WO2019184409A1 - Dispositif d'essai d'affichage luminescent organique et circuit d'essai de panneau d'affichage luminescent organique - Google Patents

Dispositif d'essai d'affichage luminescent organique et circuit d'essai de panneau d'affichage luminescent organique Download PDF

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Publication number
WO2019184409A1
WO2019184409A1 PCT/CN2018/117584 CN2018117584W WO2019184409A1 WO 2019184409 A1 WO2019184409 A1 WO 2019184409A1 CN 2018117584 W CN2018117584 W CN 2018117584W WO 2019184409 A1 WO2019184409 A1 WO 2019184409A1
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Prior art keywords
pixel unit
source signal
signal line
groups
timing
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PCT/CN2018/117584
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English (en)
Chinese (zh)
Inventor
阮伟文
吴锦坤
胡君文
谢志生
苏君海
李建华
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信利（惠州）智能显示有限公司
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Publication of WO2019184409A1 publication Critical patent/WO2019184409A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0218—Addressing of scan or signal lines with collection of electrodes in groups for n-dimensional addressing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours

Definitions

  • the present application relates to the field of illuminating display technologies, and in particular, to an organic light emitting display test device and a test circuit of an organic light emitting display panel.
  • AMOLED Active Matrix/Organic Light Emitting Diode
  • the AMOLED displays a fixed single picture for a long time, the TFT is affected by the bias stress or the brightness of the light is changed due to the attenuation of the light-emitting brightness, resulting in poor display.
  • a checkerboard screen is generally selected as a residual image test screen. After displaying the checkerboard screen for a while, then switch to the gray screen, and the afterimage of the "checkerboard screen" will appear under the gray screen. After the gray screen is illuminated for a sufficient period of time, the afterimage disappears, or after the power is turned off for a sufficient time, the afterimage disappears. This afterimage is also called recoverable afterimage. If the afterimage does not disappear, it is called unrecoverable afterimage. By detecting the time when the afterimage disappears, it is detected whether the display of the AMOLED is acceptable.
  • the conventional image sticking test needs to be displayed by the driver IC after driving the display module to realize the afterimage test, and the display mode is displayed.
  • the group needs to set components such as driver IC, FPC (Flexible Printed Circuit) and polarizer on the panel. If the residual image test is not up to standard, it will cause waste of materials such as driver IC, FPC and polarizer, resulting in production. The test cost is high.
  • an organic light emitting display test device and a test circuit of an organic light emitting display panel are provided.
  • An organic light emitting display test device comprising: a test circuit and a display panel;
  • the display panel includes a plurality of pixel units, each of the pixel units is arranged in a plurality of rows and columns, and each column of the pixel units includes a plurality of first pixel unit groups and a plurality of second pixel unit groups;
  • the test circuit includes at least one source signal line, and the at least one source signal line is respectively connected to each of the first pixel unit group and each of the second pixel unit groups, and the at least one source signal line is set to be at a timing inputting a first signal to each of the first pixel unit groups, a second signal to each of the second pixel unit groups, and being configured to input a second signal to each of the first pixel unit groups at a second timing And inputting a first signal to each of the second pixel unit groups.
  • the at least one source signal line includes a first source signal line and a second source signal line, the first source signal line being connected to each of the first pixel unit groups, the second source a signal line is connected to each of the second pixel unit groups, the first source signal line is configured to input a first signal to each of the first pixel unit groups at a first timing, and to the first The pixel unit group inputs a second signal, the second source signal line is configured to input a second signal to each of the second pixel unit groups at a first timing, and input a second signal to each of the second pixel unit groups at a second timing a signal.
  • a switch circuit is further included, each of the switch circuits has a switch tube, and the control end of each switch tube is configured to receive a turn-on signal, and the at least one source signal line passes through each of the switches.
  • the switching circuit is connected to each of the first pixel unit group and each of the second pixel unit groups.
  • each of the switch circuits includes a plurality of first switch circuit groups and a plurality of second switch circuit groups, each of the first switch circuit groups being coupled to a first pixel unit group, each One second switch circuit group is connected to one of the second pixel unit groups, and the at least one source signal line is connected to each of the first pixel unit groups through each of the first switch circuit groups, the at least one The source signal line is connected to each of the second pixel unit groups through each of the second switch circuit groups, and each of the first group switches is configured to receive an on signal at a first timing to be turned on, and each of the second groups The switch is set to be turned on by receiving an on signal at the second timing.
  • each of the pixel units includes a plurality of red pixel units, a plurality of green pixel units, and a plurality of blue pixel units, each of the red pixel units being disposed in a plurality of columns, each of the green pixel units being multi-column Column arrangement, each of the blue pixel units being arranged in a plurality of columns, the at least one source signal line comprising a red light source signal line, a green light source signal line and a blue light source signal line, the red light source signal line and each column of the red pixel The unit is connected, the green light source signal line is connected to each column of the green pixel unit, and the blue light source signal line is connected to each column of the blue pixel unit.
  • each column of the red pixel unit is disposed adjacent to a column of the green pixel unit and a column of the blue pixel unit.
  • each of the first pixel unit groups includes a plurality of columns of red pixel units, a plurality of columns of green pixel units, and a plurality of columns of blue pixel units, each of the second group of pixel units including a plurality of columns of red pixel units, and more Column green pixel cells and multi-column blue pixel cells.
  • a plurality of scan lines are further included, each of the scan lines being connected to a row of the pixel units.
  • the length of the first timing is an integer multiple of an output time of the scan line to the scan signal of the row of the pixel unit, and the time length of the second timing is one of the scans.
  • the line is an integer multiple of the output time of the scan signal of the pixel unit of one row.
  • An organic light emitting display test device comprising: a test circuit and a display panel;
  • the display panel includes a plurality of pixel units, each of the pixel units is arranged in a plurality of rows and columns, and each column of the pixel units includes a plurality of first pixel unit groups and a plurality of second pixel unit groups;
  • the test circuit includes at least one source signal line, and the at least one source signal line is respectively connected to each of the first pixel unit group and each of the second pixel unit groups, and the at least one source signal line is set to be at a timing inputting a first signal to each of the first pixel unit groups, a second signal to each of the second pixel unit groups, and being configured to input a second signal to each of the first pixel unit groups at a second timing Inputting a first signal to each of the second pixel unit groups;
  • the at least one source signal line includes a first source signal line and a second source signal line, the first source signal line is connected to each of the first pixel unit groups, and the second source signal line and each of the first Two pixel unit groups are connected, the first source signal line is set to input a first signal to each of the first pixel unit groups at a first timing, and to input a second signal to each of the first pixel unit groups at a second timing
  • the second source signal line is configured to input a second signal to each of the second pixel unit groups at a first timing, and input a first signal to each of the second pixel unit groups at a second timing;
  • each of the switch circuits respectively having a switch tube, the control end of each of the switch tubes being configured to receive a turn-on signal, the at least one source signal line passing through each of the switch circuits and each of the a first pixel unit group and each of the second pixel unit groups are connected;
  • Each of the switch circuits includes a plurality of first switch circuit groups and a plurality of second switch circuit groups, each of the first switch circuit groups being coupled to a first pixel unit group, and each of the second switch circuits
  • the group is connected to a second pixel unit group, and the at least one source signal line is connected to each of the first pixel unit groups through each of the first switch circuit groups, and the at least one source signal line passes through each of the a second switch circuit group is connected to each of the second pixel unit groups, each of the first group switches is configured to be turned on at a first timing, and each of the second group switches is set at a second timing Receiving a turn-on signal and conducting;
  • each of the scan lines being connected to a row of the pixel units;
  • the length of the first timing is an integer multiple of the output time of the scan line to the scan signal of the row of the pixel unit, and the length of the second timing is one scan line to the pixel unit of the row
  • the output time of the scan signal is an integer multiple.
  • a test circuit of an organic light emitting display panel comprising at least one source signal line, the at least one source signal line being disposed to be connected to a plurality of first pixel unit groups and a plurality of second pixel unit groups, the at least one source signal
  • the line is configured to input a first signal to each of the first pixel unit groups at a first timing, a second signal to each of the second pixel unit groups, and to input a first signal to each of the first pixel unit groups at a second timing
  • the two signals input a first signal to each of the second group of pixel units.
  • the at least one source signal line includes a first source signal line and a second source signal line, the first source signal line being connected to each of the first pixel unit groups, the second source a signal line is connected to each of the second pixel unit groups, the first source signal line is configured to input a first signal to each of the first pixel unit groups at a first timing, and to the first The pixel unit group inputs a second signal, the second source signal line is configured to input a second signal to each of the second pixel unit groups at a first timing, and input a second signal to each of the second pixel unit groups at a second timing a signal.
  • a switch circuit is further included, each of the switch circuits has a switch tube, and the control end of each switch tube is configured to receive a turn-on signal, and the at least one source signal line passes through each of the switches.
  • the switching circuit is connected to each of the first pixel unit group and each of the second pixel unit groups.
  • each of the switch circuits includes a plurality of first switch circuit groups and a plurality of second switch circuit groups, each of the first switch circuit groups being coupled to a first pixel unit group, each One second switch circuit group is connected to one of the second pixel unit groups, and the at least one source signal line is connected to each of the first pixel unit groups through each of the first switch circuit groups, the at least one The source signal line is connected to each of the second pixel unit groups through each of the second switch circuit groups, and each of the first group switches is configured to receive an on signal at a first timing to be turned on, and each of the second groups The switch is set to be turned on by receiving an on signal at the second timing.
  • a plurality of scan lines are further included, each of the scan lines being connected to a row of the pixel units.
  • the length of the first timing is an integer multiple of an output time of the scan line to the scan signal of the row of the pixel unit, and the time length of the second timing is one of the scans.
  • the line is an integer multiple of the output time of the scan signal of the pixel unit of one row.
  • a test circuit of an organic light emitting display panel comprising at least one source signal line, the at least one source signal line being disposed to be connected to a plurality of first pixel unit groups and a plurality of second pixel unit groups, the at least one source signal The line is configured to input a first signal to each of the first pixel unit groups at a first timing, a second signal to each of the second pixel unit groups, and to input a first signal to each of the first pixel unit groups at a second timing a second signal, inputting a first signal to each of the second pixel unit groups;
  • the at least one source signal line includes a first source signal line and a second source signal line, the first source signal line is connected to each of the first pixel unit groups, and the second source signal line and each of the first Two pixel unit groups are connected, the first source signal line is set to input a first signal to each of the first pixel unit groups at a first timing, and to input a second signal to each of the first pixel unit groups at a second timing
  • the second source signal line is configured to input a second signal to each of the second pixel unit groups at a first timing, and input a first signal to each of the second pixel unit groups at a second timing;
  • each of the switch circuits respectively having a switch tube, the control end of each of the switch tubes being configured to receive a turn-on signal, the at least one source signal line passing through each of the switch circuits and each of the a first pixel unit group and each of the second pixel unit groups are connected;
  • Each of the switch circuits includes a plurality of first switch circuit groups and a plurality of second switch circuit groups, each of the first switch circuit groups being coupled to a first pixel unit group, and each of the second switch circuits
  • the group is connected to a second pixel unit group, and the at least one source signal line is connected to each of the first pixel unit groups through each of the first switch circuit groups, and the at least one source signal line passes through each of the a second switch circuit group is connected to each of the second pixel unit groups, each of the first group switches is configured to be turned on at a first timing, and each of the second group switches is set at a second timing Receiving a turn-on signal and conducting;
  • each of the scan lines being connected to a row of the pixel units;
  • the length of the first timing is an integer multiple of the output time of the scan line to the scan signal of the row of the pixel unit, and the length of the second timing is one scan line to the pixel unit of the row
  • the output time of the scan signal is an integer multiple.
  • the above-mentioned organic light-emitting display test device and the test circuit of the organic light-emitting display panel divide the plurality of columns of pixel units of the display panel into a plurality of first pixel unit groups and a plurality of second pixel unit groups, respectively, by respectively
  • the pixel unit group and each of the second pixel unit groups respectively input the first signal and the second signal, and cooperate with the scan signal, so that each pixel unit on the display panel displays the checkerboard screen, thereby implementing the residual image test on the display panel without
  • the components such as the driving chip, the flexible circuit board, and the polarizer are mounted on the display panel, thereby effectively avoiding the waste of the above components, and effectively reducing the production and testing costs.
  • FIG. 1 is a circuit schematic diagram of an organic light emitting display test apparatus of an embodiment
  • 2 is a timing diagram of source signals of an embodiment
  • FIG. 3 is a schematic diagram showing the circuit structure of a pixel circuit of an embodiment
  • FIG. 4 is a schematic diagram of a checkerboard screen of a display panel of an embodiment
  • FIG. 5 is a circuit schematic diagram of an organic light emitting display test device of another embodiment
  • 6 to 8 are timing diagrams of a source signal, a scan signal, and an on signal, respectively, of another embodiment.
  • an organic light emitting display test apparatus includes: a test circuit and a display panel; the display panel includes a plurality of pixel units, each of the pixel units is arranged in a plurality of rows and columns, and each column of the pixel units includes a plurality of a first pixel unit group and a plurality of second pixel unit groups; the test circuit includes at least one source signal line, the at least one source signal line and each of the first pixel unit groups and each of the second pixels a unit group connection, the at least one source signal line is configured to input a first signal to each of the first pixel unit groups at a first timing, a second signal to each of the second pixel unit groups, and The second timing inputs a second signal to each of the first pixel unit groups, and inputs a first signal to each of the second pixel unit groups.
  • an organic light emitting display test apparatus includes: a test circuit 100 and a display panel 200; the display panel 200 includes a plurality of pixel units 210, each of the pixel units being in multiple rows a multi-column arrangement, and each column of the pixel unit includes a plurality of first pixel unit groups and a plurality of second pixel unit groups; the test circuit includes at least one source signal line, and the at least one source signal line and each The first pixel unit group and each of the second pixel unit groups are connected, and the at least one source signal line is configured to input a first signal to each of the first pixel unit groups at a first timing, to each of the first The two pixel unit group inputs the second signal, and is configured to input a second signal to each of the first pixel unit groups at a second timing, and input a first signal to each of the second pixel unit groups.
  • the area of AA (Available Display Area) in FIG. 1 is a display area of the display panel, and each pixel unit includes a pixel circuit and an organic light emitting device, and each of the pixel circuits and the organic light emitting device The device is connected and the source signal lines (VD1, VD2) are used to provide a source signal (source signal) for the pixel unit.
  • each column of pixel units is divided into a plurality of first pixel unit groups and a plurality of second pixel unit groups, each of the plurality of first pixel unit groups includes adjacent multi-column pixel units, and each of the second pixel units The group includes adjacent multi-column pixel units.
  • Each of the first pixel unit groups is adjacent to a second pixel unit group.
  • there is a second pixel unit group between each two first pixel unit groups for example, each of the first pixel unit groups and each The second pixel unit group is arranged in sequence, that is, each of the first pixel unit group and each of the second pixel unit groups is disposed between the plum blossoms.
  • the display test apparatus further includes a plurality of scan lines, each of the scan lines being connected to one row of the pixel units.
  • the scan line is used to provide a scan signal for the pixel unit.
  • the first signal is a low level signal
  • the second signal is a high level signal.
  • the lower the source signal voltage the greater the brightness of the organic light emitting device, and the higher the source signal voltage, the brightness of the organic light emitting device.
  • the brightness is different, for example, the first pixel unit group displays white, the second pixel unit group displays black, and the scan signal is matched so that each row of pixel circuits receives the voltage difference between the source signal voltage and the scan signal, so that adjacent rows of lines
  • the pixel circuit emits light of a different brightness than the other adjacent multi-row pixel circuits, thereby forming a checkerboard pattern of black and white grids on the display panel. Thereby performing a residual image test on the display panel.
  • the traditional display panel needs to input data signals and scan signals to each pixel circuit through the driving chip, thereby controlling each area to display black or white respectively, if the residual image of the display panel is tested.
  • the display panel is a defective product.
  • components such as a driver chip, a flexible circuit board, and a polarizer mounted on the display panel are scrapped, thereby causing waste of components such as a driver chip, a flexible circuit board, and a polarizer.
  • the organic light emitting display test apparatus further includes a signal input module connected to the at least one source signal line and the scan line, for example, the signal input module is configured to provide a scan signal and a source signal.
  • the signal input module can be provided with a quick connection interface for connecting the at least one source signal line and the scan line, so that the signal input module can be set independently of the display panel, for example, the signal
  • the input module is a test device for providing a test signal.
  • the test signal includes a scan signal and a source signal.
  • the test signal further includes a control signal, and the control signal is used to provide a control signal to the shift register.
  • the register generates a scan signal for each row.
  • the signal input module is further configured to provide a power source.
  • the signal input module is further configured to provide a first power source ELVDD and a second power source ELVSS.
  • the signal input module sets the first interface and a second interface, the first interface is configured to connect the at least one source signal line, the second interface is used to connect a scan line, and the signal input module is configured to send the at least one source signal line through the first interface
  • a source signal is provided for providing a scan signal to the scan line through a second interface.
  • the at least one source signal line includes the first source signal line VD1 and the first a second source signal line VD2, the first source signal line VD1 is connected to each of the first pixel unit groups, and the second source signal line VD2 is connected to each of the second pixel unit groups, the first source signal a line for inputting a first signal to each of the first pixel unit groups at a first timing, and a second signal to each of the first pixel unit groups at a second timing, the second source signal line being used for A timing inputting a second signal to each of the second pixel unit groups, and inputting a first signal to each of the second pixel unit groups at a second timing.
  • the source signal lines are two, including a first source signal line and a second source signal line, for example, the first source signal line and each column in each of the first pixel unit groups.
  • the pixel unit is connected, for example, the second source signal line is connected to each column of the pixel unit in each of the second pixel unit groups.
  • the two source signal lines are respectively connected to the first pixel unit group and the second pixel unit group, so that source signals can be respectively supplied to the column of the first pixel unit group, and the pixel unit Each of the pixel units of each column of the two pixel unit group.
  • the first source signal line inputs a first signal to each of the first pixel unit groups, and the second source signal line inputs a second signal to each of the second pixel unit groups such that the first row is in the same row
  • the pixel unit group displays white, and the second pixel unit group displays black
  • the first source signal line inputs a second signal to each of the first pixel unit groups, and the second source signal line to each of the second pixels
  • the unit group inputs the first signal, so that the first pixel unit group in the same row displays black, and the second pixel unit group displays white, thereby realizing the display of the checkerboard screen, thereby implementing the afterimage test of the display panel.
  • the organic light emitting display test apparatus further includes a plurality of switch circuits, each of the switch circuits respectively having a switch tube 310, and each of the switch tubes 310
  • the control terminal is configured to receive a turn-on signal, and the at least one source signal line is connected to each of the first pixel unit groups and each of the second pixel unit groups through each of the switch circuits.
  • each switching circuit is connected to a column of pixel units.
  • each switching circuit is connected in one-to-one correspondence with each column of pixel units.
  • the at least one source signal line is connected to a column of pixel units through a switching circuit, for example, The at least one source signal line is connected to each column of pixel units in each of the first group of pixel units and each column of pixel units in each of the second group of pixel units through each of the switching circuits.
  • a part of the switching circuit is connected in one-to-one correspondence with each column of pixel units in each of the first pixel unit groups.
  • a part of the switching circuit is connected in one-to-one correspondence with each column of pixel units in each of the second pixel unit groups.
  • the switch circuit is configured to control the voltage of the source signal.
  • the control end of the switch tube receives the turn-on signal SW (switch, switch)
  • the switch tube is turned on, so that the switch circuit is turned on, thereby causing the at least A source signal line is coupled to each of the first pixel unit groups and each of the second pixel unit groups such that a source signal can be input to the first pixel unit group and each of the second pixel unit groups.
  • the switching transistor is a TFT (Thin Film Transistor).
  • the first source signal line is connected to each of the first pixel unit groups through each of the first switch circuit groups, and the second source signal line passes through each of the second switch circuit groups and each of the first Two pixel unit groups are connected, the first source signal line is for inputting a first signal to each of the first pixel unit groups at a first timing, and inputting a second signal to each of the first pixel unit groups at a second timing
  • the second source signal line is configured to input a second signal to each of the second pixel unit groups at a first timing, and input a first signal to each of the second pixel unit groups at a second timing.
  • each of the switches when the on signal SW is at a low level, each of the switches is turned on.
  • the first source signal line VD1 provides a V1 voltage
  • the second source signal line VD2 provides a V2 voltage
  • the source of each column of the first pixel unit group receives the source.
  • the signal voltage is V1 voltage
  • the source signal voltage received by each column of pixel units of the second pixel unit group is V2 voltage.
  • the first source signal line VD1 provides a V2 voltage
  • the second source signal line VD2 provides a V1 voltage.
  • the source signal voltage received by each column of pixel units of the first pixel unit group is a V2 voltage
  • a second The source signal voltage received by each column of pixel units of the pixel unit group is a V1 voltage
  • the first timing and the second timing are cyclically executed, so that the first pixel unit group and the second pixel unit group sequentially display white and black, respectively.
  • the length of the first timing is one line of the scan line.
  • each row of pixel units in the first pixel unit group and the second pixel unit group can scan the pixel units of the integer row in the first timing or the second timing when scanning, thereby causing the display panel to be in the column direction.
  • the adjacent first pixel unit group and the second pixel unit group respectively display black and white, and the plurality of rows of pixel units and the adjacent other plurality of rows of pixel units can respectively display black and white, thereby realizing display of the checkerboard screen.
  • the afterimage test of the display panel is realized.
  • each of the organic light-emitting devices is an OLED (Organic Light-Emitting Diode), each column.
  • the pixel circuit is connected to a parasitic capacitance CP.
  • Each pixel circuit includes a first transistor T1, a second transistor T2, a third transistor T3, and a pixel capacitor C.
  • the source signal line is connected to the parasitic capacitance CP of each column of pixel circuits.
  • the source of the first transistor T1 is connected to the source signal line source, the drain of the first transistor T1 is connected to the VG node, and the gate of the first transistor T1 is connected to the scan line SCAN ⁇ n> corresponding to the pixel circuit of the row.
  • the source of the second transistor T2 is connected to the first power source ELVDD, the drain of the second transistor T2 is connected to the anode of the OLED, and the gate of the second transistor T2 is connected to the VG node.
  • the source of the third transistor T3 is connected to the VG node, the drain of the third transistor T3 is connected to the initialization power supply VINIT, and the gate of the third transistor T3 is connected to the scan line SCAN ⁇ n-1> corresponding to the pixel circuit of the previous row.
  • the cathode of the OLED is connected to the second power source ELVSS.
  • One end of the pixel capacitor C is connected to the first power source ELVDD, and the other end of the pixel capacitor C is connected to the VG node.
  • the scan signal is sequentially scanned from the first row of pixel units of the display panel to the last row of pixel units, and the scanning time of the pixel units of all rows is completed for one frame time.
  • the scan signal is scanned to the nth row and the source signal is written to the pixel circuit of the nth row.
  • the third transistor T3 is turned on, the pixel capacitor C is reset, the first transistor T1 is turned on during the scanning phase, and the source voltage is written to the pixel capacitor C.
  • the V1 voltage is higher and the V2 voltage is lower.
  • the source voltage of the first pixel unit group is higher, and the source voltage of the second pixel unit group is lower. Therefore, the first pixel unit The group corresponds to display black, and the second pixel unit group displays white.
  • the source voltage of the first pixel unit group is lower, and the source voltage of the second pixel unit group is higher. Therefore, the first pixel unit group corresponds to display white, and the second pixel unit group corresponds to display black.
  • each of the switch circuits includes a plurality of first switch circuit groups SW1 and a plurality of second switch circuit groups SW2, and each of the first switch circuit groups SW1 is connected to a first pixel unit group.
  • Each of the second switch circuit groups SW2 is connected to a second pixel unit group, and the at least one source signal line is connected to each of the first pixel unit groups through each of the first switch circuit groups, And at least one source signal line is connected to each of the second pixel unit groups through each of the second switch circuit groups, and each of the first group switches is configured to receive an on signal at a first timing to be turned on, each of the The two sets of switches are used to receive the on signal at the second timing and are turned on.
  • each switch circuit in each first switch circuit group is connected to a column of pixel units in the first pixel unit group, for example, each switch circuit and the second in each second switch circuit group a column of pixel units in the pixel unit group is connected, that is, a switching circuit of each of the first switching circuit groups is connected to the column of pixel units in the first pixel unit group, and a switching circuit of each of the second switching circuit groups is
  • Each column of pixel units in the second pixel unit group is connected in one-to-one correspondence, for example, the control ends of the respective switching circuits of the first switching circuit group are configured to receive the same conduction signal, and the control circuits of the second switching circuit group are controlled.
  • the terminal is configured to receive the same on-signal, so that the on-signal is respectively sent to the switch circuit of the first switch circuit group and the switch circuit of the second switch circuit group at different timings, so that the first pixel unit group and the second pixel unit are respectively
  • the group receives the source signals in different timings, thereby enabling the source signals input to the first pixel unit group and the second pixel unit group to be controlled.
  • each of the pixel units includes a plurality of red pixel units R, a plurality of green pixel units G, and a plurality of blue pixel units B, each of which The red pixel unit R is disposed in a plurality of columns, each of the green pixel units G is disposed in a plurality of columns, each of the blue pixel units B is disposed in a plurality of columns, and the at least one source signal line includes a red light source signal line VDR, green a light source signal line VRG and a blue light source signal line VRB, the red light source signal line VDR is connected to each column of the red pixel unit, and the green light source signal line VRG is connected to each column of the green pixel unit, the blue light source signal The line VRB is connected to each of the column of blue pixel units.
  • the display panel 200 includes a plurality of red pixel units R, a plurality of green pixel units G, and a plurality of blue pixel units B, that is, the pixel units are divided into red pixel units, green pixel units, and blue according to the color of the light.
  • the pixel unit, or the pixel unit is divided into a red pixel unit, a green pixel unit, and a blue pixel unit according to the luminescent color of the OLED, and the pixel units of the same color are arranged in the same column, so that the display panel includes multiple columns of red pixel units and multiple columns.
  • the pixel unit, the multi-column green pixel unit, and the multi-column blue pixel unit are sequentially arranged in this order.
  • the number of source signal lines is three, which are a red light source signal line, a green light source signal line, and a blue light source signal line.
  • a red light source signal line is used to input a source signal to each column of red pixel units, and a green light source signal line is used.
  • the blue source signal line is for inputting a source signal to each column of blue pixel units, for example, a red light source signal line is used to input a first signal to each column of red pixel units at a first timing, for example
  • the green light source signal line is configured to input a first signal to each column of green pixel units at a first timing, for example, the blue light source signal line is used to input a first signal to each column of blue pixel units at a first timing, for example, a red light source signal
  • the line is for inputting a second signal to each column of red pixel units at a second timing, for example, the green light source signal line is for inputting a second signal to each column of green pixel units at a second timing, for example, a blue light source signal line is used for The second timing inputs a second signal to each column of blue pixel units.
  • each column of the red pixel unit and a column of the green pixel unit and a column of the blue pixel unit are sequentially Adjacent settings.
  • each of the first pixel unit groups includes a plurality of columns of red pixel units, a plurality of columns of green pixel units, and a plurality of columns of blue pixel units
  • each of the second group of pixel units including a plurality of columns of red pixel units, a plurality of columns of green pixel units, and Multi-column blue pixel unit.
  • the red light source signal line is used to input a first signal to each column of red pixel units of the first pixel unit group at a first timing, for example, the green light source signal line is used for each column of the first pixel unit group at the first timing.
  • the green pixel unit inputs a first signal, for example, a blue light source signal line for inputting a first signal to each column of blue pixel units of the first pixel unit group at a first timing; for example, a red light source signal line is used for the second timing direction
  • a first signal for example, a blue light source signal line for inputting a first signal to each column of blue pixel units of the first pixel unit group at a first timing
  • a red light source signal line is used for the second timing direction
  • Each column of red pixel units of the first pixel unit group inputs a second signal, for example, a green light source signal line is used to input a second signal to each column of green pixel units of the first pixel unit group at a second timing, for example, a blue light source signal
  • the line is for inputting a second signal to each column of blue pixel units of the first group of pixel cells at a second timing.
  • the red light source signal line is for inputting a second signal to each column of red pixel units of the second pixel unit group at the first timing
  • the green light source signal line is used for each column of the second pixel unit group at the first timing.
  • the green pixel unit inputs a second signal, for example, a blue light source signal line for inputting a second signal to each column of blue pixel units of the second pixel unit group at a first timing; for example, a red light source signal line is used for the second timing direction
  • Each column of red pixel units of the second pixel unit group inputs a first signal, for example, a green light source signal line is used to input a first signal to each column of green pixel units of the second pixel unit group at a second timing, for example, a blue light source signal
  • the line is used to input a first signal to each column of blue pixel cells of the second group of pixel cells at a second timing.
  • the red light source signal line, the green light source signal line, and the blue light source signal line can respectively input source signals to the first pixel unit group and the second pixel unit group at different timings, so that the display panel can display a single color and realize color. Screen test.
  • the source signals can be respectively input to the first pixel unit group and the second pixel unit group, for example, the red light source signal lines pass through the plurality of switch circuits of the first switch circuit group and the first pixel unit.
  • the red pixel unit of each column of the group is connected, and the red light source signal line is connected to the red pixel unit of each column of the second pixel unit group through a plurality of switch circuits of the second switch circuit group; for example, the green light source
  • the signal line is connected to the green pixel unit of each column of the first pixel unit group through a plurality of switch circuits of the first switch circuit group, and the green light source signal line passes through the plurality of switch circuits and the second pixel of the second switch circuit group
  • the green pixel unit is connected to each column of the cell group; for example, the blue light source signal line is connected to the blue pixel unit of each column of the first pixel unit group through a plurality of switching circuits of the first switching circuit group, the blue light The source signal line is connected to the blue pixel unit of each column of the second pixel unit group through a plurality of switching circuits of the second switching circuit group.
  • the source signal lines of the respective colors can be the first pixel unit group and the first Two pixel unit group input source signal.
  • each switch circuit of the first switch circuit group is turned on, and the plurality of switch circuits of the second switch circuit group are turned off, and the red light source signal line, the green light source signal line, and the blue light source signal line are input to the display panel.
  • each column of pixel units of the first pixel unit group receives the first signal, and each column of the second pixel unit group does not receive the first signal; in the second timing, the switches of the second switching circuit group
  • the circuit is turned on, the plurality of switch circuits of the first switch circuit group are turned off, and the red light source signal line, the green light source signal line, and the blue light source signal line input the first signal to the display panel.
  • the columns of the second pixel unit group are pixels. The unit receives the first signal, and each column of pixel units of the first group of pixel units does not receive the first signal.
  • the display panel 200 includes a plurality of red pixel units R, a plurality of green pixel units G, and a plurality of blue pixel units B.
  • AA is a display area of the display panel
  • the source signal line is The red light source signal line VDR, the green light source signal line VDG, and the blue light source signal line VDB are included, and the red light source signal line is connected to the red pixel unit of each column of the first pixel unit group through a plurality of switch circuits of the first switch circuit group SW1.
  • the red light source signal line VDR is connected to the red pixel unit of each column of the second pixel unit group through a plurality of switch circuits of the second switch circuit group SW2, and the green light source signal line VDG passes through the first switch circuit group SW1.
  • the plurality of switching circuits are connected to the green pixel units of each column of the first pixel unit group, and the green light source signal line VDG passes through the plurality of switching circuits of the second switching circuit group SW2 and the columns of the second pixel unit group.
  • the blue light source signal line VDB is connected to the blue pixel unit of each column of the first pixel unit group through a plurality of switch circuits of the first switch circuit group SW1, and the blue light source signal line VDB passes through Two open A plurality of switching circuit SW2 is set circuit connected to the second column of the blue pixels of each pixel unit cell group.
  • the pixel circuit structure of the pixel unit in this embodiment is shown in FIG. 3. Please refer to FIG. 5 to FIG. 8 together.
