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Liquid crystal cell detection device, method, and display panel preparation method

A detection method and detection device technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of low efficiency of liquid crystal cell thickness testing and easy missed detection, and achieve fast detection speed, short time consumption, and high scanning accuracy. Effect

Inactive Publication Date: 2016-11-09
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problems of low inspection efficiency and easy missed detection in the existing liquid crystal cell thickness test, and provides a liquid crystal cell detection device, detection method and preparation method of a display panel

Method used

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  • Liquid crystal cell detection device, method, and display panel preparation method
  • Liquid crystal cell detection device, method, and display panel preparation method
  • Liquid crystal cell detection device, method, and display panel preparation method

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Embodiment 1

[0030] This embodiment provides a method for detecting a liquid crystal cell, the liquid crystal cell includes a plurality of pixel units, and a first substrate and a second substrate oppositely arranged, the method is as follows figure 1 shown, including the following steps:

[0031] S01. Measuring the capacitance value between the first substrate and the second substrate of each pixel unit in the liquid crystal cell;

[0032] S02. Convert the capacitance value between the first substrate and the second substrate of each pixel unit into a distance value between the first substrate and the second substrate of the pixel unit;

[0033] S03. Comparing the distance value between the first substrate and the second substrate of each pixel unit with a threshold to determine whether the liquid crystal cell is abnormal.

[0034] In this embodiment, the capacitance value between the first substrate and the second substrate of each pixel unit is converted into the distance value between...

Embodiment 2

[0036] This embodiment provides a method for detecting a liquid crystal cell. The liquid crystal cell includes a plurality of pixel units, and an array substrate and a color filter substrate arranged oppositely. Pixel electrodes are provided on the array substrate of each pixel unit of the liquid crystal cell. , the color filter substrate of each pixel unit is provided with a common electrode, and a liquid crystal material is provided between the array substrate and the color filter substrate, and the method is as follows figure 2 shown, including the following steps:

[0037] S21. Applying the same voltage to the pixel electrode and the common electrode of each pixel unit to measure the capacitance between the pixel electrode and the common electrode of each pixel unit. Specifically, a test signal can be added to the input signal terminal of the lighting machine, the liquid crystal cell (or display panel) can be scanned row by row or column by row, and the same voltage can b...

Embodiment 3

[0047] This embodiment provides a detection device for a liquid crystal cell, such as Figure 4 shown, including:

[0048] Capacitance measurement module, for measuring the capacitance value between the first substrate and the second substrate of each pixel in the liquid crystal cell; data conversion module, for converting the capacitance value between the first substrate and the second substrate of each pixel The capacitance value is converted into the distance value between the first substrate and the second substrate of the pixel; the data comparison module is used to compare the distance value between the first substrate and the second substrate of each pixel with a threshold value to determine Whether the liquid crystal box is abnormal.

[0049] Preferably, the detection device of the liquid crystal cell also includes a data acquisition module for collecting the dielectric constant of the liquid crystal material between the first substrate and the second substrate of eac...

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Abstract

The invention provides a liquid crystal cell detection device, method, and a display panel preparation method, and belongs to the display technical field, so low detection efficiency and easy detection missing problems in existing liquid crystal cell thickness tests can be solved; in the novel detection method, a capacitance value between a first substrate and a second substrate of each pixel unit is converted into a distance value between the first and second substrates of the pixel unit, and the distance value is compared with a threshold value, thus determining whether the liquid crystal cell is abnormal or not; the cell thickness in all positions of the liquid crystal cell can be inspected one by one, and the detection method is fast in speed, short in time consumption, and high in scanning precision; the mode of comparing with the threshold value is employed, so the data can be directly read. The detection method can be carried out before Polaroid pasting or binding steps, so poor product cannot enter the next step. The detection method is suitable for detecting cell thickness of various liquid crystal cells.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a liquid crystal cell detection device, a detection method and a preparation method of a display panel. Background technique [0002] In recent years, with the wide application of display products, people's demand for the performance of liquid crystal display panels has been continuously improved. Various defects still inevitably appear in the production process, among which the dark dot defects (also known as Black-Gap defects) caused by the pressure of the liquid crystal display panel account for a considerable proportion in the production process. [0003] The inventors have found that there are at least the following problems in the prior art: Black-Gap defects in the prior art are tested by liquid crystal cell thickness testing equipment, which is based on the principles of optical refraction when light passes through the liquid crystal between the array substra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/1333
CPCG02F1/1309G02F1/1333
Inventor 冯兰侯清娜
Owner BOE TECH GRP CO LTD
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