WO2016107492A1 - 显示屏及其驱动方法 - Google Patents

显示屏及其驱动方法 Download PDF

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Publication number
WO2016107492A1
WO2016107492A1 PCT/CN2015/098725 CN2015098725W WO2016107492A1 WO 2016107492 A1 WO2016107492 A1 WO 2016107492A1 CN 2015098725 W CN2015098725 W CN 2015098725W WO 2016107492 A1 WO2016107492 A1 WO 2016107492A1
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WIPO (PCT)
Prior art keywords
pixel
sub
pixels
display screen
driving circuit
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PCT/CN2015/098725
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English (en)
French (fr)
Inventor
川岛进吾
朱修剑
祝晓钊
王龙
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昆山国显光电有限公司
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Application filed by 昆山国显光电有限公司 filed Critical 昆山国显光电有限公司
Priority to JP2017534969A priority Critical patent/JP6581196B2/ja
Priority to EP15875170.1A priority patent/EP3242285A4/en
Priority to US15/537,272 priority patent/US10204541B2/en
Priority to KR1020177021125A priority patent/KR101970088B1/ko
Publication of WO2016107492A1 publication Critical patent/WO2016107492A1/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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/22—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
    • G09G3/30—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 using electroluminescent panels
    • G09G3/32—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 using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • 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

Definitions

  • the present invention relates to the field of flat panel display technologies, and in particular, to a display screen and a driving method of the display screen.
  • the resolution can be measured in PPI (pixels per inch).
  • PPI pixels per inch
  • the sub-pixels in the pixel unit need to be driven by the pixel driving circuit to emit light. Therefore, in order to improve the pixel resolution, in addition to requiring more pixel units per unit area, more is needed.
  • Pixel drive circuit In order to improve the pixel resolution, in addition to requiring more pixel units per unit area, more is needed.
  • the pixel unit size is smaller than 51 ⁇ 51 ( ⁇ m), and the sub-pixel size is smaller than 17 ⁇ 51 ( ⁇ m), and the pixel is
  • the circuit is generally composed of a plurality of thin film transistors (TFTs) and capacitors (such as a 6T2C circuit), and it is difficult for a conventional process to make a driving circuit that matches sub-pixels having a size smaller than 17 ⁇ 51 ( ⁇ m).
  • a driving method of the display screen is also provided.
  • a display screen includes a pixel structure and a pixel driving circuit
  • the pixel structure includes a plurality of pixel groups, each pixel group includes two or more pixel units, and the pixel unit includes a first sub-pixel and a second sub-pixel a pixel and a third sub-pixel, each of the first sub-pixel and the second sub-pixel being respectively connected to a first pixel driving circuit and a second pixel driving circuit, wherein all third sub-pixels in the same pixel group are connected to the same first Three-pixel drive circuit.
  • the first sub-pixel and the second sub-pixel are a red sub-pixel and a green sub-pixel, respectively, and the third sub-pixel is a blue sub-pixel.
  • the transport layer or the barrier layer of the red sub-pixel and the green sub-pixel shares the luminescent layer material of the blue sub-pixel.
  • the first sub-pixel and the second sub-pixel in the pixel group are arranged in rows and columns.
  • all of the third sub-pixels in the same pixel group are connected to each other.
  • the third pixel driving circuit is configured to receive luminance data of all third sub-pixels in the connected same pixel group, and drive all connected terminals according to the average brightness of all the luminance data. Three sub-pixels.
  • the structure of any two pixel groups is the same.
  • a driving method for a display screen includes the following steps:
  • each of the first and second pixel driving circuits respectively receiving the connected first and second sub-pixels Brightness data, and driving corresponding first and second sub-pixels according to the brightness data;
  • All third sub-pixels in the same pixel group are connected to the same third pixel driving circuit, and the third pixel driving circuit receives brightness data of all third sub-pixels in the connected same pixel group, according to a preset
  • the rule calculates the output brightness and drives all of the connected third sub-pixels according to the output brightness.
