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:
Feb. 06, 2007
Filed:
Jul. 22, 2003
Ciska Doornkamp, Eindhoven, NL;
Ciska Doornkamp, Eindhoven, NL;
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
This invention relates to a transflective liquid crystal display device, having a plurality of pixels (), each comprising a liquid crystal layer () being sandwiched between a front and a back substrate (), a back light (), a semi-transparent reflective element (), being arranged between the back substrate () and the back light (), a front polarizer (), and a driving arrangement () for controlling optical properties of the liquid crystal layer (), whereby the pixel is subdivided into a reflective pixel part () and a transmissive pixel part (). According to the invention, a cholesteric layer composition () is arranged between said liquid crystal layer () and the back substrate (), said cholesteric layer composition comprising; in said reflective pixel part (), a first cholesteric layer composition part () for reflecting a desired primary pixel color, and in said transmissive pixel part () a second cholesteric layer composition part () for reflecting the remaining primary colors, other than said desired primary pixel color.