Patents by Inventor Chang Chen
Chang 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: 20250018517Abstract: A work piece processing system includes a grinding wheel (12) configured to remove material from a work piece in a grinding process. The grinding wheel (12) includes a conductive layer (122) surrounding a rotation axis of the grinding wheel (12) and a number of grinding members (123) positioned at an outer surface of the conductive layer (122). The system also includes a holding module (20) and an electrolyte supply line (365). In addition, the system includes an actuator assembly (30) for driving a rotation of the grinding wheel (12) and a rotation of the holding module (20), and a power supply module (45) to apply current to the conductive layer (122) and the holding module (20). The work piece processing system uses electrochemical removal to reduce grinding damage and improve machining efficiency. A work piece processing method is also provided.Type: ApplicationFiled: November 15, 2022Publication date: January 16, 2025Inventors: YAO-GUANG YANG, KUEN-CHIH LAN, ZHI WEN FAN, CHAO-CHANG CHEN
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Publication number: 20250018486Abstract: A wafer processing system (1) is provided. The system (1) includes a processing tool (10) comprising at least one grinding member (16) used to remove material from a wafer substrate (80). The system (1) also includes an electrolyte supply line (361) used to supply an electrolyte to the wafer substrate (80). The system (1) further includes a holding module (20) for holding the wafer substrate (80). The holding module (20) includes a conductive base (21) and a conductive porous member (22) positioned on the top surface of the conductive base (21). A vacuum source (53) fluidly communicated with fluid channel (214) formed in the conductive base (21) to create a vacuum to hold the wafer substrate (80) on the conductive porous member (22).Type: ApplicationFiled: November 15, 2022Publication date: January 16, 2025Inventors: YAO-GUANG YANG, KUEN-CHIH LAN, ZHI WEN FAN, CHAO-CHANG CHEN
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Patent number: 12199521Abstract: A synchronous full-bridge rectifier circuit includes: a first high-side transistor, a first low-side transistor, a second high-side transistor and a second low-side transistor which are configured to generate a DC power source from an AC power source, wherein the first high-side transistor and the first low-side transistor are coupled to a live wire of the AC power source, and the second high-side transistor and the second low-side transistor are coupled to a neutral wire of the AC power source; a first detection transistor, coupled to the live wire and configured to generate a first detection signal; and a second detection transistor, coupled to the neutral wire configured to generate a second detection signal; wherein the first low-side transistor is turned on after the body-diode of the first low-side transistor is turned on; the second low-side transistor is turned on after the body-diode of the second low-side transistor is turned on.Type: GrantFiled: June 14, 2022Date of Patent: January 14, 2025Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Ta-Yung Yang, Yu-Chang Chen
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Publication number: 20250013250Abstract: Embodiments of the disclosure provide an unmanned vehicle system, including a plurality of unmanned vehicles. The plurality of unmanned vehicles include a first unmanned vehicle and a second unmanned vehicle. The first unmanned vehicle provides an information pattern, wherein the information pattern indicates a control information. The second unmanned vehicle acquires the control information by identifying the information pattern.Type: ApplicationFiled: April 23, 2024Publication date: January 9, 2025Applicant: Qisda CorporationInventors: Chao-Shun Yu, Wen-Chang Chen, Chun-Sheng Hu
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Patent number: 12191621Abstract: An EUV radiation light source generation apparatus includes a pump laser, at least one pulse shaping unit, a wavelength conversion unit, and a high-order harmonics generation unit. The pump laser provides a pulse laser radiation beam. Each pulse shaping unit conducts a spectrum extending operation and a phase compensation operation to the pulse laser radiation beam. The phase compensation operation makes multiple frequency components of the pulse laser radiation beam emitted by the pulse shaping unit to be substantially in phase. The wavelength conversion unit conducts a center wavelength conversion operation to the pulse laser radiation beam. The high-order harmonics generation unit receives the pulse laser radiation beam processed by the pulse shaping unit and the center wavelength conversion operation, and focuses the received pulse laser radiation beam to a high order harmonic generation medium to generate a high order harmonic radiation beam.Type: GrantFiled: November 16, 2022Date of Patent: January 7, 2025Assignee: NATIONAL TSING HUA UNIVERSITYInventors: Andrew Hing Cheong Kung, Pei-Chi Huang, Chih-Hsuan Lu, Ming-Chang Chen
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Publication number: 20250001522Abstract: A method for joining external tabs of a battery cell to a terminal includes providing a battery cell stack including C cathode electrodes, A anode electrodes, and S separators, where C, S and A are integers greater than one. The method includes arranging a stack of external tabs of one of the C cathode electrodes and the A anode electrodes on a terminal; creating a trench in the stack of external tabs of the one of the C cathode electrodes and the A anode electrodes at a weld location during a first laser processing step; and welding the stack of external tabs of the one of the C cathode electrodes and the A anode electrodes at the weld location during a second laser processing step.Type: ApplicationFiled: June 28, 2023Publication date: January 2, 2025Inventors: Teresa Jean RINKER, Masoud Mohammadpour, Junjie Ma, Chih-Chang Chen
