Patent US4974013A successfully refreshed from Google Patents.
US4974013A
Expired / Lapsed
US
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Camera having an exposure compensation information setting operation member
Assignee: Canon Inc
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Filing: 1989-06-23
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Granted: 1990-11-27
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Expires: 2009-06-23
Abstract
Abstract A camera has an exposure compensation information setting operation member for manually setting an exposure compensation value in which even if the release operation member lies in an inoperative state when the exposure compensation value is set by the setting operation member, the light measuring, computing and displaying operations are caused to be performed in response to an operation of the setting operation member, thereby making it possible to confirm the variation of the computer value based on the set compensation value.
Inventors
- 👤 Toshifumi Ohsawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:38
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B7/00; G03B7/08; G03B7/091; G03B7/097
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A camera comprising: (a) a light measuring circuit; (b) a computing circuit for computing exposure on the basis of an output from said light measuring circuit and a set compensation information; (c) an exposure compensation information setting operation member for setting said compensation information; (d) a display circuit for displaying both an exposure information corresponding to an output of said computing circuit and said set compensation information simultaneously; (e) a release operation member which, when in a first operation state, brings said light measuring circuit, said computing circuit and said display circuit into an operative state; and (f) a control circuit which brings said light measuring circuit, said computing circuit and said display circuit into an operative state by the operation of said setting member independently from the operation of said release operation member.
Claim 2
Dependent Claim
134 words
A camera comprising: (a) a light measuring circuit; (b) a computing circuit for computing exposure on the basis of an output from said light measuring circuit and a set compensation information; (c) an exposure compensation information setting operation member for setting said compensation information; (d) a display circuit for displaying both an exposure information corresponding to an output of said computing circuit and said set compensation information simultaneously; (e) a release operation member which, when in a first operation state, brings said light measuring circuit, said computing circuit and said display circuit into an operative state; and (f) a control circuit which brings said light measuring circuit, said computing circuit and said display circuit into an operative state by the operation of said setting member independently from the operation of said release operation member.
Claim 3
Dependent Claim
40 words
A camera according to claim 1, further comprising a preset circuit for manually presetting a shutter or aperture value, and wherein said computing circuit performs the exposure computation on the basis of the present value set by said preset circuit.
Claim 4
Dependent Claim
59 words
A camera according to claim 1, further comprising a timer circuit, wherein said control circuit maintains said light measuring circuit, said computing circuit and said display circuit for a time restricted by said timer circuit even if said first operation state of said release operation member is released or the operation of said information setting operation member is released.
Claim 5
Dependent Claim
74 words
A camera according to claim 1, wherein said exposure compensation information setting operation member includes a first operation member for setting an exposure compensation mode and a second operation member for setting a compensation value when operated under the condition that the compensation mode has been set by said first operation member, and wherein said control circuit operates in response to a setting operation of said first operation member for setting the compensation mode.
Claim 6
Dependent Claim
150 words
A camera comprising: (a) a light measuring circuit; (b) a computing circuit for computing exposure on the basis of an output from said light measuring circuit and a set compensation information; (c) an exposure compensation information setting operation member for setting said compensation information; (d) a display circuit for displaying both an exposure information corresponding to an output of said computing circuit and said set compensation information simultaneously; (e) a release operation member; and (f) a control circuit which, when said release operation member is in an operative state, brings said light measuring circuit, said computing circuit and said display circuit into an operative state, when said information setting operation member is operated independently from the operation of said release operation member, and brings said light measuring circuit, said computing circuit and said display circuit into a non-operative state when the operation of said information setting operation member is released.
Claim 7
Dependent Claim
150 words
A camera comprising: (a) a light measuring circuit; (b) a computing circuit for computing exposure on the basis of an output from said light measuring circuit and a set compensation information; (c) an exposure compensation information setting operation member for setting said compensation information; (d) a display circuit for displaying both an exposure information corresponding to an output of said computing circuit and said set compensation information simultaneously; (e) a release operation member; and (f) a control circuit which, when said release operation member is in an operative state, brings said light measuring circuit, said computing circuit and said display circuit into an operative state, when said information setting operation member is operated independently from the operation of said release operation member, and brings said light measuring circuit, said computing circuit and said display circuit into a non-operative state when the operation of said information setting operation member is released.
Claim 8
Dependent Claim
74 words
A camera according to claim 5, wherein said exposure compensation information setting operation member includes a first operation member for setting an exposure compensation mode and a second operation member for setting a compensation value when operated under the condition that the compensation mode has been set by said first operation member, and wherein said control circuit operates in response to a setting operation of said first operation member for setting the compensation mode.
Claim 9
Dependent Claim
98 words
A camera comprising: (a) a light measuring circuit; (b) a computing circuit for computing exposure on the basis of an output from said light measuring circuit and a set correction information; (c) an exposure correction information setting operation member for setting said correction information; (d) a display circuit for displaying both an exposure information corresponding to an output of said computing circuit and said set correction information simultaneously; and (e) a control circuit which brings said light measuring circuit, said computing circuit and said display circuit into an operative state by the operation of said setting operation member.
Claim 10
Dependent Claim
98 words
A camera comprising: (a) a light measuring circuit; (b) a computing circuit for computing exposure on the basis of an output from said light measuring circuit and a set correction information; (c) an exposure correction information setting operation member for setting said correction information; (d) a display circuit for displaying both an exposure information corresponding to an output of said computing circuit and said set correction information simultaneously; and (e) a control circuit which brings said light measuring circuit, said computing circuit and said display circuit into an operative state by the operation of said setting operation member.
References Cited (Backward Citations)
US4763144A
Cited
US4653893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |