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. 25, 1984
Filed:
May. 25, 1982
Applicant:
Inventors:
Hiroshi Kawarada, Hirakata, JP;
Toshio Tatsumichi, Ando, JP;
Yasuo Wakahata, Katano, JP;
Mitsuyoshi Hamanaka, Kadoma, JP;
Tamotsu Kajitani, Suita, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; G02F / ; C09K / ;
U.S. Cl.
CPC ...
350340 ; 25229901 ; 2522991 ; 2522994 ; 25229963 ; 25229967 ; 350334 ; 350349 ; 3503 / ; 428-1 ;
Abstract
The present invention provides a liquid crystal color display panel of improved positive contrast by utilizing the so-called Guest-Host effect.