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:
Oct. 24, 2006
Filed:
Feb. 12, 2003
Mark Thomas Johnson, Eindhoven, NL;
Guo-fu Zhou, Eindhoven, NL;
Alexander Victor Henzen, Heerlen, NL;
Michael Geoffrey Pitt, Kobe, JP;
Mark Thomas Johnson, Eindhoven, NL;
Guo-Fu Zhou, Eindhoven, NL;
Alexander Victor Henzen, Heerlen, NL;
Michael Geoffrey Pitt, Kobe, JP;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An electrophoretic display device () comprising one pixel () with an electrophoretic medium (), electrodes (), as well as drive means () by which the pixels can be brought into different optical states. Some time (thold) after the application of an addressing pulse (Paddress) for setting the brightness level (Rw, Rb) of a pixel (), a restore pulse voltage (Prestore) is applied between the electrodes () for restoring the brightness level of a pixel to the set level (Rw, Rb). The restore pulse may be a set of consecutive pulses to bring the drifted brightness level even more smoothly (i.e. less perceivably) back to the original brightness level.