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:
Nov. 16, 2004
Filed:
Nov. 26, 2002
Tatumi Naganuma, Nagano, JP;
Totoku Electric Co., Ltd., Tokyo, JP;
Abstract
A liquid crystal display comprises a 1024-to-1021 gray scale conversion calculator for converting an image data A of 1024 gray levels (=10 bits) into an image data Y of 1021 gray levels, an adjusting four-level sample storage and a random number generator circuit for randomly selecting and releasing on the frame-by-frame basis a group of the adjusting four gray levels &Dgr; p to &Dgr; p, &Dgr; q to &Dgr; q, and &Dgr; r to &Dgr; r which is determined by the least two bits Y of the image data Y of 1021 gray levels at each of segments (p,q,r) of one pixel, an adder 23 for summing the upper eight bits Y of the image data Y of 1021 gray levels and one group of the adjusting four gray levels to have three sets of image data of 256 gray levels D p to D p, D q to D q, and D r to D r which are then released in a sequence, and a 256 gray scale three-segment monochrome liquid crystal display panel . As the result, the apparatus needs no gray scale conversion table and can be minimized in the overall cost. Also, the image of which the number of gray levels is greater than that of a display panel can speciously be reproduced with explicitness.