Detection method of display panel, and detection device

A display panel and detection method technology, applied in the direction of static indicators, instruments, electrical components, etc., can solve the problems of different currents, display defects, and reduce the uniformity of display panel display brightness, so as to improve detection efficiency and increase mass production. Effect

Active Publication Date: 2017-07-04
BOE TECH GRP CO LTD
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Problems solved by technology

When displaying, the magnitude of the current supplied to the light emitting diode will be affected by the threshold value of the driving thin film transistor connected to the light emitting diode, and due to the differences in the threshold voltage and mobility of the driving thin film transistor in different pixel units, different pixel units provide The current to the LEDs is different, which reduces the uniformity of the display brightness of the display panel and produces display defects, such as spots or patterns in areas that appear

Method used

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  • Detection method of display panel, and detection device
  • Detection method of display panel, and detection device
  • Detection method of display panel, and detection device

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Experimental program
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specific Embodiment approach

[0065] As a specific implementation manner, step S12 may specifically include:

[0066] S121a. Calculate the actual difference between the actual value of the electrical signal corresponding to each pixel unit and the standard value;

[0067] S121b. Comparing the actual difference corresponding to each pixel unit with the predetermined value, when the actual difference is greater than the predetermined value, it is determined that the corresponding pixel unit is a defective pixel unit, and according to various preset defect types and respective The corresponding preset difference range determines the defect type of each defective pixel unit. As mentioned above, if the pixel unit is normal, the value of the electrical signal of the first electrode of the driving transistor T2 in the pixel unit is constant; There will be an obvious difference between the actual value of the signal and the standard value, and the magnitude of the difference is different for different defect type...

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Abstract

The invention provides a detection method of a display panel. The display panel comprises a plurality of pixel units; each pixel unit comprises a light-emitting diode (LED) and a pixel circuit, wherein the pixel circuit comprises a drive transistor; a first pole of each drive transistor is connected with the corresponding LED. The detection method comprises the steps of when the display panel reaches target brightness, detecting actual values of electrical signals of the first poles of the drive transistors in all the pixel units, wherein each electrical signal comprises a current signal and / or a voltage signal; judging whether all the pixel units have defects or not according to the actual values of the electrical signals corresponding to all the pixel units. Correspondingly, the invention also provides a detection device. The detection method and the detection device can help an operator to rapidly judge whether the pixel units have defects or not.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a detection method and a detection device of a display panel. Background technique [0002] Organic light-emitting diodes (Organic Light-Emitting Device, OLED) have the advantages of active light emission, good temperature characteristics, low power consumption, fast response, wide viewing angle, ultra-thin and low cost, and have been widely used in display devices. In an organic electroluminescent display panel, each pixel unit is provided with a light emitting diode and a pixel driving circuit for driving the light emitting diode. When displaying, the magnitude of the current supplied to the light emitting diode will be affected by the threshold value of the driving thin film transistor connected to the light emitting diode, and due to the differences in the threshold voltage and mobility of the driving thin film transistor in different pixel units, different pixel units provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
CPCG09G3/006G09G3/32G09G2320/0295H10K59/123H10K59/131
Inventor 朱明毅
Owner BOE TECH GRP CO LTD
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