Lighting components and UV liquid crystal irradiation machine

Abstract

An illumination assembly (100) for an alignment process using ultraviolet light, relating to the field of LCD display manufacturing, and used for controlling the duration of irradiation of a substrate (300) by a lamp (200) in an ultraviolet irradiation machine. The illumination assembly (100) comprises a light blocking plate (10). At least one end of the light blocking plate (10) is connected to a driving device (20). When multiple light blocking plates (10) are present, each light blocking plate (10) is provided with an independent axis (11). The lamp (200) is turned on or off by rotation of the plates around the lamp (200). The rotation has a first position and a second position. The invention ensures that each area of the substrate (300) is exposed to ultraviolet irradiation for the same duration of time, thereby achieving uniform irradiation, and causing the liquid crystal to have the same pre-tilt angle.

Description

technical field [0001] The invention relates to the field of liquid crystal display manufacture, in particular to an ultraviolet light alignment process. Background technique [0002] The ultraviolet light alignment process is a technology in the cell-to-cell manufacturing process of LCD displays. By irradiating ultraviolet light to the substrate, the reactive monomers in the liquid crystal react, so that the liquid crystal forms a pre-tilt angle. The size of the pretilt angle and the exposure time are in direct proportion. The longer the time, the larger the pretilt angle. Lighting time needs to be strictly controlled. [0003] The UV alignment process needs to use a UV liquid crystal irradiation machine to emit ultraviolet light. At present, metal halide lamps, mercury lamps and fluorescent lamps are commonly used. In actual production, these lamps use the shape of lamp tubes arranged side by side to irradiate the substrate, and the time for each substrate to be irradiat...

AI Technical Summary

Problems solved by technology

The moving time of the shading plate of the existing G8.5 generation production line is about 5s. Combining the two actions of opening and closing, the central point takes about 10s more irradiation time than the two side edges, which leads to the existence of pre-tilt angles between the two side edges and the center point. Inconsistencies, which affect the optical performance of LCDs and reduce product yield

When the production line is of a higher generation, such as the G10.5 generation production line, due to the larger size of the substrate, it takes longer for the light shield to move from the middle of the machine to both sides, and the difference in pre-tilt angle at each position of the substrate will be further enlarged, resulting in lower yield.

Images