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:
Jan. 09, 1979
Filed:
Jun. 01, 1977
Gabor Magos, Budapest, HU;
Jozsef Szalai, Budapest, HU;
Villamos Berendezes es Keszulek Muvek, Budapest, HU;
Abstract
Circuit arrangement for the shaded (gray-scale) displaying of images on display boards having individual luminous elements arranged in a matrix, wherein switching circuits of the luminous elements are connected to row and column bars, and each bar is coupled to a selecting circuit either directly or through a store element. Each switching circuit includes an analog memory, a comparator with a constant threshold level, and a power switch. The memory is preferably a capacitor which is connected -- over a switching element -- between the respective row bar and column bar. A function generator supplying a monotonously varying periodic signal is connected to the bars that are directly connected to the capacitors whereas a video-signal transmitter is connected to the bars that are linked to the switching elements.