Patents by Inventor Jian-Feng Chen

Jian-Feng Chen 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: 11070191
    Abstract: The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal. Each of the tines has formed on one or both of opposing sides thereof a vertically protruding line structure laterally elongated in the horizontal lengthwise direction. The quartz crystal device further comprises a first electrode and a second electrode formed on the one or both of the opposing sides of each of the tines and configured such that, when an electrical bias is applied between the first and second electrodes, the fork-shaped quartz crystal vibrates in a torsional mode in which each of the tines twists about a respective axis extending in the horizontal lengthwise direction.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: July 20, 2021
    Assignee: Statek Corporation
    Inventors: Yue Fang, Jian Feng Chen
  • Patent number: 11070192
    Abstract: The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal, wherein each of the tines has formed on one or both of opposing sides thereof a pair of vertically recessed groove structures laterally elongated in the horizontal lengthwise direction, wherein the pair of groove structures are separated in a horizontal widthwise direction by a line structure.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: July 20, 2021
    Assignee: Statek Corporation
    Inventors: Yue Fang, Jian Feng Chen
  • Publication number: 20210058064
    Abstract: The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal, wherein each of the tines has formed on one or both of opposing sides thereof a pair of vertically recessed groove structures laterally elongated in the horizontal lengthwise direction, wherein the pair of groove structures are separated in a horizontal widthwise direction by a line structure.
    Type: Application
    Filed: August 21, 2020
    Publication date: February 25, 2021
    Inventors: Yue Fang, Jian Feng Chen
  • Publication number: 20210058063
    Abstract: The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal. Each of the tines has formed on one or both of opposing sides thereof a vertically protruding line structure laterally elongated in the horizontal lengthwise direction. The quartz crystal device further comprises a first electrode and a second electrode formed on the one or both of the opposing sides of each of the tines and configured such that, when an electrical bias is applied between the first and second electrodes, the fork-shaped quartz crystal vibrates in a torsional mode in which each of the tines twists about a respective axis extending in the horizontal lengthwise direction.
    Type: Application
    Filed: August 22, 2019
    Publication date: February 25, 2021
    Inventors: Yue Fang, Jian Feng Chen
  • Patent number: 10206171
    Abstract: Methods and systems for scheduling wake/sleep cycles by a central device in a wireless network that have at least one mobile device include determining a system reference cycle as a minimum value of a delay constraint on a real-time service for each mobile device of the at least one mobile device that has a real-time service. A wake/sleep cycle length is attributed to each mobile device. The wake/sleep cycle length is an integer multiple of the system reference cycle such that a wake/sleep cycle length of a first mobile device is different from that of a second mobile device. A sleep period and a wake period are assigned within the wake/sleep cycle of each mobile device. The wake/sleep cycle of each mobile device is arranged to avoid collision of the wake period with those of other mobile devices.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: February 12, 2019
    Assignee: INTERDIGITAL CE PATENT HOLDINGS
    Inventors: Ning Liao, Jian Feng Chen, Xiao Jun Ma
  • Patent number: 9686570
    Abstract: It is provided a method for synchronizing content playback at the presentation level, wherein, a first content is presented on a first device and a second content that is the same as or correlated with the first content is presented on a second device. The method comprises steps of receiving status messages from the first device and the second device, wherein the status messages comprise information about playback positions of the first content and the second content currently being playbacked at the presentation level of the first device and the second device; and in response to differences between playback positions of the first content and the second content comprised in the status messages being above a threshold value, performing adjustment to maintain difference of playback positions of the first content and the second content at the presentation level of the first device and the second device below the threshold value.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: June 20, 2017
    Assignee: THOMSON LICENSING
    Inventors: Jian Feng Chen, Xiao Jun Ma
  • Publication number: 20170019854
    Abstract: Methods and systems for scheduling wake/sleep cycles by a central device in a wireless network that have at least one mobile device include determining a system reference cycle as a minimum value of a delay constraint on a real-time service for each mobile device of the at least one mobile device that has a real-time service. A wake/sleep cycle length is attributed to each mobile device. The wake/sleep cycle length is an integer multiple of the system reference cycle such that a wake/sleep cycle length of a first mobile device is different from that of a second mobile device. A sleep period and a wake period are assigned within the wake/sleep cycle of each mobile device. The wake/sleep cycle of each mobile device is arranged to avoid collision of the wake period with those of other mobile devices.
    Type: Application
    Filed: September 30, 2016
    Publication date: January 19, 2017
    Inventors: Ning Liao, Jian Feng Chen, Xiao Jun Ma
  • Patent number: 9497704
    Abstract: A method for scheduling wake/sleep cycles by a central device in a wireless network is provided. The wireless network comprises at least one mobile device. The method comprises: attributing a wake/sleep cycle length to each mobile device, wherein the wake/sleep cycle length is an integer multiple of a system schedule cycle; assigning a sleep period and a wake period within the wake/sleep cycle of each mobile device; and arranging the wake/sleep cycle of each mobile device to avoid collision of the wake period with those of other mobile devices. The present invention can keep the maximum sleep cycle period of each MS to guarantee the QoS requirement and to efficiently utilize the system bandwidth.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: November 15, 2016
    Assignee: THOMSON LICENSING
    Inventors: Ning Liao, Jian Feng Chen, Xiao Jun Ma
  • Patent number: 9344478
    Abstract: A method and an apparatus for managing content distribution over multiple terminal devices in collaborative media system are provided. In the collaborative media system, a first media data is transmitted over a first channel path to a first media terminal and a second media data relevant to the first media data is transmitted over a second channel to a second media terminal. The method comprises: detecting a quality of the first media data on the first channel path and that of the second media data on the second channel path; upon detection the quality of the first media data being lower than a first predetermined value and that of the second media data being greater than a second predetermined value, transmitting the second media data over the second channel path, instead of the first media data over the first channel path, to the first media terminal (S204).
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: May 17, 2016
    Assignee: Thomson Licensing
    Inventors: Jian Feng Chen, Ning Liao, Xiao Jun Ma
  • Patent number: 9137720
    Abstract: A method of a mobile station receiving data packets from a serving base station via a multicast or broadcast connection in a wireless network is provided for performing a handover from the serving base station to a target base station. The method comprises, at the level of the mobile station, the steps of: upon the detection of the quantity of buffered data packets in the mobile station being lower than a first threshold value, establishing a unicast connection with the serving base station to receive data packets from the serving base station; and upon detection of the level of buffered data packets reaching the predetermined threshold level, performing a handover from the serving base station to the target base station. According to the invention, a seamless handover of a mobile station in a wireless network providing Multicast and Broadcast Service (MBS service) can be achieved to prevent the MBS service interruption during the handover.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: September 15, 2015
    Assignee: Thomson Licensing
    Inventors: Jian Feng Chen, Jun Li, Yun Tao Shi, Ning Liao
  • Patent number: 9026878
    Abstract: A fast retransmission method by introducing the internal node under better channel condition to join the work of retransmission after the destination node sends out the packet loss indication for unicast services. Extended to serve multicast services, a system comprising a plurality of nodes utilizes the farthest node in each branch from the source to transmit an acknowledge signal when packet loss occurs. The system then enables the closest node to the acknowledging node to retransmit the requested packet, thereby improving the target packet hit rate and data integrity with less retransmission steps.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: May 5, 2015
    Assignee: Thomson Licensing
    Inventors: Jian Feng Chen, Zhi Gang Zhang, Yan Feng Zhang, Li Zou
  • Patent number: 8835376
    Abstract: A process for making particles for delivery of drug nanoparticles is disclosed herein. The process comprises the steps of (a) forming a suspension of drug nanoparticles by mixing a precipitant solution with an anti-solvent solution under micro-mixing environment, where the formed nanoparticles have a narrow particle size distribution; (b) providing an excipient to at least one of the precipitant solution, the anti-solvent solution and the suspension of drug nanoparticles, the excipient being selected to maintain said drug nanoparticles in a dispersed state when in liquid form; and (c) drying the suspension of drug nanoparticles containing the excipient therein to remove solvent therefrom, wherein removal of the solvent causes the excipient to solidify and thereby form micro-sized matrix particles, each micro-sized particle being comprised of drug nanoparticles dispersed in a solid matrix of the excipient.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: September 16, 2014
    Assignee: Nanomaterials Technology Pte Ltd
    Inventors: Zhigang Shen, Jimmy Sung Lai Yun, Jun Hu, Nital Arvind Jugade, Jiyao Zhang, Wenhao Chen, Zhe Wang, Lingyan Gao, William Glover, Jian Feng Chen
  • Patent number: 8824268
    Abstract: A wireless transmission scheme for transmitting images utilizing a cross layer method integrated the slice allocation and multiple modulation and coding modes selection without the need of feedback channel. The scheme divides a coded image into isolated coded slices, wherein each slice represents a region of the image and each slice is then modulated using modulation schemes of differing robustness. Data of most interest is received by all receivers, with some receivers receiving more data in areas with good channel conditions.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: September 2, 2014
    Inventor: Jian Feng Chen
  • Patent number: 8694846
    Abstract: The present invention provides a scalable and reliable feedback suppression method for receiving and transmitting data block. The method comprises receiving at least one initial data packet of the data block which is sent by the transmitter to the multicast group of receivers; and sending at least one NAK packet indicating packet loss to the transmitter by at least one receiver of the multicast group, wherein the at least one NAK packet is sent in a single uplink time slot dedicated to said multicast group of receivers, and wherein the NAK packet is identical for all receivers of said multicast group.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: April 8, 2014
    Assignee: Thomson Licensing
    Inventors: Jian Feng Chen, Ning Liao, Jun Li
  • Patent number: 8551295
    Abstract: A reactive distillation apparatus for multistage counter-current rotating bed includes a closed shell, in the center of which a revolving shaft linking each shell section is set, the shaft is provided with two or more rotors in series connection, a feeding inlet, a reflux inlet and an outlet of the gas phase are mounted on the top end face of the shell while a waste liquid outlet and an inlet of the gas phase are set on the bottom end face of the shell, a group of concentric dynamic filler rings with different diameters are installed at intervals along the radial direction, wherein the wall of the dynamic filler rings is holed, and the ring clearance between the dynamic filler rings is configured with static rings fastened on the static disc; a feeding inlet is arranged on the top cover of the shell corresponding to the spray nozzle of raw material liquid; a rotating liquid distributor is arranged on the inner side of the innermost dynamic filler ring of the said lower rotor.
    Type: Grant
    Filed: June 12, 2010
    Date of Patent: October 8, 2013
    Assignee: Beijing University of Chemical Technology
    Inventors: Jian-Feng Chen, Peng-Yuan Zhang, Guang-Wen Chu, Hai-Kui Zou, Wei Wu, Qin Shi
  • Patent number: 8520702
    Abstract: A method for providing a service comprising a plurality of coding layers in a communication network is provided, and wherein each one of said plurality of layers is associated with a unique identifier, the method uses a single message containing necessary information for a receiver to derive all identifiers for several layers within a single service; the method allows to reduce the messages exchange in such a communication system.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: August 27, 2013
    Assignee: Thomson Licensing
    Inventors: Jian Feng Chen, Ning Liao
  • Patent number: 8470609
    Abstract: A versatile drug testing device (a lateral flow diagnostic testing device) includes a flat transparent carrier with a top and a bottom with the carrier having a series of independent parallel grooves formed therein running from adjacent to the top to adjacent to the bottom of the carrier, each groove having a first opening and a second opening above the first opening therein adjacent to the bottom of the carrier, at least one drug test strip installed in one of said grooves with its absorbent pad contiguous to the openings and a cover layer attached to the carrier operable to sealing close each of said grooves whereby the bottom of the device can be immersed in a specimen of “urine”, “body fluid” or “other biological specimen” to wet the pad of the at least one test strip though the ingress of the specimen though the associated openings and the test results on the test strip can be easily viewed through the transparent carrier.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: June 25, 2013
    Inventor: Jian Feng Chen
  • Publication number: 20130124994
    Abstract: It is provided a method for content presentation during trick mode operations, wherein a first content file is associated with a plurality of content items and each content item corresponds to a content segment of the first content file, the method comprises the steps of receiving an instruction for a chosen trick mode operation when a content segment of the first content file is played; and performing the chosen trick mode operation on the content segment of the first content file and meanwhile playing at least one content item among the plurality of content items, wherein, the at least one content item corresponds to the content segment of the first content file and the chosen trick mode operation.
    Type: Application
    Filed: July 20, 2010
    Publication date: May 16, 2013
    Applicant: THOMSON LICENSING
    Inventors: Jian Feng Chen, Xiao Jun Ma
  • Patent number: 8437717
    Abstract: A method for reporting state information is provided. The receiver device receives a service, which is encoded in at least two layers over a communication channel, through a subset of said at least two layers; it measures a channel quality parameter; and in response to the channel quality parameter reaching a predetermined threshold value, it receives the service through a modified subset of the at least two layers as a function of the measured channel quality parameter and transmitting state information of the receiver device. Thus, the signal overhead is reduced.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: May 7, 2013
    Assignee: Thomson Licensing
    Inventors: Jian Feng Chen, Jun Li, Yun Tao Shi, Ning Liao
  • Publication number: 20120320814
    Abstract: A method of a mobile station receiving data packets from a serving base station via a multicast or broadcast connection in a wireless network is provided for performing a handover from the serving base station to a target base station. The method comprises, at the level of the mobile station, the steps of: upon the detection of the quantity of buffered data packets in the mobile station being lower than a first threshold value, establishing a unicast connection with the serving base station to receive data packets from the serving base station; and upon detection of the level of buffered data packets reaching the predetermined threshold level, performing a handover from the serving base station to the target base station. According to the invention, a seamless handover of a mobile station in a wireless network providing Multicast and Broadcast Service (MBS service) can be achieved to prevent the MBS service interruption during the handover.
    Type: Application
    Filed: January 4, 2010
    Publication date: December 20, 2012
    Inventors: Jian Feng Chen, Jun Li, Yun Tao Shi, Ning Liao