US4962418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color picture display apparatus
Assignee: Toshiba Corp
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Filing: 1988-06-30
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Granted: 1990-10-09
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Expires: 2008-06-30
Abstract
Abstract In a color picture display apparatus for monitoring colors of a picture displayed on a display such as a CRT based on picture signals picked up by a imaging camera, in which a signal processor operates luminous characteristics such as chromaticity and luminance of the actual display, obtained with reference to reference color signals, and ideal luminous characteristics such as chromaticity and reference white chromaticity of an ideal display to obtain correction values, and a corrector corrects the picture signals on the basis of the correction values to obtain corrected picture signals to be fed to the display for displaying a corrected picture. The correction values may be stored in a memory.
Inventors
- 👤 Ryuichi Kamaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:29
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/04; H04N9/00; H04N9/64; H04N9/73
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A color picture display apparatus, comprising: display means for displaying a picture on the basis of picture signals picked up by an optoelectronic device: detecting means, arranged in front of the display means, for detecting luminous characteristics of the display means with reference to reference color signals for reference colors; processing means for processing the luminous characteristics of the display means and ideal luminous characteristics of an ideal display to obtain correction values; and correcting means for correcting the picture signals on the basis of the correction values to obtain corrected picture signals to be fed to the display means for displaying a corrected picture; the luminous characteristics of the display means including chromaticity and luminance, the ideal luminous characteristics of the ideal display including the chromaticity and reference white chromaticity.
Claim 2
Dependent Claim
131 words
A color picture display apparatus, comprising: display means for displaying a picture on the basis of picture signals picked up by an optoelectronic device: detecting means, arranged in front of the display means, for detecting luminous characteristics of the display means with reference to reference color signals for reference colors; processing means for processing the luminous characteristics of the display means and ideal luminous characteristics of an ideal display to obtain correction values; and correcting means for correcting the picture signals on the basis of the correction values to obtain corrected picture signals to be fed to the display means for displaying a corrected picture; the luminous characteristics of the display means including chromaticity and luminance, the ideal luminous characteristics of the ideal display including the chromaticity and reference white chromaticity.
Claim 3
Dependent Claim
19 words
The apparatus according to claim 1, further comprising means for storing the correction values obtained by the correcting means.
Claim 4
Dependent Claim
40 words
The apparatus according to claim 1, further comprising means for generating the reference color signals and switch means for selecting one of the correcting means and the generating means in order to connect the selected one to the display means.
Claim 5
Dependent Claim
35 words
The apparatus according to claim 1, wherein the correcting means includes a by-pass for avoiding the correction of the picture signals therein to allow the picture signals to be directly fed to the display means.
Claim 6
Dependent Claim
14 words
The apparatus according to claim 1, wherein the detecting means includes color detector elements.
Claim 7
Dependent Claim
89 words
The apparatus according to claim 1, further comprising means for generating the reference color signals and means for defining a display surface of the display means to a normal picture display area for displaying the picture on the basis of the picture signals and a reference color display area for displaying the reference colors of the reference color signals, the defining means being connected to the display means, the generating means and the correcting means, the color detector elements being arranged in front of the reference color display area.
Claim 8
Dependent Claim
18 words
The apparatus according to claim 6, wherein the color detector elements are detachably covered by a cover means.
Claim 9
Dependent Claim
26 words
The apparatus according to claim 6, wherein the reference color display area is positioned in a peripheral portion of the display surface of the display means.
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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) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |