WO2020042310A1 - 一种显示面板的驱动方法及装置 - Google Patents

一种显示面板的驱动方法及装置 Download PDF

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Publication number
WO2020042310A1
WO2020042310A1 PCT/CN2018/111485 CN2018111485W WO2020042310A1 WO 2020042310 A1 WO2020042310 A1 WO 2020042310A1 CN 2018111485 W CN2018111485 W CN 2018111485W WO 2020042310 A1 WO2020042310 A1 WO 2020042310A1
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WO
WIPO (PCT)
Prior art keywords
row
pixel
driving unit
pixel driving
unit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/111485
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English (en)
French (fr)
Inventor
纪飞林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
Original Assignee
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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Publication date
Application filed by HKC Co Ltd, Chongqing HKC Optoelectronics Technology Co Ltd filed Critical HKC Co Ltd
Priority to US16/311,396 priority Critical patent/US10770019B2/en
Publication of WO2020042310A1 publication Critical patent/WO2020042310A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/3674—Details of drivers for scan electrodes
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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
    • G09G3/3614—Control of polarity reversal in general
    • 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

Definitions

  • the present application belongs to the field of electronic technology, and in particular relates to a method and a device for driving a display panel.
  • the liquid crystal panel includes pixel units in rows and columns.
  • a gate driving signal controls a thin film transistor (Thin Film) in the pixel unit.
  • Transistor TFT
  • TFT Transistor
  • the LCD panel is an important part of the display device.
  • the gate chip gate The number of ICs has also gradually increased.
  • gate on circuit array GAA technology integrates the functions of the gate IC on the glass panel of the display panel, so that the panel itself can control the thin film transistor.
  • the switch does not need to be driven by the gate IC, which can significantly reduce costs and is widely used in display devices.
  • the existing GOA driving circuit usually has a problem of insufficient charging, which may cause the display panel to display abnormally.
  • the existing GOA driving circuit usually has a problem of insufficient charging, which may cause the display panel to display abnormally.
  • the embodiments of the present application provide a method and a device for driving a display panel, which aim to solve the problem that the GOA driving circuit is insufficiently charged, which may cause the display panel to display abnormally.
  • An embodiment of the present application provides a method for driving a display panel.
  • the display panel includes an array of pixel display units, and
  • a driving unit configured to drive the pixel display unit
  • the liquid crystal polarity of the liquid crystal molecules in the x-th row is the same as that of the liquid crystal molecules in the x + 4m row, where x is an integer greater than or equal to 1, and m is an integer greater than or equal to 1.
  • the driving method includes:
  • the start scan signal includes two pulse signals
  • the pixel driving unit in the x-th row receives the second pulse signal, the pixel driving unit in the x-th row is charged, and the pixel driving unit in the x-th row is written, and at the same time, the x + 4m-th row is written.
  • the pixel driving unit is precharged.
  • the start scanning signal is a start signal for displaying a frame of picture on the display panel.
  • the frequency of the initial scanning signal is 50-60 Hz.
  • the pre-charging the pixel driving unit in the x + 4m row includes:
  • the interval between the first pulse signal and the second pulse signal is 4n clock cycles, and n is an integer greater than or equal to 1.
  • pre-charging the pixel driving unit in the x-th row specifically includes:
  • the pixel driving unit in the x-th row When the pixel driving unit in the x-th row receives the first pulse signal of the start scanning signal, the pixel driving unit in the x-th row is charged to a first preset voltage level.
  • charging the pixel driving unit in the x-th row specifically includes:
  • the pixel driving unit in the x-th row When the pixel driving unit in the x-th row receives the second pulse signal of the initial scanning signal, the pixel driving unit in the x-th row is charged to a preset operating voltage level.
  • the liquid crystal polarity of the liquid crystal molecules starts from the second row and is inverted every two rows.
  • the display panel includes 2160 rows of pixel display units distributed in an array.
  • the pixel display unit is any one of a red pixel unit, a green pixel unit, and a blue pixel unit.
  • An embodiment of the present application further provides a driving device for a display panel, the display panel including an array of pixel display units, and
  • a driving unit configured to drive the pixel display unit
  • the liquid crystal polarity of the liquid crystal molecules in the x-th row is the same as that of the liquid crystal molecules in the x + 4m row, where x is an integer greater than or equal to 1, and m is an integer greater than or equal to 1.
  • the driving device includes:
  • the timing control module is configured to output a start scan signal, where the start scan signal includes two pulse signals;
  • a first charging module configured to pre-charge the pixel driving unit in the x-th row when the pixel driving unit in the x-th row receives the first pulse signal
  • the second charging module is configured to charge the pixel driving unit in the x-th row and write data to the pixel driving unit in the x-th row when the pixel driving unit in the x-th row receives the second pulse signal. To pre-charge the pixel driving unit in the x + 4mth row.
  • the start scanning signal is a start signal for displaying a frame of picture on the display panel.
  • the frequency of the initial scanning signal is 50-60 Hz.
  • the second charging module is further configured to precharge the pixel driving unit in the x + 4mth row to the voltage level of the pixel driving unit in the xth row.
  • the interval between the first pulse signal and the second pulse signal is 4n clock cycles, and n is an integer greater than or equal to 1.
  • the first charging module is further configured to charge the pixel driving unit in the x-th row to a preset when the pixel driving unit in the x-th row receives the second pulse signal of the initial scan signal.
  • Working voltage level is further configured to charge the pixel driving unit in the x-th row to a preset when the pixel driving unit in the x-th row receives the second pulse signal of the initial scan signal.
  • the liquid crystal polarity of the liquid crystal molecules starts from the second row and is inverted every two rows.
  • the pixel display unit is any one of a red pixel unit, a green pixel unit, and a blue pixel unit.
  • An embodiment of the present application further provides a method for driving a display panel, the display panel including an array of pixel display units, and
  • a driving unit configured to drive the pixel display unit
  • the liquid crystal polarity of the liquid crystal molecules in the x-th row is the same as that of the liquid crystal molecules in the x + 4m row.
  • the liquid crystal polarity of the liquid crystal molecules is reversed every two rows from the second row, where x is greater than or An integer equal to 1 and m is an integer greater than or equal to 1;
  • the driving method includes:
  • the start scan signal includes two pulse signals
  • the pixel driving unit in the x-th row When the pixel driving unit in the x-th row receives the first pulse signal, the pixel driving unit in the x-th row is charged to a first preset voltage level;
  • the pixel driving unit in the x-th row receives the second pulse signal, the pixel driving unit in the x-th row is charged, and the pixel driving unit in the x-th row is written, and at the same time, the x + 4m-th row The pixel driving unit is precharged to the voltage level of the pixel driving unit in the x-th row.
  • the interval between the first pulse signal and the second pulse signal is 4n clock cycles, and n is an integer greater than or equal to 1.
  • the embodiments of the present application provide a method and a device for driving a display panel.
  • the start scan signal includes two pulse signals.
  • To precharge the pixel driving unit in the xth row when the pixel driving unit in the xth row receives the second pulse signal, charge the pixel driving unit in the xth row, and charge the pixel driving unit in the xth row At the same time, data is written, and the pixel driving unit in the x + 4m row is pre-charged to improve the charging time of the pixel driving unit in the display panel, which solves the problem that the existing GOA driving circuit usually has insufficient charging. Problems that cause the display panel to display abnormally.
  • FIG. 1 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present application
  • FIG. 2 is a timing chart of the scanning time of the pixel display unit by the GOA circuit when the driving method according to an embodiment of the application provides a signal of 8 clock cycles;
  • FIG. 3 is a schematic structural diagram of a module of a driving device for a display panel according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of a driving method according to another embodiment of the present application.
  • the display panel includes an array of pixel display units and a pixel drive unit for driving the pixel display units to perform display.
  • pixel display units arranged in an array, liquid crystal molecules of the pixel display units in two rows from the second row
  • the polarity of the liquid crystal molecules in row x is the same as the polarity of the liquid crystal molecules in row x + 4m, where x is an integer greater than or equal to 1, and m is greater than or equal to 1. Integer.
  • FIG. 1 is a schematic flowchart of a method for driving a display panel according to an embodiment of the present application.
  • the driving method in this embodiment includes:
  • Step S10 Output a start scan signal, where the start scan signal includes two pulse signals
  • Step S20 when the pixel driving unit in the x-th row receives the first pulse signal, pre-charging the pixel driving unit in the x-th row;
  • Step S30 When the pixel driving unit in the x-th row receives the second pulse signal, charge the pixel driving unit in the x-th row, write data to the pixel driving unit in the x-th row, and at the same time, + 4m rows of pixel drive units are precharged.
  • the GOA circuit when driving the pixel driving unit in the display panel, the GOA circuit needs to receive a start scan signal (STV) and n clock cycle signals (CLK).
  • STV start scan signal
  • CLK clock cycle signals
  • the scanning time of the pixel display unit by the GOA circuit is as shown in FIG. 2.
  • the start scan signal is turned on twice before the rising edge of the periodic signal CK1 and the periodic signal CK5.
  • each row of gate lines in the display panel (gate line) will turn on twice.
  • the data signal of the pixel display unit is written, and the pixel driving unit drives the pixel display unit to display corresponding information according to the data signal.
  • the pixel driving unit is a thin film transistor.
  • each pixel has a thin film transistor, the gate is connected to the horizontal scanning line, the drain is connected to the data line in the vertical direction, and the source is connected to the pixel electrode.
  • the voltage applied on the horizontal scanning line reaches the working voltage, all the thin film transistors on the line are turned on.
  • the pixel electrode on the horizontal scanning line will be connected to the data line in the vertical direction, thereby connecting the display on the data line.
  • Signals are written into pixels to control the transmittance of different liquid crystals to achieve the purpose of controlling color.
  • the start scan signal is a start signal for displaying a frame of picture on the display panel.
  • the display panel includes a plurality of rows of pixel units forming a frame, and the scanning signal is scanned progressively by the pixel unit to form a complete frame of the frame. Scanning of one pixel unit.
  • the frequency of the initial scan signal is 50-60 Hz.
  • the precharging the pixel driving unit in the x + 4mth row includes: precharging the pixel driving unit in the x + 4mth row to a voltage level of the pixel driving unit in the xth row.
  • the thin film transistors in the x + 4mth row are precharged to reach the voltage level of the gate of the thin film transistor in the xth row, which is lower than the working voltage level of the thin film transistor.
  • the interval between the first pulse signal and the second pulse signal is 4n clock cycles, and n is an integer greater than or equal to 1.
  • pre-charging the pixel driving unit in the x-th row which specifically includes:
  • the pixel driving unit of the row receives the first pulse signal of the initial scanning signal
  • the pixel driving unit of the x-th row is charged to a first preset voltage level.
  • the first preset voltage level is a precharged stage, and the reached charging voltage of the pixel driving unit.
  • the first preset voltage level can be set according to user needs.
  • charging the pixel driving unit in the x-th row specifically includes: When the pixel driving unit receives the second pulse signal of the initial scanning signal, it charges the pixel driving unit in the x-th row to a preset operating voltage level. Specifically, the preset operating voltage level is driven by the pixel driving unit. The voltage of the pixel unit.
  • the voltage of the gate of the thin film transistor in the x-th row reaches a preset working voltage level.
  • the The thin film transistors in the x row are turned on, and the pixel electrodes on the horizontal scanning line of the row are connected to the data line in the vertical direction, so that the display signal voltage on the data line is written into the pixel, and the transmittance of different liquid crystals is controlled to achieve color control. the goal of.
  • the liquid crystal polarity of the liquid crystal molecules starts from the second row and is inverted every two rows.
  • the display panel includes 2160 rows of pixel display units distributed in an array.
  • the pixel display unit is any one of a red pixel unit, a green pixel unit, and a blue pixel unit.
  • FIG. 2 is a timing diagram of the scanning time of the pixel display unit by the GOA circuit when the driving method according to an embodiment of the present application is a signal of 8 clock cycles.
  • the start scan signal is turned on twice before the rising edge of the periodic signal CK1 and the periodic signal CK5. Then, each row of gate lines in the display panel (gate line) will be turned on twice, the first time to precharge the pixel drive unit when the rising edge of the periodic signal CK1 is turned on, the second time to officially charge the pixel drive unit when the rising edge of the periodic signal CK5 is turned on
  • the data signal of the pixel display unit is written, and the pixel driving unit drives the pixel display unit to display corresponding information according to the data signal.
  • FIG. 3 is a schematic structural diagram of a module of a driving device for a display panel according to an embodiment of the present application.
  • This embodiment provides a driving apparatus for a display panel, wherein the display panel includes an array of pixel display units, and
  • a driving unit configured to drive the pixel display unit
  • the liquid crystal polarity of the liquid crystal molecules in the x-th row is the same as that of the liquid crystal molecules in the x + 4m row, where x is an integer greater than or equal to 1, and m is an integer greater than or equal to 1.
  • the driving device includes:
  • the timing control module 10 is configured to output a start scan signal, where the start scan signal includes two pulse signals;
  • the first charging module 20 is configured to pre-charge the pixel driving unit in the x-th row when the pixel driving unit in the x-th row receives the first pulse signal;
  • the second charging module 30 is configured to charge the pixel driving unit in the x-th row and write data to the pixel driving unit in the x-th row when the pixel driving unit in the x-th row receives the second pulse signal, At the same time, the pixel driving unit in the x + 4m row is precharged.
  • the timing control module 10 outputs a start scan signal (STV) and n clock cycle signals (CLK). For example, as shown in FIG. 2, the start scan signal rises between the periodic signal CK1 and the periodic signal CK5.
  • STV start scan signal
  • CLK clock cycle signals
  • the start scan signal rises between the periodic signal CK1 and the periodic signal CK5.
  • each row of gate lines in the display panel is turned on twice.
  • the first time is to precharge the pixel driving unit when the rising edge of the periodic signal CK1 is turned on, and the second time is in the cycle.
  • the rising edge of the signal CK5 is turned on, the pixel driving unit is officially charged.
  • the pixel driving unit is completely charged, the data signal of the pixel display unit is written, and the pixel driving unit drives the pixel display unit to display corresponding information according to the data signal.
  • the start scan signal is a start signal for displaying a frame of picture on the display panel.
  • the frequency of the initial scan signal is 50-60 Hz.
  • the second charging module 30 is further configured to precharge the pixel driving units in the x + 4mth row to the voltage level of the pixel driving units in the xth row.
  • the interval between the first pulse signal and the second pulse signal is 4n clock cycles, and n is an integer greater than or equal to 1.
  • the first charging module 20 is further configured to charge the pixel driving unit in the x-th row when the pixel driving unit in the x-th row receives the second pulse signal of the initial scan signal. To the preset working voltage level.
  • the voltage of the gate of the thin film transistor in the x-th row reaches a preset working voltage level.
  • the The thin film transistors in the x row are turned on, and the pixel electrodes on the horizontal scanning line of the row are connected to the data line in the vertical direction, so that the display signal voltage on the data line is written into the pixel, and the transmittance of different liquid crystals is controlled to achieve color control. the goal of.
  • the liquid crystal polarity of the liquid crystal molecules starts from the second row and is inverted every two rows.
  • the pixel display unit is any one of a red pixel unit, a green pixel unit, and a blue pixel unit.
  • FIG. 4 is a schematic diagram of a driving method according to another embodiment of the present application.
  • the display panel includes an array of pixel display units
  • a driving unit configured to drive the pixel display unit
  • the liquid crystal polarity of the liquid crystal molecules in the x-th row is the same as the liquid crystal polarity of the liquid crystal molecules in the x + 4m-th row.
  • An integer equal to 1 and m is an integer greater than or equal to 1;
  • the driving method in this embodiment includes:
  • Step S41 output a start scan signal, where the start scan signal includes two pulse signals;
  • Step S42 when the pixel driving unit in the x-th row receives the first pulse signal, charge the pixel driving unit in the x-th row to a first preset voltage level;
  • Step S43 When the pixel driving unit in the x-th row receives the second pulse signal, charge the pixel driving unit in the x-th row, write data to the pixel driving unit in the x-th row, and at the same time, The pixel driving units in the + 4m row are precharged to the voltage level of the pixel driving unit in the x-th row.
  • the GOA circuit when driving the pixel driving unit in the display panel, the GOA circuit needs to receive a start scan signal (STV) and n clock cycle signals (CLK). For example, when FIG. 2 shows 8 clock cycle signals
  • STV start scan signal
  • CLK clock cycle signals
  • the scanning time of the pixel display unit by the GOA circuit is as shown in FIG. 2.
  • the start scan signal is turned on twice before the rising edge of the periodic signal CK1 and the periodic signal CK5. Then, each row of gate lines in the display panel (gate line) will turn on twice.
  • the data signal of the pixel display unit is written, and the pixel driving unit drives the pixel display unit to display corresponding information according to the data signal.
  • the pixel driving unit is a thin film transistor.
  • each pixel has a thin film transistor, the gate is connected to the horizontal scanning line, the drain is connected to the data line in the vertical direction, and the source is connected to the pixel electrode.
  • the voltage applied on the horizontal scanning line reaches the working voltage, all the thin film transistors on the line are turned on.
  • the pixel electrode on the horizontal scanning line will be connected to the data line in the vertical direction, thereby connecting the display on the data line.
  • Signals are written into pixels to control the transmittance of different liquid crystals to achieve the purpose of controlling color.
  • the interval between the first pulse signal and the second pulse signal is 4n clock cycles, and n is an integer greater than or equal to 1.
  • the units in the apparatus of the embodiment of the present application may be combined, divided, and deleted according to actual needs.
  • the program can be stored in a computer-readable storage medium.
  • the program When executed, the processes of the embodiments of the methods described above may be included.
  • the storage medium may be a magnetic disk, an optical disc, or a read-only storage memory (Read-Only Memory (ROM) or Random Access Memory (Random Access Memory, RAM).

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  • 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)

Abstract

公开了一种显示面板的驱动方法及装置。该显示面板通过输出起始扫描信号，该起始扫描信号包含两个脉冲信号（S10），在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电（S20），在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电（S30）。

Description

一种显示面板的驱动方法及装置 技术领域
本申请属于电子技术领域，尤其涉及一种显示面板的驱动方法及装置。
 背景技术
液晶面板包括成行和成列的像素单元，在液晶面板工作时，栅极驱动信号控制像素单元中的薄膜晶体管（Thin Film Transistor，TFT）的开启和关闭，从而完成液晶面板的行扫描，实现液晶面板显示图像的功能，因此，液晶面板是显示装置的重要组成部分，随着显示面板技术的发展，显示面板的解析度也逐渐提高，显示面板所需的栅极芯片（gate IC）的颗数也逐渐增加，为了减低成本，栅极驱动电路基板（Gate on Array，GOA）技术通过将gate IC的功能集成设计在显示面板的玻璃屏上，使得面板本身即可控制薄膜晶体管开关，不需要通过gate IC进行驱动，可以显著降低成本，被广泛用在显示装置中。
然而，现有的GOA驱动电路通常具有充电不足的问题，可能会导致显示面板显示异常。
 技术问题
现有的GOA驱动电路通常具有充电不足的问题，可能会导致显示面板显示异常。
 技术解决方案
本申请实施例提供一种显示面板的驱动方法及装置，旨在解决GOA驱动电路充电不足，可能会导致显示面板显示异常的问题。
本申请实施例提供一种显示面板的驱动方法，
所述显示面板包括阵列分布的像素显示单元，以及
驱动单元，设置为对所述像素显示单元进行驱动；
第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，其中，x为大于或等于1的整数，m为大于或等于1的整数；
所述驱动方法包括：
输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电；
在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电。
可选的，所述起始扫描信号为所述显示面板上显示一帧画面的起始信号。
可选的，所述起始扫描信号的频率为50-60Hz。
可选的，所述对第x+4m行的像素驱动单元进行预充电，包括：
将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位
可选的，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
可选的，所述在第x行的像素驱动单元接收到所述起始扫描信号的第一个脉冲信号时，对第x行的像素驱动单元进行预充电，具体包括：
在第x行的像素驱动单元接收到所述起始扫描信号的第一个脉冲信号时，将第x行的像素驱动单元充电至第一预设电压准位。
可选的，所述在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，对第x行的像素驱动单元进行充电具体包括：
在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，将第x行的像素驱动单元充电至预设工作电压准位。
可选的，所述液晶分子的液晶极性从第二行起，每两行反转一次。
可选的，所述显示面板包括2160行阵列分布的像素显示单元。
可选的，所述像素显示单元为红色像素单元、绿色像素单元以及蓝色像素单元中的任意一种。
本申请实施例还提出了一种显示面板的驱动装置，所述显示面板包括阵列分布的像素显示单元，以及
驱动单元，设置为对所述像素显示单元进行驱动；
第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，其中，x为大于或等于1的整数，m为大于或等于1的整数；
所述驱动装置包括：
时序控制模块，设置为输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
第一充电模块，设置为在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电；
第二充电模块，设置为在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电。
可选的，所述起始扫描信号为所述显示面板上显示一帧画面的起始信号。
可选的，所述起始扫描信号的频率为50-60Hz。
可选的，所述第二充电模块，还设置为将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
可选的，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
可选的，所述第一充电模块，还设置为在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，将第x行的像素驱动单元充电至预设工作电压准位。
可选的，所述液晶分子的液晶极性从第二行起，每两行反转一次。
可选的，所述像素显示单元为红色像素单元、绿色像素单元以及蓝色像素单元中的任意一种。
本申请实施例还提供一种显示面板的驱动方法，所述显示面板包括阵列分布的像素显示单元，以及
驱动单元，设置为对所述像素显示单元进行驱动；
第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，所述液晶分子的液晶极性从第二行起，每两行反转一次，其中，x为大于或等于1的整数，m为大于或等于1的整数；
所述驱动方法包括：
输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
在第x行的像素驱动单元接收到第一个脉冲信号时，将第x行的像素驱动单元充电至第一预设电压准位；
在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
可选的，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
 有益效果
本申请实施例提供一种显示面板的驱动方法及装置，通过输出起始扫描信号，所述起始扫描信号包含两个脉冲信号，在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电，在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电，提升显示面板中的像素驱动单元的充电时间，解决了现有的GOA驱动电路通常具有充电不足的问题，可能会导致显示面板显示异常的问题。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，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，下面描述中的附图是本申请的一些实施例，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为本申请的一个实施例提供的显示面板的驱动方法的流程示意图；
图2为本申请的一个实施例提供的驱动方法在8个时钟周期信号时GOA电路对像素显示单元的扫描时间时序图；
图3为本申请的一个实施例提供的显示面板的驱动装置的模块结构示意图；
图4为本申请的另一个实施例提供的驱动方法的示意图。
 本发明的实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，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，都应当属于本申请保护的范围。
本申请的说明书和权利要求书及上述附图中的术语“包括”以及它们任何变形，意图在于覆盖不排他的包含。例如包含一系列步骤或单元的过程、方法或系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，术语“第一”、“第二”和“第三”等是用于区别不同对象，而非用于描述特定顺序。
显示面板包括阵列分布的像素显示单元，以及用于驱动像素显示单元进行显示的像素驱动单元；在呈阵列排列的像素显示单元中，自第二行起，没两行的像素显示单元的液晶分子的极性反转一次，因此，第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，其中，x为大于或等于1的整数，m为大于或等于1的整数。
图1为本申请实施例提供的一种显示面板的驱动方法的流程示意图。
如图1所示，本实施例中的驱动方法包括：
步骤S10：输出起始扫描信号，所述起始扫描信号包含两个脉冲信号
步骤S20：在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电；
步骤S30：在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电。
在本实施例中，GOA电路在驱动显示面板中的像素驱动单元时，需要接收一个起始扫描信号（STV）和n个时钟周期信号（CLK），例如，图2为8个时钟周期信号时GOA电路对像素显示单元的扫描时间，如图2所示，起始扫描信号在周期信号CK1和周期信号CK5上升沿前开启两次，则显示面板中的每行栅极线（gate line）会开启两次，第一次在周期信号CK1的上升沿开启时为像素驱动单元进行预充电，第二次在周期信号CK5的上升沿开启时为像素驱动单元正式进行充电，当像素驱动单元进行充电完成时，该像素显示单元的数据信号写入，像素驱动单元驱动像素显示单元根据数据信号显示对应的信息。
在一个实施例中，像素驱动单元为薄膜晶体管。液晶显示器中，每个像素具有一个薄膜晶体管，其栅极连接至水平扫描线，漏极连接至垂直方向的数据线，源极则连接至像素电极。当水平扫描线上施加电压达到工作电压时，该线上的所有的薄膜晶体管导通，此时，该水平扫描线上的像素电极会与垂直方向的数据线连接，从而将数据线上的显示信号写入像素，控制不同液晶的透光度进而达到控制色彩的目的。
在一个实施例中，所述起始扫描信号为所述显示面板上显示一帧画面的起始信号。在显示面板中，显示面板包括形成一帧画面的多行像素单元，扫描信号通过像素单元逐行扫描形成完整的一帧画面，该起始扫描信号为一帧画面的起始信号，完成对第一行像素单元的扫描。
在一个实施例中，起始扫描信号的频率为50-60Hz。
在一个实施例中，所述对第x+4m行的像素驱动单元进行预充电，包括：将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
具体的，在第x+4m行的薄膜晶体管进行预充电，达到第x行的薄膜晶体管的栅极的电压准位，该电压准位低于薄膜晶体管的工作电压准位。
在一个实施例中，第一个脉冲信号与第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
在一个实施例中，所述在第x行的像素驱动单元接收到所述起始扫描信号的第一个脉冲信号时，对第x行的像素驱动单元进行预充电，具体包括：在第x行的像素驱动单元接收到所述起始扫描信号的第一个脉冲信号时，将第x行的像素驱动单元充电至第一预设电压准位。该第一预设电压准位为预充电阶段，像素驱动单元的所达到的充电电压。
在一个实施例中，该第一预设电压准位可以根据用户需要进行设置。
在一个实施例中，所述在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，对第x行的像素驱动单元进行充电具体包括：在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，将第x行的像素驱动单元充电至预设工作电压准位，具体的该预设工作电压准位为像素驱动单元驱动像素单元的电压。
在一个实施例中，第x行的像素驱动单元接收到起始扫描信号的第二个脉冲信号时，第x行的薄膜晶体管的栅极的电压达到预设工作电压准位，此时，第x行的薄膜晶体管打开，该行水平扫描线上的像素电极会与垂直方向的数据线连接，从而将数据线上的显示信号电压写入像素，控制不同的液晶的透光度从而达到控制色彩的目的。
在一个实施例中，所述液晶分子的液晶极性从第二行起，每两行反转一次。
在一个实施例中，所述显示面板包括2160行阵列分布的像素显示单元。
在一个实施例中，所述像素显示单元为红色像素单元、绿色像素单元以及蓝色像素单元中的任意一种。
图2为本申请的一个实施例提供的驱动方法在8个时钟周期信号时GOA电路对像素显示单元的扫描时间时序图。
如图2所示，起始扫描信号在周期信号CK1和周期信号CK5上升沿前开启两次，则显示面板中的每行栅极线（gate line）会开启两次，第一次在周期信号CK1的上升沿开启时为像素驱动单元进行预充电，第二次在周期信号CK5的上升沿开启时为像素驱动单元正式进行充电，当像素驱动单元进行充电完成时，该像素显示单元的数据信号写入，像素驱动单元驱动像素显示单元根据数据信号显示对应的信息。
图3为本申请的一个实施例提供的显示面板的驱动装置的模块结构示意图。
本实施例提出了一种显示面板的驱动装置，其中，所述显示面板包括阵列分布的像素显示单元，以及
驱动单元，设置为对所述像素显示单元进行驱动；
第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，其中，x为大于或等于1的整数，m为大于或等于1的整数；
所述驱动装置包括：
时序控制模块10，设置为输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
第一充电模块20，设置为在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电；
第二充电模块30，设置为在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电。
在一个实施例中，时序控制模块10输出一个起始扫描信号（STV）和n个时钟周期信号（CLK），例如，如图2所示，起始扫描信号在周期信号CK1和周期信号CK5上升沿前开启两次，则显示面板中的每行栅极线（gate line）会开启两次，第一次在周期信号CK1的上升沿开启时为像素驱动单元进行预充电，第二次在周期信号CK5的上升沿开启时为像素驱动单元正式进行充电，当像素驱动单元进行充电完成时，该像素显示单元的数据信号写入，像素驱动单元驱动像素显示单元根据数据信号显示对应的信息。
在一个实施例中，所述起始扫描信号为所述显示面板上显示一帧画面的起始信号。
在一个实施例中，所述起始扫描信号的频率为50-60Hz。
在一个实施例中，所述第二充电模块30，还设置为将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
在一个实施例中，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
在一个实施例中，所述第一充电模块20，还设置为在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，将第x行的像素驱动单元充电至预设工作电压准位。
在一个实施例中，第x行的像素驱动单元接收到起始扫描信号的第二个脉冲信号时，第x行的薄膜晶体管的栅极的电压达到预设工作电压准位，此时，第x行的薄膜晶体管打开，该行水平扫描线上的像素电极会与垂直方向的数据线连接，从而将数据线上的显示信号电压写入像素，控制不同的液晶的透光度从而达到控制色彩的目的。
在一个实施例中，所述液晶分子的液晶极性从第二行起，每两行反转一次。
在一个实施例中，所述像素显示单元为红色像素单元、绿色像素单元以及蓝色像素单元中的任意一种。
图4为本申请的另一个实施例提供的驱动方法的示意图。
在本实施例中，所述显示面板包括阵列分布的像素显示单元，以及
驱动单元，设置为对所述像素显示单元进行驱动；
第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，所述液晶分子的液晶极性从第二行起，每两行反转一次，其中，x为大于或等于1的整数，m为大于或等于1的整数；
如图4所示，本实施例中的驱动方法包括：
步骤S41：输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
步骤S42：在第x行的像素驱动单元接收到第一个脉冲信号时，将第x行的像素驱动单元充电至第一预设电压准位；
步骤S43：在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
在一个实施例中，GOA电路在驱动显示面板中的像素驱动单元时，需要接收一个起始扫描信号（STV）和n个时钟周期信号（CLK），例如，图2为8个时钟周期信号时GOA电路对像素显示单元的扫描时间，如图2所示，起始扫描信号在周期信号CK1和周期信号CK5上升沿前开启两次，则显示面板中的每行栅极线（gate line）会开启两次，第一次在周期信号CK1的上升沿开启时为像素驱动单元进行预充电，第二次在周期信号CK5的上升沿开启时为像素驱动单元正式进行充电，当像素驱动单元进行充电完成时，该像素显示单元的数据信号写入，像素驱动单元驱动像素显示单元根据数据信号显示对应的信息。
在一个实施例中，像素驱动单元为薄膜晶体管。液晶显示器中，每个像素具有一个薄膜晶体管，其栅极连接至水平扫描线，漏极连接至垂直方向的数据线，源极则连接至像素电极。当水平扫描线上施加电压达到工作电压时，该线上的所有的薄膜晶体管导通，此时，该水平扫描线上的像素电极会与垂直方向的数据线连接，从而将数据线上的显示信号写入像素，控制不同液晶的透光度进而达到控制色彩的目的。
在一个实施例中，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
本申请实施例装置中的单元可以根据实际需要进行合并、划分和删减。
本申请实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（Read-Only Memory，ROM）或随机存储记忆体（Random Access Memory，RAM）等。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种显示面板的驱动方法，其中，所述显示面板包括阵列分布的像素显示单元，以及
    驱动单元，设置为对所述像素显示单元进行驱动；
    第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，其中，x为大于或等于1的整数，m为大于或等于1的整数；
    所述驱动方法包括：
    输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
    在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电；
    在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电。
  2. 如权利要求1所述的驱动方法，其中，所述起始扫描信号为所述显示面板上显示一帧画面的起始信号。
  3. 如权利要求2所述的驱动方法，其中，所述起始扫描信号的频率为50-60Hz。
  4. 如权利要求1所述的驱动方法，其中，所述对第x+4m行的像素驱动单元进行预充电，包括：
    将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
  5. 如权利要求1所述的驱动方法，其中，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
  6. 如权利要求1所述的驱动方法，其中，所述在第x行的像素驱动单元接收到所述起始扫描信号的第一个脉冲信号时，对第x行的像素驱动单元进行预充电，具体包括：
    在第x行的像素驱动单元接收到所述起始扫描信号的第一个脉冲信号时，将第x行的像素驱动单元充电至第一预设电压准位。
  7. 如权利要求1所述的驱动方法，其中，所述在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，对第x行的像素驱动单元进行充电，包括：
    在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，将第x行的像素驱动单元充电至预设工作电压准位。
  8. 如权利要求1所述的驱动方法，其中，所述液晶分子的液晶极性从第二行起，每两行反转一次。
  9. 如权利要求1所述的驱动方法，其中，所述显示面板包括2160行阵列分布的像素显示单元。
  10. 如权利要求8所述的驱动方法，其中，所述像素显示单元为红色像素单元、绿色像素单元以及蓝色像素单元中的任意一种。
  11. 一种显示面板的驱动装置，其中，所述显示面板包括阵列分布的像素显示单元，以及
    驱动单元，设置为对所述像素显示单元进行驱动；
    第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，其中，x为大于或等于1的整数，m为大于或等于1的整数；
    所述驱动装置包括：
    时序控制模块，设置为输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
    第一充电模块，设置为在第x行的像素驱动单元接收到第一个脉冲信号时，对第x行的像素驱动单元进行预充电；
    第二充电模块，设置为在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，对第x+4m行的像素驱动单元进行预充电。
  12. 如权利要求11所述的驱动装置，其中，所述起始扫描信号为所述显示面板上显示一帧画面的起始信号。
  13. 如权利要求12所述的驱动装置，其中，所述起始扫描信号的频率为50-60Hz。
  14. 如权利要求11所述的驱动装置，其中，所述第二充电模块，还设置为将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
  15. 如权利要求11所述的驱动装置，其中，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
  16. 如权利要求11所述的驱动装置，其中，所述第一充电模块，还设置为在第x行的像素驱动单元接收到所述起始扫描信号的第二个脉冲信号时，将第x行的像素驱动单元充电至预设工作电压准位。
  17. 如权利要求11所述的驱动装置，其中，所述液晶分子的液晶极性从第二行起，每两行反转一次。
  18. 如权利要求11所述的驱动装置，其中，所述像素显示单元为红色像素单元、绿色像素单元以及蓝色像素单元中的任意一种。
  19. 一种显示面板的驱动方法，其中，所述显示面板包括阵列分布的像素显示单元，以及
    驱动单元，设置为对所述像素显示单元进行驱动；
    第x行液晶分子的液晶极性与第x+4m行液晶分子的液晶极性相同，所述液晶分子的液晶极性从第二行起，每两行反转一次，其中，x为大于或等于1的整数，m为大于或等于1的整数；
    所述驱动方法包括：
    输出起始扫描信号，所述起始扫描信号包含两个脉冲信号；
    在第x行的像素驱动单元接收到第一个脉冲信号时，将第x行的像素驱动单元充电至第一预设电压准位；
    在第x行的像素驱动单元接收到第二个脉冲信号时，对第x行的像素驱动单元进行充电，并对第x行的像素驱动单元进行数据写入，同时，将第x+4m行的像素驱动单元预充电至第x行的像素驱动单元的电压准位。
  20. 如权利要求19所述的驱动装置，其中，所述第一个脉冲信号与所述第二个脉冲信号之间间隔4n个时钟周期,n为大于或等于1的整数。
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