Patents by Inventor Willem H. Smits
Willem H. Smits 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: 9081167Abstract: One or more LED dice are mounted on a support structure. The support structure may be a submount with the LED dice already electrically connected to leads on the submount. A mold has indentations in it corresponding to the positions of the LED dice on the support structure. The indentations are filled with a liquid optically transparent material, such as silicone, which when cured forms a lens material. The shape of the indentations will be the shape of the lens. The mold and the LED dice/support structure are brought together so that each LED die resides within the liquid silicone in an associated indentation. The mold is then heated to cure (harden) the silicone. The mold and the support structure are then separated, leaving a complete silicone lens over each LED die. This over molding process may be repeated with different molds to create concentric shells of lenses.Type: GrantFiled: March 14, 2008Date of Patent: July 14, 2015Assignees: Koninklijke Philips N.V., Philips Lumileds Lighting Company LLCInventors: Grigoriy Basin, Robert Scott West, Paul S. Martin, Gerard Harbers, Willem H. Smits, Robert F. M. Hendriks, Frans H. Konijn
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Publication number: 20090032827Abstract: Lenses for LEDs are described that efficiently create a substantially uniform light emission across a surface of a backlight box. The backlight may illuminate an LCD. A wide-emitting lens refracts light emitted by an LED die to cause a peak intensity to occur within 35-65 degrees off the die's center axis, normal to the die's top surface, and an intensity along the center axis to be between 40% and 90% of the peak intensity. The lens is concave over the die and has smooth edges that transition into the lens sidewalls. The direct emissions of the lenses from a plurality of LEDs arranged on a base surface in a backlight box combine together to uniformly illuminate a light output surface of the backlight box.Type: ApplicationFiled: July 30, 2007Publication date: February 5, 2009Applicant: PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventor: Willem H. Smits
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Patent number: 7431486Abstract: Various techniques are described herein for combining two or more LEDs in a single reflective cavity for a rear lamp in an automobile. The LEDs may be two or more different colors for performing different functions, such as a stop light, a turn signal, and a tail light. In one embodiment, the LEDs have side emitting lenses and are coaxially aligned in a parabolic reflector. The LEDs may be mounted facing each other or mounted in the same direction, or a combination of both. The LEDs may share a common heat sink. A second reflector may be positioned inside a larger reflector, where a first LED is mounted near the focal point of the larger reflector, and a second LED is mounted near the focal point of the inner reflector. Additional LEDs may also be mounted in either reflector and separately controlled.Type: GrantFiled: August 22, 2006Date of Patent: October 7, 2008Assignee: Philips Lumileds Lighting Company, LLCInventors: Pascal J. H. Bloemen, Willem H. Smits, Nicola B. Pfeffer, Wiep Folkerts
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Publication number: 20080157114Abstract: One or more LED dice are mounted on a support structure. The support structure may be a submount with the LED dice already electrically connected to leads on the submount. A mold has indentations in it corresponding to the positions of the LED dice on the support structure. The indentations are filled with a liquid optically transparent material, such as silicone, which when cured forms a lens material. The shape of the indentations will be the shape of the lens. The mold and the LED dice/support structure are brought together so that each LED die resides within the liquid silicone in an associated indentation. The mold is then heated to cure (harden) the silicone. The mold and the support structure are then separated, leaving a complete silicone lens over each LED die. This over molding process may be repeated with different molds to create concentric shells of lenses.Type: ApplicationFiled: March 14, 2008Publication date: July 3, 2008Applicant: PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventors: Grigoriy Basin, Robert Scott West, Paul S. Martin, Gerard Harbers, Willem H. Smits, Robert F. M. Hendriks, Frans H. Konijn
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Patent number: 7352011Abstract: Lenses and certain fabrication techniques are described. A wide-emitting lens refracts light emitted by an LED die to cause a peak intensity to occur within 50-80 degrees off the center axis and an intensity along the center axis to be between 5% and 33% of the peak intensity. The lens is particularly useful in a LCD backlighting application. In one embodiment, the lens is affixed to the backplane on which the LED die is mounted and surrounds the LED die. The lens has a hollow portion that forms an air gap between the LED die and the lens, where the light is bent towards the sides both at the air gap interface and the outer lens surface interface. The lens may be a secondary lens surrounding an interior lens molded directly over the LED die.Type: GrantFiled: March 29, 2005Date of Patent: April 1, 2008Assignee: Philips Lumileds Lighting Company, LLCInventors: Willem H. Smits, Robert F. M. Hendriks, Grigoriy Basin, Frans H. Konijn, Robert Scott West, Paul S. Martin, Gerard Harbers
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Patent number: 7344902Abstract: One or more LED dice are mounted on a support structure. The support structure may be a submount with the LED dice already electrically connected to leads on the submount. A mold has indentations in it corresponding to the positions of the LED dice on the support structure. The indentations are filled with a liquid optically transparent material, such as silicone, which when cured forms a lens material. The shape of the indentations will be the shape of the lens. The mold and the LED dice/support structure are brought together so that each LED die resides within the liquid silicone in an associated indentation. The mold is then heated to cure (harden) the silicone. The mold and the support structure are then separated, leaving a complete silicone lens over each LED die. This over molding process may be repeated with different molds to create concentric shells of lenses.Type: GrantFiled: February 28, 2005Date of Patent: March 18, 2008Assignee: Philips Lumileds Lighting Company, LLCInventors: Grigoriy Basin, Robert Scott West, Paul S. Martin, Gerard Harbers, Willem H. Smits, Robert F. M. Hendriks, Frans H. Konijn
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Publication number: 20080049438Abstract: Various techniques are described herein for combining two or more LEDs in a single reflective cavity for a rear lamp in an automobile. The LEDs may be two or more different colors for performing different functions, such as a stop light, a turn signal, and a tail light. In one embodiment, the LEDs have side emitting lenses and are coaxially aligned in a parabolic reflector. The LEDs may be mounted facing each other or mounted in the same direction, or a combination of both. The LEDs may share a common heat sink. A second reflector may be positioned inside a larger reflector, where a first LED is mounted near the focal point of the larger reflector, and a second LED is mounted near the focal point of the inner reflector. Additional LEDs may also be mounted in either reflector and separately controlled.Type: ApplicationFiled: August 22, 2006Publication date: February 28, 2008Applicant: PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventors: Pascal J.H. Bloemen, Willem H. Smits, Nicola B. Pfeffer, Wiep Folkerts