Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-01-25
2005-01-25
Kim, Robert H. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S122000, C349S138000, C349S158000
Reexamination Certificate
active
06847423
ABSTRACT:
A liquid-crystal display (LCD) device improves the performance of preventing the elution of impurity contained in the light-shielding layer (and the color layer) of the monochrome or color filter into the liquid crystal, thereby preventing defective operations of the LCD device (e.g., displaying defect) caused by impurity existing in the liquid crystal. The LCD device includes the protection layer made of a transparent organic resin, which satisfies at least one of a condition (a) that the transparent organic resin has a cross-link density of 70% or greater, and a condition (b) that the transparent organic resin has a Vickers hardness of 50 kgf/mm2or greater. Preferably, an amount of internal impurity of the filter is 3 ng/cm2or less. It is preferred that at least one selected from the group consisting of an acrylic resin, a styrene resin, and a polyimide resin is used as a base or matrix material of the transparent organic resin.
REFERENCES:
patent: 6413693 (2002-07-01), Bekku et al.
patent: 11-305216 (1999-11-01), None
Kimura Tetuya
Kotake Nariyoshi
Nishida Shin-ichi
Okamoto Mamoru
Takahashi Sounosuke
Caley Michael H
Foley & Lardner LLP
Kim Robert H.
NEC LCD Technologies Ltd.
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