Alejandro G Lopez

US Patent:

20120112636, May 10, 2012

Filed:

Jun 30, 2010

Appl. No.:

13/384005

Inventors:

Yuhong Fang - Naperville IL, US
Sree Venkit - Naperville IL, US
Sanjaya Kumar Pradhan - Des Plaines IL, US
Alejandro Lopez - Lake Zurich IL, US
George Grouev - Lake Zurich IL, US
Arun Ganesh - Aurora IL, US
Bruce Rhodes - Inverness IL, US

Assignee:

KONINKLIJKE PHILIPS ELECTRONICS N.V. - EINDHOVEN

International Classification:

H05B 41/298

US Classification:

315116

Abstract:

An electronic ballast and startup method including an electronic ballast operably connected to a lamp having a lamp filament, the electronic ballast having a timer () generating an inverter control signal () and a preheat control signal (); a converter () receiving AC power and generating DC power (); a self-oscillating inverter () receiving DC power () and being operable to provide lamp power () to the lamp, the self-oscillating inverter () being responsive to the inverter control signal (); and a filament preheater () receiving DC power () and being operable to provide filament power () to the lamp filament, the filament preheater () being responsive to the preheat control signal (). When AC power is initially applied, preheat control signal () directs the filament preheater () to provide filament power (), and inverter control signal () directs the self-oscillating inverter () not to provide lamp power ().

US Patent:

20230067380, Mar 2, 2023

Filed:

Aug 31, 2022

Appl. No.:

17/823697

Inventors:

- San Francisco CA, US
Alejandro Lopez - Van Nuys CA, US
Brady Sammons - Walnut Creek CA, US
Yenjui Liu - Pleasanton CA, US
Namrata Mehta - Milpitas CA, US

International Classification:

G06F 3/0482
G06F 16/248
G06F 9/451
G06F 3/04847

Abstract:

Disclosed are some implementations of systems, apparatus, methods and computer program products for executing process flows. A graphical representation of a flow is provided for presentation via a display device, where the flow includes a plurality of elements, each of the elements corresponding to a set of computer-readable instructions. A set of metrics associated with the flow is generated or updated, where the set of metrics indicates, for each of a plurality of paths of the flow, one or more metrics collected across a plurality of users of the database system that accessed the flow, each of the paths of the flow corresponding to a subset of the plurality of elements of the flow. An indication of the set of metrics associated with the flow is provided, for presentation via the display device, in relation to one or more elements of the flow such that at least a first portion of the set of metrics is provided for presentation in close proximity to a visual representation of a first one of the elements of the flow and a second portion of the set of metrics is provided for presentation in close proximity to a visual representation of a second one of the elements of the flow. A request to modify the flow is processed and the graphical representation of the flow is modified responsive to processing the request to modify the flow. In addition, a modified flow corresponding to the modified graphical representation can be stored.

US Patent:

20170171933, Jun 15, 2017

Filed:

Dec 9, 2016

Appl. No.:

15/373580

Inventors:

- Decatur GA, US
Michael Z. Gielniewski - Bartlett IL, US
Feng Chen - Hoffman Estates IL, US
Alejandro Lopez - Lake Zurich IL, US

International Classification:

H05B 33/08

Abstract:

Techniques are described to allow a low-cost light fixture to produce light with a relatively high color rendering index (CRI) across a range of color temperatures. A rectified AC voltage may be provided to multiple groups of light-emitting diodes (LEDs) having characteristics related to a range of color temperatures and a target CRI level. The multiple groups of LEDs may be controlled based on a received control signal, such that the combined groups of LEDs produce combined light having a produced color temperature within the range of color temperatures, and having a produced CRI level that is approximately the target CRI level. In some implementations, the received control signal is modified by a modification circuit, and the multiple groups of LEDs may be controlled based on the modified control signal.

US Patent:

20140292210, Oct 2, 2014

Filed:

Oct 16, 2012

Appl. No.:

14/353933

Inventors:

- EINDHOVEN, NL
Yuhong Fang - Naperville IL, US
Alejandro Lopez - Lake Zurich IL, US

Assignee:

KONINKLIJKE PHILIPS N.V. - EINDHOVEN

International Classification:

H05B 37/02

US Classification:

315159

Abstract:

A shut down circuit is disclosed that allows an electronic device such as a lamp driver to be turned-off with a small signal current. The shut down circuit requires only few components and allows a low-power consumption standby state since some or all of functionality of the electronic device can be turned off. In the one embodiment related to a lamp driver, wires of a 0-10V interface or Dali or other existing interface wires can be used so that no additional wires are needed. In addition, the shutdown circuit is galvanically isolated which allows connection to almost any external supply (low or high voltage, AC or DC).