Image input device using tablet

Details Image input device using tablet Image input device using tablet

Filed on

1995-12-28

Date issued

1999-07-20

Examiner

Hjerpe, Richard A.

Patent Class

Computer graphics processing and selective visual display system

SubClass

Plural physical display element control system

SubSubClass

Display elements arranged in matrix

Other Related Categories

345173, G09G 336

Type

Patent

Status

active

Patent number

059261633

Description

ABSTRACT:
In a tablet device incorporating a combined display and input, in order to correct a deviation between a position recognized by the device and a position indicated by the user caused by an arrangement of external electrodes outside an indication range, the indication range is divided into a plurality of correction regions, and different corrections are carried out in the respective regions. More specifically, in a region in which detected coordinates deviate, in the vicinity of a portion where scan electrodes converge on driver IC, a position in the x axis direction having the largest deviation is set as coordinates X(1) to X(M-1). These coordinates are used as boundary coordinates of a correction region in the x axis direction. On the other hand, boundary coordinates .+-.Y(1) to .+-.Y(N) in the y axis direction are set according to the distances from driver ICs. Correction expressions in the respective regions of 1-(1) to N-(M) and 1'-(1) to N'-(M) defined by the boundary coordinates in the x and y axis directions are stored in a memory. Coordinates (x, y) detected by the user indicating the indication range by a pen or the like are corrected according to the correction expressions stored corresponding to the respective regions including the coordinates.

REFERENCES:
patent: 5410329 (1995-04-01), Tagawa et al.
patent: 5420704 (1995-05-01), Winkelman
patent: 5442373 (1995-08-01), Nomura et al.
patent: 5606346 (1997-02-01), Kai et al.
patent: 5631666 (1997-05-01), Tagawa et al.

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