WO2015196610A1 - 显示面板及其驱动方法和显示装置 - Google Patents

显示面板及其驱动方法和显示装置 Download PDF

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Publication number
WO2015196610A1
WO2015196610A1 PCT/CN2014/087899 CN2014087899W WO2015196610A1 WO 2015196610 A1 WO2015196610 A1 WO 2015196610A1 CN 2014087899 W CN2014087899 W CN 2014087899W WO 2015196610 A1 WO2015196610 A1 WO 2015196610A1
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Prior art keywords
pixel
driving circuits
display panel
group
pixel driving
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PCT/CN2014/087899
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English (en)
French (fr)
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吴海东
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京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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Priority to EP14882140.8A priority Critical patent/EP3163565B1/en
Priority to US14/768,919 priority patent/US9754525B2/en
Publication of WO2015196610A1 publication Critical patent/WO2015196610A1/zh

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    • 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225Control 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] organic, e.g. using organic light-emitting diodes [OLED] 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
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/0426Layout of electrodes and connections
    • 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
    • G09G2310/0264Details of driving circuits
    • G09G2310/0281Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
    • 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
    • G09G2320/0223Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
    • 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
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • 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
    • 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275Details of drivers for data electrodes

Definitions

  • Embodiments of the present invention relate to a display panel, a driving method thereof, and a display device.
  • an Organic Light Emitting Diode is a current-type light-emitting device because of its self-luminous, fast response, wide viewing angle, and the ability to be fabricated on a flexible substrate. The more it is used in the field of high performance display.
  • At least one embodiment of the present invention provides an OLED display panel capable of making display brightness uniform and a method of driving the display panel.
  • At least one embodiment of the present invention provides a display panel including a first group of pixel driving circuits and a second group of pixel driving circuits; and a working voltage line of one pixel column in each two adjacent pixel columns of each primary color Accessing the first group of pixel driving circuits, the access point is located on the side of the pixel of the first row of the pixel array; the working voltage line of the other pixel column is connected to the second group of pixel driving circuits, and the access point is located at the end of the pixel array The side on which a row of pixels is located.
  • At least one embodiment of the present invention further provides a driving method of a display panel, wherein the display panel is provided with two sets of pixel driving circuits, the method comprising: for every two adjacent pixels of each primary color of the display panel Column, the working voltage of one of the pixel columns is connected to the first group of pixel driving circuits, the access point is located on the side of the pixel of the first row of the pixel array; the operating voltage of the other pixel column is connected to the second group of pixels In the driving circuit, the access point is located on the side of the pixel of the last row of the pixel array; the operating voltages of the two sets of pixel driving circuits are the same.
  • At least one embodiment of the present invention provides a display device comprising the display panel of any of the above.
  • 1 is a schematic structural view of a display panel
  • FIG. 2 is a schematic structural view of a display panel provided by the present invention.
  • FIG. 1 is a schematic diagram of an OLED product.
  • the circuit for driving pixels (including a red driving circuit, a green driving circuit, and a blue driving circuit) is generally disposed at the top of the display screen, and the working voltage line of each column is used for The pixel compensation circuit of the column of pixels provides the operating voltage.
  • the inventors have found that since the working voltage line itself has a certain line resistance, this causes a voltage drop, and the brightness of the pixel unit closer to the driving circuit is higher, and the distance is higher.
  • the pixel unit that is farther from the driving circuit has lower brightness, which causes a problem of uneven display brightness.
  • At least one embodiment of the present invention provides a display panel, as shown in FIG. 2, including two sets of pixel driving circuits 110 and 120 and an array substrate on which a pixel array 200 is formed, and the pixel array 200 includes different primary colors (for example, A pixel column of red, green, and blue, each pixel column including a plurality of sub-pixel units corresponding to the primary color.
  • the example shown in FIG. 2 includes different primary colors (for example, A pixel column of red, green, and blue, each pixel column including a plurality of sub-pixel units corresponding to the primary color.
  • pixel 2 includes 15 pixel columns, each of which includes a case of 5 rows of sub-pixel units, wherein columns 211-215 are red pixel columns, columns 221-225 are green pixel columns, and columns 231 - 235 is a blue pixel column; of course, in actual application, the number of pixel columns is much larger than 15 columns, and the number of rows is originally greater than 5 rows, but the implementation principle is the same as that in FIG. 2, and the embodiment of the present invention is only combined with FIG. Description.
  • a working voltage line of one pixel column is connected to the first group of pixel driving circuits 110, and the access point is located in the first row (first row) of the pixel array.
  • One side of the pixel column is connected to the second group of pixel driving circuits 120, and the access point is located on the side of the last row (fifth row) of the pixel array.
  • the pixel columns 211, 213, 215 The working voltage line is connected to the driving circuit 110, and the access point is located on the side where the pixels of the first row are located, that is, above the pixels of the first row; the working voltage lines of the pixel columns 212, 214 are connected to the driving circuit 120, and the access point Located on the side of the fifth row of pixels, below the fifth row of pixels.
  • connection mode of the working voltage line and the pixel compensation circuit of each pixel can be the same as the known technique.
  • the pixel compensation circuit of each pixel of one pixel column is connected to the operating voltage line of the pixel column in parallel.
  • the sum of the operating voltages corresponding to the sub-pixel units is:
  • any two sub-pixel units of the same color adjacent in the row direction have a sum of operating voltages which is a constant value independent of the number of rows.
  • the sum of the luminances of any two sub-pixel units of the same color adjacent in the row direction is maintained at a constant value.
  • a display panel includes two sets of pixel driving circuits; and in each two adjacent pixel columns of each primary color, a working voltage line of one pixel column is connected to the first group of pixel driving circuits, and is connected The in-point is located on the side of the first row of pixels of the pixel array; the working voltage line of the other pixel column is connected to the second group of pixel driving circuits, and the access point is located on the side of the last row of pixels of the pixel array.
  • the sum of the distances of any two adjacent pixels belonging to the same primary color to the pixel driving circuit is a constant value, and since the distance to the pixel driving circuit finally determines the operating voltage of the pixel, the The sum of the operating voltages of two adjacent pixels is a constant value, so that the sum of the brightnesses of the two light-emitting elements corresponding to any two adjacent pixels belonging to the same primary color is equal, thereby The display brightness of the entire display panel is uniform.
  • the first group of pixel driving circuits 110 are disposed on a side of a first row of pixels in the display panel, and the second group of pixel driving circuits 120 are disposed in a last row of the display panel. The side where the pixel is located.
  • the above arrangement has the advantage that the driving circuit can be arranged separately to reduce the thickness of the display panel, and on the other hand, the pixel driving circuit can be brought close to the driven pixel column as much as possible, thereby reducing the voltage drop on the transmission line, and further Reduce losses.
  • each odd pixel column of each primary color is connected to the first group of pixel driving circuits 110, and each even pixel column is connected to the second group of pixel driving circuits 120.
  • the pixel driving circuits to which the odd (even) columns of the respective primary colors are connected may also be different.
  • the odd column of the red pixel can be connected to the first pixel driving circuit, and the even column is connected to the second pixel driving circuit; and the odd columns of the blue and green pixels are all connected to the second pixel driving circuit, and the even columns can be accessed.
  • the first pixel driving circuit can implement the implementation of the present invention as long as the operating voltage lines of the adjacent two pixel columns of the same primary color are respectively connected to different pixel driving circuits from one side of the first row of pixels and one side of the last row of pixels.
  • the display panel includes three primary colors, and each set of pixel driving circuits includes three sub-driving circuits, namely, a red driving circuit, a green driving circuit, and a blue driving circuit;
  • the working voltage lines of each of the sub-drive circuits of the group of pixel driving circuits are connected to respective odd pixel columns of one primary color, and the operating voltage lines of each of the sub-driving circuits of the second group of pixel driving circuits and the even numbers of one primary color The pixel columns are connected.
  • N can also take other values greater than 3 in practical applications.
  • the technical solution provided by at least one embodiment of the present invention is also applicable to a four-primary color or other multi-primary color display panel.
  • the display panel is an active matrix organic light emitting diode active matrix organic light emitting diode or an active matrix organic light emitting diode (AMOLED). )panel.
  • AMOLED active matrix organic light emitting diode
  • At least one embodiment of the present invention further provides a method of driving a display panel, wherein the display panel is provided with two sets of pixel driving circuits, and the method includes:
  • Step S1 for every two adjacent pixel columns of each primary color of the display panel, the working voltage of one of the pixel columns is connected to the first group of pixel driving circuits, and the access point is located in the first row of the pixel array.
  • step S2 the operating voltages of the two groups of pixel driving circuits are the same.
  • the operating voltage of each of the odd pixel columns is connected to the first group of pixel driving circuits, and the operating voltage of each of the even pixel columns is connected to the second The group of pixel driving circuits; or, the operating voltage of each of the odd pixel columns is connected to the second group of pixel driving circuits, and the operating voltage of each of the even pixel columns is connected to the first group of pixel driving circuits.
  • At least one embodiment of the present invention provides a display device comprising the display panel of any of the above.
  • the display device of the embodiment of the present invention may be any product or component having a display function such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a watch, and the like.
  • a display function such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a watch, and the like.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

一种显示面板及其驱动方法和显示装置,该显示面板包括两组像素驱动电路。且每一种基色的每两个相邻像素列中,一个像素列的工作电压线接入一组像素驱动电路(110),接入点位于像素阵列(200)的第一行像素所在的一侧。另一个像素列的工作电压线接入另一组像素驱动电路(120),接入点位于像素阵列(200)的最后一行像素所在的一侧。该显示面板能够使整个显示面板的显示亮度均匀。

Description

显示面板及其驱动方法和显示装置 技术领域
本发明的实施例涉及一种显示面板及其驱动方法和显示装置。
背景技术
对于显示装置而言,有机发光二极管(Organic Light Emitting Diode,OLED)作为一种电流型发光器件,因其所具有的自发光、快速响应、宽视角和可制作在柔性衬底上等特点而越来越多地被应用于高性能显示领域当中。
发明内容
本发明的至少一实施例提出一种能够使显示亮度均匀的OLED显示面板以及驱动显示面板的方法。
本发明至少一实施例提供了一种显示面板,包括第一组像素驱动电路和第二组像素驱动电路;且每一种基色的每两个相邻像素列中,一个像素列的工作电压线接入第一组像素驱动电路,接入点位于像素阵列的第一行像素所在的一侧;另一个像素列的工作电压线接入第二组像素驱动电路,接入点位于像素阵列的最后一行像素所在的一侧。
本发明至少一实施例还提供了一种显示面板的驱动方法,该显示面板中设置有两组像素驱动电路,该方法包括:对于所述显示面板的每一种基色的每两个相邻像素列,将其中一个像素列的工作电压接入到第一组像素驱动电路,接入点位于像素阵列的第一行像素所在的一侧;将另一个像素列的工作电压接入第二组像素驱动电路,接入点位于像素阵列的最后一行像素所在的一侧;使两组像素驱动电路向接入的工作电压相同。
本发明至少一实施例还提供了一种显示装置,包括上述任一项所述的显示面板。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例的附图作简单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例,而非对本发明的限制。
图1为一种显示面板的结构示意图;
图2为本发明提供的显示面板的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例的附图,对本发明实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。基于所描述的本发明的实施例,本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图1所示为一种OLED产品的示意图,驱动像素的电路(包括红色驱动电路、绿色驱动电路和蓝色驱动电路)一般设置在显示屏的顶部,并通过每一列的工作电压线为该列像素的像素补偿电路提供工作电压。对于如图1所示的OLED产品,发明人发现,由于工作电压线本身存在一定的线阻,这样会导致压降的产生,对于距离驱动电路较近的像素单元,其亮度较高,而距离驱动电路较远的像素单元,亮度较低,这造成了显示亮度不均匀的问题。
本发明至少一实施例提供了一种显示面板,如图2所示,包括两组像素驱动电路110和120以及阵列基板,阵列基板上形成有像素阵列200,像素阵列200包括不同基色(例如,红色、绿色、蓝色)的像素列,每个像素列中包含多个对应于该基色的亚像素单元。图2中示出的示例包含15个像素列,每一个像素列包含5行亚像素单元的一种情况,其中,列211-215为红色像素列、列221-225为绿色像素列、列231-235为蓝色像素列;当然实际应用中,像素列的数目要远大于15列,且行数原大于5行,但是其实现原理与图2中的一致,本发明实施例仅结合图2进行说明。每一种基色的任意两个相邻的像素列中,有一个像素列的工作电压线接入第一组像素驱动电路110,接入点位于像素阵列的第一行(第一行)像素所在的一侧;另一个像素列的工作电压线接入第二组像素驱动电路120,接入点位于像素阵列的最后一行(第五行)像素所在的一侧。以红色像素列为例,像素列211、213、215的 工作电压线接入驱动电路110,且接入点位于第一行像素所在的一侧,即第一行像素的上方;像素列212、214的工作电压线接入驱动电路120,且接入点位于第五行像素所在的一侧,即第五行像素的下方。
本发明实施例中工作电压线与各个像素的像素补偿电路的连接方式可以采用与已知技术相同的方式。如图1或2所示,一个像素列的各个像素的像素补偿电路通过并联方式连接到该像素列的工作电压线。
结合图2对本发明实施例的原理进行说明,假设两个像素驱动单元分别提供初始电压为ELVDD1和ELVDD2的工作电压,并假设经过一个像素后工作电压下降△V,则对于接入第一像素驱动单元100的所有的第M行像素,其工作电压为ELVDD1-(M-1)△V(比如图中的奇数列像素,其第1、2、3、4、5行的工作电压为ELVDD1、ELVDD1-△V、ELVDD1-2△V、ELVDD1-3△V、ELVDD1-4△V),相应的对于接入第二像素驱动单元的所有的第M行像素,其工作电压为ELVDD2-(5-M)△V(比如图中的偶数列像素,其第1、2、3、4、5行的工作电压为(ELVDD2-4△V、ELVDD2-3△V、ELVDD2-2△V、ELVDD2-△V、ELVDD2),而由于任意两个在行方向上相邻的同一颜色的亚像素单元,会分别接入第一像素驱动电路和第二像素驱动电路,则相邻的同一颜色的两个亚像素单元对应的工作电压之和为:
V0=ELVDD1-(M-1)△V+ELVDD2-(5-M)△V=ELVDD1+ELVDD2-4△V。
也就是说任意两个在行方向上相邻的同一颜色的亚像素单元,其工作电压之和为与其行数无关的定值。这样,在发光显示时,任意两个在行方向上相邻的同一颜色的亚像素单元的亮度之和会维持为恒定值。从而保证了显示面板发光的均匀性。
本发明至少一实施例提供的显示面板,包括两组像素驱动电路;且每一种基色的每两个相邻像素列中,一个像素列的工作电压线接入第一组像素驱动电路,接入点位于像素阵列的第一行像素所在的一侧;另一个像素列的工作电压线接入第二组像素驱动电路,接入点位于像素阵列的最后一行像素所在的一侧。这样在每一行的位置,属于同一基色的任意两个相邻像素到像素驱动电路的距离的和都是一个定值,则由于到像素驱动电路的距离最终决定像素的工作电压,则所述的两个相邻像素的工作电压之和为定值,使得属于同一基色的任意两个相邻像素对应的两个发光元件的亮度之和相等,从而使 整个显示面板的显示亮度均匀。
在本发明至少一实施例中,如图2所示,第一组像素驱动电路110设置在显示面板中第一行像素所在的一侧,第二组像素驱动电路120设置在显示面板中最后一行像素所在的一侧。
上述设置的做的好处是,一方面可以将驱动电路分开布置,降低显示面板的厚度,另一方面可以尽可能的使像素驱动电路靠近所驱动的像素列,减少在传输线路上的压降,进而降低损耗。
不难理解,不管将第一像素驱动电路和第二像素驱动电路设置在哪个位置,各行中两个相邻的同一颜色的亚像素单元的工作电压之和都是相等的,本发明的实施方式并不应理解为对本发明保护范围的限定。
在本发明至少一实施例中,如图2所示,每一种基色的各个奇数像素列接入到第一组像素驱动电路110,各个偶数像素列接入到第二组像素驱动电路120。
通过这种方式,能够实现工艺的同一,降低显示面板的制作难度。当然实际应用中,各个基色的奇数(偶数)列所接入的像素驱动电路也可以不相同。比如,红色像素的奇数列可以接入第一像素驱动电路,偶数列接入第二像素驱动电路;同时将蓝色和绿色像素的奇数列都接入第二像素驱动电路,偶数列可以接入第一像素驱动电路,只要同一基色的相邻两个像素列的工作电压线分别从第一行像素的一侧和最后一行像素的一侧接入不同的像素驱动电路,都可以实现本发明实施例的技术方案。
在本发明至少一实施例中,如图2所示,显示面板包括3种基色,每一组像素驱动电路包括3个子驱动电路,即红色驱动电路、绿色驱动电路和蓝色驱动电路;第一组像素驱动电路中的每一个子驱动电路的工作电压线与一种基色的各个奇数像素列相连,第二组像素驱动电路中的每一个子驱动电路的工作电压线与一种基色的各个偶数像素列相连。
当然实际应用中,N也可以取其他大于3的值,本发明至少一实施例提供的技术方案对于四基色或者其他多基色显示面板同样适用。
在本发明至少一实施例中,所述显示面板为有源矩阵有机发光二极体面板有源矩阵有机发光二极体或主动矩阵有机发光二极体(Active-matrix organic light-emitting diode,AMOLED)面板。
本发明至少一实施例还提供了一种驱动显示面板的方法,该显示面板中设置有两组像素驱动电路,该方法包括:
步骤S1,对于所述显示面板的每一种基色的每两个相邻像素列,将其中一个像素列的工作电压接入到第一组像素驱动电路,接入点位于像素阵列的第一行像素所在的一侧;将另一个像素列的工作电压接入第二组像素驱动电路,接入点位于像素阵列的最后一行像素所在的一侧;
步骤S2,使两组像素驱动电路向接入的工作电压相同。
本发明至少一实施例中,例如,针对显示面板的每一种基色,将其各个奇数像素列的工作电压接入第一组像素驱动电路,将其各个偶数像素列的工作电压接入第二组像素驱动电路;或者,将其各个奇数像素列的工作电压接入第二组像素驱动电路,将其各个偶数像素列的工作电压接入第一组像素驱动电路。
本发明至少一实施例还提供了一种显示装置,包括上述任一项所述的显示面板。
例如,本发明实施例的显示装置可以为:电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、手表等任何具有显示功能的产品或部件。
以上所述仅是本发明的示范性实施方式,而非用于限制本发明的保护范围,本发明的保护范围由所附的权利要求确定。
本申请要求于2014年6月24日递交的中国专利申请第201410290786.5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。

Claims (9)

  1. 一种显示面板,包括第一组像素驱动电路和第二组像素驱动电路;且每一种基色的每两个相邻像素列中,一个像素列的工作电压线接入所述第一组像素驱动电路,接入点位于像素阵列的第一行像素所在的一侧;另一个像素列的工作电压线接入所述第二组像素驱动电路,接入点位于像素阵列的最后一行像素所在的一侧。
  2. 如权利要求1所述的显示面板,其中,所述第一组像素驱动电路设置在所述显示面板中第一行像素所在的一侧;所述第二组像素驱动电路设置在所述显示面板中最后一行像素所在的一侧。
  3. 如权利要求1所述的显示面板,其中,每一种基色的各个奇数像素列的工作电压线接入到所述第一组像素驱动电路,各个偶数像素列的工作电压线接入到所述第二组像素驱动电路;或者,
    每一种基色的各个偶数像素列的工作电压线接入到所述第一组像素驱动电路,各个奇数像素列的工作电压线接入到所述第二组像素驱动电路。
  4. 如权利要求1或3所述的显示面板,其中,所述显示面板包括N种基色,每一组像素驱动电路包括N个子驱动电路;第一组像素驱动电路中的每一个子驱动电路与一种基色的各个奇数像素列的工作电压线相连,第二组像素驱动电路中的每一个子驱动电路与一种基色的各个偶数像素列的工作电压线相连;其中,N≥3。
  5. 如权利要求4所述的显示面板,其中,所述N的取值为3,3种基色分别为红色、绿色、蓝色。
  6. 如权利要求1-5任一项所述的显示面板,其中,所述显示面板为有源矩阵有机发光二极体面板。
  7. 一种显示面板的驱动方法,所述显示面板中设置有两组像素驱动电路,所述方法包括:
    对于所述显示面板的每一种基色的每两个相邻像素列,将其中一个像素列的工作电压接入到第一组像素驱动电路,接入点位于像素阵列的第一行像素所在的一侧;将另一个像素列的工作电压接入第二组像素驱动电路,接入点位于像素阵列的最后一行像素所在的一侧;
    使两组像素驱动电路向接入的工作电压相同。
  8. 如权利要求7所述的方法,其中针对显示面板的每一种基色,
    将其各个奇数像素列的工作电压接入第一组像素驱动电路,将其各个偶数像素列的工作电压接入第二组像素驱动电路;或者,
    将其各个奇数像素列的工作电压接入第二组像素驱动电路,将其各个偶数像素列的工作电压接入第一组像素驱动电路。
  9. 一种显示装置,包括权利要求1-6任一项所述的显示面板。
PCT/CN2014/087899 2014-06-24 2014-09-30 显示面板及其驱动方法和显示装置 WO2015196610A1 (zh)

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