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. 16, 2001
Filed:
Jul. 11, 1997
Dayakar Chandram Reddy, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A technique for modulating pixels of a display panel for forming an image. Each pixel has an associated pixel frame, which is a period of time during which the pixel is modulated to achieve an appropriate greyscale level for the pixel. Each pixel frame includes a plurality of sub-frames. During each of the sub-frames, the pixel is placed in 'on' condition or in an 'off' condition according to a selected one of a plurality of predetermined greyscale sequences. Each greyscale sequence corresponds to a greyscale level for the pixel frame. A display frame is formed when each pixel in the display is appropriately modulated according to an image to be displayed. The displayed image is continually updated by displaying a sequence of display frames. The display panel is divided into blocks of sixteen pixels arranged in a four-by-four array. The greyscale sequences for pixels in a block are offset from one another by various numbers of sub-frames. This offset is termed pixel dispersion. The pixel blocks are grouped in four-by-four arrays of sixteen pixel blocks. Greyscale sequences for modulating the pixels in a block are offset from sequences for pixels in other blocks in the array by various numbers of sub-frames. This offset is termed block dispersion. Multiple arrays of blocks are updated in an identical manner to form a complete display panel.