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. 16, 2000
Filed:
Mar. 25, 1998
Seiko Epson Corporation, Tokyo, JP;
Abstract
The gray shade rendering capability of a display device having a frame rate of q frames per display cycle is enhanced by comparing an intensity value representing a gray shade of a current pixel with a respective dither matrix threshold value and providing a pixel on/off signal, storing a plurality of quantization values ranging from 1 to q in a quantization table, outputting p quantization values from the quantization table as active quantization values in accordance with a quantized pixel value p, shifting the quantization values in the table in response to a frame signal, comparing a quantized dither matrix threshold value to the active quantization values and producing an active quantized threshold signal, producing a pixel out signal in response to the pixel on/off signal and the active quantized threshold signal, and in response to the pixel out signal displaying the current pixel with an average gray value of p/q through a display period of q frames.