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US 6,265,789 B1Granted
Electronic apparatus
AssigneeSeiko Epson Corporation
InventorsKatsuyuki Honda, Motomu Hayakawa, Ichiro Aoshima, Hidetoshi Matsuki
Life of this patent
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Abstract
In at least two separated devices, a data transmission or a power transmission is performed through the electromagnetic coupling of coils which are arranged in mutually facing positions in the respective devices. In order to reduce the effect of a displacement between two coils even if the two coils are displaced from each other, the inner diameter of a coil 110 on the side of a station, as a primary coil, for performing the data transmission or the power transmission, is set to be larger than the inner diameter of a coil 210 on a watch side, as a secondary coil, by at least 1 mm.
Claims17
An electronic apparatus for performing a power or signal transmission between two devices, comprising:
- a first device having a first coil;
- and
- a second device having a second coil, the first and second coils being arranged in mutually facing positions;
- wherein an inner diameter of the first coil and an inner diameter of the second coil differ by at least 1 mm;
- wherein a ratio of the inner diameter of the first coil to an outer diameter of the first coil and a ratio of the inner diameter of the second coil to an outer diameter of the second coil are each greater than or equal to 0.3 and less than or equal to 0.7;
- and
- wherein power transmission or signal transmission between the first and second devices is accomplished through electromagnetic coupling of the first and second coils.
4 more elements
An electronic apparatus comprising:
- a charging device and a charged device;
- wherein the charging device comprises a first coil arranged in a position facing the charged device, and a charging circuit for supplying a signal to the first coil;
- wherein the charged device comprises a second coil arranged in a position facing the charging device, a rectifier circuit for rectifying a signal induced in the second coil, and a storage circuit for performing charging based on a signal rectified by the rectifier circuit;
- wherein an inner diameter of the first coil and an inner diameter of the second coil differ by at least 1 mm;
- wherein a ratio of the inner diameter of the first coil to an outer diameter of the first coil and a ratio of the inner diameter of the second coil to an outer diameter of the second coil are each greater than or equal to 0.3 and less than or equal to 0.7;
- and
- wherein a ratio of the outer diameter of the first coil to the outer diameter of the second coil is greater than or equal to 0.7 and less than or equal to 1.3.
4 more elements
An electronic apparatus comprising:
- a first device and a second device;
- wherein the first device comprises a first coil arranged in a position facing the second device, and a receiver circuit for receiving a signal induced in the first coil;
- wherein the second device comprises a second coil arranged in a position facing the first device, and a transmitter circuit for supplying the second coil with a signal to be transmitted to the first device;
- wherein an inner diameter of the first coil and an inner diameter of the second coil differ by at least 1 mm;
- wherein a ratio of the inner diameter of the first coil to an outer diameter of the first coil and a ratio of the inner diameter of the second coil to an outer diameter of the second coil are each greater than or equal to 0.3 and less than or equal to 0.7;
- and
- wherein a ratio of the outer diameter of the first coil to the outer diameter of the second coil is greater than or equal to 0.7 and less than or equal to 1.3.
4 more elements
An electronic apparatus comprising:
- at least two separated electronic devices, each having at least one coil in a position mutually facing the coil of the other device, for performing a signal or power transmission in a non-contact fashion through electromagnetic induction or electromagnetic coupling between the coils of the separated devices;
- and
- a member formed of an insulating material and a metal and arranged so that the insulating material of the member is positioned on an external surface of at least one of the coils facing the other coil;
- wherein a ratio of an inner diameter to an outer diameter of the at least one coil of one of the devices and a ratio of an inner diameter to an outer diameter of the at least one coil of another of the devices are each greater than or equal to 0.3 and less than or equal to 0.7.
1 more element
An electronic apparatus comprising:
- at least two separated electronic devices, each having at least one coil in a position mutually facing the coil of the other device, for performing a signal or power transmission in a non-contact fashion through electromagnetic induction or electromagnetic coupling between the coils of the separated devices;
- and
- an insulating member arranged on an external surface of at least one of the coils facing the other coil;
- wherein a ratio of an inner diameter to an outer diameter of the at least one coil of one of the devices and a ratio of an inner diameter to an outer diameter of the at least one coil of another of the devices are each greater than or equal to 0.3 and less than or equal to 0.7.
1 more element
Dependencies are inferred from the claim text.