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:
Nov. 23, 2010
Filed:
Aug. 22, 2003
Alan G. Knapp, Crawley, GB;
David A. Fish, Haywards Heath, GB;
Jurgen J. L. Hoppenbrouwers, Eindhoven, NL;
Roel Van Woudenberg, Eindhoven, NL;
Nijs C. Van Der Vaart, Rosmalen, NL;
Alan G. Knapp, Crawley, GB;
David A. Fish, Haywards Heath, GB;
Jurgen J. L. Hoppenbrouwers, Eindhoven, NL;
Roel Van Woudenberg, Eindhoven, NL;
Nijs C. Van Der Vaart, Rosmalen, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
In an active matrix electroluminescent display device, an overall brightness level of an image to be displayed in a frame period is determined. A drive transistor of each pixel is controlled in dependence on an input drive signal for the pixel and on the overall brightness level, for example using a signal processor () to vary the pixel drive signals. This arrangement can control the pixels to limit the maximum currents drawn by the pixels, thereby limiting the cross talk effects resulting from voltage drops along row or column conductors. If an image is bright, the pixel drive levels across the image (or at least a part of the image) can be reduced, so that the maximum brightness is reduced.