US4897510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordinate inputting device including an electrode to reduce noise components
Assignee: Canon Inc
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Filing: 1989-03-30
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Granted: 1990-01-30
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Expires: 2009-03-30
Abstract
Abstract A coordinate inputting device in which the vibrations imparted from a vibration pen to a vibration transmitting plate are detected by a plurality of vibration sensors so as to enable the coordinates of a vibration input point to be detected using the time it takes for the vibrations to propagate on the vibration transmitting plate. The vibration transmitting plate has noise interrupting means for preventing noise coexistent with the vibrations imparted by the vibration pair for coordinate detection from being input to the vibration sensor.
Inventors
- 👤 Atsushi Tanaka
- 👤 Shinnosuke Taniishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:10
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/043; G06F3/0433; Y; Y10; Y10S; Y10S367/00; Y10S367/907
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
In combination with a coordinate inputting device in which the vibrations imparted from a vibration pen to a vibration transmitting plate are detected by a plurality of vibration sensors so as to enable the coordinates of a vibration input point to be detected using the time it takes for the vibrations to propagate on said vibration transmitting plate, a noise interrupting means affixed to said vibration transmitting plate for preventing noise coexistent with the vibrations for coordinate detection from being input to said vibration sensors.
Claim 2
Dependent Claim
85 words
In combination with a coordinate inputting device in which the vibrations imparted from a vibration pen to a vibration transmitting plate are detected by a plurality of vibration sensors so as to enable the coordinates of a vibration input point to be detected using the time it takes for the vibrations to propagate on said vibration transmitting plate, a noise interrupting means affixed to said vibration transmitting plate for preventing noise coexistent with the vibrations for coordinate detection from being input to said vibration sensors.
Claim 3
Dependent Claim
25 words
A coordinate inputting device combination according to claim 1, wherein said noise interrupting means is adapted to function as an electrode of said vibration sensors.
Claim 4
Dependent Claim
21 words
A coordinate inputting device combination according to claim 1, wherein said noise interrupting means comprises an electrically conductive, optically transparent member.
Claim 5
Dependent Claim
43 words
A coordinate inputting device combination according to claim 1, wherein a reflection prevention member supports a periphery of said vibration transmitting plate, thereby preventing vibrations that propagate through said vibration transmitting plate from being reflected by the periphery of said vibration transmitting plate.
References Cited (Backward Citations)
US4665202A
Cited
US4665282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |