Title:
【発明の名称】位置検出装置及びその方法
Document Type and Number:
Japanese Patent JP3015269
Kind Code:
B2
Abstract:
A device for detecting position which has a good S/N performance and which can be easily designed is provided. Said device has the feature of: a plurality of antennae in which three or more turns of loop coils are arranged in parallel; a transmitting circuit for transmitting an electromagnetic wave via one of the antennae; a receiving circuit for receiving a responding electromagnetic wave from the position indicator; a selecting circuit for selecting one of the antennae; a transmitting/receiving switch circuit for connecting the selected antenna to either of said transmitting circuit or said receiving circuit; a connecting control circuit for controlling operations of the selecting circuit and the transmitting circuit; and a discriminator circuit for discriminating the position and the state of said switch based upon the characteristics of a signal received to send the discriminated information. Said connecting control circuit selects an antenna predicted to be the most proximate antenna to said position indicator during transmission operation of the indicator; and controls such that each of said antennae is sequentially selected to be scanned for reception during receiving operation.
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Inventors:
Yasuhiro Fukusaki
Application Number:
JP32994294A
Publication Date:
March 06, 2000
Filing Date:
December 05, 1994
Export Citation:
Assignee:
Wacom Co., Ltd.
International Classes:
G06F3/033; G06F3/046; (IPC1-7): G06F3/03; G01B7/00
Attorney, Agent or Firm:
Takashiro Kojima