Sealing process of smectic liquid crystal display

Abstract

The invention discloses a technology of sealing a smectic phase liquid crystal displayer. The technology comprises the steps that a plurality of smectic phase liquid crystal displayers to be sealed are stacked on a sealing device, and residual smectic phase liquid crystal at a filling port is wiped off; action pressure larger than balance pressure is exerted for set time; the action pressure is fast and gradually reduced to the balance pressure time after time; the extruded smectic phase liquid crystal at the filling port is wiped off, and the filling port is sealed through a sealing compound; the balance pressure is reduced to glue-permeating pressure and the glue-permeating pressure is kept for set time; the sealing compound is solidified, and sealing is finished. A multi-section type pressing method is adopted in the sealing technology, the defect that the viscosity of the smetic phase liquid crystal is too large is overcome, the time of the sealing operation is shortened, for example, the sealing time of a 2.8-cun screen is shortened to 20 minutes from the original time of 120 minutes, the leakproofness of the seal is good, the production efficiency of the smectic phase liquid crystal displayer is improved, and mass production of the smectic phase liquid crystal displayer can be achieved.

Description

technical field [0001] The invention relates to a liquid crystal display sealing process, in particular to a sealing process in the production process of a smectic phase liquid crystal display. Background technique [0002] In the manufacturing process of liquid crystal displays, there is a very important process step, that is, the flattening and sealing process, referred to as the sealing process for short. [0003] The liquid crystal display has two upper and lower substrates respectively etched with corresponding conductive electrodes. The upper and lower substrates are sealed and connected parallel to each other at a certain distance. There is only one filling port for injecting liquid crystal into the gap between the two substrates. In the gap between the two substrates, spacers of uniform size are evenly distributed, and the spacers are made of soft transparent material, and are used to keep the distance between the two substrates constant. [0004] In the process of ...

AI Technical Summary

Problems solved by technology

[0013] Although this existing sealing method can achieve the sealing effect, because the smectic liquid crystal has a high viscosity and poor fluidity at room temperature, it will take a long time to squeeze out the excess smectic liquid crystal only by the balance pressure. For a long time, even for a small-sized smectic liquid crystal display (such as a 2.8-inch screen), the required pressurization time is longer, at least 2 hours or more, and the process efficiency is low. If the size increases, the required pressurization time will increase exponentially. For screens larger than 10 inches, it is almost impossible to complete the sealing operation.

Images