Display panel detection device and display panel detection method

A technology of a display panel and a detection device, which is applied to static indicators, instruments, etc., can solve the problems of abnormal timing, poor display panel, and difficulty in judging the display.

Active Publication Date: 2017-02-22
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, in the existing display manufacturing process, it is necessary to test the semi-finished liquid crystal cell cell, usually using a single-sided gate drive method, that is, a plurality of gate drive units 10 are crimped on one end of the gate line 1 of the display panel. (Gate drive IC), each gate drive unit 10 is used to apply a drive voltage signal to the gate drive output terminal 11 connected to the gate line 1 on it, but since the gate drive unit 10 and the gate line 1 adopt a crimped are connected together, so it is inevitable that there will be a pin miss (some gate lines 1 fail to connect with the corresponding pins on the gate drive unit 10), and at the same time, the gate line 1 that is lost by the pin miss The corresponding row of pixels cannot be displayed normally (a dark line appears)
[0004] However, the inventor found that if the method of unilateral gate driving is adopted for testing the display panel, the following problems still exist. For large-sized products, the method of unilateral gate driving is adopted to input The driving voltage signal leads to insufficient driving ability of the other end of the gate line 1 (the input side without the driving voltage signal), and the display effect is poor, which leads to mura (such as alignment film, color film, etc.) defects on the display panel. was detected
[0005] According to the above-mentioned principle, although a double-sided gate driving method is adopted for a large-sized display panel, that is, both ends of the gate line 1 on the display panel are pressed against the gate drive unit 10, if a gate drive unit in the gate drive unit When a pin miss occurs between the output terminal 11 and one end of a gate line 1 (only the gate line 1 is not connected to the corresponding pin on the gate drive unit 10), the gate line 1 is driven by the gate from the other end. The gate drive signal provided by the unit 10 drives to light up the pixel corresponding to the gate line 1, but it is not difficult to find that even if the pixel corresponding to the gate line 1 is lighted up, its brightness is still different from that of pixels in other rows Therefore, it is difficult to judge whether the display defect is caused by the mura on the display panel (such as alignment film, color film, etc.) or the grid line 1 is caused by pin miss
Or, one end of a certain gate line 1 is pin miss, and one end of the next gate line 1 adjacent to the gate line 1 is connected to the pin on the gate driving unit 10 corresponding to the gate line 1 Specifically, when the right end of the first gate line 1 is pin miss, the right end of the second gate line 1 is connected to the pin corresponding to the first gate line 1 on the gate drive unit 10, and each When the gate drive unit 10 connected to the left end of the gate line 1 does not have a pin miss, it will result in scanning on the left side of the first gate line 1 while scanning on the right side of the second gate line 1, Therefore, the timing of the display panel will be abnormal, resulting in poor display

Method used

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  • Display panel detection device and display panel detection method
  • Display panel detection device and display panel detection method
  • Display panel detection device and display panel detection method

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Embodiment 1

[0037] Such as figure 2 As shown, this embodiment provides a display panel detection device, including at least one gate drive unit 10, a detection unit 30 and at least one auxiliary gate drive unit 20; each gate drive unit 10 has a plurality of gate drive signals Output, each gate drive signal output terminal 11 corresponds to a gate line 1; each of the auxiliary gate drive unit 20 has a plurality of auxiliary gate drive signal output terminals 21, and each of the auxiliary gate drive signal output The end 21 corresponds to a gate line 1; the gate drive unit 10 is used to apply a gate drive signal to the first end 1-1 of the gate line 1 through the gate drive signal output terminal 11 thereon; the detection unit 30, used to detect whether each gate line 1 is applied with a gate drive signal, and the change of the gate drive signal; the auxiliary gate drive unit 20 is used to detect a certain gate line 1 in the detection unit 30 A gate drive signal is applied to it, and when...

Embodiment 2

[0046] This embodiment provides a detection method for a display panel, which is characterized in that it includes: detecting whether the first end 1-1 of each gate line 1 on the display panel is applied with a gate drive signal, and when a certain gate line 1 is detected A gate driving signal is applied to the line 1, and when the gate driving signal changes to a preset value, applying an auxiliary gate driving signal to the second end 1-2 of the gate line 1.

[0047] Through the detection method of the display panel of this embodiment, the gate drive unit 10 can be used to apply a gate drive signal to the first end 1-1 of the gate line 1 in the display panel, and at this time, which one can be detected by the detection unit 30 The gate line 1 is applied with a gate drive signal, and the change of the gate drive signal is determined. When the gate drive signal changes to a preset value, the auxiliary gate drive unit 20 is controlled to work as an auxiliary gate line 1. Gate d...

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Abstract

The invention provides a display panel detection device and method and belongs to the technical field of display device detection. The display panel detection device and method can solve the problem that defects of existing display panels can not be detected easily due to the fact that the existing display panels are insufficient in driving capability and poor in display. The display panel detection device comprises at least one gate drive unit, a detection unit and at least one auxiliary gate drive unit. Each gate drive unit is provided with a plurality of gate drive signal output ends. Each gate drive signal output end corresponds to one gate line. The gate drive units apply gate drive signals to the first ends of the corresponding gate lines through the gate drive signal output ends of the gate drive units. Each auxiliary gate drive unit is provided with a plurality of auxiliary gate drive signal output ends. Each auxiliary gate drive signal output end corresponds to one gate line. The display panel detection device is particularly suitable for detecting large display panels.

Description

technical field [0001] The invention belongs to the technical field of display device detection, and in particular relates to a display panel detection device and a display panel detection method. Background technique [0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD) is a common liquid crystal display product at present. In TFT-LCD, each pixel has a thin film transistor, and the thin film transistor of each pixel needs to be connected with the corresponding The gate drive circuit (that is, the shift register unit) is connected to control the change of the transmittance of the liquid crystal in the pixel to achieve the purpose of controlling the color change of the pixel. Array substrate row drive (GateDriver on Array, GOA) circuit technology is a gate drive circuit technology commonly used in the field of TFT-LCD technology. The GOA circuit is realized by multiple cascaded shift register units. The driving circuit is directly fabricated on the array substrate i...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G09G3/00G09G3/36
Inventor董殿正
OwnerBOE TECH GRP CO LTD