US4651145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system for the disabled in which a display target is selected by encephalogram response
Assignee: Medical Research Institute
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Filing: 1984-05-31
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Granted: 1987-03-17
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Expires: 2004-05-31
Abstract
Abstract A method of oculo-encephalographic communication in which a plurality of optical stimuli provide unique code which can be identified from the EEG of viewer. The code is preferably an M-sequence binary code whereby simultaneous testing can be employed to identify the viewed optical stimulus. A special binary sequence, or M-sequence, is utilized from which a viewed element be identified through use of a response template or sample response as predetermined from the user's encephalogram.
Inventors
- 👤 Erich E. Sutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/011; G06F3/015; A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/346; A61B5/349; A61B5/35; A61B5/369; A61B5/377; G09; G09B; G09B21/00; G09B21/001; G09B21/007
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
71 words
A method of oculo-encephalographic communication comprising the steps of providing a plurality of visual stimuli and a unique code signal corresponding to each of said visual stimuli, obtaining an EEG signal of a viewer while viewing said visual stimuli, adaptively identifying one of said unique code signals with corresponding ones of said EEG signals, and adaptively identifying one of said visual stimuli viewed by said viewer from each identified code signal.
Claim 2
Independent Claim
71 words
A method of oculo-encephalographic communication comprising the steps of providing a plurality of visual stimuli and a unique code signal corresponding to each of said visual stimuli, obtaining an EEG signal of a viewer while viewing said visual stimuli, adaptively identifying one of said unique code signals with corresponding ones of said EEG signals, and adaptively identifying one of said visual stimuli viewed by said viewer from each identified code signal.
Claim 3
Dependent Claim
15 words
The method as defined by claim 1 wherein said code comprises an M-sequence binary code.
Claim 4
Dependent Claim
73 words
An oculo-encephalographic communication system comprising a visual display for projecting a plurality of independently controlled visual stimuli, means for controlling said plurality of visual stimuli whereby each stimulus transmits a unique code signal, means for obtaining an EEG signal from a viewer while viewing said display, and means for adaptively identifying a unique code with a corresponding one of said EEG signals thereby identifying one of said visual stimuli viewed by said viewer.
Claim 5
Dependent Claim
73 words
An oculo-encephalographic communication system comprising a visual display for projecting a plurality of independently controlled visual stimuli, means for controlling said plurality of visual stimuli whereby each stimulus transmits a unique code signal, means for obtaining an EEG signal from a viewer while viewing said display, and means for adaptively identifying a unique code with a corresponding one of said EEG signals thereby identifying one of said visual stimuli viewed by said viewer.
Claim 6
Dependent Claim
22 words
The system as defined by claim 3 wherein said visual display comprises a video display having a matrix of elements for viewing.
Claim 7
Dependent Claim
16 words
The system as defined by claim 4 wherein said unique code is an M-sequence binary code.
Claim 8
Dependent Claim
36 words
The system as defined by claim 5 wherein said means for identifying an optical element assigns a +1 value to a stimulated response, a -1 value to lack of a stimulated response, and sums all values.
Claim 9
Dependent Claim
18 words
The system as defined by claim 3 and further including means responsive to identification of an optical element.
Claim 10
Dependent Claim
28 words
The system as defined by claim 7 wherein said means responsive to identification of an optical element includes computer means for controlling an overlay for said optical matrix.
References Cited (Backward Citations)
US4158196A
Cited
US4293855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |