Device and method for charging an OTG portable device

• US 20060145666A1
• Filed: 07/11/2005
• Published: 07/06/2006
• Est. Priority Date: 12/31/2004
• Status: Abandoned Application

• Current Assignee: Ali SPA (Bessemer Group Incorporated)
• Original Assignee: Ali SPA (Bessemer Group Incorporated)
• Inventors: Liu, Chun-Chen
• Application Number:
  US11/177,422
• Publication Number:
  US 20060145666A1
• Time in Patent Office: Days
• US Class Current: 320/138
• CPC Class Codes: H02J 2207/30 Charge provided using DC bus or data bus of a computer
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 2310/22 The load being a portable electronic device
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

The present invention discloses a device and method for charging an OTG portable device, which is capable of charging the OTG portable device no matter it is acting as an OTG A-Device or as an OTG B-Device since the OTG portable device is able to change the status of the charging device thereof according to an operation performed by a control unit thereof for detecting whether there is a power signal provided from a Vbus of an apparatus connected to the I/O port of the OTG portable device, and consequently, the means for charging the OTG portable device of the invention are diversified.

Claims

1. A device for charging an OTG portable device, comprising:

a switch, for receiving a plurality of power signals from various external power sources and selectively outputting a power signal selected form the plural power signals;

a charging circuit, for receiving the power signal outputted from the switch while using the same for charging a battery of the OTG portable device; and

a control unit, for receiving an external data signal so as to control the selecting of the switch accordingly.

2. The device of claim 1, wherein the power signal is provided via a Vbus.

3. The device of claim 2, wherein the Vbus is embedded in a personal computer.

4. The device of claim 2, wherein the Vbus is embedded in another OTG portable device.

5. The device of claim 1, wherein the power signal is provided from an adapter.

6. The device of claim 1, wherein the control unit is the center processing unit of the OTG portable device.

7. A method for charging an OTG portable device, comprising:

making an evaluation to determine whether a Vbus is embedded in the apparatus connected to the OTG portable device;

switching the status of a charging device of the OTG portable device to be off while no Vbus is detected in the apparatus connected to the OTG portable device; and

switch on the charging device of the OTG portable device while a Vbus is detected in the apparatus connected to the OTG portable device.

8. The method of claim 7, further comprising the step of:

previously setting the status of charging device of the OTG portable device to be off.

9. The method of claim 7, further comprising the step of:

charging the battery of the OTG B-Device by the power signal provided from the Vbus of the apparatus connected thereto with the charging device