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Test method for display panel and its goa circuit

A technology of display panel and testing method, which is applied to static indicators, instruments, etc., and can solve the problems of inability to accurately simulate the stress of TFT in GOA circuits, TFT threshold voltage offset, etc.

Active Publication Date: 2021-07-06
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the thin film transistor (ThinFilm Transistor, TFT) in the pull-down maintenance unit will be subjected to forward current stress (stress) for a long time, the threshold voltage (Vth) of the TFT will shift seriously
Although each TFT in the pull-down holding unit can be placed with a corresponding test unit (testkey), the TFTs in the GOA circuit are usually connected to an AC signal (Alternate Current, AC), and the stresses on each TFT are different. The current electrical measurement machine cannot accurately simulate the stress of the TFT in the GOA circuit, and it is very necessary to reasonably measure the electrical properties of the TFT in the inverter

Method used

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  • Test method for display panel and its goa circuit
  • Test method for display panel and its goa circuit
  • Test method for display panel and its goa circuit

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Embodiment Construction

[0034]The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0035] In the present application, the electrical properties of the switch unit in the inverter are tested by correspondingly setting a test unit at a position where no reset unit is provided in the GOA circuit unit.

[0036] The present application provides a display panel, the display panel includes a GOA circuit and at least one test unit, the GOA circuit includes N cascaded GOA circuit units, each GOA circuit unit includes a pull-down maintenance unit and a first node,

[003...

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Abstract

The present application provides a test method for a display panel and its GOA circuit. The electrical properties of the switch unit in the inverter are tested by correspondingly setting a test unit at a position where no reset unit is provided in the GOA circuit unit.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a display panel and a method for testing a GOA circuit thereof. Background technique [0002] Gate Driver On Array (GOA), referred to as GOA, is to use the array (Array) process in the existing thin-film transistor liquid crystal display to manufacture the gate (Gate) row scanning drive signal circuit on the array substrate to realize the gate Extremely progressive scanning drive mode. [0003] At present, because GOA technology can save the gate drive chip (Gate Integrated Circuit) and realize the advantages of narrow border (Narrow Border), it has been widely used in panel design, and the GOA circuit is continuously optimized to make the performance of the GOA circuit more stable. especially necessary. [0004] Such as figure 1 As shown, it is a schematic diagram of the ninth stage and subsequent gate drive circuit units of a common 8-clock signal gate drive circu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/00
CPCG09G3/006G09G3/3677
Inventor 奚苏萍
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD