METHOD AND SYSTEM FOR INPUTTING INFORMATION USING ULTRASONIC SIGNALS
First Claim
1. A signal generation apparatus included in an information input system which inputs information by using a reference signal and an ultrasonic signal, comprising:
- a reference signal generation unit which generates the reference signal;
an ultrasonic generation unit which generates the ultrasonic signal;
a reference signal reception unit which receives the reference signal; and
a signal generation controller which outputs a control signal for controlling generation of the reference signal and the ultrasonic signal to the reference signal generation unit and the ultrasonic generation unit so that the reference signal and the ultrasonic signal generated by the signal generation apparatus do not interfere with a reference signal and an ultrasonic signal generated by a different information input system by using the reference signal which is generated by the different information input system and received by the reference signal reception unit.
1 Assignment
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Accused Products
Abstract
Provided are an information input system and an information input method using an ultrasonic signal. In the information input system or method, a signal generation apparatus for generating a reference signal and an ultrasonic signal or an information input apparatus for generating a reference signal receives a reference signal and an ultrasonic signal which are generated by a different signal generation apparatus which inputs information in an adjacent area or the information input apparatus, determines whether or not there is a possibility of interference of the signals generated by the different signal generation apparatus or the information input apparatus, and adaptively changes an effective section where the reference signal and the ultrasonic signal are generated to an idle section in the same period or the next period if it is determined that there is a possibility of the interference, so that the signal interference is prevented. Therefore, even in the environment where a plurality of the information input systems are present, it is possible to stably input information.
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Citations
43 Claims
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1. A signal generation apparatus included in an information input system which inputs information by using a reference signal and an ultrasonic signal, comprising:
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a reference signal generation unit which generates the reference signal; an ultrasonic generation unit which generates the ultrasonic signal; a reference signal reception unit which receives the reference signal; and a signal generation controller which outputs a control signal for controlling generation of the reference signal and the ultrasonic signal to the reference signal generation unit and the ultrasonic generation unit so that the reference signal and the ultrasonic signal generated by the signal generation apparatus do not interfere with a reference signal and an ultrasonic signal generated by a different information input system by using the reference signal which is generated by the different information input system and received by the reference signal reception unit. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10)
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5. (canceled)
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6. (canceled)
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11. An information input apparatus included in an information input system which inputs information by using an ultrasonic signal and a reference signal, comprising:
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an ultrasonic reception unit which receives an ultrasonic signal generated by a signal generation apparatus; a reference signal generation unit which generates a reference signal for instructing the signal generation apparatus to generate the ultrasonic signal; a reference signal reception unit which receives the reference signal; and an information input controller which outputs a control signal for controlling generation of the reference signal to the reference signal generation unit so that the ultrasonic signal generated by the signal generation apparatus does not interfere with an ultrasonic signal generated by the signal generation apparatus of a different information input system by using a reference signal which is generated by the different information input system and received by the reference signal reception unit. - View Dependent Claims (12, 13, 14, 17, 18, 19, 20, 21)
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15. (canceled)
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16. (canceled)
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22. An information input system comprising:
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a signal generation apparatus which receives a signal generation control signal and generates an ultrasonic signal; an ultrasonic reception unit which includes a plurality of ultrasonic sensors each of which receives the ultrasonic signal; an information input unit which measures a position of the signal generation apparatus by using a time difference between an output time of a signal generation control signal output to the signal generation apparatus and a reception time of the ultrasonic signal received by the ultrasonic reception unit in an effective section where the signal generation control signal is output and inputs position information; and an information input controller which generates the signal generation control signal to output the signal generation control signal to the signal generation apparatus and the information input unit, determines by using the position information input from the information input unit whether or not interference of the ultrasonic signal generated by the signal generation apparatus with an ultrasonic signal generated by a different information system occurs, and changes the effective section where the signal generation control signal is generated in the case where the interference occurs. - View Dependent Claims (23, 24, 25)
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26. An information input method performed by an information input system which inputs information by using a reference signal and an ultrasonic signal, comprising steps of:
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(a) in a signal generation apparatus, generating the reference signal and the ultrasonic signal at a predetermined time period, receiving a reference signal of a different information input system, and determining whether or not there is a possibility of signal interference; (b) in the signal generation apparatus, changing an effective section of a time period where the reference signal and the ultrasonic signal are generated in the case where there is a possibility of signal interference; and (c) after the signal generation apparatus changes the effective section, repetitively performing the steps (a) and (b). - View Dependent Claims (27, 28)
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29. (canceled)
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30. (canceled)
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31. (canceled)
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32. (canceled)
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33. An information input method using a reference signal and an ultrasonic signal in an information input system including an information input apparatus which generates the reference signal at a predetermined time period and a signal generation apparatus which receives the reference signal and generates the ultrasonic signal, comprising steps of:
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(a) in the information input apparatus, receiving a reference signal generated by a different information input system and determines whether or not there is a possibility of interference of the ultrasonic signal generated by the signal generation apparatus corresponding to the information input apparatus with an ultrasonic signal or the reference signal generated by the different information input system; (b) in the case where it is determined that there is a possibility of interference, in the information input apparatus, changing an effective section in a time period where the reference signal is generated by the information input apparatus and the ultrasonic signal is generated by the signal generation apparatus; and (c) in the information input apparatus, generating a reference signal in the changed effective section, measuring a position of the signal generation apparatus by using the ultrasonic signal received from the signal generation apparatus in the same effective section, and inputting information. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. An information input method performed in an information input system which inputs information by using an ultrasonic signal, comprising steps of:
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(a) an information input apparatus, outputting a signal generation control signal to a signal generation apparatus which is connected in a wire at a predetermined time period; (b) the signal generation apparatus which receives the signal generation control signal, generating the ultrasonic signal; (c) the information input apparatus, measuring a position of the signal generation apparatus by using a time difference between a reception time of the ultrasonic signal received from the signal generation apparatus in an effective section where the signal generation control signal is output to the signal generation apparatus and an output time of the signal generation control signal and generating position information; and (d) the information input apparatus, determining that interference of the ultrasonic signal occurs and changing the effective section if a great change in position occurs by a predetermined distance or more as a result of comparison of the position of the signal generation apparatus measured in step (c) with a position of the signal generation apparatus measured in the previous time period. - View Dependent Claims (41, 42)
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43. (canceled)
Specification