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:
Aug. 17, 1993
Filed:
Apr. 09, 1990
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Molecules of the liquid crystal material of the liquid crystal display panel are oriented along the rubbing directions of the upper and lower substrates, and the orientation thereof tends to be twisted in one direction. The reverse domain wherein the orientation is twisted in the reverse direction occurs at portions of the liquid crystal. Though the reverse domain may be prevented form occurring by rubbing the substrates more strongly, it is impossible to sufficiently rub the surfaces of the respective substrates since the substrates are provided with picture element electrodes thereon so that the surfaces are uneven. The liquid crystal display panel is heated to a transformation point so as to change into an isotropic phase after filling the liquid crystal, then is cooled rapidly. This enables a liquid crystal display panel to be obtained in which the twisted directions of the orientation of the liquid crystal molecules are uniform.