Digitizer utilizing heat source detection to receive input infor

Details Digitizer utilizing heat source detection to receive input infor Digitizer utilizing heat source detection to receive input infor

1996-08-21

1998-04-07

Kuntz, Curtis

Telegraphy

Systems

Position coordinate determination for writing

178 19, 345158, 345175, G08C 2100, G09G 302

Patent

active

057366870

ABSTRACT:
A heat sensing digitizer is formed on an input area by providing at least two heat sensors at positions fixed relative to the input area. The heat sensors detect heat provided by a heat source, such as a pen with a heated tip. Based on the calculated distance of the tip to each of the heat sensors, the location of the heat sensitive tip in the input area is determined. Multiple sensors further permit detection of the intensity of the heat source or three-dimensional position of the heat source.

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