  • the first switch circuit group SW1 and the second switch circuit group SW2 are sequentially enabled.
  • the data signal is written to each parasitic capacitance Cp in AA.
  • the first transistor T1 of the pixel circuit is turned on, and the data voltage is written to the pixel capacitor C.
  • A represents the timing of Fig. 6, and B represents the timing of Fig. 7.
  • the first stage (t1) is the A timing. At this time, the first pixel unit group corresponds to display white, the second pixel unit group corresponds to display black; the second stage (t2) is B timing, and the first pixel unit group corresponds to display black.
  • the second pixel unit group corresponds to display white.
  • the embodiment can also drive to illuminate a full screen monochrome picture.
  • the first switch circuit group SW1 and the second switch circuit group SW2 simultaneously give a constant low level, and a predetermined voltage is input to the display panel through the red light source signal line VDR, the green light source signal line VDG, and the blue light source signal line VDB.
  • Step 1 Light up the white screen, adjust the V2 voltage so that the display panel displays a white screen, and when the white brightness of the white screen reaches the preset brightness, record the voltage value of V2.
  • Step 2 Light up the gray screen, adjust the V3 voltage so that the display panel displays a gray screen, and when the gray brightness of the gray screen reaches the preset brightness, record the voltage value of V3.
  • Step 3 Use the above test circuit and drive timing to cause the display panel to display a checkerboard screen for several minutes.
  • Step 4 Switch to the gray screen and record the afterimage recovery time.
  • a test circuit for an organic light emitting display panel including at least one source signal line, the at least one source signal line being used for connecting with a plurality of first pixel unit groups and a plurality of second pixel unit groups
  • the at least one source signal line is configured to input a first signal to each of the first pixel unit groups at a first timing, and input a second signal to each of the second pixel unit groups, at a second timing
  • the first pixel unit group inputs a second signal, and inputs a first signal to each of the second pixel unit groups.
  • a test circuit of an organic light emitting display panel further includes a signal input module, and the signal input module is connected to the at least one source signal line and the scan line, for example, the signal input module is configured to provide a scan signal and Source signal.
  • the signal input module can be provided with a quick connection interface for connecting the at least one source signal line and the scan line, so that the signal input module can be set independently of the display panel, for example, the signal
  • the input module is a test device for providing a test signal.
  • the test signal includes a scan signal and a source signal.
  • the test signal further includes a control signal, and the control signal is used to provide a control signal to the shift register.
  • the register generates a scan signal for each row.
  • the signal input module is further configured to provide a power source.
  • the signal input module is further configured to provide a first power source ELVDD and a second power source ELVSS.
  • the signal input module sets the first interface and a second interface, the first interface is configured to connect the at least one source signal line, the second interface is used to connect a scan line, and the signal input module is configured to send the at least one source signal line through the first interface
  • a source signal is provided for providing a scan signal to the scan line through a second interface.
  • test circuit of the organic light emitting display panel in this embodiment can be applied to the organic light emitting display test device in any of the above embodiments.

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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

L'invention concerne un dispositif d'essai d'affichage luminescent organique, ainsi qu'un circuit d'essai (100) d'un panneau d'affichage luminescent organique. Le dispositif d'essai comprend un circuit d'esai (100) et un panneau d'affichage (200) ; le panneau d'affichage (200) comprend une pluralité d'unités de pixel (210), et chaque colonne des unités de pixel (210) comprend une pluralité de premiers groupes d'unités de pixel et une pluralité de seconds groupes d'unités de pixel ; le circuit d'essai (100) comprend au moins une ligne de signal de source (VD1, VD2), et cette au moins une ligne de signal de source (VD1, VD2) est respectivement connectée à chaque premier groupe d'unités de pixel et à chaque second groupe d'unités de pixel. Au moyen d'une division d'une pluralité de colonnes d'unités de pixels (210) du panneau d'affichage (200) en la pluralité de premiers groupes d'unités de pixels et en la pluralité de seconds groupes d'unités de pixels, et d'une entrée, à des moments différents, d'un premier signal et d'un second signal respectivement pour chaque premier groupe d'unités de pixel et chaque second groupe d'unités de pixel, chaque unité de pixel (210) sur le panneau d'affichage (200) affiche une image en damier, un essai de collage d'image du panneau d'affichage (200) est mis en œuvre, sans montage, sur le panneau d'affichage (200), de composants tels qu'une puce d'excitation, une carte à circuit imprimé flexible et un polariseur, ce qui permet d'éviter un gaspillage des composants.
PCT/CN2018/117584 2018-03-27 2018-11-27 Dispositif d'essai d'affichage luminescent organique et circuit d'essai de panneau d'affichage luminescent organique WO2019184409A1 (fr)

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