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:
Dec. 09, 2008
Filed:
Oct. 13, 2004
Mark Thomas Johnson, Eindhoven, NL;
Lucas Josef Maria Schlangen, Eindhoven, NL;
Patrick John Baesjou, Eindhoven, NL;
Guofu Zhou, Eindhoven, NL;
Mark Thomas Johnson, Eindhoven, NL;
Lucas Josef Maria Schlangen, Eindhoven, NL;
Patrick John Baesjou, Eindhoven, NL;
Guofu Zhou, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention provides a novel design for color electrophoretic displays. In the display, each pixel () comprises at least two sub-pixels (), and each sub pixel is fitted with a color filter () and contains an electrophoretic media comprising two particle types (). The color filters () in the sub-pixels of each pixel have essentially non-overlapping absorption bands, and together cover essentially all of the wavelengths over which the display is operative. Furthermore, the absorption bands of the particles in each sub-pixel () each cover a portion of the wavelengths that is not covered by the filter () in the respective sub-pixel. The wavelength bands typically correspond to different colors. Thereby each wavelength band, or color, can be emitted by more than one sub-pixel in each pixel, resulting in increased brightness. According to one particular embodiment, each pixel comprises three sub-pixels having a cyan, magenta, and yellow absorbing filter, respectively.