Transverse electric field liquid crystal display device picture element, and its substrate and picture element process

Abstract

This invention discloses the pels and motherboard of a kind of transverse electric field liquid crystal display and the pels technics. Its reflecting board has nanometer rank rough surface to diffuse lamp-house and increase the contrast. Besides, because the rough surface is nanometer rank, it will have bigger disheveled angle and planar effect in the aspect of disheveled effect. That is the reflectivity won't acutely change with the visual angle, and has good resist glaring effect. Furthermore the rough surface are formed by using the crystal and the characteristic of the material itself, and don't need additive light sheltering modulus.

Description

technical field [0001] The invention relates to a transverse electric field liquid crystal display, in particular to a pixel and a process of a transverse electric field liquid crystal display with a nanoscale rough surface reflector. Background technique [0002] In the prior art, a liquid crystal display (LCD) uses a TN mode and an STN mode. However, the LCDs of the TN mode and the STN mode have the disadvantage of a narrow viewing angle. Therefore, a transverse electric field (in -plane switching; IPS) LCD, in addition to having a wide viewing angle, the IPS mode LCD also has the advantages of no compensation film and fast response time, and its process has one less photomask than the TN mode LCD. However, the IPS mode LCD The pixel electrode (pixel electrode) and the common electrode (counter electrode) are made of opaque metal and have a smooth surface, so the reflection is specular reflection, thus reducing the contrast. Although, the pixel electrode and the common ele...

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Problems solved by technology

[0002] In the prior art, a liquid crystal display (LCD) uses a TN mode and an STN mode. However, the LCDs of the TN mode and the STN mode have the disadvantage of a narrow viewing angle. Therefore, a transverse electric field (in -plane switching; IPS) LCD, in addition to having a wide viewing angle, the IPS mode LCD also has the advantages of no compensation film and fast response time, and its process has one less photomask than the TN mode LCD. However, the IPS mode LCD The pixel electrode (pixel electrode) and the common electrode (counter electrode) are made of opaque metal and have a smooth surface, so the reflection is specular reflection, thus reducing the contrast. Although, the pixel electrode and the common electrode can be A rough surface made of organic material, such as resin, is formed below to improve this shortcoming. However, increasing the organic material requires more photomasks, which increases the complexity and cost of the process, and the organic material The heat resistance is not good, about 250 degrees. In addition, because the height difference of the rough surface is too large, between 0.5um and 1.5um, the gap of the liquid crystal display changes too much, which reduces the efficiency of reflected light. The ideal 100% drops to between 60% and 85%

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