Charging apparatus and wireless charging apparatus

• US 9,455,585 B2
• Filed: 06/02/2014
• Issued: 09/27/2016
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Park, Yong Woon
• Primary Examiner(s): Garbowski, Leigh
• Application Number:
  US14/293,760
• Publication Number:
  US 20150180253A1
• Time in Patent Office: 848 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

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.

Claims

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.