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:
Feb. 05, 2002
Filed:
Oct. 06, 1997
Hayato Denda, Kanagawa-ken, JP;
Masamichi Nakajima, Kanagawa-ken, JP;
Asao Kosakai, Kanagawa-ken, JP;
Junichi Onodera, Kanagawa-ken, JP;
Masayuki Kobayashi, Kanagawa-ken, JP;
Seiji Matsunaga, Kanagawa-ken, JP;
Fujitsu General Limited, Kawasaki, JP;
Abstract
In a subfield drive method, two subframes of the least brightness are arranged adjacently to each other to select and light up the display device in terms of the change in image brightness in the time axial direction. When, for example, the level of original signal changes from 7 to 8 or from 8 to 7, SF , SF , SF and SF are selected as subframes for level 8, and SF , F and SF are selected as subframes for level 7. This prohibiting any continuous lighting or non-lighting at the levels 7 and 8, there is no substantial change in brightness nor degradation of picture quality at that time. Any distortion of moving image (pseudo contour) is removed by the correction circuit having the frame memory that delays by one frame, the correction constant set circuit that outputs correction data, and the adder that adds the correction data to the original image signal.