Control method used for reducing rainbow occurrence in LCD production process

Abstract

The invention relates to a control method used for reducing rainbow occurrence in the STN LCD production process. The invention aims at providing a control method used for reducing the rainbow occurrance in the LCD production process.The working process comprises a designing stage, a PI printing stage, a friction dry-clean stage, a pad silk-screen stage, a pad material spraying stage, a fitting stage, a pressing fit and leveling stage, a relief block ultrasonic cleaning stage and a mating baking stage. The optimization selection is conducted by the compensation design, the silk-screen materialselection, the spray pad material uniformity control, and the mating baking process. According to the glass-resistance, the compensation design is conducted to an LCD box frame. The glass substrate with the perpendicularity of not greater than 0.1% is chosen. The spray pad material uniformity is controlled to be less than 5/mm<2> of the two spacers groups. When the mating roast is conducted, thedefuelling preload is increased. By adopting the control method of the invention, the LCD yield can be improved, and the product quality is stable.

Description

technical field [0001] The invention relates to a liquid crystal display production process, in particular to a control method for reducing the occurrence of rainbows in the production process of an STN liquid crystal display. Background technique [0002] Liquid Crystal Display (LCD: Liquid Crystal Display) is a display made by converting the liquid crystal's changes in boundary conditions such as electric field, magnetic field, light, and temperature into visual signals under certain conditions by using various electro-optic effects of liquid crystals. Liquid crystal was first used in the manufacture of displays by American RCA Company in May 1968, and has been widely used in clocks, calculators, instrumentation, notebook computers, mobile phones, pagers, electronic pets, pocket color TVs, and large flat panel displays. , projection TV and other household, industrial and military display fields. [0003] Today, information display technology is becoming more and more impo...

AI Technical Summary

Problems solved by technology

However, with the wide application of liquid crystal displays, people can also find some disadvantages: for example, because it is a passive component, it does not emit light by itself, and it needs other light sources to have visibility in dark places and has a limited viewing angle, etc.

However, the rainbow phenomenon is a fatal flaw of LCDs, a bottleneck in the entire LCD manufacturing process, and a major factor affecting LCD yield and quality.

If the rainbow phenomenon is not properly controlled, it will not only cause waste of materials, but also greatly hinder the improvement of the entire LCD technology level.

Most of the rainbow phenomenon is manifested as the color difference of the LCD screen, which affects the display screen

The reasons include the uneven thickness of the STN-LCD cell, the improper structure of the STN-LCD cell, the compensation design is not suitable, the accuracy of the pressing method is sufficient, and the environmental factors in the STN-LCD process will affect the LCD. occurrence of rainbow phenomenon

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