Patent US5109390A successfully refreshed from Google Patents.
US4679072A
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Color adjusting device
Assignee: Canon Inc
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Filing: 1985-12-13
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Granted: 1987-07-07
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Expires: 2005-12-13
Abstract
Abstract The color adjusting device of the invention is provided with coordinate axis converting means in which a plurality of independent chrominance signals at the respective inlets after having been converted with respect to the coordinate axes based on a linear equation whose terms include trigonometrical functions, are placed onto respective outlets. This coordinate axis converting means includes memories operating with preset certain functions, and, moreover, has a function of turning the axes for the ordinates of the chrominance signals about their origin in the common plane, and includes vector level control means for the chrominance signals in the turned axes. That coordinate axis converting means further includes means receptive of the chrominance signals for producing a luminance signal and means for controlling the level of the luminance signal.
Inventors
- 👤 Makoto Takayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:42
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/68
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
66 words
A color adjusting device comprising: (a) a plurality of channel means for inputting a plurality of chrominance signal informations; (b) memory means for transforming the levels of said plurality of chrominance signal informations coming in through said plurality of channel means based on respective different functions from one another, whereby said functions of said memory means are expressed by linear equations whose terms include trigonometrical functions.
Claim 2
Dependent Claim
66 words
A color adjusting device comprising: (a) a plurality of channel means for inputting a plurality of chrominance signal informations; (b) memory means for transforming the levels of said plurality of chrominance signal informations coming in through said plurality of channel means based on respective different functions from one another, whereby said functions of said memory means are expressed by linear equations whose terms include trigonometrical functions.
Claim 3
Dependent Claim
43 words
A device according to claim 1, wherein said memory means includes first memory means for forming luminance signal information from the plurality of chrominance signal informations and second memory means for forming color difference signal informations from said plurality of chrominance signal informations.
Claim 4
Dependent Claim
37 words
A device according to claim 2, wherein said memory means further includes third memory means for forming a plurality of independent chrominance signal informations by using the output signals of said first and said second memory means.
Claim 5
Dependent Claim
44 words
A device according to claim 2, wherein said first and second memory means each have terminals for inputting said plurality of chrominance signal informations and, besides said terminals, signal input terminals for varying the individual outputs of said first and said second memory means.
Claim 6
Dependent Claim
95 words
A device according to claim 1, wherein said memory means includes fourth memory means receptive of said plurality of chrominance signal information for producing a luminance signal information and two color difference signals, fifth memory means for linearly transform the luminance signal information formed by said fourth memory means, sixth memory means for transforming the two color difference signals formed by said fourth memory means based on respective prescribed trigonometrical functions, and seventh memory means for forming a plurality of independent chrominance signal information by using the outputs of said fifth and sixth memory means.
Claim 7
Dependent Claim
139 words
A color adjusting device comprising: (a) a plurality of channel means for inputting a plurality of chrominance signal informations; (b) first matrix means receptive of the plurality of chrominance signal informations through said plurality of channel means for producing a luminance signal information and a plurality of color difference signal informations; (c) luminance level control means for controlling the level of the luminance signal information formed by said first matrix means; (d) phase shifting means for transforming the plurality of color difference signal informations formed by said first matrix means based on respective prescribed trigonometrical functions; (e) angle control means for controlling the angle variable of the trigonometrical functions in said phase shifting means; and (f) color difference level control means for controlling the common level of the plurality of color difference signal informations in said phase shifting means.
Claim 8
Dependent Claim
139 words
A color adjusting device comprising: (a) a plurality of channel means for inputting a plurality of chrominance signal informations; (b) first matrix means receptive of the plurality of chrominance signal informations through said plurality of channel means for producing a luminance signal information and a plurality of color difference signal informations; (c) luminance level control means for controlling the level of the luminance signal information formed by said first matrix means; (d) phase shifting means for transforming the plurality of color difference signal informations formed by said first matrix means based on respective prescribed trigonometrical functions; (e) angle control means for controlling the angle variable of the trigonometrical functions in said phase shifting means; and (f) color difference level control means for controlling the common level of the plurality of color difference signal informations in said phase shifting means.
Claim 9
Dependent Claim
45 words
A device according to claim 6, further comprising second matrix means receptive of the plurality of color difference signal informations through said phase shifting means and the luminance signal information through said luminance level control means for producing a plurality of independent chrominance signal informations.
Claim 10
Dependent Claim
40 words
A device according to claim 6, wherein said plurality of color difference signal informations include difference informations between the red chrominance signal information and the luminance signal information and between the blue chrominance signal information and the luminance signal information.
Claim 11
Dependent Claim
25 words
A device according to claim 6, wherein said plurality of chrominance signal informations include chrominance signal informations of red color, green color and blue color.
Claim 12
Dependent Claim
15 words
A device according to claim 6, wherein said first matrix means includes a semiconductor memory.
Claim 13
Dependent Claim
15 words
A device according to claim 6, wherein said phase shifting means includes a semiconductor memory.
Claim 14
Dependent Claim
15 words
A device according to claim 7, wherein said second matrix means includes a semiconductor memory.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |