# US 10,312,719 B2 · Wirelessly transmitting power from a first transceiver to a second transceiver in a computing device using pivoting hinges

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- Number: US 10,312,719 B2
- Document ID: US10312719B2
- Status: Granted
- Kind: B2
- Application number: 15/403,387
- Filed: 2017-01-11
- Published: 2018-07-12
- Granted: 2019-06-04
- Earliest claimed: 2017-01-11
- Assignees: Dell Products L.P.
- Applicants: Dell Products L. P.
- Inventors: Jace W. Files; John Trevor Morrison; Gerald R. Pelissier
- Web page: https://patentgrep.com/patent/US10312719B2

## CPC

- H04B 5/79: for data transfer in combination with power transfer
- G06F 1/1618: {the display being foldable up to the back of the other housing with a single degree of freedom, e.g. by 360° rotation over the axis defined by the rear edge of the base enclosure}
- G06F 1/1647: {including at least an additional display (G06F1/1692 takes precedence)}
- G06F 1/1681: {Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683)}
- G06F 1/1683: {for the transmission of signal or power between the different housings, e.g. details of wired or wireless communication, passage of cabling}
- G06F 1/266: {Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips}
- H02J 50/12: of the resonant type
- H04B: TRANSMISSION
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

A computing device may include a first housing attached to a second housing by one or more hinges. A second power transceiver in the second housing may receive power from a power source and wirelessly transmit the power to a first power transceiver in the first housing. The first power transceiver may distribute the power to a first display device and to a computer motherboard located in the first housing. The first power transceiver may include first magnets positioned to attract second magnets in the second power transceiver. Each power transceiver may include a bearing on either end that enables each power transceiver to rotate, such that a first coil of the first power transceiver is in a line of sight of a second coil of the second power transceiver, regardless of an orientation of the computing device.

## Claims

### Claim 1

A computing device comprising:
a first housing comprising:
a computer motherboard; and
a first power transceiver to receive wirelessly transmitted power;
a power bus to distribute power from the first power transceiver to the computer motherboard;
a second housing comprising:
a power source; and
a second power transceiver to wirelessly transmit power from the power source to the first power transceiver; and
one or more hinges to rotatably couple the first housing to the second housing;
wherein the first power transceiver and the second power transceiver each comprise:
a circuit board comprising a coil;
a first pivot comprising:
a first slot to receive a first end of the circuit board;
a first cylindrical protrusion over which a first toroidal-shaped bearing is placed; and
a first cylindrical cavity into which is placed a first cylindrical-shaped magnet;
a second pivot comprising:
a second slot to receive a second end of the circuit board;
a second cylindrical protrusion over which a second toroidal-shaped bearing is placed; and
a second cylindrical cavity into which is placed a second cylindrical-shaped magnet.

### Claim 2 (depends on 1)

The computing device of claim 1, wherein electrical power is wirelessly transmitted the from the first power transceiver to the second power transceiver at a frequency of between:
about 100 Kilohertz (KHz) to about 300 KHz; or
about 4 Megahertz (MHz) to about 8 MHz.

### Claim 3 (depends on 1)

The computing device of claim 1, wherein the first power transceiver and the second power transceiver each further comprise:
a ferrite plate located behind the circuit board; and
a metal plate located behind the ferrite plate.

### Claim 4 (depends on 1)

The computing device of claim 1, wherein:
a first set of magnets is located in the first power transceiver and face outward with a first polarity; and
a second set of magnets is located in the second power transceiver and face outward with a reverse polarity as compared to the first polarity, causing the first set of magnets to have an attraction to the second set of magnets.

### Claim 5 (depends on 1)

The computing device of claim 1, wherein the computer motherboard further comprises:
at least one central processing unit (CPU);
a graphics processing unit (GPU); and
one or more memory storage devices; and
one or more input/output (I/O) ports.

### Claim 6 (depends on 5)

The computing device of claim 5, further comprising:
a first display device in the first housing connected to a first video signal from an embedded DisplayPort (eDP) output of the GPU to; and
to a second display device in the second housing connected to a second video signal from a DisplayPort (DP) output of the GPU.

### Claim 7 (depends on 1)

The computing device of claim 1, wherein:
the first power transceiver is enclosed in a first enclosure having a first clear window; and
the second power transceiver is enclosed in a second enclosure having a second clear window to enable a first coil of the first power transceiver to be approximately parallel to a second coil of the second power transceiver.

### Claim 8

A method comprising:
receiving, by a first power transceiver, electrical power from a power source, the first power transceiver located behind a first display device in a first housing of a computing device;
wirelessly transmitting the electrical power from the first power transceiver to a second power transceiver, the second power transceiver located behind a second display device in a second housing that is rotatably attached to the first housing by one or more hinges; and
sending the electrical power from the second power transceiver to a computer motherboard located in the second housing.

### Claim 9 (depends on 8)

The method of claim 8, wherein wirelessly transmitting the electrical power from the first power transceiver to the second power transceiver comprises one of:
wirelessly transmitting the electrical power from the first power transceiver to the second power transceiver at a frequency of between about 100 Kilohertz (KHz) and about 300 KHz; or
wirelessly transmitting the electrical power from the first power transceiver to the second power transceiver at a frequency of between about 4 Megahertz (MHz) to 8 MHz.

### Claim 10 (depends on 8)

The method of claim 8, wherein the computer motherboard comprises:
a graphics processing unit (GPU) comprising a DisplayPort (DP) output connected to the first display device and an embedded DisplayPort (eDP) output connected to the second display device;
at least one central processing unit (CPU);
one or more memory storage devices; and
one or more input/output (I/O) ports.

### Claim 11 (depends on 8)

The method of claim 8, wherein:
the first power transceiver comprises:
a first circuit board comprising a first coil;
a first set of magnets facing outward with a first polarity; and
a first pair of bearings that enable the first circuit board to rotate; and
the second power transceiver comprises:
a second circuit board comprising a second coil;
a second set of magnets facing outward with a reverse polarity that has a magnetic attraction to the first set of magnets; and
a second pair of bearings that enable the second circuit board to rotate.

### Claim 12 (depends on 11)

The method of claim 11, wherein the magnetic attraction between the first set of magnets and the second set of magnets causes:
the first power transceiver to rotate within the first pair of bearings;
the second power transceiver to rotate within the second pair of bearings; and
the first coil to remain facing the second coil regardless of an orientation of the computing device.

### Claim 13 (depends on 11)

The method of claim 11, wherein:
the first power transceiver further comprises:
a first ferrite plate located behind the first circuit board;
a first metal plate located behind the first ferrite plate;
a first enclosure having a first clear window; and
the second power transceiver comprises:
a second ferrite plate located behind the second circuit board;
a second metal plate located behind the second ferrite plate; and
a second enclosure having a second clear window, wherein the first coil of the first power transceiver is within a line of sight of the second coil of the second power transceiver.

### Claim 14

A computing device comprising:
a first housing comprising:
a first power transceiver to receive wirelessly transmitted power from a second power transceiver, wherein the first power transceiver comprises:
a first circuit board comprising a first coil;
a first set of magnets facing outward with a first polarity; and
a first pair of bearings, wherein each bearing of the first pair of bearings is located on either end of the first power transceiver; and
a power bus to distribute power from the first power transceiver to a computer motherboard;
a second housing comprising:
the second power transceiver, wherein the second power transceiver wirelessly transmit power from a power source to the first power transceiver, wherein the second power transceiver comprises:
a second circuit board comprising a second coil;
a second set of magnets facing outward with a reverse polarity that has a magnetic attraction to the first set of magnets; and
a second pair of bearings, wherein each bearing of the second pair of bearings is located on either end of the first power transceiver; and
one or more hinges to rotatably couple the first housing to the second housing.

### Claim 15 (depends on 14)

The computing device of claim 14, wherein the computer motherboard comprises:
a graphics processing unit (GPU) comprising a DisplayPort (DP) output connected to a first display device and an embedded DisplayPort (eDP) output connected to a second display device;
at least one central processing unit (CPU);
one or more memory storage devices; and
one or more input/output (I/O) ports.

### Claim 16 (depends on 14)

The computing device of claim 14, wherein the magnetic attraction between the first set of magnets and the second set of magnets causes:
the first power transceiver to rotate within the first pair of bearings;
the second power transceiver to rotate within the second pair of bearings; and
the first coil to remain facing the second coil regardless of an orientation of the computing device.

### Claim 17 (depends on 16)

The computing device of claim 16, wherein:
the first power transceiver further comprises:
a first ferrite plate located behind the first circuit board; and
a first metal plate located behind the first ferrite plate, wherein the first metal plate comprises a copper alloy; and
the second power transceiver further comprises:
a second ferrite plate located behind the second circuit board; and
a second metal plate located behind the second ferrite plate; and
the first metal plate and the second metal plate each comprises a copper alloy.

### Claim 18 (depends on 14)

The computing device of claim 14, wherein:
the first housing further comprises:
a computer motherboard that includes a graphics processing unit (GPU); and
a first display device connected to an embedded DisplayPort (eDP) output of the GPU; and
the second housing further comprises:
a second display device connected to a DisplayPort (DP) output of the GPU.

### Claim 19 (depends on 18)

The computing device of claim 18, wherein the second housing further comprises:
a battery; and
a battery charger to:
receive power from a source external to the computing device; and
charge the battery.

### Claim 20 (depends on 14)

The computing device of claim 14, further comprising:
a first enclosure in which the first power transceiver is enclosed, the first enclosure having a first clear window; and
a second enclosure in which the second power transceiver is enclosed, the second enclosure having a second clear window to enable the first coil of the first power transceiver to be in a line of sight of the second coil of the second power transceiver.