WIRELESS SENSOR DEVICE
First Claim
Patent Images
1. A wireless sensor device comprising:
- a substrate provided with a circuit;
an antenna circuit for transmission and reception of radio waves, wherein the antenna circuit is formed on the substrate;
a battery for storing electrical energy obtained from the radio waves;
an image pickup device over the substrate; and
a package packing the substrate, the antenna circuit, the battery and the image pickup device,wherein the substrate is over the battery, andwherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit.
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Abstract
A wireless sensor device capable of constant operation without replacement of batteries. The wireless sensor device is equipped with a rechargeable battery and the battery is recharged wirelessly. Radio waves received at an antenna circuit are converted into electrical energy and stored in the battery. A sensor circuit operates with the electrical energy stored in the battery, and acquires information. Then, a signal containing the information acquired is converted into radio waves at the antenna circuit, whereby the information can be read out wirelessly.
42 Citations
14 Claims
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1. A wireless sensor device comprising:
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a substrate provided with a circuit; an antenna circuit for transmission and reception of radio waves, wherein the antenna circuit is formed on the substrate; a battery for storing electrical energy obtained from the radio waves; an image pickup device over the substrate; and a package packing the substrate, the antenna circuit, the battery and the image pickup device, wherein the substrate is over the battery, and wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit. - View Dependent Claims (3, 5, 7, 9, 11, 13)
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2. A wireless sensor device comprising:
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a substrate provided with a circuit; a first antenna circuit formed on the substrate; a second antenna circuit formed on the substrate; a battery; an image pickup device over the substrate; and a package packing the substrate, the first antenna circuit, the second antenna circuit, the battery and the image pickup device, wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, wherein the substrate is over the battery, wherein radio waves are converted into electrical energy at the first antenna circuit; wherein the electrical energy is stored in the battery after rectified by the rectifier circuit; and wherein radio waves containing information of an image acquired by the image pickup device are radiated from the second antenna circuit. - View Dependent Claims (4, 6, 8, 10, 12, 14)
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Specification