Coordinate input apparatus

Details Coordinate input apparatus Coordinate input apparatus

1995-02-28

1996-10-01

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Stylus

178 18, G09G 500

Patent

active

055614477

ABSTRACT:
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, includes: an output device to output the coordinate value data; a detector for detecting the down state of the input pen; a memory 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 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.

REFERENCES:
patent: 4477877 (1984-10-01), Nakamura et al.
patent: 4564928 (1986-01-01), Glenn et al.
patent: 4575580 (1986-03-01), Jandrell
patent: 4660055 (1987-04-01), Enda
patent: 4775765 (1988-10-01), Kimura et al.
patent: 4789836 (1988-12-01), May
patent: 4866646 (1989-09-01), Nakamura et al.
patent: 4886943 (1989-12-01), Suzuki et al.
patent: 4931965 (1990-06-01), Kaneko et al.
patent: 4947156 (1990-08-01), Sato et al.

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