Approach position input device

Details Approach position input device Approach position input device

2006-03-14

2006-03-14

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

C342S374000

Reexamination Certificate

active

07012567

ABSTRACT:
An approach position input device includes a plurality of antennas arranged in the form of a lattice. An oscillator applies a high-frequency ac voltage to the antennas. A signal processing circuit processes signals from the antennas. A change-over switch including switching elements sequentially changes over a connection between the antennas and the signal processing circuit. CPU sends a selection signal to the change-over switch for antenna selection. CPU calculates an approach position of a human body according to signals from the signal processing circuit. CPU instructs the change-over switch to apply the ac voltage from the oscillator only to the antenna selected according to the selection signal.

REFERENCES:
patent: 4658373 (1987-04-01), Murakami et al.
patent: 5280631 (1994-01-01), Nakahi et al.
patent: 5739812 (1998-04-01), Mochizuki et al.
patent: 5792997 (1998-08-01), Fukuzaki
patent: 6020849 (2000-02-01), Fukuzaki
patent: 2000-020229 (2000-01-01), None
patent: 2002-342033 (2002-11-01), None

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