Polyimide coating method of liquid crystal display panel

Abstract

A method for coating polyimide on a liquid crystal display panel, comprising the following steps: step 1, providing a plurality of nozzles (20) and a glass substrate (40); step 2, arranging the plurality of nozzles (20) close and flush in a row, and ensuring that the arrangement length of the nozzles (20) equals to the width of the glass substrate (40); step 3, vertically suspending the entire row of nozzles (20) above the glass substrate (40), the nozzles being disposed corresponding to the glass substrate (40) in the width direction of the glass substrate (40); step 4, simultaneously opening the plurality of nozzles (20) to enable each nozzle (20) to simultaneously, quickly, and uniformly drip polyimide liquid (60) at a preset flow rate while moving the glass substrate (40), such that the polyimide liquid (60) is uniformly coated on the glass substrate (40) to form a polyimide film (62); and step 5, smoothening the polyimide film (62) uniformly coated on the glass substrate (40) via a scraper (80), so that the surface of the polyimide film (62) on the glass substrate (40) is uniform and level. The method for coating polyimide on a liquid crystal display panel simplifies the coating processes and device, and reduces production time and coating cost, and improves the coating effect.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a polyimide coating method for a liquid crystal display panel. Background technique [0002] A liquid crystal display (LCD, Liquid Crystal Display) has many advantages such as a thin body, power saving, and no radiation, and has been widely used. Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates, and control the liquid crystal molecules to change direction through whether the glass substrates are energized or not, and refract the light from the backlight module to produce a picture. [0003] Usually, the liquid crystal display panel consists of a color filter substrate (CF, Color Filter), a thin film transistor su...

AI Technical Summary

Problems solved by technology

However, the existing polyimide coating device is relatively complicated, and the production time of coating polyimide is long, so both the coating device and the coating process need to be further improved

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