Patents by Inventor Zhi-Wei Koh
Zhi-Wei Koh 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: 10134963Abstract: A package structure of an ultraviolet light emitting diode is provided, which includes a substrate, a transparent body, at least one ultraviolet light emitting diode, a connecting element and an ultraviolet shielding layer. The transparent body is disposed on the substrate. The transparent body has a space inside thereof. The at least one ultraviolet light emitting diode is disposed on the substrate and inside the space. The connecting element is disposed between the substrate and the transparent body. The ultraviolet shielding layer is disposed between the transparent body and the connecting element.Type: GrantFiled: October 11, 2016Date of Patent: November 20, 2018Assignee: Industrial Techology Research InstituteInventors: Chien-Chun Lu, Chen-Peng Hsu, Zhi-Wei Koh, Yen-Hsiang Fang
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Publication number: 20170162767Abstract: A package structure of an ultraviolet light emitting diode is provided, which includes a substrate, a transparent body, at least one ultraviolet light emitting diode, a connecting element and an ultraviolet shielding layer. The transparent body is disposed on the substrate. The transparent body has a space inside thereof. The at least one ultraviolet light emitting diode is disposed on the substrate and inside the space. The connecting element is disposed between the substrate and the transparent body. The ultraviolet shielding layer is disposed between the transparent body and the connecting element.Type: ApplicationFiled: October 11, 2016Publication date: June 8, 2017Applicant: Industrial Technology Research InstituteInventors: Chien-Chun Lu, Chen-Peng Hsu, Zhi-Wei Koh, Yen-Hsiang Fang
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Patent number: 9566358Abstract: In an embodiment, a sterilization apparatus, adapted to sterilize a liquid to be sterilized, comprises a first sterilization light source, a first container and a sterilization container. The first sterilization light source includes a carrier, a plurality of LED packages and a plurality of collimating units, wherein the plurality of LED packages are disposed on and electrically connected to the plurality of carriers, and each of the plurality of collimating units separately is disposed on a corresponding LED package. The first container accommodates the first sterilization light source, and defines a first light-mixing space. The sterilization container includes an accommodating space for accommodating the liquid, wherein the first container is assembled together with the sterilization container, and the first light-mixing space is disposed between the first sterilization light source and the accommodating space.Type: GrantFiled: December 3, 2015Date of Patent: February 14, 2017Assignee: Industrial Technology Research InstituteInventors: Zhi-Wei Koh, Chien-Chun Lu, Chun-Hsing Lee, Chen-Peng Hsu
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Patent number: 9548424Abstract: A light emitting diode includes a semiconductor stacked structure, a substrate, a first electrode, a second electrode and a third electrode. The semiconductor stacked structure includes a first semiconductor layer, a second semiconductor layer and a light emitting layer. A light extraction layer with a roughened structure is formed on the doped semiconductor layer to improve the light emitting efficiency of LED. Furthermore, the strength of the semiconductor stacked structure can be enhanced by the light extraction layer, to improve the reliability of the LED and the production yields of manufacturing process.Type: GrantFiled: December 30, 2014Date of Patent: January 17, 2017Assignees: Industrial Technology Research Institute, Tyntek CorporationInventors: Chia-Fen Hsieh, Yao-Jun Tsai, Zhi-Wei Koh, Shih-Yi Wen, Chen-Peng Hsu, Chia-Chun Yu, Yen-Chu Li, Chun-Yi Tung
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Patent number: 9075172Abstract: A lighting device including a light converting structure, a light accommodating structure, and a lighting device that utilizes a light converting structure and/or a light accommodating structure to obtain a thinner configuration. The light converting structure includes a bottom conical recess to accommodate a light source, and a top conical recess to distribute the lights emitted from the light source. The light accommodating structure includes a through hole with a small opening and a large opening. A light source is accommodated in the through hole at the large opening, and the lights emitted from the light source output at the small opening.Type: GrantFiled: September 20, 2010Date of Patent: July 7, 2015Assignee: Luxingtek, LTD.Inventors: Zhi-Wei Koh, Chi-Jen Kao, Wen-Chiun Ing, Wei-Hsin Hou
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Publication number: 20150108527Abstract: A light emitting diode includes a semiconductor stacked structure, a substrate, a first electrode, a second electrode and a third electrode. The semiconductor stacked structure includes a first semiconductor layer, a second semiconductor layer and a light emitting layer. A light extraction layer with a roughened structure is formed on the doped semiconductor layer to improve the light emitting efficiency of LED. Furthermore, the strength of the semiconductor stacked structure can be enhanced by the light extraction layer, to improve the reliability of the LED and the production yields of manufacturing process.Type: ApplicationFiled: December 30, 2014Publication date: April 23, 2015Inventors: Chia-Fen Hsieh, Yao-Jun Tsai, Zhi-Wei Koh, Shih-Yi Wen, Chen-Peng Hsu, Chia-Chun Yu, Yen-Chu Li, Chun-Yi Tung
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Patent number: 8814391Abstract: A light guiding structure includes a light transmissive body and microstructures; the light transmissive body includes an upper conical groove and a lower accommodating groove, and the upper conical groove has a curved surface with a continually varied slope; the microstructures are disposed on the light transmissive body. A lighting device includes a circuit board, a light source and the aforesaid light guiding structure; the light source and the light guiding structure are disposed on the circuit board, and the light source is accommodated within the lower accommodating groove.Type: GrantFiled: September 16, 2011Date of Patent: August 26, 2014Assignee: Luxingtek, Ltd.Inventors: Zhi-Wei Koh, Chi-Jen Kao, Wen-Chiun Ing, Wei-Hsin Hou
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Patent number: 8721115Abstract: A light panel is disclosed. The light panel comprises a circuit assembly, a plurality of light sources, a light reflective structure, and a diffuser layer. The light reflective structure has a plurality of concaves, which are continuously connected to form a plurality of ridges. Each of the concaves has an opening formed on the bottom surface thereof, and each of the light sources is disposed corresponding to each of the openings of the concaves. The diffuser layer is supported by the ridges of the light reflective structure. In some aspects of the present invention, the diffuser layer may have a sloping inner surface or is coated with patterned diffuser coatings on the top surface. Each light source can be added with a lens.Type: GrantFiled: May 10, 2011Date of Patent: May 13, 2014Assignee: Luxingtek, Ltd.Inventors: Wen-Chiun Ing, Wei-Hsin Hou, Zhi-Wei Koh, Chi-Jen Kao
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Patent number: 8382337Abstract: A lighting device, a light spreading plate for the lighting device and a method for manufacturing the same are provided. The lighting device comprises a light source plate and the light spreading plate. The light source plate comprises a plurality of light sources. The light spreading plate comprises a light travelling layer formed with a plurality of light spreading units. Each of the light spreading units is formed with a main body being defined with a top surface, a bottom surface and a peripheral. The main body has a thickness being tapered towards the peripheral. The main body comprises a top surface having a cone-shaped recess and a bottom surface having a bowl-shaped recess. The cone-shaped recess and the bowl-shaped recess of each of the spreading units are opposite to each other, and one of the cone-shaped recess and bowl-shaped recess is fitted for one of the light sources.Type: GrantFiled: September 10, 2010Date of Patent: February 26, 2013Assignee: Luxingtek, Ltd.Inventors: Wen-Chiun Ing, Wei-Hsin Hou, Zhi-Wei Koh, Chi-Jen Kao
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Publication number: 20120069575Abstract: Embodiments of the present invention include a light converting structure, a light accommodating structure, and a lighting device. The light converting structure includes a bottom conical recess to accommodate a light source, and a top conical recess to distribute the lights emitted from the light source. The light accommodating structure includes a through hole with a small opening and a large opening. A light source is accommodated in the through hole at the large opening, and the lights emitted from the light source output at the small opening. The lighting device utilizing the light converting structure and/or the light accommodating structure obtains a thinner configuration.Type: ApplicationFiled: September 20, 2010Publication date: March 22, 2012Applicant: LUXINGTEK, LTD.Inventors: Zhi-Wei KOH, Chi-Jen KAO, Wen-Chiun ING, Wei-Hsin HOU
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Publication number: 20120069579Abstract: A direct-lit light guiding structure, a direct-lit light guiding panel and a lighting device are disclosed. The light guiding structure includes a light transmissive body and microstructures; the light transmissive body includes an upper conical groove and a lower accommodating groove, and the upper conical groove has a curved surface with a continually varied slope; the microstructures are disposed on the light transmissive body. The lighting device includes a circuit board, a light source and the aforesaid light guiding structure; the light source and the light guiding structure are disposed on the circuit board, and the light source is accommodated within the lower accommodating groove. With these arrangements, the direct-lit light guiding structure can receive the light rays emitted from the light source, and then output the lights uniformly. Further, a plurality of direct-lit light guiding structures can be connected with one another to form the direct-lit light guiding panel.Type: ApplicationFiled: September 16, 2011Publication date: March 22, 2012Applicant: LUXINGTEK, LTD.Inventors: Zhi-Wei Koh, Chi-Jen Kao, Wen-Chiun Ing, Wei-Hsin Hou
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Publication number: 20110292655Abstract: A light panel is disclosed. The light panel comprises a circuit assembly, a plurality of light sources, a light reflective structure, and a diffuser layer. The light reflective structure has a plurality of concaves, which are continuously connected to form a plurality of ridges. Each of the concaves has an opening formed on the bottom surface thereof, and each of the light sources is disposed corresponding to each of the openings of the concaves. The diffuser layer is supported by the ridges of the light reflective structure. In some aspects of the present invention, the diffuser layer may have a sloping inner surface or is coated with patterned diffuser coatings on the top surface. Each light source can be added with a lens.Type: ApplicationFiled: May 10, 2011Publication date: December 1, 2011Applicant: LUXINGTEK, LTD.Inventors: Wen-Chiun ING, Wei-Hsin HOU, Zhi-Wei KOH, Chi-Jen KAO
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Publication number: 20110069496Abstract: A lighting device, a light spreading plate for the lighting device and a method for manufacturing the same are provided. The lighting device comprises a light source plate and the light spreading plate. The light source plate comprises a plurality of light sources. The light spreading plate comprises a light travelling layer formed with a plurality of light spreading units. Each of the light spreading units is formed with a main body being defined with a top surface, a bottom surface and a peripheral. The main body has a thickness being tapered towards the peripheral. The main body comprises a top surface having a cone-shaped recess and a bottom surface having a bowl-shaped recess. The cone-shaped recess and the bowl-shaped recess of each of the spreading units are opposite to each other, and one of the cone-shaped recess and bowl-shaped recess is fitted for one of the light sources.Type: ApplicationFiled: September 10, 2010Publication date: March 24, 2011Applicant: LUXINGTEK, LTD.Inventors: Wen-Chiun ING, Wei-Hsin HOU, Zhi-Wei KOH, Chi-Jen KAO
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Patent number: D801181Type: GrantFiled: June 2, 2016Date of Patent: October 31, 2017Assignee: Industrial Technology Research InstituteInventors: Zhi-Wei Koh, Chien-Chun Lu, Chen-Peng Hsu, Yen-Hsiang Fang
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Patent number: D807524Type: GrantFiled: May 5, 2016Date of Patent: January 9, 2018Assignee: Industrial Technology Research InstituteInventors: Zhi-Wei Koh, Yen-Hsiang Fang, Chen-Peng Hsu, Chien-Chun Lu