Power transmission circuit
First Claim
1. A power transmission circuit for transmitting power from a transmitting board side to a receiving board side in an non-contact manner, comprising:
- a transmitting board including a first insulating board, on which an alternating current power signal generator and transmitting side capacitive coupling electrodes connected with an output of the alternating current power signal generator are provided; and
a receiving board including a second insulating board, on which receiving side capacitive coupling electrodes, a rectifier, a constant voltage circuit, and a load are provided,wherein the transmitting side capacitive coupling electrodes and the receiving side capacitive coupling electrodes serve as a pair of capacitors in which the transmitting side capacitive coupling electrodes and the receiving side capacitive coupling electrodes are stacked through an insulating layer, andWherein the rectifier rectifies an electric current from the pair of capacitors, and the rectified electric current is sequentially inputted to the constant voltage circuit and the load.
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Accused Products
Abstract
Provided is a capacitor coupling type power transmission circuit in which a variation in receiving side voltage due to a variation in capacitance is suppressed to prevent an influence on a variation in load current in a display panel. An insulating board of the display panel is sandwiched by capacitive coupling electrodes formed on each of a transmitting side board and a board of the display panel, thereby forming capacitors. A non-contact transmission is performed by the capacitors. An alternating current voltage signal obtained by electrodes on a display panel side is rectified by a rectifier including diodes. A constant voltage circuit which is a shunt regulator including a diode array in which a resistor and a plurality of diodes are connected in series is provided to maintain a stabilized voltage irrespective of a variation in load in the display panel.
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Citations
8 Claims
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1. A power transmission circuit for transmitting power from a transmitting board side to a receiving board side in an non-contact manner, comprising:
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a transmitting board including a first insulating board, on which an alternating current power signal generator and transmitting side capacitive coupling electrodes connected with an output of the alternating current power signal generator are provided; and a receiving board including a second insulating board, on which receiving side capacitive coupling electrodes, a rectifier, a constant voltage circuit, and a load are provided, wherein the transmitting side capacitive coupling electrodes and the receiving side capacitive coupling electrodes serve as a pair of capacitors in which the transmitting side capacitive coupling electrodes and the receiving side capacitive coupling electrodes are stacked through an insulating layer, and Wherein the rectifier rectifies an electric current from the pair of capacitors, and the rectified electric current is sequentially inputted to the constant voltage circuit and the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification