Patents by Inventor Chun-An Shen

Chun-An Shen 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: 9800205
    Abstract: A power amplifier circuit including a power transistor, a variable impedance circuit, first and second envelope detecting circuits is provided. The power transistor receives an input signal and outputs an output signal. The variable impedance circuit includes an impedance control transistor and a first filter capacitor. An equivalent impedance of the variable impedance circuit varies with the input signal. The impedance control transistor is coupled to the power transistor and receives a control voltage. The first filter capacitor is coupled between the impedance control transistor and ground. Both the first and the second envelope detecting circuits detect the input signal to dynamically control the equivalent impedance of the variable impedance circuit.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: October 24, 2017
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Wei-Tsung Li, Shih-Ming Wang, Chih-Chun Shen
  • Patent number: 9773294
    Abstract: A graphics processing system includes a decision logic and a varying buffer control circuit. The decision logic sets a control signal by checking at least one criterion, wherein the at least one criterion includes a first criterion, and a checking result of the first criterion depends on a size of a primitive. The varying buffer control circuit refers to the control signal to determine whether to store varying variables of the primitive into a varying buffer.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: September 26, 2017
    Assignee: MEDIATEK INC.
    Inventors: Chun-Shen Liu, Ming-Hao Liao, Hung-Wei Wu
  • Publication number: 20170163216
    Abstract: A power amplifier circuit including a power transistor, a variable impedance circuit, first and second envelope detecting circuits is provided. The power transistor receives an input signal and outputs an output signal. The variable impedance circuit includes an impedance control transistor and a first filter capacitor. An equivalent impedance of the variable impedance circuit varies with the input signal. The impedance control transistor is coupled to the power transistor and receives a control voltage. The first filter capacitor is coupled between the impedance control transistor and ground. Both the first and the second envelope detecting circuits detect the input signal to dynamically control the equivalent impedance of the variable impedance circuit.
    Type: Application
    Filed: December 1, 2016
    Publication date: June 8, 2017
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Wei-Tsung LI, Shih-Ming WANG, Chih-Chun SHEN
  • Publication number: 20160379336
    Abstract: A method of a graphics-processing unit (GPU) for tile-based rendering of a display area and a graphics-processing apparatus are provided. The method includes the steps of computing vertex positions of a plurality of vertexes, wherein the first vertex corresponds to a first thread and the second vertex corresponds to a second thread; determining whether a thread merge condition is satisfied; merging the first thread and the second thread to a thread group when determining that the thread merge condition is satisfied; computing vertex varyings of the plurality of vertexes, wherein when the first thread and the second thread are merged to the thread group, a varying of the first vertex and a varying of the second vertex are computed with respect to a program counter.
    Type: Application
    Filed: March 18, 2016
    Publication date: December 29, 2016
    Inventors: Pei-Kuei TSUNG, Sung-Fang TSAI, Ming-Hao LIAO, Yang-Yao LIN, Ken-Fu LIANG, Chun-Shen LIU
  • Patent number: 9489085
    Abstract: The present invention discloses an optical touch panel system and a positioning method for positioning an object existing in a touch control area. The system includes: at least one reflective element disposed on a side of the touch control area; at least one light guide module disposed on a side of the touch control area adjacent to or opposite the reflective element and emitting light; an image sensor capturing an image of the object; a plurality of photo detectors arranged on a side of the touch control area adjacent to the image sensor and sensing the object to obtain shade information; and a processor calculating the coordinates of the object according to the image and the shade information.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: November 8, 2016
    Assignee: PIXART IMAGING INCORPORATION, R.O.C.
    Inventors: Chun-Shen Lin, Chun-Yi Lu, Chi-Chieh Liao, Tzung-Min Su, Ming-Tsan Kao
  • Publication number: 20160264020
    Abstract: An exemplary creep torque selection method includes selecting an amount of reverse creep torque for a vehicle. The selecting is independent from an amount of forward creep torque for the vehicle.
    Type: Application
    Filed: March 9, 2015
    Publication date: September 15, 2016
    Inventors: Christopher Adam Ochocinski, Joseph F. Stanek, Matthew Fleming, Stephen Li-Chun Shen, Robert David Hancasky
  • Patent number: 9429084
    Abstract: Systems and methods for increasing hybrid driveline efficiency are disclosed. In one example, an efficient engine operating region is defined within an engine operating domain based on an engine's brake specific fuel consumption. The systems and methods may increase an amount of time a hybrid driveline operates at more efficient operating conditions.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: August 30, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Douglas Raymond Martin, Kenneth James Miller, Stephen Li-Chun Shen
  • Publication number: 20160243958
    Abstract: A hybrid vehicle includes a fraction battery, a powertrain coupled to the battery, and a controller or a battery management system having a controller. The controller is programmed to set a state of charge (SOC) target for the battery according to losses associated with the powertrain and an angle of inclination of the vehicle. The controller is programmed to respond to a SOC of the battery and a speed of the vehicle. When the SOC is greater than the target and the speed is greater than a threshold the controller is programmed to discharge the battery to achieve the target.
    Type: Application
    Filed: February 23, 2015
    Publication date: August 25, 2016
    Inventors: Kenneth James Miller, Douglas Raymond Martin, William Paul Perkins, Stephen Li-Chun Shen
  • Publication number: 20160230087
    Abstract: The present invention relates to a method for fabricating a phosphor having a maximum absorption wavelength between 410 nm and 470 nm and having no rare earth elements therein and a method for generating a white light by using the phosphor having a maximum absorption wavelength between 410 nm and 470 nm and having no rare earth elements therein, and particularly relates to a method for fabricating manganese-doped zinc selenide nanoparticles, which can emit a yellow-orange light having a wavelength of 500 nm-700 nm, and a method for generating a white light by using the manganese-doped zinc selenide nanoparticles, which can emit a yellow-orange light having a wavelength of 500 nm-700 nm.
    Type: Application
    Filed: May 19, 2015
    Publication date: August 11, 2016
    Inventors: CHING-FUH LIN, Pin-Chun SHEN, CHIEH-NAN TSENG, KUAN-YU CHEN, JHIH-SIANG YANG
  • Publication number: 20160061121
    Abstract: Systems and methods for increasing hybrid driveline efficiency are disclosed. In one example, an efficient engine operating region is defined within an engine operating domain based on an engine's brake specific fuel consumption. The systems and methods may increase an amount of time a hybrid driveline operates at more efficient operating conditions.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 3, 2016
    Inventors: Douglas Raymond Martin, Kenneth James Miller, Stephen Li-Chun Shen
  • Publication number: 20160043609
    Abstract: The present invention provides a motor with differential matching gear. This motor comprises a stator, a rotor, an externally inner gear, an internally outer gear, an output shaft, and a motor housing. The stator produces magnetic lines of force, causing the rotor to rotate at a first revolving speed. The rotor has an asymmetric wall thickness. The externally inner gear has a plurality of inner teeth. The rotor dynamically changes the axle center of the externally inner gear by moving it when rotating. The internally outer gear has a plurality of outer teeth. The inner teeth partially mesh the outer teeth when the externally inner gear rotates; and the axle center of the internally outer gear remains unchanged when the internally outer gear rotates. The output shaft is driven by the internally outer gear so that it rotates at a second revolving speed less than the first revolving speed.
    Type: Application
    Filed: December 31, 2014
    Publication date: February 11, 2016
    Inventor: Chun-Shen YEH
  • Publication number: 20160005143
    Abstract: A graphics processing system includes a decision logic and a varying buffer control circuit. The decision logic sets a control signal by checking at least one criterion, wherein the at least one criterion includes a first criterion, and a checking result of the first criterion depends on a size of a primitive. The varying buffer control circuit refers to the control signal to determine whether to store varying variables of the primitive into a varying buffer.
    Type: Application
    Filed: April 7, 2015
    Publication date: January 7, 2016
    Inventors: Chun-Shen Liu, Ming-Hao Liao, Hung-Wei Wu
  • Publication number: 20150348528
    Abstract: A manual tubular bell structure is provided, which can be used conveniently and set with different audio frequencies. The manual tubular bell structure includes a pipe provided with a striker seat, a striker, and a striker head. The pipe has an audio frequency setting trough and a handle sleeve. The handle sleeve has an audio frequency setting hole. The audio frequency setting trough can be in different lengths/widths to set different audio frequencies. The audio frequency setting hole of the handle sleeve can be in different diameters to set different audio frequencies. The manual tubular bell of the present invention can provide different frequencies for people to perform.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 3, 2015
    Inventor: CHUN-SHEN YANG
  • Publication number: 20150247539
    Abstract: A bearings coordination mechanism comprises a first ring-shaped body, a flange and a second ring-shaped body. The first ring-shaped body forms a first accommodating space. The flange forms a second accommodating space and disposed in the first accommodating space. The second ring-shaped body is disposed in the second accommodating space. The outer side of the flange is coupled with an inner side of the first ring-shaped body in a single direction to form a first one-way bearing and an inner side of the flange is coupled with an outer side of the second ring-shaped body in the single direction to form a second one-way bearing. The structure of the present invention is capable to execute modes of operation in forward or backward direction. Moreover, the present invention further provides a bearings coordination system for executing forward and backward operation modes simultaneously.
    Type: Application
    Filed: July 30, 2014
    Publication date: September 3, 2015
    Inventor: Chun-Shen YEH
  • Publication number: 20150246710
    Abstract: The invention provides a power module of an electric bicycle comprising a first power unit, a reduction unit, a second power unit, and a driving unit. The first power unit outputs a first horsepower with a first rotating speed and a first torque. The reduction unit decreases the first rotating speed to a second rotating speed, and the first torque is increased to a second torque. The reduction unit outputs a second horsepower. The second power unit outputs a third horsepower. The driving unit is coupled with the reduction unit and the second power unit for outputting either the second horsepower or the third horsepower. The power module has the advantages of low speed, high torque, small size, and low cost.
    Type: Application
    Filed: September 8, 2014
    Publication date: September 3, 2015
    Inventor: Chun-Shen YEH
  • Publication number: 20150247563
    Abstract: The invention provides a high torque power module comprised a power unit and a reduction unit. The power unit outputs a first horsepower with a first rotating speed and a first torque. The reduction unit decreases the first rotating speed to a second rotating speed, and the first torque is increased to a second torque. The reduction unit outputs a second horsepower. The present invention converts a power with high rotating speed and low torque to a power with low rotating speed and high torque by the reduction unit. The high torque power module has the advantages of low rotating speed, high torque, small size, and low cost.
    Type: Application
    Filed: September 4, 2014
    Publication date: September 3, 2015
    Inventor: Chun-Shen YEH
  • Publication number: 20150036316
    Abstract: The present invention relates to a white light-emitting diode with high uniformity and wide angle intensity distribution, and particularly relates to a color temperature tunable white light-emitting diode with high uniformity and wide angle intensity distribution. A nano-phosphor material is coated on one surface of a lampshade of the white light-emitting diode to form a white light phosphor layer for providing a stable white light with high uniformity, wide angle intensity distribution, and good illuminance. Furthermore, the color temperature of the white light-emitting diode can be adjusted by changing the ratio of compositions of white light phosphor layer.
    Type: Application
    Filed: October 19, 2013
    Publication date: February 5, 2015
    Applicant: National Taiwan University
    Inventors: CHING-FUH LIN, Pin-Chun SHEN
  • Patent number: 8901514
    Abstract: System, including methods and apparatus, for sample analysis using at least one array of spotlights to illuminate a microplate with excitation light for photoluminescence emission.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: December 2, 2014
    Assignee: Molecular Devices, LLC
    Inventor: Chun-Shen Lee
  • Patent number: 8869651
    Abstract: A harmonic reducer with clutch function includes a circular spline, a mounting base, a flexspline and a wave generator. When a power source drives the wave generator to rotate in a first direction, a one-way clutch engages to lock the mounting base so as to deform the flexspline and hence rotate the circular spline in the first direction. When an external force is applied to the output shaft in the first direction, the mounting base is driven by the flexspline so the one-way clutch disposed thereon is disengaged by a force in a second direction. At this moment, the rotation speed of the wave generator is equal to zero relative to the flexspline, so the wave generator can be driven by the circular spline to rotate along with the flexspline, and the central axel of the wave generator can be driven to rotate as well.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: October 28, 2014
    Inventor: Chun-Shen Yeh
  • Publication number: 20140302253
    Abstract: The present invention relates to a method for fabricating metal-ion-doped zinc sulfide nanoparticle and a method for generating a warm white light by using the metal-ion-doped zinc sulfide nanoparticle, and particularly relates to a method for fabricating manganese-doped zinc sulfide nanoparticle, which can emit a red light having a wavelength of 600 nm-650 nm, and a method for generating a warm white light by using the manganese-doped zinc sulfide nanoparticle to form a warm white light emission phosphor film.
    Type: Application
    Filed: July 9, 2013
    Publication date: October 9, 2014
    Inventors: CHING-FUH LIN, Pin-Chun SHEN