Apparatus for detecting electro-magnetic stylus signals by induc

Details Apparatus for detecting electro-magnetic stylus signals by induc Apparatus for detecting electro-magnetic stylus signals by induc

1995-12-13

1998-06-16

Lee, Thomas C.

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

395500, 395821, 395889, 395893, 345145, 345156, 345158, 345173, 178 46, 178114, G06F 1300

Patent

active

057686165

ABSTRACT:
A method and apparatus for detecting the presence of a stylus relative to an active area of a display screen. The method includes the steps of providing a number of sensors which are positioned to define a boundary surrounding an active area of the display screen, and transmitting an electromagnetic signal from the stylus to the sensors wherein the signal is indicative of the presence of the stylus relative to the active area.

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