Du U Li

US Patent:

6697840, Feb 24, 2004

Filed:

Feb 29, 2000

Appl. No.:

09/515737

Inventors:

Patrice Ismael Godefroid - Naperville IL
James David Herbsleb - Naperville IL
Lalita Jategaonkar Jagadeesan - Naperville IL
Du Li - Los Angeles CA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G06F 1516

US Classification:

709205, 709204, 709227, 709224

Abstract:

Presence awareness initiatives are implemented in a collaborative system that enables a user to set presence awareness policies, and that provides a reasonably high assurance that the system will correctly implement those policies. Specifically, the collaborative presence awareness system is such as to enable users to specify complex presence awareness policies. The presence awareness system is also such as to have been verified by employing systematic state-space exploration tools to establish a high level of assurance that the presence awareness system has the capability to implement correctly, substantially all possible presence awareness policies. Further, in accordance with another aspect of the invention, the presence awareness policy specifications are modular relative to the rest of the presence awareness system, and can be modified without having to modify computational modules or user interface program code of the presence awareness system. In accordance with another aspect of the invention, a user has the capability to update his or her presence information. In accordance with still another aspect of the invention, the system automatically collects presence information about the user and automatically updates his or her presence information.

US Patent:

20140176060, Jun 26, 2014

Filed:

Jul 2, 2013

Appl. No.:

13/934165

Inventors:

- Westlake Village CA, US
Leon ALKALAI - Studio City CA, US
Donald HUNTER - La Verne CA, US
Du LI - Oak Park CA, US
Noam LOTAN - Westlake Village CA, US

International Classification:

H02J 7/02
H02J 7/00

US Classification:

320108, 320137

Abstract:

In some embodiments, the charging magnetic field produced in an air gap within an inductive charger for a hearing aid or other miniature device is shaped by lateral protrusions, which draw the magnetic field away from a body of a device battery situated behind a receiver inductor. Shaping the magnetic field allows reducing the magnetic field flux intercepted by the battery (rater than the receiver inductor), reducing the inductive heating of the battery. A charging element produces a high-frequency, 120 kHz, magnetic field inside the gap in which the hearing aid or other device is inserted to charge its battery. A loosely-coupled magnetic transformer circuit forms a resonant tank circuit that is excited, by a feedback control circuit, at its resonant frequency to ensure power transfer across the large gap regardless of the dimensional variations of the gap and the relative position of the hearing aid in the gap.