Patents by Inventor Mahendra Dassanayake
Mahendra Dassanayake has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8449137Abstract: A light assembly that includes an elongated housing, a reflective parabolic cylindrical surface within the elongated housing having a focal line and an elongated cover coupled to the elongated housing. The light assembly also includes a plurality of light sources spaced apart longitudinally and emitting light toward the parabolic cylindrical surface. The parabolic cylindrical surface reflects light from the light sources out of the housing through the cover.Type: GrantFiled: June 29, 2011Date of Patent: May 28, 2013Assignee: eLumigen LLCInventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Patent number: 8419218Abstract: A light assembly having an axis of symmetry that includes an enclosure comprising at least a base and a cover coupled to the base. The light assembly also includes a plurality of light sources disposed on a circuit board within the enclosure in a first ring having a center point aligned with the axis of symmetry. The light assembly also includes a reflector that has a first focal point within the cover and a plurality of second focal points disposed in a second ring coincident with the first ring.Type: GrantFiled: June 29, 2011Date of Patent: April 16, 2013Assignee: eLumigen LLCInventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Patent number: 8282250Abstract: A light assembly includes a cover, a base and a housing coupled between the housing and the base. A first circuit board is disposed within the housing. The first circuit board has a plurality of light sources thereon. The housing comprises an inner wall defining a first volume therein and an outer wall spaced apart from the inner wall. The housing comprises a plurality of spaced apart fins extending between the inner wall and the outer wall define a plurality of channels having a first end proximate the cover and a second end proximate the base. The channels have a first cross sectional area proximate the first end greater than a second cross-sectional area proximate the second end. An elongated control circuit board assembly is electrically coupled to the light sources of the first circuit.Type: GrantFiled: June 8, 2012Date of Patent: October 9, 2012Assignee: eLumigen LLCInventors: Mahendra Dassanayake, Hiranthini Alles
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Patent number: 8277082Abstract: A light assembly that includes an enclosure, a circuit board having a plurality of light sources disposed within the enclosure, and a plurality of light redirection elements associated with a respective one of the plurality of light sources. Each of the light redirection elements directs light toward a common point within the enclosure.Type: GrantFiled: June 29, 2011Date of Patent: October 2, 2012Assignee: eLumigen LLCInventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20120169235Abstract: A light assembly includes a light source circuit board and a plurality of light-emitting diodes disposed on the light source circuit board. A plurality of light pipes axially extends from and adjacent to each light-emitting diode. Each light pipe has a respective first end adjacent to the plurality of light-emitting diodes and a second end opposite to the light-emitting diodes. The plurality of light pipes communicates light from the light-emitting diodes therethrough and defines a cavity therebetween. A plurality of thermal vanes forms a heat sink for removing heat from the light-emitting diodes. The plurality of thermal vanes extend adjacent to the plurality of light pipes. A driver circuit board is disposed within the cavity.Type: ApplicationFiled: December 22, 2011Publication date: July 5, 2012Applicant: eLumigen LLCInventors: Mahendra Dassanayake, Gennaro Fedele, James A. Karchon, Alles Hiranthini
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Patent number: 8192057Abstract: A light assembly that includes a base, a housing extending from the base having a partial paraboloidal cross-sectional surface, a light-shifting element disposed within the housing, and a plurality of light sources coupled to the housing. The light sources generate light. The light assembly also includes an angular portion reflecting light from the light sources toward the parabolic cross-sectional surface so that the light reflected from the parabolic surface is directed toward the light-shifting element and light reflected from the light-shifting element is directed out of the housing after reflecting from the housing.Type: GrantFiled: June 29, 2011Date of Patent: June 5, 2012Assignee: eLumigen LLCInventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Patent number: 8186852Abstract: A light assembly 1100 includes a cover 18, a housing 16 coupled to the cover 18 and a lamp base 14 coupled to the cover 18. The light assembly 1100 also includes a first circuit board 30 disposed within the housing 16. The first circuit board 30 has a plurality of light sources 32 thereon. A heat sink 210 is thermally coupled to the light sources 32. The heat sink 32 includes a plurality of spaced-apart layers 1140 having outer edges and openings therethrough. Each of the outer edges 1144 are in contact with the housing 16. The light assembly also includes an elongated control circuit board assembly 1110 electrically coupled to the light sources 32 of the first circuit board 30 and the lamp base 14. The control circuit board 1110 extends through the openings 1170. The control circuit board 1110 has a plurality of electrical components 1112 thereon for controlling the light sources 32.Type: GrantFiled: June 17, 2010Date of Patent: May 29, 2012Assignee: eLumigen LLCInventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20110255282Abstract: A light assembly having an axis of symmetry that includes an enclosure comprising at least a base and a cover coupled to the base. The light assembly also includes a plurality of light sources disposed on a circuit board within the enclosure in a first ring having a center point aligned with the axis of symmetry. The light assembly also includes a reflector that has a first focal point within the cover and a plurality of second focal points disposed in a second ring coincident with the first ring.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Inventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20110254441Abstract: A light assembly that includes a cover, a housing coupled to the cover, and a lamp base coupled to the cover. The light assembly also includes a first circuit board disposed within the housing. The first circuit board has a plurality of light sources thereon. A heat sink is thermally coupled to the light sources and is disposed within the housing. The heat sink includes openings therethrough. Each of the outer edges is in contact with the housing. The light assembly also includes an elongated control circuit board assembly electrically coupled to the light sources of the first circuit board and the lamp base. The control circuit board extends through the openings. The control circuit board has a plurality of electrical components thereon for controlling the light sources.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Inventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20110255277Abstract: A light assembly that includes an elongated housing, a reflective parabolic cylindrical surface within the elongated housing having a focal line and an elongated cover coupled to the elongated housing. The light assembly also includes a plurality of light sources spaced apart longitudinally and emitting light toward the parabolic cylindrical surface. The parabolic cylindrical surface reflects light from the light sources out of the housing through the cover.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Inventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20110255283Abstract: A light assembly that includes a base, a housing extending from the base having a partial paraboloidal cross-sectional surface, a light-shifting element disposed within the housing, and a plurality of light sources coupled to the housing. The light sources generate light. The light assembly also includes an angular portion reflecting light from the light sources toward the parabolic cross-sectional surface so that the light reflected from the parabolic surface is directed toward the light-shifting element and light reflected from the light-shifting element is directed out of the housing after reflecting from the housing.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Inventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20110255278Abstract: A light assembly that includes an enclosure, a circuit board having a plurality of light sources disposed within the enclosure, and a plurality of light redirection elements associated with a respective one of the plurality of light sources. Each of the light redirection elements directs light toward a common point within the enclosure.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Inventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Publication number: 20100327745Abstract: A light assembly 1100 includes a cover 18, a housing 16 coupled to the cover 18 and a lamp base 14 coupled to the cover 18. The light assembly 1100 also includes a first circuit board 30 disposed within the housing 16. The first circuit board 30 has a plurality of light sources 32 thereon. A heat sink 210 is thermally coupled to the light sources 32. The heat sink 32 includes a plurality of spaced-apart layers 1140 having outer edges and openings therethrough. Each of the outer edges 1144 are in contact with the housing 16. The light assembly also includes an elongated control circuit board assembly 1110 electrically coupled to the light sources 32 of the first circuit board 30 and the lamp base 14. The control circuit board 1110 extends through the openings 1170. The control circuit board 1110 has a plurality of electrical components 1112 thereon for controlling the light sources 32.Type: ApplicationFiled: June 17, 2010Publication date: December 30, 2010Inventors: Mahendra Dassanayake, Srini De Mel, Jagath Samarabandu
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Patent number: 7628520Abstract: A lighting system and method enables the generation of light in a manner that reduces the generation of electromagnetic interference (EMI) and/or radio frequency interference (RFI). In one embodiment, a light source emits light upon receiving a substantially linear signal that is generated in response to a pulse width modulated (PWM) signal.Type: GrantFiled: April 23, 2007Date of Patent: December 8, 2009Assignee: Ford Global Technologies, LLCInventors: Stuart Salter, Mahendra Dassanayake, Lynda Fulgenzi
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Patent number: 7540638Abstract: An adaptive front headlamp assembly capable of down the road illumination and peripheral and foreground illumination is provided. The headlamp assembly comprises a housing adapted for stationary mounting to the vehicle. A stationary primary lighting module disposed within the housing and configured for down the road illumination. A stationary adaptive front lighting module disposed within the housing, configured for peripheral and foreground illumination, includes a plurality of LED light sources capable of emitting light in response to the vehicle's turning radius.Type: GrantFiled: November 10, 2006Date of Patent: June 2, 2009Assignee: Ford Global Technologies, LLCInventors: Mahendra Dassanayake, Robert Miller, Sleiman Abdelnour, Michael S. Wrobel, Jr., Jeffery Shannon
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Publication number: 20080259627Abstract: A lighting system and method enables the generation of light in a manner that reduces the generation of electromagnetic interference (EMI) and/or radio frequency interference (RFI). In one embodiment, a light source emits light upon receiving a substantially linear signal that is generated in response to a pulse width modulated (PWM) signal.Type: ApplicationFiled: April 23, 2007Publication date: October 23, 2008Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Stuart Salter, Mahendra Dassanayake, Lynda Fulgenzi
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Publication number: 20080230113Abstract: A lighting system is described herein that may be energized by a plurality of sources. In one embodiment, a solar cell is capable of receiving light and converting the light into electrical signals. An energy conversion device may be included that converts movement of the energy conversion device into electrical signals. Additionally, an energy storage device receives and stores the electrical signals from the solar cell and the energy conversion device. The energy storage device is also adapted to supply energy to a lamp that emits light.Type: ApplicationFiled: March 20, 2007Publication date: September 25, 2008Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Mahendra Dassanayake, Donald Bilger, Tyler Blake, Chad Clement
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Publication number: 20080225549Abstract: An illumination system includes a plurality of radiation generating sources, such as LED dies. A corresponding plurality of optical waveguides is also provided, with each waveguide having a first and a second end, with each first end being in optical communication with the corresponding LED die. An array of corresponding passive optical elements is interposed between the plurality of LED dies and the corresponding first ends of the plurality of optical waveguides. The illumination system provides for substantially high light coupling efficiency and an incoherent light output that can appear to the human observer as arising from a single point of light. In addition, the light can be output remotely at one or more locations and in one or more directions.Type: ApplicationFiled: February 26, 2007Publication date: September 18, 2008Inventors: Mahendra Dassanayake, Alfred Wasilewski
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Publication number: 20080112173Abstract: An adaptive front headlamp assembly capable of down the road illumination and peripheral and foreground illumination is provided. The headlamp assembly comprises a housing adapted for stationary mounting to the vehicle. A stationary primary lighting module disposed within the housing and configured for down the road illumination. A stationary adaptive front lighting module disposed within the housing, configured for peripheral and foreground illumination, includes a plurality of LED light sources capable of emitting light in response to the vehicle's turning radius.Type: ApplicationFiled: November 10, 2006Publication date: May 15, 2008Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Mahendra Dassanayake, Robert Miller, Sleiman Abdelnour, Michael S. Wrobel, Jeffery Shannon
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Patent number: 7341365Abstract: An LED unit for a vehicle lamp assembly. The LED unit is comprised of a housing, one or more LEDs, a light pipe, and an optic structure. The housing contains the LEDs and has the light pipe extending therefrom. The light pipe is sized sufficiently narrow for extending through a hole formed in a base portion of the vehicle lamp assembly. The light pipe is attached to an optic structure. The vehicle lamp assembly transmits light in a unilateral direction distal to the housing through the light pipe and the optic structure. The optic structure scatters light in a series of directions distal to the housing.Type: GrantFiled: December 16, 2005Date of Patent: March 11, 2008Assignee: Ford Global Technologies, LLCInventors: Jim Basile, Mahendra Dassanayake, Chad Clement