David J Randolph

US Patent:

D692171, Oct 22, 2013

Filed:

Dec 8, 2011

Appl. No.:

29/408232

Inventors:

David N. Randolph - Rougemont NC, US

Assignee:

Cree, Inc. - Durham NC

International Classification:

2605

US Classification:

D26 74, D26 67

US Patent:

20200309347, Oct 1, 2020

Filed:

Jun 15, 2020

Appl. No.:

16/901624

Inventors:

- Durham NC, US
Christopher P. Hussell - Cary NC, US
John Wesley Durkee - Raleigh NC, US
Peter Scott Andrews - Durham NC, US
Mark Cash - Raleigh NC, US
David Randolph - Rougemont NC, US

International Classification:

F21V 9/30
F21K 9/62
F21V 13/02
F21K 9/60
F21V 29/506
F21V 23/00
F21V 7/30
F21V 29/76
F21V 29/77
F21V 29/83
F21V 29/89
F21K 9/66
F21K 9/68
F21V 3/00
F21V 7/00

Abstract:

Solid state lighting components are provided with improved color rendering, improved color uniformity, and improved directional lighting, and that are suitable for use in high output lighting applications and can be used in place of CDMH bulb lighting. Exemplary solid state lighting components include a substrate comprising a light emitter surface and or more light emitters disposed on and/or over the light emitter surface. Exemplary components include a light directing optic and/or a diffusing optic for mixing light. The light directing optic may be disposed at least partially around a perimeter of the light emitter surface. The diffusing optic may be disposed between portions of the light directing optic and spaced apart from the light emitter surface.

US Patent:

20180210135, Jul 26, 2018

Filed:

Jan 23, 2017

Appl. No.:

15/413193

Inventors:

- Durham NC, US
David N. RANDOLPH - Wake Forest NC, US

International Classification:

F21V 8/00
F21S 8/04

Abstract:

In one aspect, light fixtures are described herein employing waveguide components for delivery of directional light to wall surfaces and/or surfaces outside the general down lighting distribution of the fixture. A light fixture comprises a light source component in an optic assembly, the light source component comprising a first light source providing a down lighting distribution and a second light source coupled to a waveguide component of the optic assembly providing one or more lateral lighting distributions from the light fixture. The waveguide component comprises at least one waveguide optic comprising a body and a light extraction face, the light extraction face forming one or more sidewall portions of the optic assembly.

US Patent:

20160320004, Nov 3, 2016

Filed:

Apr 29, 2016

Appl. No.:

15/143261

Inventors:

- Durham NC, US
Christopher P. Hussell - Cary NC, US
John Wesley Durkee - Raleigh NC, US
Peter Scott Andrews - Durham NC, US
Mark Cash - Raleigh NC, US
David Randolph - Rougemont NC, US

International Classification:

F21K 9/66
F21V 29/83
F21V 29/89
F21V 29/77
F21V 3/00
F21V 9/16
F21V 23/00
F21K 9/68
F21V 7/00
F21V 29/76

Abstract:

Solid state lighting components are provided with improved color rendering, improved color uniformity, and improved directional lighting, and that are suitable for use in high output lighting applications and can be used in place of CDMH bulb lighting. Exemplary solid state lighting components include a substrate comprising a light emitter surface and or more light emitters disposed on and/or over the light emitter surface. Exemplary components include a light directing optic and/or a diffusing optic for mixing light. The light directing optic may be disposed at least partially around a perimeter of the light emitter surface. The diffusing optic may be disposed between portions of the light directing optic and spaced apart from the light emitter surface.

US Patent:

20160150614, May 26, 2016

Filed:

Nov 25, 2014

Appl. No.:

14/553082

Inventors:

- Durham NC, US
David N. Randolph - Wake Forest NC, US

International Classification:

H05B 33/08
F21S 8/04
F21S 8/08

Abstract:

A system includes at least one light-emitting device configured to be mounted on a stationary structure, such as a lighting pole or parking structure. A control circuit is operatively coupled to the at least one light-emitting device and configured to detect an object in a vicinity of the at least one light-emitting device and to vary a characteristic of illumination produced by the at least one light-emitting device responsive to the detection of the object.

US Patent:

20160037597, Feb 4, 2016

Filed:

Aug 1, 2014

Appl. No.:

14/449531

Inventors:

- Durham NC, US
David Randolph - Wake Forest NC, US

International Classification:

H05B 33/08
F21V 19/00
H05B 37/02
F21V 7/00
F21V 23/00
F21V 23/04
F21V 5/04

Abstract:

A luminaire includes a light source and an electrical path for providing power to the light source. A switch is in the electrical path and is operable to interrupt and complete the electrical path. An infrared sensor detects an object in proximity to the light source for controlling operation of the switch.

US Patent:

20140268732, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/837200

Inventors:

- Durham NC, US
David N. Randolph - Rougemont NC, US

Assignee:

CREE, INC. - Durham NC

International Classification:

F21K 99/00

US Classification:

362231, 362317, 362235, 362335, 362328

Abstract:

A lighting component having an optic is provided. The optic includes a body formed from a plurality of partial elliptical bodies. Each partial elliptical body is substantially elliptical about a source focal point and a common focal point. Each source focal point for the partial elliptical bodies is disparately located and each common focal point for the plurality of partial elliptical bodies is collocated. The body of the optic has a common outlet proximate the common focal point and a plurality of source inlets where each source inlet of the plurality of source inlets is proximate the source focal point for a corresponding one of the plurality of partial elliptical tubes.

US Patent:

20140268791, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/836729

Inventors:

- Durham NC, US
David N. Randolph - Rougemont NC, US

Assignee:

CREE, INC. - Durham NC

International Classification:

F21V 17/00

US Classification:

362277

Abstract:

Lighting fixtures for solid-state light sources are disclosed. In one embodiment, a lighting fixture has a housing and one or more solid-state lighting sources mounted within the housing. The housing has a body, a lens assembly, and a removable lens adapter. To provide ambient lighting, the one or more solid-state lighting sources are mounted within the housing to emit light through the lens assembly. With regard to the lens assembly, the removable lens adapter is removably attached to the body of the housing so as to mount the lens assembly on the body. Since the removable lens adapter can be removed, different lens assemblies and different removable lens adapters can be selected to be used with the lighting fixture. Thus, the removable lens adapter and lens assembly can be selected from among a variety of different design choices so that the lighting fixture is tailored to a particular application.