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Test method and test device for touch screen

A technology of touch screen and test method, applied in static indicator, error detection/correction, input/output process of data processing, etc.

Inactive Publication Date: 2020-11-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of the Touch line, it interferes with the visibility of the inspectors for routine defects such as dots, lines, and stains, resulting in some defective products not being detected

Method used

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  • Test method and test device for touch screen
  • Test method and test device for touch screen
  • Test method and test device for touch screen

Examples

Experimental program
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Effect test

Embodiment 1

[0049] In the testing method of the touch display screen provided in Embodiment 1 of the present invention, for a touch display screen, at least one full detection cycle is included in the electrical performance testing process of the touch screen forming stage; in one full detection cycle, The waveform output from the digital signal source to each pin of the gate drive circuit of the touch screen is as follows: Figure 3b shown. Specifically, the detection method flow in a full detection cycle is as follows: Figure 4 shown, including the following steps:

[0050] S401: In the first detection stage in the full detection cycle, a DC signal is provided to the gate drive circuit of the touch screen to simultaneously open all gates of the screen, so as to detect conventional display defects of the touch screen.

[0051] In this step, in the first detection stage of the full detection cycle, the digital signal source is controlled to output a DC signal to the gate drive circuit ...

Embodiment 2

[0075] In the testing method of the touch screen provided in Embodiment 2 of the present invention, for one touch screen, the electrical performance testing process of the touch screen forming stage may include a plurality of sub-test cycles; The colors of the display screens are not the same. Specifically, the electrical performance testing process may include at least one full testing cycle, and one full testing cycle includes multiple sub-testing cycles, and the colors of the screens displayed on the touch screen in each sub-testing cycle in a full testing cycle are different.

[0076] For example, a full detection cycle in the electrical performance detection process can include 7 sub-test cycles; the touch screen can display black screen, dark gray screen, light gray screen, white screen color, red screen, Blue screen, and green screen.

[0077] The detection method flow in a sub-detection cycle is as follows: Figure 6 As shown, the following steps may be included:

...

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Abstract

A touch display screen testing method and a touch display screen testing device are provided. The method includes: applying a direct current signal to a gate driving circuit of the touch display screen to turn on gate electrodes of the touch display screen simultaneously, to detect a display defect of the touch display screen, in a first testing stage of an electric performance testing process at a Cell stage of a touch display screen.

Description

technical field [0001] The invention relates to the technical field of liquid crystal touch screens, in particular to a test method and a test device for a touch screen. Background technique [0002] TFT-LCD (Liquid Crystal Display-Thin Film Transistor, liquid crystal display-thin film crystal) is an optoelectronic product that integrates large-scale semiconductor integrated circuit technology and flat-panel light source technology with liquid crystal as the medium and thin-film transistor as the control element. With the development of the touch panel function of portable products, the research on the integration of the touch panel function and the liquid crystal panel is becoming more and more popular. The integration of the original external touch panel components and the liquid crystal panel can further realize the thinning and lightening of the panel . [0003] IN-CELL technology refers to the method of embedding touch panel functions into liquid crystal pixels. At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00
CPCG09G3/006G06F3/0412G06F11/2221G09G3/20G09G2300/0408G06F2203/04103
Inventor 王阔海孙亮徐洪亮郭立勇苗立彬樊振宁
Owner BOE TECH GRP CO LTD
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