Patents by Inventor Sheng-Kai Chang

Sheng-Kai 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: 20240154021
    Abstract: A p-GaN high-electron-mobility transistor (HEMT) includes a buffer layer stacked on a substrate, a channel layer stacked on the buffer layer, a supply layer stacked on the channel layer, a doped layer stacked on the supply layer, and a hydrogen barrier layer covering the supply layer and the doped layer. A source and a drain are electrically connected to the channel layer and the supply layer, respectively. A gate is located on the doped layer. The hydrogen barrier layer is doped with fluorine.
    Type: Application
    Filed: December 29, 2022
    Publication date: May 9, 2024
    Inventors: TING-CHANG CHANG, Wei-Chen Huang, Shih-Kai Lin, Yong-Ci Zhang, Sheng-Yao Chou, Chung-Wei Wu, Po-Hsun Chen
  • Publication number: 20230420429
    Abstract: A semiconductor structure may include an interposer including on-interposer bump structures, at least one semiconductor die bonded to a first subset of the on-interposer bump structures through first solder material portions, at least one spacer die bonded to a second subset of the on-interposer bump structures through second solder material portions, and a molding compound die frame laterally surrounding each of the at least one semiconductor die and the at least one spacer die. Each of the at least one semiconductor die includes a respective set of transistors and a respective set of metal interconnect structures. Each of the at least one spacer die is free from any transistor therein.
    Type: Application
    Filed: June 24, 2022
    Publication date: December 28, 2023
    Inventors: Sheng-Kai Chang, Leo Li, Chung-Hsien Hun, Lieh-Chuan Chen, Chien-Li Kuo
  • Publication number: 20230337146
    Abstract: A Wi-Fi power-adjusting method is provided. The Wi-Fi power-adjusting method is applied to a Wi-Fi power-adjusting device. The Wi-Fi power-adjusting method includes the step of determining whether the Wi-Fi power-adjusting device is in a vehicle. When the Wi-Fi power-adjusting device is in the vehicle, the method adjusts the Wi-Fi Tx power of the Wi-Fi power-adjusting device based on a set value corresponding to the vehicle. The set value corresponds to the first power coverage of the Wi-Fi Tx power.
    Type: Application
    Filed: April 14, 2022
    Publication date: October 19, 2023
    Inventors: Wang-Hsin KUO, Sheng-Kai CHANG
  • Patent number: 11736998
    Abstract: A communications apparatus and associated method communicating with at least one cellular network includes a radio transceiver and a processor. The communications apparatus includes a radio transceiver, capable of transmitting or receiving wireless radio frequency signals to or from a cellular network; and a processor. The processor is configured to: receive an incoming call request message that will trigger a Circuit Switch Fall Back (CSFB) procedure or a Evolved Packet System Fall Back (EPS FB) procedure from the cellular network via the radio transceiver, query a user to accept or reject the incoming call request before triggering the CSFB procedure or the EPS FB procedure, and determine whether to trigger the CSFB procedure or the EPS FB procedure based on a response to the query from the user.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: August 22, 2023
    Assignee: MEDIATEK INC.
    Inventors: Guan-Jie Huang, Tzu-Wen Chang, Kuan-Wei Chen, Yu-Hua Huang, Teng Ma, Sheng-Kai Chang
  • Publication number: 20230085153
    Abstract: The present invention provides a controller of a tethering device, wherein the controller includes a tethering manager and a cellular configuration manager. The tethering manager is configured to generating tethering parameters of at least one network interface of the tethering device, wherein the at least one network interface of the tethering device is used to communicate with an electronic device, and the electronic device shares a cellular network of the tethering device via the at least one network interface. The cellular configuration manager is configured to determine a first cellular mode according to the tethering parameters of at least one network interface, to control a cellular modem to use the first cellular mode.
    Type: Application
    Filed: September 5, 2022
    Publication date: March 16, 2023
    Applicant: MEDIATEK INC.
    Inventors: Sheng-Kai Chang, Wang-Hsin Kuo
  • Publication number: 20230064722
    Abstract: The present invention provides a control method of a tethering device, wherein the control method includes the steps of: receiving cellular information of the tethering device, and determining a first tethering mode according to the cellular information; and using the first tethering mode to configure at least one interface of the tethering device, wherein the at least one interface of the tethering device is used to communicate with an electronic device, and the electronic device shares a cellular network of the tethering device via the at least one interface.
    Type: Application
    Filed: July 20, 2022
    Publication date: March 2, 2023
    Applicant: MEDIATEK INC.
    Inventors: Sheng-Kai Chang, Wang-Hsin Kuo
  • Patent number: 11300880
    Abstract: A coating system includes supporting pins, a suction plane, and a calibrating disk. The suction plane is located between the supporting pins, and the calibrating disk is configured to dispose on the supporting pins or the suction plane. The calibrating disk includes a round top surface and a round bottom surface being opposite to the round top surface. The round bottom surface has a round plane and a dependable wall surrounding the round plane, and an edge of the round plane and an edge of the round bottom surface are concentric. The dependable wall is configured to limited horizontal movement of the supporting pins, and the round plane is configured to cover the suction plane. A calibration method of the coating system is also provided.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: April 12, 2022
    Assignee: NANYA TECHNOLOGY CORPORATION
    Inventor: Sheng-Kai Chang
  • Publication number: 20210400550
    Abstract: A communications apparatus and associated method communicating with at least one cellular network includes a radio transceiver and a processor. The communications apparatus includes a a radio transceiver, capable of transmitting or receiving wireless radio frequency signals to or from a cellular network; and a processor. The processor is configured to: receive an incoming call request message that will trigger a Circuit Switch Fall Back (CSFB) procedure or a Evolved Packet System Fall Back (EPS FB) procedure from the cellular network via the radio transceiver, query a user to accept or reject the incoming call request before triggering the CSFB procedure or the EPS FB procedure, and determine whether to trigger the CSFB procedure or the EPS FB procedure based on a response to the query from the user.
    Type: Application
    Filed: September 3, 2021
    Publication date: December 23, 2021
    Inventors: Guan-Jie HUANG, Tzu-Wen CHANG, Kuan-Wei CHEN, Yu-Hua HUANG, Teng MA, Sheng-Kai CHANG
  • Patent number: 11140593
    Abstract: A communications apparatus communicating with at least one cellular network includes a radio transceiver and a processor. The radio transceiver is capable of transmitting or receiving wireless radio frequency signals to or from an air interface in the cellular network. The processor is configured to determine whether an inter-RAT change will be triggered in a subsequent procedure when the communications apparatus is in a connected mode. When the processor determines that an inter-RAT change procedure will be triggered, the processor is configured to selectively perform a predetermined procedure instead of the subsequent procedure to avoid the inter-RAT change.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: October 5, 2021
    Assignee: MEDIATEK INC.
    Inventors: Guan-Jie Huang, Tzu-Wen Chang, Kuan-Wei Chen, Yu-Hua Huang, Teng Ma, Sheng-Kai Chang
  • Patent number: 11129239
    Abstract: The wireless communication device includes one or more wireless transceivers and a controller. The one or more wireless transceivers detect(s) one or more first frequency bands of one or more cellular networks, and detect(s) one or more second frequency bands of one or more non-cellular networks. The controller selects one of the first frequency bands and one of the second frequency bands, which do not overlap, and assigns the selected first frequency band to one of the wireless transceivers, thereby enabling one of the wireless transceivers to camp on a cell on the selected first frequency band. Also, the controller assigns the selected second frequency band to one of the wireless transceivers, thereby enabling one of the wireless transceivers to connect to one of the non-cellular networks on the selected second frequency band.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: September 21, 2021
    Assignee: MEDIATEK INC.
    Inventors: Wei-Lun Liu, Sheng-Kai Chang, I-Ching Hsieh, Yen-Chih Yang, Teng-Wei Huang, Tzu-Shiang Hsu, Tzu-Yu Lee, Tsung-Yueh Chiang
  • Patent number: 11076450
    Abstract: The invention provides method and associated user equipment for improving versatility of a cellular network in a network system. The network system may have a packet core which may include a security gateway for facilitating an unlicensed network to interwork with the packet core. The method may include: by a user equipment, accessing a multimedia subsystem via the security gateway over the cellular network, instead of the unlicensed network.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: July 27, 2021
    Assignee: MEDIATEK INC.
    Inventors: Sheng-Kai Chang, Po-Yu Liang, Jen-Chih Chang
  • Publication number: 20210173305
    Abstract: A coating system includes supporting pins, a suction plane, and a calibrating disk. The suction plane is located between the supporting pins, and the calibrating disk is configured to dispose on the supporting pins or the suction plane. The calibrating disk includes a round top surface and a round bottom surface being opposite to the round top surface. The round bottom surface has a round plane and a dependable wall surrounding the round plane, and an edge of the round plane and an edge of the round bottom surface are concentric. The dependable wall is configured to limited horizontal movement of the supporting pins, and the round plane is configured to cover the suction plane. A calibration method of the coating system is also provided.
    Type: Application
    Filed: December 9, 2019
    Publication date: June 10, 2021
    Inventor: Sheng-Kai CHANG
  • Publication number: 20210153118
    Abstract: A hardware management method includes: checking an application on an electronic device to categorize a scenario of the application into a pre-defined application scenario, and during a period in which the application is running on the electronic device, managing a hardware component of the electronic device in response to the pre-defined application scenario. For example, the hardware component may be a modulator-demodulator (modem).
    Type: Application
    Filed: April 30, 2020
    Publication date: May 20, 2021
    Inventors: Wang-Hsin Kuo, Sheng-Kai Chang
  • Publication number: 20200389937
    Abstract: The wireless communication device includes one or more wireless transceivers and a controller. The one or more wireless transceivers detect(s) one or more first frequency bands of one or more cellular networks, and detect(s) one or more second frequency bands of one or more non-cellular networks. The controller selects one of the first frequency bands and one of the second frequency bands, which do not overlap, and assigns the selected first frequency band to one of the wireless transceivers, thereby enabling one of the wireless transceivers to camp on a cell on the selected first frequency band. Also, the controller assigns the selected second frequency band to one of the wireless transceivers, thereby enabling one of the wireless transceivers to connect to one of the non-cellular networks on the selected second frequency band.
    Type: Application
    Filed: February 24, 2020
    Publication date: December 10, 2020
    Inventors: Wei-Lun LIU, Sheng-Kai CHANG, I-Ching HSIEH, Yen-Chih YANG, Teng-Wei HUANG, Tzu-Shiang HSU, Tzu-Yu LEE, Tsung-Yueh CHIANG
  • Publication number: 20200252793
    Abstract: The invention provides method and associated user equipment for improving versatility of a cellular network in a network system. The network system may have a packet core which may include a security gateway for facilitating an unlicensed network to interwork with the packet core. The method may include: by a user equipment, accessing a multimedia subsystem via the security gateway over the cellular network, instead of the unlicensed network.
    Type: Application
    Filed: June 10, 2019
    Publication date: August 6, 2020
    Inventors: Sheng-Kai CHANG, Po-Yu LIANG, Jen-Chih CHANG
  • Publication number: 20200100153
    Abstract: A communications apparatus communicating with at least one cellular network includes a radio transceiver and a processor. The radio transceiver is capable of transmitting or receiving wireless radio frequency signals to or from an air interface in the cellular network. The processor is configured to determine whether an inter-RAT change will be triggered in a subsequent procedure when the communications apparatus is in a connected mode. When the processor determines that an inter-RAT change procedure will be triggered, the processor is configured to selectively perform a predetermined procedure instead of the subsequent procedure to avoid the inter-RAT change.
    Type: Application
    Filed: July 17, 2019
    Publication date: March 26, 2020
    Inventors: Guan-Jie HUANG, Tzu-Wen CHANG, Kuan-Wei CHEN, Yu-Hua HUANG, Teng MA, Sheng-Kai CHANG
  • Patent number: 10288890
    Abstract: A system for removably attaching a portable display to a headpiece is described that includes an attachment device configured to receive the portable display. The attachment device includes a mounting base configured to mount to a longitudinal frame member of the headpiece. The mounting base includes a receptacle for receiving a mounting protrusion of the portable display. The attachment device further includes one or more opposing hooks connected to the mounting base. The hooks are configured to receive opposing ends of an elastic band when the elastic band is connected between the hooks and around the longitudinal frame member.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: May 14, 2019
    Assignee: Garmin Switzerland GmbH
    Inventors: David F. Lammers-Meis, Sheng-Kai Chang, Ssu-Chieh Yu
  • Patent number: 9968007
    Abstract: A rack assembly includes a rack body and a jet generating device. The rack body is configured to hold a plurality of servers that are displaced from each other by a passageway. The jet generating device is disposed in the passageway and includes a partition wall, a proximal barrier, and a distal barrier. The partition wall is disposed to define an inflow path and an outflow path. When cooling air is drawn into the inflow path, the cooling air is blocked by the distal barrier such that the cooling air is forced to flow into the outflow path through internal ports of the partition wall to generate a plurality of cooling air jets, which impinge on and cool one of the servers.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: May 8, 2018
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Yao-Hsien Liu, Sheng-Kai Chang
  • Publication number: 20170184861
    Abstract: A system for removably attaching a portable display to a headpiece is described that includes an attachment device configured to receive the portable display. The attachment device includes a mounting base configured to mount to a longitudinal frame member of the headpiece. The mounting base includes a receptacle for receiving a mounting protrusion of the portable display. The attachment device further includes one or more opposing hooks connected to the mounting base. The hooks are configured to receive opposing ends of an elastic band when the elastic band is connected between the hooks and around the longitudinal frame member.
    Type: Application
    Filed: November 2, 2016
    Publication date: June 29, 2017
    Inventors: David F. Lammers-Meis, Sheng-Kai Chang, Ssu-Chieh Yu
  • Publication number: 20170142866
    Abstract: A rack assembly includes a rack body and a jet generating device. The rack body is configured to hold a plurality of servers that are displaced from each other by a passageway. The jet generating device is disposed in the passageway and includes a partition wall, a proximal barrier, and a distal barrier. The partition wall is disposed to define an inflow path and an outflow path. When cooling air is drawn into the inflow path, the cooling air is blocked by the distal barrier such that the cooling air is forced to flow into the outflow path through internal ports of the partition wall to generate a plurality of cooling air jets, which impinge on and cool one of the servers.
    Type: Application
    Filed: February 23, 2016
    Publication date: May 18, 2017
    Inventors: Yao-Hsien LIU, Sheng-Kai CHANG