US5635948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display apparatus provided with use-state detecting unit
Assignee: Canon Inc
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Filing: 1995-04-20
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Granted: 1997-06-03
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Expires: 2015-04-20
Abstract
Abstract The present invention concerns a display apparatus, which comprises a display device for displaying image information for the both eyes of an observer, a use-state detecting device for detecting a use state and a non-use state about whether or not the observer is observing the display device, a power supply device for supplying power to each element in the display apparatus, and a device for controlling the power supply device, based on a signal from the use-state detecting device.
Inventors
- 👤 Satoshi Tonosaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:50
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F3/147; G09; G09G; G09G2330/00; G09G2330/02; G09G2330/021
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A display apparatus to be mounted on the head of an observer, comprising: display means for displaying image information for both eyes of said observer; use-state detecting means for detecting a use state and a non-use state about whether or not said observer is observing said display means; portable power supply means for supplying power to each element in said display apparatus; and means for controlling said portable power supply means, based on a signal from said use-state detecting means.
Claim 2
Dependent Claim
80 words
A display apparatus to be mounted on the head of an observer, comprising: display means for displaying image information for both eyes of said observer; use-state detecting means for detecting a use state and a non-use state about whether or not said observer is observing said display means; portable power supply means for supplying power to each element in said display apparatus; and means for controlling said portable power supply means, based on a signal from said use-state detecting means.
Claim 3
Dependent Claim
22 words
The apparatus according to claim 1, wherein said use-state detecting means comprises means for detecting information concerning an eye of said observer.
Claim 4
Dependent Claim
23 words
The apparatus according to claim 2, wherein said information detecting means comprises means for detecting reflected light from a cornea of said observer.
Claim 5
Dependent Claim
42 words
The apparatus according to claim 1, wherein said use-state detecting means comprises means for detecting the use state a plurality of times at predetermined time intervals and determines the use state, based on a number of use states or non-use states detected.
Claim 6
Dependent Claim
33 words
The apparatus according to claim 1, wherein said controlling means starts supplying said power to all elements when said controlling means receives a signal indicating said use state from said use-state detecting means.
Claim 7
Dependent Claim
31 words
The apparatus according to claim 1, further comprising alarming means for generating an alarm signal to said observer, based on a signal indicating said non-use state from said use-state detecting means.
Claim 8
Dependent Claim
52 words
The apparatus according to claim 6, wherein after said alarming means gives an alarm and when after a lapse of a predetermined time therefrom a signal of non-use state is obtained from said use-state detecting means, said controlling means stops the power supply from said power supply means to all the elements.
Claim 9
Dependent Claim
37 words
The apparatus according to claim 1, wherein said display apparatus further comprises a main power switch and wherein if said main power switch is turned on, then said use-state detecting means performs use-state detection at the beginning.
Claim 10
Dependent Claim
33 words
The apparatus according to claim 1, wherein said controlling means stops power supply to a predetermined element when said controlling means receives a signal indicating the non-use state from said use-state detecting means.
Claim 11
Dependent Claim
32 words
The apparatus according to claim 1, wherein the display means comprises a first display for the left eye of the observer and a second display for the right eye of the observer.
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) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |