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:
Jun. 14, 1994
Filed:
Jan. 06, 1992
Thierry Leroux, Fontaine, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
A method for displaying, on a matrix screen composed of pixels disposed along K lines and M columns, images having Q grey levels G.sub.j, 0.ltoreq.j.ltoreq.Q-1. Pixels are scanned and to display a given grey level, a mixed number of black and white states of the pixels are displayed. The number of white states and the number of black states required to display a given grey level are calculated based on a number of sub-frames N used to display the grey scale image and the number of different grey scales Q. This assigns a black state or a white state to each of the addressing phase indices. The addressing phase indices are then selected according to predetermined rules and the states of the pixels in each sub-frame vary within a sub-frame displaying a given grey scale by keeping the number of black and white pixels of the sub-frame as constant as possible.