Integration of pen-based capability into a field emission device

Details Integration of pen-based capability into a field emission device Integration of pen-based capability into a field emission device

1995-01-03

1996-09-10

Chin, Wellington

Telegraphy

Systems

Position coordinate determination for writing

345173, 313496, G08C 2100

Patent

active

055548288

ABSTRACT:
A field emission device pen-based system comprising a pen stylus 20 and a field emission device having a cathode 2 coupled to an anode 1, row and column drivers 68 and 66 coupled to the cathode and to a controller 64, row and column lines 96 and 98 respectively coupled to the row and column drivers 68 and 66, and receive circuitry 81 and 91 coupled to the controller 64 and to the row and column lines 96 and 98; wherein the row and column drivers 68 and 66 send a pulse on the row and column lines 96 and 98 in response to an input signal from the controller 64, and the receive circuitry 81 and 91 receive a pulse from the stylus on the row and column lines 98 and 96. The receive circuitry 81 and 91 send an output signal to the controller 64 responsive to the received pulses and the controller 64 determines the x-y location of the stylus 20 based on that output signal.

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