Patent DE291925C successfully refreshed from Google Patents.
US5504584A
Expired / Lapsed
US
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Video movie camera capable of still photography using a stroboscopic flash
Assignee: Fujifilm Corp
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Filing: 1992-01-28
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Granted: 1996-04-02
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Expires: 2012-01-28
Abstract
Abstract The present invention relates to a video camera having a stroboscopic flash, and a method of photographing a subject with the video tape recorder. The video camera includes a strobe device for illuminating the subject with a flashing light, a movie photographing trigger serving as a movie photographing button, a still photographing trigger for initiating still photography, an image processing unit for energizing the movie photographing trigger so as to measure light quantity from the subject during a movie photography operation, and a control unit for determining based on information about the light quantity measured by the image processing unit whether or not strobe photography is required during a still photography operation. According to the above construction, the strobe photography can automatically and immediately be performed upon the still photography operation when the still photography is initiated in the course of the movie photography. When it is desired to still-photograph the subject with the automatic flashing light of the strobe device, the level at which the strobe device has been charged can reliably be confirmed by using a display unit in a viewfinder.
Inventors
- 👤 Haruo Soeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:02
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/70; H04N23/74; H04N23/60; H04N23/63; H04N23/633; H04N23/634; Y; Y10; Y10S; Y10S358/00; Y10S358/906
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A video camera, for producing a video movie signal of a subject during movie photography, having an iris controlled on the basis of detected brightness of the subject, said video movie signal being processed and recorded on a recording medium, the video camera being capable of recording still photography on said recording medium during movie photography using a stroboscopic flash, the video camera comprising: strobe means for generating the stroboscopic flash and having charging means for electrically charging said strobe means; charging control means for automatically controlling said charging means to charge said strobe means when the brightness of the subject detected during movie photography is low; and still photography trigger signal generating means for controlling the video camera to record the still photography on said recording medium using a stroboscopic flash when charging of said strobe means has been completed.
Claim 2
Dependent Claim
141 words
A video camera, for producing a video movie signal of a subject during movie photography, having an iris controlled on the basis of detected brightness of the subject, said video movie signal being processed and recorded on a recording medium, the video camera being capable of recording still photography on said recording medium during movie photography using a stroboscopic flash, the video camera comprising: strobe means for generating the stroboscopic flash and having charging means for electrically charging said strobe means; charging control means for automatically controlling said charging means to charge said strobe means when the brightness of the subject detected during movie photography is low; and still photography trigger signal generating means for controlling the video camera to record the still photography on said recording medium using a stroboscopic flash when charging of said strobe means has been completed.
Claim 3
Dependent Claim
41 words
The video camera according to claim 1, further comprising: determining means, coupled to said charging control means, for determining in accordance with the brightness of the subject whether strobe photography is needed, wherein a stroboscopic flash is used during still photography.
Claim 4
Dependent Claim
37 words
The video camera according to claim 2, further comprising: display means for displaying thereon a level of charging of said strobe means together with a photographed image when said determining means determines that strobe photography is needed.
Claim 5
Dependent Claim
30 words
The video camera according to claim 1, wherein said charging control means instructs said strobe means to initiate a charging operation based on charging current supplied to said charging means.
Claim 6
Dependent Claim
18 words
The video camera according to claim 3, wherein said display means comprises viewfinder means and character generating means.
Claim 7
Dependent Claim
63 words
The video camera according to claim 3 or 5, wherein said display means displays in said viewfinder means one of two charging levels indicative of minimum and maximum levels represented by EMPTY abbreviated as "E" and FULL abbreviated as "F", and the level of charging of said strobe means is represented according to a rate of areas divided within a given graphic pattern.
Claim 8
Dependent Claim
36 words
The video camera according to claim 3 or 5, wherein said display means is activated to visually indicate a mark by flashing of light in said viewfinder means when said strobe means has been fully charged.
Claim 9
Dependent Claim
34 words
The video camera according to claim 3 or 5, wherein said display means is activated to digitally indicate in said viewfinder means a level of charging of said strobe means in terms of percentage.
Claim 10
Dependent Claim
43 words
The video camera according to claim 3 or 5, wherein said display means is activated to successively visually indicate triple circles by flashing of light in said viewfinder means in accordance with an increase in a level of charging of said strobe means.
Claim 11
Dependent Claim
150 words
A video camera, for producing a video movie signal of a subject during movie photography, having an iris controlled on the basis of detected brightness of the subject, said video movie signal being processed and recorded on a recording medium, the video camera being capable of recording still photography on said recording medium during movie photography using a stroboscopic flash generated by strobe means, the video camera comprising: first means for generating a movie-photography trigger signal to initiate a movie photography operation; second means, coupled to said first means, for automatically detecting the brightness of light reflected from the subject when movie photography is performed; third means for determining whether strobe photography is needed at the time of still photography operation in accordance with the detected brightness of the subject; and fourth means for initiating charging of the strobe means when said third means determines that strobe photography is needed.
Claim 12
Dependent Claim
150 words
A video camera, for producing a video movie signal of a subject during movie photography, having an iris controlled on the basis of detected brightness of the subject, said video movie signal being processed and recorded on a recording medium, the video camera being capable of recording still photography on said recording medium during movie photography using a stroboscopic flash generated by strobe means, the video camera comprising: first means for generating a movie-photography trigger signal to initiate a movie photography operation; second means, coupled to said first means, for automatically detecting the brightness of light reflected from the subject when movie photography is performed; third means for determining whether strobe photography is needed at the time of still photography operation in accordance with the detected brightness of the subject; and fourth means for initiating charging of the strobe means when said third means determines that strobe photography is needed.
Claim 13
Independent Claim
167 words
A method of photographing a subject with a video camera which produces a video movie signal of a subject during movie photography and has an iris controlled on the basis of a detected brightness of the subject, the video movie signal being processed and recorded on a recording medium, the video camera being capable of recording still photography on the recording medium during movie photography using a stroboscopic flash generated by strobe means, the method of photographing comprising the steps of: generating a movie-photography trigger signal to initiate a movie photography operation; automatically detecting the brightness of light reflected from the subject when the movie photography operation is being carried out; determining whether strobe photography is required at the time of still photography operation in accordance with the detected brightness of the subject; initiating charging of the strobe means when it is determined in said determining step that strobe photography is needed; and displaying a level of charging of the strobe means together with a photographed image.
Claim 14
Independent Claim
167 words
A method of photographing a subject with a video camera which produces a video movie signal of a subject during movie photography and has an iris controlled on the basis of a detected brightness of the subject, the video movie signal being processed and recorded on a recording medium, the video camera being capable of recording still photography on the recording medium during movie photography using a stroboscopic flash generated by strobe means, the method of photographing comprising the steps of: generating a movie-photography trigger signal to initiate a movie photography operation; automatically detecting the brightness of light reflected from the subject when the movie photography operation is being carried out; determining whether strobe photography is required at the time of still photography operation in accordance with the detected brightness of the subject; initiating charging of the strobe means when it is determined in said determining step that strobe photography is needed; and displaying a level of charging of the strobe means together with a photographed image.
References Cited (Backward Citations)
US5202798A
Cited
US4746988A
Cited
US4827332A
Cited
US4825290A
Cited
US4943867A
Cited
US4788565A
Cited
US4937673A
Cited
US4829384A
Cited
US4829383A
Cited
US5189524A
Cited
US5218451A
Cited
US5229856A
Cited
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| 7.5 Years (Year 8) | 2003-04-02 | 2003-10-02 | 2004-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-02 | 2007-10-02 | 2008-04-02 | $7700.00 | Window Closed / Lapsed |