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:
May. 15, 2001
Filed:
Sep. 14, 1998
Claude E. Tew, Dallas, TX (US);
Dana Dudley, Plano, TX (US);
Keith H. Elliott, Plano, TX (US);
Mark L. Burton, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Methods of controlling the illumination source (,) of an SLM-based display system (,). It is assumed that the system (,) displays pixel data formatted into a bit-plane format so that all bits of the same bit-weight can be displayed simultaneously. To provide greyscale, the amplitude of the source (,) may be modulated so that bit-planes having greater bit-weights are displayed with more intense illumination than bit-planes having smaller bit-weights (FIGS.,and,). To avoid visual artifacts, the duty cycle of the bit-plane display times may be shortened relative to the frame period. (FIG.,A). The latter method can be accompanied by a shortening of the duty time of the illumination on SLM (,). (FIG.,B). The short duty cycle method may be used together with illumination amplitude modulation, or it may be used with the PWM method of providing greyscale.