The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2002
Filed:
Dec. 23, 1998
Yasuhiro Morii, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid crystal display device having high contrast ratio and high display quality which does not give any impression of roughness on display plane is provided. An amount of charges on the surface of spacers is made zero or almost zero, whereby brightness of a region where spacers are arranged is adjusted to be at most twice the brightness of that region where the spacers are not arranged in a black (dark) display state, with the spacers distribution density being 100 to 600 particles/mm and the spacers diameter being 2 to 6 &mgr;m. For this purpose, as the spacers for keeping constant a space between an electrode substrate and a counter substrate, those formed by an acrylate resin with its surface plated with gold and having surface specific resistance of 5 &OHgr;·m and diameter of 6 &mgr;m are used. Further, the spacers may be distributed by using a spacer distributing apparatus having a spacer carrier pipe system formed of the same material as the surface material of the spacers.