Patents by Inventor Douglas W. Pocius
Douglas W. Pocius 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: 8415694Abstract: A device includes a light emitting structure and a wavelength conversion member comprising a semiconductor. The light emitting structure is bonded to the wavelength conversion member. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with an inorganic bonding material. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with a bonding material having an index of refraction greater than 1.5.Type: GrantFiled: February 23, 2010Date of Patent: April 9, 2013Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Publication number: 20120021543Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent lens having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent lens to a light emitting device having a stack of layers including semiconductor layers comprising an active region includes elevating a temperature of the lens and the stack and applying a pressure to press the lens and the stack together. Bonding a high refractive index lens to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. Advantageously, this improvement can be achieved without the use of an encapsulant.Type: ApplicationFiled: October 4, 2011Publication date: January 26, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.VInventors: Michael D. CAMRAS, MICHAEL R. KRAMES, WAYNE L. SNYDER, FRANK M. STERANKA, ROBERT C. TABER, JOHN J. UEBBING, DOUGLAS W. POCIUS, TROY A. TROTTIER, CHRISTOPHER H. LOWERY, GERD O. MUELLER, REGINA B. MUELLER-MACH
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Patent number: 8049234Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.Type: GrantFiled: October 8, 2007Date of Patent: November 1, 2011Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Publication number: 20100148151Abstract: A device includes a light emitting structure and a wavelength conversion member comprising a semiconductor. The light emitting structure is bonded to the wavelength conversion member. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with an inorganic bonding material. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with a bonding material having an index of refraction greater than 1.5.Type: ApplicationFiled: February 23, 2010Publication date: June 17, 2010Applicant: PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Patent number: 7299991Abstract: Reflective members for use in encoder systems are provided. One embodiment comprises a reflective member comprising a reflective layer, at least another layer, and a reflective pattern comprising a first portion having a first reflective property and a second portion having a different reflective property. The reflective layer forms at least a part of the reflective pattern. In addition, the aforementioned first portion of the reflective member has a width of less than half of the grating period. The reflective member enables measurement of at least one operational attribute of an object.Type: GrantFiled: April 8, 2003Date of Patent: November 27, 2007Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Kong Leong Teng, Kee Yean Ng, Hon-Choong Yip, Douglas W. Pocius
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Patent number: 7279345Abstract: A method of bonding a transparent optical element to a light emitting device having a stack of layers including semiconductor layers comprising an active region is provided. The method includes elevating a temperature of the optical element and the stack and applying a pressure to press the optical element and the stack together. In one embodiment, the method also includes disposing a layer of a transparent bonding material between the stack and the optical element. The bonding method can be applied to a premade optical element or to a block of optical element material which is later formed or shaped into an optical element such as a lens or an optical concentrator.Type: GrantFiled: September 10, 2004Date of Patent: October 9, 2007Assignee: Philips Lumileds Lighting Company, LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Patent number: 7276737Abstract: A device includes a light emitting semiconductor device bonded to an optical element. In some embodiments, the optical element may be elongated or shaped to direct a portion of light emitted by the active region in a direction substantially perpendicular to a central axis of the semiconductor light emitting device and the optical element. In some embodiments, the semiconductor light emitting device and optical element are positioned in a reflector or adjacent to a light guide. The optical element may be bonded to the first semiconductor light emitting device by a bond at an interface disposed between the optical element and the semiconductor light emitting device. In some embodiments, the bond is substantially free of organic-based adhesives.Type: GrantFiled: January 9, 2006Date of Patent: October 2, 2007Assignee: Philips Lumileds Lighting Company, LLCInventors: Michael D. Camras, Gerard Harbers, William R. Imler, Matthijs H. Keuper, Paul S. Martin, Douglas W. Pocius, Frank M. Steranka, Helena Ticha, Ladislav Tichy, R. Scott West
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Patent number: 7064355Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent optical element (e.g., a lens or an optical concentrator) to a light emitting device comprising an active region includes elevating a temperature of the optical element and the stack and applying a pressure to press the optical element and the light emitting device together. A block of optical element material may be bonded to the light emitting device and then shaped into an optical element. Bonding a high refractive index optical element to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection.Type: GrantFiled: June 12, 2001Date of Patent: June 20, 2006Assignee: Lumileds Lighting U.S., LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Patent number: 7053419Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent lens having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent lens to a light emitting device having a stack of layers including semiconductor layers comprising an active region includes elevating a temperature of the lens and the stack and applying a pressure to press the lens and the stack together. Bonding a high refractive index lens to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. Advantageously, this improvement can be achieved without the use of an encapsulant.Type: GrantFiled: September 12, 2000Date of Patent: May 30, 2006Assignee: LumiLeds Lighting U.S., LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach
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Patent number: 7009213Abstract: A device includes a light emitting semiconductor device bonded to an optical element. In some embodiments, the optical element may be elongated or shaped to direct a portion of light emitted by the active region in a direction substantially perpendicular to a central axis of the semiconductor light emitting device and the optical element. In some embodiments, the semiconductor light emitting device and optical element are positioned in a reflector or adjacent to a light guide. The optical element may be bonded to the first semiconductor light emitting device by a bond at an interface disposed between the optical element and the semiconductor light emitting device. In some embodiments, the bond is substantially free of organic-based adhesives.Type: GrantFiled: July 31, 2003Date of Patent: March 7, 2006Assignee: Lumileds Lighting U.S., LLCInventors: Michael D. Camras, Gerard Harbers, William R. Imler, Matthijs H. Keuper, Paul S. Martin, Douglas W. Pocius, Frank M. Steranka, Helena Ticha, Ladislav Tichy, R. Scott West
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Patent number: 6987613Abstract: Provided is a light emitting device including a Fresnel lens and/or a holographic diffuser formed on a surface of a semiconductor light emitter for improved light extraction, and a method for forming such light emitting device. Also provided is a light emitting device including an optical element stamped on a surface for improved light extraction and the stamping method used to form such device. An optical element formed on the surface of a semiconductor light emitter reduces reflective loss and loss due to total internal reflection, thereby improving light extraction efficiency. A Fresnel lens or a holographic diffuser may be formed on a surface by wet chemical etching or dry etching techniques, such as plasma etching, reactive ion etching, and chemically-assisted ion beam etching, optionally in conjunction with a lithographic technique. In addition, a Fresnel lens or a holographic diffuser may be milled, scribed, or ablated into the surface.Type: GrantFiled: March 30, 2001Date of Patent: January 17, 2006Assignee: Lumileds Lighting U.S., LLCInventors: Douglas W. Pocius, Michael D. Camras, Gloria E. Hofler
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Publication number: 20020141006Abstract: Provided is a light emitting device including a Fresnel lens and/or a holographic diffuser formed on a surface of a semiconductor light emitter for improved light extraction, and a method for forming such light emitting device. Also provided is a light emitting device including an optical element stamped on a surface for improved light extraction and the stamping method used to form such device. An optical element formed on the surface of a semiconductor light emitter reduces reflective loss and loss due to total internal reflection, thereby improving light extraction efficiency. A Fresnel lens or a holographic diffuser may be formed on a surface by wet chemical etching or dry etching techniques, such as plasma etching, reactive ion etching, and chemically-assisted ion beam etching, optionally in conjunction with a lithographic technique. In addition, a Fresnel lens or a holographic diffuser may be milled, scribed, or ablated into the surface.Type: ApplicationFiled: March 30, 2001Publication date: October 3, 2002Inventors: Douglas W. Pocius, Michael D. Camras, Gloria E. Hofler
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Publication number: 20020030194Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent optical element (e.g., a lens or an optical concentrator) to a light emitting device comprising an active region includes elevating a temperature of the optical element and the stack and applying a pressure to press the optical element and the light emitting device together. A block of optical element material may be bonded to the light emitting device and then shaped into an optical element. Bonding a high refractive index optical element to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection.Type: ApplicationFiled: June 12, 2001Publication date: March 14, 2002Inventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler