WO2020098069A1 - Oled显示面板 - Google Patents

Oled显示面板 Download PDF

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Publication number
WO2020098069A1
WO2020098069A1 PCT/CN2018/122417 CN2018122417W WO2020098069A1 WO 2020098069 A1 WO2020098069 A1 WO 2020098069A1 CN 2018122417 W CN2018122417 W CN 2018122417W WO 2020098069 A1 WO2020098069 A1 WO 2020098069A1
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WO
WIPO (PCT)
Prior art keywords
signal line
display panel
oled display
pixel column
thin film
Prior art date
Application number
PCT/CN2018/122417
Other languages
English (en)
French (fr)
Inventor
李超
易士娟
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/476,288 priority Critical patent/US10748983B2/en
Publication of WO2020098069A1 publication Critical patent/WO2020098069A1/zh

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Classifications

    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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]
    • 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
    • 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]
    • 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]
    • G09G3/3266—Details of drivers for scan electrodes
    • 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]
    • 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]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • 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

Definitions

  • This application relates to the field of display technology, in particular to an OLED display panel.
  • AMOLED Active-matrix organic light emitting Diode
  • AMOLED panels have the advantages of wide viewing angle, high color saturation, low driving voltage and low power consumption, plus fast response, light weight, thin thickness, simple structure and low cost, and are regarded as one of the most promising products.
  • the unit test circuit uses multiple TFTs and multiple signal lines, which occupies a relatively large space and affects the screen ratio.
  • the unit test circuit uses multiple TFTs and multiple signal lines, and the circuit design is complicated, resulting in a relatively large space occupation ratio, which further reduces the AMOLED screen ratio.
  • the unit test circuit uses multiple TFTs and multiple signal lines, and the circuit design is complicated, resulting in a relatively large space occupation ratio, which further reduces the AMOLED screen ratio.
  • the present application provides an OLED display panel, which can reduce the unit test input signal line in the pixel driving circuit to solve the existing OLED display panel, because the unit test circuit uses multiple TFTs and multiple signal lines, which in turn affects the OLED display panel The technical problems of the screen ratio.
  • the present application provides an OLED display panel, which includes at least: data signal lines, scanning signal lines, pixel arrays, input unit circuits, control unit circuits, and output unit circuits;
  • the pixel array includes a first pixel column, a second pixel column, a third pixel column, and a fourth pixel column distributed in a matrix along the first direction.
  • the input unit circuit includes a first input signal line, a second input signal line, and a third input signal line;
  • the control unit circuit includes a first thin film transistor, a second thin film transistor, a third thin film transistor, and a first control signal line, the first control signal line is connected to the first control terminal of the first thin film transistor, the first The second control terminal of the second thin film transistor and the third control terminal of the third thin film transistor, the first input signal line, the second input signal line and the third input signal line are respectively connected to the first A first input terminal of the thin film transistor, a second input terminal of the second thin film transistor, and a third input terminal of the third thin film transistor;
  • the output unit circuit includes a first output signal line, a second output signal line, and a third output signal line.
  • the first output signal line, the second output signal line, and the third output signal line are respectively connected to A first output terminal of the first thin film transistor, a second output terminal of the second thin film transistor, and a third output terminal of the third thin film transistor;
  • the first output signal line is connected to the first pixel column
  • the second output signal line is connected to the third pixel column
  • the third output signal line is connected to the second pixel column and the first Four pixel columns are connected.
  • the first pixel column and the third pixel column each include a red subpixel and a blue subpixel, and the red subpixel and the blue subpixel alternate arrangement;
  • the red sub-pixels in the first pixel column are alternately arranged with the red sub-pixels in the third pixel column, the blue sub-pixels in the first pixel column and the blue sub-pixels in the third pixel column Staggered pixels;
  • the first output signal line is used to input a first clock signal to the first pixel column when the OLED display panel displays a red picture;
  • the second output signal line is used to input a second clock signal to the third pixel column when the OLED display panel displays a red picture.
  • the high level of the first clock signal and the high level of the second clock signal alternate.
  • the high level of the first clock signal is greater than the power supply voltage of the OLED display panel
  • the high level of the second clock signal is greater than the power supply voltage of the OLED display panel.
  • the third thin film transistor is used for turning off the third control terminal of the third thin film transistor when the OLED display panel displays a red picture.
  • the first output signal line is used to input a third clock signal to the first pixel column when the OLED display panel displays a blue picture;
  • the second output signal line is used to input a fourth clock signal to the third pixel column when the OLED display panel displays a blue picture.
  • the high level of the third clock signal and the high level of the fourth clock signal alternate.
  • the high level of the third clock signal is greater than the power supply voltage of the OLED display panel
  • the high level of the fourth clock signal is greater than the power supply voltage of the OLED display panel.
  • the third thin film transistor is used for turning on the third control terminal of the third thin film transistor when the OLED display panel displays a green picture.
  • the OLED display panel provided by the present application reduces a set of six unit test signal lines to four, thereby enabling the image detection of the red, green and blue sub-pixels of the OLED display panel , And further increased the screen ratio of OLED display panels.
  • FIG. 1 is a design method of a unit test circuit of an OLED display panel in the prior art.
  • FIG. 2a is a schematic structural diagram of an OLED display panel provided by this application.
  • FIG. 2b is a design method of a unit test circuit of an OLED display panel provided by this application.
  • 2c is a schematic structural diagram of a pixel array of an OLED display panel provided by this application.
  • FIG. 3 is a clock signal when the unit test circuit of the OLED display panel provided by the present application detects a monochrome red picture.
  • 4 is a clock signal when the unit test circuit of the OLED display panel provided by the present application detects a color picture.
  • This application is directed to the existing OLED display panel. Because its unit test circuit uses multiple TFTs and multiple signal lines, the circuit design is complex, which further affects the technical problem of the screen ratio of the OLED display panel. This embodiment can solve this defect.
  • a unit test circuit design of an existing OLED display panel where, 101 is the unit test signal line in which the first row of light emitting layers in the input display area is green; 102 is the unit test signal line in which the first row of light emitting layers in the input display area is blue or red; 103 is the first in the input display area A row of unit test signal lines with a red or blue light-emitting layer; 104 is a switch control signal line for controlling the thin film transistor T3 and the thin film transistor T6; 105 is a switch control signal line for controlling the thin film transistor T1 and the thin film transistor T5; 106 is a control The switching control signal lines of the thin film transistor T2 and the thin film transistor T4; 107 is a data signal line outputting a red or blue light emitting layer in the first row in the display area; 108 is a data signal outputting a green light emitting layer in the first row in the display area; Line 109 is a data signal line in which the light emitting layer of the first row in the display area
  • Unit test signal line 103 input low-level data signal
  • unit test signal line 101 and unit test signal line 102 input high-level data signal
  • switch control signal line 105 input low power Level signal
  • switch control signal line 104 and switch control signal line 106 input high level signal
  • thin film transistor T1 and thin film transistor T5 are turned on
  • thin film transistor T2 thin film transistor T3, thin film transistor T4 and thin film transistor T6 are turned off
  • the pixel The first row of light-emitting layers in the area emits light from the red OLED light-emitting layer, and the remaining colors of the OLED light-emitting layer do not emit light; because the input of the switch control signal line 105, the switch control signal line 104, and the switch control signal line 106 are alternating high and low signals Clock signal, so when the signal is transferred to the second row, the switch control signal line 106 inputs a low-level signal, and the switch control signal line 105 inputs a high-level signal.
  • the thin film transistor T2 and the thin film transistor T4 are turned on, and the thin film transistor T1
  • the thin film transistor T3, the thin film transistor T5, and the thin film transistor T6 are turned off, the unit test signal line 103 inputs a low-level data signal, and the unit test signal line 101 and the unit test signal line 102 input a high-level data signal.
  • the second row of light-emitting layers emits red OLED light-emitting layers, while the rest of the OLED light-emitting layers do not emit light; because the R / G / B arrangement in the pixel area is arranged in the first row of RGBG periodic arrangement, the second row of BGRG periodic arrangement, the odd-numbered row repeats the first One row is arranged, and the even rows are repeated in the second row, so the existing OLED display panel can realize red light layer by layer.
  • the unit test circuit of the existing OLED display panel is designed with multiple thin film transistors, the circuit design is complicated, and the signal line is up to six, which greatly reduces the screen ratio of the OLED display panel.
  • the OLED display panel provided by the present application includes at least:
  • the pixel 203 is located between the data signal line 201 and the scan signal line 202 in an insulated intersection.
  • a pixel array 2030 including a first pixel column 2031, a second pixel column 2032, a third pixel column 2033, and a fourth pixel column 2034 distributed in a matrix along the first direction D1
  • the combination of the column 2031, the second pixel column 2032, the third pixel column 2033, and the fourth pixel column 2034 is periodically arranged along the first direction D1;
  • the input unit circuit includes a first input signal line 204, a second input signal line 205, and a third input signal line 206, wherein the first input signal line 204 is connected to the first pixel column 2031, and the second The input signal line 205 is connected to the third pixel column 2033, and the third input signal line 206 is connected to the second pixel column 2032 and the fourth pixel column 2034;
  • Control unit circuit including a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, and a first control signal line 207
  • the first control signal line 207 is connected to the first control of the first thin film transistor T1 Terminal, the second control terminal of the second thin film transistor T2, the third control terminal of the third thin film transistor T3, the first input signal line 204, the second input signal line 205 and the third
  • the input signal line 206 is respectively connected to the first input terminal of the first thin film transistor T1 switch, the second input terminal of the second thin film transistor T2, and the third input terminal of the third thin film transistor T3;
  • Output unit circuit including a first output signal line 208, a second output signal line 209, and a third output signal line 210, the first output signal line 208, the second output signal line 209, and the third output signal Lines 210 are respectively connected to the first output terminal of the first thin film transistor T1, the second output terminal of the second thin film transistor T2, and the third output terminal of the third thin film transistor T3;
  • the first output signal line 208 is connected to the first pixel column 2031
  • the second output signal line 209 is connected to the third pixel column 2033
  • the third output signal line 210 is connected to the third The second pixel column 2032 and the fourth pixel column 2034 are connected.
  • the first pixel column 2031 and the third pixel column 2033 each include a red subpixel and a blue subpixel, and the red subpixel and the blue subpixel are arranged alternately; the first pixel column The red sub-pixels in 2031 are interleaved with the red sub-pixels in the third pixel column 2033, and the blue sub-pixels in the first pixel column 2031 are interleaved with the blue sub-pixels in the third pixel column 2033 Arrangement; the second pixel column 2032 and the fourth pixel column 2034 both include only green sub-pixels.
  • the first output signal line 208 is used to input a first clock signal to the first pixel column 2031 when the OLED display panel displays a red picture;
  • the second output signal line 209 is used to When the OLED display panel displays a red picture, a second clock signal is input to the third pixel column 2033; the high level of the first clock signal alternates with the high level of the second clock signal; the The high level is greater than the power supply voltage of the OLED display panel; the high level of the second clock signal is greater than the power supply voltage of the OLED display panel.
  • the third thin film transistor T3 is used for turning off the third control terminal of the third thin film transistor T3 when the OLED display panel displays a red picture.
  • the first output signal line 208 is used to input a third clock signal to the first pixel column 2031 when the OLED display panel displays a blue picture;
  • the second output signal line 209 is used to When the OLED display panel displays a blue picture, a fourth clock signal is input to the third pixel column 2033; the high level of the third clock signal alternates with the high level of the fourth clock signal; the third clock The high level of the signal is greater than the power supply voltage of the OLED display panel; the high level of the fourth clock signal is greater than the power supply voltage of the OLED display panel.
  • the third thin film transistor T3 is used for turning on the third control terminal of the third thin film transistor T3 when the OLED display panel displays a green picture.
  • the first input signal line 204 is input to the pixel circuit in which the first row light emitting layer of the display area of the OLED display panel is red, and the second input signal line 205 is input to the OLED display
  • the first row of the light emitting layer of the display area of the panel is a blue pixel circuit
  • the third input signal line 206 is input to the green pixel circuit of the first row of the light emitting layer of the display area of the OLED display panel; when red light is emitted, the The first input signal line 204 inputs a low-level data signal
  • the second input signal line 205 and the third input signal line 206 input a high-level data signal
  • the high-level signal is greater than the operating voltage of the pixel driving circuit, Therefore, the blue sub-pixel circuit connected to the second input signal line 205 and the green sub-pixel circuit connected to the third input signal line 206 are not turned on, because the first input signal line 204 is input to the display of the OLED display panel
  • the red sub-pixels, green sub-pixels, and blue sub-pixels are arranged in the first row of red sub-pixels, green sub-pixels, blue sub-pixels, and green sub-pixels in the area of the pixel 203, and the second row of blue sub-pixels ,
  • the green sub-pixels, the red sub-pixels, and the green sub-pixels are arranged periodically, the odd-numbered rows repeat the first row arrangement, the even-numbered rows repeat the second row arrangement, and the input signal is an alternating clock signal with high level and low level.
  • the first input signal line 204 is input to the pixel circuit where the second row light emitting layer of the display area of the OLED display panel is blue, and the second input signal line 205 is input to the OLED
  • the second row light emitting layer of the display area of the display panel is a red pixel circuit
  • the third input signal line 206 is input to the green pixel circuit of the second row light emitting layer of the display area of the OLED display panel; the first input signal line 204 A high-level data signal is input, and the high-level data signal is greater than the operating voltage of the pixel driving circuit.
  • the first input signal line 204 is input to the pixels in the second row of the light-emitting layer of the display area of the OLED display panel being blue
  • the circuit is not turned on;
  • the second input signal line 205 inputs a low-level data signal, and at this time, the second input signal line 205 is input to the pixel circuit in which the second row light emitting layer of the display area of the OLED display panel is red is turned on;
  • the third input signal line 206 inputs a high-level data signal, and the high-level data signal is greater than the operating voltage of the pixel driving circuit.
  • the third input signal line 206 inputs the second display area of the OLED display panel
  • the pixel circuit in which the row light-emitting layer is green is not turned on; therefore, the second row light-emitting layer in the pixel area emits light in the red OLED light-emitting layer, and the remaining color OLED light-emitting layers do not emit light.
  • the OLED display panel realizes layer-by-layer red light emission
  • the general OLED display panel unit has almost no display difference when testing the inspection panel.
  • 301 is the data signal with the red light emitting layer of the first row of the display area of the OLED display panel in the unit test input signal line in FIG. 2b;
  • 302 is the display of the OLED display panel in the unit test input signal line in FIG. 2b
  • the light-emitting layer in the first row of the area is a blue data signal;
  • the digital signal 301 and the digital signal 302 are a pair of clock signals in the unit test signal line in FIG.
  • the input high-level data signal needs to be greater than the working voltage of the pixel driving circuit, so as to ensure that the OLED light-emitting layer on the pixel does not emit light when the high-level data signal is input, and a single red picture is realized.
  • 401 is a unit test input signal line to input a data signal whose red light emitting layer of the first row of the display area of the OLED display panel is red;
  • 402 is a unit test input signal line Input the data signal of the blue light-emitting layer of the first row of the display area of the OLED display panel;
  • 403 is the unit test input signal line to input the data signal of the green light-emitting layer of the first row of the display area of the OLED display panel;
  • the OLED display panel provided in this application reduces a set of six unit test signal lines to four, thereby enabling the image detection of the red, green and blue sub-pixels of the OLED display panel, and further increased OLED display panel screen ratio.

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

Abstract

一种OLED显示面板，至少包括：第一像素列、第二像素列、第三像素列以及第四像素列；输出单元电路，包括第一输出信号线、第二输出信号线以及第三输出信号线；其中，所述第一输出信号线与所述第一像素列连接，所述第二输出信号线与所述第三像素列连接，所述第三输出信号线与所述第二像素列和所述第四像素列连接。

Description

OLED显示面板 技术领域
本申请涉及显示技术领域，尤其涉及一种OLED显示面板。
 背景技术
目前有源矩阵有机发光二极管面板（Active-matrix organic light emitting diode，AMOLED）具有自发光的特性，其采用非常薄的有机材料涂层和玻璃盖板，当有电流通过时，这些有机材料就会发光。AMOLED面板具有视角广、色饱和度高、驱动电压低且功耗低，加上反应快、重量轻、厚度薄、构造简单以及成本低等优点，被视为最具前途的产品之一。现有生产工艺制成的AMOLED设计中，单元测试电路采用多个TFT，多条信号线，空间占用比较大，影响屏占比。
综上所述，现有的AMOLED设计，其单元测试电路采用多个TFT，多条信号线，电路设计复杂，导致空间占用比比较大，进一步降低了AMOLED的屏占比。
 技术问题
现有的AMOLED设计，其单元测试电路采用多个TFT，多条信号线，电路设计复杂，导致空间占用比比较大，进一步降低了AMOLED的屏占比。
 技术解决方案
本申请提供一种OLED显示面板，能够缩减像素驱动电路中的单元测试输入信号线，以解决现有的OLED显示面板，由于单元测试电路采用多个TFT，多条信号线，进而影响OLED显示面板的屏占比的技术问题。
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种OLED显示面板，至少包括：数据信号线、扫描信号线、像素阵列、输入单元电路、控制单元电路以及输出单元电路；
其中，所述像素阵列包括沿第一方向呈矩阵状分布的第一像素列、第二像素列、第三像素列以及第四像素列，由所述第一像素列、所述第二像素列、所述第三像素列以及所述第四像素列构成的组合沿着所述第一方向周期排列；
所述输入单元电路包括第一输入信号线、第二输入信号线以及第三输入信号线；
所述控制单元电路包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管和第一控制信号线，所述第一控制信号线连接所述第一薄膜晶体管的第一控制端、所述第二薄膜晶体管的第二控制端、所述第三薄膜晶体管的第三控制端，所述第一输入信号线、所述第二输入信号线和所述第三输入信号线分别连接所述第一薄膜晶体管的第一输入端、所述第二薄膜晶体管的第二输入端、所述第三薄膜晶体管的第三输入端；
所述输出单元电路包括第一输出信号线、第二输出信号线以及第三输出信号线，所述第一输出信号线、所述第二输出信号线以及所述第三输出信号线分别连接所述第一薄膜晶体管的第一输出端、所述第二薄膜晶体管的第二输出端、所述第三薄膜晶体管的第三输出端；
所述第一输出信号线与所述第一像素列连接，所述第二输出信号线与所述第三像素列连接，所述第三输出信号线与所述第二像素列和所述第四像素列连接。
在本申请实施例所提供的OLED显示面板中，所述第一像素列和所述第三像素列均包括红色子像素和蓝色子像素，所述红色子像素和所述蓝色子像素交替排列；
所述第一像素列中的红色子像素与所述第三像素列中的红色子像素交错排列，所述第一像素列中的蓝色子像素与所述第三像素列中的蓝色子像素交错排列；
在本申请实施例所提供的OLED显示面板中，所述第一输出信号线用于在所述OLED显示面板显示红色画面时向所述第一像素列输入第一时钟信号；
所述第二输出信号线用于在所述OLED显示面板显示红色画面时向所述第三像素列输入第二时钟信号。
在本申请实施例所提供的OLED显示面板中，所述第一时钟信号的高电平和所述第二时钟信号的高电平交替。
在本申请实施例所提供的OLED显示面板中，所述第一时钟信号的高电平大于所述OLED显示面板的电源电压；
所述第二时钟信号的高电平大于所述OLED显示面板的电源电压。
在本申请实施例所提供的OLED显示面板中，所述第三薄膜晶体管用于在所述OLED显示面板显示红色画面时，所述第三薄膜晶体管的第三控制端关闭。
在本申请实施例所提供的OLED显示面板中，所述第一输出信号线用于在所述OLED显示面板显示蓝色画面时向所述第一像素列输入第三时钟信号；
所述第二输出信号线用于在所述OLED显示面板显示蓝色画面时向所述第三像素列输入第四时钟信号。
在本申请实施例所提供的OLED显示面板中，所述第三时钟信号的高电平和所述第四时钟信号的高电平交替。
在本申请实施例所提供的OLED显示面板中，所述第三时钟信号的高电平大于所述OLED显示面板的电源电压；
所述第四时钟信号的高电平大于所述OLED显示面板的电源电压。
在本申请实施例所提供的OLED显示面板中，所述第三薄膜晶体管用于在所述OLED显示面板显示绿色画面时，所述第三薄膜晶体管的第三控制端开启。
 有益效果
本申请的有益效果为：本申请所提供的OLED显示面板将一组六条单元测试信号线缩减为四条，进而能实现对OLED显示面板的红色子像素、绿色子像素以及蓝色子像素的画面检测，更进一步增加了OLED显示面板的屏占比。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术的OLED显示面板的单元测试电路的设计方法。
图2a为本申请提供的OLED显示面板的结构示意图。
图2b为本申请提供的OLED显示面板的单元测试电路的设计方法。
图2c为本申请提供的OLED显示面板的像素阵列的结构示意图。
图3为本申请提供的OLED显示面板的单元测试电路检测单色红色画面时的时钟信号。
图4为本申请提供的OLED显示面板的单元测试电路检测彩色画面时的时钟信号。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
本申请针对现有的OLED显示面板，由于其单元测试电路采用多个TFT，多条信号线，电路设计复杂，进而影响OLED显示面板的屏占比的技术问题，本实施例能够解决该缺陷。
如图1所示，一种现有技术的OLED显示面板的单元测试电路设计。其中，101为输入显示区域中第一行发光层为绿色的单元测试信号线；102为输入显示区域中第一行发光层为蓝色或红色的单元测试信号线；103为输入显示区域中第一行发光层为红色或蓝色的单元测试信号线；104为控制薄膜晶体管T3和薄膜晶体管T6的开关控制信号线；105为控制薄膜晶体管T1和薄膜晶体管T5的开关控制信号线；106为控制薄膜晶体管T2和薄膜晶体管T4的开关控制信号线；107为输出显示区域中第一行发光层为红色或蓝色的数据信号线；108为输出显示区域中第一行发光层为绿色的数据信号线；109为输出显示区域中第一行发光层为蓝色或红色的数据信号线；110为输出显示区域中第一行发光层为绿色的数据信号线。
其工作原理（以全红画面为例）：单元测试信号线103输入低电平数据信号，单元测试信号线101及单元测试信号线102输入高电平数据信号，开关控制信号线105输入低电平信号，开关控制信号线104及开关控制信号线106输入高电平信号，此时薄膜晶体管T1以及薄膜晶体管T5开启，薄膜晶体管T2、薄膜晶体管T3、薄膜晶体管T4以及薄膜晶体管T6关闭，最终像素区域内第一行发光层为红色的OLED发光层发光，其余颜色的OLED发光层不发光；由于开关控制信号线105、开关控制信号线104及开关控制信号线106输入为高平低平信号交替的时钟信号，因此当信号传递至第二行时，开关控制信号线106输入低电平信号，开关控制信号线105输入高电平信号，此时薄膜晶体管T2以及薄膜晶体管T4开启，薄膜晶体管T1、薄膜晶体管T3、薄膜晶体管T5以及薄膜晶体管T6关闭，单元测试信号线103输入低电平数据信号，单元测试信号线101及单元测试信号线102输入高电平数据信号不变，则像素区域内第二行发光层为红色的OLED发光层发光，其余颜色的OLED发光层不发光；由于像素区域内R/G/B排列为第一行RGBG周期排列，第二行BGRG周期排列，奇数行重复第一行排列，偶数行重复第二行排列，因此现有的OLED显示面板能够实现逐层发红光。
现有的OLED显示面板由于其单元测试电路为多个薄膜晶体管设计，电路设计复杂，信号线高达六条，大大降低了OLED显示面板屏占比。
如图2a、图2b以及图2c所示，本申请提供的OLED显示面板，至少包括：
数据信号线201；
扫描信号线202；
像素203，位于所述数据信号线201和所述扫描信号线202绝缘交叉围合之间；
像素阵列2030，所述像素阵列2030包括沿第一方向D1呈矩阵状分布的第一像素列2031、第二像素列2032、第三像素列2033以及第四像素列2034，由所述第一像素列2031、所述第二像素列2032、所述第三像素列2033以及所述第四像素列2034构成的组合沿着所述第一方向D1周期排列；
输入单元电路，包括第一输入信号线204、第二输入信号线205以及第三输入信号线206，其中，所述第一输入信号线204与所述第一像素列2031连接，所述第二输入信号线205与所述第三像素列2033连接，所述第三输入信号线206与所述第二像素列2032和所述第四像素列2034连接；
控制单元电路，包括第一薄膜晶体管T1、第二薄膜晶体管T2、第三薄膜晶体管T3和第一控制信号线207，所述第一控制信号线207连接所述第一薄膜晶体管T1的第一控制端、所述第二薄膜晶体管T2的第二控制端、所述第三薄膜晶体管T3的第三控制端，所述第一输入信号线204、所述第二输入信号线205和所述第三输入信号线206分别连接所述第一薄膜晶体管T1开关的第一输入端、所述第二薄膜晶体管T2的第二输入端、所述第三薄膜晶体管T3的第三输入端；
输出单元电路，包括第一输出信号线208、第二输出信号线209以及第三输出信号线210，所述第一输出信号线208、所述第二输出信号线209以及所述第三输出信号线210分别连接所述第一薄膜晶体管T1的第一输出端、所述第二薄膜晶体管T2的第二输出端、所述第三薄膜晶体管T3的第三输出端；
其中，所述第一输出信号线208与所述第一像素列2031连接，所述第二输出信号线209与所述第三像素列2033连接，所述第三输出信号线210与所述第二像素列2032和所述第四像素列2034连接。
优选地，所述第一像素列2031和所述第三像素列2033均包括红色子像素和蓝色子像素，所述红色子像素和所述蓝色子像素交替排列；所述第一像素列2031中的红色子像素与所述第三像素列2033中的红色子像素交错排列，所述第一像素列2031中的蓝色子像素与所述第三像素列2033中的蓝色子像素交错排列；所述第二像素列2032和所述第四像素列2034均仅包括绿色子像素。
优选地，所述第一输出信号线208用于在所述OLED显示面板显示红色画面时向所述第一像素列2031输入第一时钟信号；所述第二输出信号线209用于在所述OLED显示面板显示红色画面时向所述第三像素列2033输入第二时钟信号；所述第一时钟信号的高电平和所述第二时钟信号的高电平交替；所述第一时钟信号的高电平大于所述OLED显示面板的电源电压；所述第二时钟信号的高电平大于所述OLED显示面板的电源电压。
优选地，所述第三薄膜晶体管T3用于在所述OLED显示面板显示红色画面时，所述第三薄膜晶体管T3的第三控制端关闭。
优选地，所述第一输出信号线208用于在所述OLED显示面板显示蓝色画面时向所述第一像素列2031输入第三时钟信号；所述第二输出信号线209用于在所述OLED显示面板显示蓝色画面时向所述第三像素列2033输入第四时钟信号；所述第三时钟信号的高电平和所述第四时钟信号的高电平交替；所述第三时钟信号的高电平大于所述OLED显示面板的电源电压；所述第四时钟信号的高电平大于所述OLED显示面板的电源电压。
优选地，所述第三薄膜晶体管T3用于在所述OLED显示面板显示绿色画面时，所述第三薄膜晶体管T3的第三控制端开启。
本申请的OLED显示面板的工作原理为（以全红画面为例）：
当扫描信号开始扫描第一行子像素电路时，所述第一输入信号线204输入OLED显示面板的显示区域第一行发光层为红色的像素电路，所述第二输入信号线205输入OLED显示面板的显示区域第一行发光层为蓝色的像素电路，所述第三输入信号线206输入OLED显示面板的显示区域第一行发光层为绿色的像素电路；当发红光时，所述第一输入信号线204输入低电平数据信号，所述第二输入信号线205以及所述第三输入信号线206输入高电平数据信号，且高电平信号大于像素驱动电路的工作电压，所以所述第二输入信号线205连接的蓝色子像素电路以及所述第三输入信号线206连接的绿色子像素电路不接通，由于所述第一输入信号线204输入OLED显示面板的显示区域第一行发光层为红色的像素电路，因此像素区域内第一行发光层为红色的OLED发光层发光，其余颜色的OLED发光层不发光。
所述像素203的区域内红色子像素、绿色子像素、蓝色子像素排列为第一行红色子像素、绿色子像素、蓝色子像素、绿色子像素周期排列，第二行蓝色子像素、绿色子像素、红色子像素、绿色子像素周期排列，奇数行重复第一行排列，偶数行重复第二行排列，且输入的信号为高平低平交替的时钟信号。
当扫描信号开始扫描第二行子像素电路时，所述第一输入信号线204输入OLED显示面板的显示区域第二行发光层为蓝色的像素电路，所述第二输入信号线205输入OLED显示面板的显示区域第二行发光层为红色的像素电路，所述第三输入信号线206输入OLED显示面板的显示区域第二行发光层为绿色的像素电路；所述第一输入信号线204输入高电平数据信号，且高电平数据信号大于所述像素驱动电路的工作电压，此时所述第一输入信号线204输入OLED显示面板的显示区域第二行发光层为蓝色的像素电路不接通；所述第二输入信号线205输入低电平数据信号，此时所述第二输入信号线205输入OLED显示面板的显示区域第二行发光层为红色的像素电路接通；所述第三输入信号线206输入高电平数据信号，且高电平数据信号大于所述像素驱动电路的工作电压，此时所述第三输入信号线206输入OLED显示面板的显示区域第二行发光层为绿色的像素电路不接通；因此像素区域内第二行发光层为红色的OLED发光层发光，其余颜色的OLED发光层不发光。
奇数行重复扫描信号开始扫描第一行子像素电路时的情况，偶数行重复扫描信号开始扫描第二行子像素电路时的情况，所述OLED显示面板实现逐层发红光，且显示效果与一般的OLED显示面板单元测试检测面板时几乎没有显示差别。
如图3所示，301是图2b中单元测试输入信号线输入OLED显示面板的显示区域第一行发光层为红色的数据信号；302是图2b中单元测试输入信号线输入OLED显示面板的显示区域第一行发光层为蓝色的数据信号；数字信号301和数字信号302为图2b中的单元测试信号线中的一对时钟信号，在OLED显示面板显示红色画面时输入交替的时钟信号，其中输入的高电平数据信号需大于所述像素驱动电路的工作电压，这样可以保证在输入高电平数据信号时，像素上的OLED发光层不发光，实现单红色画面。
本申请提供的一种单元测试检测单蓝色画面显示时，所有的发光颜色为蓝色的OLED发光层均发光，显示效果与现有技术的OLED显示面板得到的蓝色画面几乎没有显示差别。
如图4所示，本申请的像素驱动电路在检测彩色画面时，401是单元测试输入信号线输入OLED显示面板的显示区域第一行发光层为红色的数据信号；402是单元测试输入信号线输入OLED显示面板的显示区域第一行发光层为蓝色的数据信号；403是单元测试输入信号线输入OLED显示面板的显示区域第一行发光层为绿色的数据信号；这样得到的彩色画面与现有技术的OLED显示面板得到的彩色画面几乎没有显示差别。
有益效果：本申请所提供的OLED显示面板将一组六条单元测试信号线缩减为四条，进而能实现对OLED显示面板的红色子像素、绿色子像素以及蓝色子像素的画面检测，更进一步增加了OLED显示面板的屏占比。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (10)

  1. 一种OLED显示面板，其中，包括：
    数据信号线；
    扫描信号线；
    像素阵列，所述像素阵列包括沿第一方向呈矩阵状分布的第一像素列、第二像素列、第三像素列以及第四像素列，由所述第一像素列、所述第二像素列、所述第三像素列以及所述第四像素列构成的组合沿着所述第一方向周期排列；
    输入单元电路，包括第一输入信号线、第二输入信号线以及第三输入信号线；
    控制单元电路，包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管和第一控制信号线，所述第一控制信号线连接所述第一薄膜晶体管的第一控制端、所述第二薄膜晶体管的第二控制端、所述第三薄膜晶体管的第三控制端，所述第一输入信号线、所述第二输入信号线和所述第三输入信号线分别连接所述第一薄膜晶体管的第一输入端、所述第二薄膜晶体管的第二输入端、所述第三薄膜晶体管的第三输入端；
    输出单元电路，包括第一输出信号线、第二输出信号线以及第三输出信号线，所述第一输出信号线、所述第二输出信号线以及所述第三输出信号线分别连接所述第一薄膜晶体管的第一输出端、所述第二薄膜晶体管的第二输出端、所述第三薄膜晶体管的第三输出端；
    其中，所述第一输出信号线与所述第一像素列连接，所述第二输出信号线与所述第三像素列连接，所述第三输出信号线与所述第二像素列和所述第四像素列连接。
  2. 根据权利要求1所述的OLED显示面板，其中，所述第一像素列和所述第三像素列均包括红色子像素和蓝色子像素，所述红色子像素和所述蓝色子像素交替排列；
    所述第一像素列中的红色子像素与所述第三像素列中的红色子像素交错排列，所述第一像素列中的蓝色子像素与所述第三像素列中的蓝色子像素交错排列；
    所述第二像素列和所述第四像素列均仅包括绿色子像素。
  3. 根据权利要求2所述的OLED显示面板，其中，所述第一输出信号线用于在所述OLED显示面板显示红色画面时向所述第一像素列输入第一时钟信号；
    所述第二输出信号线用于在所述OLED显示面板显示红色画面时向所述第三像素列输入第二时钟信号。
  4. 根据权利要求3所述的OLED显示面板，其中，所述第一时钟信号的高电平和所述第二时钟信号的高电平交替。
  5. 根据权利要求3所述的OLED显示面板，其中，所述第一时钟信号的高电平大于所述OLED显示面板的电源电压；
    所述第二时钟信号的高电平大于所述OLED显示面板的电源电压。
  6. 根据权利要求2所述的OLED显示面板，其中，所述第三薄膜晶体管用于在所述OLED显示面板显示红色画面时，所述第三薄膜晶体管的第三控制端关闭。
  7. 根据权利要求2所述的OLED显示面板，其中，所述第一输出信号线用于在所述OLED显示面板显示蓝色画面时向所述第一像素列输入第三时钟信号；
    所述第二输出信号线用于在所述OLED显示面板显示蓝色画面时向所述第三像素列输入第四时钟信号。
  8. 根据权利要求7所述的OLED显示面板，其中，所述第三时钟信号的高电平和所述第四时钟信号的高电平交替。
  9. 根据权利要求7所述的OLED显示面板，其中，所述第三时钟信号的高电平大于所述OLED显示面板的电源电压；
    所述第四时钟信号的高电平大于所述OLED显示面板的电源电压。
  10. 根据权利要求2所述的OLED显示面板，其中，所述第三薄膜晶体管用于在所述OLED显示面板显示绿色画面时，所述第三薄膜晶体管的第三控制端开启。
PCT/CN2018/122417 2018-11-14 2018-12-20 Oled显示面板 WO2020098069A1 (zh)

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