US4597659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-focus state display device for camera
Assignee: Canon Inc
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Filing: 1984-05-23
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Granted: 1986-07-01
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Expires: 2004-05-23
Abstract
Abstract The disclosed camera includes a view finder whose visual field displays a mark indicative of a focused condition. A display which extinguishes the mark either immediately after the detection of the in-focus condition or a predetermined time after the detection of the in-focus state condition, and generates an audible or visual mark outside the view finder's visual field.
Inventors
- 👤 Yasuo Suda
- 👤 Kiyoshi Alyfuku
- 👤 Akio Sunouchi
- 👤 Nobuyuki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:10
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G03; G03B; G03B17/00; G03B17/18; G03B17/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
101 words
An in-focus display device for a camera, comprising: first detecting means for detecting a signal representing an in-focus state; first display means for displaying an in-focus state outside the visual field of a view finder in response to a signal from said first detecting means; second display means for displaying a mark indicative of an in-focus state within the view finder visual field in response to the signal from said first detecting means; and a control circuit for causing said first display means to effect an in-focus state display after the in-focus state display by said second display means is extinguished.
Claim 2
Dependent Claim
101 words
An in-focus display device for a camera, comprising: first detecting means for detecting a signal representing an in-focus state; first display means for displaying an in-focus state outside the visual field of a view finder in response to a signal from said first detecting means; second display means for displaying a mark indicative of an in-focus state within the view finder visual field in response to the signal from said first detecting means; and a control circuit for causing said first display means to effect an in-focus state display after the in-focus state display by said second display means is extinguished.
Claim 3
Dependent Claim
46 words
An in-focus state display device according to claim 1, wherein said control circuit includes: a first operation circuit for operating said first display means; and a second operation circuit for operating said second display means in response to a signal produced from said first operation circuit.
Claim 4
Dependent Claim
115 words
An in-focus state display device for a camera, comprising: detecting means for detecting a signal representing an in-focus state; visible display means for displaying a visible in-focus state within a view finder visual field in response to a signal produced from said first detecting means; audible informing means for indicating an in-focus state by means of a sound signal in response to the signal produced from said first detecting means; first operating means for operating said audible informing means; and changeover means for indicating the visible display means first when the in-focus condition is detected by said detecting means, and after a predetermined time putting off said visible display means to actuate said informing means.
Claim 5
Dependent Claim
115 words
An in-focus state display device for a camera, comprising: detecting means for detecting a signal representing an in-focus state; visible display means for displaying a visible in-focus state within a view finder visual field in response to a signal produced from said first detecting means; audible informing means for indicating an in-focus state by means of a sound signal in response to the signal produced from said first detecting means; first operating means for operating said audible informing means; and changeover means for indicating the visible display means first when the in-focus condition is detected by said detecting means, and after a predetermined time putting off said visible display means to actuate said informing means.
Claim 6
Dependent Claim
96 words
An in-focus display device for a camera, comprising: (a) detecting means for detecting a signal representative of an in-focus state; (b) first display means for displaying the in-focus state outside the visual field of a view finder in response to the signal from said detecting means: (c) second display means for displaying the in-focus state within the view finder visual field in response to the signal from said detecting means; and (d) a control circuit for inhibiting the operation of said second display means after a predetermined lapse of time from detection of said in-focus state.
Claim 7
Dependent Claim
96 words
An in-focus display device for a camera, comprising: (a) detecting means for detecting a signal representative of an in-focus state; (b) first display means for displaying the in-focus state outside the visual field of a view finder in response to the signal from said detecting means: (c) second display means for displaying the in-focus state within the view finder visual field in response to the signal from said detecting means; and (d) a control circuit for inhibiting the operation of said second display means after a predetermined lapse of time from detection of said in-focus state.
Claim 8
Dependent Claim
25 words
An in-focus display device according to claim 4, which further comprises a control circuit for actuating said first display means immediately in the in-focus state.
Claim 9
Dependent Claim
106 words
An in-focus state display device for a camera, comprising: (a)detecting means for detecting a signal representative of an in-focus state; (b) visible display means for displaying the in-focus state within a view finder visual field in response to the signal produced from said detecting means; (c) audible informing means for an in-focus state by means of a sound signal in response to the signal produced from said detecting means; (d) first operating means for operating said audible informing means; and (e) a control circuit means for inhibiting the operation of said visible display means after a predetermined lapse of time from detection of said in-focus state.
Claim 10
Dependent Claim
106 words
An in-focus state display device for a camera, comprising: (a)detecting means for detecting a signal representative of an in-focus state; (b) visible display means for displaying the in-focus state within a view finder visual field in response to the signal produced from said detecting means; (c) audible informing means for an in-focus state by means of a sound signal in response to the signal produced from said detecting means; (d) first operating means for operating said audible informing means; and (e) a control circuit means for inhibiting the operation of said visible display means after a predetermined lapse of time from detection of said in-focus state.
Claim 11
Dependent Claim
21 words
An in-focus displaying device according to claim 6, in which said first operating means is actuated immediately in the in-focus state.
Claim 12
Dependent Claim
99 words
An in-focus display apparatus for a camera, comprising: (a) detecting means for detecting a signal representative of an in-focus state; (b) first display means for displaying the in-focus state outside the visual field of a view finder after the in-focus state has been detected by the detecting means; (c) second display means for displaying the in-focus state within the view finder visual field in response to the signal from said detecting means; and (d) a control circuit means for inhibiting the operation of said second display means after a predetermined lapse of time from detection of said in-focus state.
Claim 13
Dependent Claim
99 words
An in-focus display apparatus for a camera, comprising: (a) detecting means for detecting a signal representative of an in-focus state; (b) first display means for displaying the in-focus state outside the visual field of a view finder after the in-focus state has been detected by the detecting means; (c) second display means for displaying the in-focus state within the view finder visual field in response to the signal from said detecting means; and (d) a control circuit means for inhibiting the operation of said second display means after a predetermined lapse of time from detection of said in-focus state.
Claim 14
Dependent Claim
95 words
An in-focus display apparatus for a camera, comprising: (a) detecting means for detecting a signal representative of an in-focus state; (b) visible display means for displaying the in-focus state within a view finder visual field in response to the signal from said detecting means; (c) audible informing means for indicating an in-focus state by means of s sound signal after the in-focus state has been detected by the detecting means; and (d) control means for inhibiting the operation of said visible display means after a predetermined lapse of time from detection of said in-focus state.
Claim 15
Dependent Claim
95 words
An in-focus display apparatus for a camera, comprising: (a) detecting means for detecting a signal representative of an in-focus state; (b) visible display means for displaying the in-focus state within a view finder visual field in response to the signal from said detecting means; (c) audible informing means for indicating an in-focus state by means of s sound signal after the in-focus state has been detected by the detecting means; and (d) control means for inhibiting the operation of said visible display means after a predetermined lapse of time from detection of said in-focus state.
References Cited (Backward Citations)
JPS54106225A
Cited
JPS55155337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |