Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within white, red, and yellow/green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Application
Filed:
February 17, 2020
Publication date:
August 13, 2020
Applicant:
Ecosense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard
Abstract: A method of improving high-current density efficiency of an LED, said method comprising: (a) preparing a series of LEDs having decreasing defect densities, wherein each LED of said series has a peak IQE of at least 50%, and wherein each LED of said series has the same epitaxial structure; (b) determining an increase in IQEs at high-current density between at least two LEDs of said series; (c) preparing at least an additional LED of said series by reducing defect density relative to the previously obtained lowest defect density; and (d) reiterating steps (b) and (c) until said increase is at least 3% between two LEDs of said series having a decrease X in defect densities.
Type:
Grant
Filed:
June 19, 2019
Date of Patent:
August 4, 2020
Assignee:
ECOSENSE LIGHTING, INC.
Inventors:
Aurelien J. F. David, Christophe Hurni, Nathan Young
Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within red, blue, and green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. The systems can include an additional LED string configured for functional applications that includes a type of LED selected from 380-420 nm violet saturated LEDs, 200-280 nm UVC saturated LEDs, 850-940 nm near-IR saturated LEDs, 580-620 nm amber-orange/red saturated LEDs, and 460-490 nm long-blue saturated LEDs.
Type:
Grant
Filed:
November 25, 2019
Date of Patent:
July 21, 2020
Assignee:
EcoSense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard, Ihor Lys, Benjamin Harrison
Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and yellow/green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Grant
Filed:
December 13, 2019
Date of Patent:
July 14, 2020
Assignee:
Ecosense Lighting Inc.
Inventors:
Raghuram L. V. Petluri, Paul Kenneth Pickard
Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Application
Filed:
March 18, 2020
Publication date:
July 9, 2020
Applicant:
EcoSense Lighting, Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard
Abstract: An LED pump light with multiple phosphors is described. LEDs emitting radiation at violet and/or ultraviolet wavelengths are used to pump phosphor materials that emit other colors. The LEDs operating in different wavelength ranges are arranged to reduce light re-absorption and improve light output efficiency.
Type:
Grant
Filed:
April 17, 2017
Date of Patent:
June 30, 2020
Assignee:
ECOSENSE LIGHTING, INC.
Inventors:
Aurelien J. F. David, Arpan Chakraborty, Michael Ragan Krames, Troy Trottier
Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light.
Type:
Grant
Filed:
July 30, 2018
Date of Patent:
June 30, 2020
Assignee:
EcoSense Lighting, Inc.
Inventors:
Raghuram L. V Petluri, Paul Kenneth Pickard
Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Grant
Filed:
July 30, 2018
Date of Patent:
June 30, 2020
Assignee:
EcoSense Lighting, Inc.
Inventors:
Raghuram L. V. Petluri, Paul Kenneth Pickard
Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light. One or more of the LED strings can have ultraviolet or violet LEDs.
Type:
Grant
Filed:
July 30, 2018
Date of Patent:
June 30, 2020
Assignee:
EcoSense Lighting, Inc.
Inventors:
Raghuram L. V. Petluri, Paul Kenneth Pickard
Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote phosphor light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of phosphors provide a predetermined range of illumination wavelengths in the output.
Type:
Application
Filed:
March 2, 2020
Publication date:
June 25, 2020
Applicant:
ECOSENSE LIGHTING INC.
Inventors:
Raghuram L. V. PETLURI, Paul Kenneth PICKARD, Robert FLETCHER
Abstract: A voltage control system for an LED operates to dynamically determine and set a minimum permissible voltage on an energy storage device such as a capacitor such that the energy storage device operates at a minimum possible voltage to compensate for component variations and dimming signal variations while maintaining flicker-free operation of the LED.
Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within white, red, and yellow/green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Application
Filed:
February 17, 2020
Publication date:
June 11, 2020
Applicant:
Ecosense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard
Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of luminescence materials provide a predetermined range of illumination wavelengths in the output. The remote light converting appliances may be provided as frustoconical elements directly adjacent to the LEDs within frustoconical reflective cavities. An index matching compound can be disposed between the light converting appliances and the associated LEDs.
Type:
Application
Filed:
February 17, 2020
Publication date:
June 11, 2020
Applicant:
Ecosense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard, Robert Fletcher
Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Grant
Filed:
July 30, 2018
Date of Patent:
June 9, 2020
Assignee:
ECOSENSE LIGHTING INC.
Inventors:
Raghuram L. V. Petluri, Paul Kenneth Pickard
Abstract: A zoned optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a domed light converting appliance (DLCA) covering a cluster of LEDs providing a channel of light which is reflected upward by the cavities and mixed by angles walls and structures above the open top of the cavities in the common body of the cup.
Type:
Application
Filed:
February 3, 2020
Publication date:
June 4, 2020
Applicant:
Ecosense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard
Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Application
Filed:
January 17, 2020
Publication date:
May 21, 2020
Applicant:
Ecosense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard
Abstract: Lens device that includes converging lens having light output surface being spaced apart along lens axis from light input surface. Converging lens has total internal reflection side surface being spaced apart around lens axis and having frusto-conical shape extending between light input and output surfaces of the converging lens. Portion of light input surface of converging lens includes light input cavity being bounded by perimeter and having central axis and being generally shaped as portion of spheroid. Light input cavity has plurality of grooves each respectively following spline along light input surface that intersects with central axis of light input cavity and with respective point on perimeter, wherein each of respective points are mutually spaced apart around perimeter of light input cavity. Lighting system including lens device.
Type:
Grant
Filed:
February 26, 2019
Date of Patent:
May 12, 2020
Assignee:
ECOSENSE LIGHTING INC.
Inventors:
Elizabeth Rodgers, Paul Pickard, Raghuram L. V. Petluri, Robert Fletcher
Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and yellow/green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
Type:
Application
Filed:
December 13, 2019
Publication date:
April 16, 2020
Applicant:
Ecosense Lighting Inc.
Inventors:
Raghuram L.V. Petluri, Paul Kenneth Pickard
Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within red, blue, and green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. The systems can include an additional LED string configured for functional applications that includes a type of LED selected from 380-420 nm violet saturated LEDs, 200-280 nm UVC saturated LEDs, 850-940 nm near-IR saturated LEDs, 580-620 nm amber-orange/red saturated LEDs, and 460-490 nm long-blue saturated LEDs.
Type:
Application
Filed:
November 25, 2019
Publication date:
March 26, 2020
Applicant:
EcoSense Lighting Inc.
Inventors:
Raghuram L.V Petluri, Paul Kenneth Pickard, Ihor Lys, Benjamin Harrison