US5596349A
Expired / Lapsed
US
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Image information processor
Assignee: Sanyo Electric Co Ltd
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Filing: 1993-09-28
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Granted: 1997-01-21
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Expires: 2013-09-28
Abstract
Abstract An image information processor for a liquid crystal display by a digital driver is intended to provide image display near to a source image by making continuous-tone image display by pseudo representations. The image information processor generates L-bit image display data based on P-bit source image data, L being less than P. Added to source image data of a picture element of the Nth frame (where N is a natural number of 2 or greater) is error data corresponding to the picture element of the (N-1)th frame at the same position as the picture element of the Nth frame. The high-order L bits of the P-bit data resulting from the addition are used as image display data of the picture element of the Nth frame and at least one bit of the remaining low-order bit data is held as error data of the picture element of the Nth frame. Thus, error data of a picture element of one frame is added to the same picture element of the next frame, thereby lessening the brightness difference between both the picture elements and smoothing a time change in brightness.
Inventors
- 👤 Mitsugu Kobayashi
- 👤 Makoto Fujioka
- 👤 Atsuyoshi Tanioka
- 👤 Kazuhiko Moriwaki
- 👤 Makoto Shimizu
- 👤 Hisao Uehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:47
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/2007; G09G3/2059; G09G3/2062; G09G3/34; G09G3/36; G09G3/3611; G09G3/2018
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
264 words
An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising: (a) addition means, when it is assumed that N is a natural number of 2 or greater, for adding error data of a picture element of an (N-1)st frame to the corresponding picture element data of an Nth frame; (b) information selection means for outputting high-order L bits of P-bit data provided by said addition means as image display data of the Nth frame and at least one bit of the remaining (P-L) bits as error data of the picture element of the Nth frame; (c) means for storing said error data; (d) means for calculating a difference between source image data of the (N-1)st frame and the corresponding source image data of the Nth frame; and (e) comparison means for determining whether or not the difference exceeds a predetermined value, wherein when the difference exceeds the predetermined value, said information selection means does not output the image display data and outputs the high-order L bits of the source image data of the Nth frame as the image display data of the Nth frame.
Claim 2
Dependent Claim
264 words
An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising: (a) addition means, when it is assumed that N is a natural number of 2 or greater, for adding error data of a picture element of an (N-1)st frame to the corresponding picture element data of an Nth frame; (b) information selection means for outputting high-order L bits of P-bit data provided by said addition means as image display data of the Nth frame and at least one bit of the remaining (P-L) bits as error data of the picture element of the Nth frame; (c) means for storing said error data; (d) means for calculating a difference between source image data of the (N-1)st frame and the corresponding source image data of the Nth frame; and (e) comparison means for determining whether or not the difference exceeds a predetermined value, wherein when the difference exceeds the predetermined value, said information selection means does not output the image display data and outputs the high-order L bits of the source image data of the Nth frame as the image display data of the Nth frame.
Claim 3
Dependent Claim
24 words
The image information processor as claimed in claim 1 further including information clear means for clearing the error data every given number of frames.
Claim 4
Dependent Claim
68 words
The image information processor as claimed in claim 2 wherein the error data are composed of n bits, a value of a×2 n is set in said information clear means, where a is a selected constant and n and a are natural numbers, and said information clear means clears the error data every a×2 n frames on the basis of the value set in said information clear means.
Claim 5
Dependent Claim
200 words
An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising: (a) addition means, when it is assumed that N is a natural number of 2 or greater, for adding error data of a picture element of an (N-1)st frame to the corresponding picture element data of an Nth frame; (b) information selection means for outputting high-order L bits of P-bit data provided by said addition means as image display data of the Nth frame and at least one of the high-order bits of the remaining (P-L) bits as error data of the picture element of the Nth frame; (c) means for storing said error data; and (d) information clear means for clearing the error date every given number of frames.
Claim 6
Dependent Claim
200 words
An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising: (a) addition means, when it is assumed that N is a natural number of 2 or greater, for adding error data of a picture element of an (N-1)st frame to the corresponding picture element data of an Nth frame; (b) information selection means for outputting high-order L bits of P-bit data provided by said addition means as image display data of the Nth frame and at least one of the high-order bits of the remaining (P-L) bits as error data of the picture element of the Nth frame; (c) means for storing said error data; and (d) information clear means for clearing the error date every given number of frames.
Claim 7
Dependent Claim
68 words
The image information processor as claimed in claim 4 wherein the error data are composed of n bits, a value of a×2 n is set in said information clear means, where a is a selected constant and n and a are natural numbers, and said information clear means clears the error data every a×2 n frames on the basis of the value set in said information clear means.
Claim 8
Dependent Claim
30 words
The image information processor as claimed in claim 4 further including information clear means for clearing the error data every plurality of lines while changing the lines according to frames.
Claim 9
Dependent Claim
52 words
The image information processor as claimed in claim 4 wherein said information selection means output only high-order L bits of P-bit data provided by said addition means and only at least one of the high-order bits of the remaining (P-L) bits as error data of the picture element of the Nth frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-21 | 2000-07-22 | 2001-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-21 | 2004-07-22 | 2005-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-21 | 2008-07-22 | 2009-01-21 | $7700.00 | Window Closed / Lapsed |