Patent US4975778A successfully refreshed from Google Patents.
US4975778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pick-up apparatus including voltage controlled automatic iris control
Assignee: Samsung Electronics Co Ltd
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Filing: 1989-11-02
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Granted: 1990-12-04
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Expires: 2009-11-02
Abstract
Abstract An image pick-up apparatus comprises: an optical system for optically controlling incident light rays; an image pick-up device for converting the light rays to signal charges; a drive pulse generating circuit for outputting driving pulses in order to drive the image pick-up device; and a signal level detecting circuit. A voltage-controlled signal generating circuit is provided for maintaining the levels of the output signals of the image pick-up device at a constant level by controlling the driving pulses outputted from the drive pulse generating circuit in accordance with the levels of the output signals of the image pick-up device. According to the apparatus of the present invention, the structure becomes simple, miniaturization becomes possible, response speed becomes fast, and power consumption becomes negligible compared the conventional apparatus.
Inventors
- 👤 Oh-yeon Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/50; H04N25/53; H04N23/00; H04N23/70; H04N23/73; H04N25/70; H04N25/71; H04N25/74
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
179 words
An image pick-up apparatus, comprising: a optical system for optically controlling incident light rays to produce controlled light rays; an image pick-up device for receiving the controlled light rays from the optical system and for converting the controlled light rays into signal charges, the image pick-up device including means for converting the signal charges into output signals having varying levels; a drive pulse generating circuit connected to the image pick-up device for generating driving pulses for applying the driving pulses to the image pick-up device to drive the image pick-up device; a signal level detecting circuit connected to the image pick-up device for detecting the levels of the output signals from the image pick-up device; and a voltage-controlled signal generating circuit connected between the signal level detecting circuit and the drive pulse generating circuit for maintaining the levels of the output signals from the image pick-up device at a constant level by controlling the drive pulses generated by the drive pulse generating circuit in accordance with the levels of the output signals detecting by the signal level detecting circuit.
Claim 2
Dependent Claim
179 words
An image pick-up apparatus, comprising: a optical system for optically controlling incident light rays to produce controlled light rays; an image pick-up device for receiving the controlled light rays from the optical system and for converting the controlled light rays into signal charges, the image pick-up device including means for converting the signal charges into output signals having varying levels; a drive pulse generating circuit connected to the image pick-up device for generating driving pulses for applying the driving pulses to the image pick-up device to drive the image pick-up device; a signal level detecting circuit connected to the image pick-up device for detecting the levels of the output signals from the image pick-up device; and a voltage-controlled signal generating circuit connected between the signal level detecting circuit and the drive pulse generating circuit for maintaining the levels of the output signals from the image pick-up device at a constant level by controlling the drive pulses generated by the drive pulse generating circuit in accordance with the levels of the output signals detecting by the signal level detecting circuit.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein the image pick-up device comprises a charged coupled device.
Claim 4
Dependent Claim
82 words
An apparatus according to claim 1, wherein the voltage-controlled signal generating circuit includes means for generating control signals having a frequency which is proportional to the levels of the output signals detected by the level detecting circuit, the drive pulse generating circuit including means for generating driving pulses containing a reference pulse, the voltage-controlled signal generating circuit controlling the reference pulse according to the frequency of the control signals for producing output signals from the image pick-up device at a constant level.
Claim 5
Dependent Claim
16 words
An apparatus according to claim 3 wherein the image pick-up device comprises a charged coupled device.
References Cited (Backward Citations)
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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) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |