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:
Sep. 21, 1993
Filed:
Jul. 14, 1992
Norman D Richards, Horsham, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
The display apparatus includes circuitry for generating video signals for the display of still or motion pictures on a CRT or other display device. The apparatus further includes an arrangement for generating a test signal to display a test image to facilitate adjustment of the brightness (black level) setting of the CRT. The test image includes adjoining regions (100,102) of black and below-black levels, to forming a first image feature which is invisible at the correct brightness setting. If the brightness setting is too high, the first image feature is visible and forms a symbolic instruction indicating the necessary corrective adjustment. The test signal may be stored with picture information on a storage device.