WO2016110021A1 - 像素结构、显示面板和显示装置 - Google Patents

像素结构、显示面板和显示装置 Download PDF

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Publication number
WO2016110021A1
WO2016110021A1 PCT/CN2015/076847 CN2015076847W WO2016110021A1 WO 2016110021 A1 WO2016110021 A1 WO 2016110021A1 CN 2015076847 W CN2015076847 W CN 2015076847W WO 2016110021 A1 WO2016110021 A1 WO 2016110021A1
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Prior art keywords
pixel circuit
light emitting
pixel
emitting diodes
organic light
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PCT/CN2015/076847
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English (en)
French (fr)
Inventor
段立业
王俪蓉
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京东方科技集团股份有限公司
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Priority to EP15797576.4A priority Critical patent/EP3244390A4/en
Priority to US14/894,707 priority patent/US9842542B2/en
Publication of WO2016110021A1 publication Critical patent/WO2016110021A1/zh

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    • 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]
    • G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
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    • 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]
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    • 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]
    • G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
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    • 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
    • G09G2300/0804—Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing 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
    • 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0814—Several active elements per pixel in active matrix panels used for selection purposes, e.g. logical AND for partial update
    • 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes

Definitions

  • the present disclosure relates to a pixel structure, a display panel, and a display device.
  • OLED Organic Light-Emitting
  • AMOLED Active Matrix Organic Light Emitting Diode
  • the area occupied by the pixel circuit on the backplane is increased, and each sub-pixel on the AMOLED panel uses a different pixel circuit, and therefore, the same size
  • the display panel when using the same backplane process, the more complicated the structure of the pixel circuit, the lower the pixel density on the display panel. That is to say, since the structure of the pixel circuit with the compensation function is relatively complicated, and each sub-pixel on the AMOLED panel uses different pixel circuits, to improve the pixel density on the display panel, it is necessary to improve the back-plate process capability, so that the same More pixel circuits with compensation can be fabricated on the backplane of the area.
  • a pixel structure, a display panel, and a display device are provided to solve the problem that when a pixel circuit structure is relatively complicated, since each sub-pixel on the AMOLED panel uses different pixel circuits, if it is to be improved The pixel density on the display panel increases the complexity of the backplane process.
  • a pixel structure provided by an embodiment of the present disclosure includes a pixel circuit, a switch circuit, and a sharing device The n organic light emitting diodes of the pixel circuit, where n is greater than or equal to 2.
  • Each of the organic light emitting diodes sharing the pixel circuit is located in the same column in the display panel, and each of the organic light emitting diodes sharing the pixel circuit emits light of the same color when emitting light.
  • the switching circuit is configured to control any two organic light emitting diodes sharing the pixel circuit to emit light at different time periods.
  • the pixel circuit is configured to drive respective organic light emitting diodes sharing the pixel circuit to emit light according to the received data signal.
  • a display panel provided by an embodiment of the present disclosure includes at least one pixel structure provided by an embodiment of the present disclosure.
  • a display device provided by an embodiment of the present disclosure includes a display panel provided by an embodiment of the present disclosure.
  • the switch circuit can control any two of the common pixel circuits.
  • the organic light emitting diodes emit light at different time periods. Therefore, when the pixel density on the display panel is increased, since a plurality of OLEDs can share one pixel circuit, the number of pixel circuits in the display panel is not increased or even increased, which can reduce the complexity of the backplane process. degree.
  • 1a is a schematic diagram of a pixel structure according to an embodiment of the present disclosure
  • FIG. 1b is a schematic diagram of another pixel structure according to an embodiment of the present disclosure.
  • FIG. 2a is a schematic diagram of still another pixel structure according to an embodiment of the present disclosure.
  • FIG. 2b is a schematic diagram of still another pixel structure according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram showing a positional relationship between two OLEDs sharing a pixel circuit in a display panel according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
  • FIG. 5 is a timing diagram of operations of two OLEDs sharing one pixel circuit in a display panel according to an embodiment of the present disclosure.
  • the pixel structure, the display panel, and the display device provided by the embodiments of the present disclosure since a plurality of OLEDs can share one pixel circuit, when the pixel density on the display panel is increased, the display panel The number of pixel circuits in the increase is not much or even increased, which can reduce the complexity of the backplane process.
  • FIG. 1a and 1b respectively show schematic diagrams of an exemplary pixel structure provided by an embodiment of the present disclosure.
  • a pixel structure provided by an embodiment of the present disclosure may include: a pixel circuit 11, a switch circuit 12, and n organic light emitting diodes 13 sharing the pixel circuit, n being greater than or equal to two.
  • the respective organic light emitting diodes 13 of the shared pixel circuit 11 are located in the same column in the display panel, and the respective organic light emitting diodes 13 sharing the pixel circuit 11 emit light of the same color when emitting light.
  • the switch circuit 12 is for controlling any two organic light emitting diodes 13 of the shared pixel circuit 11 to emit light at different time periods.
  • the pixel circuit 11 is configured to drive the respective organic light emitting diodes 13 sharing the pixel circuit to emit light according to the received data signal Data.
  • FIG. 1a and FIG. 1b an example is described in which three organic light emitting diodes share one pixel circuit.
  • the pixel circuit in FIG. 1a or FIG. 1b may be a pixel circuit of any structure.
  • the pixel circuit in FIG. 1a may include a transistor for controlling light emission, or may not include a transistor for controlling light emission.
  • the pixel circuit in Fig. 1b includes a transistor for controlling light emission, and a transistor for controlling light emission is not shown in Fig. 1b.
  • the switching circuit can include n transistors.
  • FIG. 2a shows a schematic diagram of still another exemplary pixel structure provided by an embodiment of the present disclosure.
  • the respective organic light emitting diodes 13 of the shared pixel circuit 11 are connected to the pixel circuits 11 through a different transistor 121 of the switching circuit 12, respectively. That is to say, the respective organic light emitting diodes 13 of the shared pixel circuit 11 are respectively connected to the pixel circuit 11 through one transistor 121 of the switching circuit 12, and the different organic light emitting diodes 13 are connected to the pixel circuit 11 through different transistors 121.
  • the gates of the three transistors 121 in Figure 2a receive different illumination signals EM1, EM2 and EM3, respectively.
  • the pixel circuit 11 may include a transistor 111 for controlling light emission, and the switch circuit 12 includes n-1 transistors.
  • FIG. 2b shows a schematic diagram of still another exemplary pixel structure provided by an embodiment of the present disclosure.
  • one of the n organic light emitting diodes 13 sharing the pixel circuit 11 is connected to one of the transistors 111 in the pixel circuit 11 for controlling light emission except for the gate (when the electrode is the source)
  • the other electrode is the drain, and when the electrode is the drain, the other electrode is the source
  • the transistor 111 for controlling the light emission controls the organic light-emitting diode 13 connected thereto to emit light.
  • Each of the n organic light emitting diodes 13 of the shared pixel circuit 11 except the organic light emitting diode 13 directly connected to the pixel circuit 11 is connected to the pixel circuit 11 through a different transistor 121 of the switching circuit 12, respectively.
  • the other electrode other than the gate in the transistor that controls the light emission.
  • each of the n organic light emitting diodes 13 of the common pixel circuit 11 except the organic light emitting diode 13 directly connected to the pixel circuit 11 is connected to the pixel circuit 11 through one transistor 121 of the switching circuit 12, respectively.
  • Different organic light emitting diodes 13 are connected to the pixel circuit 11 through different transistors 121.
  • the gate of the transistor for controlling the illumination in the pixel circuit 11 in FIG. 2b receives the illumination signal EM1, and the gates of the two transistors 121 receive the different illumination signals EM2 and EM3, respectively.
  • the pixel circuit in the pixel structure provided by the embodiment of the present disclosure is a pixel circuit having a function of threshold voltage compensation.
  • two organic light emitting diodes share a pixel circuit in a pixel structure.
