# US 2021/0281110 A1 · Wireless charging pad

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- Number: US 2021/0281110 A1
- Document ID: US20210281110A1
- Status: Published application
- Kind: A1
- Application number: 16/929,114
- Filed: 2020-07-15
- Published: 2021-09-09
- Earliest claimed: 2020-03-06
- Assignees: Dexin Electronic Ltd.; Dexin Corporation
- Applicants: Dexin Electronic Ltd.; Dexin Corporation
- Inventors: HO-LUNG LU; HSIU-HSUAN LIN
- Web page: https://patentgrep.com/patent/US20210281110A1

## CPC

- H02J 50/12: of the resonant type
- G06F 3/038: Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F 3/0395: {Mouse pads}
- H01F 27/02: Casings
- H01F 38/14: Inductive couplings
- H02J 7/70: characterised by the mechanical construction
- H02J 50/005: {Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices}
- H02J 50/10: using inductive coupling
- G06F 2203/0384: Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices
- H01F 27/366: {made of ferromagnetic material}
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A wireless charging pad including a substrate, a circuit board, a coil module, and a colloid is provided. The circuit board and the coil module are disposed on the substrate. The circuit board includes a control circuit and a voltage conversion circuit. The control circuit is electrically connected to the voltage conversion circuit and the coil module is electrically connected to the voltage conversion circuit. A colloid encapsulates the substrate, the circuit board, and the coil module, and the colloid has a flat appearance.

## Claims

### Claim 1

A wireless charging pad, comprising:
a substrate;
a circuit board disposed on the substrate, the circuit board including a control circuit and a voltage conversion circuit, wherein the control circuit is electrically connected to the voltage conversion circuit;
a coil module disposed on the substrate and electrically connected to the voltage conversion circuit; and
a colloid, the colloid encapsulating the substrate, the circuit board and the coil module, wherein an appearance of the colloid is flat.

### Claim 2 (depends on 1)

The wireless charging pad according to claim 1, wherein the colloid has a thickness, and the thickness is smaller than or equal to 3 mm.

### Claim 3 (depends on 1)

The wireless charging pad according to claim 1, wherein the wireless charging pad further includes a port, and the port is disposed on the substrate to be connected to an external power.

### Claim 4 (depends on 1)

The wireless charging pad according to claim 1, wherein the circuit board further includes a communication module, and the communication module is disposed on the substrate and electrically connected to the control circuit.

### Claim 5 (depends on 1)

The wireless charging pad according to claim 1, wherein the coil module has a coil, a coil substrate, and a magnetic permeable board.

### Claim 6 (depends on 1)

The wireless charging pad according to claim 1, wherein the wireless charging pad further includes a battery, the battery is disposed on the substrate and electrically connected to the control circuit and the coil module, and when an induction current is induced by the coil, the control circuit controls the voltage conversion circuit, such that the electricity converted from the induced current is stored in the battery.

### Claim 7 (depends on 1)

The wireless charging pad according to claim 1, wherein the wireless charging pad is a soft pad, and the colloid is a soft colloid.

### Claim 8 (depends on 1)

The wireless charging pad according to claim 1, wherein the wireless charging pad further includes a thin film material layer disposed on a surface of the colloid.

### Claim 9 (depends on 1)

The wireless charging pad according to claim 1, wherein the wireless charging pad is a mouse pad.

### Claim 10 (depends on 1)

The wireless charging pad according to claim 1, further including a flat substrate disposed adjacent to a side of the colloid.