US5083195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color display control system
Assignee: FFEI Ltd
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Filing: 1989-06-15
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Granted: 1992-01-21
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Expires: 2009-06-15
Abstract
Abstract A color display control system for use with a display (1) having a screen (2) capable of being activated so as to generate at least two colors. The system comprises at least one optical sensor (4,5) which detects optical radiation emitted from the display screen (2). A control system (10,11,13) is provided which is responsive to an output signal from the or each sensor (4,5) related to the intensity of the detected radiation to control the optical characteristics of the display so that the detected color is generated in a predetermined manner.
Inventors
- 👤 Graham C. Evelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:44
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/57; H04N5/58
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
A colour display control system for use with a display having a screen capable of being activated so as to generate at least two colours, the system comprising at least one optical sensor spaced from the screen for continuously detecting optical radiation emitted from said display screen corresponding to each of said colours generated by said screen, and control means responsive to an output signal from said sensor related to the intensity of the detected radiation to control the optical characteristics of said display in response to changes in ambient lighting conditions so that the detected so that the detected color is generated in a predetermined manner.
Claim 2
Dependent Claim
107 words
A colour display control system for use with a display having a screen capable of being activated so as to generate at least two colours, the system comprising at least one optical sensor spaced from the screen for continuously detecting optical radiation emitted from said display screen corresponding to each of said colours generated by said screen, and control means responsive to an output signal from said sensor related to the intensity of the detected radiation to control the optical characteristics of said display in response to changes in ambient lighting conditions so that the detected so that the detected color is generated in a predetermined manner.
Claim 3
Dependent Claim
12 words
A system according to claim 1, wherein there are two optical sensors.
Claim 4
Dependent Claim
20 words
A system according to claim 2, wherein said two optical sensors are mounted in diagonally opposite corners of said display.
Claim 5
Dependent Claim
34 words
A system according to claim 1, wherein said control means causes said display screen to display alternately at least two references pixels constituting different ones of said colours to be detected by said sensors.
Claim 6
Dependent Claim
13 words
A system according to claim 4, wherein three reference pixels are alternately displayed.
Claim 7
Dependent Claim
25 words
A system according to claim 5, wherein said three reference pixels are a red reference pixel, a green reference pixel and a blue reference pixel.
Claim 8
Dependent Claim
102 words
A colour display system comprising a display having a screen capable of being activated so as to generate at least two colours; and a control system comprising at least one optical sensor spaced from the screen for continuously detecting optical radiation emitted from said display screen corresponding to each of said colours generated by said screen, and control means responsive to an output signal from said sensor related to the intensity of the detected radiation to control the optical characteristics of said display in response to changes in ambient lighting conditions so that the detected colour is generated in a predetermined manner.
Claim 9
Dependent Claim
102 words
A colour display system comprising a display having a screen capable of being activated so as to generate at least two colours; and a control system comprising at least one optical sensor spaced from the screen for continuously detecting optical radiation emitted from said display screen corresponding to each of said colours generated by said screen, and control means responsive to an output signal from said sensor related to the intensity of the detected radiation to control the optical characteristics of said display in response to changes in ambient lighting conditions so that the detected colour is generated in a predetermined manner.
Claim 10
Dependent Claim
14 words
A system according to claim 7, wherein said display is a cathode ray tube.
Claim 11
Dependent Claim
32 words
A system according to claim 7, wherein said at least one sensor is mounted at a distance of between substantially 2.5 cm and 4 cm from the surface of said display screen.
Claim 12
Independent Claim
153 words
A method of operating a colour display system comprising a display having a screen capable of being activated so as to generate at least two colours; and a control system comprising at least one optical sensor spaced from the screen for continuously detecting optical radiation emitted from said display screen corresponding to each of said colours generated by said screen, and control means responsive to an output signal from said sensor related to the intensity of the detected radiation to control the optical characteristics of said display so that the detected colour is generated in a predetermined manner, said method comprising controlling said control means periodically to cause a reference pixel to be displayed on said screen, monitoring the resultant emitted radiation detected by said sensor, and controlling said display thereafter so as to compensate for any change in the detected radiation from an expected level based on changes in ambient lighting conditions.
Claim 13
Independent Claim
153 words
A method of operating a colour display system comprising a display having a screen capable of being activated so as to generate at least two colours; and a control system comprising at least one optical sensor spaced from the screen for continuously detecting optical radiation emitted from said display screen corresponding to each of said colours generated by said screen, and control means responsive to an output signal from said sensor related to the intensity of the detected radiation to control the optical characteristics of said display so that the detected colour is generated in a predetermined manner, said method comprising controlling said control means periodically to cause a reference pixel to be displayed on said screen, monitoring the resultant emitted radiation detected by said sensor, and controlling said display thereafter so as to compensate for any change in the detected radiation from an expected level based on changes in ambient lighting conditions.
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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) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |