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. 02, 1977
Filed:
Apr. 25, 1975
Applicant:
Inventors:
Assignee:
Energy Systems, Ltd., Iruma, JA;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
3501 / ;
Abstract
A field-effect liquid-crystal type display device employing a twisted alignment method is provided with a pair of electrode glass plates spaced apart from each other and a field-effect type liquid crystal with a positive dielectric anisotropy loaded in the space defined by the plates, the plates being disposed in such a manner that an angle formed by the alignment treatment directions of the plates is changed a proper angle from 90.degree., so that the twisting direction of molecules in the liquid crystal is unified and the liquid crystal type display device is improved to show homogeneity, and thus to reduce the number of dirty domains or spots in display.