Patents by Inventor Douglas A. Collins
Douglas A. Collins 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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Publication number: 20200308025Abstract: A UVC disinfection system is described where incoming fluid, such as water, is directed onto a transparent window in a vertical disinfection chamber. The incoming water is directed downward by a channel at an acute angle (e.g., 10-20 degrees) with respect to a central axis of the disinfection chamber and impinges on the window at an angle almost perpendicular to the window surface. One or more UVC LEDs are optically coupled to the window. The water impinging on the window becomes agitated due to the severe redirection and interaction with water already in the chamber. This randomizes (mixes) the water in the area where there is the highest UVC power. The UVC LEDs direct light along the central axis of the cylindrical chamber for maximum exposure of the water to the UVC light. Disinfection efficiency is therefore increased.Type: ApplicationFiled: March 25, 2019Publication date: October 1, 2020Inventors: Douglas A. Collins, Li Zhang, Wei Keat Chai, Faisal Sudradjat, Yitao Liao
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Patent number: 10490597Abstract: Embodiments of the invention include a first semiconductor layer grown over a growth substrate and a plurality of pixels grown on the first semiconductor layer, each pixel including an active layer disposed between an n-type region and a p-type region. Trenches isolate individual pixels and form at least one sidewall for each pixel. A first metal layer in direct contact with the p-type region is disposed on a top surface of each pixel. A second metal layer in direct contact with the n-type region is disposed on a bottom surface of a trench adjacent to each pixel. An insulating layer electrically isolating the first and second metal layers is disposed on the sidewall of each pixel and is substantially conformal to the sidewall.Type: GrantFiled: September 9, 2016Date of Patent: November 26, 2019Assignee: RayVio CorporationInventors: Douglas A. Collins, Li Zhang, Faisal Sudradjat
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Patent number: 10461229Abstract: Embodiments of the invention include a light emitting diode including a semiconductor structure including an active layer disposed between an n-type region and a p-type region. The active layer emits UV radiation. A first metal layer is in direct contact with the p-type region. A second metal layer is in direct contact with the n-type region. The first and second metal layers are both formed on a first side of the semiconductor structure. A transparent optic is optically coupled to a major surface of the light emitting diode.Type: GrantFiled: March 16, 2018Date of Patent: October 29, 2019Assignee: RayVio CorporationInventors: Robert S. West, Yitao Liao, Douglas A. Collins
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Patent number: 10454005Abstract: Embodiments of the invention include a light emitting diode (UVLED), the UVLED including a semiconductor structure with an active layer disposed between an n-type region and a p-type region. The active layer emits UV radiation. The UVLED is disposed on a mount. A transparent encapsulant is disposed over the UVLED. The transparent encapsulant has an angled sidewall.Type: GrantFiled: August 22, 2018Date of Patent: October 22, 2019Assignee: RayVio CorporationInventors: Faisal Sudradjat, Saijin Liu, Douglas A. Collins
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Patent number: 10403792Abstract: Embodiments of the invention include a light emitting diode (LED) including a semiconductor structure. The semiconductor structure includes an active layer disposed between an n-type region and a p-type region. The active layer emits UV radiation. The LED is disposed on the mount. The mount is disposed on a conductive slug. A support surrounds the conductive slug. The support includes electrically conductive contact pads disposed on a bottom surface, and a thermally conductive pad disposed beneath the conductive slug, wherein the thermally conductive pad is not electrically connected to the LED.Type: GrantFiled: March 7, 2016Date of Patent: September 3, 2019Assignee: RayVio CorporationInventors: Saijin Liu, Li Zhang, Douglas A. Collins
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Publication number: 20190262493Abstract: Embodiments of the invention include a vessel having an opening and a detachable cover for covering the opening. The cover includes a semiconductor device with an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The cover also includes a sensor for detecting whether the cover is covering the opening.Type: ApplicationFiled: February 28, 2019Publication date: August 29, 2019Inventors: Douglas A. Collins, Li Zhang, Saijin Liu, Yitao Liao
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Patent number: 10376608Abstract: Embodiments of the invention include an elongate chamber. A UV source includes a semiconductor device, the semiconductor device including an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The semiconductor device is positioned on a wall of the elongate chamber. An inner surface of the elongate chamber is reflective.Type: GrantFiled: December 1, 2016Date of Patent: August 13, 2019Assignee: RayVio CorporationInventors: Douglas A. Collins, Yitao Liao, Robert S. West
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Patent number: 10377643Abstract: Embodiments of the invention include an elongate chamber. A UV source includes a semiconductor device, the semiconductor device including an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The semiconductor device is positioned on a wall of the elongate chamber. An inner surface of the elongate chamber is reflective.Type: GrantFiled: April 11, 2017Date of Patent: August 13, 2019Assignee: RayVio CorporationInventors: Douglas A. Collins, Yitao Liao, Robert S. West
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Patent number: 10381523Abstract: Embodiments of the invention include a light emitting diode (LED) including a semiconductor structure. The semiconductor structure includes an active layer disposed between an n-type region and a p-type region. The active layer emits UV radiation. The LED is disposed on the mount. The mount is disposed on a conductive slug. A support surrounds the conductive slug. The support includes electrically conductive contact pads disposed on a bottom surface, and a thermally conductive pad disposed beneath the conductive slug, wherein the thermally conductive pad is not electrically connected to the LED.Type: GrantFiled: December 30, 2015Date of Patent: August 13, 2019Assignee: RayVio CorporationInventors: Saijin Liu, Douglas A. Collins
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Patent number: 10363327Abstract: A variety of applications for UV LEDs that are integrated into a system are described, where the UV light is used for disinfection of air or surfaces, or used to detect the scattering light by particles, or used for skin treatment. In one embodiment, a ceiling luminaire includes a sensor for detecting the presence of people in the room. The luminaire contains a first set of LEDs for generating white light, for illumination, and a second set of LEDs for generating UV light for disinfecting the room. When the sensor detects that no people are in the room, the system automatically controls the UV LEDs to turn on to disinfect the room. The white light LEDs may be independently controlled with a dimmer.Type: GrantFiled: November 26, 2018Date of Patent: July 30, 2019Assignee: RayVio CorporationInventors: Yitao Liao, Douglas A. Collins, Theodore J. de Jony, Robert C. Walker, Elaine Taylor
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Patent number: 10326054Abstract: In an example, the present invention provides a light-emitting device configured to emit electromagnetic radiation in a range of 210 to 360 nanometers. The device has a substrate member comprising a surface region. The device has a thickness of AlGaN material formed overlying the surface region and an aluminum concentration characterizing the AlGaN material having a range of 0 to 100%. The device has a boron doping concentration characterizing the AlGaN material having a range between 1e15 to 1e20 atoms/centimeter3.Type: GrantFiled: January 22, 2018Date of Patent: June 18, 2019Assignee: RayVio CorporationInventors: Yitao Liao, Douglas A. Collins, Wei Zhang
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Patent number: 10258715Abstract: Embodiments of the invention include a vessel having an opening and a detachable cover for covering the opening. The cover includes a semiconductor device with an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The cover also includes a sensor for detecting whether the cover is covering the opening.Type: GrantFiled: February 26, 2018Date of Patent: April 16, 2019Assignee: RayVio CorporationInventors: Douglas A. Collins, Li Zhang, Saijin Liu, Yitao Liao
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Patent number: 10246348Abstract: Embodiments of the invention include an elongate chamber. A UV source includes a semiconductor device, the semiconductor device including an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The semiconductor device is positioned on a wall of the elongate chamber. An inner surface of the elongate chamber is reflective.Type: GrantFiled: November 21, 2017Date of Patent: April 2, 2019Assignee: RayVio CorporationInventors: Douglas A. Collins, Li Zhang, Yitao Liao
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Publication number: 20190091358Abstract: A variety of applications for UV LEDs that are integrated into a system are described, where the UV light is used for disinfection of air or surfaces, or used to detect the scattering light by particles, or used for skin treatment. In one embodiment, a ceiling luminaire includes a sensor for detecting the presence of people in the room. The luminaire contains a first set of LEDs for generating white light, for illumination, and a second set of LEDs for generating UV light for disinfecting the room. When the sensor detects that no people are in the room, the system automatically controls the UV LEDs to turn on to disinfect the room. The white light LEDs may be independently controlled with a dimmer.Type: ApplicationFiled: November 26, 2018Publication date: March 28, 2019Inventors: Yitao Liao, Douglas A. Collins, Theodore J. de Jony, Robert C. Walker, Elaine Taylor
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Patent number: 10224443Abstract: An LED device capable of emitting electromagnetic radiation ranging from about 200 nm to 365 nm, the device. The device includes a substrate member, the substrate member being selected from sapphire, silicon, quartz, gallium nitride, gallium aluminum nitride, or others. The device has an active region overlying the substrate region, the active region comprising a light emitting spatial region comprising a p-n junction and characterized by a current crowding feature of electrical current provided in the active region. The light emitting spatial region is characterized by about 1 to 10 microns. The device includes an optical structure spatially disposed separate and apart the light emitting spatial region and is configured to facilitate light extraction from the active region.Type: GrantFiled: April 17, 2017Date of Patent: March 5, 2019Assignee: RayVio CorporationInventors: Douglas A. Collins, Faisal Sudradjat, Robert C. Walker, Yitao Liao
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Patent number: 10166309Abstract: A variety of applications for UV LEDs that are integrated into a system are described, where the UV light is used for disinfection of air or surfaces, or used to detect the scattering light by particles, or used for skin treatment. In one embodiment, a ceiling luminaire includes a sensor for detecting the presence of people in the room. The luminaire contains a first set of LEDs for generating white light, for illumination, and a second set of LEDs for generating UV light for disinfecting the room. When the sensor detects that no people are in the room, the system automatically controls the UV LEDs to turn on to disinfect the room. The white light LEDs may be independently controlled with a dimmer.Type: GrantFiled: June 21, 2016Date of Patent: January 1, 2019Assignee: RayVio CorporationInventors: Yitao Liao, Douglas A. Collins, Theodore J. de Jony, Robert C. Walker, Elaine Taylor
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Publication number: 20180346348Abstract: Embodiments of the invention include a disinfection chamber and a ultraviolet (UV) source. The UV source includes a semiconductor device and a sealed compartment. The semiconductor device includes an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The sealed compartment includes a support, on which the semiconductor device is disposed, a cap surrounding the semiconductor device, and a transparent window attached to the cap. The transparent window forms a wall of the disinfection chamber.Type: ApplicationFiled: June 2, 2017Publication date: December 6, 2018Inventors: Douglas A. Collins, Saijin Liu, Li Zhang
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Patent number: 10105460Abstract: Embodiments of the invention include an ultraviolet (UV) source, the UV source including a semiconductor device comprising an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. A reflector cup is disposed around the UV source. A transparent cover is disposed over the reflector cup.Type: GrantFiled: October 16, 2017Date of Patent: October 23, 2018Assignee: RayVio CorporationInventors: Douglas A. Collins, Li Zhang, Yitao Liao
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Patent number: 10062817Abstract: Embodiments of the invention include a light emitting diode (UVLED), the UVLED including a semiconductor structure with an active layer disposed between an n-type region and a p-type region. The active layer emits UV radiation. The UVLED is disposed on a mount. A transparent encapsulant is disposed over the UVLED. The transparent encapsulant has an angled sidewall.Type: GrantFiled: January 10, 2017Date of Patent: August 28, 2018Assignee: RayVio CorporationInventors: Faisal Sudradjat, Saijin Liu, Douglas A. Collins
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Patent number: 10046076Abstract: Embodiments of the invention include an ultraviolet (UV) source, the UV source including a semiconductor device comprising an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. A reflector cup is disposed around the UV source. A transparent cover is disposed over the reflector cup.Type: GrantFiled: October 16, 2017Date of Patent: August 14, 2018Assignee: RayVio CorporationInventors: Douglas A. Collins, Li Zhang, Yitao Liao