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:
Aug. 21, 2001
Filed:
Nov. 24, 1998
Steven F. Wald, Tualatin, OR (US);
Terrance S. Larsson, Sherwood, OR (US);
Larry Arbuthnot, Beaverton, OR (US);
Eric Wald, Tualatin, OR (US);
Planar Systems, Inc, Beaverton, OR (US);
Abstract
The system illuminates an active matrix EL device (AMEL) to provide a gray scale display. The device includes a first electrode layer comprising an active matrix of individually addressable pixel electrodes, a second electrode layer, and a thin film EL laminate stack including at least an EL phosphor layer and a dielectric layer. The stack is disposed between the first and second electrode layers. A first group of selected ones of the pixel electrodes are addressed with data signals during a first subframe time period where the first group includes fewer than all of the pixels electrodes of the display. The second electrode layer is driven during the first subframe time period with a first illumination signal. A second group of selected ones of the pixel electrodes are addressed with data signals during a second subframe time period where the second group includes at least one pixel electrode not included within the first group. The second electrode layer is driven during the second subframe time period with a second illumination signal.