Position detecting apparatus and poiting device therof

A position detecting system capable of making communications with a plurality of pointing devices without changing resonance circuits of said pointing devices, and a pointing device suitable for the position detecting system. The position detecting system detects positions of at least two cordless p...

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Bibliographic Details
Main Author FUKUZAKI, YASUHIRO
Format Patent
LanguageEnglish
French
German
Published 16.10.1996
Edition6
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A position detecting system capable of making communications with a plurality of pointing devices without changing resonance circuits of said pointing devices, and a pointing device suitable for the position detecting system. The position detecting system detects positions of at least two cordless pointing devices on a two-dimensional plane and is equipped with a command electromagnetic wave transmitting circuit to transmit a command to the pointing device. Included in the position detecting system are a first group of antennae X1 to X11 arranged successively in one of the directions orthogonal to each other within the two-dimensional plane 11, a second group of antennae Y1 to Y8 arranged successively in the other direction orthogonal to the one direction within the two-dimensional plane 11, a selection circuit for, from the first and second antenna groups, selecting an antenna which is more strongly coupled to the pointing device to be measured than to the other pointing device in transmitting an electromagnetic wave, and a transmission circuit for transmitting an electromagnetic wave from the selected antenna to the pointing device to be measured.
Bibliography:Application Number: EP19950119973