US5010395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state imaging apparatus
Assignee: Olympus Corp
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Filing: 1989-03-13
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Granted: 1991-04-23
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Expires: 2009-03-13
Abstract
Abstract The solid state imaging apparatus having a black level correcting circuit of this invention has an imaging device provided with a solid state imaging device and a signal processing device connected to this imaging device, processing the picture image signal obtained by the solid state imaging device and outputting a video signal. The signal processing device is provided with a gain controlling amplifier receiving the photoelectrically converted output of the solid state imaging device and variably gain-controlling it and a direct current-clamping circuit direct current-clamping the optical black part included in the output signal of the solid state imaging device and stabilizing the black level of the video signal.
Inventors
- 👤 Kiyoshi Tsuji
- 👤 Kenji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:33
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/72; H04N23/00; H04N23/50; H04N23/555; H04N23/70; H04N23/76; H04N25/00; H04N25/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A solid state imaging apparatus comprising: an imaging means having a solid state imaging device for photoelectrically converting an object image and outputting a picture image signal; a signal processing means connected with said imaging means, for processing said picture image signal obtained by said solid state imaging device and outputting a video signal; a gain adjusting means provided in said signal processing means for receiving the photoelectrically converted output of said solid state imaging device and variably controlling the gain; and a direct current-clamping means connected to receive an output from said gain adjusting means for direct current-clamping an optical black part included in the output signal of said solid state imaging device and stabilizing the black level of said video signal.
Claim 2
Dependent Claim
123 words
A solid state imaging apparatus comprising: an imaging means having a solid state imaging device for photoelectrically converting an object image and outputting a picture image signal; a signal processing means connected with said imaging means, for processing said picture image signal obtained by said solid state imaging device and outputting a video signal; a gain adjusting means provided in said signal processing means for receiving the photoelectrically converted output of said solid state imaging device and variably controlling the gain; and a direct current-clamping means connected to receive an output from said gain adjusting means for direct current-clamping an optical black part included in the output signal of said solid state imaging device and stabilizing the black level of said video signal.
Claim 3
Dependent Claim
22 words
A solid state imaging apparatus according to claim 1, wherein said direct current-clamping means further comprises an operational amplifier for feedback clamping.
Claim 4
Dependent Claim
20 words
A solid state imaging apparatus according to claim 1, wherein said direct current-clamping means further comprises an LC oscillating circuit.
Claim 5
Dependent Claim
47 words
A solid state imaging apparatus according to claim 1, wherein said imaging means is an electronic endoscope having a tip part which has an insertable part which can be inserted into an object to be inspected, and said solid state imaging device is in said tip part.
Claim 6
Dependent Claim
44 words
A solid state imaging apparatus according to claim 4, wherein said electronic endoscope is an electronic endoscope having a simultaneous imaging system provided with color filter separating color lights of red, green and blue on the imaging surface of said solid state imaging device.
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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) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |