WO2017000321A1 - 显示面板及其驱动方法 - Google Patents

显示面板及其驱动方法 Download PDF

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Publication number
WO2017000321A1
WO2017000321A1 PCT/CN2015/083740 CN2015083740W WO2017000321A1 WO 2017000321 A1 WO2017000321 A1 WO 2017000321A1 CN 2015083740 W CN2015083740 W CN 2015083740W WO 2017000321 A1 WO2017000321 A1 WO 2017000321A1
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Prior art keywords
display panel
pixel
pixel electrodes
gate
data line
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PCT/CN2015/083740
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English (en)
French (fr)
Inventor
徐京
黄泰钧
Original Assignee
深圳市华星光电技术有限公司
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Priority to US14/768,694 priority Critical patent/US10403217B2/en
Publication of WO2017000321A1 publication Critical patent/WO2017000321A1/zh

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    • 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
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    • G09G3/22—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 using controlled light sources
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    • 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
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    • 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
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    • 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
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Definitions

  • the present invention relates to the field of display technologies, and in particular, to the field of driving technologies for display panels, and more particularly to a display panel and a driving method thereof.
  • the principle of displaying the screen on the display panel is as follows: the gate driver sequentially drives each gate line to sequentially turn on the TFT (Thin Film Transistor) of the pixel electrode connected to each gate line, and the data driver drives the data line.
  • the display panel controls the deflection of the liquid crystal molecules according to the received gray scale voltage, thereby allowing light of different colors to pass through to display a picture.
  • gamma curve that is, the gray-scale voltage-transmittance curve
  • a Timing Control IC is generally used to apply a Gamma voltage to a pixel electrode corresponding to light of different colors, thereby adjusting a Gamma curve corresponding to light of different colors, for example, including an R for each pixel region.
  • (Red, red) pixel electrode, a G (Green) pixel electrode and a B (Blue, blue) pixel electrode display panel in combination with the gate driver shown in Figure 1 sequentially drive each gate line timing diagram It can be seen that after the data driver applies the Gamma voltage to the three pixel electrodes of one pixel region through one data line, the Gamma voltage can be applied to the three pixel electrodes of the next pixel region through the next data line.
  • embodiments of the present invention provide a display panel and a driving method thereof, which are capable of independently adjusting Gamma voltages applied to pixels of different colors.
  • An embodiment of the present invention provides a display panel including a timing controller, three sets of pixel electrodes respectively allowing light of three colors of red, green, and blue, a gate driver for driving the gate lines, and a driving The data driver of the data line, each set of pixel electrodes allows light of the same color to pass through, and each pixel area of the display panel includes a pixel electrode that allows red light to pass through, a pixel electrode that allows green light to pass through, and a blue allowing The pixel electrode through which the color light passes, each pixel area is connected with a gate line and a data line, and the timing controller controls the data driver to apply the Gamma voltage through the I2C bus or the serial peripheral interface SPI, in the process of displaying one frame of the picture.
  • the data driver applies an independent Gamma voltage to each group of pixel electrodes under the control of the timing controller, and the gate driver sequentially drives the gate lines connected to the group of pixel electrodes under the control of the timing controller, and then drives and then sequentially A set of gate lines connected to pixel electrodes.
  • the display panel further includes three TFTs in each pixel region, the gates of the TFTs are connected to the corresponding gate lines, the drains of the TFTs are connected to the corresponding pixel electrodes, and the sources of the three TFTs are selectively connected to the data lines. When the source of one of the three TFTs is connected to the data line, the other two sources are disconnected from the data line.
  • the display panel further includes a switch tube disposed between each TFT and the data line, and the switch tube is selectively turned on under the control of an enable signal applied to the pixel region, thereby connecting the pixel connected to the source of the TFT.
  • the electrodes are connected to corresponding data lines.
  • Another embodiment of the present invention provides a display panel including a timing controller, a plurality of sets of pixel electrodes, a gate driver for driving the gate lines, and a data driver for driving the data lines, each group of pixel electrodes allowing the same color Light transmission, during the display of one frame, the data driver applies independent Gamma voltage to each group of pixel electrodes under the control of the timing controller, and the gate driver sequentially drives and sets a group of pixel electrodes under the control of the timing controller. After the connected gate lines, the gate lines connected to the next set of pixel electrodes are sequentially driven.
  • the display panel includes three sets of pixel electrodes respectively allowing light of three colors of red, green, and blue to pass through, and each pixel area of the display panel includes a pixel electrode that allows red light to pass through, and one allows green light to pass through.
  • the pixel electrode and a pixel electrode that allows blue light to pass through, each pixel region is connected to a gate line and a data line.
  • the display panel further includes three TFTs in each pixel region, the gates of the TFTs are connected to the corresponding gate lines, the drains of the TFTs are connected to the corresponding pixel electrodes, and the sources of the three TFTs are selectively connected to the data lines. , the source of one of the three TFTs is connected to the data line when the other two The source is disconnected from the data line.
  • the display panel further includes a switch tube disposed between each TFT and the data line, and the switch tube is selectively turned on under the control of an enable signal applied to the pixel region, thereby connecting the pixel connected to the source of the TFT.
  • the electrodes are connected to corresponding data lines.
  • the timing controller controls the data driver to apply the Gamma voltage through an I2C bus or a serial peripheral interface SPI.
  • a further embodiment of the present invention provides a driving method of a display panel, including a timing controller, a plurality of pixel electrodes, a gate driver for driving the gate lines, and a data driver for driving the data lines.
  • the driving method includes dividing a plurality of pixel electrodes into a plurality of groups, each group of pixel electrodes allowing light of the same color to pass through; in a display process of one frame, the data driver controls each group of pixel electrodes under the control of the timing controller A separate Gamma voltage is applied, and the gate driver sequentially drives the gate lines connected to the set of pixel electrodes under the control of the timing controller, and then sequentially drives the gate lines connected to the next group of pixel electrodes.
  • the plurality of pixel electrodes are divided into three groups that allow light of three colors of red, green, and blue to pass through, and each pixel region of the display panel includes a pixel electrode that allows red light to pass through, and one allows green light to pass through.
  • the pixel electrode and a pixel electrode that allows blue light to pass through, each pixel region is connected to a gate line and a data line.
  • the display panel further includes three TFTs in each pixel region, the gates of the TFTs are connected to the corresponding gate lines, the drains of the TFTs are connected to the corresponding pixel electrodes, and the sources of the three TFTs are selectively connected to the data lines. When the source of one of the three TFTs is connected to the data line, the other two sources are disconnected from the data line.
  • a switching tube is disposed between each TFT and the data line, and the switching tube is selectively turned on under the control of an enable signal applied to the pixel region, thereby connecting the pixel electrode connected to the source of the TFT to the corresponding one. Data line.
  • the timing controller controls the data driver to apply the Gamma voltage through an I2C bus or a serial peripheral interface SPI.
  • the display panel and the driving method thereof divide the pixel electrodes of the display panel into a plurality of groups according to the color of the light that is allowed to pass through, that is, each group of pixel electrodes allows light of the same color to pass through, and is in a frame During the display process, a separate Gamma voltage is applied to each group of pixel electrodes by the data driver, and after the gate driver sequentially drives the gate lines connected to a group of pixel electrodes, The gate lines connected to the next set of pixel electrodes are sequentially driven, so that the Gamma voltages applied to the pixels of different colors can be independently adjusted.
  • 1 is a timing diagram of a gate driver driving gate line of the prior art
  • FIG. 2 is a schematic diagram of a pixel structure of an embodiment of a display panel of the present invention.
  • FIG. 3 is a schematic circuit diagram of a pixel area shown in FIG. 2;
  • Fig. 5 is a schematic view showing a driving circuit of an embodiment of the display panel of the present invention.
  • the display panel 10 includes a gate driver 11, data driver 12, a plurality of spaced gate lines G 1, G 2, ..., G n and cross the gate line insulating the data lines D 1 , D 2 ,..., D m , wherein m and n are both positive integers, a plurality of gate lines G 1 , G 2 , . . . , G n and a plurality of data lines D 1 , D 2 ,. . . . , D m defines a plurality of pixel regions 13 of the array of display panels 10 .
  • Each of the pixel regions 13 includes three pixel electrodes R, G, and B that allow light of three colors of red, green, and blue, respectively, and three pixel electrodes R, G, and B are connected to one gate line and one data line. and each time a pixel electrode connected to three R, G, B, only a connection to the corresponding data line, for example, the pixel electrodes R and G pixel electrode connected to the data lines D 1, B data line D 1 is disconnected, The "connection" is an electrical connection.
  • a thin film transistor (ie, T 1 , T 2 , T 3 ) is disposed between the three pixel electrodes R, G, B and the gate line G 1 of the pixel region 13 , wherein the thin film transistor T G 1, G 1, the gate of the thin film transistor T g 1 is the drain connected to the gate line 1 the drain of the thin film transistor T 1 D 1 is connected to the pixel electrodes R, the gate of the thin film transistor T 2, g 2 is connected to the gate line 2 d 2 is connected to the pixel electrode G, the gate g 3 of the thin film transistor T 3 is connected to the gate line G 1 , the drain d 3 of the thin film transistor T 3 is connected to the pixel electrode B, and the sources of the thin film transistors T 1 , T 2 , T 3 s 1 , s 2 , and s 3 are selectively connected to the data line D 1 .
  • a switch tube is further disposed between the pixel electrodes R, G, B and the data line D 1 of the three colors of the pixel region 13 (ie, K 1 , K 2 , K 3 ), each switch tube is disposed between the source of the thin film transistor and the data line D 1 , and the thin film transistors T 1 , T 2 , T 3 are realized by the turn-on and turn-off of the switch tube.
  • the sources s 1 , s 2 , s 3 are selectively connected to the data line D 1 , wherein the other two are turned off when one of the switches K 1 , K 2 , K 3 is turned on.
  • Each of the switch tubes can be a P-type MOS transistor and can be turned on and off under the control of an enable signal.
  • the gate g of the switch K 1 is used to receive an enable signal
  • the drain d of the switch K 1 D 1 is connected to the data line
  • a source switch K s-1 and the thin film transistor T 1 s of the source 1 is connected to the gate of the switch K g 2 for receiving an enable signal
  • the drain of the switch K d 2 of D 1 is connected to the data line
  • the source s of the switch K thin film transistor T and the source s 2 2 2 is connected to the gate of the switch K 3 g for receiving an enable signal
  • the drain of the switch K of d 3 1 is connected to the data line D
  • the source s of the switch K 3 of the thin film transistor T 3 the source electrode s 3 are connected.
  • the circuit shown in FIG. 3 is essentially a Demux circuit, the enable signal is substantially a Demux signal, and the circuit may further include other components such as capacitors, and each switch tube may be of other types instead of the one shown in the figure. P-type MOS tube.
  • FIG. 4 is a timing chart of respective signals of the display panel of the present invention
  • FIG. 5 is a schematic diagram of a driving circuit of an embodiment of the display panel of the present invention.
  • the timing controller 14 and the data driver 12 and the gate driver 11 constitute a driving circuit of the display panel 10, wherein the timing controller 14 is for controlling the output of each signal of the display panel 10, and through the LVDS.
  • the interface Low-Voltage Differential Signaling
  • Mini-LVDS interface is connected to the data driver 12.
  • the timing controller 14 writes in advance the gamma code (program code) of the Gamma voltage to be applied to the pixel electrodes R, G, and B by the data driver 12 to an EEPROM (Electrically Erasable Programmable Read-Only Memory, electrically erasable In the program read only memory, the timing controller 14 reads the gamma code and stores it in the RAM (Random Access Memory) of the timing controller 14 after the driving circuit is powered up. When the screen is displayed, the timing controller 14 transmits the gamma code of the corresponding color to the data driver 12 through an I2C bus (Inter-Integrated Circuit) or an SPI (Serial Peripheral Interface).
  • I2C bus Inter-Integrated Circuit
  • SPI Serial Peripheral Interface
  • Gamma IC programmable gamma voltage generating chip
  • the Gamma IC can be disposed in the data driver 12 and As part of the data driver 12, it can also be provided separately.
  • the gate driver 11 sequentially supplies gate driving signals for the respective gate lines to activate the thin film transistors corresponding to the respective gate lines, and the data driver 12 is directed to the plurality of data lines D 1 , D 2 , ..., D m provides a Gamma voltage to apply a Gamma voltage to the pixel electrodes R, G, B via the activated thin film transistor.
  • a Gamma voltage is applied to the pixel electrodes R of all the pixel regions 13 in the first period t 1
  • a Gamma voltage is applied to the pixel electrodes G of all the pixel regions 13 in the second period t 2 , for all the pixel regions 13 in the third period t 3
  • the pixel electrode B applies a Gamma voltage.
  • the timing controller 14 outputs the low level enable signal En-R and the high level disable signals En-G, En-B to turn on the switch K 1 .
  • the switching transistors K 2 , K 3 are disconnected, the gate driver 11 sequentially turns on the thin film transistors T 1 located in the respective pixel regions 13 and charges the respective pixel electrodes R, and the data driver 12 applies a Gamma voltage to the pixel electrodes R;
  • the timing controller 14 outputs the low level enable signal En-G and the high level disable signals En-R, En-B to turn on the switch K 2 and the switch tubes K 1 , K 3 is disconnected, the gate driver 11 sequentially turns on the thin film transistor T 2 located in each pixel region 13 and charges each pixel electrode G, and the data driver 12 applies a Gamma voltage to the pixel electrode G;
  • the timing controller 14 outputs a low-level enable signal En-B and a high level disable signal En-R
  • the on and off of the above three switches K 1 , K 2 , K 3 depends on the type of each switch tube and the level of the corresponding reception, for example, three switch shown in FIG. 3 K 1, K 2, K 3 is a P-type MOS transistor, each switch is turned off when a high level and the low level is applied is turned on, if the three switch K 1, K 2 and K 3 are N-type MOS transistors, and each of the switching transistors is turned off when a low level is applied and turned on when a high level.
  • each gate line in this embodiment is driven one third at a time, but the number of times of being driven is three in the prior art. Times.
  • this embodiment can treat all pixel electrodes of the same color at the same time. The voltage Gamma voltage is applied, so that the Gamma voltage applied to the pixels of different colors can be independently adjusted, and the display quality of the display panel 10 is improved.
  • the color of the pixel is not limited to three colors of red, green, and blue, for example, a transparent pixel (ie, white) may be added to the display panel 10 to enhance the brightness of the display screen, and the display panel 10 should include four groups of pixels. electrode.
  • the object of the present invention is to divide the pixel electrodes of the display panel into groups according to the color of light that is allowed to pass through, that is, each group of pixel electrodes allows light of the same color to pass through, and the display process of one frame of the screen
  • a separate Gamma voltage is applied to each group of pixel electrodes by the data driver, and the gate lines connected to the group of pixel electrodes are sequentially driven by the gate driver, and then the gate lines connected to the next group of pixel electrodes are sequentially driven, thereby
  • the gamma voltage applied to pixels of different colors can be independently adjusted.

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Abstract

一种显示面板（10）及其驱动方法，根据允许透过的光的颜色将显示面板（10）的像素电极划分为多组，即每组像素电极允许相同颜色的光透过，并在一帧画面的显示过程中，由数据驱动器（12）对每组像素电极施加独立的Gamma电压，由栅极驱动器（11）依次驱动与一组像素电极连接的栅极线之后，再依次驱动与下一组像素电极连接的栅极线，从而能够独立调整施加至不同颜色的像素的Gamma电压。

Description

显示面板及其驱动方法 【技术领域】
本发明涉及显示技术领域，具体涉及显示面板的驱动技术领域，尤其涉及一种显示面板及其驱动方法。
【背景技术】
当前，显示面板进行画面显示的原理为：栅极驱动器依次驱动各条栅极线以依次开启与各条栅极线连接的像素电极的TFT(Thin Film Transistor，薄膜晶体管)，数据驱动器驱动数据线以将灰阶电压施加至与数据线连接的像素电极，显示面板根据接收到的灰阶电压控制液晶分子发生偏转，从而允许不同颜色的光透过以显示画面。由于不同颜色的光的波长不同导致其在显示面板中的穿透率不同，因此需要调整各种颜色的光对应的Gamma曲线(伽马曲线，即灰阶电压-穿透率曲线)，从而确保显示画面的白平衡(White Tracking)。
现有方案普遍利用时序控制器(Timing Control IC，TCON)对不同颜色的光对应的像素电极施加Gamma电压，从而调整不同颜色的光对应的Gamma曲线，例如，对于每一像素区域均包括一个R(Red，红)像素电极、一个G(Green，绿)像素电极以及一个B(Blue，蓝)像素电极的显示面板，结合图1所示的栅极驱动器依次驱动各条栅极线的时序图，可知数据驱动器通过一条数据线将Gamma电压施加至一个像素区域的三个像素电极之后，才能对通过下一条数据线对下一个像素区域的三个像素电极施加Gamma电压。由此可知，现有技术无法对相同颜色的所有像素电极独立施加Gamma电压，无法独立调整施加至不同颜色的像素电极的Gamma电压，当然也就不能很好的调整各种颜色的光对应的Gamma曲线，显示面板的显示品质并不十分理想。
【发明内容】
有鉴于此，本发明实施例提供一种显示面板及其驱动方法，能够独立调整施加至不同颜色的像素的Gamma电压。
本发明一实施例提供一种显示面板，包括时序控制器、分别允许红、绿、蓝三种颜色的光透过的三组像素电极、用于驱动栅极线的栅极驱动器以及用于驱动数据线的数据驱动器，每组像素电极允许相同颜色的光透过，且显示面板的每一像素区域包括一个允许红色光透过的像素电极、一个允许绿色光透过的像素电极和一个允许蓝色光透过的像素电极，每一像素区域对应连接一条栅极线和一条数据线，时序控制器通过I2C总线或串行外设接口SPI控制数据驱动器施加Gamma电压，在一帧画面的显示过程中，数据驱动器在时序控制器的控制下对每组像素电极施加独立的Gamma电压，栅极驱动器在时序控制器的控制下依次驱动与一组像素电极连接的栅极线之后，再依次驱动与下一组像素电极连接的栅极线。
其中，所述显示面板还包括位于每一像素区域的三个TFT，TFT的栅极连接对应的栅极线，TFT的漏极连接对应的像素电极，三个TFT的源极选择性连接数据线，其中三个TFT中一个的源极连接数据线时另外两个的源极断开与数据线的连接。
其中，显示面板进一步包括设置于每一TFT和数据线之间的开关管，开关管在施加于像素区域的使能信号的控制下选择性导通，以此将与TFT的源极连接的像素电极连接至对应的数据线。
本发明另一实施例提供一种显示面板，包括时序控制器、多组像素电极、用于驱动栅极线的栅极驱动器以及用于驱动数据线的数据驱动器，每组像素电极允许相同颜色的光透过，在一帧画面的显示过程中，数据驱动器在时序控制器的控制下对每组像素电极施加独立的Gamma电压，栅极驱动器在时序控制器的控制下依次驱动与一组像素电极连接的栅极线之后，再依次驱动与下一组像素电极连接的栅极线。
其中，显示面板包括分别允许红、绿、蓝三种颜色的光透过的三组像素电极，且显示面板的每一像素区域包括一个允许红色光透过的像素电极、一个允许绿色光透过的像素电极和一个允许蓝色光透过的像素电极，每一像素区域对应连接一条栅极线和一条数据线。
其中，所述显示面板还包括位于每一像素区域的三个TFT，TFT的栅极连接对应的栅极线，TFT的漏极连接对应的像素电极，三个TFT的源极选择性连接数据线，其中三个TFT中一个的源极连接数据线时另外两个的 源极断开与数据线的连接。
其中，显示面板进一步包括设置于每一TFT和数据线之间的开关管，开关管在施加于像素区域的使能信号的控制下选择性导通，以此将与TFT的源极连接的像素电极连接至对应的数据线。
其中，时序控制器通过I2C总线或串行外设接口SPI控制所述数据驱动器施加所述Gamma电压。
本发明又一实施例提供一种显示面板的驱动方法，所述显示面板包括时序控制器、多个像素电极、用于驱动栅极线的栅极驱动器以及用于驱动数据线的数据驱动器，所述驱动方法包括：将多个像素电极划分为多组，每组像素电极允许相同颜色的光透过；在一帧画面的显示过程中，数据驱动器在时序控制器的控制下对每组像素电极施加独立的Gamma电压，栅极驱动器在时序控制器的控制下依次驱动与一组像素电极连接的栅极线之后，再依次驱动与下一组像素电极连接的栅极线。
其中，将多个像素电极划分为允许红、绿、蓝三种颜色的光透过的三组，且显示面板的每一像素区域包括一个允许红色光透过的像素电极、一个允许绿色光透过的像素电极和一个允许蓝色光透过的像素电极，每一像素区域对应连接一条栅极线和一条数据线。
其中，所述显示面板还包括位于每一像素区域的三个TFT，TFT的栅极连接对应的栅极线，TFT的漏极连接对应的像素电极，三个TFT的源极选择性连接数据线，其中三个TFT中一个的源极连接数据线时另外两个的源极断开与数据线的连接。
其中，在每一TFT和数据线之间设置开关管，开关管在施加于像素区域的使能信号的控制下选择性导通，以此将与TFT的源极连接的像素电极连接至对应的数据线。
其中，时序控制器通过I2C总线或串行外设接口SPI控制所述数据驱动器施加所述Gamma电压。
本发明实施例的显示面板及其驱动方法，根据允许透过的光的颜色将显示面板的像素电极划分为多组，即每组像素电极允许相同颜色的光透过，并在一帧画面的显示过程中，由数据驱动器对每组像素电极施加独立的Gamma电压，由栅极驱动器依次驱动与一组像素电极连接的栅极线之后， 再依次驱动与下一组像素电极连接的栅极线，从而能够独立调整施加至不同颜色的像素的Gamma电压。
【附图说明】
图1是现有技术的栅极驱动器驱动栅极线的时序图；
图2是本发明的显示面板一实施例的像素结构示意图；
图3是图2所示一个像素区域的电路结构示意图；
图4是本发明的显示面板的各个信号的时序图；
图5是本发明的显示面板一实施例的驱动电路示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明所提供的示例性的实施例的技术方案进行清楚、完整地描述。
图2是本发明一实施例的显示面板的像素结构示意图。如图2所示，显示面板10包括栅极驱动器11、数据驱动器12、间隔排列的多条栅极线G1，G2，...，Gn以及与栅极线绝缘交叉的数据线D1，D2，...，Dm，其中m和n均为正整数，多条栅极线G1，G2，...，Gn和多条数据线D1，D2，...，Dm定义出显示面板10的多个阵列排布的像素区域13。
每一像素区域13包括分别允许红、绿、蓝三种颜色的光透过的三个像素电极R、G、B，三个像素电极R、G、B共同连接一条栅极线和一条数据线，且每次连接时三个像素电极R、G、B中仅有一个与对应的数据线连接，例如像素电极R与数据线D1连接时像素电极G、B与数据线D1断开，所述“连接”为电连接。
本实施例可以通过如图3所示的电路结构实现上述连接及断开。如图3所示，像素区域13的三个像素电极R、G、B和栅极线G1之间均设置有一个薄膜晶体管(即T1、T2、T3)，其中，薄膜晶体管T1的栅极g1连接栅极线G1，薄膜晶体管T1的漏极d1连接像素电极R，薄膜晶体管T2的栅极g2连接栅极线G1，薄膜晶体管T2的漏极d2连接像素电极G，薄膜晶体管T3的栅极g3连接栅极线G1，薄膜晶体管T3的漏极d3连接像素电极B，薄膜晶体管T1、T2、T3的源极s1、s2、s3选择性连接数据线D1，具体地，像素 区域13的三个颜色的像素电极R、G、B和数据线D1之间还分别设置有一个开关管(即K1、K2、K3)，每一开关管设置于薄膜晶体管的源极与数据线D1之间，通过开关管的导通与断开实现薄膜晶体管T1、T2、T3的源极s1、s2、s3选择性连接数据线D1，其中当开关管K1、K2、K3中的一个导通时另外两个断开。
各个开关管可以为P型MOS管且在使能信号的控制下实现导通与断开，具体地，开关管K1的栅极g用于接收使能信号，开关管K1的漏极d与数据线D1连接，开关管K1的源极s与薄膜晶体管T1的源极s1连接，开关管K2的栅极g用于接收使能信号，开关管K2的漏极d与数据线D1连接，开关管K2的源极s与薄膜晶体管T2的源极s2连接，开关管K3的栅极g用于接收使能信号，开关管K3的漏极d与数据线D1连接，开关管K3的源极s与薄膜晶体管T3的源极s3连接。
图3所示电路实质上是一种Demux电路，所述使能信号实质上为一种Demux信号，该电路还可以包括电容等其他元件，各个开关管也可以为其他类型而非图中所示的P型MOS管。
图4是本发明的显示面板的各个信号的时序图，图5是本发明的显示面板一实施例的驱动电路示意图。结合图4和图5所示，时序控制器14与数据驱动器12、栅极驱动器11构成显示面板10的驱动电路，其中时序控制器14用于控制显示面板10的各个信号的输出，且通过LVDS接口(Low-Voltage Differential Signaling，低电压差分信号接口)或者Mini-LVDS接口与数据驱动器12连接。具体而言，时序控制器14预先将数据驱动器12所要施加于像素电极R、G、B的Gamma电压的Gamma code(程序代码)写入到EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦可编程只读存储器)中，驱动电路上电后时序控制器14读取Gamma code并将其存储于时序控制器14的RAM(Random Access Memory，随机存储器)中。在画面显示时，时序控制器14将对应颜色的Gamma Code通过I2C总线(Inter-Integrated Circuit，两行式串行总线)或者SPI(Serial Peripheral Interface，串行外设接口)传到数据驱动器12的Gamma IC(可编程伽马电压产生芯片)中，从而产生行方向上各像素电极所要施加的Gamma电压，其中Gamma IC可以设置于数据驱动器12中并 作为数据驱动器12的一部分，也可以单独设置。
在时序控制器14的控制下，栅极驱动器11依次为各条栅极线提供栅极驱动信号，以启动每一条栅极线对应的薄膜晶体管，数据驱动器12向多条数据线D1，D2，...，Dm提供Gamma电压，以使Gamma电压经启动的薄膜晶体管施加至像素电极R、G、B。
时序控制器14将每一帧画面的时段划分为三个时段t1、t2、t3，例如一帧画面的时间为1/60秒，则t1＝t2＝t3＝(1/60)/3≈5.5毫秒，即时序控制器14向Gamma IC传输数据的周期为5.5毫秒。在第一时段t1对所有像素区域13的像素电极R施加Gamma电压，在第二时段t2对所有像素区域13的像素电极G施加Gamma电压，在第三时段t3对所有像素区域13的像素电极B施加Gamma电压。具体而言，在第一时段t1，时序控制器14输出低电平的使能信号En-R且高电平的失能信号En-G、En-B，以使开关管K1导通且开关管K2、K3断开，栅极驱动器11依次开启位于各个像素区域13中的薄膜晶体管T1并为各像素电极R充电，数据驱动器12对像素电极R施加Gamma电压；在第二时段t2，时序控制器14输出低电平的使能信号En-G且高电平的失能信号En-R、En-B，以使开关管K2导通且开关管K1、K3断开，栅极驱动器11依次开启位于各个像素区域13中的薄膜晶体管T2并为各像素电极G充电，数据驱动器12对像素电极G施加Gamma电压；在第三时段t3，时序控制器14输出低电平的使能信号En-B且高电平的失能信号En-R、En-G，以使开关管K3导通且开关管K1、K2断开，栅极驱动器11依次开启位于各个像素区域13中的薄膜晶体管T3并为各像素电极B充电，数据驱动器12对像素电极B施加Gamma电压。
上述三个开关管K1、K2、K3的导通与断开(即接收的是使能信号还是失能信号)取决于每一开关管的类型以及对应接收的电平高低，例如，图3所示的三个开关管K1、K2、K3为P型MOS管，则每一开关管在施加高电平时断开且低电平时导通，若三个开关管K1、K2、K3为N型MOS管，则每一开关管在施加低电平时断开且高电平时导通。
相比较于图1所示的现有技术的时序，本实施例中每一条栅极线每次被驱动的时间为现有技术的三分之一，但被驱动的次数为现有技术的三倍。结合前述可知，本实施例由于可以在同一时段对相同颜色的所有像素电极 施加电压Gamma电压，因此能够独立调整施加至不同颜色的像素的Gamma电压，提升显示面板10的显示品质。
应该理解到，由于像素的颜色并不仅限于红、绿、蓝三种颜色，例如显示面板10中可增设透明像素(即白色)以增强显示画面的亮度，此时显示面板10应包括四组像素电极。
综上所述，本发明的目的是根据允许透过的光的颜色将显示面板的像素电极划分为多组，即每组像素电极允许相同颜色的光透过，并在一帧画面的显示过程中，由数据驱动器对每组像素电极施加独立的Gamma电压，由栅极驱动器依次驱动与一组像素电极连接的栅极线之后，再依次驱动与下一组像素电极连接的栅极线，从而能够独立调整施加至不同颜色的像素的Gamma电压。
在此基础上，以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，例如各实施例之间技术特征的相互结合，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种显示面板，其中，所述显示面板包括时序控制器、分别允许红、绿、蓝三种颜色的光透过的三组像素电极、用于驱动栅极线的栅极驱动器以及用于驱动数据线的数据驱动器，其中，每组所述像素电极允许相同颜色的光透过，且所述显示面板的每一像素区域包括一个允许红色光透过的所述像素电极、一个允许绿色光透过的所述像素电极和一个允许蓝色光透过的所述像素电极，每一所述像素区域对应连接一条所述栅极线和一条所述数据线，所述时序控制器通过I2C总线或串行外设接口SPI控制所述数据驱动器施加所述Gamma电压，在一帧画面的显示过程中，所述数据驱动器在所述时序控制器的控制下对每组所述像素电极施加独立的Gamma电压，所述栅极驱动器在所述时序控制器的控制下依次驱动与一组所述像素电极连接的所述栅极线之后，再依次驱动与下一组所述像素电极连接的所述栅极线。
  2. 根据权利要求1所述的显示面板，其中，所述显示面板还包括位于每一所述像素区域的三个TFT，所述TFT的栅极连接对应的所述栅极线，所述TFT的漏极连接对应的所述像素电极，所述三个TFT的源极选择性连接所述数据线，其中所述三个TFT中一个的源极连接所述数据线时另外两个的源极断开与所述数据线的连接。
  3. 根据权利要求2所述的显示面板，其中，所述显示面板进一步包括设置于每一所述TFT和所述数据线之间的开关管，所述开关管在施加于所述像素区域的使能信号的控制下选择性导通，以此将与所述TFT的源极连接的所述像素电极连接至对应的所述数据线。
  4. 一种显示面板，其中，所述显示面板包括时序控制器、多组像素电极、用于驱动栅极线的栅极驱动器以及用于驱动数据线的数据驱动器，其中，每组所述像素电极允许相同颜色的光透过，在一帧画面的显示过程中，所述数据驱动器在所述时序控制器的控制下对每组所述像素电极施加独立的Gamma电压，所述栅极驱动器在所述时序控制器的控制下依次驱动与一组所述像素电极连接的所述栅极线之后，再依次驱动与下一组所述像素电极连接的所述栅极线。
  5. 根据权利要求4所述的显示面板，其中，所述显示面板包括分别允许红、绿、蓝三种颜色的光透过的三组所述像素电极，且所述显示面板的每一像素区域包括一个允许红色光透过的像素电极、一个允许绿色光透过的像素电极和一个允许蓝色光透过的像素电极，每一所述像素区域对应连接一条所述栅极线和一条所述数据线。
  6. 根据权利要求5所述的显示面板，其中，所述显示面板还包括位于每一所述像素区域的三个TFT，所述TFT的栅极连接对应的所述栅极线，所述TFT的漏极连接对应的所述像素电极，所述三个TFT的源极选择性连接所述数据线，其中所述三个TFT中一个的源极连接所述数据线时另外两个的源极断开与所述数据线的连接。
  7. 根据权利要求6所述的显示面板，其中，所述显示面板进一步包括设置于每一所述TFT和所述数据线之间的开关管，所述开关管在施加于所述像素区域的使能信号的控制下选择性导通，以此将与所述TFT的源极连接的所述像素电极连接至对应的所述数据线。
  8. 根据权利要求4所述的显示面板，其中，所述时序控制器通过I2C总线或串行外设接口SPI控制所述数据驱动器施加所述Gamma电压。
  9. 一种显示面板的驱动方法，所述显示面板包括时序控制器、多个像素电极、用于驱动栅极线的栅极驱动器以及用于驱动数据线的数据驱动器，其中，所述驱动方法包括：
    将所述多个像素电极划分为多组，其中每组所述像素电极允许相同颜色的光透过；
    在一帧画面的显示过程中，所述数据驱动器在所述时序控制器的控制下对每组所述像素电极施加独立的Gamma电压，所述栅极驱动器在所述时序控制器的控制下依次驱动与一组所述像素电极连接的所述栅极线之后，再依次驱动与下一组所述像素电极连接的所述栅极线。
  10. 根据权利要求9所述的驱动方法，其中，将所述多个像素电极划分为允许红、绿、蓝三种颜色的光透过的三组，且所述显示面板的每一像素区域包括一个允许红色光透过的像素电极、一个允许绿色光透过的像素电极和一个允许蓝色光透过的像素电极，每一所述像素区域对应连接一条所述栅极线和一条所述数据线。
  11. 根据权利要求10所述的驱动方法，其中，所述显示面板还包括位于每一所述像素区域的三个TFT，所述TFT的栅极连接对应的所述栅极线，所述TFT的漏极连接对应的所述像素电极，所述三个TFT的源极选择性连接所述数据线，其中所述三个TFT中一个的源极连接所述数据线时另外两个的源极断开与所述数据线的连接。
  12. 根据权利要求11所述的驱动方法，其中，在每一所述TFT和所述数据线之间设置开关管，所述开关管在施加于所述像素区域的使能信号的控制下选择性导通，以此将与所述TFT的源极连接的所述像素电极连接至对应的所述数据线。
  13. 根据权利要求9所述的驱动方法，其中，所述时序控制器通过I2C总线或串行外设接口SPI控制所述数据驱动器施加所述Gamma电压。
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