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. 04, 1992
Filed:
May. 01, 1991
Enrique Rodriguez-Cavazos, Indianapolis, IN (US);
Gunter Gleim, Villingen, DE;
Jacques Chauvin, Monchweiler, DE;
Thomson Consumer Electronics, Inc., Indianapolis, IN (US);
Abstract
A television apparatus comprises a video display having a wide format display ratio, for example approximately 16:9. A deflection circuit generates first and second selectable rasters having a common horizontal scan width corresponding to the display but having first and second vertical heights respectively, for example nominal and overscanned vertical heights. A control circuit selects one of the first and second rasters for displaying pictures from wide format display ratio video sources and conventional format display ratio video sources respectively, for example 16:9 and 4:3. A picture from the wide format display ratio video source is substantially uncropped and a picture from the conventional format display ratio video source is expanded and cropped. One of the vertical formats provides substantially no image aspect ratio distortion of the pictures as displayed. The other one of the vertical formats provides substantially no cropping of the pictures as displayed. The relative amounts of image aspect ratio distortion and cropping of the pictures as displayed are substantially inversely proportional. One of the vertical formats provides substantially no image aspect ratio distortion and substantially no cropping of the active picture portion as displayed, when the video source is in letterbox format. A convergence control system can be provided which automatically adjusts to the selected vertical format.