Patents by Inventor PO CHANG LI
PO CHANG LI 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: 9341351Abstract: A luminaire and method of installing same on a mounting pole including a housing having a flange and a plurality of LEDs. The flange includes formed therein a plurality of spaced apart holes disposed along a line, a slot disposed along the line, and a central hole disposed along the line and between the slot and the spaced apart holes. The plurality of LEDs are attached to or disposed in the housing. The method includes hanging the luminaire on an upper mounting bolt extending from a mounting pole, sliding the upper mounting bolt along the slot so that a conduit hole and the central hole are at least partially aligned to each other and one of the plurality of spaced apart holes is aligned to a lower mounting hole, and installing a lower mounting bolt through a lower mounting hole and the one spaced apart hole aligned therewith.Type: GrantFiled: April 15, 2013Date of Patent: May 17, 2016Assignee: LEOTEK ELECTRONICS CORPORATIONInventors: Shih-Chang Wang, Pin-Hao Hsu, Po-Chang Li, Chinmau James Hwang, Hamid Kashani
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Publication number: 20160057820Abstract: A light-emitting device includes an autotransformer, a circuit module and a light-emitting module. The autotransformer includes a first positive conductive wire for receiving a first input voltage within a first predetermined voltage range, a second positive conductive wire for receiving a second input voltage within a second predetermined voltage range, and a common negative conductive wire electrically mated to the first positive conductive wire and the second positive conductive wire. The first predetermined voltage range is larger than the second predetermined voltage range. The circuit module includes a driver electrically connected to the autotransformer, and a predetermined operating voltage value for driving the driver is substantially within the second predetermined voltage range. The light-emitting module is electrically connected to the driver.Type: ApplicationFiled: January 30, 2015Publication date: February 25, 2016Inventors: CHIEN-LUNG WANG, SHIH-CHANG WANG, PO-CHANG LI, LI-PO CHANG
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Patent number: 9086199Abstract: A lighting device installation method includes the following steps. Firstly, a holder including a first stopping structure and a first engaging structure is fixed on an installation surface. Then, a lighting device including a second stopping structure and a third stopping structure is provided. The second stopping structure and the third stopping structure are collaboratively defined as a second engaging structure. Then, the second engaging structure of the lighting device is stopped by the first stopping structure of the holder, so that the lighting device is supported by the lower portion of the holder. Then, electrical connection between the lighting device and a power source is established. Afterwards, the second engaging structure of the lighting device is engaged with the first engaging structure of the holder, so that the lighting device is supported by the upper portion of the holder.Type: GrantFiled: August 29, 2013Date of Patent: July 21, 2015Assignee: Lite-On Technology CorporationInventors: Shih-Chang Wang, Po-Chang Li, Ming-Chun Wu, Pin-Hao Hsu, Ming-Chih Lai
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Patent number: 9062865Abstract: A housing of light emitting device including a first part for accommodating a light emitting diode module and providing a space for heat dissipation is disclosed. The first part includes an outline casing forming an enclosed room and at least one heat conductive structure disposed inside the enclosed room. The heat conductive structure couples to a heat dissipating side and a light emitting side of the outline casing.Type: GrantFiled: December 27, 2012Date of Patent: June 23, 2015Assignee: Lite-On Technology CorporationInventors: Shih-Chang Wang, Po-Chang Li, Ming-Chih Lai, Pin-Hao Hsu
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Patent number: 9052073Abstract: An assembly structure of light-guiding cover is used in a lighting device. The lighting device comprises a light-emitting element. The assembly structure comprises a casing and a light-guiding cover. The casing has a receiving recess and a first engaging groove and a second engaging groove opposite to the first engaging groove, the light-emitting element is disposed within the receiving recess, and the first engaging groove and the second engaging groove are located at opposite two sides of the receiving recess. The light-guiding cover covers the receiving recess and has at least one aperture corresponding to the light-emitting element, wherein the light-guiding cover comprises a first engaging sheet and a second engaging sheet. The first engaging sheet is engaged with the first engaging groove. The second engaging sheet is disposed opposite to the first engaging sheet and engaged with the second engaging groove.Type: GrantFiled: May 3, 2013Date of Patent: June 9, 2015Assignee: Lite-On Technology CorporationInventors: Shih-Chang Wang, Po-Chang Li, Ming-Chih Lai, Pin-Hao Hsu
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Publication number: 20150062932Abstract: A lighting device installation method includes the following steps. Firstly, a holder including a first stopping structure and a first engaging structure is fixed on an installation surface. Then, a lighting device including a second stopping structure and a third stopping structure is provided. The second stopping structure and the third stopping structure are collaboratively defined as a second engaging structure. Then, the second engaging structure of the lighting device is stopped by the first stopping structure of the holder, so that the lighting device is supported by the lower portion of the holder. Then, electrical connection between the lighting device and a power source is established. Afterwards, the second engaging structure of the lighting device is engaged with the first engaging structure of the holder, so that the lighting device is supported by the upper portion of the holder.Type: ApplicationFiled: August 29, 2013Publication date: March 5, 2015Applicant: LEOTEK Electronics CorporationInventors: Shih-Chang Wang, Po-Chang Li, Ming-Chun Wu, Pin-Hao Hsu, Ming-Chih Lai
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Publication number: 20140254149Abstract: An assembly structure of light-guiding cover is used in a lighting device. The lighting device comprises a light-emitting element. The assembly structure comprises a casing and a light-guiding cover. The casing has a receiving recess and a first engaging groove and a second engaging groove opposite to the first engaging groove, the light-emitting element is disposed within the receiving recess, and the first engaging groove and the second engaging groove are located at opposite two sides of the receiving recess. The light-guiding cover covers the receiving recess and has at least one aperture corresponding to the light-emitting element, wherein the light-guiding cover comprises a first engaging sheet and a second engaging sheet. The first engaging sheet is engaged with the first engaging groove. The second engaging sheet is disposed opposite to the first engaging sheet and engaged with the second engaging groove.Type: ApplicationFiled: May 3, 2013Publication date: September 11, 2014Applicant: LEOTEK Electronics CorporationInventors: Shih-Chang WANG, Po-Chang Li, Ming-Chih Lai, Pin-Hao Hsu
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Publication number: 20130286638Abstract: A luminaire and method of installing same on a mounting pole including a housing having a flange and a plurality of LEDs. The flange includes formed therein a plurality of spaced apart holes disposed along a line, a slot disposed along the line, and a central hole disposed along the line and between the slot and the spaced apart holes. The plurality of LEDs are attached to or disposed in the housing. The method includes hanging the luminaire on an upper mounting bolt extending from a mounting pole, sliding the upper mounting bolt along the slot so that a conduit hole and the central hole are at least partially aligned to each other and one of the plurality of spaced apart holes is aligned to a lower mounting hole, and installing a lower mounting bolt through a lower mounting hole and the one spaced apart hole aligned therewith.Type: ApplicationFiled: April 15, 2013Publication date: October 31, 2013Inventors: Shih-Chang Wang, Pin-Hao Hsu, Po-Chang Li, Chinmau James Hwang, Hamid Kashani
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Publication number: 20130250584Abstract: A light emitting device comprises a housing and a LED module. The housing comprises a first part and a second part connecting the first part, wherein the first part comprises a first side, a second side and a middle portion connecting the first side and the second side, and a thickness of the first side and a thickness of the second side are thinner than that of the middle portion. The LED module is disposed on the housing for emitting light.Type: ApplicationFiled: December 5, 2012Publication date: September 26, 2013Applicant: Leotek Electronics CorporationInventors: Shih-Chang WANG, Po-Chang LI, Pin-Hao HSU, Kun-Tsai WU
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Publication number: 20130235595Abstract: A housing of light emitting device including a first part for accommodating a light emitting diode module and providing a space for heat dissipation is disclosed. The first part includes an outline casing forming an enclosed room and at least one heat conductive structure disposed inside the enclosed room. The heat conductive structure couples to a heat dissipating side and a light emitting side of the outline casing.Type: ApplicationFiled: December 27, 2012Publication date: September 12, 2013Applicant: Leotek Electronics CorporationInventors: Shih-Chang WANG, Po-Chang Li, Ming-Chih Lai, Pin-Hao Hsu
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Publication number: 20080308258Abstract: A micro-channel heat sink comprises an upper cover layer and a cooling layer. The cooling layer comprises at least one inlet fluid tank, a plurality of micro-channels, and at least one outlet fluid tank. The inlet fluid tank can store and deliver the working fluids, and the outlet fluid tank collects the heated working fluid flowing through the plurality of micro-channels. The plurality of micro-channels are disposed between the inlet fluid tank and the outlet fluid tank, wherein the cross sectional area of each of the micro-channels increases along the direction towards the outlet fluid tank.Type: ApplicationFiled: May 16, 2008Publication date: December 18, 2008Applicant: NATIONAL TSING HUA UNIVERSITYInventors: CHIN PAN, PO CHANG LI, CHUN TING LU, KUN CHENG LIN