US4862277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging device with hand wobble display circuit
Assignee: NEC Home Electronics Ltd
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Filing: 1988-09-29
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Granted: 1989-08-29
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Expires: 2008-09-29
Abstract
Abstract An imaging device such as a video camera having a viewfinder for displaying an imaging signal to the photographer which indicates the degree of hand wobble (i.e., movement of the camera by the photographer). A hand wobble display circuit generates this imaging signal for the viewfinder by generating a field-difference or a frame-difference signal of the electronic viewfinder signal and displaying the difference signal on the viewfinder. The magnitude of the difference signal can be used to determine the degree of hand wobble.
Inventors
- 👤 Kunio Iwaibana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:49
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/68; H04N23/681; H04N23/6811; H04N23/63; H04N23/633; H04N23/634
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
An imaging device for reproducing images comprising: a viewfinder for displaying an imaging signal representing the image to be reproduced to a user of said imaging device; and a hand wobble display circuit, connected to said viewfinder, for generating a difference signal from said imaging signal and displaying said difference signal on said viewfinder, the magnitude of said difference signal indicating the degree of hand wobble of said imaging device by said user.
Claim 2
Dependent Claim
73 words
An imaging device for reproducing images comprising: a viewfinder for displaying an imaging signal representing the image to be reproduced to a user of said imaging device; and a hand wobble display circuit, connected to said viewfinder, for generating a difference signal from said imaging signal and displaying said difference signal on said viewfinder, the magnitude of said difference signal indicating the degree of hand wobble of said imaging device by said user.
Claim 3
Dependent Claim
26 words
An imaging device in accordance with claim 1, wherein said difference signal is a frame-difference signal representing the difference in said imaging signal between successive frames.
Claim 4
Dependent Claim
71 words
An imaging device in accordance with claim 2, wherein said hand wobble display circuit comprises an image memory for storing a frame of said imaging signals, a subtracter for subtracting stored imaging signals of a previous frame from the present frame of imaging signals so as to generate said frame-difference signal, and an adder for adding said frame-difference signal to the present frame of imaging signals for display on said viewfinder.
Claim 5
Dependent Claim
88 words
An imaging device in accordance with claim 2, wherein said hand wobble display circuit comprises an image memory for storing a frame of said imaging signals, a subtracter for subtracting stored imaging signals of a previous frame from the present frame of imaging signals so as to generate said frame-difference signal, at least one comparator for comparing said frame-difference signal to at least one threshold, and an alarm driving circuit for lighting at least one alarm light on said viewfinder for each threshold exceeded by said frame-difference signal.
Claim 6
Dependent Claim
28 words
An imaging device in accordance with claim 4, wherein said at least one alarm light is disposed along the periphery of the displayed image frame of said viewfinder.
Claim 7
Dependent Claim
26 words
An imaging device in accordance with claim 1, wherein said difference signal is a field-difference signal representing the difference in said imaging signal between successive fields.
Claim 8
Dependent Claim
71 words
An imaging device in accordance with claim 6, wherein said hand wobble display circuit comprises an image memory for storing a field of said imaging signals, a subtracter for subtracting stored imaging signals of a previous field from the present field of imaging signals so as to generate said field-difference signal, and an adder for adding said field-difference signal to the present field of imaging signals for display on said viewfinder.
Claim 9
Dependent Claim
88 words
An imaging device in accordance with claim 6, wherein said hand wobble display circuit comprises an image memory for storing a field of said imaging signals, a subtracter for subtracting stored imaging signals of a previous field from the present field of imaging signals so as to generate said field-difference signal, at least one comparator for comparing said field-difference signal to at least one threshold, and an alarm driving circuit for lighting at least one alarm light on said viewfinder for each threshold exceeded by said field-difference signal.
Claim 10
Dependent Claim
28 words
An iaging device in accordance with claim 8, wherein said at least one alarm light is disposed along the periphery of the displayed image field of said viewfinder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |