Patents by Inventor Da-Shan Shiu

Da-Shan Shiu 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: 20190280535
    Abstract: Techniques and examples pertaining to combined wireless charging and position tracking are described. A method may involve a processor of an apparatus operating in a first mode to effect wireless charging via at least a first coil of a plurality of coils of the apparatus. The method may also involve the processor operating in a second mode to effect position tracking via at least a second coil of the plurality of coils of the apparatus.
    Type: Application
    Filed: March 12, 2018
    Publication date: September 12, 2019
    Inventors: Yungszu Tu, Da-Shan Shiu, Vladimir Alexander Muratov
  • Publication number: 20190049544
    Abstract: Circuits for controlling magnetic-based tracking systems are described. These systems may be used in virtual reality applications, for example to track in real-time the location of one or more body parts. The systems use a beacon emitting mutually orthogonal magnetic fields. On the receiver side, one or more sensors disposed on different parts of a body receive the magnetic fields. The beacon includes switching amplifiers for driving the magnetic field emitters. Being binary, these amplifiers may be controlled by binary signals. The circuits may exhibit a resonant frequency response, and may be operated off-resonance, thus providing for a better control of the magnetic fields amplitude. As a result, however, fluctuations in the envelop of the magnetic fields due to the presence of a beating tone may arise. These fluctuations may be shortened by gradually activating the drivers for the magnetic field emitters.
    Type: Application
    Filed: July 3, 2018
    Publication date: February 14, 2019
    Applicant: MEDIATEK Singapore Pte. Ltd.
    Inventors: Vladimir A. Muratov, Da-shan Shiu, William Plumb, Philip Frank Tustin
  • Publication number: 20190011980
    Abstract: A virtual reality (VR) system including a virtual reality display and a virtual reality host is provided. The virtual reality display is arranged for displaying a virtual environment for a virtual reality user. The virtual reality host is arranged for performing a virtual reality session to generate the virtual environment using the virtual reality display and creating a virtual interface to sync and interact with a source unit, wherein when the source unit receives an incoming event, the virtual reality host receives a notification regarding the incoming event from the source unit and provides the notification to the virtual interface to generate an alert for the notification to the screen of the virtual reality display in the virtual environment for the virtual reality user.
    Type: Application
    Filed: September 13, 2018
    Publication date: January 10, 2019
    Inventors: Da-Shan SHIU, Shih-Jung CHUANG
  • Patent number: 10108256
    Abstract: A virtual reality (VR) system including a virtual reality display and a virtual reality host is provided. The virtual reality display is arranged for displaying a virtual environment for a virtual reality user. The virtual reality host is arranged for performing a virtual reality session to generate the virtual environment using the virtual reality display and creating a virtual interface to sync and interact with a source unit, wherein when the source unit receives an incoming event, the virtual reality host receives a notification regarding the incoming event from the source unit and provides the notification to the virtual interface to generate an alert for the notification to the screen of the virtual reality display in the virtual environment for the virtual reality user.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: October 23, 2018
    Assignee: MEDIATEK INC.
    Inventors: Da-Shan Shiu, Shih-Jung Chuang
  • Patent number: 9791924
    Abstract: A head-mount display (HMD) and variations thereof are described. An HMD may include a mobile device having a display unit, a camera, a light source and a processing unit that controls operations of the display unit, camera and light source. The processing unit receives data associated with one or more optical images captured by the camera, and renders a visual image displayable by the display unit. The HMD may also include an eyewear piece having a holder, one or more lenses and a reflective unit. The holder is wearable by a user and holds the mobile device in front of eyes of the user. The user can view the display unit through the one or more lenses. The reflective unit reflects an image of at least an eye of the user. The camera is oriented to capture the reflected image of the eye through the reflective unit.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: October 17, 2017
    Assignee: MediaTek Inc.
    Inventors: Da-Shan Shiu, Kai-Mau Chang, Tsu-Ming Liu
  • Publication number: 20170241808
    Abstract: A sensor includes a ferromagnetic shield, at least one sensor coil disposed around an exterior of the ferromagnetic shield, and an electronics module within the ferromagnetic shield. The electronics module is configured to determine the position and/or orientation of the sensor based at least in part on a measurement of a signal induced in the at least one sensor coil.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 24, 2017
    Applicant: MediaTek Inc.
    Inventors: Vladimir A. Muratov, Da-shan Shiu
  • Publication number: 20170239560
    Abstract: A wearable sensor apparatus includes a band shaped and sized to be worn on a finger or limb of a user, a plurality of sensor coils configured to detect a magnetic field. A processor configured to calculate a position of the wearable sensor apparatus based upon signals from the plurality of sensor coils, and a communication module configured to transmit the position of the wearable sensor apparatus.
    Type: Application
    Filed: January 12, 2017
    Publication date: August 24, 2017
    Applicant: MediaTek Inc.
    Inventors: Vladimir A. Muratov, Da-shan Shiu, Yungszu Tu
  • Patent number: 9642153
    Abstract: In a communications apparatus first radio module communicates with a first wireless network and provides wireless communication services in compliance with a first RAT. A second radio module communicates with a second wireless network and provides wireless communication services in compliance with a second RAT. At least two antennas are shared by the first radio module and the second radio module. When the first radio module operates in an idle mode and when the timing of the first radio module performing a first receiving activity coincides with the timing of the second radio module performing a second receiving activity, the second radio module uses the antennas to perform the second receiving activity when a DRX cycle duration of the first radio module in the idle mode is shorter than a DRX cycle duration of the second radio module.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: May 2, 2017
    Assignee: MEDIATEK INC.
    Inventors: Ju-Ya Chen, Yu-Chuan Lin, Da-shan Shiu, Yih-Shen Chen, Chia-Hao Yu
  • Publication number: 20160378176
    Abstract: A head-mounted display (HMD) may include a mobile device that includes a display unit, at least one sensing unit and a processing unit. The at least one sensing unit may be configured to detect a presence of an object. The processing unit may be configured to receive data associated with the detecting from the at least one sensing unit, and determine one or more of a position, an orientation and a motion of the object based at least in part on the received data. The HMD may also include an eyewear piece that includes a holder and a field of view (FOV) enhancement unit. The holder may be wearable by a user on a forehead thereof to hold the mobile device in front of eyes of the user. The FOV enhancement unit may be configured to enlarge or redirect a FOV of the at least one sensing unit.
    Type: Application
    Filed: June 24, 2015
    Publication date: December 29, 2016
    Inventors: Da-Shan Shiu, Kai-Mau Chang
  • Patent number: 9504085
    Abstract: A communications apparatus. A first radio module communicates with a first wireless network and provides wireless communications services. A second radio module communicates with a second wireless network and provides wireless communications services. At least two antennas shared by the first radio module and the second radio module. When the first radio module operates in a connected mode and when the timing of the first radio module performing the first receiving activity coincides with the timing of the second radio module performing a second receiving activity, the first radio module reports a value of 1 for a Rank Indicator to the first wireless network at least once before the second radio module is to perform the second receiving activity, and then the second radio module uses one of the antennas to perform the second receiving activity.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: November 22, 2016
    Assignee: MEDIATEK INC.
    Inventors: Ju-Ya Chen, Yu-Chuan Lin, Chia-Hao Yu, Da-shan Shiu, Yih-Shen Chen
  • Publication number: 20160180591
    Abstract: A head-mount display (HMD) and variations thereof are described. An HMD may include a mobile device having a display unit, a camera, a light source and a processing unit that controls operations of the display unit, camera and light source. The processing unit receives data associated with one or more optical images captured by the camera, and renders a visual image displayable by the display unit. The HMD may also include an eyewear piece having a holder, one or more lenses and a reflective unit. The holder is wearable by a user and holds the mobile device in front of eyes of the user. The user can view the display unit through the one or more lenses. The reflective unit reflects an image of at least an eye of the user. The camera is oriented to capture the reflected image of the eye through the reflective unit.
    Type: Application
    Filed: May 13, 2015
    Publication date: June 23, 2016
    Inventors: Da-Shan Shiu, Kai-Mau Chang, Tsu-Ming Liu
  • Publication number: 20160124499
    Abstract: A virtual reality (VR) system including a virtual reality display and a virtual reality host is provided. The virtual reality display is arranged for displaying a virtual environment for a virtual reality user. The virtual reality host is arranged for performing a virtual reality session to generate the virtual environment using the virtual reality display and creating a virtual interface to sync and interact with a source unit, wherein when the source unit receives an incoming event, the virtual reality host receives a notification regarding the incoming event from the source unit and provides the notification to the virtual interface to generate an alert for the notification to the screen of the virtual reality display in the virtual environment for the virtual reality user.
    Type: Application
    Filed: March 13, 2015
    Publication date: May 5, 2016
    Inventors: Da-Shan SHIU, Shih-Jung CHUANG
  • Publication number: 20150257090
    Abstract: A communications apparatus. A first radio module communicates with a first wireless network and provides wireless communications services. A second radio module communicates with a second wireless network and provides wireless communications services. At least two antennas shared by the first radio module and the second radio module. When the first radio module operates in a connected mode and when the timing of the first radio module performing the first receiving activity coincides with the timing of the second radio module performing a second receiving activity, the first radio module reports a value of 1 for a Rank Indicator to the first wireless network at least once before the second radio module is to perform the second receiving activity, and then the second radio module uses one of the antennas to perform the second receiving activity.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 10, 2015
    Applicant: MediaTek Inc.
    Inventors: Ju-Ya CHEN, Yu-Chuan LIN, Chia-Hao YU, Da-shan SHIU, Yih-Shen CHEN
  • Publication number: 20150098376
    Abstract: A communications apparatus. A first radio module communicates with a first wireless network and provides wireless communication services in compliance with a first RAT. A second radio module communicates with a second wireless network and provides wireless communication services in compliance with a second RAT. At least two antennas are shared by the first radio module and the second radio module. When the first radio module operates in an idle mode and when the timing of the first radio module performing a first receiving activity coincides with the timing of the second radio module performing a second receiving activity, the second radio module uses the antennas to perform the second receiving activity when a DRX cycle duration of the first radio module in the idle mode is shorter than a DRX cycle duration of the second radio module.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Applicant: MediaTek Inc.
    Inventors: Ju-Ya CHEN, Yu-Chuan LIN, Da-shan SHIU, Yih-Shen CHEN, Chia-Hao YU
  • Patent number: 8700020
    Abstract: A method and apparatus for determining an operational mode for use in a wireless communication system based on a location, a velocity, or both, of a wireless communication device (WCD) in relation to a wireless network infrastructure is described. The selected mode can be used by various devices within the communication system. Modes that are selected include transmit diversity and site selection diversity.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: April 15, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Da-Shan Shiu, Daisuke Terasawa
  • Patent number: 8565121
    Abstract: Techniques for improved low latency frequency switching are disclosed. In one embodiment, a controller receives a frequency switch command and generates a frequency switch signal at a time determined in accordance with a system timer. In another embodiment, gain calibration is initiated subsequent to the frequency switch signal delayed by the expected frequency synthesizer settling time. In yet another embodiment, DC cancellation control and gain control are iterated to perform gain calibration, with signaling to control the iterations without need for processor intervention. Various other embodiments are also presented. Aspects of the embodiments disclosed may yield the benefit of reducing latency during frequency switching, allowing for increased measurements at alternate frequencies, reduced time spent on alternate frequencies, and the capacity and throughput improvements that follow from minimization of disruption of an active communication session and improved neighbor selection.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: October 22, 2013
    Assignee: QUALCOMM, Incorporated
    Inventors: Da-shan Shiu, Li Zhang, Eugene Sy, David Malonado, Upkar Dhaliwal
  • Patent number: 8514909
    Abstract: Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor identifies an unoccupied code having a spreading factor that is less than a longest spreading factor for the system. A despreader measures symbol energy based on the unoccupied code and a noise estimator generates noise estimations based on the measured symbol energies. The subscriber station uses similar techniques in order to perform channel estimations within a period that is a fraction of a symbol period of a longest-spreading-factor code.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Da-Shan Shiu, Durga Malladi Prasad, Srikrishna Bhashyam
  • Patent number: 8355685
    Abstract: Techniques for segmented CDMA searching are disclosed. In one aspect, a searcher comprises a plurality of storage elements selectable for performing a plurality of segmentable search tasks, each storage element operable for storage of and access to state information for one of the plurality of search tasks. In another aspect, a first search task is interrupted in progress, the state information for the first task is stored, a second search task is performed, and the first search task is continued using the stored state information. In yet another aspect, a search task is segmented into smaller search segments, sized to fit within contiguous available time in the searcher. Various other aspects of the invention are also presented. These aspects have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: January 15, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Subramanya P. Rao, Da-Shan Shiu, Jeremy H. Lin, Jeong Geun Kim
  • Patent number: 8326257
    Abstract: A method and apparatus for determining an operational mode for use in a wireless communication system based on a location, a velocity, or both, of a wireless communication device (WCD) in relation to a wireless network infrastructure is described. The selected mode can be used by various devices within the communication system. Modes that are selected include transmit diversity and site selection diversity.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: December 4, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Da-Shan Shiu, Daisuke Terasawa
  • Patent number: 8135056
    Abstract: Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor identifies an unoccupied code having a spreading factor that is less than a longest spreading factor for the system. A despreader measures symbol energy based on the unoccupied code and a noise estimator generates noise estimations based on the measured symbol energies. The subscriber station uses similar techniques in order to perform channel estimations within a period that is a fraction of a symbol period of a longest-spreading-factor code.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: March 13, 2012
    Assignee: Qualcomm Incorporated
    Inventors: Da-shan Shiu, Durga Prasad Malladi, Srikrishna Bhashyam