Charging apparatus and wireless charging apparatus

Patent metadata

Field	Value
Publication number	US-9455585-B2
Application number	US-201414293760-A
Country	US
Kind code	B2
Filing date	Jun 2, 2014
Priority date	Dec 20, 2013
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

A charging apparatus may include a power supply unit supplying charging power, a charging unit transferring the charging power from the power supply unit to an external charging target device, a charge controlling unit controlling a charging state of the charging unit, a display unit displaying the charging state according to controlling by the charge controlling unit and stopping a displaying operation when the charging target device is in a fully-charged state, and a delaying unit blocking a current supplied to the display unit and delaying the stopping of the displaying operation of the display unit for a preset time when the charging target device is recharged in the fully-charged state.

First claim

What is claimed is:

1. A charging apparatus comprising:
a power supply unit supplying charging power;
a charging unit transferring the charging power from the power supply unit to an external charging target device;
a charge controlling unit controlling a charging state of the charging unit;
a display unit displaying the charging state based on a control by the charge controlling unit and stopping a displaying operation when the charging target device is in a fully-charged state; and
a delaying unit blocking a current supplied to the display unit and delaying the stopping of the displaying operation of the display unit for a preset time when the charging target device is recharged in the fully-charged state,
wherein the display unit is a monochromatic light emitting diode,
wherein the delaying unit comprises:
a switch connected between a cathode of the monochromatic light emitting diode supplied with driving power and a ground in series;
a first resistor connected between a first control signal of the charge controlling unit and a drain of the switch;
a diode connected between the drain of the switch and the first resistor to transfer the control signal;
a second resistor connected between a second control signal of the charge controlling unit and a gate of the switch;
a capacitor connected between the gate of the switch and the second resistor; and
a third resistor connected between the gate of the switch and the ground, and

wherein the second resistor, the third resistor, and the capacitor determine the delay time together with a gate-source threshold voltage of the switch.

2. The charging apparatus of claim 1 , further comprising a detecting unit detecting a state of the charging power transferred from the power supply unit to the charging unit.

3. The charging apparatus of claim 1 , wherein the display unit emits light having a preset color while the charging target device is being charged and stops a light emission operation when the charging target device is fully charged.

4. A wireless charging apparatus comprising:
a power supply unit supplying charging power;
a charging unit transferring the charging power from the power supply unit to an external charging target device in a preset wireless scheme;
a charge controlling unit controlling a charging state of the charging unit;
a display unit displaying the charging state according to controlling by the charge controlling unit and stopping a displaying operation when the charging target device is in a fully-charged state; and
a delaying unit blocking a current supplied to the display unit and delaying the stopping of the displaying operation of the display unit for a preset time when the charging target device is recharged and is in the fully-charged state,
wherein the display unit is a monochromatic light emitting diode,
wherein the delaying unit comprises:
a switch connected between a cathode of the monochromatic light emitting diode supplied with driving power and a ground in series;
a first resistor connected between a first control signal of the charge controlling unit and a drain of the switch;
a diode connected between the drain of the switch and the first resistor to transfer the control signal;
a second resistor connected between a second control signal of the charge controlling unit and a gate of the switch;
a capacitor connected between the gate of the switch and the second resistor; and
a third resistor connected between the gate of the switch and the ground, and

wherein the second resistor, the third resistor, and the capacitor determine the delay time together with a gate-source threshold voltage of the switch.

5. The wireless charging apparatus of claim 4 , wherein the charging unit comprises:
a coil unit transferring the charging power to the charging target device according to a magnetic induction effect; and
a switching unit controlling a power transfer operation of the coil unit.

6. The wireless charging apparatus of claim 4 , further comprising a detecting unit detecting a state of the charging power transferred from the power supply unit to the charging unit.

7. The wireless charging apparatus of claim 4 , wherein the display unit emits light having a preset color while the charging target device is being charged and stops a light emission operation when the charging target device is fully charged.

Assignees

• Samsung Electro Mech

Inventors

• Park Yong Woon

Classifications

• H02J4/25

  for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system · CPC title

• H02J7/825 Primary

  Detection of fully charged condition · CPC title

• H02J50/12

  of the resonant type · CPC title

• H02J7/02

  for charging batteries from AC mains by converters · CPC title

• H02J7/80 Primary

  including monitoring or indicating arrangements · CPC title