Dehydration processing method of liquid crystal display

Abstract

The invention provides a dehydration processing method of a liquid crystal display. The dehydration processing method of the liquid crystal display comprises the following steps that (1) liquid crystal is guided into a closed container, drying agents are arranged in the closed container, moisture in the liquid crystal is absorbed through the drying agents, and the water content in the liquid crystal is controlled to be under 25 ppm; (2) the dried liquid crystal is guided into a filter to carry out filtering to remove foreign matters with a large diameter; (3) defoaming processing is carried out on the filtered liquid crystal under a vacuum condition; (4) the liquid crystal after the defoaming processing is put into a liquid crystal instilling device and is poured into a substrate through a liquid crystal instillation process (ODF). Due to the fact that the liquid crystal and the drying agents make contact directly, the moisture contained in the liquid crystal can be absorbed quickly, compared with an existing dehydration process, the moisture in the liquid crystal can be absorbed more efficiently in the direct contacting mode, efficiency of dehydration is improved, manufactured liquid crystal displayers are made to have a stable Gamma value by controlling the water content in the liquid crystal, and difference between gray scale transition and normal display is reduced.

Description

technical field [0001] The invention relates to a dehydration treatment method in which liquid crystal is in direct contact with a desiccant. Background technique [0002] As consumers have higher and higher requirements for the image quality of LCD screens, various manufacturers are constantly looking for solutions to improve image quality. The factors that affect the picture quality of LCD screens are: Gamma value, color number, contrast, brightness and response speed, etc. Among them, the Gamma value comes from the response curve of the CRT, which is a parameter reflecting the nonlinear relationship between the image brightness of the picture tube and the signal voltage input to the electron gun. [0003] For CRT monitors, the electron beam emitted by the kinescope electron gun and the brightness of the image it generates do not change linearly with the input voltage of the kinescope. Compared with the input voltage, the electron current changes according to an exponenti...

AI Technical Summary

Problems solved by technology

[0006] However, in the production process of the existing liquid crystal display screen, after the liquid crystal screen is opened, it will continuously absorb water from the surrounding environment, and in the defoaming process, only half of the gas dissolved in the liquid crystal will be removed, while the water Poor ability to remove

Moisture remaining in the liquid crystal will not only crack the liquid crystal and reduce the life of the liquid crystal display, but also cause the change of the dielectric constant of the liquid crystal, thereby affecting its voltage VS transmittance curve. Generally, after the liquid crystal is selected, for a specific When the box is thick, this curve is basically fixed