  • two light emitting diodes sharing a pixel circuit in a pixel structure provided by an embodiment of the present disclosure are adjacent.
  • FIG. 3 is a schematic diagram showing the positional relationship of two OLEDs sharing one pixel circuit in a display panel in a pixel structure according to an embodiment of the present disclosure.
  • two light emitting diodes sharing a pixel circuit in a pixel structure provided by an embodiment of the present disclosure are located in the same vapor deposition area A.
  • one vapor deposition region A is a region on the substrate 32 covered by a hole H on the mask 31 when the light-emitting layer 33 in the organic light-emitting diode is vapor-deposited.
  • the anodes of the two organic light emitting diodes in the same vapor deposition zone A are respectively connected to the same pixel circuit through a switching circuit.
  • the anode of one of the organic light emitting diodes in the same vapor deposition zone A is connected to a pixel circuit, and the anode of the other organic light emitting diode in the vapor deposition zone A is connected to the pixel circuit through a switching circuit.
  • the pixel circuit includes a transistor for controlling light emission.
  • a display panel provided by an embodiment of the present disclosure includes at least one pixel structure provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure.
  • the display panel 41 provided by the embodiment of the present disclosure includes a plurality of pixel structures provided by the embodiments of the present disclosure, and each of the two organic light emitting diodes in the display panel 41 shares one pixel circuit.
  • OLED (1, 1) and OLED (1, 2) share a pixel circuit
  • OLED (1, N) and OLED (2, N) share a pixel circuit
  • OLED (2n+1, N) and OLED (2n, N) share a pixel circuit.
  • the gates of the transistors in the switching circuit to which the organic light emitting diodes of the same row are connected receive the same light-emitting signal.
  • the gate of the transistor in the switching circuit to which the OLED (1, 1) is connected and the gate of the transistor in the switching circuit to which the OLED (1, N) is connected receive the light-emission signal EM1, 1.
  • the gate of the transistor in the switching circuit to which the OLED (2, 1) is connected and the gate of the transistor in the switching circuit to which the OLED (2, N) is connected receive the light-emission signals EM1, 2.
  • the gate of the transistor in the switching circuit connected to the OLED (2n-1, 1) and the gate of the transistor in the switching circuit connected to the OLED (2n-1, N) receive the illuminating signal EMn,1.
  • the gate of the transistor in the switching circuit to which the OLED (2n, 1) is connected and the gate of the transistor in the switching circuit to which the OLED (2n, N) is connected receive the light-emission signal EMn, 2.
  • the individual pixel circuits in Figure 4 also receive different data signals, such as Vdata_1, ... Vdata_N, respectively.
  • the individual pixel circuits in Figure 4 also receive different scan signals, such as Gata_1, ... Gate_n, respectively.
  • the pixel circuit in FIG. 4 is a 2T1C structure.
  • the pixel circuit can also adopt other structures.
  • FIG. 5 is a timing chart showing the operation of two organic light emitting diodes sharing one pixel circuit in the display panel 41 shown in FIG. 4 when displaying adjacent two frames of images.
  • the switching circuit controls the organic light emitting diodes located in the previous row among the two light emitting diodes sharing the pixel circuit connected thereto. That is, when the previous frame image Frame1 of the adjacent two frames of images is displayed, the transistor in the switching circuit connected to the OLED (1, 1) is turned on, and the switching circuit connected to the OLED (1, N) The transistor is turned on, the transistor in the switching circuit connected to the OLED (2n-1, 1) is turned on, and the transistor in the switching circuit connected to the OLED (2n-1, N) is turned on.
  • the switching circuit controls the organic light emitting diodes located in the next row among the two light emitting diodes sharing the pixel circuit connected thereto. That is, when displaying the next frame image Frame2 of the adjacent two frames of images, the transistor in the switching circuit connected to the OLED (2, 1) is turned on, and the switching circuit connected to the OLED (2, N) The transistor is turned on, the transistor in the switching circuit connected to the OLED (2n, 1) is turned on, and the transistor in the switching circuit connected to the OLED (2n, N) is turned on.
  • the timing chart shown in FIG. 5 is an operation timing chart of the OLED (1, N) and the OLED (2, N) in the display panel when displaying images of two adjacent frames.
  • the pixel density is constant when the display panel has the same pixel density.
  • the number of circuits can be greatly reduced, and as the number of pixel circuits is reduced, the number of GOA units is also reduced, which is advantageous for the frame of the display device to be made narrower.
  • a display device provided by an embodiment of the present disclosure includes a display panel provided by an embodiment of the present disclosure.
  • modules in the apparatus of the above embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module according to the needs of the implementation process, or may be further split into multiple sub-modules.

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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 El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种像素结构、显示面板和显示装置。该像素结构包括像素电路（11）、开关电路（12）和共用所述像素电路（11）的n个有机发光二极管（13），n大于等于2。共用所述像素电路（11）的各个有机发光二极管（13）位于显示面板中的同一列，共用所述像素电路（11）的各个有机发光二极管（13）在发光时发出相同颜色的光。所述开关电路（12）用于控制共用所述像素电路（11）的任意两个有机发光二极管（13）在不同时间段发光。所述像素电路（11）用于根据接收到的数据信号驱动共用所述像素电路（11）的各个有机发光二极管（13）发光。该像素结构用以解决背板工艺复杂的问题。

Description

像素结构、显示面板和显示装置 技术领域
本公开涉及一种像素结构、显示面板和显示装置。
背景技术
有机发光二极管(OLED，Organic Light-Emitting)以其节能、显示效果好等特点影响着电子消费市场。现在OLED显示屏已经被广泛应用到各种电子消费品上。
在有源矩阵有机发光二极管(AMOLED，Active Matrix Organic Light Emitting Diode)面板设计中，要解决的问题是像素和像素之间的亮度非均匀性的问题。具有补偿阈值电压的非均匀性、漂移和OLED非均匀性的像素电路有很多种，但具有补偿功能的像素电路结构都比较复杂，这会使其在背板上占用的面积增加，从而使得在一定工艺能力下像素密度的提高成为瓶颈。
目前，由于具有补偿功能的像素电路的结构比较复杂，这导致这种像素电路在背板上所占用的面积增加，而AMOLED面板上的每个子像素要使用不同的像素电路，因此，同样尺寸的显示面板，在采用相同的背板工艺时，像素电路的结构越复杂，显示面板上的像素密度就越低。也就是说，由于具有补偿功能的像素电路的结构比较复杂，并且AMOLED面板上的每个子像素要使用不同的像素电路，要提高显示面板上的像素密度，就要提高背板工艺能力，使得相同面积的背板上可以制作更多具有补偿功能的像素电路。
综上所述，由于目前具有补偿功能的像素电路的结构比较复杂，而AMOLED面板上的每个子像素要使用不同的像素电路，如果要提高显示面板上的像素密度，则背板工艺的复杂度会增加。
发明内容
在本公开的一些实施例中提供了一种像素结构、显示面板和显示装置，用以解决在像素电路结构比较复杂时，由于AMOLED面板上的每个子像素要使用不同的像素电路，如果要提高显示面板上的像素密度，则背板工艺的复杂度会增加的问题。
本公开实施例提供的一种像素结构，包括像素电路、开关电路和共用所 述像素电路的n个有机发光二极管，这里，n大于等于2。
共用所述像素电路的各个有机发光二极管位于显示面板中的同一列，共用所述像素电路的各个有机发光二极管在发光时发出相同颜色的光。
开关电路用于控制共用所述像素电路的任意两个有机发光二极管在不同时间段发光。
所述像素电路用于根据接收到的数据信号驱动共用所述像素电路的各个有机发光二极管发光。
本公开实施例提供的一种显示面板，包括至少一个本公开实施例提供的像素结构。
本公开实施例提供的显示装置，包括本公开实施例提供的显示面板。
本公开实施例提供的像素结构、显示面板和显示装置，由于位于显示面板中的同一列的多个同色的有机发光二极管通过开关电路共用一个像素电路，开关电路可以控制共用一个像素电路的任意两个有机发光二极管在不同时间段发光。因此，在显示面板上的像素密度提高时，由于多个OLED可以共用一个像素电路，因此，显示面板中的像素电路的数量增加的不多，甚至不会增加，这可以降低背板工艺的复杂度。
附图说明
图1a为本公开实施例提供的一种像素结构的示意图；
图1b为本公开实施例提供的另一种像素结构的示意图；
图2a为本公开实施例提供的又一种像素结构的示意图；
图2b为本公开实施例提供的又另一种像素结构的示意图；
图3为本公开实施例提供的像素结构中共用一个像素电路的两个OLED在显示面板中的位置关系示意图；
图4为本公开实施例提供的显示面板的结构示意图；
图5为本公开实施例提供的显示面板中共用一个像素电路的两个OLED的工作时序图。
具体实施方式
本公开实施例提供的像素结构、显示面板和显示装置，由于多个OLED可以共用一个像素电路，因此，在显示面板上的像素密度提高时，显示面板 中的像素电路的数量增加的不多，甚至不会增加，这可以降低背板工艺的复杂度。
下面结合说明书附图，对本公开实施例提供的一种像素结构、显示面板和显示装置的具体实施方式进行说明。
图1a和图1b分别示出了本公开实施例提供的一种示例性像素结构的示意图。
如图1a或图1b所示，本公开实施例提供的一种像素结构可以包括：像素电路11、开关电路12和共用所述像素电路的n个有机发光二极管13，n大于等于2。
共用像素电路11的各个有机发光二极管13位于显示面板中的同一列，共用像素电路11的各个有机发光二极管13在发光时发出相同颜色的光。
开关电路12用于控制共用像素电路11的任意两个有机发光二极管13在不同时间段发光。
像素电路11，用于根据接收到的数据信号Data驱动共用所述像素电路的各个有机发光二极管13发光。
在图1a和图1b中均以三个有机发光二极管共用一个像素电路为例进行说明。图1a或图1b中的像素电路可以为任意结构的像素电路。其中，图1a中的像素电路可以包括用于控制发光的晶体管，也可以不包括用于控制发光的晶体管。图1b中的像素电路中包括用于控制发光的晶体管，在图1b中未示出用于控制发光的晶体管。
进一步地，开关电路可包括n个晶体管。
图2a示出了本公开实施例提供的又一种示例性像素结构的示意图。
如图2a所示，共用像素电路11的各个有机发光二极管13分别通过开关电路12中的一个不同的晶体管121连接像素电路11。也就是说，共用像素电路11的各个有机发光二极管13分别通过开关电路12中的一个晶体管121连接像素电路11，不同有机发光二极管13通过不同的晶体管121连接像素电路11。图2a中的三个晶体管121的栅极分别接收不同的发光信号EM1、EM2和EM3。
进一步地，像素电路11可包括用于控制发光的晶体管111，开关电路12包括n-1个晶体管。
图2b示出了本公开实施例提供的又另一种示例性像素结构的示意图。
如图2b所示，共用像素电路11的n个有机发光二极管13中的一个有机发光二极管13连接像素电路11中用于控制发光的晶体管111中除栅极以外的一个电极(当该电极为源极时，另一个电极为漏极，当该电极为漏极时，另一个电极为源极)，用于控制发光的晶体管111控制与其相连的有机发光二极管13发光。共用像素电路11的n个有机发光二极管13中除与像素电路11直接相连的有机发光二极管13以外的各个有机发光二极管13，分别通过开关电路12中的一个不同的晶体管121连接像素电路11中用于控制发光的晶体管中除栅极以外的另一个电极。也就是说，共用像素电路11的n个有机发光二极管13中除与像素电路11直接相连的有机发光二极管13以外的各个有机发光二极管13，分别通过开关电路12中的一个晶体管121连接像素电路11中用于控制发光的晶体管中除栅极以外的另一个电极。不同的有机发光二极管13通过不同的晶体管121连接像素电路11。图2b中的像素电路11中的用于控制发光的晶体管的栅极接收发光信号EM1，两个晶体管121的栅极分别接收不同的发光信号EM2和EM3。
可选地，本公开实施例提供的像素结构中的像素电路是具有阈值电压补偿的功能的像素电路。
示例性地，在本公开实施例提供的像素结构中，两个有机发光二极管共用像素结构中的像素电路。
示例性地，共用本公开实施例提供的像素结构中的像素电路的两个发光二极管相邻。
图3为本公开实施例提供的像素结构中共用一个像素电路的两个OLED在显示面板中的位置关系示意图。
示例性地，如图3所示，本公开实施例提供的像素结构中共用像素电路的两个发光二极管位于同一个蒸镀区域A。
其中，一个蒸镀区域A是在蒸镀有机发光二极管中的发光层33时，基板32上被掩膜板31上的一个孔H所覆盖的区域。
同一个蒸镀区域A中的两个有机发光二极管的阳极分别通过开关电路连接同一个像素电路。或者，同一个蒸镀区域A中的一个有机发光二极管的阳极连接一个像素电路，该蒸镀区域A中的另一个有机发光二极管的阳极通过开关电路连接该像素电路。此时，该像素电路中包含用于控制发光的晶体管。
在同一个蒸镀区域中，制作两个OLED，在显示面板上的像素密度不变 的情况下，这可以降低掩膜版设计时的复杂度。
本公开实施例提供的显示面板包括至少一个本公开实施例提供的像素结构。
图4示出了本公开实施例提供的显示面板的结构示意图。
示例性地，如图4所示，本公开实施例提供的显示面板41包括多个本公开实施例提供的像素结构，显示面板41中的每两个有机发光二极管共用一个像素电路。
例如，OLED(1，1)和OLED(1，2)共用一个像素电路，OLED(1，N)和OLED(2，N)共用一个像素电路，OLED(2n+1，1)和OLED(2n，1)共用一个像素电路，OLED(2n+1，N)和OLED(2n，N)共用一个像素电路。并且，在图4中，同一行的有机发光二极管所连接的开关电路中的晶体管的栅极接收相同的发光信号。例如，OLED(1，1)连接的开关电路中的晶体管的栅极和OLED(1，N)连接的开关电路中的晶体管的栅极均接收发光信号EM1，1。OLED(2，1)连接的开关电路中的晶体管的栅极和OLED(2，N)连接的开关电路中的晶体管的栅极均接收发光信号EM1，2。OLED(2n-1，1)连接的开关电路中的晶体管的栅极和OLED(2n-1，N)连接的开关电路中的晶体管的栅极均接收发光信号EMn，1。OLED(2n，1)连接的开关电路中的晶体管的栅极和OLED(2n，N)连接的开关电路中的晶体管的栅极均接收发光信号EMn，2。图4中的各个像素电路还分别接收不同的数据信号，如Vdata_1,…Vdata_N。图4中的各个像素电路还分别接收不同的扫描信号，如Gata_1,…Gate_n。
图4中的像素电路为2T1C的结构，当然，像素电路也可以采用其他结构。
图5示出了图4所示的显示面板41中共用一个像素电路的两个有机发光二极管在显示相邻两帧图像时的工作时序图。
如图5所示，在显示相邻两帧图像中的前一帧图像Frame1时，开关电路控制共用与其相连的像素电路的两个发光二极管中位于前一行的有机发光二极管发光。也就是说，在显示相邻两帧图像中的前一帧图像Frame1时，与OLED(1,1)相连的开关电路中的晶体管导通，与OLED(1,N)相连的开关电路中的晶体管导通，与OLED(2n-1,1)相连的开关电路中的晶体管导通，与OLED(2n-1,N)相连的开关电路中的晶体管导通。在所述显示面板显示相邻两 帧图像中的后一帧图像Frame2时，开关电路控制共用与其相连的像素电路的两个发光二极管中位于后一行的有机发光二极管发光。也就是说，在显示相邻两帧图像中的后一帧图像Frame2时，与OLED(2,1)相连的开关电路中的晶体管导通，与OLED(2,N)相连的开关电路中的晶体管导通，与OLED(2n,1)相连的开关电路中的晶体管导通，与OLED(2n,N)相连的开关电路中的晶体管导通。
图5所示的时序图为显示面板中的OLED(1，N)和OLED(2，N)在显示相邻两帧图像时的工作时序图。
由于显示面板中的同一列的每两个相邻的同色(即在发光时发相同颜色的光)的OLED都共用一个像素电路，因此，在显示面板上的像素密度不变的情况下，像素电路的数量可以大大减少，而随着像素电路的数量的减小，GOA单元的数量也会减少，这有利于显示装置的边框做的更窄。
本公开实施例提供的显示装置，包括本公开实施例提供的显示面板。
本领域技术人员可以理解，上述实施例的装置中的模块可以按照本实施例的描述分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。根据实施过程中的需要，上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。
以上所述，仅为本公开的示例性实施例，并非用于限定本公开的保护范围。本领域的技术人员可以对本公开的实施例进行各种改动和变型而不脱离本公开的实质和范围。本公开的保护范围以所附权利要求的保护范围为准。
本申请要求于2015年1月5日递交的中国专利申请第201510002771.9号的优先权，在此全文引用该中国专利申请公开的内容作为本申请的一部分。

Claims (10)

  1. 一种像素结构，包括：像素电路、开关电路和共用所述像素电路的n个有机发光二极管，这里，n大于等于2，
    其中，共用所述像素电路的各个有机发光二极管位于显示面板中的同一列，共用所述像素电路的各个有机发光二极管在发光时发出相同颜色的光；
    开关电路用于控制共用所述像素电路的任意两个有机发光二极管在不同时间段发光；
    所述像素电路用于根据接收到的数据信号驱动共用所述像素电路的各个有机发光二极管发光。
  2. 如权利要求1所述的像素结构，其中，所述开关电路包括n个晶体管；
    共用所述像素电路的各个有机发光二极管分别通过所述开关电路中的一个不同的晶体管连接所述像素电路。
  3. 如权利要求1所述的像素结构，其中，所述像素电路中包括用于控制发光的晶体管，所述开关电路包括n-1个晶体管；
    共用所述像素电路的n个有机发光二极管中的一个有机发光二极管连接所述像素电路中用于控制发光的晶体管中除栅极以外的一个电极，所述用于控制发光的晶体管控制与其相连的有机发光二极管发光；
    共用所述像素电路的n个有机发光二极管中除与所述像素电路直接相连的有机发光二极管以外的各个有机发光二极管，分别通过所述开关电路中的一个不同的晶体管连接所述像素电路中用于控制发光的晶体管中除栅极以外的另一个电极。
  4. 如权利要求1所述的像素结构，其中，所述像素电路是具有阈值补偿的功能的像素电路。
  5. 如权利要求1～4任一所述的像素结构，其中，两个有机发光二极管共用所述像素电路。
  6. 如权利要求5所述的像素结构，其中，共用所述像素电路的两个发光二极管相邻。
  7. 如权利要求6所述的像素结构，其中，共用所述像素电路的两个发光二极管位于同一个蒸镀区域；
    其中，一个蒸镀区域是在蒸镀有机发光二极管中的发光层时，基板上被掩膜板上的一个孔所覆盖的区域。
  8. 一种显示面板，包括至少一个如权利要求1～7任一所述的像素结构。
  9. 如权利要求8所述的显示面板，其中，所述显示面板包括多个像素结构，显示面板中的每两个有机发光二极管共用一个像素电路；
    在所述显示面板显示相邻两帧图像中的前一帧图像时，开关电路控制共用与其相连的像素电路的两个发光二极管中位于前一行的有机发光二极管发光；
    在所述显示面板显示相邻两帧图像中的后一帧图像时，开关电路控制共用与其相连的像素电路的两个发光二极管中位于后一行的有机发光二极管发光。
  10. 一种显示装置，包括如权利要求8或9所述的显示面板。
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