Patent US4974003A successfully refreshed from Google Patents.
US4974003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera having an autofocus device
Assignee: Canon Inc
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Filing: 1989-07-06
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Granted: 1990-11-27
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Expires: 2009-07-06
Abstract
Abstract In a camera having an autofocus device, when performing a continuous shooting, an autofocus operation by the autofocus device is repeatedly performed during a time from the termination of the shooting operation to the completion of a preparation for the next shooting operation, and if the performance of the autofocus operation has been at least once completed before the completion of the preparation for the next shooting operation, the completion of the aforesaid preparation for the next shooting operation is, even though the autofocus operation is in progress, immediately followed by the start of the next shooting operation, while if the autofocus operation has not been at least once completed before the completion of the aforesaid preparation for the next shooting operation, the next shooting operation is started depending on the completion of the autofocus operation.
Inventors
- 👤 Ichiro Ohnuki
- 👤 Masayoshi Kiuchi
- 👤 Akira Akashi
- 👤 Terutake Kadohara
- 👤 Masaki Higashihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:49
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/02; G02B7/04; G02B7/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
184 words
A camera having a continuous shooting function in which at the end of each shooting operation, a preparing operation for a next shooting operation is performed, and in response to completion of the preparing operation for the next shooting operation, the next shooting operation is started, comprising: (a) autofocus device means for repeating an autofocus operation cycle at an end of the shooting operation; (b) judgment circuit means for determining whether the autofocus operation cycle has been performed a predetermined number of times as of completion of preparation for the next shooting operation, and (c) control circuit means for starting the next shooting operation when it is determined by said judgment circuit means that the autofocus operation has been performed the predetermined number of times as of the completion of the next shooting operation, and, when it is determined by said judgment circuit means that the autofocus operation has not been performed the predetermined number of times as of the completion of the next shooting operation, for delaying the start of the next shooting operation until completion of the autofocus operation then being performed.
Claim 2
Dependent Claim
184 words
A camera having a continuous shooting function in which at the end of each shooting operation, a preparing operation for a next shooting operation is performed, and in response to completion of the preparing operation for the next shooting operation, the next shooting operation is started, comprising: (a) autofocus device means for repeating an autofocus operation cycle at an end of the shooting operation; (b) judgment circuit means for determining whether the autofocus operation cycle has been performed a predetermined number of times as of completion of preparation for the next shooting operation, and (c) control circuit means for starting the next shooting operation when it is determined by said judgment circuit means that the autofocus operation has been performed the predetermined number of times as of the completion of the next shooting operation, and, when it is determined by said judgment circuit means that the autofocus operation has not been performed the predetermined number of times as of the completion of the next shooting operation, for delaying the start of the next shooting operation until completion of the autofocus operation then being performed.
Claim 3
Dependent Claim
14 words
A camera according to claim 1, wherein said predetermined number of times is once.
Claim 4
Dependent Claim
155 words
A camera having a continuous shooting function in which at the end of each shooting operation, a preparing operation for the next shooting operation is performed, and in response to completion of the preparing operation for the next shooting operation, the next shooting operation is started, comprising: (a) autofocus device means for repeating an autofocus operation cycle at an end of the shooting operation; (b) judgment circuit means for determining whether the autofocus device means has performed at least one cycle as of completion of the preparation of the next shooting operation, and if at least one cycle is performed, outputs a first signal, and if at least one cycle is not performed, outputs a second signal; and (c) control circuit means for starting the next shooting operation in response to said first signal and, when said second signal is output starts the next shooting operation in response to completion of the autofocus operation cycle.
Claim 5
Dependent Claim
155 words
A camera having a continuous shooting function in which at the end of each shooting operation, a preparing operation for the next shooting operation is performed, and in response to completion of the preparing operation for the next shooting operation, the next shooting operation is started, comprising: (a) autofocus device means for repeating an autofocus operation cycle at an end of the shooting operation; (b) judgment circuit means for determining whether the autofocus device means has performed at least one cycle as of completion of the preparation of the next shooting operation, and if at least one cycle is performed, outputs a first signal, and if at least one cycle is not performed, outputs a second signal; and (c) control circuit means for starting the next shooting operation in response to said first signal and, when said second signal is output starts the next shooting operation in response to completion of the autofocus operation cycle.
Claim 6
Dependent Claim
79 words
A camera according to claim 3, wherein said autofocus operation includes a focus detecting operation performed by a focus detecting circuit and a lens driving operation based on a result of said focus detecting operation and performed by a lens drive circuit, wherein said focus detecting operation and said lens driving operation constitute one cycle of autofocus operation, and wherein one cycle of autofocus operation is completed by the completion of said lens driving operation in said one cycle.
Claim 7
Dependent Claim
54 words
A camera according to claim 4, further comprising a film transport circuit for, after the end of each shooting operation, transporting film by one frame and wherein the preparing operation of the next shooting operation is completed by the completion of a film transporting operation by one frame performed by said film transport circuit.
Claim 8
Dependent Claim
56 words
A camera according to claim 5, further comprising a detecting circuit for detecting the film transporting operation performed by said film transport circuit and for producing, when detecting the completion of the film transporting operation by one frame, a film transport completion signal indicative of the completion of the preparing operation for the next shooting operation.
Claim 9
Dependent Claim
195 words
A camera having a continuous shooting function in which at the end of each shooting operation, a preparing operation for a next shooting operation is performed, and in response to completion of the preparing operation for the next shooting operation, the next shooting operation is started, comprising: (a) autofocus device means for repeating an autofocus operation cycle at an end of the shooting operation; (b) judgment circuit means for determining whether the autofocus device means has performed a predetermined number of cycles as of completion of the preparation of the next shooting operation, and if a predetermined number of cycles are performed, outputs a first signal, and if a predetermined number of cycles are not performed, outputs a second signal; (c) control circuit means for starting the next shooting operation in response to said first signal and, for delaying the next shooting operation until completion of the autofocus operation cycle in response to said second signal; and (d) autofocus operation stopping circuit means for stopping the autofocus operation in response to said first signal and, when said second signal is output, for stopping the autofocus operation in response to completion of said autofocus operation cycle.
Claim 10
Dependent Claim
195 words
A camera having a continuous shooting function in which at the end of each shooting operation, a preparing operation for a next shooting operation is performed, and in response to completion of the preparing operation for the next shooting operation, the next shooting operation is started, comprising: (a) autofocus device means for repeating an autofocus operation cycle at an end of the shooting operation; (b) judgment circuit means for determining whether the autofocus device means has performed a predetermined number of cycles as of completion of the preparation of the next shooting operation, and if a predetermined number of cycles are performed, outputs a first signal, and if a predetermined number of cycles are not performed, outputs a second signal; (c) control circuit means for starting the next shooting operation in response to said first signal and, for delaying the next shooting operation until completion of the autofocus operation cycle in response to said second signal; and (d) autofocus operation stopping circuit means for stopping the autofocus operation in response to said first signal and, when said second signal is output, for stopping the autofocus operation in response to completion of said autofocus operation cycle.
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) | 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 |