WO2020248970A1 - 显示面板的驱动方法和驱动电路 - Google Patents

显示面板的驱动方法和驱动电路 Download PDF

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Publication number
WO2020248970A1
WO2020248970A1 PCT/CN2020/095089 CN2020095089W WO2020248970A1 WO 2020248970 A1 WO2020248970 A1 WO 2020248970A1 CN 2020095089 W CN2020095089 W CN 2020095089W WO 2020248970 A1 WO2020248970 A1 WO 2020248970A1
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WIPO (PCT)
Prior art keywords
display panel
switch
common
line
voltage
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Ceased
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PCT/CN2020/095089
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English (en)
French (fr)
Inventor
周满城
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
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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Priority to US17/297,443 priority Critical patent/US11482186B2/en
Publication of WO2020248970A1 publication Critical patent/WO2020248970A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/026—Arrangements or methods related to booting a display

Definitions

  • the present application relates to the field of display technology, and in particular to a driving method and driving circuit of a display panel.
  • Liquid crystal displays especially Thin Film Transistor-Liquid Crystal Display (TFT-LCD) have become more and more widely used due to their advantages of lightness, thinness and portability.
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display
  • existing liquid crystal displays may have screens during use. The flicker phenomenon affects the display quality of the liquid crystal display.
  • the common voltage will reach the reference voltage in a short time, and the source drive needs to be reset, and the source drive voltage is 0V.
  • the gate drive is turned on, there will be voltage across the LCD. Poor, there will be flash problems, which affects people’s viewing experience.
  • the purpose of the present application is to provide a driving method and a driving circuit for reducing the flicker of the display panel when starting.
  • the present application provides a driving method of a display panel.
  • the driving method includes the steps:
  • the source driving circuit of the display panel is activated to output an OV voltage, and at the same time, the common line of the display panel is outputted or disconnected;
  • the source driving circuit of the display panel outputs a predetermined initial voltage, and at the same time the common line of the display panel outputs the same initial voltage;
  • the gray-scale voltage is transmitted to the display panel; at the same time, the gamma circuit that controls the display panel outputs a preset common voltage to the common line through the common voltage line .
  • the present application also discloses a driving circuit for a display panel, including a source driving circuit for providing a driving voltage for the display panel, a gamma circuit for providing a common voltage for the display panel, a first switch, a second switch, and a second switch.
  • the gamma circuit outputs a predetermined common voltage to the common line through the common voltage line; and a detection circuit that detects the source drive circuit and controls the connection to the second Switch and a third switch; wherein the output terminal of the source drive circuit is connected to the control terminal of the first switch; the output terminal of the second switch is connected to the input terminal of the first switch; The output terminal of the horse circuit is connected to the input terminal of the second switch and the input terminal of the third switch; the detection circuit controls the control terminals connected to the second switch and the third switch respectively; The output terminals of a switch and a third switch are respectively connected to the common line of the display panel; the source drive circuit of the display panel is activated to output an OV voltage, the first switch remains closed, and the detection circuit is activated When it is initialized to control the second switch and the third switch to remain on, the gamma circuit outputs an OV voltage to the common line through the common voltage line; the detection circuit outputs a voltage after the source drive circuit is activated
  • the first switch is turned on, the second switch is kept on, while the third switch is kept off, and the same voltage as the initial voltage is output to the common line; and at the source
  • the second switch is controlled to be kept closed, while the third switch is kept on, and the gamma circuit outputs a preset common voltage to the common line.
  • the present application also discloses a driving circuit for a display panel, including a source driving circuit for providing a driving voltage for the display panel, a gamma circuit for providing a common voltage for the display panel, a first switch, a second switch, and a second switch.
  • the gamma circuit outputs a predetermined common voltage to the common line through the common voltage line; and a detection circuit that detects the source drive circuit and controls the connection to the second Switch and a third switch; wherein the output terminal of the source drive circuit is connected to the control terminal of the first switch and the input terminal of the second switch; the output terminal of the second switch is connected to the first switch The input terminal of a switch; the input terminal of the third switch is connected with the output terminal of the gamma circuit; the detection circuit respectively controls and connects the control terminals of the second switch and the third switch; The output terminals of the first switch and the third switch are respectively connected to the common line of the display panel; when the detection circuit is started, it is initialized to control the third switch to keep on, and the gamma circuit passes the common voltage The line outputs OV voltage to the common line; when the detection circuit outputs a predetermined initial voltage after the source drive circuit is started, the second switch is kept on and the third switch is kept off at the same time
  • the source drive circuit After the display panel is turned on, the source drive circuit will start output in three stages: 0V, the predetermined initial voltage, and the gray-scale voltage after the start is completed.
  • the output of this application is the same as the source drive circuit output in the first two stages.
  • the common voltage and the source driving voltage of the control display panel are the same when the display panel is turned on, so that the pressure difference between the LCD on the front panel when the screen data is input is close to zero, avoiding the flashing problem at the time of power-on, and improving the product quality , Increase people's visual experience.
  • Figure 1 is a schematic diagram of a flashing problem on a display panel
  • FIG. 2 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a driving circuit of a display panel according to another embodiment of the present application.
  • FIG. 4 is a schematic diagram of a driving circuit of a display panel according to another embodiment of the present application.
  • FIG. 5 is a schematic diagram of the first switch integrated on the substrate according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of the first switch integrated in the driving circuit board according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of voltage waveforms according to an embodiment of the present application.
  • first and second may explicitly or implicitly include the features of one or more levels.
  • multi-level means two levels or more.
  • the term “including” and any variations thereof is intended to cover non-exclusive inclusion.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of the two-stage components.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of the two-stage components.
  • the present application discloses a driving method of a display panel, and the driving method includes the steps:
  • S2 the first stage: the source driving circuit of the display panel is activated, and the OV voltage is output, and at the same time, the common line of the display panel is outputted or disconnected;
  • S3 the second stage: the source driving circuit of the display panel outputs a predetermined initial voltage, and at the same time, the common line of the display panel outputs the same initial voltage;
  • S4 Normal display stage: After the source driving circuit of the display panel is started, the gray-scale voltage is transmitted to the display panel; at the same time, the gamma circuit that controls the display panel outputs a preset value through the common voltage line 270 Common voltage to the common line.
  • the source drive circuit of the display panel is started.
  • the first stage of the gate drive circuit starting up. Since the source drive circuit needs to be reset, the output voltage is 0V, and the gamma circuit
  • the 0V voltage delivered to the common line makes the voltage across the liquid crystal in the panel consistent; when the output voltage of the source drive circuit continues to rise to reach the preset initial voltage (for example, the initial voltage after starting work is preset to 7V), at this time It is the second stage of starting the gate drive circuit, and at the same time outputting the same initial voltage to the common line.
  • the preset initial voltage for example, the initial voltage after starting work is preset to 7V
  • the timing controller (refer to Figure 3) outputs the grayscale voltage to the source drive circuit, and finally transmits the grayscale voltage to the display panel through the source drive circuit, and the gamma circuit outputs a preset Common voltage (such as 0V, 1V or even 7V, etc.) to the common line, control the display panel to display normally.
  • a preset Common voltage such as 0V, 1V or even 7V, etc.
  • the first switch connected to the first common voltage line is controlled to remain closed, and the first common voltage line is closed;
  • the third switch connected to the second common voltage line is controlled to remain on and conduct
  • the second common voltage line is connected to make the common line of the display panel output 0V voltage; of course, the first common voltage line and the second common voltage line can also be disconnected at the same time, and the common voltage line is disconnected from the display panel common line, so that The voltage on the common line is also 0V, which is consistent with the output voltage of the source drive circuit;
  • the common voltage input to the common line is controlled by the first common voltage line and the second common voltage line respectively.
  • the first common line and the second common line cooperate with each other to turn off and conduct, and provide the common line corresponding to the gate drive circuit. It is ensured that the voltage on the common line corresponds to the voltage in the first stage and the second stage when the gate drive circuit is turned on.
  • other components can also be used to control the closing or conducting of the first common voltage line or the second common voltage line.
  • the gate driving circuit when the gate driving circuit is started up, the first stage is completed after the completion of the step M: the detection circuit of the display panel starts timing, and when the preset time is reached, the next step is started.
  • the preset time can be set according to different display panels. For example, after one frame time (16.7ms), the first common voltage line can be kept disconnected, and the gamma circuit can provide a preset time through the second common voltage line.
  • the common voltage to the common line ensures that when the display panel is turned on, the voltage on the common line is consistent with the output voltage of the source driving circuit.
  • the detection circuit After the first stage is completed, when the detection circuit detects that the first common voltage line is turned on, it starts to perform the steps of the second stage. More specifically, when the detection circuit detects that there is a current at point P in the first common voltage line, the first common voltage line is now in a conducting state, and the next step is started. When the detection circuit detects that the time has reached the preset After setting the time (such as one frame time), enter the normal display stage.
  • the second common voltage line is turned off, and the first common voltage line is turned on at the same time, and the gamma circuit provides the same voltage as the initial voltage output by the source drive circuit To the common line.
  • the initial voltage output by the source driving circuit it is also possible to directly conduct the initial voltage output by the source driving circuit to the common line.
  • the gamma circuit When the voltage is supplied through the gamma circuit, there is no need to connect other connections, and the gamma circuit is directly used for unified regulation, which facilitates the adjustment of the overall circuit structure; when the initial voltage output by the source drive circuit is directly turned on, it can be guaranteed to be in the second
  • the output voltage of the source drive circuit in the stage is exactly the same as the voltage on the common line, which ensures that the voltage difference between the two ends of the liquid crystal is zero, and effectively avoids the problem of flashing when starting up.
  • the present application also discloses a driving circuit 200 for a display panel, which includes a source driving circuit 210 that provides a driving voltage for the display panel, and a gamma circuit 220 that provides a common voltage for the display panel.
  • the first switch 240, the second switch 250, and the third switch 260 detect the source driving circuit and control the detection circuit 230 connected to the second switch 250 and the third switch 260.
  • the output terminal of the source driving circuit 210 is controlled to connect to the control terminal of the first switch 240; the output terminal of the second switch 250 is connected to the input terminal of the first switch 240; the gamma circuit
  • the output terminal of 220 is connected to the input terminal of the second switch 250 and the input terminal of the third switch 260; the detection circuit 230 is respectively connected to the control terminals of the second switch 250 and the third switch 260
  • the output terminals of the first switch 240 and the third switch 260 are respectively connected to the common line 281 of the display panel.
  • the detection circuit 230 When the detection circuit 230 is activated, it is initialized to control the third switch 260 to maintain conduction; the detection circuit 230 outputs a predetermined initial voltage after the source driving circuit 210 is activated, so that the second The switch 250 is kept on while the third switch 260 is kept off; after the detection circuit 230 has started the source drive circuit 210, the timing controller 300 outputs the gray-scale voltage to the source drive circuit 210, The pole driving circuit 210 transmits the gray-scale voltage to the display panel. At this time, the second switch 250 is controlled to be kept off, and the third switch 260 is kept on at the same time.
  • the source driving circuit 210 starts to enter the first stage, the output terminal of the source driving circuit 210 outputs a voltage of 0V, and the first switch 240 remains closed when the initial low level enters, and the detection circuit In the first stage, 230 is initialized to control the second switch 250 to be turned on and the third switch 260 to be turned on.
  • the first common voltage line 271 is closed, the second common voltage line 272 is turned on, and the gamma circuit 220 outputs a voltage of 0V to the common line 281 through the second common voltage line 272.
  • the source drive circuit 210 When the source drive circuit 210 enters the second stage, the source drive circuit 210 will output a predetermined initial voltage (the same voltage as the initial voltage output by the source drive circuit) as the working voltage (such as 7v) and control the first
  • the switch 240 is turned on, the detection circuit 230 controls the second switch 260 to be turned on, and the third switch 260 is turned off.
  • the first common voltage line 271 is turned on, the second common voltage line 272 is turned off, and the gamma circuit 220 outputs the same initial voltage to the common line 281 through the first common voltage line 271; after the source driving circuit 210 is started, the detection circuit 230 controls the second switch 250 to turn off, and the first The three switches 260 are turned on.
  • the first common voltage line 271 is closed and the second common voltage line 272 is turned on.
  • the gamma circuit 220 is controlled to output a preset common voltage to the common line 281.
  • the common line 281 is located in the circuit of the substrate 280, and the substrate 280 may be a color filter substrate or an array substrate;
  • the common voltage line 270 includes a first common voltage line 271 and a second common voltage line 272, and the input terminal of the first common voltage line 271 is connected to the gamma circuit 220,
  • the output terminal is connected to the common line, the first switch 240 and the second switch 250 control the on and off of the first common voltage line 271;
  • the input terminal of the second common voltage 272 is connected to the all
  • the gamma circuit 220, the output terminal is connected to the common line 281, the third switch 260 controls the on and off of the second common voltage line 272;
  • the source drive circuit 210 of the display panel is activated, and the output OV voltage, the first switch 240 remains closed,
  • the detection circuit 230 is initialized to control the second switch 250 and the third switch 260 to remain on when the detection circuit 230 is activated, and the first common voltage line 271 is closed,
  • the second common voltage line 272 is turned on, and the gamma circuit 220 outputs OV voltage to the common line 281 through the
  • the present application also discloses a driving circuit 200 for a display panel, including a source driving circuit 210 for providing driving voltage for the display panel, a first switch 240, a second switch 250, and a third switch 260. Detect the source driving circuit 210 and control the detection circuit 230 connected to the second switch 250 and the third switch 260.
  • the output terminal of the source driving circuit 210 is controlled to connect the control terminal of the first switch 240 and the input terminal of the second switch 250; the output terminal of the second switch 250 is connected to the first switch 240; the input terminal of the third switch 260 is connected to the output terminal of the gamma circuit 220; the detection circuit 230 controls and connects the control of the second switch 250 and the third switch 260, respectively
  • the output terminals of the first switch 240 and the third switch 260 are respectively connected to the common line 281 of the display panel; when the detection circuit 230 is activated, it is initialized to control the third switch 260 to keep conducting; When the detection circuit 230 outputs a predetermined initial voltage after the source driving circuit 210 is activated, the second switch 250 is kept on while the third switch 260 is kept off; and the source driving circuit After the startup of 210 is completed, the timing controller 300 outputs the gray-scale voltage to the source driving circuit 210, and the gray-scale voltage is transmitted to the display panel through the source driving circuit 210.
  • the second switch 250 is controlled to remain closed, while the third switch 260 is kept on; when the initial voltage output by the source drive circuit 210 is directly turned on, the output of the source drive circuit 210 in the second stage can be guaranteed
  • the voltage is exactly the same as the voltage on the common line 281, which ensures that the voltage difference between the two ends of the liquid crystal is zero, which effectively avoids the problem of flashing at startup.
  • this circuit directly connects the output terminal of the source driver circuit 210 to the input terminal of the second switch 250.
  • the first The first switch 240 and the second switch 250 are kept on, and the third switch 260 is kept off, directly inputting the voltage of the source driving circuit 210 to the common line 281, ensuring that the voltage across the liquid crystal is completely consistent.
  • the common voltage line 270 includes a first common voltage line 271 and a second common voltage line 272.
  • the input terminal of the first common voltage line 271 is connected to the gamma circuit 220, and the output terminal is connected to On the common line 281, the first switch 240 and the second switch 250 control the on and off of the first common voltage line 271; the input end of the second common voltage line 272 is connected to the The gamma circuit 220, the output terminal is connected to the common line 281, the third switch 260 controls the on and off of the second common voltage line 272; the detection circuit 230 is initialized to control the The third switch 260 remains turned on, the first common voltage line 271 is turned off, the second common voltage line 272 is turned on, and the gamma circuit outputs an OV voltage to the common line 281 through the second common voltage line 272.
  • the first switch 240 is integrated in the gamma circuit 220, and the first switch 240 is designed to be more integrated in the gamma circuit 220.
  • the first switch 240 can also be integrated in the substrate 280 of the display panel or the drive circuit board 110 of the display panel. The designer can adjust the first switch 240 according to their actual needs. position.
  • the source voltage Sout of the source driving circuit in the first stage and the common line are common
  • the voltage Vcom is 0V at this time; in the second stage, the source voltage Sout of the source drive circuit and the common voltage Vcom on the common line both increase the same, and the voltage difference between the two approaches zero;
  • the source voltage Sout of the source driving circuit is the gray-scale voltage normally displayed by the display panel, and the common voltage Vcom on the common line remains unchanged at the preset common voltage.
  • the technical solution of the present invention can be widely used in various display panels, such as Twisted Nematic (TN) display panels, In-Plane Switching (IPS) display panels, and Vertical Alignment (VA) ) Display panel, Multi-Domain Vertical Alignment (MVA) display panel, of course, it can also be other types of display panel, such as Organic Light-Emitting Diode (OLED) display panel.
  • TN Twisted Nematic
  • IPS In-Plane Switching
  • VA Vertical Alignment
  • MVA Multi-Domain Vertical Alignment
  • OLED Organic Light-Emitting Diode

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

Abstract

公开了一种显示面板的驱动方法和驱动电路。该驱动方法包括步骤：源极驱动电路(210)启动，输出OV电压，同时使共通线(281)输出0V电压或断开；源极驱动电路(210)输出一预定的初始电压，同时使共通线(281)输出同样的初始电压；源极驱动电路(210)启动完成后，传送灰阶电压至显示面板(210)；同时，控制显示面板(210)的伽马电路(220)通过公共电压线(270)输出一预设的公共电压到共通线(281)。

Description

显示面板的驱动方法和驱动电路
本申请要求于2019年6月11日提交中国专利局，申请号为CN201910500017.6，申请名称为“一种显示面板的驱动方法和驱动电路”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板的驱动方法和驱动电路。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术；
液晶显示器，特别是薄膜晶体管液晶显示器(Thin FilmTransistor-Liquid Crystal Display，TFT-LCD)由于其轻薄、携带方便等优点，得到了越来越广泛的应用，但是现有液晶显示器在使用中可能发生画面闪烁现象，影响了液晶显示器的显示品质。
在TFT-LCD上电后，公共电压会在很短时间内到达基准电压，而源极驱动因为需要复位，源极驱动电压值为0V，此时如果栅极驱动打开会造成液晶两端存在压差，会出现闪现问题，影响了人们的观看体验。
发明内容
本申请的目的是提供一种减轻开机时闪现的显示面板的驱动方法和驱动电路。
本申请提供了一种显示面板的驱动方法，所述驱动方法包括步骤：
使显示面板开机；
所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开；
所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压；
所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制所述显示面板的伽马电路通过公共电压线输出一预设的公共电压到所述共通线。
本申请还公开了一种显示面板的驱动电路，包括为所述显示面板提供驱动电压的源极驱动电路，为所述显示面板提供公共电压的伽马电路，第一开关、第二开关、第三开关、公共电压线，所述伽马电路通过公共电压线输出一预设的公共电压到所述共通线；以及侦测电路，侦测所述源极驱动电路，并控制连接所述第二开关和第三开关；其中，所述源极驱动电路的 输出端控制连接所述第一开关的控制端；所述第二开关的输出端连接到所述第一开关的输入端；所述伽马电路的输出端连接所述第二开关的输入端与所述第三开关的输入端；所述侦测电路分别控制连接所述第二开关和所述第三开关的控制端；所述第一开关和第三开关的输出端分别连接到所述显示面板的共通线；所述显示面板的源极驱动电路启动，输出OV电压，所述第一开关保持关闭，所述侦测电路在启动时，初始化为控制所述第二开关和第三开关保持导通，所述伽马电路通过公共电压线给共通线输出OV电压；所述侦测电路在所述源极驱动电路启动后输出一预定的初始电压时，使所述第一开关导通，第二开关保持导通，同时使第三开关保持关闭，将与初始电压相同的电压输出到所述共通线；并在所述源极驱动电路启动完成，输出灰阶电压时，控制所述第二开关保持关闭，同时使第三开关保持导通，所述伽马电路输出一预设的公共电压到所述共通线。
本申请还公开了一种显示面板的驱动电路，包括为所述显示面板提供驱动电压的源极驱动电路，为所述显示面板提供公共电压的伽马电路，第一开关、第二开关、第三开关、公共电压线，所述伽马电路通过公共电压线输出一预设的公共电压到所述共通线；以及侦测电路，侦测所述源极驱动电路，并控制连接所述第二开关和第三开关；其中，所述源极驱动电路的输出端控制连接所述第一开关的控制端与所述第二开关的输入端；所述第二开关的输出端连接到所述第一开关的输入端；所述第三开关的输入端与所述伽马电路的输出端连接；所述侦测电路分别控制连接所述第二开关和所述第三开关的控制端；所述第一开关和第三开关的输出端分别连接到所述显示面板的共通线；所述侦测电路在启动时，初始化为控制所述第三开关保持导通，所述伽马电路通过公共电压线给共通线输出OV电压；所述侦测电路在所述源极驱动电路启动后输出一预定的初始电压时，使第二开关保持导通，同时使第三开关保持关闭，将初始电压导通到所述共通线；并在所述源极驱动电路启动完成，输出灰阶电压时，控制所述第二开关保持关闭，同时使第三开关保持导通。
显示面板开机后，源极驱动电路启动会分三个阶段输出：0V、预定的初始电压、和启动完成后的灰阶电压，本申请在这前两个阶段输出与源极驱动电路输出相同的电压到共通线，控制显示面板开机时公共电压和源极驱动电压保持一致，使有画面数据输入前面板液晶间的压差趋近于零，避免了开机时刻出现的闪现问题，提高了产品品质，增加了人们视觉体验。
附图说明
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅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 性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是显示面板出现闪现问题的示意图；
图2是本申请一实施例一种显示面板的驱动方法流程示意图；
图3是本申请另一实施例一种显示面板的驱动电路示意图；
图4是本申请另一实施例一种显示面板的驱动电路示意图；
图5是本申请一实施例第一开关集成于基板的示意图；
图6是本申请一实施例第一开关集成于驱动电路板的示意图；
图7是本申请一实施例电压波形示意图。
具体实施方式
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用于描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。
在本申请的描述中，需要理解的是，术语“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一级或者更多级该特征。在本申请的描述中，除非另有说明，“多级”的含义是两级或两级以上。另外，术语“包括”及其任何变形，意图在于覆盖不排他的包含。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两级元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
这里所使用的术语仅仅是为了描述具体实施例而不意图限制示例性实施例。除非上下文明确地另有所指，否则这里所使用的单数形式“一级”、“一项”还意图包括复数。还应当理解的是，这里所使用的术语“包括”和/或“包含”规定所陈述的特征、整数、步骤、操作、单元和/或组件的存在，而不排除存在或添加一级或更多其他特征、整数、步骤、操作、单元、组件和/或其组合。
下面参考附图和可选的实施例对本申请作进一步说明。
参考图1，在显示面板100中开机时，公共电压会在很短时间内到达基准电压，而源极驱动电路210因为需要复位，源极驱动电路210电压值为0V，此时如果栅极驱动打开会造成液晶两端存在压差，会出现闪现120问题。
参考图2，本申请公开了一种显示面板的驱动方法，所述驱动方法包括步骤：
S1:使显示面板开机；
S2:第一阶段：所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开；
S3:第二阶段：所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压；
S4:正常显示阶段：所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制所述显示面板的伽马电路通过公共电压线270输出一预设的公共电压到所述共通线。
显示面板在开机启动时，显示面板的源极驱动电路启动，这里是栅极驱动电路开机启动的第一阶段，由于源极驱动电路需要复位，开始输出的电压为0V，此时通过伽马电路传递到共通线0V的电压，使面板中液晶两端的电压一致；当源极驱动电路的输出电压不断上升达到预设的初始电压(如开始工作后的初始电压预设为7V)时，此时为栅极驱动电路开机启动的第二阶段，同时给共通线输出同样的初始电压。直至源极驱动电路启动完成后，时序控制器(参考图3)输出灰阶电压至源极驱动电路，最终通过源极驱动电路将灰阶电压传送至显示面板，同时伽马电路输出预设的公共电压(如0V、1V甚至7V等)到共通线，控制显示面板正常显示。通过在第一阶段和第二阶段分别对共通线接入对应的电压，保证液晶两端的压差趋近于零，避免了开机时出现的闪现问题。
具体的，在第一阶段中：控制连接在第一公共电压线上的第一开关保持关闭，关闭第一公共电压线；控制连接在第二公共电压线上的第三开关保持导通，导通第二公共电压线，使所述显示面板的共通线输出0V电压；当然也可以同时断开第一公共电压线和第二公共电压线，断开公共电压线与显示面板共通线连接，使共通线上的电压也是0V，与源极驱动电路的输出电压一致；
在第二阶段中：控制连接在第一公共电压线上的第一开关和第二开关保持导通，导通第一公共电压线；控制连接在第二公共电压线上的第三开关保持关闭，关闭第二公共电压线，使所述显示面板的共通线输出同样的所述初始电压；
在正常显示阶段中：控制连接在第一公共电压线上的控制第二开关保持关闭，关闭第一公共电压线；控制连接在第二公共电压线上的第三开关保持导通第二公共电压线，给所述显示面板的共通线输出一预设的公共电压。
输入到共通线的公共电压分别由第一公共电压线控制和第二公共电压线控制，第一公共线和第二公共线之间配合关闭导通，为共通线提供与栅极驱动电路相对应的电压，保证了共通线上的电压分别与栅极驱动电路开机启动时第一阶段和第二阶段的电压对应。当然，也可以使用其他元件控制第一公共电压线或第二公共电压线的关闭或导通。
更具体的，栅极驱动电路开机启动时第一阶段完成后还包括步骤M：所述显示面板的侦测电路开始计时，当达到预设时间后，开始执行下一步骤。预设时间可以根据不同的显示面板设置不同的时间，比如可以经过一帧时间(16.7ms)后，使第一公共电压线保持断开，伽马电路通过第二公共电压线提供一预设的公共电压到所述共通线，保证了显示面板开机时，共通线上的电压与源极驱动电路的输出电压一致。
在第一阶段完成后，侦测电路检测到第一公共电压线导通时，开始执行第二阶段的步骤。更具体的，当侦测电路检测到第一公共电压线中P点存在电流时，此时第一公共电压线处于导通状态，开始执行下一步骤，当侦测电路侦测到时间到达预设时间(如一帧时间)后，进入正常显示阶段。
在栅极驱动电路开机启动的第二阶段时，关闭第二公共电压线，同时导通第一公共电压线，通过所述伽马电路提供与所述源极驱动电路输出的初始电压相同的电压到所述共通线。当然，也可以将所述源极驱动电路输出的初始电压直接导通到所述共通线。以上两种不同的提供输出电压的方式，对应两种不同的电路连接，都可以实现对液晶两端电压的调控。当通过伽马电路提供电压时，无需外接其他连线，直接通过伽马电路统一调控，方便整体电路结构的调整；当通过源极驱动电路输出的初始电压直接导通时，可以保证在第二阶段源极驱动电路的输出电压和共通线上的电压完全一致，保证了液晶两端电压压差为零，有效的避免了开机闪现的问题。
参考图3所示，本申请还公开了一种显示面板的驱动电路200，包括为所述显示面板提供驱动电压的源极驱动电路210，为所述显示面板提供公共电压的伽马电路220，第一开关240、第二开关250、以及第三开关260，侦测所述源极驱动电路并控制连接所述第二开关250和第三开关260的侦测电路230。其中，所述源极驱动电路210的输出端控制连接所述第一开关240的控制端；所述第二开关250的输出端连接到所述第一开关240的输入端；所述伽马电路220的输出端连接所述第二开关250的输入端与所述第三开关260的输入端；所述侦测电路230分别控制连接所述第二开关250和所述第三开关260的控制端；所述第一开关240和第三开关260的输出端分别连接到所述显示面板的共通线281。所述侦测电路230在启动时，初始化为控制所述第三开关260保持导通；所述侦测电路230在所述源极驱动电路210启动后输出一预定的初始电压时，使第二开关250保持导通，同时使第三开关260保持关闭；所述侦测电路230在所述源极驱动电路210启动完成后，时序控制器300输出灰阶 电压至源极驱动电路210，通过源极驱动电路210将灰阶电压传送至显示面板。此时控制所述第二开关250保持关闭，同时使第三开关260保持导通。
在显示面板开机时，源极驱动电路210启动进入第一阶段，源极驱动电路210的输出端输出0V电压，同时第一开关240由于在开始的低电平进入时保持关闭状态，侦测电路230在第一阶段时初始化为控制所述第二开关250导通，所述第三开关260导通，此时第一公共电压线271处于关闭，第二公共电压线272导通，伽马电路220通过第二公共电压线272给共通线281输出0V电压。源极驱动电路210进入第二阶段时，源极驱动电路210会输出一预定的初始电压(与所述源极驱动电路输出的初始电压相同的电压)作为工作电压(如7v)并控制第一开关240导通，侦测电路230控制所述第二开关260导通，第三开关260关闭，此时第一公共电压线271处于导通，第二公共电压线272关闭，所述伽马电路220通过第一公共电压线271给所述共通线281输出同样的所述初始电压；所述源极驱动电路210启动完成后，侦测电路230控制所述第二开关250断开，所述第三开关260打开，此时第一公共电压线271处于关闭，第二公共电压线272导通，同时，控制伽马电路220输出一预设的公共电压到所述共通线281。其中，共通线281位于基板280电路中，该基板280可以是彩膜基板也可以是阵列基板；
具体的，如图3，其中，所述公共电压线270包括第一公共电压线271和第二公共电压线272，所述第一公共电压线271的输入端连接于所述伽马电路220，输出端连接于所述共通线，所述第一开关240和第二开关250控制所述第一公共电压线271的导通和关闭；所述第二公共电压272的输入端连接于所述所述伽马电路220，输出端连接于所述共通线281，所述第三开关260控制所述第二公共电压线272的导通和关闭；所述显示面板的源极驱动电路210启动，输出OV电压，所述第一开关240保持关闭，所述侦测电路230在启动时，初始化为控制所述第二开关250和第三开关260保持导通，所述第一公共电压线271关闭，所述第二公共电压线272导通，所述伽马电路220通过第二公共电压线272给共通线281输出OV电压；通过伽马电路220提供电压时，无需外接其他连线，直接通过伽马电路220统一调控，方便整体电路结构的调整。
当然还可以通过在第二阶段时还可以通过源极驱动电路210直接将初始电压通过第一公共电压线271导通到所述共通线281。参考图4所示，本申请还公开了一种显示面板的驱动电路200，包括为所述显示面板提供驱动电压的源极驱动电路210，第一开关240、第二开关250、以及第三开关260，侦测所述源极驱动电路210并控制连接所述第二开关250和第三开关260的侦测电路230。其中，所述源极驱动电路210的输出端控制连接所述第一开关240的控制端与所述第二开关250的输入端；所述第二开关250的输出端连接到所述第一开关240的输入端；所述第三开关260的输入端与所述伽马电路220的输出端连接；所述侦 测电路230分别控制连接所述第二开关250和所述第三开关260的控制端；所述第一开关240和第三开关260的输出端分别连接到所述显示面板的共通线281；所述侦测电路230启动时，初始化为控制所述第三开关260保持导通；所述侦测电路230在所述源极驱动电路210启动后输出一预定的初始电压时，使第二开关250保持导通，同时使第三开关260保持关闭；并在所述源极驱动电路210启动完成后，时序控制器300输出灰阶电压至源极驱动电路210，通过源极驱动电路210将灰阶电压传送至显示面板。此时控制所述第二开关250保持关闭，同时使第三开关260保持导通；通过源极驱动电路210输出的初始电压直接导通时，可以保证在第二阶段源极驱动电路210的输出电压和共通线上281的电压完全一致，保证了液晶两端电压压差为零，有效的避免了开机闪现的问题。
与伽马电路220提供第二阶段的的初始电压到共同通线不同的是，本电路直接将源极驱动电路210的输出端连接到第二开关250的输入端，当第二阶段时，第一开关240和第二开关250保持导通，第三开关260保持关闭，直接将源极驱动电路210的电压输入到共通线281上，保证了液晶两端的电压完全一致。
如图4，其中，所述公共电压线270包括第一公共电压线271和第二公共电压线272，所述第一公共电压线271的输入端连接于所述伽马电路220，输出端连接于所述共通线281，所述第一开关240和第二开关250控制所述第一公共电压线271的导通和关闭；所述第二公共电压线272的输入端连接于所述所述伽马电路220，输出端连接于所述共通线281，所述第三开关260控制所述第二公共电压线272的导通和关闭；所述侦测电路230在启动时，初始化为控制所述第三开关260保持导通，所述第一公共电压线271关闭，所述第二公共电压线272导通，所述伽马电路通过第二公共电压线272给共通线281输出OV电压。
具体的，第一开关240集成于伽马电路220中，第一开关240设计在伽马电路220中集成度更高。当然，参考图5和图6所示，第一开关240还可以集成于显示面板的基板280中或所述显示面板的驱动电路板110中，设计人员可以根据自身实际需求调节第一开关240的位置。
参考图7所示，使用本申请的驱动电路和驱动方法后，显示面板开机即图中栅极电压即Gout启动时，在第一阶段源极驱动电路的源极电压Sout和共通线上的公共电压Vcom此时都是0V；第二阶段时，源极驱动电路的源极电压Sout和共通线上的公共电压Vcom都是同样增长，两者之间的压差趋近于零；当正常显示阶段时，源极驱动电路的源极电压Sout为显示面板正常显示的灰阶电压，共通线上的公共电压Vcom仍保持预设的公共电压不变。
需要说明的是，本方案中涉及到的各步骤的限定，在不影响具体方案实施的前提下，并不认定为对步骤先后顺序做出限定，写在前面的步骤可以是在先执行的，也可以是在后执行的，甚至也可以是同时执行的，只要能实施本方案，都应当视为属于本发明的保护范围。
本发明的技术方案可以广泛用于各种显示面板，如扭曲向列型(Twisted Nematic，TN)显示面板、平面转换型(In-Plane Switching，IPS)显示面板、垂直配向型(Vertical Alignment，VA)显示面板、多象限垂直配向型(Multi-Domain Vertical Alignment，MVA)显示面板，当然，也可以是其他类型的显示面板，如有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板，均可适用上述方案。
以上内容是结合具体的可选的实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (19)

  1. 一种显示面板的驱动方法，所述驱动方法包括步骤：
    使显示面板开机；
    所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开；
    所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压；以及
    所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制所述显示面板的伽马电路通过公共电压线输出一预设的公共电压到所述共通线。
  2. 如权利要求1所述的一种显示面板的驱动方法，其中，所述公共电压线包括分别控制的第一公共电压线和第二公共电压线；
    其中，所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开的步骤中：
    关闭第一公共电压线，导通第二公共电压线，使所述显示面板的共通线输出0V电压或断开；
    所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压的步骤中：
    关闭第二公共电压线，同时导通第一公共电压线，使所述显示面板的共通线输出同样的所述初始电压；
    所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制伽马电路通过公共电压线输出一预设的公共电压到所述共通线的步骤中：
    关闭第一公共电压线，导通第二公共电压线，使所述显示面板的共通线输出一预设的公共电压。
  3. 如权利要求2所述的一种显示面板的驱动方法，其中，所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压的步骤中：
    关闭第二公共电压线，同时导通第一公共电压线，通过所述伽马电路提供与所述源极驱动电路输出的初始电压相同的电压到所述共通线。
  4. 如权利要求2所述的一种显示面板的驱动方法，其中，所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压的步骤中：
    关闭第二公共电压线，同时导通第一公共电压线，将所述源极驱动电路输出的初始电压 直接导通到所述共通线。
  5. 如权利要求1所述的一种显示面板的驱动方法，其中，所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开后，还包括以下步骤：
    所述显示面板的侦测电路开始计时，当达到预设时间后，开始执行所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制所述显示面板的伽马电路通过公共电压线输出一预设的公共电压到所述共通线的步骤。
  6. 如权利要求2所述的一种显示面板的驱动方法，其中，所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开的步骤后，仅当所述显示面板的侦测电路检测到第一公共电压线导通时，开始执行所述显示面板的源极驱动电路输出一预定的初始电压，同时给所述显示面板的共通线输出同样的所述初始电压的步骤。
  7. 如权利要求3所述的一种显示面板的驱动方法，其中，所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开的步骤中：
    控制连接在第一公共电压线上的第一开关保持关闭，控制连接在第二公共电压线上的第三开关保持导通，使所述显示面板的共通线输出0V电压；
    所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压的步骤中：
    控制连接在第一公共电压线上的第一开关和第二开关保持导通，控制连接在第二公共电压线上的第三开关保持关闭，通过所述伽马电路提供与所述源极驱动电路输出的初始电压相同的电压到所述共通线；
    所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制伽马电路通过公共电压线输出一预设的公共电压到所述共通线的步骤中：
    控制连接在第一公共电压线上的控制第二开关保持关闭，控制连接在第二公共电压线上的第三开关保持导通，使所述显示面板的共通线输出一预设的公共电压。
  8. 如权利要求4所述的一种显示面板的驱动方法，其中，
    所述显示面板的源极驱动电路启动，输出OV电压，同时使所述显示面板的共通线输出0V电压或断开的步骤中：
    控制连接在第一公共电压线上的第一开关保持关闭，控制连接在第二公共电压线上的第三开关保持导通，使所述显示面板的共通线输出0V电压；
    所述显示面板的源极驱动电路输出一预定的初始电压，同时使所述显示面板的共通线输出同样的所述初始电压的步骤中：
    控制连接在第一公共电压线上的第一开关和第二开关保持导通，控制连接在第二公共电压线上的第三开关保持关闭，将所述源极驱动电路输出的初始电压直接导通到所述共通线；
    所述显示面板的源极驱动电路启动完成后，传送灰阶电压至所述显示面板；同时，控制伽马电路通过公共电压线输出一预设的公共电压到所述共通线的步骤中：
    控制连接在第一公共电压线上的第二开关保持关闭，控制连接在第二公共电压线上的第三开关保持导通，使所述显示面板的共通线输出一预设的公共电压。
  9. 如权利要求5所述的一种显示面板的驱动方法，其中，所述预设时间设置为一帧时间。
  10. 一种显示面板的驱动电路，包括：
    源极驱动电路，为所述显示面板提供驱动电压；
    伽马电路，为所述显示面板提供公共电压；
    第一开关、第二开关、第三开关；
    公共电压线，所述伽马电路通过公共电压线输出一预设的公共电压到所述共通线；以及
    侦测电路，侦测所述源极驱动电路，并控制连接所述第二开关和第三开关；
    其中，所述源极驱动电路的输出端控制连接所述第一开关的控制端；所述第二开关的输出端连接到所述第一开关的输入端；所述伽马电路的输出端连接所述第二开关的输入端与所述第三开关的输入端；
    所述侦测电路分别控制连接所述第二开关和所述第三开关的控制端；
    所述第一开关和第三开关的输出端分别连接到所述显示面板的共通线；
    所述显示面板的源极驱动电路启动，输出OV电压，所述第一开关保持关闭，所述侦测电路在启动时，初始化为控制所述第二开关和第三开关保持导通，所述伽马电路通过公共电压线给共通线输出OV电压；
    所述侦测电路在所述源极驱动电路启动后输出一预定的初始电压时，使所述第一开关导通，第二开关保持导通，同时使第三开关保持关闭，将与初始电压相同的电压输出到所述共通线；
    并在所述源极驱动电路启动完成，输出灰阶电压时，控制所述第二开关保持关闭，同时使第三开关保持导通，所述伽马电路输出一预设的公共电压到所述共通线。
  11. 如权利要求10所述的一种显示面板的驱动电路，其中，所述公共电压线包括第一公共电压线和第二公共电压线，
    所述第一公共电压线的输入端连接于所述伽马电路，输出端连接于所述共通线，所述第一开关和第二开关控制所述第一公共电压线的导通和关闭；所述第二公共电压的输入端连接于所述所述伽马电路，输出端连接于所述共通线，所述第三开关控制所述第二公共电压线的 导通和关闭；
    所述显示面板的源极驱动电路启动，输出OV电压，所述第一开关保持关闭，所述侦测电路在启动时，初始化为控制所述第二开关和第三开关保持导通，所述第一公共电压线关闭，所述第二公共电压线导通，所述伽马电路通过第二公共电压线给共通线输出OV电压。
  12. 如权利要求11所述的一种显示面板的驱动电路，其中，所述侦测电路在所述源极驱动电路启动后输出一预定的初始电压时，使所述第一开关导通，第二开关保持导通，同时使第三开关保持关闭，通过所述伽马电路提供与所述源极驱动电路输出的初始电压相同的电压通过所述第一公共电压线输出到所述共通线。
  13. 如权利要求10所述的一种显示面板的驱动电路，其中，所述共通线设置在所述显示面板的基板中，所述基板包括彩膜基板或阵列基板。
  14. 如权利要求10所述的一种显示面板的驱动电路，其中，所述第一开关集成于所述伽马电路中。
  15. 如权利要求10所述的一种显示面板的驱动电路，其中，所述第一开关集成于所述显示面板的基板中。
  16. 一种显示面板的驱动电路，包括：
    源极驱动电路，为所述显示面板提供驱动电压；
    伽马电路，为所述显示面板提供公共电压；
    第一开关、第二开关、第三开关；
    公共电压线，所述伽马电路通过公共电压线输出一预设的公共电压到所述共通线；以及
    侦测电路，侦测所述源极驱动电路，并控制连接所述第二开关和第三开关；
    其中，所述源极驱动电路的输出端控制连接所述第一开关的控制端与所述第二开关的输入端；所述第二开关的输出端连接到所述第一开关的输入端；所述第三开关的输入端与所述伽马电路的输出端连接；
    所述侦测电路分别控制连接所述第二开关和所述第三开关的控制端；
    所述第一开关和第三开关的输出端分别连接到所述显示面板的共通线；
    所述侦测电路在启动时，初始化为控制所述第三开关保持导通，所述伽马电路通过公共电压线给共通线输出OV电压；所述侦测电路在所述源极驱动电路启动后输出一预定的初始电压时，使第二开关保持导通，同时使第三开关保持关闭，将初始电压导通到所述共通线；并在所述源极驱动电路启动完成，输出灰阶电压时，控制所述第二开关保持关闭，同时使第三开关保持导通。
  17. 如权利要求16所述的一种显示面板的驱动电路，其中，所述公共电压线包括第一公共电压线和第二公共电压线；
    所述第一公共电压线的输入端连接于所述伽马电路，输出端连接于所述共通线，所述第一开关和第二开关控制所述第一公共电压线的导通和关闭；所述第二公共电压的输入端连接于所述所述伽马电路，输出端连接于所述共通线，所述第三开关控制所述第二公共电压线的导通和关闭；
    所述侦测电路在启动时，初始化为控制所述第三开关保持导通，所述第一公共电压线关闭，所述第二公共电压线导通，所述伽马电路通过第二公共电压线给共通线输出OV电压。
  18. 如权利要求17所述的一种显示面板的驱动电路，其中，所述侦测电路在所述源极驱动电路输出一预定的初始电压，使得所述第二开关保持导通，所述源极驱动电路将初始电压通过第一公共电压线导通到所述共通线。
  19. 如权利要求15所述的一种显示面板的驱动电路，其中，所述第一开关集成于所述显示面板的驱动电路中。
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