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:
Dec. 17, 1985
Filed:
Jul. 12, 1982
Randy W Watkins, Sun Valley, CA (US);
Robert J Bell, Moorpark, CA (US);
Joseph A Martorano, Studio City, CA (US);
Walter F Essinger, Thousand Oaks, CA (US);
Sigmatron Nova, Inc., Thousand Oaks, CA (US);
Abstract
A plurality of memory sections is provided each storing binary data to be employed for refreshing picture elements of a thin-film EL matrix display panel on successive frame time periods constituting an integration time period. The number of frame time periods in an integration time period corresponds to the number of different shades to be displayed on the panel. The binary data stored in each of the memory sections differs. Thus, when the binary data in the memory sections are read out on successive frame time periods, some of the picture elements on the panel are refreshed more than others during the integration time period. Accordingly, the eye of the viewer receives more light from some picture elements than others during each integration time period which results in the relative brightness levels and, therefore, the shades of the picture elements to vary. In a modified embodiment of the present invention each of the memory sections is binarily weighted and, during an integration time period, each memory section is read out a number of frame time periods corresponding to its binary weight in order to obtain the different brightness levels or shades on the panel.