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

A liquid crystal display and reflective technology, applied in instruments, optical filters, optics, etc., can solve problems such as rising manufacturing costs and difficulty in developing cholesteric liquid crystal materials

Inactive Publication Date: 2004-03-17
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0039] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the invention shown in the accompanying drawings will now be described in detail.

[0040] image 3 Shown is the relative visibility curve for the human eye. exist image 3 In the graph shown, it can be confirmed that the human eye can see light in the wavelength range of 400 nm to 700 nm. In particular, by image 3 It can be seen that the visibility of the human eye has the highest value in the range of 500nm to 600nm. Therefore, in the present invention, the wavelength of the color is in the wavelength range of 500-600 nm closest to the highest value of visibility.

[0041] Figure 4 Shown is a schematic cross-sectional view of a reflective liquid crystal display (LCD) device having a CCF (cholesteric liquid crystal color filter) according to the present invention.

[0042] As shown, the reflective LCD device of the present invention includes first and second substrates 110 and 130, and a li...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02F1/1335
CPCG02F1/133536G02F2001/133521G02F1/133514G02F2001/133543G02F1/133521G02F1/133543G02F1/1335
Inventor 尹性会黄喜男
Owner LG DISPLAY CO LTD
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