Matthew Stephen Aldrich

US Patent:

7560677, Jul 14, 2009

Filed:

Mar 13, 2007

Appl. No.:

11/717122

Inventors:

Steve S. Lyons - Herndon VA, US
Matthew H. Aldrich - Arlington VA, US

Assignee:

Renaissance Lighting, Inc. - Herndon VA

International Classification:

F21V 9/00

US Classification:

250205, 250228, 362227, 362231, 362236, 362240

Abstract:

A solid state lighting system controls overall light output level in a step-wise manner by discretely controlling the ON/OFF state of its light emitters. Solid state emitters that are ON at a given time are set and kept at a level intended to produce a desired output characteristic, e. g. at a level to produce a described color of light. The system utilizes optical processing of the generated light, for example by diffuse reflection in an optical integrating cavity, sufficient to convert the point source output(s) from the emitting elements into a uniform virtual source output. The virtual source output appears uniform regardless of how many emitters are ON or OFF, and only the perceptible intensity of the light output changes with the number of emitters that the system has ON.

US Patent:

7365991, Apr 29, 2008

Filed:

Apr 14, 2006

Appl. No.:

11/403840

Inventors:

Matthew H. Aldrich - Arlington VA, US

Assignee:

Renaissance Lighting - Herndon VA

International Classification:

H05K 7/02
H05K 7/06
H05K 7/08
H05K 7/10

US Classification:

361783, 361782, 361681, 361808, 361810, 362240, 362249, 362252, 362612, 257 88, 257 98, 257 99

Abstract:

Circuit boards for lighting systems have identical LED landing zones printed on the board. Each zone includes at least two sets of LED contact pads. One pad set is configured to mate with contacts of an LED of a first structural type, e. g. from a first product line or manufacturer. The other pad set is configured to mate with contacts of an LED of a second type, e. g. from a different product line or manufacturer. The layout may enable an easy system re-design, e. g. to shift from one type of LED to another. Alternatively, the layout may enable one system to use LEDs of the two different types in a single LED set or array. Exemplary systems disclosed herein include an element for mixing light produced by LEDs mounted to the landing zones, such as an optical integrating cavity.

US Patent:

8294074, Oct 23, 2012

Filed:

May 12, 2009

Appl. No.:

12/464587

Inventors:

Steve S. Lyons - Herndon VA, US
Matthew H. Aldrich - Arlington VA, US

Assignee:

ABL IP Holding LLC - Conyers GA

International Classification:

H05B 37/02

US Classification:

250205, 250228, 362227, 362231

Abstract:

A solid state lighting system controls overall light output level in a step-wise manner by discretely controlling the ON/OFF state of its light emitters. Solid state emitters that are ON at a given time are set and kept at a level intended to produce a desired output characteristic, e. g. at a level to produce a described color of light. The system utilizes optical processing of the generated light, for example by diffuse reflection in an optical integrating cavity, sufficient to convert the point source output(s) from the emitting elements into a uniform virtual source output. The virtual source output appears uniform regardless of how many emitters are ON or OFF, and only the perceptible intensity of the light output changes with the number of emitters that the system has ON.

US Patent:

8363069, Jan 29, 2013

Filed:

Oct 25, 2006

Appl. No.:

11/585779

Inventors:

Matthew H. Aldrich - Arlington VA, US

Assignee:

ABL IP Holding LLC - Conyers GA

International Classification:

G09G 5/10

US Classification:

345690, 345 83, 356236

Abstract:

Disclosed examples of optical systems having a plurality of light sources with each source having a different spectral outputs may be calibrated by measuring a spectral characteristic of the combined light with two measurements, e. g. , one from a colorimeter and one from a sensor included in the system. Accordingly, one can determine a transform function in response to the two measures that models a feedback response of the optical system for each of a plurality of the inputs that would cause the optical system to generate radiant energy within a predetermined range of a spectrum. In order to calibrate the optical system, the transform function is programmed in the optical system to enable the optical system to transform an input to the optical system to a plurality of unique control signals each for controlling a respective light source of the plurality of light sources.

US Patent:

20060237636, Oct 26, 2006

Filed:

Jun 14, 2006

Appl. No.:

11/452280

Inventors:

Steve Lyons - Herndon VA, US
Matthew Aldrich - Arlington VA, US
Jack Rains - Oak Hill VA, US

International Classification:

G01J 1/00

US Classification:

250228000

Abstract:

An exemplary system to provide visible lighting of a selectable spectral characteristic (e.g. a selectable color combination of light) uses an optical integrating cavity or other diffuse mixing element to combine light of different colors from different color LEDs. Amplitude modulation of pulsed operation the light sources, e.g. pulse amplitude modulation added to a baseline forward bias current for each of the LEDs, controls the amount of each light color supplied to the diffuse mixing element and thus the amount included in the combined light output of the system. A color sensor may provide feedback as to a color characteristic of the combined light, for closed-loop control of one or more of the pulse amplitude modulations. Examples are also disclosed that utilize phosphor doping of one or more of the system's reflective elements, to add desired wavelengths of light to the combined output.

US Patent:

20080228508, Sep 18, 2008

Filed:

Mar 13, 2007

Appl. No.:

11/717074

Inventors:

Steve S. Lyons - Herndon VA, US
Michael E. Garbus - Reston VA, US
Matthew H. Aldrich - Arlington VA, US
Alan W. Geishecker - Woodbridge VA, US

International Classification:

G06Q 90/00

US Classification:

705 1, 257798

Abstract:

Techniques are disclosed to monitor the time of operation of a solid state lighting system, e.g. for warranty purposes. Examples are disclosed that measure time of system connection to power and/or time of light output from the solid state emitter(s) of the system. A service under the warranty is provided if operation time does not exceed the warranty eligibility criteria, e.g. maximum limit(s). The service provided under the warranty may be pro-rated based on the time of operation.