Friction device

Abstract

The invention provides a friction device. The friction device comprises a friction roller and a friction base platform. The friction base platform is used for bearing a substrate to be rubbed. The friction roller is provided with friction cloth. The friction roller is arranged above the friction base platform and used for rubbing the substrate to be rubbed. The friction device further comprises a pre-friction substrate. The friction roller can move relative to the pre-friction substrate along the surface of the pre-friction substrate. The pre-friction substrate can move towards the friction base platform or far away from the friction base platform. Compared with the prior art, the friction device can shorten the pre-friction time, improve production efficiency and reduce the workload of operators.

Description

technical field [0001] The invention relates to the manufacturing field of liquid crystal display devices, in particular to a rubbing device. Background technique [0002] In the manufacturing process of liquid crystal display panels, the rubbing process plays an important role, and the quality of the rubbing effect is directly related to the quality of the display panel. Rubbing process, that is, using a rubbing roller equipped with rubbing cloth to rub the polyimide (PI) film on the surface of the substrate, so that the surface of the PI film forms grooves with a certain pre-tilt angle that are uniformly arranged, ensuring that the liquid crystal molecules are evenly distributed along the grooves. arrangement. The hair direction and uniformity of the friction cloth on the surface of the friction roller directly determine the friction effect, that is, the effect of the PI film groove after friction. [0003] However, some debris will inevitably be generated during the rub...

AI Technical Summary

Problems solved by technology

[0004] First, it takes a long time and the efficiency is low; for example, under normal circumstances, 40 pre-rubbing substrates (usually glass substrates) are pre-rubbed, and it takes about 2 minutes to pre-rub a piece of pre-rubbed substrate, then the entire pre-rubbing is completed. The process takes about 80 minutes. The time of pre-rubbing plus the time of handling the pre-rubbing substrate makes the whole process take longer, which affects the subsequent rubbing process and reduces production efficiency;

[0005] Second, the number of pre-friction substrates occupied is large, and the number of fixed parts occupied is large, resulting in a large waste of production line resources;

[0006] Third, the surface conditions of different pre-rubbing substrates are different, and the impact on the cloth is different when rubbing, which affects the hair direction and uniformity of the rubbing cloth, thereby affecting the friction effect and product quality;

[0007] Fourth, the manual handling of fixing parts and pre-friction substrates reduces production efficiency and easily causes production accidents

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