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Patent number: 12184183Abstract: A flyback power converter includes: a first transistor switching a transformer for generating a primary switching current and an output voltage; and a second transistor generating a circulated current to achieve ZVS (zero voltage switching) of the first transistor; wherein the flyback power converter actively forces at least one switching cycle to be operated in a DCM (discontinuous conduction mode) operation when the primary switching current is determined to have been operating in a non-DCM operation for a predetermined number of switching cycles. The flyback power converter generates a demagnetized signal which emulates the demagnetized time of the transformer for controlling the second transistor during the non-DCM operation. The flyback power converter calibrates the demagnetized signal according to the demagnetized time during the actively fored DCM operation.Type: GrantFiled: February 16, 2022Date of Patent: December 31, 2024Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Ta-Yung Yang, Ying-Chieh Su, Yu-Chang Chen
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Publication number: 20240427063Abstract: An electronic device includes: a backlight module; a panel disposed on the backlight module; a viewing angle control element disposed between the backlight module and the panel; and a light modulation element disposed between the panel and the viewing angle control element. The light modulation element has a plurality of prism structures, and at least one of the plurality of prism structures includes a first bottom angle and a second bottom angle. The first bottom angle is larger than the second bottom angle, and a ratio of the first bottom angle to the second bottom angle satisfies 1<the first bottom angle/the second bottom angle?15.Type: ApplicationFiled: May 22, 2024Publication date: December 26, 2024Inventors: Chih-Chang CHEN, Bo-Tsuen CHEN
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Publication number: 20240429067Abstract: The present disclosure describes a processing system that includes a stage configured to hold a substrate thereon and an exhaust system. The exhaust system can include a perforated plate with a exhaust holes and an exhaust port. The perforated plate can be positioned between the substrate and the exhaust port. Each of the exhaust holes includes a shutter.Type: ApplicationFiled: June 22, 2023Publication date: December 26, 2024Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Yi-Chang CHEN, Yao Hwan Kao
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Publication number: 20240422265Abstract: An example electronic device includes a network communication interface to connect to a conference server, a central control device communication interface to connect to a local central control device, a microphone and a processor. The processor is to receive audio at the microphone and send the audio to the local central control device and to the conference server. The processor is to send the audio to the local central control device such that it is received by a nearby electronic device before the audio is received from the conference server by the nearby electronic device.Type: ApplicationFiled: June 15, 2023Publication date: December 19, 2024Applicant: Hewlett-Packard Development Company, L.P.Inventors: He-Di Liu, Ting Fong Wang, Hsin-Chih Lin, Xin-Chang Chen, Yao Cheng Yang
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Publication number: 20240420441Abstract: An occupancy sensing device comprises an ROI readout unit, configured to excerpt an ROI image from a plurality of consecutive images in response to an ROI request; an object tracking unit, coupled to the ROI readout unit, configured to perform object tracking to obtain a moving object list according to motion data of the plurality of consecutive images, determine to send the ROI request according to a first policy, and determine an object tracking result according to the moving object list and an object recognition result; an object recognition unit, coupled to the ROI readout unit, configured to perform object recognition to obtain the object recognition result according to the ROI image; and an occupancy determination unit, coupled to the object tracking unit, configured to determine an occupancy status according to the object tracking result; wherein the first policy comprises an appearance and a disappearance of an object.Type: ApplicationFiled: June 19, 2023Publication date: December 19, 2024Applicant: Himax Imaging LimitedInventors: Wei-Chieh Yang, Po-Chang Chen
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Publication number: 20240418578Abstract: An accurate temperature measurement structure of a wide temperature range includes: a lens set; an optical base, having a neutral density slot and being fixed with the lens set by a first screw; a mask shutter assembly, fixed with the optical base by a second screw; and a temperature sensing unit, for sensing a target object temperature so as to obtain a measured temperature value, the temperature sensing unit performing a temperature normalization correction when the accurate temperature measurement structure of the wide temperature range is in a power-on stage to obtain a signal strength value, setting a plurality of signal conditions according to the signal strength value to obtain a dynamic linearity strength value and accordingly determining an extreme value region, so as to determine whether to add a neutral density filter to the neutral density slot.Type: ApplicationFiled: June 13, 2023Publication date: December 19, 2024Inventors: SHIANG-FENG TANG, SHUN-LUNG YEN, KUO-JEN CHANG, HSIN-CHANG CHEN
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Publication number: 20240410735Abstract: The disclosed apparatus is a fuel gas cylinder regulator which presents a new integrated device that consists of a microfabricated MEMS mass flow sensor, a low energy Bluetooth module, a standard pressure regulator, and an electric powered shutoff valve. The apparatus is capable of wireless data communication, and long-distance communication as well. The electric operated shutoff valve can spontaneously shut off the fuel gas supply once gas leakage or gas passage clog occurs. The apparatus can record and transmit the fuel gas consumption data to the suppliers or third-party service providers. It can also track and report the cylinder status, such as leakage and location, which can significantly enhance the efficiency and safety of fuel gas utilization and distribution logistics.Type: ApplicationFiled: June 8, 2023Publication date: December 12, 2024Applicant: SIVELA TECHNOLOGY, INC.Inventors: Liji Huang, Chih-Chang Chen
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Patent number: 12165867Abstract: Embodiments are directed to a method for minimizing electrostatic charges in a semiconductor substrate. The method includes depositing photoresist on a semiconductor substrate to form a photoresist layer on the semiconductor substrate. The photoresist layer is exposed to radiation. The photoresist layer is developed using a developer solution. The semiconductor substrate is cleaned with a first cleaning liquid to wash the developer solution from the photoresist layer. A tetramethylammonium hydroxide (TMAH) solution is applied to the semiconductor substrate to reduce charges accumulated in the semiconductor substrate.Type: GrantFiled: July 24, 2023Date of Patent: December 10, 2024Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Wei-Lin Chang, Chih-Chien Wang, Chihy-Yuan Cheng, Sz-Fan Chen, Chien-Hung Lin, Chun-Chang Chen, Ching-Sen Kuo, Feng-Jia Shiu
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Patent number: 12165984Abstract: A semiconductor device package includes a number of interposers mounted to the carrier, wherein the number of interposers may be arranged in an irregular pattern.Type: GrantFiled: September 6, 2022Date of Patent: December 10, 2024Assignee: ADVANCED SEMICONDUCTOR ENGINEERING, INC.Inventors: Hao-Chih Hsieh, Tun-Ching Pi, Sung-Hung Chiang, Yu-Chang Chen
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Publication number: 20240402915Abstract: A memory controller is arranged to access a memory device, and includes a receiving circuit. The receiving circuit is arranged to receive a data signal and a data strobe signal from the memory device, and includes a sampling circuit and a comparison circuit. The sampling circuit is arranged to sample the data signal or a delayed data signal according to a plurality of delayed versions of the data strobe signal to generate a plurality of sampling values, wherein the delayed data signal is a delayed version of the data signal. The comparison circuit is arranged to compare the plurality of sampling values to obtain a comparison result, and arranged to determine to provide the data signal or the delayed data signal to the sampling circuit according to the comparison result.Type: ApplicationFiled: May 15, 2024Publication date: December 5, 2024Applicant: Realtek Semiconductor Corp.Inventors: Shih-Chang Chen, Chih-Wei Chang, Chun-Chi Yu
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Publication number: 20240399975Abstract: A display device is provide. The display device is within a transportation device having a first seating area, including a display unit, a mechanical platform, and a mechanical shaft assembly. The mechanical platform is configured to correspond to the first seating area. The mechanical shaft assembly is disposed on the mechanical platform and including a first shaft portion, a second shaft portion, and a third shaft portion. The first shaft portion is connected to the display unit and driving the display unit to move along a horizontal direction. The second shaft portion is connected to an upper end of the display unit and driving the display unit to rotate around a second axis. The third shaft portion is connected to the second shaft portion and driving the display unit to rotate around a third axis.Type: ApplicationFiled: April 26, 2024Publication date: December 5, 2024Inventors: Ta-Chin HUANG, Ching-I LO, Hung-Ching LEE, Hsien-Chang CHEN, Sheng-Yu CHIOU
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Patent number: 12158177Abstract: A sliding positioning structure includes a seat, a first fastening body and a second fastening body. The first fastening body is movably assembled at the seat. The second fastening body is provided at the seat, and is for longitudinally fastening, latitudinally fastening or rotationally fastening to a first object. Accordingly, the seat can be quickly assembled with the first object by using the second fastening body, and be coupled with or removed from a second object by using the first fastening body, thereby accomplishing coupling or disengagement of two objects and achieving effects of repeated and quickly coupling and disengagement.Type: GrantFiled: December 20, 2019Date of Patent: December 3, 2024Assignee: FIVETECH TECHNOLOGY INC.Inventors: Ting-Jui Wang, Hsien-Chang Chen
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Patent number: 12154729Abstract: A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.Type: GrantFiled: December 28, 2023Date of Patent: November 26, 2024Inventors: Yen-Chang Chen, Po-Yueh Chou
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Publication number: 20240387410Abstract: The present disclosure describes a semiconductor structure including a TSV in contact with a substrate and a metal ring structure laterally surrounding the TSV. The metal ring structure includes one or more metal rings arranged as a stack and one or more metal vias interposed between two adjacent metal rings of the one or more metal rings. The metal ring structure is electrically coupled to the substrate through one or more conductive structures.Type: ApplicationFiled: July 30, 2024Publication date: November 21, 2024Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Shih-Chang CHEN, Kun-Hsiang LIN, Cheng-Chien LI