US4918538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic photography system with still and motion picture modes
Assignee: Canon Inc
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Filing: 1987-10-23
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Granted: 1990-04-17
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Expires: 2007-10-23
Abstract
Abstract An electronic still/motion picture photography system including an optical-electronic transducer for producing electrical signals responsive to an optical image, a light information control member, such as a diaphragm, for controlling the state of light information incident on the transducer, a discriminating circuit for discriminating the state of light information as it is controlled by the light information control member, a drive source responsive to the output of the discriminating circuit for driving the light information control member, a recorder for recording the output of the transducer, an indicating switch for indicating the amount of output representing the exposed image to be recorded by the recorder, and a operating circuit responsive to the output of the indicating switch for changing the driving characteristics of the drive source.
Inventors
- 👤 Syuichiro Saito
- 👤 Tadashi Okino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
G; G11; G11B; G11B31/00; G11B31/006; H; H04; H04N; H04N23/00; H04N23/70; H04N1/00; H04N1/40; H04N1/40056; F; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y10; Y10S; Y10S358/00; Y10S358/906
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
176 words
A photography system comprising: (a) a displacing member for an aperture member having an opening size which varies as the displacing member moves; (b) light receiving means for producing a signal responsive to an amount of light passing through said aperture member; (c) detecting means for detecting a movement speed of said displacing member; (d) operating means for operating to create an output of said detecting means and an output of said light receiving means; (e) drive means responsive to an output of said operating means for moving said displacing member; (f) mode control means for controlling an operation mode in which said operating means operates so as to vary a movement speed of said aperture member; (g) picture information recording means for generating picture information responsive to the light passing through said aperture member and for recording said picture information; and (h) indicating means for indicating an amount of said picture information to be recorded by said picture information recording means, the operation mode being changed depending upon an indication state of said indicating means.
Claim 2
Dependent Claim
176 words
A photography system comprising: (a) a displacing member for an aperture member having an opening size which varies as the displacing member moves; (b) light receiving means for producing a signal responsive to an amount of light passing through said aperture member; (c) detecting means for detecting a movement speed of said displacing member; (d) operating means for operating to create an output of said detecting means and an output of said light receiving means; (e) drive means responsive to an output of said operating means for moving said displacing member; (f) mode control means for controlling an operation mode in which said operating means operates so as to vary a movement speed of said aperture member; (g) picture information recording means for generating picture information responsive to the light passing through said aperture member and for recording said picture information; and (h) indicating means for indicating an amount of said picture information to be recorded by said picture information recording means, the operation mode being changed depending upon an indication state of said indicating means.
Claim 3
Dependent Claim
36 words
A system according to claim 1, further comprising: co-ordinating means for co-ordinating said indicating means and said mode control means so that said operation mode is changed depending upon an indicating state of said indicating means.
Claim 4
Dependent Claim
132 words
A photography system comprising: (a) an aperture member having an opening size which varies as a displacing member moves; (b) light receiving means for forming a signal responsive to an amount of light passing through said aperture member; (c) drive means responsive to an output of said light receiving means for moving said displacing member; (d) mode control means for changing a movement speed of said displacing member; and (e) picture information recording means for generating picture information responsive to the light passing through said aperture member and for recording said picture information; and (f) indicating means for indicating an amount of said picture information to be recorded by said picture information recording means, said movement speed of said displacing member being changed depending upon an indicating state of said indicating means.
Claim 5
Dependent Claim
132 words
A photography system comprising: (a) an aperture member having an opening size which varies as a displacing member moves; (b) light receiving means for forming a signal responsive to an amount of light passing through said aperture member; (c) drive means responsive to an output of said light receiving means for moving said displacing member; (d) mode control means for changing a movement speed of said displacing member; and (e) picture information recording means for generating picture information responsive to the light passing through said aperture member and for recording said picture information; and (f) indicating means for indicating an amount of said picture information to be recorded by said picture information recording means, said movement speed of said displacing member being changed depending upon an indicating state of said indicating means.
Claim 6
Dependent Claim
42 words
A system according to claim 3, further comprising: means for co-ordinating said indicating means and said mode control means so as to change the movement speed of said displacing member to a value depending upon an indicated state of said indicating means.
Claim 7
Dependent Claim
151 words
A diaphrgam control device comprising: (a) an aperture member having an opening size which varies as a displacing member moves; (b) light receiving means for forming a signal responsive to an amount of light passing through said aperture member; (c) detecting means for detecting a movement speed of said displacing member; (d) operating means for operating on an output of said detecting means and an output of aid light receiving means; (e) drive means responsive to an output of said operation means for moving said displacing member; (f) mode control means for controlling an operation mode in said operating means so as to vary responsiveness of said aperture member to the output of said light receiving means; and (g) indicating means for indicating an amount of picture information to be recorded by picture information recording means, the operation mode being changed in dependence upon an indicating state of said indicating means.
Claim 8
Dependent Claim
151 words
A diaphrgam control device comprising: (a) an aperture member having an opening size which varies as a displacing member moves; (b) light receiving means for forming a signal responsive to an amount of light passing through said aperture member; (c) detecting means for detecting a movement speed of said displacing member; (d) operating means for operating on an output of said detecting means and an output of aid light receiving means; (e) drive means responsive to an output of said operation means for moving said displacing member; (f) mode control means for controlling an operation mode in said operating means so as to vary responsiveness of said aperture member to the output of said light receiving means; and (g) indicating means for indicating an amount of picture information to be recorded by picture information recording means, the operation mode being changed in dependence upon an indicating state of said indicating means.
Claim 9
Dependent Claim
14 words
A devive according to claim 5, wherein said drive means includes an electric motor.
Claim 10
Dependent Claim
13 words
A device according to claim 6, wherein said displacing member includes a rotor.
Claim 11
Dependent Claim
30 words
A device according to claim 5, wherein said operating means includes a subtraction circuit for subtracting the output of said detecting means and the output of said light receiving means.
Claim 12
Dependent Claim
29 words
A device according to claim 5, wherein said mode control means controls a ratio between the output of said light receiving means and an output of said detecting means.
Claim 13
Dependent Claim
19 words
A device according to claim 5, wherein said mode control means controls a frequency characteristic of said operating means.
Claim 14
Dependent Claim
42 words
A device according to claim 5, further comprising: operating means receptive to the output of said light receiving means for producing an output which is applied to said drive means so that the output of said light receiving means is maintained constant.
Claim 15
Dependent Claim
106 words
A diaphragm control device comprising: (a) an aperture member having an opening size which varies as a displacing member moves; (b) light receiving means for producing a signal responsive to an amount of light passing through said aperture member; (c) drive means responsive to an output of said light receiving means for moving said displacing member; (d) indicating means for indicating an amount of picture information to be recorded by picture information recording means; and (e) mode control means for changing a movement speed of said displacing member in response to an output of said light receiving means and an indicating state of said indicating means.
Claim 16
Dependent Claim
106 words
A diaphragm control device comprising: (a) an aperture member having an opening size which varies as a displacing member moves; (b) light receiving means for producing a signal responsive to an amount of light passing through said aperture member; (c) drive means responsive to an output of said light receiving means for moving said displacing member; (d) indicating means for indicating an amount of picture information to be recorded by picture information recording means; and (e) mode control means for changing a movement speed of said displacing member in response to an output of said light receiving means and an indicating state of said indicating means.
Claim 17
Dependent Claim
14 words
A device according to claim 12, wherein said drive means includes an electric motor.
Claim 18
Dependent Claim
13 words
A device according to claim 13, wherein said displacing member includes a rotor.
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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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |