EP0544278A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coordinate input apparatus
Assignee: Canon Inc
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Filing: 1992-11-26
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Granted: —
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Expires: 2012-11-26
Abstract
Abstract Disclosed is a coordinate input apparatus for detecting an input vibration from a vibration pen by a vibration sensor provided on a vibration transmitting plate to measure a vibration transmission time to the vibration pen to detect the input coordinates of the vibration pen on the vibration transmitting plate on the basis of the measurement result. The vibration pen is made wireless by incorporating all mechanisms required to generate the vibration. A drive timing for vibration input from the vibration pen and used as a measurement origin of the vibration transmission time is transmitted to a main body for performing the coordinate detection processing by bringing the vibration pen in temporary contact with the main body.
Inventors
- 👤 Katsuyuki c/o Canon K.K. Kobayashi
- 👤 Shinnosuke C/O Canon K.K. Taniishi
- 👤 Atsushi C/O Canon K.K. Tanaka
- 👤 Yuichiro C/O Canon K.K. Yoshimura
- 👤 Kiyoshi c/o Canon K.K. Kaneko
- 👤 Ryozo c/o Canon K.K. Yanagisawa
- 👤 Masaki c/o Canon K.K. Tokioka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:57
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/043; G06F3/0433
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A coordinate input apparatus for detecting vibration inputted from vibration input means by using vibration detecting means provided on a vibration transmitting member to measure a vibration transmission time to said vibration input means to detect input coordinates of said vibration input means on said vibration transmitting member on the basis of the measurement result, wherein said vibration input means is made wireless by incorporating all mechanisms therein required to generate the vibration, and said apparatus comprises means for transmitting a drive timing for vibration input from said vibration input means, to a main body for performing the coordinate detection processing by bringing said vibration input means in temporary contact with said main body, said drive timing being used as a measurement origin of the vibration transmission time.
Claim 2
Dependent Claim
26 words
An apparatus according to claim 1, wherein the temporary contact is performed through holding means provided on said main body, for holding said vibration input means.
Claim 3
Dependent Claim
103 words
A coordinate input apparatus for detecting vibration inputted from vibration input means by using vibration detecting means provided on a vibration transmitting member to measure a vibration transmission time to said vibration input means to detect input coordinates of said vibration input means on said vibration transmitting member on the basis of the measurement result, wherein said vibration input means includes means for transmitting information except the input coordinates to an apparatus main body for performing coordinate detection processing via vibration transmission to said vibration transmitting member, and said apparatus main body includes means for performing processing in accordance with the information transmitted.
Claim 4
Dependent Claim
149 words
A coordinate input apparatus for detecting an input vibration from vibration input means by using vibration detecting means provided on a vibration transmitting member to detect coordinates of said vibration input means on a vibration transmitting member, comprising: extracting means for extracting a plurality of signal components having different transmission velocities from a detection signal waveshape obtained when said vibration detecting means detects the vibration transmitted on said vibration transmitting member; counting means for obtaining transmission time differences between the signal components obtained by said extracting means; and means for detecting a distance from a vibration input point of said vibration input means to said vibration detecting means in accordance with the transmission times of the plurality of signal components on said vibration transmitting member and the times counted by said counting means, and obtaining a position of the vibration input point on the basis of the detected distance.
Claim 5
Dependent Claim
142 words
A coordinate input apparatus in which a plurality of vibration sensors are arranged on a coordinate input surface on which a vibration propagates to measure distances from coordinate designating means for generating a vibration to said each vibration sensor in accordance with time of arrival of the vibration to calculate a point designated on said coordinate input surface by said coordinate designating means as coordinate value, comprising: means for measuring a delay time concerning a phase velocity of a vibration of a first frequency propagating on said coordinate input surface; means for measuring a delay time concerning a group velocity of a vibration of a second frequency higher than the first frequency, propagating on said coordinate input surface; and means for obtaining a coordinate position of said coordinate designating means on the basis of the group velocity and the phase velocity measured.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 5, wherein said coordinate designating means includes vibration generating means to be driven alternately by the first and second frequencies at a predetermined period.
Claim 7
Dependent Claim
84 words
An apparatus according to claim 5, further comprising a first bandpass filter using the first frequency as a center frequency and a second bandpass filter using the second frequency as a center frequency, and wherein said vibration designating means generates a vibration with a band width covering the first and second frequencies, said first bandpass filter extracts a vibration of the first frequency from the output signal from said vibration sensor, and said second bandpass filter extracts a vibration of the second frequency therefrom.
References Cited (Backward Citations)
No citation records indexed.
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