Display-integrated type tablet device

Details Display-integrated type tablet device Display-integrated type tablet device

1993-05-19

1995-08-15

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345173, G09G 336

Patent

active

054423732

ABSTRACT:
Displacement between an actual designation position designated by a detection pen and a detection coordinates is corrected. A correction calculation section includes a plurality of processing mode determination modules, a propagation delay correction module, an inward displacement correction module, a waveform distortion correction module, and a periodical fluctuation correction module. The processing mode determination module determines a correction module according to a detection coordinate value input. Each of the correction modules includes a correction formula or a lookup table inherent to each area. According to the correction formula or the lookup table, input detection coordinate value is corrected to thereby correct the displacement between the actual designation position and the detection coordinate value.

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patent: 4839634 (1989-06-01), More et al.
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patent: 4947156 (1990-08-01), Sato et al.
patent: 5070325 (1991-12-01), Tanaka et al.

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