WO2015196500A1 - 色序型液晶显示器及其驱动方法 - Google Patents

色序型液晶显示器及其驱动方法 Download PDF

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Publication number
WO2015196500A1
WO2015196500A1 PCT/CN2014/081402 CN2014081402W WO2015196500A1 WO 2015196500 A1 WO2015196500 A1 WO 2015196500A1 CN 2014081402 W CN2014081402 W CN 2014081402W WO 2015196500 A1 WO2015196500 A1 WO 2015196500A1
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WIPO (PCT)
Prior art keywords
color
pixel
picture
liquid crystal
grayscale value
Prior art date
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Ceased
Application number
PCT/CN2014/081402
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English (en)
French (fr)
Inventor
樊勇
康志聪
张简圣哲
谭小平
谢剑军
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.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/374,543 priority Critical patent/US9483985B2/en
Publication of WO2015196500A1 publication Critical patent/WO2015196500A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3607Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2003Display of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2007Display of intermediate tones
    • G09G3/2074Display of intermediate tones using sub-pixels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • G09G3/3413Details of control of colour illumination sources
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0439Pixel structures
    • G09G2300/0452Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235Field-sequential colour display
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0242Compensation of deficiencies in the appearance of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0252Improving the response speed
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a color sequential liquid crystal display.
  • 3 ⁇ 4 Scene LCD or LCD (Liquid Crystal Display) is a flat, ultra-thin display device consisting of a certain number of color or black and white pixels placed in front of the light source or reflector.
  • Liquid crystal displays have been widely used in various electronic products, for example, computer devices with display screens, mobile phones, or digital photo frames.
  • the traditional thin film transistor liquid crystal display (TFT-LCD) is a color filter with a white backlight and three filters of red (R), blue (G), and green (G).
  • the substrate is matched with each other to achieve the effect of color display. In this display mode, the color filter portion has a large loss of light, and about 2/3 of the light is lost.
  • a color-sequential liquid crystal display with a colorless filter
  • the color-sequence liquid crystal display does not need to use the red, blue and green filters, but uses the color fields of red, blue and green to sequentially illuminate in a picture time, using the visual persistence phenomenon of the human eye.
  • Three colors of backlight add color to achieve color image display.
  • a conventional color sequential liquid crystal display often has a color breakup phenomenon when displaying an image. Specifically, when a moving picture of a moving object is displayed, the viewer's eyes reflexively track the movement of the object.
  • the color-sequential liquid crystal display of the achromatic filter requires a screen refresh rate of at least 180 Hz to ensure the quality of the displayed picture.
  • high transmittance and low power consumption of FSC-LCD and improve the color cracking of FSC-LCD and reduce the refresh rate of the picture, in recent years, one has two color resists and transparent color resists.
  • the 120HZ FSC color sequential liquid crystal display has been developed.
  • the color filter of the liquid crystal display In the substrate, a transparent photoresist, a green photoresist and a blue photoresist are disposed corresponding to each pixel unit; the backlight module of the liquid crystal display can provide a white backlight and a red backlight; each screen of the liquid crystal display is displayed by Two color fields are mixed to form.
  • the specific driving process includes: (1) In the first color field of each picture, the backlight module provides a white light backlight, and the transparent sub-pixel, the green sub-pixel, and the blue sub-pixel in the pixel unit are in Open state, so that the first color field has WGB three-color image information; as shown in Figure 1-(b), in the second color field of each picture, the white backlight is turned off, and the backlight module provides a red backlight, while The green sub-pixel and the blue sub-pixel are in a closed state, and the transparent sub-pixel is in an on state, so that the backlight displays the R-color image information after passing through the color filter. After the two color fields are combined, a complete color picture information is obtained.
  • the green sub-pixel and the blue sub-pixel are both turned off in the second color field of each picture, the first color field, the green sub-pixel and the blue sub-picture in the next picture
  • the pixel is on, and the transparent subpixel is always on.
  • W1 is the reaction rate of the transparent sub-pixel white opening 128 gray level when the first picture is in the first color field
  • R1 is the first picture in the second color field
  • the transparent sub-pixel is red on 128 gray.
  • G1/B1 is the reaction rate of the green/blue sub-pixel white opening 128 gray level in the first picture in the first color field (W2, W3, R2, R3, G2/B2, G3/B3 This type of push).
  • the gray scale of the green sub-pixel and the blue sub-pixel is slower from 0 to 128 in the same time, and the gray scale of the red sub-pixel is faster from 0 to 128, so one There will be less green and blue and more red in the picture, and the problem of color shift will occur.
  • the present invention provides a driving method of a color sequential liquid crystal display for driving the liquid crystal display to display a plurality of consecutive pictures, and the liquid crystal display adopting the driving method retains FSC-LCD has the advantages of high color gamut, high transmittance and low power consumption, and improves the color cracking of FSC-LCD and reduces the refresh rate of the picture, while also solving the problem of color shift.
  • a driving method of a color sequential liquid crystal display for driving the liquid crystal display to display a plurality of consecutive pictures, each pixel unit in the liquid crystal display includes a transparent sub-pixel, a first color sub-pixel and a second color sub-pixel, each picture comprising a first color field and a second color field
  • the driving method comprises the steps of: calculating a four-pixel gray of each picture a step value, the four-pixel gray scale includes a white pixel grayscale value, a first color pixel grayscale value, a second color pixel grayscale value, and a third color pixel grayscale value; providing a white backlight to the pixel unit when the first color field of the nth frame is a sub-pixel inputs a white pixel grayscale value of the nth picture, a first color pixel grayscale value of the nth picture is input to the first color subpixel, and an nth picture is input to the second color subpixel a second color
  • the 0th frame refers to the The liquid crystal display screen when the machine is turned on.
  • the white pixel grayscale value of the n+1th picture is input to the first color subpixel, and the n+1th picture is input to the second color subpixel a white pixel grayscale value of the picture; wherein the first color is green, the second color is blue, and the third color is red.
  • the first color is green, the second color is red, and the third color is blue.
  • the first color is blue, the second color is red, and the third color is green.
  • the meter calculates the four-pixel grayscale value of each picture by converting RGB three pixels into RGBW four pixels.
  • a color sequential liquid crystal display including a liquid crystal panel and a backlight module disposed opposite to each other, wherein the backlight module provides a display light source to the liquid crystal panel to display the liquid crystal panel
  • the liquid crystal panel includes a thin film transistor substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer between the thin film transistor substrate and the color filter substrate, wherein each of the color filter substrates corresponds to each pixel
  • the unit is provided with a transparent photoresist, a first color photoresist, and a second color photoresist.
  • the backlight module includes a first backlight and a second backlight, and the first backlight is a white backlight.
  • the second light source is a third color backlight, wherein the liquid crystal display is driven by the driving method as described above.
  • the first color photoresist is a green photoresist
  • the second color photoresist is a blue photoresist
  • the third color backlight is a red backlight.
  • the first color photoresist is a green photoresist
  • the second color photoresist is a red photoresist
  • the third color backlight is a blue backlight.
  • the first color photoresist is a blue photoresist
  • the second color photoresist is a red photoresist
  • the third color backlight is a green backlight.
  • the present invention provides a driving method of a color sequential liquid crystal display for driving a liquid crystal display having two color resists and a transparent color resist, and driving a first color field and a second color field of each picture
  • a driving method of a color sequential liquid crystal display for driving a liquid crystal display having two color resists and a transparent color resist, and driving a first color field and a second color field of each picture
  • the liquid crystal cells corresponding to each sub-pixel have a small difference in reaction rate, which solves the color shift problem caused by a large difference in liquid crystal reaction rate.
  • FIG. 3 is a schematic structural diagram of a color sequential liquid crystal display according to an embodiment of the present invention.
  • 4 is a schematic view showing the process of displaying a picture on the liquid crystal display shown in FIG. 3.
  • FIG. 5 is a schematic diagram of screen information obtained in the display process of FIG. 4.
  • FIG. 6 is an exemplary diagram of a driving method of a color sequential liquid crystal display according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION As described above, an object of the present invention is to provide a driving method of a color sequential liquid crystal display and a corresponding liquid crystal display to solve a color caused by a large difference in liquid crystal reaction rate corresponding to each sub-pixel in a pixel unit. Partial problem.
  • the color sequential liquid crystal display includes a liquid crystal panel and a backlight module disposed opposite to each other, and the backlight module provides a display light source to the liquid crystal panel, so that the liquid crystal panel displays a screen, and each screen It is formed by mixing a first color field and a second color field.
  • the liquid crystal panel includes a thin film transistor substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer between the thin film transistor substrate and the color filter substrate.
  • a transparent layer is disposed in each of the pixel units in the color filter substrate
  • the photoresist, a first color photoresist, and a second color photoresist correspond to the transparent sub-pixel, the first color sub-pixel, and the second color sub-pixel in each pixel unit.
  • the first color and the second color may be any two of red, green, and blue, and the remaining other color is used as the third color.
  • the backlight module includes a first backlight and a second backlight, the first backlight is a white backlight, and the second light source is a third color backlight.
  • the liquid crystal display driving method as described above mainly includes the steps of:
  • FIG. 3 is a schematic structural diagram of a color sequential liquid crystal display provided by the embodiment.
  • the liquid crystal display is a color sequential liquid crystal display having two color resistors (in the embodiment, a green color resist and a blue color resist are exemplified in detail) and a transparent color resist.
  • the liquid crystal display includes a liquid crystal panel 100 and a backlight module 200 disposed oppositely, and the backlight module 200 provides a display light source to the
  • the liquid crystal panel 100 is configured to cause the liquid crystal panel 100 to display a screen.
  • the liquid crystal panel 100 includes a thin film transistor substrate 1 and a color filter substrate 2 disposed opposite to each other, and a liquid crystal layer 3 between the thin film transistor substrate 1 and the color filter substrate 2 .
  • the color filter 4 in the color filter substrate 2 is provided with a transparent photoresist 41, a green photoresist 42 and a blue photoresist 43 corresponding to each pixel unit, corresponding to transparent sub-pixels and green sub-pixels in each pixel unit. Pixels and blue subpixels.
  • the backlight module 200 includes a first backlight and a second backlight, wherein the first backlight is a white backlight and the second light source is a red backlight. Referring to FIG. 4-6, the liquid crystal display driving process as described above mainly includes:
  • the four-pixel grayscale value includes a white pixel grayscale value W, a red pixel grayscale value of 1 ⁇ , and a green pixel grayscale Value 0, blue pixel grayscale value 8.
  • the four-pixel grayscale values of the first picture are represented as Wl, Rl, Gl, and Bl, respectively
  • the four-pixel grayscale values of the second picture are represented as W2, R2, G2, and B2, respectively.
  • the pixel grayscale values are represented as W3, R3, G3, and B3, respectively
  • the four-pixel grayscale values of the fourth frame are represented as W4, R4, G4, and B4, and so on.
  • the four-pixel grayscale value of each picture can be calculated by any method of converting RGB three pixels into RGBW four pixels in the prior art.
  • the white pixel gray level value W1 of the first picture is input to the transparent sub-pixel
  • the green sub-pixel inputs the green pixel grayscale value G1 of the first frame
  • the blue pixel grayscale value B1 of the first frame is input to the blue sub-pixel.
  • the first color field has WGB three-color image information, see Figure 5-(a).
  • a red backlight is provided to the pixel unit (represented by R in FIG. 6), and the red pixel grayscale value of the first picture is input to the transparent sub-pixel, and the green sub-pixel is turned to the green sub-pixel. And the blue sub-pixel inputs the white pixel grayscale value of the second picture.
  • the backlight module 200 provides a red backlight.
  • the green sub-pixel and the blue sub-pixel remain open at this time, due to the presence of the green photoresist 42 and the blue photoresist 43, the red light cannot pass through the green photoresist 42 and the blue light.
  • the color sequential liquid crystal display and the driving method thereof provided by the above embodiments, when driving the first color field and the second color field of each picture, all the sub-pixels in each pixel unit are in an on state, so that each The liquid crystal cell corresponding to the sub-pixel has a small difference in reaction rate, and solves the color shift problem caused by a large difference in liquid crystal reaction rate.
  • the color sequential liquid crystal display retains the advantages of high color gamut, high transmittance and low power consumption of the FSC-LCD and improves the color cracking of the FSC-LCD and reduces the refresh rate of the picture.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

一种色序型液晶显示器的驱动方法,包括步骤:计算出每一画面的四像素灰阶值,包括白色像素灰阶值(W)、第一颜色像素灰阶值(G)、第二颜色像素灰阶值(B)、第三颜色像素灰阶值(R);在第n幅画面的第一色场时,向像素单元提供白色背光源,向透明子像素输入第n幅画面的白色像素灰阶值(W),向第一颜色子像素输入第n幅画面的第一颜色像素灰阶值(G),向第二颜色子像素输入第n幅画面的第二颜色像素灰阶值(B);在第n幅画面的第二色场时,向像素单元提供第三颜色背光源,向透明子像素输入第n幅画面的第三颜色像素灰阶值(R),向第一颜色子像素和第二颜色子像素输入一灰阶值保持开启状态。还公开了一种采用如上所述驱动方法进行驱动的色序型液晶显示器。

Description

色序型液晶显示器及其驱动方法 技术领域 本发明涉及液晶显示器技术领域, 尤其涉及一种色序型液晶显示器
( Field-Sequential-Color Liquid Crystal Display, FSC-LCD ) 以及该液晶 显示器驱动方法。
¾景 术 液晶显示器, 或称 LCD (Liquid Crystal Display), 为平面超薄的显示设 备, 它由一定数量的彩色或黑白像素组成, 放置于光源或者反射板前方。 液晶 显示器已广泛使用于各种电子产品中, 例如, 具显示屏幕的计算机设备、 行动 电话、 或数字相框等。 传统的薄膜晶体管液晶显示器 (Thin-Film transistor Liquid Crystal Displays, TFT-LCD) 是采用白色背光源与配置有红 (R) 、 蓝 (G) 、 绿 (G) 三种滤光片的彩色滤光片基板相互搭配, 来达到彩色显示的效果, 这种显示方 式中, 彩色滤光片部分对光的损耗较大, 大约 2/3左右的光被损耗掉。 为了更好 的利用背光的光源, 减少光损失, 一种无彩色滤光片的色序型液晶显示器 (FSC-LCD) 应运而生。 色序型液晶显示器不需要使用红蓝绿滤光片, 而是使用 红、 蓝、 绿三种颜色的色场, 在一幅画面的时间内依序照光, 利用人眼的视觉 暂留现象使三种颜色的背光加成混色以达成彩色影像的显示效果。 传统的色序 型液晶显示器在显示影像时常常会发生色裂 (Color Breakup ) 的现象, 具体来 说, 在显示有移动物体的动态画面时, 观赏者的眼睛反射性地会追踪物体的移 动, 当人眼与显示影像有相对速度时, 三个色场会成像在视网膜的不同位置而 造成色彩的分离, 以致于观赏者会感觉到这个移动物体的边缘出现不同程度的 彩暈。 并未, 无彩色滤光片的色序型液晶显示器需要至少 180HZ的画面刷新频率 才能够 保证显示画面的质量。 为了保留 FSC-LCD高色域、高穿透率和低功耗的优点并改善 FSC-LCD的色裂 现象和降低画面的刷新频率, 近年来, 一种具有两种彩色色阻和透明色阻的 120HZ FSC色序型液晶显示器得到发展。 如图 1所示, 该液晶显示器的彩色滤光 基板中, 对应每一像素单元设置有一透明光阻、 一绿色光阻以及一蓝色光阻; 该液晶显示器的背光模组可以提供白色背光源和红色背光源; 该液晶显示器显 示的每一画面由两个色场混合形成。 具体的驱动过程包括: 如图 1- ( a)、 在每 一画面的第一色场时, 背光模组提供白光背光源, 像素单元中的透明子像素、 绿色子像素、 蓝色子像素处于开启状态, 这样第一色场就具有 WGB三色图像信 息; 如图 1- ( b)、 在每一画面的第二色场时, 白色背光源关闭, 背光模组提供 红光背光源, 同时绿色子像素和蓝色子像素处于关闭状态, 且透明子像素处于 开启状态, 这样背光透过彩色滤光片后显示 R色图像信息。 两色场合成后便得 到一幅完整的彩色画面信息。
采用如上所述的驱动方式, 由于在每一幅画面的第二色场, 绿色子像素和 蓝色子像素都处于关闭状态, 在下一幅画面的第一色场, 绿色子像素和蓝色子 像素处于打开状态, 而透明子像素则一直处于打开的状态。 如图 2所示, 其中 W1 为第一幅画面在第一色场时透明子像素白色开启 128灰阶的反应速率, R1为第一 幅画面在第二色场时透明子像素红色开启 128灰阶的反应速率, G1/B1为第一幅 画面在第一色场时绿色 /蓝色子像素白色开启 128灰阶的反应速率 (W2、 W3, R2、 R3, G2/B2、 G3/B3以此类推)。 由于液晶反应速率不够快, 在同样的时间内绿色 子像素和蓝色子像素的灰阶从 0~128的速度比较慢, 红色子像素的灰阶从 0~128 的速度比较快, 因此一幅画面中会呈现绿色和蓝色少而红色多的现象, 就会出 现色偏的问题。 发明内容 为了解决上述现有技术所存在的问题, 本发明提供了色序型液晶显示器的 驱动方法, 用于驱动所述液晶显示器显示多个连续的画面, 采用该驱动方法的 液晶显示器既保留了 FSC-LCD高色域、高穿透率和低功耗的优点并改善 FSC-LCD 的色裂现象和降低画面的刷新频率, 同时还达到解决色偏的问题。 为了实现上述目的, 本发明采用了如下的技术方案: 一种色序型液晶显示器的驱动方法, 用于驱动所述液晶显示器显示多个连 续的画面, 所述液晶显示器中的每一像素单元包括一透明子像素、 一第一颜色 子像素以及一第二颜色子像素, 每一画面包括第一色场和第二色场, 其中, 该 驱动方法包括步骤: 计算出每一画面的四像素灰阶值, 所述四像素灰阶包括白色像素灰阶值、 第一颜色像素灰阶值、 第二颜色像素灰阶值、 第三颜色像素灰阶值; 在第 n幅画面的第一色场时, 向所述像素单元提供白色背光源, 向所述透 明子像素输入第 n幅画面的白色像素灰阶值, 向所述第一颜色子像素输入第 n 幅画面的第一颜色像素灰阶值, 向所述第二颜色子像素输入第 n幅画面的第二 颜色像素灰阶值; 在第 n幅画面的第二色场时, 向所述像素单元提供第三颜色背光源, 向所 述透明子像素输入第 n幅画面的第三颜色像素灰阶值, 向所述第一颜色子像素 和第二颜色子像素输入一灰阶值使所述第一颜色子像素和第二颜色子像素保持 开启状态; 其中, n=l、 2、 3、 4……; 其中, 在第 0幅画面的第二色场时, 向所述第一颜色子像素输入第 1幅画 面的白色像素灰阶值, 向所述第二颜色子像素输入第 1幅画面的白色像素灰阶 值; 所述第 0幅画面是指所述液晶显示器在开启机器时的画面。 其中, 在第 n幅画面的第二色场时, 向所述第一颜色子像素输入第 n+1幅 画面的白色像素灰阶值, 向所述第二颜色子像素输入第 n+1幅画面的白色像素 灰阶值; 其中, 所述第一颜色为绿色, 所述第二颜色为蓝色, 所述第三颜色为红色。 其中, 所述第一颜色为绿色, 所述第二颜色为红色, 所述第三颜色为蓝色。 其中, 所述第一颜色为蓝色, 所述第二颜色为红色, 所述第三颜色为绿色。 其中, 米用 RGB三像素转换为 RGBW四像素的方法计算每一画面的四像 素灰阶值。 本发明的另一方面是提供一种色序型液晶显示器, 包括相对设置的液晶面 板以及背光模组, 由所述背光模组提供显示光源给所述液晶面板, 以使所述液 晶面板显示画面; 其中, 所述液晶面板包括相对设置的薄膜晶体管基板和彩色 滤光基板以及位于所述薄膜晶体管基板和彩色滤光基板之间的液晶层, 其中, 所述彩色滤光基板中对应每一像素单元设置有一透明光阻、 一第一颜色光阻以 及一第二颜色光阻, 所述背光模组包含第一背光源和第二背光源, 所述第一背 光源为白色背光源, 所述第二光源为第三颜色背光源, 其中, 该液晶显示器采 用如上所述的驱动方法进行驱动。 其中, 所述第一颜色光阻为绿色光阻, 所述第二颜色光阻为蓝色光阻, 所 述第三颜色背光源为红色背光源。 其中, 所述第一颜色光阻为绿色光阻, 所述第二颜色光阻为红色光阻, 所 述第三颜色背光源为蓝色背光源。 其中, 所述第一颜色光阻为蓝色光阻, 所述第二颜色光阻为红色光阻, 所 述第三颜色背光源为绿色背光源。 有益效果: 本发明提供的色序型液晶显示器的驱动方法, 用于驱动一种具有两种彩色 色阻和透明色阻的液晶显示器, 在驱动每一画面的第一色场和第二色场时, 每 一像素单元中所有子像素都处于开启的状态, 使得每一子像素对应的液晶单元 具有很小的反应速率差异, 解决了由于液晶反应速率差异大而引起的色偏问题。 附图说明 图 1现有的一种色序型液晶显示器及其驱动过程的示例性图示。 图 2为如图 1所示的液晶显示器在驱动过程中液晶反应速率的图示。 图 3为本发明实施例提供的色序型液晶显示器的结构示意图。 图 4为如图 3所示的液晶显示器显示一幅画面的过程示意图。 图 5为对应图 4的显示过程中得到的画面信息的示意图。 图 6为本发明实施例提供的色序型液晶显示器的驱动方法的示例性图示。 具体实施方式 如前所述, 本发明的目的是提供一种色序型液晶显示器的驱动方法以及相 应的液晶显示器, 以解决由于像素单元中各子像素对应的液晶反应速率差异大 而引起的色偏问题。 为此, 本发明提供的色序型液晶显示器包括相对设置的液晶面板以及背光 模组, 由所述背光模组提供显示光源给所述液晶面板, 以使所述液晶面板显示 画面, 每一画面由第一色场和第二色场混合形成。 其中, 所述液晶面板包括相 对设置的薄膜晶体管基板和彩色滤光基板以及位于所述薄膜晶体管基板和彩色 滤光基板之间的液晶层。 所述彩色滤光基板中对应每一像素单元设置有一透明 光阻、 一第一颜色光阻以及一第二颜色光阻, 对应于每一像素单元中的透明子 像素、 第一颜色子像素以及第二颜色子像素。 第一颜色和第二颜色可以是红色、 绿色和蓝色中的任意两种, 余下的另一颜色作为第三颜色。 所述背光模组包含 第一背光源和第二背光源, 所述第一背光源为白色背光源, 所述第二光源为第 三颜色背光源。 如上所述的液晶显示器驱动方法主要包括步骤:
( a ) 计算出每一画面的四像素灰阶值, 所述四像素灰阶包括白色像素灰阶 值、 第一颜色像素灰阶值、 第二颜色像素灰阶值、 第三颜色像素灰阶值。
(b) 在第 n幅画面的第一色场时, 向所述像素单元提供白色背光源, 向所 述透明子像素输入第 n幅画面的白色像素灰阶值, 向所述第一颜色子像素输入 第 n幅画面的第一颜色像素灰阶值, 向所述第二颜色子像素输入第 n幅画面的 第二颜色像素灰阶值。
(c) 在第 n幅画面的第二色场时, 向所述像素单元提供第三颜色背光源, 向所述透明子像素输入第 n幅画面的第三颜色像素灰阶值, 向所述第一颜色子 像素和第二颜色子像素输入一灰阶值使所述第一颜色子像素和第二颜色子像素 保持开启状态。 其中, n=l、 2、 3、 4……; 其中, 在第 0幅画面的第二色场时, 向所述第一颜色子像素输入第 1幅画 面的白色像素灰阶值, 向所述第二颜色子像素输入第 1幅画面的白色像素灰阶 值; 所述第 0幅画面是指所述液晶显示器在开启机器时的画面。 通过在驱动每一画面的第一色场和第二色场时, 每一像素单元中所有子像 素都处于开启的状态, 使得每一子像素对应的液晶单元具有很小的反应速率差 异, 解决了由于液晶反应速率差异大而引起的色偏问题。 为了更好地阐述本发明的技术特点和结构, 以下结合实施例及其附图进行 详细描述。 图 3为本实施例提供的色序型液晶显示器的结构示意图。 如图 3所示, 该 液晶显示器是一种具有两种彩色色阻 (本实施例中是以绿色色阻和蓝色色阻为 例进行详细说明) 和透明色阻的色序型液晶显示器。 该液晶显示器包括相对设 置的液晶面板 100以及背光模组 200,由所述背光模组 200提供显示光源给所述 液晶面板 100, 以使所述液晶面板 100显示画面。 其中, 液晶面板 100包括相对 设置的薄膜晶体管基板 1和彩色滤光基板 2以及位于所述薄膜晶体管基板 1和 彩色滤光基板 2之间的液晶层 3。所述彩色滤光基板 2中的彩色滤光片 4对应每 一像素单元设置有一透明光阻 41、 绿色光阻 42以及蓝色光阻 43, 对应于每一 像素单元中的透明子像素、 绿色子像素以及蓝色子像素。 所述背光模组 200包 含第一背光源和第二背光源, 其中第一背光源为白色背光源, 第二光源为红色 背光源。 参阅图 4-6, 如上所述的液晶显示器驱动过程主要包括:
1、 对于多幅连续的画面, 首先计算出每一幅画面的四像素灰阶值, 所述四 像素灰阶值包括白色像素灰阶值 W、 红色像素灰阶值1^、 绿色像素灰阶值0、 蓝色像素灰阶值8。 例如, 第 1幅画面的四像素灰阶值分别表示为 Wl、 Rl、 Gl、 Bl, 第 2幅画面的四像素灰阶值分别表示为 W2、 R2、 G2、 B2, 第 3幅画 面的四像素灰阶值分别表示为 W3、 R3、 G3、 B3, 第 4幅画面的四像素灰阶值 分别表示为 W4、 R4、 G4、 B4, 以此类推。 可以采用已有技术中任意一种 RGB 三像素转换为 RGBW四像素的方法来计算出每一画面的四像素灰阶值。
2、 参阅图 6, 对于液晶显示器在开启机器时的画面 (在此, 可以用在第 0 幅画面来表示), 在第 0幅画面的第一色场时, 背光源关闭, 透明子像素、 绿色 子像素以及蓝色子像素都不需要输入信号; 在第 0幅画面的第二色场时, 透明 子像素不需要输入信号, 向绿色子像素和蓝色子像素输入第 1幅画面的白色像 素灰阶值 Wl。
3、 参阅图 4- ( a) , 在第 n幅画面的第一色场时, 向像素单元提供白色背光 源, 向透明子像素输入第 n幅画面的白色像素灰阶值, 向绿色子像素输入第 n 幅画面的绿色像素灰阶值, 向蓝色子像素输入第 n幅画面的蓝色像素灰阶值。 例如, 参阅图 6, 对于 1幅画面的第一色场, 向像素单元提供白色背光源 (图 6 中用 W表示), 向透明子像素输入第 1幅画面的白色像素灰阶值 Wl, 向绿色子 像素输入第 1幅画面的绿色像素灰阶值 Gl, 向蓝色子像素输入第 1幅画面的蓝 色像素灰阶值 B l。 这样第一色场就具有 WGB三色图像信息, 参阅图 5- ( a)。
4、 参阅图 4- (b), 在第 n幅画面的第二色场时, 向像素单元提供红色背光 源, 向透明子像素输入第 n幅画面的红色像素灰阶值, 向绿色子像素和蓝色子 像素输入第 n+1幅画面的白色像素灰阶值, 使绿色子像素和蓝色子像素保持开 启状态 (在另外的一些实施例中, 在第 n幅画面的第二色场时, 可以向向绿色 子像素和蓝色子像素输入其他的灰度值, 只要可以使绿色子像素和蓝色子像素 保持开启状态即可; 本实施例中, 输入第 n+1幅画面的白色像素灰阶值可以使 画面得到更好的显示亮度)。 例如, 在第 1幅画面的第二色场时, 向像素单元提 供红色背光源(图 6中用 R表示), 向透明子像素输入第 1幅画面的红色像素灰 阶值, 向绿色子像素和蓝色子像素输入第 2幅画面的白色像素灰阶值。 此时背 光模组 200提供的是红色背光, 尽管此时绿色子像素和蓝色子像素保持开启, 由于绿色光阻 42以及蓝色光阻 43的存在, 红色光不能通过绿色光阻 42以及蓝 色光阻 43, 这样红色背光透过彩色滤光片后显示 R色图像信息, 参阅图 5- (b)。 第一色场和第二色场合成后便得到一幅完整的 RGB彩色画面信息, 参阅图 5。 以上实施例提供的色序型液晶显示器及其驱动方法, 通过在驱动每一画面 的第一色场和第二色场时, 每一像素单元中所有子像素都处于开启的状态, 使 得每一子像素对应的液晶单元具有很小的反应速率差异, 解决了由于液晶反应 速率差异大而引起的色偏问题。 另外, 该色序型液晶显示器还保留了 FSC-LCD 高色域、 高穿透率和低功耗的优点并改善 FSC-LCD的色裂现象和降低画面的刷 新频率。
需要说明的是, 在本文中, 诸如第一和第二等之类的关系术语仅仅用来将 一个实体或者操作与另一个实体或操作区分开来, 而不一定要求或者暗示这些 实体或操作之间存在任何这种实际的关系或者顺序。 而且, 术语 "包括"、 "包 含"或者其任何其他变体意在涵盖非排他性的包含, 从而使得包括一系列要素 的过程、 方法、 物品或者设备不仅包括那些要素, 而且还包括没有明确列出的 其他要素, 或者是还包括为这种过程、 方法、 物品或者设备所固有的要素。 对 于一结构被描述是在另一元素的"上面 /上"或"下面 / 下", 是指直接地或间接地 在该元素之上或下的情况, 而包含设置于其间的其它元素在没有更多限制的情 况下, 由语句 "包括一个…… "限定的要素, 并不排除在包括所述要素的过程、 方法、 物品或者设备中还存在另外的相同要素。
显然, 本发明的保护范围并不局限于上诉的具体实施方式, 本领域的技术 人员可以对发明进行各种改动和变型而不脱离本发明的精神和范围。 这样, 倘 若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则 本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求 书
1、 一种色序型液晶显示器的驱动方法, 用于驱动所述液晶显示器显示多幅 连续的画面, 所述液晶显示器中的每一像素单元包括一透明子像素、 一第一颜 色子像素以及一第二颜色子像素, 每一画面包括第一色场和第二色场, 其中, 该驱动方法包括步骤: 计算出每一画面的四像素灰阶值, 所述四像素灰阶包括白色像素灰阶值、 第一颜色像素灰阶值、 第二颜色像素灰阶值、 第三颜色像素灰阶值; 在第 n幅画面的第一色场时, 向所述像素单元提供白色背光源, 向所述透 明子像素输入第 n幅画面的白色像素灰阶值, 向所述第一颜色子像素输入第 n 幅画面的第一颜色像素灰阶值, 向所述第二颜色子像素输入第 n幅画面的第二 颜色像素灰阶值; 在第 n幅画面的第二色场时, 向所述像素单元提供第三颜色背光源, 向所 述透明子像素输入第 n幅画面的第三颜色像素灰阶值, 向所述第一颜色子像素 和第二颜色子像素输入一灰阶值使所述第一颜色子像素和第二颜色子像素保持 开启状态; 其中, n=l、 2、 3、 4……; 其中, 在第 0幅画面的第二色场时, 向所述第一颜色子像素输入第 1幅画 面的白色像素灰阶值, 向所述第二颜色子像素输入第 1幅画面的白色像素灰阶 值; 所述第 0幅画面是指所述液晶显示器在开启机器时的画面。
2、 根据权利要求 1所述的驱动方法, 其中, 在第 n幅画面的第二色场时, 向所述第一颜色子像素输入第 n+1幅画面的白色像素灰阶值, 向所述第二颜色 子像素输入第 n+1幅画面的白色像素灰阶值。
3、 根据权利要求 2所述的驱动方法, 其中, 所述第一颜色为绿色, 所述第 二颜色为蓝色, 所述第三颜色为红色。
4、根据权利要求 3所述的驱动方法,其中,采用 RGB三像素转换为 RGBW 四像素的方法计算每一画面的四像素灰阶值。
5、 根据权利要求 2所述的驱动方法, 其中, 所述第一颜色为绿色, 所述第 二颜色为红色, 所述第三颜色为蓝色。
6、根据权利要求 5所述的驱动方法,其中,采用 RGB三像素转换为 RGBW 四像素的方法计算每一画面的四像素灰阶值。
7、 根据权利要求 2所述的驱动方法, 其中, 所述第一颜色为蓝色, 所述第 二颜色为红色, 所述第三颜色为绿色。
8、根据权利要求 7所述的驱动方法,其中,采用 RGB三像素转换为 RGBW 四像素的方法计算每一画面的四像素灰阶值。
9、 一种色序型液晶显示器, 包括相对设置的液晶面板以及背光模组, 由所 述背光模组提供显示光源给所述液晶面板, 以使所述液晶面板显示画面; 其中, 所述液晶面板包括相对设置的薄膜晶体管基板和彩色滤光基板以及位于所述薄 膜晶体管基板和彩色滤光基板之间的液晶层, 其中, 所述彩色滤光基板中对应 每一像素单元设置有一透明光阻、 一第一颜色光阻以及一第二颜色光阻, 所述 背光模组包含第一背光源和第二背光源, 所述第一背光源为白色背光源, 所述 第二光源为第三颜色背光源, 其中, 该液晶显示器的驱动方法包括步骤: 计算出每一画面的四像素灰阶值, 所述四像素灰阶包括白色像素灰阶值、 第一颜色像素灰阶值、 第二颜色像素灰阶值、 第三颜色像素灰阶值; 在第 n幅画面的第一色场时, 向所述像素单元提供白色背光源, 向所述透 明子像素输入第 n幅画面的白色像素灰阶值, 向所述第一颜色子像素输入第 n 幅画面的第一颜色像素灰阶值, 向所述第二颜色子像素输入第 n幅画面的第二 颜色像素灰阶值; 在第 n幅画面的第二色场时, 向所述像素单元提供第三颜色背光源, 向所 述透明子像素输入第 n幅画面的第三颜色像素灰阶值, 向所述第一颜色子像素 和第二颜色子像素输入一灰阶值使所述第一颜色子像素和第二颜色子像素保持 开启状态; 其中, n=l、 2、 3、 4……; 其中, 在第 0幅画面的第二色场时, 向所述第一颜色子像素输入第 1幅画 面的白色像素灰阶值, 向所述第二颜色子像素输入第 1幅画面的白色像素灰阶 值; 所述第 0幅画面是指所述液晶显示器在开启机器时的画面。
10、 根据权利要求 9所述的色序型液晶显示器, 其中, 在第 n幅画面的第 二色场时, 向所述第一颜色子像素输入第 n+1幅画面的白色像素灰阶值, 向所 述第二颜色子像素输入第 n+1幅画面的白色像素灰阶值。
11、 根据权利要求 10所述的色序型液晶显示器, 其特征在于, 所述第一颜 色光阻为绿色光阻, 所述第二颜色光阻为蓝色光阻, 所述第三颜色背光源为红 色背光源。
12、 根据权利要求 11所述的色序型液晶显示器, 其中, 采用 RGB三像素 转换为 RGBW四像素的方法计算每一画面的四像素灰阶值。
13、 根据权利要求 10所述的色序型液晶显示器, 其特征在于, 所述第一颜 色光阻为绿色光阻, 所述第二颜色光阻为红色光阻, 所述第三颜色背光源为蓝 色背光源。
14、 根据权利要求 13所述的色序型液晶显示器, 其中, 采用 RGB三像素 转换为 RGBW四像素的方法计算每一画面的四像素灰阶值。
15、 根据权利要求 10所述的色序型液晶显示器, 其特征在于, 所述第一颜 色光阻为蓝色光阻, 所述第二颜色光阻为红色光阻, 所述第三颜色背光源为绿 色背光源。
16、 根据权利要求 15所述的色序型液晶显示器, 其中, 采用 RGB三像素 转换为 RGBW四像素的方法计算每一画面的四像素灰阶值。
PCT/CN2014/081402 2014-06-26 2014-07-01 色序型液晶显示器及其驱动方法 Ceased WO2015196500A1 (zh)

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