Patents by Inventor Yu-Kang LU
Yu-Kang LU 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: 10254167Abstract: A method for sorting a light source is to be implemented by a computer and includes configuring the computer to determine whether or not a to-be-sorted light source is different from a reference light source by comparing features of a curve associated with measured spectral data of the to-be-sorted light source, with features of a reference curve associated with reference spectral data of a reference light source.Type: GrantFiled: July 8, 2013Date of Patent: April 9, 2019Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology Corp.Inventor: Yu-Kang Lu
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Patent number: 10128420Abstract: The present disclosure discloses an LED package structure and a chip-scale light emitting unit. The chip-scale light emitting unit includes an LED chip, a phosphor sheet, and at least one light guiding group. The phosphor sheet covers entirely a top surface of the LED chip. The phosphor sheet has a light emitting surface arranged away from the LED chip, and the light emitting surface has a central region and a ring-shaped region surrounding the central region. The light guiding group is disposed on the ring-shaped region and covers at least 60% of an area of the ring-shaped region of the phosphor sheet, and the central region is not covered by the light guiding group. The light guiding group includes a plurality of light guiding micro-structures.Type: GrantFiled: December 29, 2017Date of Patent: November 13, 2018Assignee: LITE-ON TECHNOLOGY CORPORATIONInventors: Yu-Yu Chang, Yu-Kang Lu, Yung-Chang Jen
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Publication number: 20180190885Abstract: The present disclosure discloses an LED package structure and a chip-scale light emitting unit. The chip-scale light emitting unit includes an LED chip, a phosphor sheet, and at least one light guiding group. The phosphor sheet covers entirely a top surface of the LED chip. The phosphor sheet has a light emitting surface arranged away from the LED chip, and the light emitting surface has a central region and a ring-shaped region surrounding the central region. The light guiding group is disposed on the ring-shaped region and covers at least 60% of an area of the ring-shaped region of the phosphor sheet, and the central region is not covered by the light guiding group. The light guiding group includes a plurality of light guiding micro-structures.Type: ApplicationFiled: December 29, 2017Publication date: July 5, 2018Inventors: YU-YU CHANG, YU-KANG LU, YUNG-CHANG JEN
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Patent number: 8835942Abstract: An LED module includes at least two LED package units and at least one connecting unit. Each LED package unit includes at least one first engaging portion, at least one first conductive portion, and at least one LED chip connected electrically to the first engaging portion. The connecting unit includes at least two second engaging portions, and at least one second conductive portion having two opposite end sections extending respectively to the second engaging portions. When the second engaging portions of the connecting unit engaged with the first engaging portions of the LED package units, respectively, the end sections of the second conductive portion contact electrically and respectively the corresponding first conductive portions so as to connect electrically the LED chips of the LED package units.Type: GrantFiled: February 23, 2011Date of Patent: September 16, 2014Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology Corp.Inventors: Chen-Yu Chen, Yu-Kang Lu, Yan-Yu Wang
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Publication number: 20140025340Abstract: A method for sorting a light source is to be implemented by a computer and includes configuring the computer to determine whether or not a to-be-sorted light source is different from a reference light source by comparing features of a curve associated with measured spectral data of the to-be-sorted light source, with features of a reference curve associated with reference spectral data of a reference light source.Type: ApplicationFiled: July 8, 2013Publication date: January 23, 2014Inventor: YU-KANG LU
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Patent number: 8471491Abstract: A method for operating an AC LED is disclosed. The method operates with an assumption that a linear relationship exists between the voltage and current of the AC LED operating at an active region. Hence, a first driving voltage and a second driving voltage are applied to the AC LED for respectively measuring a first driving current and a second driving current, and an interpolation is used for obtaining a third driving voltage. The third driving voltage is the predicted driving voltage for the AC LED. The method is capable of determining the actual driving voltage precisely and rapidly before the follow-up tests for other AC LEDs may proceed.Type: GrantFiled: October 12, 2010Date of Patent: June 25, 2013Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology CorporationInventor: Yu-Kang Lu
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Publication number: 20120280635Abstract: An alternating current (AC) light-emitting device includes a waveform generating unit and an AC light-emitting unit. The waveform generating unit is configured to receive an AC electrical signal and to generate a drive signal by adjusting one of: voltage amplitude of the AC electrical signal during one of positive and negative half-cycles of the AC electrical signal, and waveform level of the AC electrical signal. The AC light-emitting unit includes a first light-emitting component and a second light-emitting component, and the second light-emitting component emits a different wavelength light compared to that emitted by the first light-emitting component. The first and second light-emitting components are electrically coupled to the waveform generating unit to receive the drive signal, and emit light according to the drive signal.Type: ApplicationFiled: March 30, 2012Publication date: November 8, 2012Applicants: LITE-ON TECHNOLOGY CORP., SILITEK ELECTRONIC (GUANGZHOU) CO., LTD.Inventors: YU-KANG LU, WEN-HSIANG LIN, SHIH-CHIANG YEN
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Publication number: 20110210346Abstract: An LED module includes at least two LED package units and at least one connecting unit. Each LED package unit includes at least one first engaging portion, at least one first conductive portion, and at least one LED chip connected electrically to the first engaging portion. The connecting unit includes at least two second engaging portions, and at least one second conductive portion having two opposite end sections extending respectively to the second engaging portions. When the second engaging portions of the connecting unit engaged with the first engaging portions of the LED package units, respectively, the end sections of the second conductive portion contact electrically and respectively the corresponding first conductive portions so as to connect electrically the LED chips of the LED package units.Type: ApplicationFiled: February 23, 2011Publication date: September 1, 2011Applicants: SILITEK ELECTRONIC (GUANGZHOU) CO., LTD., LITE-ON TECHNOLOGY CORP.Inventors: CHEN-YU CHEN, YU-KANG LU, YAN-YU WANG
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Publication number: 20110187281Abstract: A method for operating an AC LED is disclosed. The method operates with an assumption that a linear relationship exists between the voltage and current of the AC LED operating at an active region. Hence, a first driving voltage and a second driving voltage are applied to the AC LED for respectively measuring a first driving current and a second driving current, and an interpolation is used for obtaining a third driving voltage. The third driving voltage is the predicted driving voltage for the AC LED. The method is capable of determining the actual driving voltage precisely and rapidly before the follow-up tests for other AC LEDs may proceed.Type: ApplicationFiled: October 12, 2010Publication date: August 4, 2011Applicants: SILITEK ELECTRONIC (GUANGZHOU) CO., LTD., LITE-ON TECHNOLOGY CORPORATIONInventor: Yu-Kang LU