CA1192999A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Smear reduction in solid state image pickup device camera
Assignee: Sony Corp
•
Filing: 1983-03-08
•
Granted: 1985-09-03
•
Expires: 2003-03-08
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A charge-coupled device (CCD) camera with a smear reducer circuit is disclosed, which includes a CCD for generating a pickup signal, a memory for storing an extracted smear signal from the pickup signal and, a level selector circuit for cutting off a noise contained in the smear signal with level less than a predetermined level in the smear signals from the memory. The output of this level selector circuit is subtracted from the pickup signal to thereby obtain a pickup signal with the smear reduced as well as a noise component suppressed.
Inventors
- 👤 Katsuro Miyata
- 👤 Takashi Asaida
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-08 16:39
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/60; H04N25/62; H04N25/625
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
A charge-coupled device camera in which a light shielding portion of a solid state image pickup device is used to detect a smear signal, said smear signal is stored in a memory means and a smear signal derived from said memory means is subtracted from a pickup signal to thereby perform a smear reducing operation, said charge-coupled device camera being characterized in that a level selector circuit means for selectively passing therethrough a smear signal of higher than a predetermined level is provided at the output side of said memory means.
Claim 2
Dependent Claim
91 words
A charge-coupled device camera in which a light shielding portion of a solid state image pickup device is used to detect a smear signal, said smear signal is stored in a memory means and a smear signal derived from said memory means is subtracted from a pickup signal to thereby perform a smear reducing operation, said charge-coupled device camera being characterized in that a level selector circuit means for selectively passing therethrough a smear signal of higher than a predetermined level is provided at the output side of said memory means.
Claim 3
Dependent Claim
19 words
A charge coupled device camera according to claim 1, wherein said level selector circuit means is a core circuit.
Claim 4
Dependent Claim
130 words
A charge-coupled device camera in which a light shielding portion of a solid state image pickup device is used to detect a smear signal, said smear signal is stored in a memory means and a smear signal derived from said memory means is subtracted from a pickup signal to thereby perform a smear reducing operation, said charge-coupled device camera being characterized by a low-pass filter means connected to an output side of said memory means, a subtracter means for subtracting an output of said low-pass filter means from an output of said memory means, a level selector circuit means connected to an output side of said subtracter means and an adder means for adding an output from said level selector circuit means with the output of said low-pass filter means.
Claim 5
Dependent Claim
130 words
A charge-coupled device camera in which a light shielding portion of a solid state image pickup device is used to detect a smear signal, said smear signal is stored in a memory means and a smear signal derived from said memory means is subtracted from a pickup signal to thereby perform a smear reducing operation, said charge-coupled device camera being characterized by a low-pass filter means connected to an output side of said memory means, a subtracter means for subtracting an output of said low-pass filter means from an output of said memory means, a level selector circuit means connected to an output side of said subtracter means and an adder means for adding an output from said level selector circuit means with the output of said low-pass filter means.
Claim 6
Dependent Claim
18 words
A charge-coupled device camera according to claim 3, wherein said level selector circuit means is a core circuit.
Claim 7
Dependent Claim
55 words
A charge-coupled device camera according to claim 1 further comprising a selector means connected to the output side of said level selector circuit means, said selector means being operated to select either of the out-put from said level selector circuit means and a predeter-mined D.C level in response to a leve1 of said smear signal.
Claim 8
Dependent Claim
49 words
A charge-coupled device camera according to claim 5, wherein said selector means detects a level of the smear signal from the output of said level selector circuit means and selects the output of said level selector circuit means when said level of the smear signal exceeds the predetermined level.
Claim 9
Dependent Claim
42 words
A charge-coupled device camera according to claim 1 further comprising a level varying means connected to the output side of said level selector circuit means, said level varying means varying said level of the smear signal from said level selector circuit means.
Claim 10
Dependent Claim
39 words
A charge-coupled device camera according to claim 7, wherein said level varying means detects the level of the smear signal from the output of said leval selector circuit means and is controlled by the level of said smear signal.
Claim 11
Dependent Claim
23 words
A charge-coupled device camera according to claim 1, wherein said solid state image pickup device is of a frame transfer-type charge-coupled device (CCD).
Claim 12
Dependent Claim
20 words
A charge-coupled device camera according to claim 1, wherein said solid state image pickup device is of an interline-type CCD.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.