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:
Apr. 03, 2012
Filed:
Dec. 11, 2006
Sander Jurgen Roosendaal, Eindhoven, NL;
Martinus Hermanus Wilhelmus Maria Van Delden, Eindhoven, NL;
Sander Jurgen Roosendaal, Eindhoven, NL;
Martinus Hermanus Wilhelmus Maria Van Delden, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A reflective display, comprising a plurality of pixels (), each having a first electrode, a light-modifying layer (), and a second electrode () arranged to enable formation of an electric field in the light-modifying layer () through application of a voltage between the electrodes. The pixel () further includes an active portion () which is switchable between light-modifying states by means of said electric field, and an inactive portion (). The inactive portion () is arranged for reflecting light so as to direct at least a fraction of incoming light () impinging on the inactive portion () towards the active portion (). As a result, a contrast ratio of the reflective display is improved, since light is now directed from the inactive portion towards the active portion and thus contributes to the displayed image as observed by a viewer.