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:
Dec. 18, 2001
Filed:
Sep. 14, 1999
Masaaki Kitajima, Hitachiota, JP;
Makoto Tsumura, Hitachi, JP;
Yoshiro Mikami, Hitachi, JP;
Katsuyuki Funahata, Hitachi, JP;
Yoshiharu Nagae, Hitachi, JP;
Yoko Wakui, Ibaraki-ken, JP;
Ryuichi Saito, Hitachi, JP;
Makoto Matsui, Kunitachi, JP;
Fumiaki Nemoto, Hitachi, JP;
Other;
Abstract
A liquid crystal active matrix display device includes a first substrate having a thin film transistor formed thereon. A light-screening film,is located on the first substrate in a manner to be overlapped with an ITO. The display device includes a second substrate having a color filter and a light-screening film,formed thereon. The second substrate is opposed to the first substrate. The light-screening film,extends from the uncontrollable area by a certain value depending on a voltage from the external, resulting in improving a numerical aperture.