Patents by Inventor Jan Chen

Jan 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).

  • Publication number: 20220271661
    Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit is configured to generate an output signal according to an input signal and a control signal. The ramp generator circuit is configured to generate a ramp signal according to the control signal, the input signal, and the output signal. The control circuit is configured to generate the control signal according to the output signal, a reference signal, and the ramp signal.
    Type: Application
    Filed: December 29, 2021
    Publication date: August 25, 2022
    Inventors: Chieh-Ju TSAI, Ching-Jan CHEN, Zhen-Guo DING, Zhe-Hui LIN, Wei-Ling CHEN
  • Publication number: 20220271662
    Abstract: A power stage circuit generates an output signal according to an input signal and a control signal. A ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. A calculation circuit generates a calculation signal according to the output signal and a reference signal. The calculation circuit operates in a first mode when the power converter operates in a light loading state, and the calculation circuit operates in a second mode when the power converter operates in a normal state. A control circuit generates the control signal according to the calculation signal and the ramp signal. The control circuit includes a comparator circuit and a control signal generator. The comparator circuit generates a comparison signal according to the calculation signal and the ramp signal. The control signal generator generates the control signal according to the comparison signal.
    Type: Application
    Filed: December 30, 2021
    Publication date: August 25, 2022
    Inventors: Chieh-Ju TSAI, Ching-Jan CHEN, Zhen-Guo DING, Zhe-Hui LIN, Wei-Ling CHEN
  • Patent number: 11411571
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: August 9, 2022
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
  • Publication number: 20220244486
    Abstract: A lens driving module is configured to provide an imaging lens system with auto-focus functionality. The imaging lens system is disposed between a preloading element and a driving base of the lens driving module. The preloading element includes an injection molded part and a ferromagnetic part partially embedded in the injection molded part. A rollable element is disposed in each of mounting structures of the injection molded part and in contact with a displaceable lens carrier of the imaging lens system. The ferromagnetic part and a magnet disposed on the displaceable lens carrier together generate a magnetic attraction force, such that the displaceable lens carrier exerts a preloading force on the rollable element. The driving base includes a driving coil and an electrical wiring pattern. The driving coil corresponds to the magnet for generating a driving force to drive the displaceable lens carrier to move along the optical axis.
    Type: Application
    Filed: April 23, 2021
    Publication date: August 4, 2022
    Applicant: LARGAN DIGITAL CO.,LTD.
    Inventors: Hao Jan CHEN, Yu Chen LAI, Ming-Ta CHOU, Te-Sheng TSENG
  • Publication number: 20220239835
    Abstract: A reflection module capable of image stabilization includes a reflecting element, a rotatable holder, a fixed base, a spherical supporting structure, an auxiliary supporting structure and an image stabilizing actuator. The reflecting element having a reflecting surface for folding optical path of incident light is disposed on the rotatable holder. The fixed base is connected to the rotatable holder via an elastic element. The spherical supporting structure is disposed between the rotatable holder and the fixed base. The auxiliary supporting structure disposed on at least one of the rotatable holder and the fixed base and corresponds to the spherical supporting structure. At least part of the image stabilizing actuator is disposed on the rotatable holder for driving the rotatable holder to rotate by taking the spherical supporting structure as rotation center. The spherical supporting structure is a ball having at least three contact points with the auxiliary supporting structure.
    Type: Application
    Filed: April 18, 2022
    Publication date: July 28, 2022
    Applicant: LARGAN DIGITAL CO.,LTD.
    Inventors: Lin An CHANG, Hao Jan CHEN, Ming-Ta CHOU, Chen-Yi HUANG
  • Patent number: 11336828
    Abstract: A reflection module capable of image stabilization includes a reflecting element, a rotatable holder, a fixed base, a spherical supporting structure, an auxiliary supporting structure and an image stabilizing actuator. The reflecting element having a reflecting surface for folding optical path of incident light is disposed on the rotatable holder. The fixed base is connected to the rotatable holder via an elastic element. The spherical supporting structure is disposed between the rotatable holder and the fixed base. The auxiliary supporting structure disposed on at least one of the rotatable holder and the fixed base and corresponds to the spherical supporting structure. At least part of the image stabilizing actuator is disposed on the rotatable holder for driving the rotatable holder to rotate by taking the spherical supporting structure as rotation center. The spherical supporting structure is a ball having at least three contact points with the auxiliary supporting structure.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 17, 2022
    Assignee: LARGAN DIGITAL CO., LTD.
    Inventors: Lin An Chang, Hao Jan Chen, Ming-Ta Chou, Chen-Yi Huang
  • Publication number: 20220113492
    Abstract: An imaging lens driving module includes a lens carrier, a molded receiving base, a rolling element, a molded frame element and a driving mechanism. The lens carrier defines an optical axis. The molded receiving base is configured to receive the lens carrier. The rolling element is disposed between the lens carrier and the molded receiving base, and the lens carrier is allowed to be displaceable along the optical axis and relatively to the molded receiving base. The molded frame element is coupled with the molded receiving base for defining an inner space to receive the lens carrier. The driving mechanism drives the lens carrier displaceable along the optical axis, and includes a driving magnet and a driving coil, wherein the driving magnet is disposed on the lens carrier, the driving coil is corresponding to and faces towards the driving magnet.
    Type: Application
    Filed: August 26, 2021
    Publication date: April 14, 2022
    Inventors: Hao-Jan CHEN, Heng-Yi SU, Ming-Ta CHOU, Chen-Yi HUANG, Ming-Shun CHANG
  • Publication number: 20220030168
    Abstract: A reflection module capable of image stabilization includes a reflecting element, a rotatable holder, a fixed base, a spherical supporting structure, an auxiliary supporting structure and an image stabilizing actuator. The reflecting element having a reflecting surface for folding optical path of incident light is disposed on the rotatable holder. The fixed base is connected to the rotatable holder via an elastic element. The spherical supporting structure is disposed between the rotatable holder and the fixed base. The auxiliary supporting structure disposed on at least one of the rotatable holder and the fixed base and corresponds to the spherical supporting structure. At least part of the image stabilizing actuator is disposed on the rotatable holder for driving the rotatable holder to rotate by taking the spherical supporting structure as rotation center. The spherical supporting structure is a ball having at least three contact points with the auxiliary supporting structure.
    Type: Application
    Filed: September 30, 2020
    Publication date: January 27, 2022
    Applicant: LARGAN DIGITAL CO.,LTD.
    Inventors: Lin An CHANG, Hao Jan CHEN, Ming-Ta CHOU, Chen-Yi HUANG
  • Publication number: 20210396949
    Abstract: Provided is a lens assembly driving module including a photographing lens assembly, a first driving mechanism and a second driving mechanism. The photographing lens assembly includes N lens elements and has an optical axis passing through the N lens elements. The first driving mechanism drives at least N/2 said lens elements to move along the optical axis of the photographing lens assembly. The second driving mechanism enables a relative distance along the optical axis of two adjacent ones of the N lens elements to vary. Therefore, any specific one of the lens elements is capable of being driven to optimize optical imaging resolution of various fields of view independently within a real shot at different object distances.
    Type: Application
    Filed: September 21, 2020
    Publication date: December 23, 2021
    Inventors: Heng-Yi SU, Hao-Jan CHEN, Ming-Ta CHOU, Te-Sheng TSENG
  • Publication number: 20210281268
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Application
    Filed: May 26, 2021
    Publication date: September 9, 2021
    Inventors: Sandeep Kumar GOEL, Ji-Jan CHEN, Stanley JOHN, Yun-Han LEE, Yen-Hao HUANG
  • Patent number: 11025261
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: June 1, 2021
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
  • Publication number: 20200304133
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Application
    Filed: June 5, 2020
    Publication date: September 24, 2020
    Inventors: Sandeep Kumar GOEL, Ji-Jan CHEN, Stanley JOHN, Yun-Han LEE, Yen-Hao HUANG
  • Patent number: 10680627
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: June 9, 2020
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
  • Patent number: 10581319
    Abstract: The present invention provides a LLC resonant converter with magnetic-flux balance control circuit. The LLC resonant converter comprises a primary-side circuit and a secondary-side circuit, wherein the control loop of secondary-side circuit comprises a voltage control unit, a digital pulse-width-modulation generation unit, and the control loop of primary-side circuit comprises a DC detection unit, a balance control unit, a digital pulse-width-modulation generation unit.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: March 3, 2020
    Assignee: NATIONAL TAIWAN UNIVERSITY
    Inventors: Yuan-Chih Lin, Ching-Jan Chen
  • Publication number: 20190386540
    Abstract: An alternator apparatus and a voltage converter thereof are provided. The voltage converter includes a voltage converting circuit and an auxiliary circuit. The voltage converting circuit has a first power end, a second power end and an inductor. The voltage converting circuit converts a first voltage on the first power end to generate a second voltage on the second power end during an operation time period, or the voltage converting circuit converts the second voltage on the second power end to generate the first voltage on the first power end during the operation time period. The auxiliary circuit forms a first loop between the first power end and the inductor during a reset time period, or forms a second loop between the second power end and the inductor during the reset time period, or forms a third loop in the auxiliary circuit.
    Type: Application
    Filed: September 17, 2018
    Publication date: December 19, 2019
    Applicant: ACTRON TECHNOLOGY CORPORATION
    Inventors: Chia-Sung Yu, Ching-Jan Chen, Yuan-Chih Lin
  • Publication number: 20190229737
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 25, 2019
    Inventors: Sandeep Kumar GOEL, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
  • Patent number: 10286527
    Abstract: A hexagonal wrench includes a body with at least one function end which is a twisted and equal-sided column. The twisted and equal-sided column includes a root section, an end section and a middle section which formed between the root section and the end section. A maximum twist angle is defined between the root section and the end section, and the maximum twist angle is equal to or less than 30 degrees. The root section has a first cross section and the end section has a second cross section. The first cross section is larger than second cross section.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: May 14, 2019
    Inventor: Joun-Jan Chen
  • Patent number: 10256828
    Abstract: A clock distribution circuit configured to output a clock signal includes a first circuit configured to use a reference clock signal to provide first and second reference signals, wherein the second reference signal indicates whether the first reference signal is locked with the reference clock signal; a second circuit configured to use the reference clock signal to provide an output signal and an indication signal indicative whether the output signal is locked with the reference clock signal; and a monitor circuit, coupled to the first and second circuits, and configured to use at least one of the first reference signal, the second reference signal, the output signal, and the indication signal to determine whether the second circuit is functioning correctly.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: April 9, 2019
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
  • Patent number: 10156609
    Abstract: A device includes a fault generation circuit and a first fault injection circuit. The fault generation circuit is configured to generate a fault signal and a plurality of control signals according to a mode signal. The first fault injection circuit is configured to inject a first final fault signal to an under-test device based on the fault signal and the plurality of control signals, in order to verify robustness of the under-test device.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: December 18, 2018
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Sandeep Kumar Goel, Stanley John, Ji-Jan Chen, Yun-Han Lee
  • Publication number: 20180272508
    Abstract: A hexagonal wrench includes a body with at least one function end which is a twisted and equal-sided column. The twisted and equal-sided column includes a root section, an end section and a middle section which formed between the root section and the end section. A maximum twist angle is defined between the root section and the end section, and the maximum twist angle is equal to or less than 30 degrees. The root section has a first cross section and the end section has a second cross section. The first cross section is larger than second cross section.
    Type: Application
    Filed: March 24, 2017
    Publication date: September 27, 2018
    Inventor: Joun-Jan Chen