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).
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Publication number: 20220271661Abstract: 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: ApplicationFiled: December 29, 2021Publication date: August 25, 2022Inventors: Chieh-Ju TSAI, Ching-Jan CHEN, Zhen-Guo DING, Zhe-Hui LIN, Wei-Ling CHEN
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Publication number: 20220271662Abstract: 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: ApplicationFiled: December 30, 2021Publication date: August 25, 2022Inventors: Chieh-Ju TSAI, Ching-Jan CHEN, Zhen-Guo DING, Zhe-Hui LIN, Wei-Ling CHEN
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Patent number: 11411571Abstract: 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: GrantFiled: May 26, 2021Date of Patent: August 9, 2022Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
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Publication number: 20220244486Abstract: 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: ApplicationFiled: April 23, 2021Publication date: August 4, 2022Applicant: LARGAN DIGITAL CO.,LTD.Inventors: Hao Jan CHEN, Yu Chen LAI, Ming-Ta CHOU, Te-Sheng TSENG
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Publication number: 20220239835Abstract: 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: ApplicationFiled: April 18, 2022Publication date: July 28, 2022Applicant: LARGAN DIGITAL CO.,LTD.Inventors: Lin An CHANG, Hao Jan CHEN, Ming-Ta CHOU, Chen-Yi HUANG
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Patent number: 11336828Abstract: 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: GrantFiled: September 30, 2020Date of Patent: May 17, 2022Assignee: LARGAN DIGITAL CO., LTD.Inventors: Lin An Chang, Hao Jan Chen, Ming-Ta Chou, Chen-Yi Huang
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Publication number: 20220113492Abstract: 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: ApplicationFiled: August 26, 2021Publication date: April 14, 2022Inventors: Hao-Jan CHEN, Heng-Yi SU, Ming-Ta CHOU, Chen-Yi HUANG, Ming-Shun CHANG
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Publication number: 20220030168Abstract: 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: ApplicationFiled: September 30, 2020Publication date: January 27, 2022Applicant: LARGAN DIGITAL CO.,LTD.Inventors: Lin An CHANG, Hao Jan CHEN, Ming-Ta CHOU, Chen-Yi HUANG
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Publication number: 20210396949Abstract: 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: ApplicationFiled: September 21, 2020Publication date: December 23, 2021Inventors: Heng-Yi SU, Hao-Jan CHEN, Ming-Ta CHOU, Te-Sheng TSENG
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Publication number: 20210281268Abstract: 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: ApplicationFiled: May 26, 2021Publication date: September 9, 2021Inventors: Sandeep Kumar GOEL, Ji-Jan CHEN, Stanley JOHN, Yun-Han LEE, Yen-Hao HUANG
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Patent number: 11025261Abstract: 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: GrantFiled: June 5, 2020Date of Patent: June 1, 2021Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
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Publication number: 20200304133Abstract: 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: ApplicationFiled: June 5, 2020Publication date: September 24, 2020Inventors: Sandeep Kumar GOEL, Ji-Jan CHEN, Stanley JOHN, Yun-Han LEE, Yen-Hao HUANG
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Patent number: 10680627Abstract: 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: GrantFiled: April 2, 2019Date of Patent: June 9, 2020Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
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Patent number: 10581319Abstract: 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: GrantFiled: July 24, 2019Date of Patent: March 3, 2020Assignee: NATIONAL TAIWAN UNIVERSITYInventors: Yuan-Chih Lin, Ching-Jan Chen
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Publication number: 20190386540Abstract: 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: ApplicationFiled: September 17, 2018Publication date: December 19, 2019Applicant: ACTRON TECHNOLOGY CORPORATIONInventors: Chia-Sung Yu, Ching-Jan Chen, Yuan-Chih Lin
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Publication number: 20190229737Abstract: 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: ApplicationFiled: April 2, 2019Publication date: July 25, 2019Inventors: Sandeep Kumar GOEL, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
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Patent number: 10286527Abstract: 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: GrantFiled: March 24, 2017Date of Patent: May 14, 2019Inventor: Joun-Jan Chen
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Patent number: 10256828Abstract: 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: GrantFiled: September 21, 2017Date of Patent: April 9, 2019Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Sandeep Kumar Goel, Ji-Jan Chen, Stanley John, Yun-Han Lee, Yen-Hao Huang
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Patent number: 10156609Abstract: 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: GrantFiled: May 23, 2017Date of Patent: December 18, 2018Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.Inventors: Sandeep Kumar Goel, Stanley John, Ji-Jan Chen, Yun-Han Lee
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Publication number: 20180272508Abstract: 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: ApplicationFiled: March 24, 2017Publication date: September 27, 2018Inventor: Joun-Jan Chen