David H Power

US Patent:

20210159220, May 27, 2021

Filed:

Feb 4, 2021

Appl. No.:

17/167585

Inventors:

- Durham NC, US
Al Safarikas - Cary NC, US
David Power - Morrisville NC, US

International Classification:

H01L 25/075
F21K 9/232
H01L 33/50

Abstract:

A lighting apparatus a first group of at least one first solid state emitter, each first solid state emitter including a first light emitting diode (“LED”) that, when excited, emits light having a peak wavelength in a range between about 440 nm and about 475 nm, and a second group of at least one second solid state emitter, each second solid state emitter comprising a second LED that, when excited, emits light having a peak wavelength in a range between about 390 nm and about 415 nm. Between about 2% and about 15% of a spectral power of light emitted from the lighting apparatus is light having wavelengths in the range between about 390 nm and about 415 nm.

US Patent:

20200126956, Apr 23, 2020

Filed:

Dec 17, 2019

Appl. No.:

16/717389

Inventors:

- Durham NC, US
Al Safarikas - Cary NC, US
David Power - Morrisville NC, US

International Classification:

H01L 25/075
H01L 33/50
F21K 9/232

Abstract:

A lighting apparatus a first group of at least one first solid state emitter, each first solid state emitter including a first light emitting diode (“LED”) that, when excited, emits light having a peak wavelength in a range between about 440 nm and about 475 nm, and a second group of at least one second solid state emitter, each second solid state emitter comprising a second LED that, when excited, emits light having a peak wavelength in a range between about 390 nm and about 415 nm. Between about 2% and about 15% of a spectral power of light emitted from the lighting apparatus is light having wavelengths in the range between about 390 nm and about 415 nm.

US Patent:

20180295705, Oct 11, 2018

Filed:

Apr 10, 2017

Appl. No.:

15/483453

Inventors:

- Durham NC, US
Daniel James Van Epps, JR. - Apex NC, US
Yuan Fang - Durham NC, US
David Power - Morrisville NC, US
Leigh Herman - Rolesville NC, US
Thomas Gordon - Cary NC, US

International Classification:

H05B 37/02
H05B 33/08
G06F 3/041
G06F 3/0488
G06F 3/01

Abstract:

A lighting controller comprises power circuitry, transmitter circuitry, a touch-sensitive panel, and processing circuitry. The power circuitry is configured to relay power from the lighting controller to a solid state lighting fixture wired to the lighting controller. The transmitter circuitry is configured to wirelessly exchange signals with the solid state lighting fixture. The touch-sensitive panel is configured to emit light and receive touch input from a user. The processing circuitry is electrically coupled to the power circuitry, the transmitter circuitry, and the touch-sensitive panel. The processing circuitry is configured to wirelessly control, via the transmitter circuitry, the attribute of light emitted by the solid state lighting fixture in accordance with the touch input received via the touch-sensitive panel and control the light emitted from the touch-sensitive panel to indicate the attribute as the attribute is wirelessly controlled.

US Patent:

20180092189, Mar 29, 2018

Filed:

Sep 25, 2017

Appl. No.:

15/714290

Inventors:

- Durham NC, US
David Power - Morrisville NC, US
Yuan Fang - Durham NC, US
Al Safarikas - Cary NC, US

International Classification:

H05B 37/02
G10L 15/26
G10L 15/22
G10L 15/30

Abstract:

A lighting wall controller can be a retrofit for existing light switches, and the lighting wall control replaces the conventional light switch and can still work as a conventional light switch or other power switch with “dumb” lights or appliances while providing the ability to control “smart” lights and/or other “smart” devices with voice commands. In addition to controlling lights and/or devices, voice commands can be used to provide information or actions back to the user in response to the voice command. The lighting wall controller thereby provides voice control functionality without requiring additional devices, such as additional voice control appliances.

US Patent:

20170374718, Dec 28, 2017

Filed:

Jun 21, 2017

Appl. No.:

15/628975

Inventors:

- Durham NC, US
David Power - Durham NC, US

International Classification:

H05B 33/08

Abstract:

A PWM dimmer includes a source terminal, a load terminal, a power stage, an interface, and control circuitry. The power stage is coupled between the source terminal and the load terminal and is configured to receive from the source terminal an AC supply signal and provide a pulsed AC load signal to the load terminal in response to a control signal. The AC supply signal has a sinusoidal envelope with a positive half-cycle and a negative half-cycle for each cycle. The pulsed AC load signal tracks the envelope and includes a plurality of pulses in the positive half-cycle and the negative half-cycle for each cycle. The interface is configured to receive dimming control information bearing on a dimming level from a user or remote terminal. The control circuitry is configured to receive the dimming control information from the interface and generate the control signal based on the dimming control information.

US Patent:

20160348884, Dec 1, 2016

Filed:

May 29, 2015

Appl. No.:

14/725936

Inventors:

- Durham NC, US
Curt Progl - Raleigh NC, US
Daniel J. Van Epps, JR. - Apex NC, US
John Adam Edmond - durham NC, US
Kurt Wilcox - Libertyville IL, US
David Power - Morrisville NC, US

International Classification:

F21V 29/70
F21K 99/00

Abstract:

A LED fixture is provided, the lamp comprising a LED board having a thermally conductive periphery, the LED board comprising at least one LED operable to emit light when energized through an electrical path from a base; and a heat sink assembly thermally coupled to the thermally conductive periphery.

US Patent:

20160273716, Sep 22, 2016

Filed:

May 27, 2016

Appl. No.:

15/166352

Inventors:

- Durham NC, US
Michael John Bergmann - Raleigh NC, US
David Power - Morrisville NC, US
Jeremy Johnson - Fuquay Varina NC, US
Jean Claude deSugny - Potomac MD, US

International Classification:

F21K 99/00
F21V 3/04
F21V 23/00
H05B 37/02
F21V 8/00
F21V 19/00
F21V 23/02
F21V 5/00
F21V 29/74

Abstract:

A LED lamp has at least two LEDs to provide light of at least two different spectral outputs. An optic element has an entry surface disposed to receive the light from the LEDs. The entry surface includes refracting surfaces that refract the light tangentially. The refracting surfaces may extend radially relative to a center of the entry surface. The refracting surfaces may be continuously curved in cross-section where the refracting surfaces may include convex refracting surfaces and concave refracting surfaces.

US Patent:

20160178158, Jun 23, 2016

Filed:

Dec 17, 2014

Appl. No.:

14/573064

Inventors:

- Durham NC, US
David James Power - Morrisville NC, US

International Classification:

F21V 3/04
B29D 11/00
B29C 45/14
F21K 99/00

Abstract:

An optically transmissive enclosure for a lamp comprises a molded plastic first layer and a light diffusive second layer bonded to the molded plastic first layer over an exit surface of the enclosure comprising a light diffusive in-mold film. The lamp includes a base and a light source operable to emit light when energized through an electrical path from the base. The first layer is substantially clear. A method for making the enclosure is provided.