US4463384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television camera
Assignee: Canon Inc
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Filing: 1983-02-18
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Granted: 1984-07-31
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Expires: 2003-02-18
Abstract
Abstract A television camera having a photo-taking lens, an image pick-up device to take an image of a photographic object formed on its image pick-up surface by the photo-taking lens, a synchronous signal generator to control operations of the pick-up device, and an electronic view finder which displays the photographic object image based on an image pick-up signal obtained by the pick-up device. In this type of camera, there are further provided a detecting device to detect a focussed state of the photographic object image formed on the above-mentioned image pick-up surface, and a pattern generator to generate a pattern signal corresponding to the detected state. On the basis of the synchronous signal from the above-mentioned synchronous signal generator, an output from the pattern generator can be displayed at a predetermined position on the image surface of the above-mentioned electronic view finder.
Inventors
- 👤 Kenji Fujikawa
- 👤 Ryusho Hirose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:52
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/63; H04N23/633; H04N23/67; H04N23/671
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
A television camera comprising: an image pick-up device for providing a video signal, said device having an image pick-up surface; an object lens for forming an image of an object on the image pick-up surface, and means for adjusting said object lens to provide the image in a focused state on the image pick-up device; an electronic display device for displaying the image video signal; means for generating a video output signal representing the focus state of said image formed on the image pick-up surface; and means for applying said generated video output signal to said electronic display device for display with said image video signal.
Claim 2
Dependent Claim
106 words
A television camera comprising: an image pick-up device for providing a video signal, said device having an image pick-up surface; an object lens for forming an image of an object on the image pick-up surface, and means for adjusting said object lens to provide the image in a focused state on the image pick-up device; an electronic display device for displaying the image video signal; means for generating a video output signal representing the focus state of said image formed on the image pick-up surface; and means for applying said generated video output signal to said electronic display device for display with said image video signal.
Claim 3
Dependent Claim
115 words
A television camera comprising: an image forming means for forming a light image of an object; an image pick-up means for receiving thereon the object image formed by said image forming means and for providing a video signal corresponding to said image; an electronic display means for electronically displaying the video signal to reproduce said image; a focus detecting means for detecting the state of focus of the image formed on said image pick-up means, and for producing an output signal corresponding to said focus state; and means coupled from said focus detecting means to said electronic display means for providing a display of said output signal corresponding to said focus state of the image.
Claim 4
Dependent Claim
115 words
A television camera comprising: an image forming means for forming a light image of an object; an image pick-up means for receiving thereon the object image formed by said image forming means and for providing a video signal corresponding to said image; an electronic display means for electronically displaying the video signal to reproduce said image; a focus detecting means for detecting the state of focus of the image formed on said image pick-up means, and for producing an output signal corresponding to said focus state; and means coupled from said focus detecting means to said electronic display means for providing a display of said output signal corresponding to said focus state of the image.
Claim 5
Dependent Claim
99 words
A television camera comprising: a photographic lens; an image pick-up device for converting an image object, viewed through said lens, to produce a video signal; an electronic view finder for displaying the video signal; means for detecting the distance of said image pick-up device from the viewed object; means for detecting the in-focus object distance condition of said lens; means for comparing the detected distance of said image pick-up device from the viewed object and the detected in-focus object distance condition of said lens; and means for adjusting said lens, in response to a signal from said comparing means.
Claim 6
Dependent Claim
99 words
A television camera comprising: a photographic lens; an image pick-up device for converting an image object, viewed through said lens, to produce a video signal; an electronic view finder for displaying the video signal; means for detecting the distance of said image pick-up device from the viewed object; means for detecting the in-focus object distance condition of said lens; means for comparing the detected distance of said image pick-up device from the viewed object and the detected in-focus object distance condition of said lens; and means for adjusting said lens, in response to a signal from said comparing means.
References Cited (Backward Citations)
US3435136A
Cited
JPS522118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |