US4710816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture signal generating apparatus
Assignee: Nikon Corp
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Filing: 1986-09-25
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Granted: 1987-12-01
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Expires: 2006-09-25
Abstract
Abstract A picture signal generating apparatus has a CCD line sensor. In this apparatus, an image read instruction pulse is generated whenever a CCD line sensor or an original image is moved by a predetermined distance, an exposure is detected by a time integral determined by a pulse interval of the image read instruction pulses upon detection of an intensity of light reflected by or transmitted through the original image, and an image output from the CCD line sensor in response to the image read instruction pulse is normalized according to the detected exposure. Image output normalization can be achieved by dividing the CCD line sensor image output by the exposure or by controlling the intensity of the illumination light so as to keep the exposure constant.
Inventors
- 👤 Seiichi Yabumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:35
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40056
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
169 words
An apparatus for illuminating an object with illuminating means, providing a relative displacement between a linear image sensor and a pattern distribution of light from the object in a direction substantially perpendicular to an alignment direction of a plurality of photoelectric transducer elements constituting said linear image sensor, and controlling a picture signal of said image sensor according to the pattern distribution of light from the object, including: (a) means for detecting the relative displacement and generating a displacement detection signal whenever a predetermined displacement occurs between said image sensor and the pattern distribution of light from the object; (b) exposure detecting means having light-receiving means for receiving light from said illuminating means, said exposure detecting means being adapted to detect an exposure of said light-receiving means upon illumination of light from said illuminating means in response to the displacement detection signal and to generate an exposure detection signal representing the detected exposure; and (c) normalizing means for normalizing the picture signal in response to the exposure detection signal.
Claim 2
Independent Claim
169 words
An apparatus for illuminating an object with illuminating means, providing a relative displacement between a linear image sensor and a pattern distribution of light from the object in a direction substantially perpendicular to an alignment direction of a plurality of photoelectric transducer elements constituting said linear image sensor, and controlling a picture signal of said image sensor according to the pattern distribution of light from the object, including: (a) means for detecting the relative displacement and generating a displacement detection signal whenever a predetermined displacement occurs between said image sensor and the pattern distribution of light from the object; (b) exposure detecting means having light-receiving means for receiving light from said illuminating means, said exposure detecting means being adapted to detect an exposure of said light-receiving means upon illumination of light from said illuminating means in response to the displacement detection signal and to generate an exposure detection signal representing the detected exposure; and (c) normalizing means for normalizing the picture signal in response to the exposure detection signal.
Claim 3
Dependent Claim
59 words
An apparatus according to claim 1, wherein said light-receiving means comprises means for generating a light intensity signal representing an intensity of light received thereby, said exposure detecting means comprises integrating means for integrating the light intensity signal, said integrating means being adapted to interrupt integration in response to the displacement detection signal and to restart the integration thereafter.
Claim 4
Dependent Claim
29 words
An apparatus according to claim 2, wherein said normalizing means includes means for dividing the picture signal by the exposure detection signal in response to the displacement detection signal.
Claim 5
Dependent Claim
31 words
An apparatus according to claim 3, wherein said exposure detecting means outputs as the exposure detection signal a value obtained by causing said integrating means to integrate the light intensity signal.
Claim 6
Dependent Claim
34 words
An apparatus according to claim 2, wherein said normalizing means includes means for controlling an intensity of light emitted from said illuminating means to said light-receiving means, in response to the exposure detection signal.
Claim 7
Dependent Claim
54 words
An apparatus according to claim 1, wherein said illuminating means comprises a light source and an optical member for partially transmitting light from said light source and reflecting a remaining component of the light, and said light-receiving means receives light emitted from said light source and reflected by or transmitted through said optical member.
Claim 8
Independent Claim
92 words
An apparatus having a plurality of photoelectric transducer elements arranged in one direction, said apparatus being adapted to parallel output a first output from a plurality of odd-numbered ones of said photoelectric transducer elements and a second output from a plurality of even-numbered ones of said photoelectric transducer elements, including: (a) generating means for combining the first and second outputs to generate a composite picture signal; and (b) control means for controlling such that DC levels of the first and second outputs input to said generating means substantially coincide with each other.
Claim 9
Independent Claim
92 words
An apparatus having a plurality of photoelectric transducer elements arranged in one direction, said apparatus being adapted to parallel output a first output from a plurality of odd-numbered ones of said photoelectric transducer elements and a second output from a plurality of even-numbered ones of said photoelectric transducer elements, including: (a) generating means for combining the first and second outputs to generate a composite picture signal; and (b) control means for controlling such that DC levels of the first and second outputs input to said generating means substantially coincide with each other.
Claim 10
Dependent Claim
31 words
An apparatus according to claim 7, wherein said control means includes means for comparing the DC levels of the first and second outputs with predetermined levels and generating a comparison signal.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 8, wherein said control means controls the DC levels of the first and second outputs in response to the comparison signal.
Claim 12
Independent Claim
238 words
An apparatus comprising: (a) linear image sensor means having a plurality of photoelectric transducer elements arranged in one direction, said linear image sensor means being adapted to parallel output a first output from a plurality of odd-numbered ones of said photoelectric transducer elements and a second output from a plurality of even-numbered ones of said photoelectric transducer elements; (b) generating means for combining the first and second outputs to generate a composite picture signal; (c) control means for controlling such that DC levels of the first and second outputs input to said generating means substantially coincide with each other; (d) illuminating means for illuminating an object by light; (e) means for providing a relative displacement between said linear image sensor means and the object in a direction substantially perpendicular to the arranged direction of said plurality of photoelectric transducer elements; (f) means for detecting the relative displacement and generating a displacement detection signal whenever a predetermined displacement occurs between said linear image sensor means and the object; (g) exposure detecting means having light-receiving means for receiving light from said illuminating means, said exposure detecting means being adapted to detect an exposure of said light-receiving means upon illumination of light from said illuminating means in response to the displacement detection signal and to generate an exposure detection signal representing the detected exposure; and (h) normalizing means for normalizing said composite picture signal in response to the exposure detection signal.
Claim 13
Independent Claim
238 words
An apparatus comprising: (a) linear image sensor means having a plurality of photoelectric transducer elements arranged in one direction, said linear image sensor means being adapted to parallel output a first output from a plurality of odd-numbered ones of said photoelectric transducer elements and a second output from a plurality of even-numbered ones of said photoelectric transducer elements; (b) generating means for combining the first and second outputs to generate a composite picture signal; (c) control means for controlling such that DC levels of the first and second outputs input to said generating means substantially coincide with each other; (d) illuminating means for illuminating an object by light; (e) means for providing a relative displacement between said linear image sensor means and the object in a direction substantially perpendicular to the arranged direction of said plurality of photoelectric transducer elements; (f) means for detecting the relative displacement and generating a displacement detection signal whenever a predetermined displacement occurs between said linear image sensor means and the object; (g) exposure detecting means having light-receiving means for receiving light from said illuminating means, said exposure detecting means being adapted to detect an exposure of said light-receiving means upon illumination of light from said illuminating means in response to the displacement detection signal and to generate an exposure detection signal representing the detected exposure; and (h) normalizing means for normalizing said composite picture signal in response to the exposure detection signal.
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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |