Reflective liquid crystal dispaly device having cholesteric liquid crystal color filter and method of manufacturing the same

Abstract

A reflective liquid crystal display device of the present invention includes: first and second substrates spaced apart from each other, the first and second substrates having sub-pixels; a liquid crystal layer interposed between the first and second substrates; a switching element and a pixel electrode on a rear surface of the second substrate, wherein the switching element and the pixel electrode are formed within a sub-pixel and electrically connected to each other; a retardation film and a polarizer formed in series on a front surface of the second substrate; a double-layered CCF on a front surface of the first substrate, the double-layered CCF including red, green and blue CLC color films in the sub-pixels that respectively reflect wavelengths of red, green and blue colored light so that the sub-pixels produce red, green and blue colors, respectively; and a common electrode on the double-layered CCF layer; wherein the double-layered CCF layer includes a first and second CLC layers, a first alignment layer between the first CLC layer and the first substrate, and a second alignment layer between the first and second CLC layers; wherein a surface of the first CLC layer on which the second alignment layer is formed is surface-reformed; and wherein the first CLC layer reflects first wavelength bands of the light and the second CLC layer reflects second wavelength bands of the light.

Description

[0001] This application claims the benefit of Korean Patent Application No. 2002-0048100 filed on Aug. 14, 2002, which is hereby incorporated by reference in its entirety. technical field [0002] The invention relates to a liquid crystal display device, in particular to a reflective liquid crystal display device using a cholesteric liquid crystal color filter layer. Background technique [0003] The liquid crystal display device has the characteristics of being thin, easy to carry, light in weight and low in power consumption. Liquid crystal display equipment is a technology-intensive and high value-added product, and it is a new generation of display equipment. [0004] Among the various types of liquid crystal display devices commonly used, active matrix liquid crystal display (AM-LCD) devices have been greatly developed due to their high resolution and good display of moving images. Among them, thin film transistors (TFTs) and pixel electrodes connected to the TFTs are ...

AI Technical Summary

Problems solved by technology

However, as the birefringence increases, the manufacturing cost also increases, so it is difficult to develop a cholesteric liquid crystal material with a large birefringence

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