US4935818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color monitor photo control system
Assignee: Individual
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Filing: 1989-05-05
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Granted: 1990-06-19
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Expires: 2009-05-05
Abstract
Abstract A color monitor photo control system having a controller and a rectangular cone-shaped shield to prevent outside light from shining on the screen. The shield has a photo-sensor provided adjacent to the camera to sense brightness of the screen, and a light-testing button provided adjacent to the photo-sensor. The camera has a switching line connected to the controller and mounted on the shutter of the camera to actuate the controller and mechanically open the shutter. The controller is electrically connected to a color monitor and a computer. The controller has a micro-processor, and a number of RGB visual signal switches. The micro-processor receives signals from the light-testing button, the two-step switching line and the photo-sensor to adjust the number of frames of the RGB visual signals to the color monitor during the opening of the shutter with the aid of the visual signal switches.
Inventors
- 👤 Hong Y. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:40
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40025; H04N1/46; H04N1/50; H04N1/506; H04N1/508
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
211 words
A color monitor photo control system comprising a controller connected to a switching line provided on a camera via a cable, and a cone-shaped shield; said switching line being mounted on a shutter of said camera to mechanically open said shutter of said camera, and actuating said controller; said shield preventing outside light from shining on said screen; said shield having a photo-sensor provided thereon adjacent to said camera to sense brightness of said screen; said controller being electrically connected to a color monitor and a computer which sends red, green and blue visual signals, vertical and horizontal synchronizing signals to said color monitor; said controller comprising first, second and third buffers, a micro-processor, and a plurality of red, green and blue visual signal switches; actuating signals produced by pulling down said switching line, said actuating signals being entered into said first buffer; brightness signals of said screen being produced by said photo-sensor and being entered into said second buffer; vertical synchronizing signals received by a detector from said computer being entered into said third buffer; and outputs of said micro-processor connected to said red, green and blue visual signal switches to adjust said number of frames of said red, green, and blue visual signals during said opening of said shutter.
Claim 2
Dependent Claim
211 words
A color monitor photo control system comprising a controller connected to a switching line provided on a camera via a cable, and a cone-shaped shield; said switching line being mounted on a shutter of said camera to mechanically open said shutter of said camera, and actuating said controller; said shield preventing outside light from shining on said screen; said shield having a photo-sensor provided thereon adjacent to said camera to sense brightness of said screen; said controller being electrically connected to a color monitor and a computer which sends red, green and blue visual signals, vertical and horizontal synchronizing signals to said color monitor; said controller comprising first, second and third buffers, a micro-processor, and a plurality of red, green and blue visual signal switches; actuating signals produced by pulling down said switching line, said actuating signals being entered into said first buffer; brightness signals of said screen being produced by said photo-sensor and being entered into said second buffer; vertical synchronizing signals received by a detector from said computer being entered into said third buffer; and outputs of said micro-processor connected to said red, green and blue visual signal switches to adjust said number of frames of said red, green, and blue visual signals during said opening of said shutter.
Claim 3
Dependent Claim
61 words
A color monitor photo control system as set fourth in claim 1, wherein a plurality of said outputs of said micro-processor are connected to inputs of a level adjuster; outputs of said level adjuster being connected to respective control inputs of said visual signal switches to control intensity of frames of said red, green and blue visual signals on said screen.
Claim 4
Dependent Claim
49 words
A color monitor photo control system as set fourth in claim 1, wherein a plurality of switches are connected to said inputs of said first buffer to pre-set photo modes, and a liquid crystal display is electrically connected to said output of said micro-processor to display said selected modes.
Claim 5
Dependent Claim
39 words
A color monitor photo control system as set fourth in claim 1, wherein a light-testing button is provided adjacent to said photo-sensor to actuate said photo-sensor to detect said brightness of said screen when pushing down said light-testing button.
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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |