WO2019134407A1 - 像素单元及其驱动方法、显示装置 - Google Patents

像素单元及其驱动方法、显示装置 Download PDF

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Publication number
WO2019134407A1
WO2019134407A1 PCT/CN2018/107973 CN2018107973W WO2019134407A1 WO 2019134407 A1 WO2019134407 A1 WO 2019134407A1 CN 2018107973 W CN2018107973 W CN 2018107973W WO 2019134407 A1 WO2019134407 A1 WO 2019134407A1
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Prior art keywords
sub
pixel
liquid crystal
pixel unit
display
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PCT/CN2018/107973
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English (en)
French (fr)
Inventor
王云奇
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京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to US16/336,085 priority Critical patent/US20210012724A1/en
Publication of WO2019134407A1 publication Critical patent/WO2019134407A1/zh

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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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a pixel unit, a driving method thereof, and a display device.
  • the color image display of a liquid crystal display is usually realized based on the principle of additive color mixing of spatial color mixing, that is, the sub-pixels corresponding to the three primary colors (red R, green G, and blue B) have spatial resolution in the human eye.
  • the indistinguishable high density is arranged in the spatial plane such that the colored lights display a color image by additive color mixing.
  • An object of the present disclosure is to provide a pixel unit, a driving method thereof, and a display device for solving the problem that the display frequency of a single sub-pixel in the field sequential display device is too high.
  • a pixel unit including a plurality of sub-pixels disposed adjacently in sequence, the plurality of sub-pixels being configured to alternately display different colors according to chronological order.
  • the plurality of sub-pixels includes a first sub-pixel and a second sub-pixel, the first sub-pixel and the second sub-pixel being configured to alternately display different colors.
  • the first sub-pixel is configured to display any two colors of red, green, and blue in one frame time
  • the second sub-pixel is configured to display red, a third color other than the two colors displayed by the first sub-pixel in green and blue, and the first sub-pixel is configured to display the third color in the next frame time
  • the second sub-pixel is configured to display any two of the colors.
  • the pixel unit further includes a liquid crystal layer and a backlight module
  • the backlight module is configured to sequentially emit different colors of light in a frame period according to chronological order.
  • the backlight module includes a light source and a driving circuit
  • the light source includes a red light source, a green light source, and a blue light source;
  • the driving circuit is configured to acquire a control signal and drive the red light source, the green light source, and the blue light source to sequentially emit light in a frame period according to the control signal.
  • a driving time of each sub-pixel includes a liquid crystal response time and a backlight display time, and the liquid crystal layer switches between a closed state and an open state in the liquid crystal response time, and the The liquid crystal layer remains open during the backlight display time.
  • a response curve of opening and closing of the liquid crystal layer is symmetrical.
  • the pixel unit further includes:
  • the driving circuit is configured to drive the backlight module such that the backlight module emits light corresponding to the color of another sub-pixel at a liquid crystal response off time of one sub-pixel to compensate for brightness of the other sub-pixel.
  • the response curves of the opening and closing of the liquid crystal layer are asymmetrical.
  • the pixel unit further includes:
  • the brightness compensation module is configured to dynamically adjust the brightness of the backlight module according to the transmittance of the pixel unit detected during the liquid crystal response time to reduce brightness fluctuation when different sub-pixels are switched.
  • a display device including the above-described pixel unit is provided.
  • a driving method of a pixel unit for driving the above display device includes:
  • a plurality of sub-pixels adjacent to each other in the control pixel unit are rotated to display different colors in time series.
  • the plurality of sub-pixels adjacent to each other in the control pixel unit are rotated according to a chronological order to display different colors, including:
  • Each sub-pixel in the driving pixel unit rotates light of each color emitted by the backlight module.
  • the controlling the backlight module sequentially emitting different colors of light in a frame period according to chronological order includes:
  • the backlight module is controlled to sequentially emit red light, green light, and blue light in a frame period according to chronological order.
  • each sub-pixel in the driving pixel unit rotates through each color emitted by the backlight module.
  • the light includes:
  • the first sub-pixel and the second sub-pixel are driven to alternately transmit light of respective colors emitted by the backlight module.
  • a driving time of each sub-pixel includes a liquid crystal response time and a backlight display time in the same sub-frame, and the liquid crystal layer is in a closed state and an on-state state in the liquid crystal response time. Switching, and the liquid crystal layer remains on during the backlight display time,
  • the method also includes controlling the backlight to emit light of the same color at a liquid crystal response time and a backlight display time.
  • the response curves of the opening and closing of the liquid crystal layer are symmetrical.
  • the driving method further includes: the backlight module emitting light corresponding to a color of another sub-pixel at a liquid crystal response off time of one sub-pixel to compensate another sub-pixel Brightness.
  • the response curves of the opening and closing of the liquid crystal layer are asymmetrical.
  • the driving method further includes:
  • FIG. 1 is a schematic view showing a pixel structure in the prior art
  • FIG. 2 is a schematic view showing another pixel structure in the prior art
  • FIG. 3 schematically illustrates a sub-pixel distribution map of a pixel unit in an exemplary embodiment of the present disclosure
  • FIG. 4 is a schematic structural view showing a pixel unit in an exemplary embodiment of the present disclosure.
  • FIG. 5 schematically shows an operation timing chart of a pixel unit in an exemplary embodiment of the present disclosure
  • FIG. 6 is a flow chart schematically showing a driving method of a display device in an exemplary embodiment of the present disclosure.
  • Fig. 1 shows a color image display device realized based on the principle of additive color mixing of spatial color mixing.
  • this display mode generally needs to filter the white light 100 by using a color filter (CF) 10 to obtain sub-pixels 20 corresponding to three colors of R, G, and B.
  • CF color filter
  • field sequential liquid crystal displays based on the principle of additive color mixing of time color mixing have been widely studied and applied.
  • the specific implementation manner of the field sequential liquid crystal display is to use the R, G, and B color backlights to perform color mixing on the time axis, that is, R, G, and the undetectable speed of the human eye time resolution.
  • the B tri-color image is quickly switched on the time axis to display a color image by temporal color mixing.
  • the frame rates of the three sub-frames of R, G, and B need to be increased by three times, wherein each sub-frame contains the liquid crystal response time and The light source illuminates time, and such a high frequency is a very serious challenge for the liquid crystal response and the design of the driving circuit.
  • the present exemplary embodiment provides a pixel unit applied to a field sequential liquid crystal display device.
  • the pixel unit 30 may include a plurality of sub-pixels 300 disposed adjacent to each other in sequence, and the plurality of sub-pixels 300 are used to alternately display different colors according to chronological order, for example, may be rotated to transmit through the backlight module.
  • the light thus achieves the display of the pixel image.
  • the backlight module is configured to sequentially emit different colors of light in a frame period according to chronological order, for example, red light, green light, and blue light may be sequentially emitted according to a time sequence. It can be seen that any sub-pixel 300 transmits only light of a single color in one sub-frame time, and all sub-pixels 300 can alternately transmit light of different colors within one frame time.
  • the light emitted by the backlight module should include at least red light R, green light G, and blue light B, and may further include other colors of light such as yellow light Y or white light W as needed.
  • the pixel unit 30 provided by the exemplary embodiment of the present disclosure includes a plurality of sub-pixels 300.
  • the plurality of sub-pixels 300 can be rotated through the backlight module.
  • the emitted light can effectively reduce the display frequency of the individual sub-pixels 300 on the basis of ensuring the color display of the field sequence.
  • the pixel unit 30 since the pixel unit 30 has a simple structure and has good matching with the existing pixel structure and the manufacturing process thereof, the implementation is less difficult.
  • a plurality of sub-pixels 300 may be included in each pixel unit 30.
  • two to three sub-pixels 300 may be disposed in one pixel unit 30.
  • the effect of reducing the display frequency of the single sub-pixel 300 can be achieved.
  • the embodiment preferably provides two sub-pixels 300, that is, a first sub-pixel and a second sub-pixel, in each pixel unit 30, so that the two sub-pixels 300 can alternately transmit light emitted by the backlight module, thereby realizing display of the pixel image. .
  • the first sub-pixel may be configured to display any two colors of red, green, and blue
  • the second sub-pixel may be configured to display red, green, and blue in addition to the first a third color other than the two colors displayed by one sub-pixel
  • the first sub-pixel may be configured to display the third color
  • the second sub-pixel may be configured to display the Any two colors. Therefore, display of the pixel image is achieved by alternately displaying the different colors using the first sub-pixel and the second sub-pixel.
  • the pixel unit 30 may include a first substrate 301 and a second substrate 302 disposed opposite to each other, and a liquid crystal layer 303 between the first substrate 301 and the second substrate 302 .
  • the first substrate 301 may include, for example, a thin film transistor 304, a pixel electrode electrically connected to the thin film transistor 304, and a first alignment layer disposed adjacent to the liquid crystal layer 303; and the second substrate 302 may include, for example, and the thin film transistor 304.
  • the black matrix 305 and the thin film transistor 304 are arranged to mean that the orthographic projection of the black matrix 305 on the first substrate 301 can completely cover the orthographic projection of the thin film transistor 304 on the first substrate 301.
  • the backlight module sequentially emits different colors of light, for example, sequentially emitting red, green, and blue light according to chronological order. That is to say, the light emitted by the backlight module itself is colored light, so that color display can be realized without additionally setting a color filter. Thereby, the loss of the light source due to the absorption of light by the color filter is avoided, thereby improving the utilization of the backlight.
  • a conventional LCD generally uses three sub-pixels of R, G, and B for color mixing, and each pixel unit, that is, a pixel point, is represented by three sub-pixels, and one pixel unit in this embodiment, that is, a pixel point, can pass only two sub-pixels.
  • the representation is performed, so that in the case of the same size and pixel resolution, the area of a single sub-pixel can be increased by 1.5 times, so that the transmittance of light and the aperture ratio of the pixel can be significantly increased to improve the efficiency of use of light energy.
  • the working principle of the pixel unit 30 is exemplified below by taking the 60 Hz frame rate commonly used by the LCD as an example, and the structure of the dual sub-pixel 300 shown in FIG.
  • the backlight adopts RGB three-color light source, and the arrows in the figure respectively represent red light R, green light G and blue light B emitted by the backlight module, then the three subframes (red subframe, green subframe and blue subframe)
  • the display frequency of each is 180 Hz, that is, each sub-frame occupies about 5.56 ms.
  • the display frequency of each sub-pixel 300 is 90 Hz, respectively.
  • FIG. 5 shows an operation timing chart of the pixel unit 30. Since the current field sequence display method is to turn on the backlight source of the corresponding sub-frame after the data writing of the sub-frame and the response of the liquid crystal molecules are completed, the display operation of each sub-pixel 300 can be divided into a liquid crystal response stage and a backlight display stage. Parts.
  • the working process of the pixel unit 30 includes a liquid crystal response time and a backlight display time, and the liquid crystal layer switches between a closed state and an open state during the liquid crystal response time, and the liquid crystal layer The backlight display time remains on during the display. More specifically, the working process of the pixel unit 30 is as follows:
  • the first sub-pixel for example, the sub-pixel 300 on the left side of FIG. 4 is turned on after a liquid crystal response time, and the backlight module outputs red light R, and the second sub-pixel is, for example, the right side of FIG.
  • the sub-pixel 300 remains off, and at this stage, the pixel unit 30 is displayed as a red sub-frame;
  • the backlight module outputs green light G in the liquid crystal response stage, the first sub-pixel is turned off after a liquid crystal response time, and the second sub-pixel is turned on after the liquid crystal response time.
  • the one-stage pixel unit 30 is displayed as a green sub-frame;
  • the backlight module outputs blue light B during the liquid crystal response stage, and the second sub-pixel is turned off after a liquid crystal response time, and the first sub-pixel is turned on after the liquid crystal response time.
  • the one-stage pixel unit 30 is displayed as a blue sub-frame;
  • Subsequent sub-frame timings are the same as above, and are not described here.
  • the liquid crystal response generally needs to include two processes of turning on and off.
  • the dual sub-pixel structure is adopted, and the second sub-pixel is controlled to be turned on at the same time during the closing of the first sub-pixel, if the response curve of the liquid crystal is turned on and off is symmetric.
  • the actual transmittance of the pixel unit ie, the sum of the transmittances of the sub-pixels
  • the liquid crystal response time and the backlight display time of the backlight in one sub-frame time are controlled to emit light of the same color. Therefore, since the backlight module can output light in the liquid crystal response stage, the waiting time of the liquid crystal on and off can be eliminated, and the display time can be reduced under the premise of ensuring the brightness, so as to realize the requirement of high display frequency of the field sequence.
  • the other two subframes are not turned on, so the response process of the liquid crystal cannot be compensated, and the backlight needs to be lit after the liquid crystal response is completed; For each subsequent subframe, the two subframes can be mutually compensated, so the backlight can be turned on during the liquid crystal response phase.
  • the backlight is lit in the response phase of the liquid crystal to cause the backlight to emit green light.
  • the liquid crystal response process of the second sub-pixel is an on-phase, and at the same time, the first sub-pixel is undergoing a process of closing the liquid crystal response, and therefore, a part of the green light is emitted through the first sub-pixel, thereby compensating for the liquid crystal response of the second sub-pixel.
  • the luminance of the first sub-pixel gradually decreases, and the luminance of the second sub-pixel gradually rises, and at this time, the total amount of the pixel unit is maintained at a desired luminance.
  • the transmittance of the pixel unit will fluctuate upward during the liquid crystal response process.
  • the brightness fluctuation can be compensated by appropriately reducing the brightness of the green backlight or increasing the rise time of the green backlight during the liquid crystal response. Therefore, in the case where the liquid crystal response time is asymmetrical, the luminance fluctuation of the pixel unit can be compensated by adjusting the backlight.
  • the color image can be displayed by rapidly mixing the red light R, the green light G, and the blue light B in an indistinguishable time. Since the dual sub-pixel 300 structure alternately displays the color sub-frames in this embodiment, the display frequency of each sub-pixel 300 can be significantly reduced, thereby reducing the implementation difficulty of the field sequential liquid crystal display.
  • each of the pixel units 30 may include a plurality of sub-pixels 300, such as the dual sub-pixels 300, which may be used for rotation to transmit light emitted by the backlight module, thereby ensuring the basis of field sequential color display.
  • the display frequency of the single sub-pixel 300 can be effectively reduced.
  • the present embodiment further provides a display device, including the above display panel and a backlight module, wherein the backlight module is configured to sequentially emit different colors of light in a frame period according to chronological order.
  • the light emitted by the backlight module should include at least red light R, green light G, and blue light B, and may further include other colors of light such as yellow light Y or white light W as needed.
  • the display device provided by the exemplary embodiment of the present disclosure can effectively reduce the display frequency of a single sub-pixel on the basis of ensuring the color display of the field sequence, and may include, for example, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, and navigation. Any product or part that has a display function.
  • the backlight module may include a light source such as an LED (Light Emitting Diode) strip and a driving circuit.
  • the LED strip is used as a backlight to save energy.
  • the light source such as an LED light strip
  • the LED light bar can be driven, for example, in three ways, that is, the red LED light bar is driven by the first driving circuit, the green LED light bar is driven by the second driving circuit, and the blue LED is driven.
  • the light bar is driven by a third drive circuit.
  • the first driving circuit drives the red LED strip to emit light, all the red LED strips of the entire backlight module are illuminated.
  • the LED light bar can be driven not only in a split circuit but also in a block drive, that is, a group of LED light bars (including a red LED light bar, a green LED light bar, and a blue LED light bar).
  • One or more pixel units 30 may be corresponding.
  • each of the LED strips of the area may be sequentially driven to emit light according to the area corresponding to the one or more pixel units 30 when the backlight is turned on.
  • each sub-pixel 300 may include the liquid crystal response time and the backlight display time, and the rise time in the liquid crystal response time is generally less than the fall time, which causes another sub-frame to be completely closed.
  • a sub-frame has been fully turned on, causing fluctuations in luminance when switching between different sub-pixels 300.
  • the display device may further include a brightness compensation module, and the brightness compensation module may dynamically adjust the brightness of the backlight module according to the transmittance of the pixel unit 30 detected during the liquid crystal response time.
  • the liquid crystal transmittance curve is actually tested, and the brightness of the backlight is dynamically compensated according to the transmittance curve, so that the difference can be reduced.
  • the brightness of the pixel 300 is switched when switching, thereby ensuring the stability of the pixel brightness.
  • the example embodiment further provides a driving method of a pixel unit for driving the pixel unit described above.
  • the driving method may include: controlling a plurality of sub-pixels sequentially adjacent in the pixel unit to alternately display different colors according to chronological order.
  • the driving method may include:
  • the control backlight module sequentially emits different colors of light in a frame period according to chronological order;
  • Each sub-pixel 300 in the driving pixel unit 30 rotates light of each color emitted by the backlight module.
  • the driving method provided by the exemplary embodiment of the present disclosure can control the plurality of sub-pixels 300 to be sequentially illuminated with the backlight, so that the plurality of sub-pixels 300 can be rotated through the light emitted by the backlight module, thereby ensuring the field sequence.
  • the display frequency of the individual sub-pixels 300 can be effectively reduced based on the color display.
  • the pixel unit 30 since the pixel unit 30 has a simple structure and has good matching with the existing pixel structure and the manufacturing process thereof, the implementation is less difficult.
  • the light emitted by the backlight module should include at least red light R, green light G, and blue light B.
  • the controlling the backlight module to sequentially emit different colors of light in a frame period according to the chronological sequence may include: controlling the backlight module to sequentially emit red light R and green light in a frame period according to chronological order. G and Blu-ray B.
  • the pixel unit 30 may be a dual sub-pixel structure, for example, including only the first sub-pixel and the second sub-pixel.
  • each of the sub-pixels 300 in the driving pixel unit 30 rotating the light of each color emitted by the backlight module may include: driving the first sub-pixel and the second sub-pixel to alternately transmit through the backlight module. The light of each color.
  • each sub-pixel 300 may include a liquid crystal response time and a backlight display time, and the rise time of the liquid crystal response time is generally less than the fall time. Therefore, the driving method provided by the example embodiment may further include:
  • the backlight module can emit light, for example, in the liquid crystal response time of the second sub-pixel to compensate the brightness of the first sub-pixel.
  • the pixel unit and the driving method thereof and the display device provided by the exemplary embodiment of the present disclosure can rotate the plurality of sub-pixels in the pixel unit in sequence with the backlight, so that the plurality of sub-pixels can be rotated through the backlight module.
  • the emitted light can effectively reduce the display frequency of a single sub-pixel on the basis of ensuring the color display of the field sequence.
  • the structure of the pixel unit is simple and has good matching with the existing pixel structure and the preparation process thereof, the implementation difficulty is low.

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Abstract

一种像素单元（30）及其驱动方法、显示装置，涉及显示技术领域。所述像素单元（30）包括依次相邻设置的多个子像素（300），该多个子像素（300）用于根据时间顺序轮换显示不同的颜色，其中，所述多个子像素（300）包括第一子像素和第二子像素，所述第一子像素和所述第二子像素配置为交替显示不同的颜色。

Description

像素单元及其驱动方法、显示装置
相关申请的交叉引用
本申请要求于2018年01月02日递交的中国专利申请第201810002924.3号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开涉及显示技术领域，尤其涉及一种像素单元及其驱动方法、显示装置。
背景技术
液晶显示器(Liquid Crystal Display，LCD)的彩色图像显示通常是基于空间混色的加色混合原理而实现的，即将三原色(红色R、绿色G、蓝色B)对应的子像素以人眼空间分辨率不可区分的高密度排列在空间平面中，从而使得这些彩色光通过加色混合而显示出彩色图像。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本公开的目的在于提供一种像素单元及其驱动方法、显示装置，以用于解决场序列显示装置中单个子像素的显示频率过高的问题。
本公开的其他特性和优点将通过下面的详细描述变得显然，或部分地通过本公开的实践而习得。
根据本公开的一个方面，提供一种像素单元，括依次相邻设置的多个子像素，该多个子像素配置为根据时间顺序轮换显示不同的颜色。
本公开的一种示例性实施例中，所述多个子像素包括第一子像 素和第二子像素，所述第一子像素和所述第二子像素配置为交替显示不同的颜色。
本公开的一种示例性实施例中，在一帧时间内，所述第一子像素配置为显示红色、绿色和蓝色中的任意两种颜色，所述第二子像素配置为显示红色、绿色和蓝色中除所述第一子像素显示的两种颜色之外的第三种颜色，并且在下一帧时间内，所述第一子像素配置为显示所述第三种颜色，所述第二子像素配置为显示所述任意两种颜色。
本公开的一种示例性实施例中，所述像素单元还包括液晶层和背光模组；
其中，所述背光模组配置为根据时间顺序在一帧周期内按序发出不同颜色的光。
本公开的一种示例性实施例中，所述背光模组包括光源以及驱动电路；
所述光源包括红光光源、绿光光源和蓝光光源；
所述驱动电路配置为获取控制信号并根据所述控制信号驱动所述红光光源、所述绿光光源和所述蓝光光源在一帧周期内依次发光。
本公开的一种示例性实施例中，每个子像素的驱动时间均包括液晶响应时间和背光显示时间，所述液晶层在所述液晶响应时间内在关闭状态和开启状态之间切换，并且所述液晶层在所述背光显示时间保持开启状态。
本公开的一种示例性实施例中，所述液晶层的开启和关闭的响应曲线是对称的。
本公开的一种示例性实施例中，所述像素单元还包括：
驱动电路配置为驱动所述背光模组，使得所述背光模组在一子像素的液晶响应关闭时间发出对应于另一子像素的颜色的光，以补偿另一子像素的亮度。
本公开的一种示例性实施例中，所述液晶层的开启和关闭的响应曲线是不对称的。
本公开的一种示例性实施例中，所述像素单元还包括：
亮度补偿模块，配置为根据在所述液晶响应时间内检测到的所 述像素单元的透过率动态调节所述背光模组的发光亮度，以降低不同子像素切换时的亮度波动。
根据本公开的一个方面，提供一种显示装置，包括上述的像素单元。
根据本公开的一个方面，提供一种像素单元的驱动方法，用于驱动上述的显示装置；其特征在于，所述驱动方法包括：
控制像素单元中依次相邻的多个子像素根据时间顺序轮换显示不同的颜色。
本公开的一种示例性实施例中，所述控制像素单元中依次相邻的多个子像素根据时间顺序轮换显示不同的颜色包括：
控制背光模组根据时间顺序在一帧周期内按序发出不同颜色的光；
驱动像素单元中的各个子像素轮换透过所述背光模组发出的各个颜色的光。
本公开的一种示例性实施例中，所述控制背光模组根据时间顺序在一帧周期内按序发出不同颜色的光包括：
控制所述背光模组根据时间顺序在一帧周期内依次发出红光、绿光和蓝光。
本公开的一种示例性实施例中，在所述像素单元包括第一子像素和第二子像素时，所述驱动像素单元中的各个子像素轮换透过所述背光模组发出的各个颜色的光包括：
驱动所述第一子像素和所述第二子像素交替透过所述背光模组发出的各个颜色的光。
本公开的一种示例性实施例中，每个子像素的驱动时间在同一子帧内均包括液晶响应时间和背光显示时间，所述液晶层在所述液晶响应时间内在关闭状态和开启状态之间切换，并且所述液晶层在所述背光显示时间保持开启状态，
所述方法还包括控制所述背光在液晶响应时间和背光显示时间发射相同颜色的光。
本公开的一种示例性实施例中，所述液晶层的开启和关闭的响 应曲线是对称的。
本公开的一种示例性实施例中，所述驱动方法还包括：所述背光模组在一子像素的液晶响应关闭时间发出对应于另一子像素的颜色的光，以补偿另一子像素的亮度。
本公开的一种示例性实施例中，所述液晶层的开启和关闭的响应曲线是不对称的。
本公开的一种示例性实施例中，所述驱动方法还包括：
根据在所述液晶响应时间内检测到的所述像素单元的透过率动态调节所述背光模组的光源亮度，以降低不同子像素切换时的亮度波动。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，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示意性示出现有技术中一像素结构的示意图；
图2示意性示出现有技术中另一像素结构的示意图；
图3示意性示出本公开示例性实施例中像素单元的子像素分布图；
图4示意性示出本公开示例性实施例中像素单元的结构示意图；
图5示意性示出本公开示例性实施例中像素单元的工作时序图；
图6示意性示出本公开示例性实施例中显示装置的驱动方法流程图。
具体实施方式
现在将参考附图更全面地描述示例实施例。然而，示例实施例 能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施例使得本公开将更加全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的实施例的充分理解。然而，本领域技术人员将意识到，可以实践本公开的技术方案而省略所述特定细节中的一个或更多，或者可以采用其它的方法、组元、装置、步骤等。在其它情况下，不详细示出或描述公知技术方案以避免使本公开的各方面变得模糊。
此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。附图中各层的厚度和形状不反映真实比例，仅是为了便于说明本公开的内容。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
图1示出了一种基于空间混色的加色混合原理而实现的彩色图像显示装置。如图1所示，这种显示方式通常需要利用彩色滤光片(Colour Filter，CF)10对白光100进行过滤以得到对应R、G、B三色光的子像素20。为了能够提高光能的使用效率，基于时间混色的加色混合原理的场序列液晶显示器受到了广泛的研究与应用。如图2所示，所述场序列液晶显示器的具体实现方式是采用R、G、B三色背光源在时间轴上进行混色，即以人眼时间分辨率不可察觉的速度将R、G、B三色影像在时间轴上快速切换，从而通过时间混色来显示出彩色图像。但是，相比于传统的空间混色技术，时间混色技术若要达到同样的帧频则需将R、G、B三个子帧的帧频均提高3倍，其中每个子帧都包含液晶响应时间和光源点亮时间，而如此高的频率对于液晶响应以及驱动电路的设计都是十分严峻的挑战。
基于此，本示例实施方式提供了一种像素单元，应用于场序列液晶显示装置。如图3所示，所述像素单元30可以包括依次相邻设置的多个子像素300，该多个子像素300用于根据时间顺序轮换显示不同的颜色，例如可轮换工作以透过背光模组发出的光，从而实现像素图像的显示。其中，所述背光模组用于根据时间顺序在一帧周期内 按序发出不同颜色的光，例如可以根据时间顺序依次发出红光、绿光和蓝光。由此可知，任一子像素300在一子帧时间内仅透过单一颜色的光，所有子像素300在一帧时间内可轮换透过不同颜色的光。
需要说明的是：所述背光模组发出的光应当至少包括红光R、绿光G和蓝光B，且根据需要还可以进一步包括其它颜色的光例如黄光Y或者白光W。
本公开示例性实施方式所提供的像素单元30中包括多个子像素300结构，通过控制该多个子像素300配合背光源依次按序点亮，即可使该多个子像素300轮换透过背光模组发出的光，从而在保证场序列彩色显示的基础上能够有效的降低单个子像素300的显示频率。此外，由于该像素单元30的结构简单，且与现有的像素结构及其制备工艺具有良好的匹配性，因此实施难度较低。
基于上述的像素单元30可知，每个像素单元30中可以包括多个子像素300，例如一像素单元30中可以设置两到三个子像素300。但考虑到较多的子像素300数量会对像素密度(Pixels Per Inch，PPI)产生一定的影响，而两个子像素300交替工作已经能够达到降低单个子像素300的显示频率的效果，因此本示例实施方式优选在每个像素单元30中设置两个子像素300即第一子像素和第二子像素，以使该两个子像素300能够交替透过背光模组发出的光，从而实现像素图像的显示。
例如，在一帧时间内，第一子像素可以被配置为显示红色、绿色和蓝色中的任意两种颜色，第二子像素可以被配置为显示红色、绿色和蓝色中除所述第一子像素显示的两种颜色之外的第三种颜色，并且在下一帧时间内，第一子像素可以被配置为显示所述第三种颜色，第二子像素可以被配置为显示所述任意两种颜色。因此，通过交替地利用第一子像素和第二子像素显示不同的颜色，从而实现像素图像的显示。
本示例实施方式中，如图4所示，所述像素单元30可以包括相对设置的第一基板301和第二基板302，以及位于第一基板301和第二基板302之间的液晶层303。其中，所述第一基板301例如可以包 括薄膜晶体管304，与薄膜晶体管304电连接的像素电极，以及靠近液晶层303设置的第一取向层；所述第二基板302例如可以包括与薄膜晶体管304对应设置的黑矩阵305，以及靠近液晶层303设置的第二取向层。
需要说明的是：这里所述的黑矩阵305与薄膜晶体管304对应设置是指，黑矩阵305在第一基板301上的正投影可以完全覆盖薄膜晶体管304在第一基板301上的正投影。
应当注意的是，本示例实施方式中的第二基板302上无需设置彩色滤光片。由于本实施例所提供的像素单元30是基于场序列显示原理进行工作的，那么背光模组便会根据时间顺序依次发出不同颜色的光例如按序发出红光、绿光和蓝光。也就是说，背光模组所发的光本身就是彩色光，因此无需额外设置彩色滤光片也能实现彩色显示。从而避免了由于彩色滤光片吸收光而造成的光源损失，从而提高了背光的利用率。此外，传统LCD通常使用R、G、B三个子像素进行混色，每个像素单元即像素点需由三个子像素进行表示，而本实施例中的一个像素单元即像素点可以仅通过两个子像素进行表示，因此在同等尺寸和像素分辨率的情况下，单个子像素的面积可增大1.5倍，从而能够显著的增加光线的透过率以及像素的开口率，以提高光能的使用效率。
下面以LCD常用的60Hz帧频为例，结合图4所示的双子像素300结构对所述像素单元30的工作原理进行示例性的说明。其中，背光源采用RGB三色光源，图中的箭头分别代表背光模组发出的红光R、绿光G和蓝光B，则这三个子帧(红色子帧、绿色子帧和蓝色子帧)的显示频率分别为180Hz，即每个子帧约占5.56ms。当采用图4所示的双子像素300结构交替显示各子帧时，每个子像素300的显示频率分别为90Hz。
图5示出了像素单元30的工作时序图。由于目前的场序列显示方法是在子帧的数据写入以及液晶分子响应完成后才会打开对应子帧的背光光源，因此每个子像素300的显示操作可以分为液晶响应阶段和背光显示阶段两个部分。而在本示例实施方式中，所述像素单元 30的工作过程包括液晶响应时间和背光显示时间，所述液晶层在所述液晶响应时间内在关闭状态和开启状态之间切换，并且所述液晶层在所述背光显示时间保持开启状态。更具体地，所述像素单元30的工作过程如下：
在第一个红色子帧的显示过程中，第一子像素例如图4左边的子像素300经过一液晶响应时间后打开，此时背光模组输出红光R，第二子像素例如图4右边的子像素300保持关闭，这一阶段该像素单元30显示为红色子帧；
在第二个绿色子帧的显示过程中，背光模组在液晶响应阶段便输出绿光G，第一子像素经过一液晶响应时间后关闭，第二子像素经过该液晶响应时间后打开，这一阶段像素单元30显示为绿色子帧；
在第三个蓝色子帧的显示过程中，背光模组在液晶响应阶段便输出蓝光B，第二子像素经过一液晶响应时间后关闭，第一子像素经过该液晶响应时间后打开，这一阶段像素单元30显示为蓝色子帧；
随后的各色子帧时序同上，这里不再赘述。
液晶响应通常需要包括开启和关闭两个过程，本实施例采用双子像素结构，在第一子像素关闭的过程中控制第二子像素同时响应开启，假如液晶的开启和关闭的响应曲线是对称的，则像素单元的实际透过率(即各子像素的透过率之和)不会发生改变。基于此，在本实施例中，控制所述背光在一个子帧时间内的液晶响应时间和背光显示时间均发射相同颜色的光。因此，由于背光模组能够在液晶响应阶段便进行光的输出，因此能够消除液晶开启和关闭的等待时间，在保证亮度的前提下减小显示时间，以实现场序列高显示频率的需求。
需要说明的是：本实施例中，由于第一个红色子帧是显示开始阶段，其它两个子帧均未开启，因此无法对液晶的响应过程进行补偿，需要待液晶响应完成后点亮背光；而对于后续的各个子帧，前后两个子帧是可以相互补偿的，因此可以在液晶响应阶段便打开背光。
更具体地说，如图5所示，在第一个绿色子帧中，在液晶的响应阶段即点亮背光使背光发出绿色光。此时，第二子像素的液晶响应过程为开启阶段，同时，第一子像素正在经历液晶响应关闭的过程， 因此，一部分绿光通过第一子像素出射，从而补偿第二子像素在液晶响应开启阶段的亮度。即，如图5所示，第一子像素的亮度逐渐下降，第二子像素的亮度逐渐上升，此时像素单元的总量度保持为期望的亮度。
在此基础上，若显示内容要求红色子帧与绿色子帧的亮度相同，而液晶的实际开启时间少于实际关闭时间，则在液晶响应过程中像素单元的透过率便会向上波动，此时可以在液晶响应过程中适当减小绿色背光的亮度或者增大绿色背光的上升时间来实现对亮度波动的补偿。因此，在液晶响应时间不对称的情况下，能够通过调节背光来补偿像素单元的亮度波动。
这样一来，通过在一人眼不可分辨的时间内将红光R、绿光G和蓝光B进行快速混色，便可以实现彩色图像的显示。由于本实施例采用双子像素300结构交替显示各色子帧，因此能够明显的降低每个子像素300的显示频率，从而减小了场序列液晶显示器的实现难度。
本示例实施方式还提供了一种显示面板，包括上述的像素单元30。该显示面板中，每个像素单元30均可以包括多个子像素300例如双子像素300，该多个子像素300可用于轮换作用以透过背光模组发出的光，从而在保证场序列彩色显示的基础上能够有效的降低单个子像素300的显示频率。
本示例实施方式还提供了一种显示装置，包括上述的显示面板以及背光模组；其中，所述背光模组用于根据时间顺序在一帧周期内按序发出不同颜色的光。
需要说明的是：所述背光模组发出的光应当至少包括红光R、绿光G和蓝光B，且根据需要还可以进一步包括其它颜色的光例如黄光Y或者白光W。
本公开示例性实施方式所提供的显示装置可在保证场序列彩色显示的基础上有效的降低单个子像素的显示频率，其例如可以包括手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本示例实施方式中，所述背光模组可以包括光源例如LED(Light Emitting Diode，发光二极管)灯条以及驱动电路，这里采用LED灯条作为背光源具有节约能耗的优点。
具体而言，所述光源例如LED灯条应当至少包括红光光源例如红光LED灯条、绿光光源例如绿光LED灯条、以及蓝光光源例如蓝光LED灯条；所述驱动电路可用于获取控制信号并根据控制信号驱动红光光源、绿光光源和蓝光光源在一帧周期内依次进行发光。
在一实施例中，所述LED灯条例如可以分三路进行驱动，即红光LED灯条由第一路驱动电路进行驱动、绿光LED灯条由第二路驱动电路进行驱动、蓝光LED灯条由第三路驱动电路进行驱动。在此情况下，当任一路驱动电路驱动对应的LED灯条进行发光例如第一路驱动电路驱动红光LED灯条进行发光时，整个背光模组的所有红光LED灯条均会点亮。
在另一实施例中，所述LED灯条不仅可以分路驱动，还可以进一步分块驱动，即一组LED灯条(包括红光LED灯条、绿光LED灯条和蓝光LED灯条)可以对应一个或多个像素单元30。在此情况下，在进行背光点亮时可以根据该一个或多个像素单元30对应的区域驱动该区域的各个LED灯条依次进行发光。
进一步的，考虑到每个子像素300的驱动时间均会包括液晶响应时间和背光显示时间，而液晶响应时间中的上升时间一般会少于下降时间，这就导致在一子帧尚未完全关闭时另一子帧已经完全开启，从而造成在不同子像素300进行切换时会产生亮度的波动。
基于此，所述显示装置还可以进一步包括一亮度补偿模块，该亮度补偿模块可根据在液晶响应时间内检测到的像素单元30的透过率动态调节背光模组的发光亮度。
具体而言，在液晶的响应过程中，像素单元30的显示亮度可以表示为：L＝(T 1+T 2)×BL；其中，BL为背光源的发光亮度，T 1和T 2分别为第一子像素和第二子像素的透过率。在本实施例中，由于液晶响应时间中的上升时间一般少于下降时间，因此通过实际测试液晶透过率曲线，并根据该透过率曲线对背光亮度进行动态补偿，这样便可 以降低不同子像素300切换时的亮度波动，从而保证像素亮度的稳定性。
本示例实施方式还提供了一种像素单元的驱动方法，用于驱动上述的像素单元。该驱动方法可以包括：控制像素单元中依次相邻的多个子像素根据时间顺序轮换显示不同的颜色。
具体而言，如图6所示，所述驱动方法可以包括：
S1、控制背光模组根据时间顺序在一帧周期内按序发出不同颜色的光；
S2、驱动像素单元30中的各个子像素300轮换透过背光模组发出的各个颜色的光。
本公开示例性实施方式所提供的驱动方法，通过控制多个子像素300配合背光源依次按序点亮，即可使该多个子像素300轮换透过背光模组发出的光，从而在保证场序列彩色显示的基础上能够有效的降低单个子像素300的显示频率。此外，由于该像素单元30的结构简单，且与现有的像素结构及其制备工艺具有良好的匹配性，因此实施难度较低。
本示例实施方式中，所述背光模组发出的光应当至少包括红光R、绿光G和蓝光B。在此情况下，所述控制背光模组根据时间顺序在一帧周期内按序发出不同颜色的光具体可以包括：控制背光模组根据时间顺序在一帧周期内依次发出红光R、绿光G和蓝光B。
本示例实施方式中，所述像素单元30可以为双子像素结构例如仅包括第一子像素和第二子像素。在此情况下，所述驱动像素单元30中的各个子像素300轮换透过背光模组发出的各个颜色的光具体可以包括：驱动第一子像素和第二子像素交替透过背光模组发出的各个颜色的光。
考虑到每个子像素300的驱动时间均会包括液晶响应时间和背光显示时间，而液晶响应时间中的上升时间一般会少于下降时间，因此本示例实施方式所提供的驱动方法还可以进一步包括：
S3、根据在液晶响应时间内检测到的像素单元30的透过率动态调节背光模组的光源亮度，以降低不同子像素300切换时的亮度波 动。
其中，所述背光模组例如可以在第二子像素的液晶响应时间发光，以补偿第一子像素的亮度。
需要说明的是：所述驱动方法的具体细节已经在对应的像素单元30中进行了详细的描述，这里不再赘述。
本公开示例性实施方式所提供的像素单元及其驱动方法、显示装置，通过控制像素单元中的多个子像素配合背光源依次按序点亮，即可使该多个子像素轮换透过背光模组发出的光，从而在保证场序列彩色显示的基础上能够有效的降低单个子像素的显示频率。此外，由于该像素单元的结构简单，且与现有的像素结构及其制备工艺具有良好的匹配性，因此实施难度较低。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (16)

  1. 一种像素单元，包括依次相邻设置的多个子像素，该多个子像素配置为根据时间顺序轮换显示不同的颜色，
    其中，所述多个子像素包括第一子像素和第二子像素，所述第一子像素和所述第二子像素配置为交替显示不同的颜色。
  2. 根据权利要求1所述的像素单元，其中，在一帧时间内，所述第一子像素配置为显示红色、绿色和蓝色中的任意两种颜色，所述第二子像素配置为显示红色、绿色和蓝色中除所述第一子像素显示的两种颜色之外的第三种颜色，并且在下一帧时间内，所述第一子像素配置为显示所述第三种颜色，所述第二子像素配置为显示所述任意两种颜色。
  3. 根据权利要求1所述的像素单元，其中，还包括液晶层和背光模组；
    其中，所述背光模组配置为根据时间顺序在一帧周期内按序发出不同颜色的光。
  4. 根据权利要求3所述的像素单元，其中，所述背光模组包括光源以及驱动电路；
    所述光源包括红光光源、绿光光源和蓝光光源；
    所述驱动电路配置为获取控制信号并根据所述控制信号驱动所述红光光源、所述绿光光源和所述蓝光光源在一帧周期内依次发光。
  5. 根据权利要求3所述的像素单元，其中，每个子像素的驱动时间均包括液晶响应时间和背光显示时间，所述液晶层在所述液晶响应时间内在关闭状态和开启状态之间切换，并且所述液晶层在所述背光显示时间保持开启状态。
  6. 根据权利要求5所述的像素单元，其中，所述液晶层的开启和关闭的响应曲线是对称的。
  7. 根据权利要求6所述的像素单元，所述像素单元还包括：
    驱动电路配置为驱动所述背光模组，使得所述背光模组在一子像素的液晶响应关闭时间发出对应于另一子像素的颜色的光，以补偿另一子像素的亮度。
  8. 根据权利要求5所述的像素单元，所述像素单元还包括：
    亮度补偿模块，配置为根据在所述液晶响应时间内检测到的所述像素单元的透过率动态调节所述背光模组的发光亮度，以降低不同子像素切换时的亮度波动。
  9. 一种显示装置，包括权利要求1-8任一项所述的像素单元。
  10. 一种像素单元的驱动方法，用于驱动权利要求1-8任一项所述的像素单元，所述驱动方法包括：
    控制像素单元中依次相邻的多个子像素根据时间顺序轮换显示不同的颜色，
    其中，所述控制像素单元中依次相邻的多个子像素根据时间顺序轮换显示不同的颜色包括：
    控制背光模组根据时间顺序在一帧周期内按序发出不同颜色的光；
    驱动像素单元中的各个子像素轮换透过所述背光模组发出的各个颜色的光。
  11. 根据权利要求10所述的驱动方法，其中，所述控制背光模组根据时间顺序在一帧周期内按序发出不同颜色的光包括：
    控制所述背光模组根据时间顺序在一帧周期内依次发出红光、绿光和蓝光。
  12. 根据权利要求10所述的驱动方法，其中，在所述像素单元包括第一子像素和第二子像素时，所述驱动像素单元中的各个子像素轮换透过所述背光模组发出的各个颜色的光包括：
    驱动所述第一子像素和所述第二子像素交替透过所述背光模组发出的各个颜色的光。
  13. 根据权利要求10所述的驱动方法，其中，每个子像素的驱动时间在同一子帧内均包括液晶响应时间和背光显示时间，所述液晶层在所述液晶响应时间内在关闭状态和开启状态之间切换，并且所述液晶层在所述背光显示时间保持开启状态，
    所述方法还包括控制所述背光在液晶响应时间和背光显示时间发射相同颜色的光。
  14. 根据权利要求13所述的驱动方法，其中，所述液晶层的开启和关闭的响应曲线是对称的。
  15. 根据权利要求14所述的驱动方法，所述驱动方法还包括：
    所述背光模组在一子像素的液晶响应关闭时间发出对应于另一子像素的颜色的光，以补偿另一子像素的亮度。
  16. 根据权利要求13所述的驱动方法，所述驱动方法还包括：
    根据在所述液晶响应时间内检测到的所述像素单元的透过率动态调节所述背光模组的光源亮度，以降低不同子像素切换时的亮度波动。
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