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Patent US5119086A successfully refreshed from Google Patents.
US5119086A
Expired / Lapsed
US
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Apparatus and method for gray scale display
Assignee: Hitachi Ltd
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Filing: 1989-06-14
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Granted: 1992-06-02
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Expires: 2009-06-14
Abstract
Abstract Disclosed is a system selecting one out of a plurality of gray scale signals for each color information in display information including color information of a plurality of colors for providing monochromatic gray scale signals at multiple levels corresponding to the display information, or, when multiple colors are produced by combining a plurality of colors, selecting one out of a plurality of gray scales for each color corresponding to gray scales of the multiple colors, to thereby attain a multi-level monochromatic emulation display.
Inventors
- 👤 Kiyokazu Nishioka
- 👤 Hiroyuki Mano
- 👤 Nobuo Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:53
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G5/00; G09G5/02; G09G5/028; G09G3/2007; G09G3/2018
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
An apparatus for gray scale display comprising: display memory means for storing display information, including color information for colors formed by combining a plurality of colors; gray scale signal generating means for generating a plurality of gray scale signals for a predetermined color corresponding to one of the colors represented by the color information; gray scale selecting means responsive to receipt of the plurality of gray scale signals for the predetermined color from said gray scale signal generating means for selecting one of the gray scale signals for the predetermined color; means for controlling the gray scale corresponding to each of the plurality of colors to obtain a specific display contrast; and video signal generating means for generating a video signal corresponding with the gray scale signal selected by said selecting means.
Claim 2
Independent Claim
132 words
An apparatus for gray scale display comprising: display memory means for storing display information, including color information for colors formed by combining a plurality of colors; gray scale signal generating means for generating a plurality of gray scale signals for a predetermined color corresponding to one of the colors represented by the color information; gray scale selecting means responsive to receipt of the plurality of gray scale signals for the predetermined color from said gray scale signal generating means for selecting one of the gray scale signals for the predetermined color; means for controlling the gray scale corresponding to each of the plurality of colors to obtain a specific display contrast; and video signal generating means for generating a video signal corresponding with the gray scale signal selected by said selecting means.
Claim 3
Dependent Claim
59 words
The apparatus for gray scale display according to claim 1, wherein: said gray scale signal generating means includes means for generating gray scale signals of a number larger than the number of colors represented by the color information; and said gray scale selecting means includes means for selecting any of the gray scale signals for each of the colors.
Claim 4
Dependent Claim
32 words
The apparatus for gray scale display according to claim 1, further comprising display means coupled to said video signal generating means for displaying the video display represented by the generated video signal.
Claim 5
Independent Claim
83 words
A method for gray scale display comprising the steps of: storing display information, including color information for colors formed by combining a plurality of colors; generating a plurality of gray scale signals for a predetermined color corresponding to one of the colors represented by the color information; selecting one of the plurality of gray scale signals for the predetermined color; controlling the selected gray scale signal of the predetermined color to obtain a specific display contrast; and displaying the controlled gray scale signal.
Claim 6
Independent Claim
83 words
A method for gray scale display comprising the steps of: storing display information, including color information for colors formed by combining a plurality of colors; generating a plurality of gray scale signals for a predetermined color corresponding to one of the colors represented by the color information; selecting one of the plurality of gray scale signals for the predetermined color; controlling the selected gray scale signal of the predetermined color to obtain a specific display contrast; and displaying the controlled gray scale signal.
Claim 7
Dependent Claim
56 words
The method for gray scale display according to claim 4, wherein: the gray scale signal generating step includes generating gray scale signals of a number larger than the number of colors represented by the color information; and the gray scale signal selecting step includes selecting any of the gray scale signals for each of the colors.
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EP0192815A2
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US4827255A
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GB8603614D0
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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) | 1995-06-02 | 1995-12-02 | 1996-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-02 | 1999-12-02 | 2000-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-02 | 2003-12-02 | 2004-06-02 | $7700.00 | Window Closed / Lapsed |