Patent US4868642A successfully refreshed from Google Patents.
US4868642A
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US
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Apparatus for displaying an image on a video monitor corresponding to an image being photographed
Assignee: Fujifilm Corp
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Filing: 1988-05-17
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Granted: 1989-09-19
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Expires: 2008-05-17
Abstract
Abstract A video camera is arranged adjacent to a master camera with a silver halide film so as to pick up an image of the same subject as that to be taken by the maser camera. The video signals of a plurality of fields supplied from the video camera are stored in a memory. The video signals of fields of a predetermined number corresponding to the memory capacity are stored in such manner that a new input video signal is stored with erasing the oldest video signal stored therein. The video signal delayed by a predetermined fields from the oldest video signal stored in the memory is read out to supply the read out signal to a video monitor device. Responsive to a full-open signal input of a shutter in the master camera during a period after resetting, the storing operation is stopped at a predetermined timing around the input of the full-open signal, and specified video signals are read out from the memory other than that of the field for the full-open signal to send the read out signal to the video monitor device for displaying a still image.
Inventors
- 👤 Kiyotaka Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:13
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/21; H04N1/2104; H04N1/2112; H04N1/2116; H04N1/00127; H04N1/00281; H04N1/00283; H04N23/00; H04N23/60; H04N2101/00; H04N2201/00; H04N2201/0077
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
248 words
A still image recording apparatus for controlling mutual operations of a master camera device using a silver halide film for photographing a subject image, a video camera device, arranged adjacent to said master camera, for filming the subject image and a video monitor device for viewing the subject image being filmed by the video camera device, the apparatus comprising: memory means for storing video signals of the subject image corresponding to a plurality of fields supplied from the video camera device; means for storing said video signals of a predetermined number of fields in said memory means so that a new input video signal is stored by writing over said video signals stored in said memory means; means for reading out said video signals from said memory means before writing said new input video signal into said memory, said video signals being offset from said new input video signal by said predetermined number of fields; means for supplying said video signals read out from said memory means to said video monitor device; means for stopping said means for storing said video signals responsive to developing a full-open signal representing a full-open state of a shutter in said master camera for a period of time; means for repeatedly reading out said fields of said video signals from the memory means other than one of said fields corresponding to said full-open signal; and means for sending said fields from said means for repeatedly reading out to said video monitor device.
Claim 2
Dependent Claim
248 words
A still image recording apparatus for controlling mutual operations of a master camera device using a silver halide film for photographing a subject image, a video camera device, arranged adjacent to said master camera, for filming the subject image and a video monitor device for viewing the subject image being filmed by the video camera device, the apparatus comprising: memory means for storing video signals of the subject image corresponding to a plurality of fields supplied from the video camera device; means for storing said video signals of a predetermined number of fields in said memory means so that a new input video signal is stored by writing over said video signals stored in said memory means; means for reading out said video signals from said memory means before writing said new input video signal into said memory, said video signals being offset from said new input video signal by said predetermined number of fields; means for supplying said video signals read out from said memory means to said video monitor device; means for stopping said means for storing said video signals responsive to developing a full-open signal representing a full-open state of a shutter in said master camera for a period of time; means for repeatedly reading out said fields of said video signals from the memory means other than one of said fields corresponding to said full-open signal; and means for sending said fields from said means for repeatedly reading out to said video monitor device.
Claim 3
Dependent Claim
176 words
A still recording apparatus comprising: video camera means for recording a subject image and developing video signals of said subject image; master camera means for photographing a still image of said subject image; video monitoring means for displaying video signals from said video camera means; and video monitoring control means for controlling said video signals being displayed on said video monitoring means including, memory means for storing said video signals in a predetermined number of fields and storing new video signals in said memory means by writing over said fields of said video signals previously stored, reading means for reading said fields of said video signals from said memory means before storing said new video signals in said memory means and repeatedly reading said fields of said video signals other than of said fields corresponding to a full-open signal developed for a predetermined period of time in response to a full-open state of a shutter in said master camera means, and supplying means for supplying said fields of said video signals to said video monitoring means.
Claim 4
Dependent Claim
176 words
A still recording apparatus comprising: video camera means for recording a subject image and developing video signals of said subject image; master camera means for photographing a still image of said subject image; video monitoring means for displaying video signals from said video camera means; and video monitoring control means for controlling said video signals being displayed on said video monitoring means including, memory means for storing said video signals in a predetermined number of fields and storing new video signals in said memory means by writing over said fields of said video signals previously stored, reading means for reading said fields of said video signals from said memory means before storing said new video signals in said memory means and repeatedly reading said fields of said video signals other than of said fields corresponding to a full-open signal developed for a predetermined period of time in response to a full-open state of a shutter in said master camera means, and supplying means for supplying said fields of said video signals to said video monitoring means.
Claim 5
Dependent Claim
18 words
The still image recording apparatus of claim 2, wherein said memory means comprises a plurality of memory portions.
Claim 6
Dependent Claim
17 words
The still image recording apparatus of claim 2, wherein said master camera means uses silver halide film.
Claim 7
Independent Claim
161 words
A method for controlling a display subject image being photographed by a master camera on a video monitor device, comprising the steps of: storing video signals corresponding to the subject image in a predetermined number of fields of a memory; reading said video signals from said memory for display on the video monitor device; writing new video signals of the subject image over said video signals previously stored in said fields of said memory; displaying said video signals previously stored on the video monitor device; photographing the subject image in response to a full-open state of a shutter in the master camera; preventing said writing of said new video signals into said memory for a predetermined period of time; repeatedly reading said fields of said video signals from said memory other than one of said fields corresponding to said full-open state for said predetermined period of time; and displaying said fields repeatedly read from said memory on the video display device.
Claim 8
Independent Claim
161 words
A method for controlling a display subject image being photographed by a master camera on a video monitor device, comprising the steps of: storing video signals corresponding to the subject image in a predetermined number of fields of a memory; reading said video signals from said memory for display on the video monitor device; writing new video signals of the subject image over said video signals previously stored in said fields of said memory; displaying said video signals previously stored on the video monitor device; photographing the subject image in response to a full-open state of a shutter in the master camera; preventing said writing of said new video signals into said memory for a predetermined period of time; repeatedly reading said fields of said video signals from said memory other than one of said fields corresponding to said full-open state for said predetermined period of time; and displaying said fields repeatedly read from said memory on the video display device.
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) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |