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:
Feb. 28, 2006
Filed:
Nov. 18, 2002
Sadayasu Fujibayashi, Saitama-ken, JP;
Tomonobu Motai, Kanagawa-ken, JP;
Sadayasu Fujibayashi, Saitama-ken, JP;
Tomonobu Motai, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A liquid crystal display device comprises a poly-silicon TFT substrate having a condenser type digital analog converter, an another substrate disposed so as to face the poly-silicon TFT substrate, and liquid crystal positioned between the poly-silicon TFT substrate and the another substrate. In this liquid crystal device, a light blocking film is formed on a surface of the another substrate and contacts with the liquid crystal. The light blocking film has a resistance larger than n·τ/Cwherein n is a number of bits of the condenser type digital analog converter, τ is an operation stabilizing time of a condenser per one bit, and Cis electrostatic capacitance between the poly-silicon TFT substrate and the another substrate.