David C Lukofsky

US Patent:

20170250556, Aug 31, 2017

Filed:

Feb 26, 2016

Appl. No.:

15/055479

Inventors:

Jonathan Alan Dutra - Saratoga CA, US
Junius Mark Penny - Ben Lomond CA, US
David Carl Wyland - Richmond CA, US
David Lukofsky - San Francisco CA, US
Agustya Ruchir Mehta - Mountain View CA, US

International Classification:

H02J 7/00

Abstract:

A dynamic power control circuit is provided. The control circuit can detect the presence of the external power source as well as detect one or more conditions of the device. For instance, the control circuit can detect a voltage difference between a first node coupling a first power output and a system circuit and a second node coupling a second power output and the batteries. The control circuit can also detect the activation or deactivation of the external power source. Based on the inputs, the control circuit can cause the controlled resistor to dynamically adjust a level of impedance between the first node and the second node. The controlled impedance between the first node and the second node enables the system circuit to dynamically utilize power supplied by the external power source as well as power supplied by the batteries.

US Patent:

20170214239, Jul 27, 2017

Filed:

Jan 26, 2016

Appl. No.:

15/007171

Inventors:

Jonathan Alan Dutra - Saratoga CA, US
Scott Francis Fullam - Palo Alto CA, US
Agustya Ruchir Mehta - Mountain View CA, US
Junius Mark Penny - Ben Lomond CA, US
David Lukofsky - San Francisco CA, US

International Classification:

H02H 3/38

Abstract:

An enhanced parallel protection circuit is provided. A system using separate battery packs in a parallel configuration is arranged with multiple protection circuit modules (PCMs). The PCMs are configured to detect fault conditions, such as over voltage, under voltage, excess current, excess heat, etc. Individual PCMs can be configured to control associated switches and/or other components. When a fault condition is detected by an individual PCM, the individual PCM triggers one or more associated switches to shut down one or more components. In addition, by the use of the techniques disclosed herein, the individual PCM can also trigger switches that are controlled by other PCMs. Configurations disclosed herein mitigate occurrences where a multi-PCM device is operating after at least one PCM has shut down. Configurations disclosed herein provide safeguards and redundant protection in scenarios where a fault event is detected by one PCM and not detected by another PCM in a parallel configuration.

US Patent:

20150276976, Oct 1, 2015

Filed:

Jun 15, 2015

Appl. No.:

14/739526

Inventors:

- Cupertino CA, US
Anant Rai - San Jose CA, US
David Lukofsky - San Jose CA, US

International Classification:

G01V 8/00
G06F 3/044
G06F 3/03

Abstract:

An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to user hair color and smudges on the proximity sensor can be accommodated by using an electrical sensing mechanism in addition to the light sensing mechanism. The proximity sensor may include a pair of capacitive electrodes for generating an electric field in the vicinity of the device. The presence of a user's head can sufficiently disturb the electric field so as to produce data indicative of the presence of the user's head.

US Patent:

20140213323, Jul 31, 2014

Filed:

Jan 25, 2013

Appl. No.:

13/750961

Inventors:

- Cupertino CA, US
Anant Rai - San Jose CA, US
David Lukofsky - San Jose CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H03K 17/955

US Classification:

455566, 327517

Abstract:

An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to user hair color and smudges on the proximity sensor can be accommodated by using an electrical sensing mechanism in addition to the light sensing mechanism. The proximity sensor may include a pair of capacitive electrodes for generating an electric field in the vicinity of the device. The presence of a user's head can sufficiently disturb the electric field so as to produce data indicative of the presence of the user's head.