Reflective liquid crystal display device
AssigneeLG.Philips LCD Co., Ltd.
InventorSunghoe Yoon
Life of this patent
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Abstract
A reflective LCD device having a CLC color filter includes a holographic film to increase a luminance and viewing angle. Due to the holographic film, light incident to the CLC film has not only a small incident angle but also a small reflection angle. Therefore, a wavelength variation decreases. Further, since the holographic film diffuses the reflected light, a chromaticity variation also decreases. Since the reflective LCD device of the present invention further includes the diffusion film on the holographic film, the incident light can have a wide range of incident angle and the reflected light can be further diffused.
Claims26
A reflective cholesteric liquid crystal (CLC) display device, comprising:
- a first substrate;
- an absorption layer on the first substrate;
- a cholesteric liquid crystal (CLC) color filter over the absorption layer;
- a first electrode on the cholesteric liquid crystal (CLC) color filter;
- a second substrate spaced apart from the first substrate;
- a second electrode on the rear surface of the second substrate;
- a retardation layer on the front surface of the second substrate;
- a polarizer on the retardation layer;
- a holographic film on the polarizer, the holographic film for reducing an angle of light incident to the polarizer;
- and
- a liquid crystal layer between the first electrode and the second electrode.
A reflective cholesteric liquid crystal (CLC) display device, comprising:
- a first substrate;
- a second substrate;
- an absorption layer formed on the first substrate;
- a first alignment layer formed on the absorption layer;
- a cholesteric liquid crystal color filter layer formed on the first alignment layer;
- a first electrode formed on the cholesteric liquid crystal color filter layer;
- a second alignment layer formed on the first electrode;
- a second electrode formed on the second substrate;
- a third alignment layer formed on the second electrode;
- a liquid crystal layer interposed between the second alignment layer and the third alignment layer;
- a retardation layer formed on the second substrate;
- a polarizer formed on the retardation layer;
- a holographic film disposed on the polarizer;
- and
- a diffusion film formed on the holographic film.
A method of manufacturing a reflective cholesteric liquid crystal (CLC) display device, comprising:
- forming a first substrate;
- forming an absorption layer on the first substrate;
- forming a cholesteric liquid crystal (CLC) color filter on the absorption layer;
- forming a first electrode on the cholesteric liquid crystal (CLC) color filter;
- forming a second substrate spaced apart from the first substrate;
- forming a second electrode on the rear surface of the second substrate;
- forming a retardation layer on the front surface of the second substrate;
- forming a polarizer on the retardation layer;
- forming a holographic film on the polarizer, the holographic film for reducing an angle of light incident to the polarizer;
- and
- forming a liquid crystal layer between the first electrode and the second electrode.
A method of manufacturing a reflective cholesteric liquid crystal (CLC) display device, comprising:
- forming a first substrate;
- forming a second substrate;
- forming an absorption layer on the first substrate;
- forming a first alignment layer on the absorption layer;
- forming a cholesteric liquid crystal color filter layer on the first alignment layer;
- forming a first electrode on the cholesteric liquid crystal color filter layer;
- forming a second alignment layer on the first electrode;
- forming a second electrode on the second substrate;
- forming a third alignment layer on the second electrode;
- forming a liquid crystal layer interposed between the second alignment layer and the third alignment layer;
- forming a retardation layer on the second substrate;
- forming a polarizer on the retardation layer;
- forming a holographic film disposed on the polarizer;
- and
- forming a diffusion film on the holographic film.
Dependencies are inferred from the claim text.