WO2019184409A1

WO2019184409A1 - Organic light emitting display test device and test circuit for organic light emitting display panel

Info

Publication number: WO2019184409A1
Application number: PCT/CN2018/117584
Authority: WO
Inventors: 阮伟文; 吴锦坤; 胡君文; 谢志生; 苏君海; 李建华
Original assignee: 信利（惠州）智能显示有限公司
Priority date: 2018-03-27
Filing date: 2018-11-27
Publication date: 2019-10-03
Also published as: CN108399879A

Abstract

An organic light emitting display test device and a test circuit (100) for an organic light emitting display panel. The test device comprises a test circuit (100) and a display panel (200); the display panel (200) comprises a plurality of pixel units (210), and each column of the pixel units (210) comprises a plurality of first pixel unit groups and a plurality of second pixel unit groups; the test circuit (100) comprises at least one source signal line (VD1, VD2), and the at least one source signal line (VD1, VD2) is respectively connected to each first pixel unit group and each second pixel unit group. By dividing a plurality of columns of pixel units (210) of the display panel (200) into the plurality of first pixel unit groups and the plurality of second pixel unit groups, and respectively inputting a first signal and a second signal to each first pixel unit group and each second pixel unit group at different timings, each pixel unit (210) on the display panel (200) displays a checkerboard image, image sticking test of the display panel (200) is implemented, without mounting components such as a drives chip, a flexible circuit board, and a polarizer on the display panel (200), thereby avoiding a waste of the components.

Description

Organic light emitting display test device and test circuit of organic light emitting display panel

The present application claims priority to Chinese Patent Application No. 201810259887.4, filed on March 27, 2018, entitled "Test Circuit for Organic Light Emitting Display Test Device and Organic Light Emitting Display Panel", the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

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.

Background technique

AMOLED (Active Matrix/Organic Light Emitting Diode) is a self-luminous type display device with advantages of high contrast, fast response, and low power consumption.

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.

In order to test AMOLED, 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.

Since the input of the data signal of the checkerboard screen is complicated, 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.

Summary of the invention

According to various embodiments of the present application, 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.

In one embodiment, 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.

In one embodiment, 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.

In one embodiment, 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.

In one embodiment, 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.

In one embodiment, 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.

In one embodiment, 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.

In one of the embodiments, a plurality of scan lines are further included, each of the scan lines being connected to a row of the pixel units.

In one embodiment, 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.

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;

Further comprising a plurality of switch circuits, 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;

Also including a plurality of scan lines, 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.

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 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.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and those skilled in the art can obtain drawings of other embodiments according to the drawings without any creative work.

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;

3 is a schematic diagram showing the circuit structure of a pixel circuit of an embodiment;

4 is a schematic diagram of a checkerboard screen of a display panel of an embodiment;

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.

detailed description

In order to facilitate the understanding of the present application, the present application will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. However, the application can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the understanding of the disclosure of the present application will be more thorough.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning meaning meaning The terminology used in the description of the invention herein is for the purpose of describing the particular embodiments The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

For example, 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.

In the above embodiment, by dividing the plurality of columns of pixel units of the display panel into the plurality of first pixel unit groups and the plurality of second pixel unit groups, respectively, by using the first pixel unit group and each of the second pixel unit groups at different timings. The first signal and the second signal are respectively input, and the scanning signal is matched, so that each pixel unit on the display panel displays a checkerboard screen, thereby performing a residual image test on the display panel without installing a driving chip and a flexible circuit board on the display panel. As well as components such as polarizers, the waste of the above components is effectively avoided, and the production and testing costs are effectively reduced.

In one embodiment, as shown in FIG. 1 , 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.

Specifically, 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. In this embodiment, 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. For example, 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.

In this embodiment, 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.

In this embodiment, the first signal is a low level signal, and 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 smaller, in the first timing, each first pixel unit group receives the first signal, and each second pixel unit group receives the second signal, so that the first pixel unit group and the second pixel unit group adjacent to the display panel are displayed. 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.

It is worth mentioning that in order to display the black and white checkerboard screen, 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. When the film is not passed, the display panel is a defective product. As a result, 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.

In order to realize input of a signal, for example, 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. It is worth mentioning that 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. For example, the test signal includes a scan signal and a source signal. For example, 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. For example, the signal input module is further configured to provide a power source. For example, the signal input module is further configured to provide a first power source ELVDD and a second power source ELVSS. For example, 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.

In order to better provide the source signal for each of the first pixel unit group and each of the second pixel unit groups, in one embodiment, referring again to FIG. 1, 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.

In this embodiment, 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. Specifically, in this embodiment, 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.

In a first timing, 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; in the second timing, 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.

In an embodiment, as shown in FIG. 1 , 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.

For example, each switching circuit is connected to a column of pixel units. For example, each switching circuit is connected in one-to-one correspondence with each column of pixel units. For example, 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. For example, 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. For example, 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.

In this embodiment, the switch circuit is configured to control the voltage of the source signal. When 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. For example, the switching transistor is a TFT (Thin Film Transistor).

For example, 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.

In this embodiment, when the on signal SW is at a low level, each of the switches is turned on. Referring to FIG. 1 and FIG. 2, in the first timing (t1), the first source signal line VD1 provides a V1 voltage, and the second source signal line VD2 provides a V2 voltage, and the source of each column of the first pixel unit group receives the source. The signal voltage is V1 voltage, and the source signal voltage received by each column of pixel units of the second pixel unit group is V2 voltage. In the second timing (t2), the first source signal line VD1 provides a V2 voltage, and 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, and a second The source signal voltage received by each column of pixel units of the pixel unit group is a V1 voltage, and thereafter 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.

In order to enable the display unit to display black and white at different timings on the respective rows of the display panel, thereby displaying the checkerboard screen, in one embodiment, the length of the first timing is one line of the scan line. An integer multiple of an output time of the scan signal of the pixel unit, wherein the time length of the second timing is an integer multiple of an output time of the scan line to the scan signal of the pixel unit of the row.

In this way, 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. In turn, the afterimage test of the display panel is realized.

Specifically, the pixel circuit of the 3T1C structure is taken as an example, and is further illustrated in this embodiment. In this embodiment, as shown in FIG. 3, 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. Specifically, 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.

When the display panel is working, in combination with FIG. 1 to FIG. 3, 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. In the reset phase, 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 lower the source voltage value, the higher the brightness of the OLED, the higher the source voltage value, the OLED The lower the brightness.

In this embodiment, the V1 voltage is higher and the V2 voltage is lower. At the beginning of one frame, 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. To the next stage, 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. Repeat the above process, after 1 frame is completed, the complete checkerboard screen as shown in Figure 4 can be displayed.

In order to enable different source signals to be input to the first pixel unit group and the second pixel unit group, respectively, the source signals input to the first pixel unit group and the second pixel unit group can be controlled, in one embodiment, such as As shown in FIG. 5, 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.

For example, 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.

In order to implement the test of the color picture of the display panel, in one embodiment, referring again to FIG. 5, 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.

In this embodiment, 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. a green pixel unit and a plurality of columns of blue pixel units, and the red pixel unit, the green pixel unit and the blue pixel unit are arranged adjacent to each other in sequence, that is, one column of red pixel units is adjacent to one column of green pixel units and one column of blue pixel units, and multiple columns of red 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. For example, 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. Inputting a source signal to each column of green pixel units, 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.

In order to achieve illumination control for each pixel unit of the first pixel unit group and the second pixel unit group, in one embodiment, 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. For example, 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.

For example, 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 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.

For example, 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, for example, 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.

In the above embodiment, 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.

In order to realize the source signal lines of the respective colors, 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.

In this embodiment, by controlling a plurality of switch circuits of the first switch circuit group and the plurality of switch circuits of the second switch circuit group to be turned on and off, 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. For example, in the first timing, 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. a signal, at this time, 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. At this time, 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 following is a specific embodiment:

In this embodiment, as shown in FIG. 5, 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. In FIG. 5, AA is a display area of the display panel, and 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. Before each row is given a scan signal, 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. During the scanning phase, the first transistor T1 of the pixel circuit is turned on, and the data voltage is written to the pixel capacitor C.

In Fig. 8, 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. Repeat the above process, after the completion of 1 frame, you can display the complete checkerboard screen. Since RGB is separately controlled, the CIE (Commission Internationale de L'Eclairage, International Commission on Illumination) chromaticity can also be fine-tuned to make the test effect better.

In addition, 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.

Afterimage detection process:

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.

In one embodiment, a test circuit for an organic light emitting display panel is provided, 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.

In order to realize input of a signal, for example, 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. It is worth mentioning that 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. For example, the test signal includes a scan signal and a source signal. For example, 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. For example, the signal input module is further configured to provide a power source. For example, the signal input module is further configured to provide a first power source ELVDD and a second power source ELVSS. For example, 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 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.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-mentioned embodiments are merely illustrative of several embodiments of the present application, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the claims. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the present application. Therefore, the scope of the invention should be determined by the appended claims.

Claims

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 OLED display test apparatus according to claim 1, wherein the at least one source signal line comprises a first source signal line and a second source signal line, and the first source signal line is connected to each of the first pixel unit groups The second source signal line is connected to each of the second pixel unit groups, and the first source signal line is configured to input a first signal to each of the first pixel unit groups at a first timing, in a second timing And inputting a second signal to each of the first pixel unit groups, wherein 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 to each of the second timings The second pixel unit group inputs the first signal.
The organic light emitting display test device according to claim 1, further comprising a plurality of switch circuits, each of the switch circuits respectively having a switch tube, wherein the control end of each of the switch tubes is configured to receive a turn-on signal, the at least one The 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 switching circuits.
The organic light emitting display test apparatus according to claim 3, wherein each of said switching circuits includes a plurality of first switching circuit groups and a plurality of second switching circuit groups, each of said first switching circuit groups and said first one a pixel unit group is connected, each of the second switch circuit groups is connected to a second pixel unit group, and the at least one source signal line passes through each of the first switch circuit group and each of the first pixel unit groups Connecting, the 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 and be turned on, Each of the second set of switches is configured to be turned on by receiving an on signal at a second timing.
The OLED display test apparatus according to claim 4, wherein each of the pixel units comprises 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 arranged in a plurality of columns, each of the plurality of pixels The green pixel unit is arranged in a plurality of columns, each of the blue pixel units is arranged in a plurality of columns, and the at least one source signal line comprises a red light source signal line, a green light source signal line and a blue light source signal line, and the red light source signal line and Each of the red pixel units 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.
The organic light emitting display test device according to claim 5, wherein each of the red pixel cells is disposed adjacent to a column of the green pixel cells and a column of the blue pixel cells.
The OLED display test apparatus according to claim 6, wherein each of the first pixel unit groups comprises 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 comprising A red pixel unit, a plurality of columns of green pixel units, and a plurality of columns of blue pixel units.
The organic light emitting display test apparatus according to claim 1, further comprising a plurality of scan lines, each of said scan lines being connected to a row of said pixel units.
The OLED display test apparatus according to claim 8, wherein the time length of the first timing is an integer multiple of an output time of the scan line to a scan signal of the row of the pixel unit, and the time of the second timing The length is an integer multiple of the output time of the scan signal of the scan line to the pixel unit of the 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;

Further comprising a plurality of switch circuits, 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;

Also including a plurality of scan lines, 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 test circuit of the organic light emitting display panel according to claim 11, wherein the at least one source signal line comprises a first source signal line and a second source signal line, the first source signal line and each of the first pixel units Connected, the second source signal line is connected to each of the second pixel unit groups, and the first source signal line is set to input a first signal to each of the first pixel unit groups at a first timing, a second timing inputting a second signal to each of the first pixel unit groups, wherein 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 to each of the second timing units The second pixel unit group inputs the first signal.
The test circuit of the organic light emitting display panel according to claim 11, further comprising a plurality of switch circuits, each of the switch circuits respectively having a switch tube, wherein the control end of each of the switch tubes is configured to receive a turn-on signal, 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 switching circuits.
The test circuit of the organic light emitting display panel according to claim 13, wherein each of the switch circuits comprises a plurality of first switch circuit groups and a plurality of second switch circuit groups, each of the first switch circuit groups and one of a first pixel unit group is connected, each of the second switch circuit groups is connected to a second pixel unit group, and the at least one source signal line passes through each of the first switch circuit groups and each of the first pixels The unit group is connected, the 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 a conduction signal at a first timing. Each of the second group of switches is configured to be turned on by receiving an on signal at the second timing.
The test circuit of an organic light emitting display panel according to claim 11, further comprising a plurality of scan lines, each of said scan lines being connected to a row of said pixel units.
The test circuit of the organic light emitting display panel according to claim 15, wherein 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, the second timing The length of time is an integer multiple of the output time of the scan signal of the scan line to the pixel unit of the 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;

Further comprising a plurality of switch circuits, 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;

Also including a plurality of scan lines, 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.