Position pointing device including a controller for an AC field emitter in accordance with a binary code
First Claim
1. A position pointing device, comprising:
- a receiver for receiving an AC field of a predetermined frequency radiated from a position detecting device;
an emitter for sending an AC field of a desired frequency back to said position detecting device;
a controller for controlling said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field to be sent back to said position detecting device;
a converter for converting said information corresponding to said operation into a time length; and
a counter for counting the number of waves of said AC field of the predetermined frequency received within the time length determined by said converter and for binary-coding the counted value.
1 Assignment
0 Petitions
Accused Products
Abstract
A position pointing device codes information corresponding to an operation expressed by a continuously variable parameter without using an A/D converter and transmits the coded information to a position detecting device. The information corresponding to the operation expressed by the continuously variable parameter is converted into a time length. A counter counts the number of waves of an AC field received by a receiving circuit within the time length determined by the converting circuit, and performs binary coding of the counted value. A control circuit controls an emitter circuit in accordance with the binary code to change an AC field which is sent back to the position detecting device.
111 Citations
17 Claims
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1. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated from a position detecting device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a controller for controlling said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field to be sent back to said position detecting device; a converter for converting said information corresponding to said operation into a time length; and a counter for counting the number of waves of said AC field of the predetermined frequency received within the time length determined by said converter and for binary-coding the counted value. - View Dependent Claims (13, 14, 15, 16, 17)
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2. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated at predetermined intervals from a position detecting device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a timing extractor for extracting said predetermined intervals from the received AC field; a controller for controlling, at preselected intervals based on said predetermined intervals, said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field which is to be sent back to said position detecting device; a converter for converting said information corresponding to said operation into a time length; and a counter for counting the number of waves of said AC field of the predetermined frequency received within the time length determined by said converter and for binary-coding the counted value. - View Dependent Claims (10, 11)
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3. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated from a position pointing device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a controller for controlling said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field to be sent back to said position detecting device; plural converters for converting a plurality of kinds of information corresponding to a plurality of types of operation expressed by continuously variable parameters into time lengths; and plural counters for counting the number of waves of said AC field of the predetermined frequency received within the respective time lengths determined by said converters and for binary-coding the counted values.
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4. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated at predetermined intervals from a position detecting device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a timing extractor for extracting said predetermined intervals from the received AC field; a controller for controlling, at preselected intervals based on said predetermined intervals, said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field to be sent back to said position detecting device; plural converters for converting a plurality of kinds of information corresponding to a plurality of types of operation expressed by continuously variable parameters into time lengths; and plural counters for counting the number of waves of said AC field of the predetermined frequency received within the respective time lengths determined by said converting means and for binary-coding the counted values.
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5. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated at predetermined intervals from a position detecting device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a timing extractor for extracting said predetermined intervals from the received AC field; a controller for controlling, at preselected intervals based on said predetermined intervals, said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field to be sent back to said position detecting device; plural converters for converting a plurality of kinds of information corresponding to a plurality of types of operation expressed by continuously variable parameters into time lengths; a counter for counting the number of waves of the received AC field of the predetermined frequency and for binary coding the counted value; a counter controller for initiating operation of said plural converters at a preselected timing based on said predetermined intervals while initiating the operation of said counter at said preselected intervals or intervals synchronized therewith; and a memory for holding the counted values as obtained by said counter at moments at which the time lengths determined by said converters expire. - View Dependent Claims (7, 12)
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6. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated at predetermined intervals from a position detecting device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a timing extractor for extracting said predetermined intervals from the received AC field; a controller for controlling, at preselected intervals based on said predetermined intervals, said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in said AC field to be sent back to said position detecting device; plural converters for converting a plurality of kinds of information corresponding to plural types of operation expressed by continuously variable parameters into time lengths; a counter for counting the number of waves of the received AC field of the predetermined frequency and for binary coding the counted value; a counter controller for successively initiating the operations of said plural converters one after another at a series of intervals of a predetermined time interval starting with a preselected interval based on said predetermined intervals, while repeatedly initiating the operation of said counter at said series of intervals or at intervals synchronized therewith; and a memory for holding the counted values as obtained by said counter at moments at which the time lengths determined by said converter expire. - View Dependent Claims (9)
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8. A position pointing device, comprising:
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a receiver for receiving an AC field of a predetermined frequency radiated at predetermined intervals from a position detecting device; an emitter for sending an AC field of a desired frequency back to said position detecting device; a timing extractor for extracting said predetermined intervals from the received AC field; a controller for controlling, at preselected intervals based on said predetermined intervals, said emitter in accordance with a binary code indicative of information corresponding to an operation which is expressed by a continuously variable parameter, so as to cause a change in the AC field to be sent back to said position detecting device; plural converters for converting plural types of information corresponding to plural types of operation expressed by continuously variable parameters into time lengths; a counter for counting the number of waves of the received AC field of the predetermined frequency and for binary coding the counted value; a counting controller for initiating the operation of one of said plural converters and then initiating the operation of the next one of said plural converters at a interval at which the time length determined by said one of said plural converters expires or at a timing synchronized therewith, thus sequentially initiating operations of the remainder of converters one after another, while repeatedly initiating the operation of said counter at the intervals of initiation of the successive converters or at intervals synchronized therewith; and a memory for holding the counted values as obtained in said counter at moments at which the time lengths determined by said converters expire.
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Specification