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. 18, 1994
Filed:
Dec. 30, 1992
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A liquid crystal display device including a liquid crystal panel. The liquid crystal device is made up of first and second substrates, a first alignment layer formed on a surface of the first substrate so as to have a first pre-tilt angle, a second alignment layer formed on a surface of the second substrate so as to have a second pre-tilt angle which is smaller than the first pre-tilt angle, a third alignment layer formed on the surface of the second substrate so as to have a third pre-tilt angle which is greater than the first pre-tilt angle, and nematic liquid crystal material filled in a space between the first and second substrates. The liquid crystal panel would be oriented so as to have a helical structure extending in a predetermined direction by the effect of the pre-tilt angles if nematic liquid crystal material having no twisting power were to be filled in a space between the first and second substrates, but the nematic liquid crystal material employed is of a kind effective to render the liquid crystal panel to be oriented so as to have a helical structure extending in a direction counter to the predetermined direction.