Patents by Inventor Shan Mei Wan
Shan Mei Wan 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: 10027857Abstract: A method for detecting electronic lighting flickering includes: taking a video of an electronic light with a duration of a predetermined period and a scanning frequency; extracting a predetermined number of frames of pictures from the video; determining a flickering frequency of the electronic light; determining at least one fixed reference point at each frame; and reconstructing a brightness waveform of the electronic light from the reference point in all frames of the video.Type: GrantFiled: November 2, 2016Date of Patent: July 17, 2018Assignee: Gean Technology Co. LimitedInventors: Shan Mei Wan, Po Shu Bruce Lam, Chi Keung Yeung
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Patent number: 9584704Abstract: A method for detecting electronic lighting flickering includes: taking a video of an electronic light with a duration of a predetermined period and a scanning frequency; extracting a predetermined number of frames of pictures from the video; determining a flickering frequency of the electronic light; determining at least one fixed reference point at each frame; and reconstructing a brightness waveform of the electronic light from the reference point in all frames of the video.Type: GrantFiled: December 30, 2015Date of Patent: February 28, 2017Assignee: Gean Technology Co. LimitedInventors: Shan Mei Wan, Po Shu Bruce Lam, Chi Keung Yeung
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Publication number: 20170048444Abstract: A method for detecting electronic lighting flickering includes: taking a video of an electronic light with a duration of a predetermined period and a scanning frequency; extracting a predetermined number of frames of pictures from the video; determining a flickering frequency of the electronic light; determining at least one fixed reference point at each frame; and reconstructing a brightness waveform of the electronic light from the reference point in all frames of the video.Type: ApplicationFiled: November 2, 2016Publication date: February 16, 2017Inventors: Shan Mei Wan, Po Shu Bruce Lam, Chi Keung Yeung
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Publication number: 20160238199Abstract: A light bulb with LED symbols includes a light bulb shell, at least one LED light source, a driver, and an electrical connector. The LED light source includes electrodes and at least one LED substrate with LED chips mounted thereon. The LED substrate has a shape of a pattern, letter, word, logo, character or sign. The LED light source is housed inside a vacuum sealed chamber. The electrodes are connected to a pair of electrical wires, which are connected to a driver and an electrical connector. A method of manufacturing the light bulb is also disclosed.Type: ApplicationFiled: February 16, 2016Publication date: August 18, 2016Inventors: Chi Keung Yeung, Pan Man Wong, Shan Mei Wan
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Publication number: 20160205290Abstract: A method for detecting electronic lighting flickering includes: taking a video of an electronic light with a duration of a predetermined period and a scanning frequency; extracting a predetermined number of frames of pictures from the video; determining a flickering frequency of the electronic light; determining at least one fixed reference point at each frame; and reconstructing a brightness waveform of the electronic light from the reference point in all frames of the video.Type: ApplicationFiled: December 30, 2015Publication date: July 14, 2016Inventors: Shan Mei Wan, Po Shu Bruce Lam, Chi Keung Yeung
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Patent number: 8629466Abstract: This invention discloses a lighting device for providing an illumination with enhanced color uniformity. The lighting device includes a light generating element adjacent a substrate and configured to produce light having wavelengths substantially within a first wavelength range; a transparent frame attached to the substrate, surrounding the transparent frame; a wavelength converting layer for converting a portion of the light produced by the light generating element into light having wavelengths within a second wavelength range, substantially covering the light emitting surface and at least part of the transparent frame; and a scattering frame configured to substantially scatter light that travels therein, covering a portion of the light emitting surface around periphery thereof to thereby receive a portion of the light leaving the wavelength converting layer around the periphery of the light emitting area. Light components in said portion of the light are substantially mixed in the scattering frame.Type: GrantFiled: May 22, 2012Date of Patent: January 14, 2014Assignee: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Shan Mei Wan, Tuen Yi Ng
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Publication number: 20130313580Abstract: This invention discloses a lighting device for providing an illumination with enhanced color uniformity. The lighting device includes a light generating element adjacent a substrate and configured to produce light having wavelengths substantially within a first wavelength range; a transparent frame attached to the substrate, surrounding the transparent frame; a wavelength converting layer for converting a portion of the light produced by the light generating element into light having wavelengths within a second wavelength range, substantially covering the light emitting surface and at least part of the transparent frame; and a scattering frame configured to substantially scatter light that travels therein, covering a portion of the light emitting surface around periphery thereof to thereby receive a portion of the light leaving the wavelength converting layer around the periphery of the light emitting area. Light components in said portion of the light are substantially mixed in the scattering frame.Type: ApplicationFiled: May 22, 2012Publication date: November 28, 2013Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Shan Mei WAN, Tuen Yi NG
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Patent number: 8373183Abstract: A light emitting diode package for one or more light emitting diodes mounted on a substrate. A frame is disposed on at least a portion of the substrate and substantially surrounds, but does not contact, the light emitting diode. The frame is substantially transparent to light emitted from the light emitting diode and includes one or more first wavelength converting materials. The wavelength converting materials, which may be one or more phosphors, convert at least a portion of light emitted at the emission wavelength to different wavelength. A cover covers the light emitting diode within the frame. The cover layer includes one or more second wavelength converting materials differing from the first one or more wavelength converting materials in wavelength converting material concentration or in converted light wavelength or in combinations of wavelength converting materials.Type: GrantFiled: February 22, 2011Date of Patent: February 12, 2013Assignee: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Shan Mei Wan, Chang Shu Lee, Ming Lu
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Publication number: 20120211778Abstract: A light emitting diode package for one or more light emitting diodes mounted on a substrate. A frame is disposed on at least a portion of the substrate and substantially surrounds, but does not contact, the light emitting diode. The frame is substantially transparent to light emitted from the light emitting diode and includes one or more first wavelength converting materials. The wavelength converting materials, which may be one or more phosphors, convert at least a portion of light emitted at the emission wavelength to different wavelength. A cover covers the light emitting diode within the frame. The cover layer includes one or more second wavelength converting materials differing from the first one or more wavelength converting materials in wavelength converting material concentration or in converted light wavelength or in combinations of wavelength converting materials.Type: ApplicationFiled: February 22, 2011Publication date: August 23, 2012Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Shan Mei WAN, Chang Shu LEE, Ming LU
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Patent number: 8093788Abstract: A light emitting device package and a lighting system are provided. According to one embodiment, a functional substrate; at least one light emitting element bonded onto the functional substrate; and at least one design-in thermal detection unit built onto the functional substrate are provided, wherein the design-in thermal detection unit is proximate to the light emitting element, and wherein the design-in thermal detection unit is configured to detect the temperature and transmit a temperature signal. The design-in thermal detection unit may be an NTC thermistor based on a semiconductor substrate. A control system may be included to detect temperature and make any necessary current adjustments in order to maintain consistent performance of the light emitting element.Type: GrantFiled: March 2, 2009Date of Patent: January 10, 2012Assignee: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Shan Mei Wan, Chi Hang Cheung, Ming Lu
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Patent number: 8081216Abstract: A lighting control system for controlling the lighting of a predetermined area is provided. According to one embodiment, the lighting control system comprises one or more light sources positioned in the predetermined area, the light source configured to include adjustable light intensity; a camera positioned and configured to capture an image of the predetermined area; and a controller in operable communication with the one or more light sources and the camera, the controller configured to control the one or more light sources and adjust the light intensity of the light source. The controller is configured to operate in a closed control loop to automatically adjust the lighting conditions of a predetermined area or environment. A false alarm checking process checks for temporary or localized events to prevent unnecessary lighting adjustments.Type: GrantFiled: March 26, 2009Date of Patent: December 20, 2011Assignee: Hong Kong Science and Technology Research Institute Co., Ltd.Inventors: Chi Hang Cheung, Shan Mei Wan, Kai Chiu Wu, Ming Lu
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Publication number: 20110062454Abstract: A light emitting device with a remotely located light scattering material which improves color mixing property is provided. The light emitting device includes a substrate defining a cavity; one or more light emitting elements bonded to the substrate and positioned in the cavity; at least one first layer covering the one or more light emitting elements, at least part of the at least one first layer within the cavity, wherein the at least one first layer has a refractive index less than the refractive index of the one or more light emitting elements; and at least one second layer including light scattering material disposed on the at least one first layer, wherein the refractive index of the first layer is less than or equal to the refractive index of the second layer.Type: ApplicationFiled: September 11, 2009Publication date: March 17, 2011Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Shan Mei Wan, Ming Lu
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Publication number: 20100244708Abstract: A lighting control system for controlling the lighting of a predetermined area is provided. According to one embodiment, the lighting control system comprises one or more light sources positioned in the predetermined area, the light source configured to include adjustable light intensity; a camera positioned and configured to capture an image of the predetermined area; and a controller in operable communication with the one or more light sources and the camera, the controller configured to control the one or more light sources and adjust the light intensity of the light source. The controller is configured to operate in a closed control loop to automatically adjust the lighting conditions of a predetermined area or environment. A false alarm checking process checks for temporary or localized events to prevent unnecessary lighting adjustments.Type: ApplicationFiled: March 26, 2009Publication date: September 30, 2010Applicant: HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE CO., LTD.Inventors: Chi Hang Cheung, Shan Mei Wan, Kai Chiu Wu, Ming Lu
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Publication number: 20100219733Abstract: A light emitting device package and a lighting system are provided. According to one embodiment, a functional substrate; at least one light emitting element bonded onto the functional substrate; and at least one design-in thermal detection unit built onto the functional substrate are provided, wherein the design-in thermal detection unit is proximate to the light emitting element, and wherein the design-in thermal detection unit is configured to detect the temperature and transmit a temperature signal. The design-in thermal detection unit may be an NTC thermistor based on a semiconductor substrate. A control system may be included to detect temperature and make any necessary current adjustments in order to maintain consistent performance of the light emitting element.Type: ApplicationFiled: March 2, 2009Publication date: September 2, 2010Applicant: HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE CO. LTD.Inventors: Shan Mei Wan, Chi Hang Cheung, Ming Lu