  • the preset rule is to calculate an average value.
  • all of the third sub-pixels in the same pixel group are connected to each other.
  • the display screen and the driving method thereof can enable a plurality of third sub-pixels in the same pixel group to be driven by the same brightness data by using a third pixel driving circuit, thereby saving the number of pixel driving circuits, thereby driving the pixel with high resolution. provide conditions.
  • FIG. 1 is a schematic diagram of the structure of a pixel group and a corresponding pixel driving circuit
  • FIG. 2 is a schematic diagram showing the structure of a pixel group and a corresponding pixel driving circuit of the first embodiment
  • 3(a) to 3(d) are the structure of the four pixel groups of the second embodiment and corresponding pixel driving Schematic diagram of the circuit;
  • FIG. 4 is a schematic diagram showing the structure of a pixel group and a corresponding pixel driving circuit of the third embodiment.
  • a display screen includes a pixel structure and a pixel driving circuit.
  • the pixel structure includes a plurality of pixel groups, each pixel group including two or more pixel units, the pixel unit including a first sub-pixel, a second sub-pixel, and a third sub-pixel.
  • the pixel driving circuit includes a plurality of first pixel driving circuits, a second pixel driving circuit, and a third pixel driving circuit. As shown in FIG. 1, it is a schematic diagram of the structure of one pixel group and the corresponding pixel driving circuit.
  • the pixel group 10 includes four pixel units 100, each of which includes a first sub-pixel 110, a second sub-pixel 120, and a third sub-pixel 130.
  • Each of the first sub-pixel 110 and the second sub-pixel 120 is connected to a first pixel driving circuit and a second pixel driving circuit, respectively.
  • all the third sub-pixels 130 in the pixel group 10 are connected to the same third pixel driving circuit.
  • the first sub-pixel 110 and the second sub-pixel 120 are respectively a red sub-pixel (R) and a green sub-pixel (G), and the third sub-pixel 130 is blue.
  • Subpixel (B) each red sub-pixel (R) in the pixel group is connected to one R pixel driving circuit, and each green sub-pixel (G) in the pixel group is connected to one G pixel driving circuit, all in the pixel group
  • the blue sub-pixels (B) are all connected to the same B pixel driving circuit.
  • the blue sub-pixel (B) may be vapor-deposited only at the blue sub-pixel position by using a shadow mask, or may be vapor-deposited at the entire pixel group position by using a shadow mask.
  • the invention also provides a driving method for a display screen, comprising the following steps:
  • Each of the first sub-pixel and the second sub-pixel are respectively associated with a first pixel driving circuit and a two-pixel driving circuit is connected, each of the first and second pixel driving circuits respectively receiving luminance data of the connected first and second sub-pixels, and driving the corresponding first and second sub-pixels according to the luminance data;
  • All third sub-pixels in the same pixel group are connected to the same third pixel driving circuit, and the third pixel driving circuit receives brightness data of all third sub-pixels in the connected same pixel group, according to the preset
  • the rules calculate the output brightness and drive all of the connected third sub-pixels according to the output brightness.
  • the preset rule is to calculate an average value. All of the luminance data to be received is also summed and averaged, and the luminance average is used to drive all of the third sub-pixels 130.
  • the human eye contains three kinds of cone cells, which are sensitive to red light, green light and blue light.
  • the relative densities of the three cones are different from each other, and the number of blue cones is far. Far less than the other two, only about 6%. Therefore, the human eye has different resolving power for various colors, the blue viewing angle is about 0.25°, and the red or green viewing angle is about 0.12°.
  • 0.25° corresponds to 1270 ⁇ m on the display, and if the pitch of the blue pixels is less than half (625 ⁇ m) of the pitch, the colors will mix without loss of image quality.
  • a plurality of blue sub-pixels in the same pixel group can be driven by the same pixel driving circuit using the same luminance data without substantially losing image quality. In this way, the number of pixel drive circuits can be saved, thereby providing conditions for high-resolution pixel drive.
  • the transmission layer or the barrier layer material of the red sub-pixel and the green sub-pixel may share the luminescent layer material of the blue sub-pixel, so that the space on the display screen can be further utilized to improve the pixel resolution.
  • first sub-pixel 110 and the second sub-pixel 120 in the pixel group 10 are arranged in a row and row.
  • the eight sub-pixels may form a 2 ⁇ 4 arrangement as shown in FIG. 1 .
  • the position of the third sub-pixel 130 may be relatively random, and is not fixed. It only needs to form the complete pixel unit 100 together with the corresponding first sub-pixel 110 and the four second sub-pixels 120 to complete the color display.
  • all of the third sub-pixels 130 in the pixel group 10 may be connected to each other, may be separated from each other, or may be a whole surface.
  • any two pixel groups of the display have the same structure.
  • the pixel structure of the display screen and the corresponding pixel driving circuit and the driving method of the display screen are exemplified below by several specific pixel group structures.
  • FIG. 2 is a diagram showing the structure of a pixel group and a corresponding pixel driving circuit of the first embodiment.
  • a pixel group there are 2 red sub-pixels and 2 green sub-pixels, respectively, and each of the red sub-pixels and the green sub-pixels corresponds to one pixel driving circuit (such as a 6T1C circuit).
  • the number and position of the blue sub-pixels are not limited, and various positions can be used. It is only necessary to ensure that each pair of red sub-pixels and green sub-pixels has blue sub-pixels to form one pixel unit. In this embodiment, the blue sub-pixels in the same pixel group are connected together.
  • the blue sub-pixels in the same pixel group may not be connected together, but may be independently evaporated in units of pixel units. However, no matter how the blue sub-pixels are arranged, the blue sub-pixels at different positions in the pixel group are connected to the same pixel driving circuit through the anode. There are five pixel drive circuits in the pixel group.
  • the conventional RGB collocated pixel arrangement has six pixel drive circuits, which reduces one pixel drive circuit compared to the conventional RGB collocated pixel arrangement.
  • the pixel structure in this embodiment includes a plurality of pixel groups as described above, and the present embodiment provides a display screen including the pixel structure and the pixel driving circuit as described above.
  • the embodiment further provides a driving method for the display screen, including the following steps:
  • Each of the red sub-pixels and the green sub-pixels in each pixel group are respectively connected to one red pixel driving circuit and a green pixel driving circuit, and each of the red pixel driving circuit and the green pixel driving circuit respectively receives the brightness of the connected sub-pixels Data, and driving corresponding sub-pixels according to the brightness data;
  • All blue sub-pixels in the same pixel group are connected to the same blue pixel driving circuit, and the same blue pixel driving circuit receives brightness data of all connected blue sub-pixels, and calculates an output according to a preset rule. Brightness, and driving all connected blue sub-pixels according to the output brightness.
  • the preset rule is to calculate an average value. All luminance data to be received is also summed and averaged, and the luminance average is used to drive all blue sub-pixels.
  • FIG. 3(a) to 3(d) show the structure of the four pixel groups of the second embodiment and the corresponding pixel driving circuits.
  • there are four pixel units in one pixel group that is, four red sub-pixels and four green sub-pixels in one pixel group.
  • each red The sub-pixel and the green sub-pixel each correspond to one pixel driving circuit (such as a 6T1C circuit).
  • the number and position of the blue sub-pixels are not limited, and various positions can be used. It is only necessary to ensure that each pair of red sub-pixels and green sub-pixels has blue sub-pixels to form one pixel unit.
  • the blue sub-pixels in the same pixel group are connected together. It can be understood that the blue sub-pixels in the same pixel group may not be connected together, but are independently evaporated in units of pixel units. It is also possible to vapor-deposit the entire surface in units of pixel groups.
  • 3(a) to 3(d) show the case where the blue sub-pixels are in four different positions and numbers. 3(a) and 3(c) each have two mutually independent blue sub-pixels, wherein each blue sub-pixel is mated with two pairs of red sub-pixels and green sub-pixels arranged in a row.
  • Figure 3 (b) and Figure 3 (d) both have two blue sub-pixels connected to each other, which are based on the structure of Figure 3 (a) or Figure 3 (c). Pixels are formed by connecting different locations. The connected portion can also be made of a material of a blue sub-pixel. There are a total of nine pixel drive circuits in the pixel group.
  • the conventional RGB collocated pixel arrangement has 12 pixel drive circuits, which reduces the number of pixel drive circuits compared to the conventional RGB collocated pixel arrangement.
  • the pixel structure in this embodiment includes a plurality of pixel groups as described above, and the present embodiment provides a display screen including the pixel structure and the pixel driving circuit as described above.
  • the embodiment also provides a driving method for the display screen, which is similar to the driving method of the first embodiment, and details are not described herein again.
  • FIG. 4 is a diagram showing the structure of a pixel group and a corresponding pixel driving circuit of the third embodiment.
  • the pixel group of this embodiment contains more pixel units.
  • in one pixel group there are 16 red sub-pixels and 16 green sub-pixels, respectively, and each of the red sub-pixels and the green sub-pixels corresponds to one pixel driving circuit (such as a 6T1C circuit).
  • the number and position of the blue sub-pixels are not limited, and various positions can be used. It is only necessary to ensure that each pair of red sub-pixels and green sub-pixels has blue sub-pixels to form one pixel unit.
  • the blue sub-pixels in the same pixel group are connected together.
  • the blue sub-pixels in the same pixel group may not be connected together, but are independently evaporated in units of pixel units. It is also possible to vapor-deposit the entire surface in units of pixel groups. However, no matter how the blue sub-pixels are arranged, the blue sub-pixels at different positions in the pixel group are connected to the same pixel driving circuit through the anode. There are a total of 33 pixel drive circuits in the pixel group. Traditional RGB collocated pixel arrangement has 48 pixel drives The dynamic circuit reduces the number of 15 pixel drive circuits compared to the conventional RGB collocated pixel arrangement.
  • the pixel structure in this embodiment includes a plurality of pixel groups as described above, and the present embodiment provides a display screen including the pixel structure and the pixel driving circuit as described above.
  • the embodiment also provides a driving method for the display screen, which is similar to the driving method of the first embodiment, and details are not described herein again.
  • n red sub-pixels and n green sub-pixels may also be included in one pixel group.
  • n-1 pixel drive circuits can be reduced compared to conventional RGB collocated pixel arrangements.
  • n is an integer greater than one.
  • the embodiment of the present invention and the accompanying drawings illustrate the technical solution in which the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.
  • the present invention is not limited thereto.
  • the first sub-pixel may also be green or blue
  • the second sub-pixel may also be red or blue
  • the third sub-pixel may also be red or green.
  • the display screen and the driving method thereof can enable a plurality of third sub-pixels in the same pixel group to be driven by the same pixel driving circuit using the same luminance data, thereby saving the number of pixel driving circuits and thereby achieving high resolution.
  • the rate of pixel drive provides conditions.

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  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
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Abstract

一种显示屏及其驱动方法，其中显示屏包括像素结构和像素驱动电路，像素结构包括多个像素组（10），每个像素组（10）包括两个以上的像素单元（100），每个像素单元（100）包括第一子像素（110）、第二子像素（120）和第三子像素（130），每个第一子像素（110）和第二子像素（120）分别连接一个第一像素驱动电路和第二像素驱动电路，同一像素组（10）中所有的第三子像素（130）均连接同一个第三像素驱动电路。显示屏中同一像素组中的多个第三子像素（130）用一个第三像素驱动电路使用同一亮度数据驱动，节省了像素驱动电路的数量，从而为高分辨率的像素驱动提供条件。

Description

显示屏及其驱动方法 技术领域
本发明涉及平板显示技术领域，特别是涉及一种显示屏和一种该显示屏的驱动方法。
背景技术
随着技术的发展，用户对显示分辨率的需求越来越高。分辨率可以采用PPI(pixels per inch，每英寸像素数)来衡量。根据显示原理可知，像素单元中的子像素都需要使用像素驱动电路来驱动进而发光，因此，为了提高像素分辨率，除了需要在单位面积内容纳更多的像素单元之外，也需要更多的像素驱动电路。
以传统的RGB子像素并置排列的显示屏为例，要想实现500PPI以上的分辨率，像素单元尺寸要小于51×51(μm)，子像素尺寸要小于17×51(μm)，而像素电路一般由多个薄膜晶体管(TFT)和电容构成(如6T2C电路)，传统的工艺难以做出匹配尺寸小于17×51(μm)以下子像素的驱动电路。
发明内容
基于此，有必要提供一种相比传统电路可以节省像素驱动电路数量的显示屏。
还提供一种显示屏的驱动方法。
一种显示屏，包括像素结构和像素驱动电路，所述像素结构包括多个像素组，每个像素组包括两个或两个以上像素单元，所述像素单元包括第一子像素、第二子像素和第三子像素，每个所述第一子像素和第二子像素分别连接一个第一像素驱动电路和第二像素驱动电路，同一像素组中所有的第三子像素均连接同一个第三像素驱动电路。
在其中一个实施例中，所述第一子像素和第二子像素分别为红色子像素和绿色子像素，所述第三子像素为蓝色子像素。
在其中一个实施例中，所述红色子像素和绿色子像素的传输层或者阻挡层 材料共用蓝色子像素的发光层材料。
在其中一个实施例中，所述像素组中的第一子像素和第二子像素成行列排布。
在其中一个实施例中，同一像素组中所有的第三子像素相互连接。
在其中一个实施例中，所述第三像素驱动电路用于接收所连接的同一像素组中的所有第三子像素的亮度数据，并根据所有的亮度数据的平均亮度来驱动所连接的所有第三子像素。
在其中一个实施例中，任意两个像素组的结构相同。
一种显示屏的驱动方法，包括如下步骤：
将显示屏的像素结构划分为多个像素组，每个像素组包括两个以上的像素单元，所述像素单元包括第一子像素、第二子像素和第三子像素；
将所述第一子像素和第二子像素分别与一个第一像素驱动电路和第二像素驱动电路连接，每个第一和第二像素驱动电路分别接收所连接的第一和第二子像素的亮度数据，并根据亮度数据驱动相应的第一和第二子像素；
将同一像素组中所有的第三子像素与同一个第三像素驱动电路连接，所述第三像素驱动电路接收所连接的同一像素组中的所有第三子像素的亮度数据，根据预设的规则计算输出亮度，并根据所述输出亮度驱动所连接的所有的第三子像素。
在其中一个实施例中，所述预设的规则为计算平均值。
在其中一个实施例中，所述同一像素组中所有的第三子像素相互连接。
上述显示屏及其驱动方法，可以使同一像素组中的多个第三子像素用一个第三像素驱动电路使用同一亮度数据驱动，节省了像素驱动电路的数量，从而为高分辨率的像素驱动提供条件。
附图说明
图1为一个像素组的结构和相应的像素驱动电路的示意图；
图2为第一实施例的一种像素组的结构和相应的像素驱动电路的示意图；
图3(a)～图3(d)为第二实施例的四种像素组的结构和相应的像素驱动 电路的示意图；
图4为第三实施例的一种像素组的结构和相应的像素驱动电路的示意图。
具体实施方式
以下结合附图和实施例进行进一步说明。
一种显示屏，包括像素结构和像素驱动电路。所述像素结构包括多个像素组，每个像素组包括两个或两个以上的像素单元，所述像素单元包括第一子像素、第二子像素和第三子像素。所述像素驱动电路包括多个第一像素驱动电路、第二像素驱动电路和第三像素驱动电路。如图1所示，为其中一个像素组的结构和相应的像素驱动电路的示意图。该像素组10包括4个像素单元100，每个像素单元100包括第一子像素110、第二子像素120和第三子像素130。每个第一子像素110和第二子像素120分别连接一个第一像素驱动电路和第二像素驱动电路。同时，该像素组10中所有的第三子像素130均连接同一个第三像素驱动电路。
具体地，如图1所示，所述像素组中，第一子像素110和第二子像素120分别为红色子像素(R)和绿色子像素(G)，第三子像素130为蓝色子像素(B)。则所述像素组中的每个红色子像素(R)连接一个R像素驱动电路，所述像素组中的每个绿色子像素(G)连接一个G像素驱动电路，所述像素组中的所有蓝色子像素(B)均连接同一个B像素驱动电路。其中，所述蓝色子像素(B)可以是利用掩膜板(shadow mask)只在蓝色子像素位置蒸镀，也可以是利用掩膜板(shadow mask)在整个像素组位置蒸镀，亦可以是利用掩膜板(open mask)在像素结构位置整面蒸镀。需要说明的是，无论蓝色子像素(B)以什么方式蒸镀，其都是以像素组为单位连接到一个B像素驱动电路，也就是说，每个像素组中的所有蓝色子像素(B)均连接同一个B像素驱动电路。
本发明还提供一种显示屏的驱动方法，包括如下步骤：
将显示屏的像素结构划分为多个像素组，每个像素组包括两个或两个以上的像素单元，所述像素单元包括第一子像素、第二子像素和第三子像素；
将每个所述的第一子像素和第二子像素分别与一个第一像素驱动电路和第 二像素驱动电路连接，每个第一和第二像素驱动电路分别接收所连接的第一和第二子像素的亮度数据，并根据亮度数据驱动相应的第一和第二子像素；
将同一像素组中所有的第三子像素与同一个第三像素驱动电路连接，所述第三像素驱动电路接收所连接的同一像素组中的所有的第三子像素的亮度数据，根据预设的规则计算输出亮度，并根据所述输出亮度驱动所连接的所有的第三子像素。优选的，预设的规则为计算平均值。也即将接收到的所有亮度数据加和后平均，将亮度平均值用于驱动所有的第三子像素130。
根据对人的视角特性的研究可知：人眼含有三种视锥细胞，分别对红光、绿光和蓝光敏感，这三种视锥细胞的相对密度彼此不同，其中蓝色视锥细胞数量远远少于其他两种，只有约6％。因此人眼对各种颜色的分辨能力不一样，蓝色视角大约为0.25°，红色或绿色视角大约为0.12°。例如，在30cm的视距下，0.25°对应于显示器上的1270μm，如果蓝色像素的间距小于该间距的一半(625μm)，颜色将会混合，而不会损失图像质量。所以即使将蓝光的分辨率降低数倍，也不影响人眼对画质的感受。因此，根据人眼对蓝色不敏感的特性，可以使同一像素组中的多个蓝色子像素用同一个像素驱动电路使用同一亮度数据驱动，而基本上不会损失画质。这样，可以节省像素驱动电路的数量，从而为高分辨率的像素驱动提供条件。
进一步地，红色子像素和绿色子像素的传输层或者阻挡层材料可以共用蓝色子像素的发光层材料，这样可以进一步利用显示屏上的空间，提高像素分辨率。
进一步地，像素组10中的第一子像素110和第二子像素120成行列排布。例如4个像素单元100一共包括4个第一子像素110和4个第二子像素120，则这8个子像素可以构成如图1所示的2×4的排列。第三子像素130的位置可以比较随意，并不固定，只需要其与对应的第一子像素110和4个第二子像素120一起构成完整的像素单元100以完成色彩显示即可。
进一步地，像素组10中所有的第三子像素130可以相互连接，也可以相互分离，还可以是一整面。
为便于制作，显示屏的任意两个像素组的结构相同。
以下以几个具体的像素组结构举例说明显示屏的像素结构和相应的像素驱动电路以及显示屏的驱动方法。
图2为第一实施例的一种像素组的结构和相应的像素驱动电路。在一个像素组内，分别有2个红色子像素和2个绿色子像素，且每个红色子像素和绿色子像素各对应一个像素驱动电路(如6T1C电路)。蓝色子像素数量和位置不限定，可以采用多种位置，只需要保证每一对红色子像素和绿色子像素都有蓝色子像素组成一个像素单元。本实施例中，同一像素组中的蓝色子像素连接在一起，可以理解的是，同一像素组中的蓝色子像素也可以不连接在一起，而是以像素单元为单位独立蒸镀。但无论蓝色子像素以什么方式排列，像素组内不同位置的蓝色子像素都通过阳极连接到同一像素驱动电路。该像素组内共有5个像素驱动电路。传统的RGB并置像素排列方式有6个像素驱动电路，与传统的RGB并置像素排列方式相比，减少1个像素驱动电路。
本实施例中的像素结构包括多个如上所述的像素组，本实施例提供一种显示屏，包括如上所述的像素结构和像素驱动电路。
本实施例还提供一种显示屏的驱动方法，包括如下步骤：
将显示屏的像素结构划分为多个像素组，每个像素组包括两个像素单元，所述像素单元包括红色子像素、绿色子像素和蓝色子像素；
将每个像素组中的每个红色子像素和绿色子像素分别与一个红色像素驱动电路和绿色像素驱动电路连接，每个红色像素驱动电路和绿色像素驱动电路分别接收所连接的子像素的亮度数据，并根据亮度数据驱动相应的子像素；
将同一像素组中所有的蓝色子像素与同一个蓝色像素驱动电路连接，所述同一蓝色像素驱动电路接收所连接的所有的蓝色子像素的亮度数据，根据预设的规则计算输出亮度，并根据所述输出亮度驱动所连接的所有的蓝色子像素。优选的，预设的规则为计算平均值。也即将接收到的所有亮度数据加和后平均，将亮度平均值用于驱动所有的蓝色子像素。
图3(a)～图3(d)为第二实施例的四种像素组的结构和相应的像素驱动电路。在本实施例中，如图3(a)～图3(d)所示，一个像素组内有4个像素单元，即一个像素组内分别有4个红色子像素和4个绿色子像素，且每个红色 子像素和绿色子像素各对应一个像素驱动电路(如6T1C电路)。蓝色子像素数量和位置不限定，可以采用多种位置，只需要保证每一对红色子像素和绿色子像素都有蓝色子像素组成一个像素单元。本实施例中，同一像素组中的蓝色子像素连接在一起，可以理解的是，同一像素组中的蓝色子像素也可以不连接在一起，而是以像素单元为单位独立蒸镀，也可以是以像素组为单位整面蒸镀。图3(a)～图3(d)示出了蓝色子像素处于4种不同位置和数量的情形。图3(a)和图3(c)都具有两个相互独立的蓝色子像素，其中每个蓝色子像素与排成一行的两对红色子像素和绿色子像素配合。但无论蓝色子像素以什么方式排列，像素组内不同位置的蓝色子像素都通过阳极连接到同一像素驱动电路。图3(b)和图3(d)都具有两个相互连接起来的蓝色子像素，其都是在图3(a)或图3(c)的结构的基础上把独立的蓝色子像素从不同的位置连接起来形成。连接的部分也可采用蓝色子像素的材料。该像素组内共有9个像素驱动电路。传统的RGB并置像素排列方式有12个像素驱动电路，与传统的RGB并置像素排列方式相比，减少3个像素驱动电路。
本实施例中的像素结构包括多个如上所述的像素组，本实施例提供一种显示屏，包括如上所述的像素结构和像素驱动电路。
本实施例还提供一种显示屏的驱动方法，与第一实施例的驱动方法类似，此处不再赘述。
图4为第三实施例的一种像素组的结构和相应的像素驱动电路。本实施例的像素组包含更多的像素单元。如图4所示，在一个像素组内，分别有16个红色子像素和16个绿色子像素，且每个红色子像素和绿色子像素各对应一个像素驱动电路(如6T1C电路)。蓝色子像素数量和位置不限定，可以采用多种位置，只需要保证每一对红色子像素和绿色子像素都有蓝色子像素组成一个像素单元。本实施例中，同一像素组中的蓝色子像素连接在一起，可以理解的是，同一像素组中的蓝色子像素也可以不连接在一起，而是以像素单元为单位独立蒸镀，也可以是以像素组为单位整面蒸镀。但无论蓝色子像素以什么方式排列，此像素组内不同位置的蓝色子像素都通过阳极连接到同一像素驱动电路。该像素组内共有33个像素驱动电路。传统的RGB并置像素排列方式有48个像素驱 动电路，与传统的RGB并置像素排列方式相比，减少15个像素驱动电路。
本实施例中的像素结构包括多个如上所述的像素组，本实施例提供一种显示屏，包括如上所述的像素结构和像素驱动电路。
本实施例还提供一种显示屏的驱动方法，与第一实施例的驱动方法类似，此处不再赘述。
可以理解，在一个像素组内，还可以包括其他数量的n个红色子像素和n个绿色子像素。这样，与传统的RGB并置像素排列方式相比，可以减少n-1个像素驱动电路。其中n是大于1的整数。
本发明的实施例和附图以第一子像素为红色子像素、第二子像素为绿色子像素、第三子像素为蓝色子像素为例说明技术方案，但本发明并不限于此，例如，第一子像素也可以为绿色或蓝色，第二子像素也可以为红色或蓝色，第三子像素也可以为红色或绿色。
综上所述，上述显示屏及其驱动方法，可以使同一像素组中的多个第三子像素用同一个像素驱动电路使用同一亮度数据驱动，节省了像素驱动电路的数量，从而为高分辨率的像素驱动提供条件。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种显示屏，包括像素结构和像素驱动电路，所述像素结构包括多个像素组，每个像素组包括两个或两个以上像素单元，所述像素单元包括第一子像素、第二子像素和第三子像素，每个所述第一子像素和第二子像素分别连接一个第一像素驱动电路和第二像素驱动电路，同一像素组中所有的第三子像素均连接同一个第三像素驱动电路。
  2. 根据权利要求1所述的显示屏，其特征在于，所述第一子像素和第二子像素分别为红色子像素和绿色子像素，所述第三子像素为蓝色子像素。
  3. 根据权利要求2所述的显示屏，其特征在于，所述红色子像素和绿色子像素的传输层或者阻挡层材料共用蓝色子像素的发光层材料。
  4. 根据权利要求1所述的显示屏，其特征在于，所述像素组中的第一子像素和第二子像素成行列排布。
  5. 根据权利要求1所述的显示屏，其特征在于，同一像素组中所有的第三子像素相互连接。
  6. 根据权利要求1所述的显示屏，其特征在于，所述第三像素驱动电路用于接收所连接的同一像素组中的所有第三子像素的亮度数据，并根据所有的亮度数据的平均亮度来驱动所连接的所有第三子像素。
  7. 根据权利要求1所述的显示屏，其特征在于，任意两个像素组的结构相同。
  8. 一种显示屏的驱动方法，包括如下步骤：
    将显示屏的像素结构划分为多个像素组，每个像素组包括两个或两个以上像素单元，所述像素单元包括第一子像素、第二子像素和第三子像素；
    将每个所述第一子像素和第二子像素分别与一个第一像素驱动电路和第二像素驱动电路连接，每个第一和第二像素驱动电路分别接收所连接的第一和第二子像素的亮度数据，并根据亮度数据驱动相应的第一和第二子像素；
    将同一像素组中所有的第三子像素与同一个第三像素驱动电路连接，所述 第三像素驱动电路接收所连接的同一像素组中的所有第三子像素的亮度数据，根据预设的规则计算输出亮度，并根据所述输出亮度驱动所连接的所有第三子像素。
  9. 根据权利要求8所述的显示屏的驱动方法，其特征在于，所述预设的规则为计算平均值。
  10. 根据权利要求8所述的显示屏的驱动方法，其特征在于，所述同一像素组中所有的第三子像素相互连接。
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