Printed conductive ink electrostatic shield for...

Details Printed conductive ink electrostatic shield for... Printed conductive ink electrostatic shield for...

H - Electricity

05

K

H05K 9/00 (2006.01) G06F 3/033 (2006.01)

Patent

CA 2126689

In an electromagnetic digitizer tablet (14) having a grid of receptor wires (30) disposed below a working surface over which a cursor (12) emanating a magnetic field detected by the receptor wires is moved, this invention is an improvement to reduce elec- trostatically-caused jitters in data from the receptor wires (30). A grounded electrically conductive shield (40) disposed between the grid of receptor wires and the working surface (54). The grounded electrically conductive shield (40) is of a material and thick- ness to pass the magnetic field without substantial attenuation while conducting any electrostatic energy forming thereon to ground. Both conductive ink and a very thin metal foil can be used for the shield. The digitizer tablet is also shown embodied in the input/display device of a pen-driven computing system.

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