Patents by Inventor Yu-Tai Chang

Yu-Tai Chang 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).

  • Publication number: 20240371797
    Abstract: A semiconductor structure includes a core layer; a passive component disposed within the core layer; and a first redistribution layer disposed over the core layer, wherein the first redistribution layer includes a first interconnect, a second interconnect, and a third interconnect disposed between and electrically isolated from the first interconnect and the second interconnect. The third interconnect is electrically connected to the passive component, and at least one of the first interconnect and the second interconnect is electrically isolated from the passive component. A method of manufacturing the semiconductor structure includes providing a first bias between the first interconnect and the second interconnect, providing a second bias to the passive component through the third interconnect, wherein the first bias is greater than the second bias.
    Type: Application
    Filed: May 2, 2023
    Publication date: November 7, 2024
    Inventors: HSIANG-TAI LU, KUAN-LUNG WU, YU-WEI CHIU, WEN-CHIEN CHANG
  • Patent number: 12114547
    Abstract: Provided is a display panel, including a substrate, multiple pixel circuits, an insulating layer, multiple first electrodes, a first isolation structure, and a second isolation structure. The pixel circuits are located on the substrate. The insulating layer is located on the pixel circuits and has multiple through holes. The first electrodes are located on the insulating layer and are respectively electrically connected to the pixel circuits through the through holes. The first isolation structure is located on the insulating layer and overlaps the through holes. The second isolation structure includes multiple separating parts and multiple cover parts. The separating parts and the first isolation structure at least partially overlap, and the cover parts respectively overlap the through holes and the first isolation structure.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: October 8, 2024
    Assignee: Au Optronics Corporation
    Inventors: Kuo-Jui Chang, Wen-Tai Chen, Chi-Sheng Chiang, Yu-Chuan Liao, Chien-Sen Weng, Ming-Wei Sun
  • Patent number: 12109774
    Abstract: A heel cap manufacturing method includes the steps of: a) preparing a multilayer composite material; b) performing the first time of molding by thermal pressing to the multilayer composite material by a thermal pressing device to obtain a thermal pressed semi-product; c) taking out the thermal pressed semi-product from the thermal pressing device and fixing it to a heel cap mold; d) performing the second time of molding by cold pressing to the thermal pressed semi-product together with the heel cap mold in a cooling device to obtain a cooled semi-product; and e) demolding and rewarming the cooled semi-product to obtain a finished heel cap. The present invention uses the processing manner of molding twice by cold and thermal pressing to manufacture the structurally more complex heel cap, effectively lowering difficulty of the manufacturing process and raising production efficiency. A heel cap manufacturing equipment is also provided.
    Type: Grant
    Filed: October 1, 2021
    Date of Patent: October 8, 2024
    Assignee: DAH SHENG CHEMICAL INDUSTRY CO., LTD.
    Inventors: Heng-Tai Chang, Yu-Che Shen, Thi Bich Van Chung
  • Patent number: 12068433
    Abstract: A light-emitting device includes: a substrate having a top surface, wherein the top surface comprises a first portion and a second portion; a first semiconductor stack on the first portion, comprising a first upper surface and a first side wall; and a second semiconductor stack on the first upper surface, comprising a second upper surface and a second side wall, and wherein the second side wall connects the first upper surface; wherein the first semiconductor stack comprises a dislocation stop layer; wherein the dislocation stop layer comprises AlGaN; and wherein the first side wall and the second portion of the top surface form an acute angle ? between thereof.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: August 20, 2024
    Assignee: EPISTAR CORPORATION
    Inventors: Yen-Tai Chao, Sen-Jung Hsu, Tao-Chi Chang, Wei-Chih Wen, Ou Chen, Yu-Shou Wang, Chun-Hsiang Tu, Jing-Feng Huang
  • Patent number: 9319971
    Abstract: A frequency adjustment method is provided for adjusting a frequency of a reference oscillating signal from an initial oscillation frequency to an adjusted oscillation frequency. The frequency adjustment method includes steps of: dividing a frequency scan section into M scan frequencies; down-converting a signal according to the M scan frequencies to obtain M down-converted signals; performing a correlation calculation operation on the M down-converted signals, respectively, to obtain M correlation results; grouping the M scan frequencies into N frequency groups each containing P selected frequencies, with the P selected frequencies corresponding to P consecutive scan frequencies; performing a group calculation on the N frequency groups, respectively, to obtain N group calculation results; and selecting a target frequency group from the N frequency groups according to the N group calculations results, and obtaining the adjusted oscillation frequency from the target frequency group.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: April 19, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Wei-Jen Chen, Chi-Yuan Peng, Ping-Hung Chiang, Yu-Tai Chang
  • Patent number: 9215605
    Abstract: A method for estimating a frequency difference between a transmission terminal and a reception terminal according to a reception signal is provided. The method includes steps of: in a first period, receiving and storing a first part of the reception signal; in a second period, frequency shifting the first part of the reception signal according to an L number of sweep frequencies, and correspondingly obtaining multiple first part correlation results, where L is a positive integer; in the second period, receiving and storing a second part of the reception signal; in a third period, frequency shifting the second part of the reception signal according to the L number of sweep frequencies, and correspondingly obtaining multiple second part correlation results; and estimating the frequency difference according to the first and second part correlation results.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: December 15, 2015
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Chi-Yuan Peng, Chun-Jung Wu, Huan-Hsiu Tseng, Ping-Hung Chiang, Yu-Tai Chang, Francesc Boixadera
  • Patent number: 9060334
    Abstract: A wireless communication device is a mobile station of a wireless communication network system. In an idle mode, when the wireless communication device enters a startup state from a sleep state to prepare for receiving a paging message, base station (BS) measurement is performed at least once before the paging message is received.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: June 16, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Fabien Petitgrand, Yu-Tai Chang, Chao-Yuan Hsu, Li-Ping Yu, Tai-Li Chiang
  • Patent number: 8750815
    Abstract: A communication device including a receiving unit and a decision-making unit is provided. The receiving unit receives a first burst in a paging message provided from a base station. After comparing a signal-to-noise ratio to a threshold, the decision-making unit decides, based on the comparison result, the judging mechanism for judging whether the paging message is a dummy paging message. The signal-to-noise ratio is associated with the channel via which the first burst passed.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: June 10, 2014
    Assignee: MStar Semiconductor, Inc.
    Inventors: Yu-Tai Chang, Chih Yu Chen, Chia Sheng Peng
  • Publication number: 20140073315
    Abstract: A method for estimating a frequency difference between a transmission terminal and a reception terminal according to a reception signal is provided. The method includes steps of: in a first period, receiving and storing a first part of the reception signal; in a second period, frequency shifting the first part of the reception signal according to an L number of sweep frequencies, and correspondingly obtaining multiple first part correlation results, where L is a positive integer; in the second period, receiving and storing a second part of the reception signal; in a third period, frequency shifting the second part of the reception signal according to the L number of sweep frequencies, and correspondingly obtaining multiple second part correlation results; and estimating the frequency difference according to the first and second part correlation results.
    Type: Application
    Filed: March 18, 2013
    Publication date: March 13, 2014
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Chi-Yuan Peng, Chun-Jung Wu, Huan-Hsiu Tseng, Ping-Hung Chiang, Yu-Tai Chang, Francesc Boixadera
  • Publication number: 20130237219
    Abstract: A frequency adjustment method is provided for adjusting a frequency of a reference oscillating signal from an initial oscillation frequency to an adjusted oscillation frequency. The frequency adjustment method includes steps of: dividing a frequency scan section into M scan frequencies; down-converting a signal according to the M scan frequencies to obtain M down-converted signals; performing a correlation calculation operation on the M down-converted signals, respectively, to obtain M correlation results; grouping the M scan frequencies into N frequency groups each containing P selected frequencies, with the P selected frequencies corresponding to P consecutive scan frequencies; performing a group calculation on the N frequency groups, respectively, to obtain N group calculation results; and selecting a target frequency group from the N frequency groups according to the N group calculations results, and obtaining the adjusted oscillation frequency from the target frequency group.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 12, 2013
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Wei-Jen Chen, Chi-Yuan Peng, Ping-Hung Chiang, Yu-Tai Chang
  • Patent number: 8531270
    Abstract: A communication device including a receiving unit and a signal processing module having a simulation unit and a decision unit is provided. The receiving unit receives a first burst of a paging message provided from a base station. Base on a reference burst code and an estimated channel impulse response of the communication channel, the simulation unit generates a simulation burst. The decision unit then determines if the paging message is a dummy message in accordance with the first burst and the simulation burst. The decision unit requests the receiving unit to stop receiving the paging message once the paging message is determined to be a dummy message.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: September 10, 2013
    Assignee: Mstar Semiconductor, Inc.
    Inventors: Yu Tai Chang, Chia Sheng Peng, Shao Ping Hung, Chih Yu Chen
  • Patent number: 8223070
    Abstract: A high accuracy satellite signal receiving controller and associated method is provided. The high accuracy satellite signal receiving controller includes a frequency synthesizer, and an analog-to-digital converter (ADC), a Global Positioning System (GPS) receiving module and a control unit. The frequency synthesizer, coupled to an external non-temperature-compensated crystal oscillator (non-TXCO), generates an oscillating frequency signal to the GPS receiving module. The ADC converts an analog temperature signal into a digital temperature signal. The control unit, coupled to the ADC, adaptively updates temperature/frequency offset data.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: July 17, 2012
    Assignee: Mstar Semiconductor, Inc.
    Inventors: Mikhail Vasilyev, Andrei Bochkovskiy, Hsin-Min Peng, Tsai-Hsin Tsai, Chun-Hsien Wu, Ping-Hsin Kan, Yu Tai Chang, Steve Wiyi Yang
  • Publication number: 20120064937
    Abstract: A wireless communication device is a mobile station of a wireless communication network system. In an idle mode, when the wireless communication device enters a startup state from a sleep state to prepare for receiving a paging message, base station (BS) measurement is performed at least once before the paging message is received.
    Type: Application
    Filed: July 18, 2011
    Publication date: March 15, 2012
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Fabien Petitgrand, Yu-Tai Chang, Chao-Yuan Hsu, Li-Ping Yu, Tai-Li Chiang
  • Publication number: 20120021711
    Abstract: A communication device including a receiving unit and a decision-making unit is provided. The receiving unit receives a first burst in a paging message provided from a base station. After comparing a signal-to-noise ratio to a threshold, the decision-making unit decides, based on the comparison result, the judging mechanism for judging whether the paging message is a dummy paging message. The signal-to-noise ratio is associated with the channel via which the first burst passed.
    Type: Application
    Filed: April 28, 2011
    Publication date: January 26, 2012
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Yu-Tai Chang, Chih Yu Chen, Chia Sheng Peng
  • Publication number: 20110311000
    Abstract: A communication device including a receiving unit and a signal processing module having a simulation unit and a decision unit is provided. The receiving unit receives a first burst of a paging message provided from a base station. Base on a reference burst code and an estimated channel impulse response of the communication channel, the simulation unit generates a simulation burst. The decision unit then determines if the paging message is a dummy message in accordance with the first burst and the simulation burst. The decision unit requests the receiving unit to stop receiving the paging message once the paging message is determined to be a dummy message.
    Type: Application
    Filed: September 17, 2010
    Publication date: December 22, 2011
    Applicant: MStar Semiconductor, Inc.
    Inventors: Yu Tai Chang, Chia Sheng Peng, Shao Ping Hung, Chih Yu Chen
  • Publication number: 20090262018
    Abstract: A high accuracy satellite signal receiving controller and associated method is provided. The high accuracy satellite signal receiving controller includes a frequency synthesizer, and an analog-to-digital converter (ADC), a Global Positioning System (GPS) receiving module and a control unit. The frequency synthesizer, coupled to an external non-temperature-compensated crystal oscillator (non-TXCO), generates an oscillating frequency signal to the GPS receiving module. The ADC converts an analog temperature signal into a digital temperature signal. The control unit, coupled to the ADC, adaptively updates temperature/frequency offset data.
    Type: Application
    Filed: February 5, 2009
    Publication date: October 22, 2009
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Mikhail VASILYEV, Andrei BOCHKOVSKIY, Hsin-Min PENG, TSAI-HSIN TSAI, Chun-Hsien WU, Ping-Hsin KAN, Yu Tai CHANG, Steve Wiyi YANG
  • Patent number: 7598906
    Abstract: The present invention provides a global positioning system (GPS) and a method for implementing the system. The GPS includes a control unit, a GPS RF processing circuit and a storage unit. The control unit includes a microprocessor and a mask ROM storing reference information. The GPS RF processing circuit is coupled to the control unit for receiving an RF signal, transforming the RF signal into a base-band or an intermediate frequency signal and transmitting the base-band or the intermediate frequency signal to the control unit. The storage unit is coupled to the control unit to temporally store a program code. The microprocessor executes the program code and refers to the reference information to achieve global positioning.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: October 6, 2009
    Assignee: Mstar Semiconductor, Inc.
    Inventors: Steve Wiyi Yang, Yu-Tai Chang
  • Publication number: 20080024362
    Abstract: The present invention provides a global positioning system (GPS) and a method for implementing the system. The GPS includes a control unit, a GPS RF processing circuit and a storage unit. The control unit includes a microprocessor and a mask ROM storing reference information. The GPS RF processing circuit is coupled to the control unit for receiving an RF signal, transforming the RF signal into a base-band or an intermediate frequency signal and transmitting the base-band or the intermediate frequency signal to the control unit. The storage unit is coupled to the control unit to temporally store a program code. The microprocessor executes the program code and refers to the reference information to achieve global positioning.
    Type: Application
    Filed: November 20, 2006
    Publication date: January 31, 2008
    Inventors: Steve Wiyi Yang, Yu-Tai Chang