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:
Nov. 14, 2000
Filed:
Apr. 12, 1999
Nobuyuki Shigeno, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A reflection type liquid crystal display device including a panel, a polarizing plate, and a 1/4 wavelength plate, with the polarizing plate and the 1/4 wavelength plate being placed upon the panel. The panel includes a transparent first substrate disposed at the external light incoming side; a second substrate opposing the first substrate, with the first substrate and the second substrate being put together so as to be separated by a predetermined distance; nematic liquid crystals kept in the gap between the substrates, with the molecules thereof having a twisted orientation; and an electrode, formed at both of the substrates, for applying a voltage to the nematic liquid crystals. When a voltage is not applied, the orientation of the molecules of the nematic liquid crystals is maintained, so that the nematic liquid crystals act together as a 1/4 wavelength layer. Therefore, the nematic liquid crystals cooperate with the polarizing plate and the 1/4 wavelength plate in order to pass external light and produce a white display. On the other hand, when a voltage is applied, the orientation of the molecules of the nematic liquid crystals is changed to a substantially vertical orientation, so that the nematic liquid crystals lose their ability to act together as a 1/4 wavelength layer.