Pen-shaped coordinate pointing device

Details Pen-shaped coordinate pointing device Pen-shaped coordinate pointing device

2005-08-30

2005-08-30

Shalwala, Bipin (Department: 2673)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Stylus

C178S018010, C178S018070, C178S019010, C178S019030, C178S019040

Reexamination Certificate

active

06937231

ABSTRACT:
In an input pen having a pen-shaped casing, a ferrite core with a coil wound thereon and a ferrite chip are placed opposed to each other with an O-ring therebetween. The ferrite chip has a projection. When the input pen is operated, the projection and the ferrite core are moved closer together. When the ferrite chip is moved closer to the ferrite core during operation, the projection is placed substantially close to the ferrite core. Therefore, high responsivity is ensured without moving the ferrite chip into the coil, and there is no need to form an opening or a cavity in the ferrite core.

REFERENCES:
patent: 5461204 (1995-10-01), Makinwa et al.
patent: 5576502 (1996-11-01), Fukushima et al.
patent: 5633471 (1997-05-01), Fukushima
patent: 5914708 (1999-06-01), LaGrange et al.
patent: 6278440 (2001-08-01), Katsurahira et al.
patent: 6801192 (2004-10-01), Fujitsuka et al.

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