extending in a horizontal direction, and a plurality of data lines 30 extending in a vertical direction; each A scan line 20 is correspondingly connected to a row of sub-pixels 10, and each column of sub-pixels 10 is alternately connected to the data lines 30 adjacent to the column of sub-pixels 10;
  • the odd-numbered scan lines 20 are used to transmit scan signals to the odd-numbered rows of sub-pixels 10 in the odd-numbered frame display image;
  • the even-numbered scan lines 20 are used to transmit scan signals to the even-numbered rows of sub-pixels 10 in the even-numbered frame display screen;
  • the multiple data lines 30 are used to transmit voltage signals to the sub-pixels 10, and the voltage signals change their polarity every two frames of the display screen.
  • odd scan lines 20 are used to transmit scan signals to odd rows of sub-pixels 10 in odd-numbered frames
  • even scan lines 20 are used to transmit even-numbered rows of sub-pixels 10 in even frames.
  • Scan signal that is, the odd rows of sub-pixels 10 are turned on when the picture is displayed in odd frames
  • the even rows of sub-pixels 10 are turned on when the picture is displayed in even frames.
  • Multiple data lines 30 are used to transmit voltage signals to the sub-pixels 10 when the sub-pixels 10 are turned on. And the voltage signal changes its polarity every two frames of the display screen, which can solve the problem of polarization of the liquid crystal, improve the uniformity of the screen to a certain extent, and improve the display quality.
  • all data lines 30 transmit voltage signals of the same polarity in the same frame of display: the sub-pixels 10 located in odd rows in the first column of sub-pixels 10 are turned on when the first frame is displayed. The sub-pixels 10 in the even-numbered rows in the column of sub-pixels 10 are turned off when the first frame is displayed, and the data line 30 transmits a positive voltage signal to the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the second frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the second frame.
  • the data line 30 transmits positive polarity
  • the voltage signal is given to the sub-pixels 10 in the even rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the third frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the first frame, and the data line 30 transmits negative polarity
  • the voltage signal is given to the sub-pixels 10 located in odd rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the fourth frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the first frame, and the data line 30 transmits negative polarity
  • the voltage signal is given to the sub-pixels 10 in the even rows in the first column of sub-pixels 10;
  • each sub-pixel 10 will change the polarity of the received voltage signal every two frames of the display screen, so that the problem of the polarization of the liquid crystal can be solved.
  • the pixel driving circuit further includes a first GOA (Gate Driver on Array) connected to an odd number of scan lines 20, which uses the existing thin film transistor liquid crystal panel array manufacturing process to integrate the gate row scan driving circuit into On the array substrate) the unit 40 and the second GOA unit 50 connected to the even number of scan lines 20;
  • GOA Gate Driver on Array
  • the first GOA unit 40 and the second GOA unit 50 are used to transmit scan signals to odd scan lines 20 and even scan lines 20 respectively.
  • first GOA unit 40 and the second GOA unit 50 are respectively located on the left and right sides of the plurality of sub-pixels 10.
  • the pixel driving circuit further includes a source driver 60 connected to a plurality of data lines 30; the source driver 60 is used to transmit a voltage signal to the data line 30.
  • the multiple data lines 30 alternately transmit voltage signals of different polarities in the same frame of display picture.
  • the first data line 30 transmits a voltage signal of negative polarity
  • the second data line 30 transmits a voltage signal of positive polarity
  • the third data line 30 transmits a voltage signal of negative polarity.
  • the sub-pixels 10 located in odd rows in each column of sub-pixels 10 are connected to the data line 30 adjacent to the right side of the column of sub-pixels 10; the sub-pixels 10 located in even-numbered rows in each column of sub-pixels 10 are connected to the sub-pixels 10 in the column.
  • the sub-pixels 10 located in odd rows in the first column of sub-pixels 10 are turned on during the first frame of display.
  • the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the first frame, and the data line 30 adjacent to the right side of the first-column sub-pixels 10 transmits positive voltage signals to the sub-pixels in the first column 10 in odd-numbered rows.
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the second frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the second frame.
  • the data line 30 adjacent to the left transmits a negative voltage signal to the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the third frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the first frame.
  • the data line 30 adjacent to the right transmits a negative polarity voltage signal to the sub-pixels 10 located in odd rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the screen is displayed in the fourth frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the screen is displayed in the first frame.
  • the data line 30 adjacent to the left transmits a positive voltage signal to the sub-pixels 10 in the even rows in the first column of sub-pixels 10.
  • the present invention also provides a pixel driving method, which includes the following steps:
  • Step S1 Provide a pixel driving circuit;
  • the pixel driving circuit includes: a plurality of sub-pixels 10 arranged in an array, a plurality of scan lines 20 extending in a horizontal direction, and a plurality of data lines 30 extending in a vertical direction; each The scan line 20 is correspondingly connected to a row of sub-pixels 10, and each column of sub-pixels 10 is alternately connected to the data lines 30 adjacent to the column of sub-pixels 10;
  • Step S2 The odd scan lines 20 transmit scan signals to the odd row sub-pixels 10 in the odd frame display image; the even scan lines 20 transmit scan signals to the even row sub-pixels 10 in the even frame display image;
  • Step S3 The multiple data lines 30 transmit voltage signals to the sub-pixels 10, and the voltage signals change their polarity every two frames of the display screen.
  • odd scan lines 20 transmit scan signals to odd rows of sub-pixels 10 in odd frames
  • even scan lines 20 transmit scan signals to even rows of sub pixels 10 in even frames. That is, the odd-numbered rows of sub-pixels 10 are turned on when the picture is displayed in odd frames, and the even-numbered rows of sub-pixels 10 are turned on when the pictures are displayed in even-numbered frames.
  • Changing the polarity of the frame display picture once can solve the problem of polarization of the liquid crystal, improve the uniformity of the picture to a certain extent, and improve the display quality.
  • all data lines 30 transmit voltage signals of the same polarity in the same frame of display: the sub-pixels 10 located in odd rows in the first column of sub-pixels 10 are turned on when the first frame is displayed. The sub-pixels 10 in the even-numbered rows in the column of sub-pixels 10 are turned off when the first frame is displayed, and the data line 30 transmits a positive voltage signal to the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the second frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the second frame.
  • the data line 30 transmits positive polarity
  • the voltage signal is given to the sub-pixels 10 in the even rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the third frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the first frame, and the data line 30 transmits negative polarity
  • the voltage signal is given to the sub-pixels 10 located in odd rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the screen is displayed in the fourth frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the screen is displayed in the first frame, and the data line 30 transmits negative polarity
  • the voltage signal is given to the sub-pixels 10 in the even rows in the first column of sub-pixels 10;
  • each sub-pixel 10 will change the polarity of the received voltage signal every two frames of the display screen, thereby solving the problem of polarization of the liquid crystal.
  • the pixel driving circuit further includes a first GOA unit 40 connected to the odd scan lines 20 and a second GOA unit 50 connected to the even scan lines 20;
  • the first GOA unit 40 and the second GOA unit 50 transmit scanning signals to the odd-numbered scan lines 20 and the even-numbered scan lines 20, respectively.
  • first GOA unit 40 and the second GOA unit 50 are respectively located on the left and right sides of the plurality of sub-pixels 10.
  • the pixel driving circuit further includes a source driver 60 connected to a plurality of data lines 30; in the step S3, the source driver 60 transmits a voltage signal to the data line 30.
  • the multiple data lines 30 alternately transmit voltage signals of different polarities in the same frame of display picture.
  • the first data line 30 transmits a voltage signal of negative polarity
  • the second data line 30 transmits a voltage signal of positive polarity
  • the third data line 30 transmits a voltage signal of negative polarity.
  • the sub-pixels 10 located in odd rows in each column of sub-pixels 10 are connected to the data line 30 adjacent to the right side of the column of sub-pixels 10; the sub-pixels 10 located in even-numbered rows in each column of sub-pixels 10 are connected to the sub-pixels 10 in the column.
  • the sub-pixels 10 located in odd rows in the first column of sub-pixels 10 are turned on during the first frame of display.
  • the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the first frame, and the data line 30 adjacent to the right side of the first-column sub-pixels 10 transmits positive voltage signals to the sub-pixels in the first column 10 in odd-numbered rows.
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the second frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the second frame.
  • the data line 30 adjacent to the left transmits a negative voltage signal to the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned on when the picture is displayed in the third frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned off when the picture is displayed in the first frame.
  • the data line 30 adjacent to the right transmits a negative polarity voltage signal to the sub-pixels 10 located in odd rows in the first column of sub-pixels 10;
  • the sub-pixels 10 in the odd-numbered rows in the first column of sub-pixels 10 are turned off when the screen is displayed in the fourth frame, and the sub-pixels 10 in the even-numbered rows in the first column of sub-pixels 10 are turned on when the screen is displayed in the first frame.
  • the data line 30 adjacent to the left transmits a positive voltage signal to the sub-pixels 10 in the even rows in the first column of sub-pixels 10.
  • the pixel driving circuit of the present invention includes: a plurality of sub-pixels arranged in an array, a plurality of scan lines extending in the horizontal direction, and a plurality of data lines extending in the vertical direction, each scan line is connected to one row Sub-pixels, each column of sub-pixels are interlacedly connected to the data lines adjacent to the left and right of the column of sub-pixels. Odd-numbered scan lines are used to transmit scan signals to odd-numbered rows of sub-pixels in odd-numbered frames, and even-numbered scan lines are used in even-numbered frames.
  • the display screen transmits scanning signals to even-numbered rows of sub-pixels, and multiple data lines are used to transmit voltage signals to sub-pixels.
  • the voltage signals change polarity every two frames of the display screen, which can solve the problem of liquid crystal polarization and improve it to a certain extent.
  • the uniformity of the picture improves the display quality.
  • the pixel driving method of the present invention can solve the problem of polarization of the liquid crystal, improve the uniformity of the picture to a certain extent, and improve the display quality.

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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)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

本发明提供一种像素驱动电路及像素驱动方法。该像素驱动电路包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线，每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线，奇数条扫描线用于在奇数帧显示画面时给奇数行子像素传输扫描信号，偶数条扫描线用于在偶数帧显示画面时给偶数行子像素传输扫描信号，多条数据线用于给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。

Description

像素驱动电路及像素驱动方法 技术领域
本发明涉及显示技术领域，尤其涉及一种像素驱动电路及像素驱动方法。
 背景技术
薄膜晶体管（Thin Film Transistor，TFT）是目前液晶显示装置（Liquid Crystal Display，LCD）和有源矩阵驱动式有机电致发光显示装置（Active Matrix Organic Light-Emitting Diode，AMOLED）中的主要驱动元件，直接关系平板显示装置的显示性能。
现有市场上的液晶显示器大部分为背光型液晶显示器，其包括液晶显示面板及背光模组（backlight module）。液晶显示面板的工作原理是在薄膜晶体管阵列基板（Thin Film Transistor Array Substrate，TFT Array Substrate）与彩色滤光片（Color Filter，CF）基板之间灌入液晶分子，并在两片基板上分别施加像素电压和公共电压，通过像素电压和公共电压之间形成的电场控制液晶分子的旋转方向，以将背光模组的光线透射出来产生画面。
液晶分子具有一种特性，如果长时间给液晶分子施加同向电压，会使液晶分子极化，即使将电压取消，液晶分子亦会因为特性的破坏而无法再因电场的变化而转动，因此液晶显示面板必须是通过交流驱动，在显示画面时的时候以一定的频率去翻转液晶分子，防止液晶分子固定偏向同一个方向而失去活性。目前，液晶显示面板支持多种翻转模式，比如点翻转模式、行翻转模式、列翻转模式等，实现翻转的途径主要是通过不断交替TFT源极电压的正、负极性（即信号电压的正、负极性），或不断交替公共电极的正、负极性，以达到交流驱动的目的。
如图1所示，现有的像素驱动电路包括呈阵列排布的多个子像素10’、沿水平方向延伸的多条扫描线20’以及沿竖直方向延伸的多条数据线30’，每条扫描线20’对应连接一行子像素10’，每列子像素10’交错连接到与该列子像素10’左右相邻的数据线30’，奇数条扫描线20’和偶数条扫描线20’交替给奇数行子像素10’和偶数行子像素10’传输扫描信号，也就是在奇数帧显示画面时奇数行子像素10’打开，偶数帧显示画面时偶数行子像素10’ 打开，而多条数据线30’均是每帧显示画面改变一次电压极性，例如第一列子像素10’中位于奇数行的子像素10’在第一帧显示画面时打开，数据线30’传输正极性电压给第一列子像素10’中位于奇数行的子像素10’；第一列子像素10’中位于奇数行的子像素10’在第二帧显示画面时关闭，第一列子像素10’中位于偶数行的子像素10’在第二帧显示画面时打开，数据线30’传输负极性电压给第一列子像素10’中位于偶数行的子像素10’；第一列子像素10’中位于奇数行的子像素10’在第三帧显示画面时打开，数据线30’又传输正极性电压给第一列子像素10’中位于奇数行的子像素10’，依次类推，现有技术的像素驱动方式会造成子像素10’的电压极性不变，进而导致液晶出现极化现象，一定程度上会造成画面的均匀度变差，会影响显示质量。
 技术问题
本发明的目的在于提供一种像素驱动电路，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。
本发明的目的还在于提供一种像素驱动方法，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。
 技术解决方案
为实现上述目的，本发明提供了一种像素驱动电路，包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线；每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线；
奇数条扫描线用于在奇数帧显示画面给奇数行子像素传输扫描信号；
偶数条扫描线用于在偶数帧显示画面给偶数行子像素传输扫描信号；
多条数据线用于给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性。
每列子像素中位于奇数行的子像素连接到与该列子像素右侧相邻的数据线；每列子像素中位于偶数行的子像素连接到与该列子像素左侧相邻的数据线。
所述多条数据线在同一帧显示画面中交替传输不同极性的电压信号。
所述像素驱动电路还包括与奇数条扫描线均连接的第一GOA单元以及与所述偶数条扫描线均连接的第二GOA单元；
所述第一GOA单元和第二GOA单元用于分别给奇数条扫描线和偶数条扫描线传输扫描信号。
所述像素驱动电路还包括与多条数据线均连接的源极驱动器；所述源极驱动器用于给数据线传输电压信号。
本发明还提供一种像素驱动方法，包括如下步骤：
步骤S1、提供像素驱动电路；所述像素驱动电路包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线；每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线；
步骤S2、奇数条扫描线在奇数帧显示画面给奇数行子像素传输扫描信号；偶数条扫描线在偶数帧显示画面给偶数行子像素传输扫描信号；
步骤S3、多条数据线给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性。
每列子像素中位于奇数行的子像素连接到与该列子像素右侧相邻的数据线；每列子像素中位于偶数行的子像素连接到与该列子像素左侧相邻的数据线。
所述多条数据线在同一帧显示画面中交替传输不同极性的电压信号。
所述像素驱动电路还包括与奇数条扫描线均连接的第一GOA单元以及与所述偶数条扫描线均连接的第二GOA单元；
所述步骤S2中，所述第一GOA单元和第二GOA单元分别给奇数条扫描线和偶数条扫描线传输扫描信号。
所述像素驱动电路还包括与多条数据线均连接的源极驱动器；
所述步骤S3中，所述源极驱动器给数据线传输电压信号。
 有益效果
本发明的有益效果：本发明的像素驱动电路包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线，每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线，奇数条扫描线用于在奇数帧显示画面给奇数行子像素传输扫描信号，偶数条扫描线用于在偶数帧显示画面给偶数行子像素传输扫描信号，多条数据线用于给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。本发明的像素驱动方法，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。
 附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为现有的像素驱动电路的示意图；
图2为本发明的像素驱动电路的示意图；
图3为本发明的像素驱动方法的流程图。
 本发明的实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2，本发明提供一种像素驱动电路，包括：呈阵列排布的多个子像素10、沿水平方向延伸的多条扫描线20以及沿竖直方向延伸的多条数据线30；每条扫描线20对应连接一行子像素10，每列子像素10分别交错连接到与该列子像素10左右相邻的数据线30；
奇数条扫描线20用于在奇数帧显示画面给奇数行子像素10传输扫描信号；
偶数条扫描线20用于在偶数帧显示画面给偶数行子像素10传输扫描信号；
多条数据线30用于给子像素10传输电压信号，且电压信号每两帧显示画面改变一次极性。
需要说明的是，本发明通过设置奇数条扫描线20用于在奇数帧显示画面给奇数行子像素10传输扫描信号，偶数条扫描线20用于在偶数帧显示画面给偶数行子像素10传输扫描信号，也就是在奇数帧显示画面时奇数行子像素10打开，偶数帧显示画面时偶数行子像素10打开，多条数据线30用于在子像素10打开时给子像素10传输电压信号，且电压信号每两帧显示画面改变一次极性，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。
以第一列子像素10，所有数据线30同一帧显示画面均传输相同极性的电压信号举例说明：第一列子像素10中位于奇数行的子像素10在第一帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，数据线30传输正极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第二帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第二帧显示画面时打开，数据线30传输正极性电压信号给第一列子像素10中位于偶数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第三帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，数据线30传输负极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第四帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时打开，数据线30传输负极性电压信号给第一列子像素10中位于偶数行的子像素10；
依次类推，每个子像素10每两帧显示画面会使接收到电压信号改变一次极性，从而可以解决液晶被极化的问题。
具体的，所述像素驱动电路还包括与奇数条扫描线20均连接的第一GOA（Gate Driver on Array，是利用现有的薄膜晶体管液晶面板的阵列制程将栅极行扫描驱动电路集成制作在阵列基板上）单元40以及与所述偶数条扫描线20均连接的第二GOA单元50；
所述第一GOA单元40和第二GOA单元50用于分别给奇数条扫描线20和偶数条扫描线20传输扫描信号。
进一步的，所述第一GOA单元40和第二GOA单元50分别位于多个子像素10的左右两侧。
具体的，所述像素驱动电路还包括与多条数据线30均连接的源极驱动器60；所述源极驱动器60用于给数据线30传输电压信号。
具体的，所述多条数据线30在同一帧显示画面中交替传输不同极性的电压信号。例如，在第一帧显示画面中，第一条数据线30传输负极性的电压信号，第二条数据线30传输正极性的电压信号，第三条数据线30传输负极性的电压信号，依次类推。
具体的，每列子像素10中位于奇数行的子像素10连接到与该列子像素10右侧相邻的数据线30；每列子像素10中位于偶数行的子像素10连接到与该列子像素10左侧相邻的数据线30。
以第一列子像素10，所有数据线30在同一帧显示画面中交替传输不同极性的电压信号举例说明：第一列子像素10中位于奇数行的子像素10在第一帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，与第一列子像素10右侧相邻的数据线30传输正极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第二帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第二帧显示画面时打开，与第一列子像素10左侧相邻的数据线30传输负极性电压信号给第一列子像素10中位于偶数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第三帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，与第一列子像素10右侧相邻的数据线30传输负极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第四帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时打开，与第一列子像素10左侧相邻的数据线30传输正极性电压信号给第一列子像素10中位于偶数行的子像素10。
请参阅图3，基于上述像素驱动电路，本发明还提供一种像素驱动方法，包括如下步骤：
步骤S1、提供像素驱动电路；所述像素驱动电路包括：呈阵列排布的多个子像素10、沿水平方向延伸的多条扫描线20以及沿竖直方向延伸的多条数据线30；每条扫描线20对应连接一行子像素10，每列子像素10分别交错连接到与该列子像素10左右相邻的数据线30；
步骤S2、奇数条扫描线20在奇数帧显示画面给奇数行子像素10传输扫描信号；偶数条扫描线20在偶数帧显示画面给偶数行子像素10传输扫描信号；
步骤S3、多条数据线30给子像素10传输电压信号，且电压信号每两帧显示画面改变一次极性。
需要说明的是，本发明通过设置奇数条扫描线20在奇数帧显示画面给奇数行子像素10传输扫描信号，偶数条扫描线20在偶数帧显示画面给偶数行子像素10传输扫描信号，也就是在奇数帧显示画面时奇数行子像素10打开，偶数帧显示画面时偶数行子像素10打开，多条数据线30在子像素10打开时给子像素10传输电压信号，且电压信号每两帧显示画面改变一次极性，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。
以第一列子像素10，所有数据线30同一帧显示画面均传输相同极性的电压信号举例说明：第一列子像素10中位于奇数行的子像素10在第一帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，数据线30传输正极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第二帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第二帧显示画面时打开，数据线30传输正极性电压信号给第一列子像素10中位于偶数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第三帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，数据线30传输负极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第四帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时打开，数据线30传输负极性电压信号给第一列子像素10中位于偶数行的子像素10；
依次类推，每个子像素10每两帧显示画面会使接收到电压信号改变一次极性，从而可以解决液晶被极化的问题。
具体的，所述像素驱动电路还包括与奇数条扫描线20均连接的第一GOA单元40以及与所述偶数条扫描线20均连接的第二GOA单元50；
所述步骤S2中，所述第一GOA单元40和第二GOA单元50分别给奇数条扫描线20和偶数条扫描线20传输扫描信号。
进一步的，所述第一GOA单元40和第二GOA单元50分别位于多个子像素10的左右两侧。
具体的，所述像素驱动电路还包括与多条数据线30均连接的源极驱动器60；所述步骤S3中，所述源极驱动器60给数据线30传输电压信号。
具体的，所述步骤S3中，所述多条数据线30在同一帧显示画面中交替传输不同极性的电压信号。例如，在第一帧显示画面中，第一条数据线30传输负极性的电压信号，第二条数据线30传输正极性的电压信号，第三条数据线30传输负极性的电压信号，依次类推。
具体的，每列子像素10中位于奇数行的子像素10连接到与该列子像素10右侧相邻的数据线30；每列子像素10中位于偶数行的子像素10连接到与该列子像素10左侧相邻的数据线30。
以第一列子像素10，所有数据线30在同一帧显示画面中交替传输不同极性的电压信号举例说明：第一列子像素10中位于奇数行的子像素10在第一帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，与第一列子像素10右侧相邻的数据线30传输正极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第二帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第二帧显示画面时打开，与第一列子像素10左侧相邻的数据线30传输负极性电压信号给第一列子像素10中位于偶数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第三帧显示画面时打开，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时关闭，与第一列子像素10右侧相邻的数据线30传输负极性电压信号给第一列子像素10中位于奇数行的子像素10；
第一列子像素10中位于奇数行的子像素10在第四帧显示画面时关闭，第一列子像素10中位于偶数行的子像素10在第一帧显示画面时打开，与第一列子像素10左侧相邻的数据线30传输正极性电压信号给第一列子像素10中位于偶数行的子像素10。
综上所述，本发明的像素驱动电路包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线，每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线，奇数条扫描线用于在奇数帧显示画面给奇数行子像素传输扫描信号，偶数条扫描线用于在偶数帧显示画面给偶数行子像素传输扫描信号，多条数据线用于给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。本发明的像素驱动方法，可以解决液晶被极化的问题，一定程度上改善画面的均匀度，提高显示质量。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (10)

  1. 一种像素驱动电路，包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线；每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线；
    奇数条扫描线用于在奇数帧显示画面给奇数行子像素传输扫描信号；
    偶数条扫描线用于在偶数帧显示画面给偶数行子像素传输扫描信号；
    多条数据线用于给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性。
  2. 如权利要求1所述的像素驱动电路，其中，每列子像素中位于奇数行的子像素连接到与该列子像素右侧相邻的数据线；每列子像素中位于偶数行的子像素连接到与该列子像素左侧相邻的数据线。
  3. 如权利要求1所述的像素驱动电路，其中，所述多条数据线在同一帧显示画面中交替传输不同极性的电压信号。
  4. 如权利要求1所述的像素驱动电路，还包括与奇数条扫描线均连接的第一GOA单元以及与所述偶数条扫描线均连接的第二GOA单元；
    所述第一GOA单元和第二GOA单元用于分别给奇数条扫描线和偶数条扫描线传输扫描信号。
  5. 如权利要求1所述的像素驱动电路，还包括与多条数据线均连接的源极驱动器；所述源极驱动器用于给数据线传输电压信号。
  6. 一种像素驱动方法，包括如下步骤：
    步骤S1、提供像素驱动电路；所述像素驱动电路包括：呈阵列排布的多个子像素、沿水平方向延伸的多条扫描线以及沿竖直方向延伸的多条数据线；每条扫描线对应连接一行子像素，每列子像素分别交错连接到与该列子像素左右相邻的数据线；
    步骤S2、奇数条扫描线在奇数帧显示画面给奇数行子像素传输扫描信号；偶数条扫描线在偶数帧显示画面给偶数行子像素传输扫描信号；
    步骤S3、多条数据线给子像素传输电压信号，且电压信号每两帧显示画面改变一次极性。
  7. 如权利要求6所述的像素驱动方法，其中，每列子像素中位于奇数行的子像素连接到与该列子像素右侧相邻的数据线；每列子像素中位于偶数行的子像素连接到与该列子像素左侧相邻的数据线。
  8. 如权利要求6所述的像素驱动方法，其中，所述步骤S3中，所述多条数据线在同一帧显示画面中交替传输不同极性的电压信号。
  9. 如权利要求6所述的像素驱动方法，其中，所述像素驱动电路还包括与奇数条扫描线均连接的第一GOA单元以及与所述偶数条扫描线均连接的第二GOA单元；
    所述步骤S2中，所述第一GOA单元和第二GOA单元分别给奇数条扫描线和偶数条扫描线传输扫描信号。
  10. 如权利要求6所述的像素驱动方法，其中，所述像素驱动电路还包括与多条数据线均连接的源极驱动器；
    所述步骤S3中，所述源极驱动器给数据线传输电压信号。
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