Electric Field Sensor Device, Transceiver, Positional Information Obtaining System, and Information Input System
First Claim
1. An information input system comprising:
- electric field inducing means that is contacted or operated by an electric field transmission medium, and induces an electric field in said electric field transmission medium according to a physical quantity based on the contact or operation;
a transceiver that receives the electric field induced in said electric field transmission medium, applies the electric field to a polarization modulator or an optical intensity modulator, polarization-modulates or optical intensity-modulates laser light according to the electric field, converts the polarization-modulated or optical intensity-modulated laser light into an electric signal, extracts an electric signal having a frequency component concerning a physical quantity based on said contact or operation from the converted electric signals, and outputs the electric signal concerning the physical quantity based on said contact or operation; and
information processing means for inputting therein the electric signal concerning the physical quantity based on said contact or operation from said transceiver, and obtaining information corresponding to the physical quantity based on said contact or operation by said electric field transmission medium.
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Accused Products
Abstract
When a human hand (100) holds a transceiver (3a), the hand holds a bottom of an external wall surface and a side of the external wall surface of an insulating case (33). Therefore, a transmitting and receiving electrode (105) and an insulating film (107) cover not only the bottom of the external wall surface but also the side of the external wall surface of the insulating case (33). A first ground electrode (131), a second ground electrode (161), and a third ground electrode (163) are attached to upper portions of the internal wall surface of the insulating case (33) apart from the transmitting and receiving electrode (105). An insulating foam member (7a) is interposed between the insulating case (33) and a transceiver main body (30), and an insulating foam member (7b) is interposed between the transceiver main body (30) and a battery (6).
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Citations
9 Claims
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1. An information input system comprising:
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electric field inducing means that is contacted or operated by an electric field transmission medium, and induces an electric field in said electric field transmission medium according to a physical quantity based on the contact or operation; a transceiver that receives the electric field induced in said electric field transmission medium, applies the electric field to a polarization modulator or an optical intensity modulator, polarization-modulates or optical intensity-modulates laser light according to the electric field, converts the polarization-modulated or optical intensity-modulated laser light into an electric signal, extracts an electric signal having a frequency component concerning a physical quantity based on said contact or operation from the converted electric signals, and outputs the electric signal concerning the physical quantity based on said contact or operation; and information processing means for inputting therein the electric signal concerning the physical quantity based on said contact or operation from said transceiver, and obtaining information corresponding to the physical quantity based on said contact or operation by said electric field transmission medium.
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2. An electric field sensor device that modulates optical intensity of laser light based on an electric field to be detected, thereby detecting said electric field, said electric field sensor device having an electric field sensor unit and a light receiving circuit, wherein said electric field sensor unit includes:
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laser light emitting means; branching means for branching a laser light emitted from said laser light emitting means into a first laser light and a second laser light that are different from each other; and optical intensity modulating means with which said electric field to be detected is coupled, that modulates the optical intensity of said first laser light based on said coupled electric field, and said light receiving circuit includes; first light/voltage converting means for converting the optical intensity of said first laser light modulated by said optical intensity modulating means into a voltage signal; second light/voltage converting means for converting the optical intensity of said second laser light branched by said branching means into a voltage signal; and differential amplifying means for differentially amplifying the voltage signal obtained by conversion by said first light/voltage converting means and the voltage signal obtained by conversion by said second light/voltage converting means. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification