Patents by Inventor Wen Ku

Wen Ku 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).

  • Patent number: 10658544
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of beveled trenches formed in the semiconductor layer sequence; a plurality of protruding structures respectively formed in the plurality of beveled trenches; a dielectric layer formed on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches; a reflecting layer interposed between the semiconductor layer sequence and the dielectric layer; and a metal layer formed along the inner sidewall of the plurality of beveled trenches, wherein the dielectric layer, the reflecting layer and the metal layer are overlapping, the plurality of protruding structures and the reflecting layer are not overlapping.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: May 19, 2020
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Yu-Chen Yang, Li-Ping Jou, Hui-Chun Yeh, Yi-Wen Ku
  • Publication number: 20190237624
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of beveled trenches formed in the semiconductor layer sequence; a plurality of protruding structures respectively formed in the plurality of beveled trenches; a dielectric layer formed on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches; a reflecting layer interposed between the semiconductor layer sequence and the dielectric layer; and a metal layer formed along the inner sidewall of the plurality of beveled trenches, wherein the dielectric layer, the reflecting layer and the metal layer are overlapping, the plurality of protruding structures and the reflecting layer are not overlapping.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Inventors: Chao-Hsing CHEN, Yu-Chen YANG, Li-Ping JOU, Hui-Chun YEH, Yi-Wen KU
  • Patent number: 10304999
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of beveled trenches formed in the semiconductor layer sequence; a plurality of protruding structures respectively formed in the plurality of beveled trenches; a dielectric layer formed on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches; a reflecting layer interposed between the semiconductor layer sequence and the dielectric layer; and a metal layer formed along the inner sidewall of the plurality of beveled trenches, wherein the dielectric layer, the reflecting layer and the metal layer are overlapping, the plurality of protruding structures and the reflecting layer are not overlapping.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: May 28, 2019
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Yu-Chen Yang, Li-Ping Jou, Hui-Chun Yeh, Yi-Wen Ku
  • Publication number: 20180108807
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of beveled trenches formed in the semiconductor layer sequence; a plurality of protruding structures respectively formed in the plurality of beveled trenches; a dielectric layer formed on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches; a reflecting layer interposed between the semiconductor layer sequence and the dielectric layer; and a metal layer formed along the inner sidewall of the plurality of beveled trenches, wherein the dielectric layer, the reflecting layer and the metal layer are overlapping, the plurality of protruding structures and the reflecting layer are not overlapping.
    Type: Application
    Filed: December 19, 2017
    Publication date: April 19, 2018
    Inventors: Chao-Hsing CHEN, Yu-Chen YANG, Li-Ping JOU, Hui-Chun YEH, Yi-Wen KU
  • Patent number: 9876138
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of beveled trenches formed in the semiconductor layer sequence; a plurality of protruding structures respectively formed in the plurality of beveled trenches; a dielectric layer formed on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches; a reflecting layer interposed between the semiconductor layer sequence and the dielectric layer; and a metal layer formed along the inner sidewall of the plurality of beveled trenches, wherein the dielectric layer, the reflecting layer and the metal layer are overlapping, the plurality of protruding structures and the reflecting layer are not overlapping.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: January 23, 2018
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Yu-Chen Yang, Li-Ping Jou, Hui-Chun Yeh, Yi-Wen Ku
  • Patent number: 9826911
    Abstract: A wearable device is provided. The wearable device includes a photon sensor, a processor, and an output unit. The photon sensor senses light reflected from a specific region and transforms the sensed light to a plurality of electric-signal components. The processor receives the electric-signal components sensed within a period to form a dimensional sensing signal. The processor extracts a feature of a waveform of the dimensional sensing signal and determines whether a predetermined heart condition of the object is present according to the feature of the waveform of the dimensional sensing signal to generate a determination signal. The output unit is coupled to the processor. The output unit receives the determination signal and generates an alarm signal according to the determination signal.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: November 28, 2017
    Assignee: MEDIATEK INC.
    Inventors: Chih-Ming Fu, Shu-Yu Hsu, Po-Wen Ku
  • Patent number: 9687164
    Abstract: Embodiments of the invention disclose a method and a system for signal analyzing and a processing module of the system. The signal analyzing system includes a plurality of first electrodes, a plurality of second electrodes, and a processing module. The first electrodes transmit a plurality of first input signals. The second electrodes transmit a plurality of second input signals. The processing module generates a body electrical signal according to at least one of the plurality of first input signals and at least one of the plurality of second input signals, generates a first filtered signal corresponding to the plurality of first input signals, generates a second filtered signal corresponding to the plurality of second input signals, and generates a lead signal according to the body electrical signal, the first filtered signal and the second filtered signal.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: June 27, 2017
    Assignee: MEDIATEK INC.
    Inventor: Po-Wen Ku
  • Publication number: 20170012167
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of beveled trenches formed in the semiconductor layer sequence; a plurality of protruding structures respectively formed in the plurality of beveled trenches; a dielectric layer formed on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches; a reflecting layer interposed between the semiconductor layer sequence and the dielectric layer; and a metal layer formed along the inner sidewall of the plurality of beveled trenches, wherein the dielectric layer, the reflecting layer and the metal layer are overlapping, the plurality of protruding structures and the reflecting layer are not overlapping.
    Type: Application
    Filed: September 22, 2016
    Publication date: January 12, 2017
    Inventors: Chao-Hsing CHEN, Yu-Chen YANG, Li-Ping JOU, Hui-Chun YEH, Yi-Wen KU
  • Publication number: 20160354000
    Abstract: A wearable device is provided. The wearable device includes a photon sensor, a processor, and an output unit. The photon sensor senses light reflected from a specific region and transforms the sensed light to a plurality of electric-signal components. The processor receives the electric-signal components sensed within a period to form a dimensional sensing signal. The processor extracts a feature of a waveform of the dimensional sensing signal and determines whether a predetermined heart condition of the object is present according to the feature of the waveform of the dimensional sensing signal to generate a determination signal. The output unit is coupled to the processor. The output unit receives the determination signal and generates an alarm signal according to the determination signal.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 8, 2016
    Inventors: Chih-Ming FU, Shu-Yu HSU, Po-Wen KU
  • Patent number: 9472725
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of protruding structures; a plurality of beveled trenches in the semiconductor layer sequence and respectively accommodating the plurality of protruding structures; a dielectric layer on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches, wherein the dielectric layer comprises a surface perpendicular to a thickness direction of the semiconductor layer sequence; a metal layer formed along the inner sidewall of the plurality of beveled trenches and extending to the surface of the dielectric layer, wherein the metal layer is insulated from the second semiconductor layer by the dielectric layer; and a first electrode formed on the plurality of protru
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: October 18, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Yu-Chen Yang, Li-Ping Jou, Hui-Chun Yeh, Yi-Wen Ku
  • Publication number: 20160235316
    Abstract: A physiological signal processing circuit includes an amplifier, an analog-to-digital converter, and a physiological characteristic detector circuit. The amplifier is configured to amplify an analog physiological signal of a user for providing an amplified signal. The analog-to-digital converter is coupled to the amplifier, and is configured to convert the amplified signal to a digital signal. The physiological characteristic detector circuit is coupled to the analog-to-digital converter, and configured to detect a physiological characteristic of the user from the digital signal so as to provide an output signal.
    Type: Application
    Filed: February 16, 2015
    Publication date: August 18, 2016
    Inventor: Po-Wen KU
  • Patent number: 9276173
    Abstract: A light-emitting device comprises: a light-emitting stack having an upper side, a first edge having an end point, and a second edge opposite to the first edge; a first bonding region arranged on the upper side, near the first edge, and far from the end point; a second bonding region separated from to the first bonding region by a first distance and being far from the end point; a third bonding region arranged on the upper side; a fourth bonding region separated from the third bonding region by a second distance longer than the first distance; a first electrode connected to the first bonding region; a second electrode connected to the second bonding region; a third electrode connected to the third bonding region; a fourth electrode connected to the fourth bonding region; and a fifth electrode connected to the first bonding region and pointing to the fourth bonding region.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: March 1, 2016
    Assignee: Epistar Corporation
    Inventors: Chien-Fu Shen, Cheng-Ta Kuo, Wei-Shou Chen, Tsung-Hsien Liu, Yi-Wen Ku, Min-Hsun Hsieh
  • Publication number: 20160007862
    Abstract: A personal health device includes multiple photoplethysmogram (PPG) sensors, multiple electrodes and a processing circuit. The PPG sensors are configured for sensing multiple PPG signals. The electrodes are configured for sensing multiple skin voltages. The processing circuit is coupled to the PPG sensors and the electrodes and configured for estimating an ankle brachial pressure index (ABI) according to the PPG signals and the skin voltages.
    Type: Application
    Filed: July 14, 2014
    Publication date: January 14, 2016
    Inventor: Po-Wen KU
  • Publication number: 20150366530
    Abstract: A device for detecting fistula stenosis is provided. The device includes a physiological signal sensor, an acoustic receiver and a processing circuit. The physiological signal sensor is configured for providing a physiological signal of a user. The acoustic receiver is configured for detecting a sound from a fistula of the user to generate a sound signal. The processing circuit is configured for providing a degree of fistula stenosis according to the physiological signal of the user and the sound signal.
    Type: Application
    Filed: June 24, 2014
    Publication date: December 24, 2015
    Inventor: Po-Wen KU
  • Patent number: 9159881
    Abstract: Disclosed is a light-emitting device comprising: a semiconductor stack layer; a reflective layer on the semiconductor stack layer; a first buffer layer comprising a compound comprising a metallic element and a non-metallic element on the reflective layer; a first electrode; and an electrical insulating layer disposed between the first buffer layer and the first electrode.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: October 13, 2015
    Assignee: EPISTAR CORPORATION
    Inventors: Jia-Kuen Wang, Chien-Fu Shen, Chao-Hsing Chen, Yu-Chen Yang, Hui-Chun Yeh, Yi-Wen Ku, Hung-Che Chen, Chih-Nan Lin
  • Publication number: 20150236208
    Abstract: A light-emitting device comprises a semiconductor layer sequence comprising a first semiconductor layer having a first electrical conductivity, a second semiconductor layer having a second electrical conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer; a plurality of protruding structures; a plurality of beveled trenches in the semiconductor layer sequence and respectively accommodating the plurality of protruding structures; a dielectric layer on the second semiconductor layer and an inner sidewall of the plurality of beveled trenches, wherein the dielectric layer comprises a surface perpendicular to a thickness direction of the semiconductor layer sequence; a metal layer formed along the inner sidewall of the plurality of beveled trenches and extending to the surface of the dielectric layer, wherein the metal layer is insulated from the second semiconductor layer by the dielectric layer; and a first electrode formed on the plurality of protru
    Type: Application
    Filed: May 6, 2015
    Publication date: August 20, 2015
    Inventors: Chao-Hsing CHEN, Yu-Chen YANG, Li-Ping JOU, Hui-Chun YEH, Yi-Wen KU
  • Patent number: 9048379
    Abstract: A light-emitting device of an embodiment of the present application comprises a semiconductor layer sequence provided with a first main side, a second main side, and an active layer; a beveled trench formed in the semiconductor layer sequence, having a top end close to the second main side, a bottom end, and an inner sidewall connecting the top end and the bottom end. In the embodiment, the inner sidewall is an inclined surface. The light-emitting device further comprises a dielectric layer disposed on the inner sidewall of the beveled trench and the second main side; a first metal layer formed on the dielectric layer; a carrier substrate; and a first connection layer connecting the carrier substrate and the semiconductor layer sequence.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: June 2, 2015
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Yu-Chen Yang, Li-Ping Jou, Hui-Chun Yeh, Yi-Wen Ku
  • Patent number: 9035329
    Abstract: The light-emitting device having an equivalent circuit, includes at least four terminals, numbered from first terminal to fourth terminal, for electrical power feeding; a first light-emitting diode, arranged between the first terminal and the second terminal, configured to not emit light when a voltage is applied between the second terminal and one of the third terminal and the fourth terminal, and configured to emit light when a. voltage is applied between the first terminal and one of the third terminal and the four the terminal; and a second light-emitting diode, arranged between the third terminal and the fourth terminal, and configured to not emit light when the voltage is applied between the third terminal and one of the first terminal and the second terminal and configured to emit light when a voltage is applied between the fourth terminal and one of the first terminal and the second terminal.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: May 19, 2015
    Assignee: Epistar Corporation
    Inventors: Chao-Hsing Chen, Chien-Kai Chung, Hui-chen Yeh, Yi-Wen Ku
  • Patent number: 9031096
    Abstract: A multimedia data system comprising a synchronization unit. The synchronization unit receives a demodulated bitstream, checks whether a FAW pattern corresponding to a candidate of the bitstream exists, checks whether an additional information corresponding to the candidate of the bitstream is valid when the FAW pattern exists, determines a hit weighting corresponding to the candidate according to the checking result, determines whether the hit weighting meets a criterion and outputs a synchronization signal when the hit weighting meets the criterion.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: May 12, 2015
    Assignee: MediaTek Inc.
    Inventors: Hsing-Ju Wei, Chien-Hua Hsu, Po-Wen Ku
  • Publication number: 20140367733
    Abstract: A light-emitting device comprises: a light-emitting stack having an upper side, a first edge having an end point, and a second edge opposite to the first edge; a first bonding region arranged on the upper side, near the first edge, and far from the end point; a second bonding region separated from to the first bonding region by a first distance and being far from the end point; a third bonding region arranged on the upper side; a fourth bonding region separated from the third bonding region by a second distance longer than the first distance; a first electrode connected to the first bonding region; a second electrode connected to the second bonding region; a third electrode connected to the third bonding region; a fourth electrode connected to the fourth bonding region; and a fifth electrode connected to the first bonding region and pointing to the fourth bonding region.
    Type: Application
    Filed: September 2, 2014
    Publication date: December 18, 2014
    Inventors: Chien-Fu SHEN, Cheng-Ta Kuo, Wei-Shou Chen, Tsung-Hsien Liu, Yi-Wen Ku, Min-Hsun Hsieh