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. 18, 1998
Filed:
Dec. 04, 1996
Yao-Dong Ma, Richardson, TX (US);
Advanced Display Systems, Inc., Amarillo, TX (US);
Abstract
A cholesteric liquid crystal display ('LCD') and methods of operating and manufacturing the LCD. The LCD includes: (1) a controllable cholesteric liquid crystal (CLC) located between first and second substrates, the controllable CLC selectively exhibiting an 'on' state and an 'off' state and having a circular polarity of a predetermined handedness when the controllable CLC is in the 'on' state and (2) a circular polarizer, located proximate the first substrate and having a circular polarity of a particular handedness, that cooperates with the controllable CLC to increase the difference between the relative brightness of the 'on' state and the 'off' state, whereby a contrast ratio of the cholesteric LCD is increased.