CHARGING PORT

• US 20130154551A1
• Filed: 09/02/2010
• Published: 06/20/2013
• Est. Priority Date: 09/02/2010
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Jeansonne, Jeffrey Kevin, Sawyers, Thomas P., Fry, Walter G., Lakdawala, Rahul V.
• Granted Patent: US 9,197,075 B2
• Time in Patent Office: Days
• US Class Current: 320/107
• CPC Class Codes: 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
• CPC Class Codes: G06F 2213/0038 System on Chip
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A computing system including a port to provide power to a portable device. The power state of the computing system is determined and the type of charging port to provide can be based on the power state of the computing system.

Claims

1. A computing system comprising:

a port to communicate data and to provide power to a portable device;

a power source to provide a current to the portable device;

a signal generator to provide a signal indicating the power state of the computing system; and

a controller to receive the signal and determine the type of charging port for the portable device based on the power state of the computing system.

2. The system of claim 1, wherein the controller provides a handshake that if completed with the portable device the portable device can draw an increased amount of current than if the handshake is not completed.

3. The system of claim 2, wherein the current supplied by the power supply increases if the controller completes the handshake.

4. The system of claim 1, wherein the port is identified as a dedicated charging port by the portable device if a handshake is completed with the portable device and the signal indicates a low power state.

5. The system of claim 4, wherein signal lines and power lines of the port are configured in a manner that the portable device recognizes the port as a dedicated charging port.

6. The system of claim 1, wherein if the port is configured to allow the portable device connected to the port to wake the computing system from a low power state the port cannot be a dedicated charging port.

7. The system of claim 1, wherein the port is identified as a charging downstream port by the portable device if a handshake is completed and the computing system is in a working power state.

8. The system of claim 7, wherein the computing system communicates data with the portable device through the port if the port is a charging downstream port.

9. The system of claim 1, further comprising a battery threshold controller to disable handshake for one of the dedicated charging port, the dedicated charging port or both if the if the battery capacity is below a threshold.

10. A method of charging a portable device from a computing system:

determining the power state of the computing system;

providing power to a port of the computing system for charging an portable device;

adjusting the type of power charging port based on the power state of the computing system.

11. The method of claim 10, wherein the type of power charging port is selected from at least a Dedicated charging port, a Charging Downstream Port and a Standard Downstream Port.

12. The method of claim 11, further comprising selecting a battery threshold and disabling the Dedicated Charging port, the Charging Downstream Port handshake protocols.

13. The method of claim 11, further comprising proving a handshake protocol for communication with an portable device.

14. The method of claim 10, further comprising first type of power charging port wherein data is communicated from the port to an portable device and a second type of power charging port wherein the configuration of the data line prevents a handshake.

15. A computer readable medium comprising code that if executed causes a computing system to:

determine a power state of the computing system;

provide a dedicated charging port in a low power state; and

provide a charging downstream port in a working state.