EP0383304A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coordinate input apparatus
Assignee: Canon Inc
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Filing: 1990-02-14
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Granted: —
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Expires: 2010-02-14
Abstract
Abstract There is provided a coordinate input apparatus in which by indicating a desired position on a coordinate input surface (11) by an input pen (13), coordinate value data of the indicated position is detected and output, comprising: an output device (17) to output the coordinate value data; a detector (18) for detecting the down state of the input pen; a memory (14) for storing the coordinate value data detected after the elapse of a predetermined time from the detection of the pen-down state by detector; and a controller (10) for allowing the coordinate value data stored in the memory to be output by the output device such as a liquid crystal display. With the apparatus, the fluctuations of the coordinate value data just after the pen-down operation and just before the pen-up operation can be eliminated and the stable coordinate value data can be always output. An erroneous detection due to the fluctuation of the coordinate value data upon coordinate input can be prevented.
Inventors
- 👤 Noriyuki Suzuki
- 👤 Shigeki Mori
- 👤 Atsushi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 10:52
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/045; G09; G09B; G09B5/00; G09B5/06; G09B5/062
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, comprising: output means for outputting the coordinate value data; detecting means for detecting a down state of the input pen; memory means for storing the coordinate value data which was detected after the elapse of a predetermined time from the detection of the pen-down operation by the detecting means; and control means for allowing the coordinate value data stored in the memory means to be output by the output means.
Claim 2
Dependent Claim
101 words
A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, comprising: output means for outputting the coordinate value data; detecting means for detecting a down state of the input pen; memory means for storing the coordinate value data which was detected after the elapse of a predetermined time from the detection of the pen-down operation by the detecting means; and control means for allowing the coordinate value data stored in the memory means to be output by the output means.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1, wherein said output means is display means for displaying the coordinate value data.
Claim 4
Dependent Claim
126 words
A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, comprising: output means for outputting the coordinate value data; memory means for storing the coordinate value data of the position indicated by the input pen; detecting means for detecting an up state of the input pen; and control means for controlling in a manner such that when it is detected by the detecting means that the input pen has been lifted up, the coordinate value data which had been stored in the memory means before the detection time point of the pen-up operation is corrected and the corrected data is output by the output means.
Claim 5
Dependent Claim
126 words
A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, comprising: output means for outputting the coordinate value data; memory means for storing the coordinate value data of the position indicated by the input pen; detecting means for detecting an up state of the input pen; and control means for controlling in a manner such that when it is detected by the detecting means that the input pen has been lifted up, the coordinate value data which had been stored in the memory means before the detection time point of the pen-up operation is corrected and the corrected data is output by the output means.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 3, wherein said output means is display means for displaying the coordinate value data.
Claim 7
Dependent Claim
37 words
An apparatus according to claim 3, wherein said control means outputs a mean value of the three coordinate value data which had been stored in the memory means before the detection time point of the pen-up operation.
Claim 8
Dependent Claim
136 words
A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, comprising: detecting means for detecting that the coordinate input surface was pressed by the input pen; coordinate value obtaining means for obtaining the coordinate value data of the pressed position when it is detected by the detecting means that a position on the coordinate input surface was pressed; and control means for controlling in a manner such that during the operation to obtain the coordinate value data by the coordinate value obtaining means, when it is detected by the detecting means that a pressure on the coordinate input surface was released, the coordinate value data obtained by the coordinate value obtaining means is made invalid.
Claim 9
Dependent Claim
136 words
A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, comprising: detecting means for detecting that the coordinate input surface was pressed by the input pen; coordinate value obtaining means for obtaining the coordinate value data of the pressed position when it is detected by the detecting means that a position on the coordinate input surface was pressed; and control means for controlling in a manner such that during the operation to obtain the coordinate value data by the coordinate value obtaining means, when it is detected by the detecting means that a pressure on the coordinate input surface was released, the coordinate value data obtained by the coordinate value obtaining means is made invalid.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 6, further having display means for displaying coordinate value data.
Claim 11
Dependent Claim
15 words
An apparatus according to claim 7, wherein said display means is a liquid crystal display.
References Cited (Backward Citations)
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