The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10955888 B1

Date of Patent:

Mar. 23, 2021

Filed:

Aug. 15, 2018

Universal serial bus device and method for dynamically defining a power source or sink status for downstream facing ports

Applicant:

Via Labs, Inc., New Taipei, TW;

Inventors:

Tze-Shiang Wang, New Taipei, TW;

Chi-Yuan Kao, New Taipei, TW;

Assignee:

VIA LABS, INC., New Taipei, TW;

Attorney:

JCIPRNET

Primary Examiner:

Ji H Bae

Int. Cl.

CPC ...

G06F 1/26 (2006.01); G06F 13/42 (2006.01); G06F 13/38 (2006.01); G06F 13/40 (2006.01);

U.S. Cl.

CPC ...

G06F 1/266 (2013.01); G06F 13/382 (2013.01); G06F 13/4282 (2013.01); G06F 1/26 (2013.01); G06F 1/263 (2013.01); G06F 13/4022 (2013.01);

Abstract

The present invention provides a universal serial bus (USB) device and an operating method thereof. The USB device includes a plurality of Downstream Facing Ports (DFPs) and a control circuit. When a first external device is connected to the first DFP and the second DFP is not connected to any external device, the control circuit maintains the first DFP as one of a power source port and a power sink port according to the first external device, and maintains the second DFP as other one of the power source port and the power sink port regardless of whether the second DFP is connected to a second external device later until the first external device is removed from the first DFP.

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