Patents by Inventor Po-Chih Chang
Po-Chih Chang 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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Patent number: 12002768Abstract: A semiconductor package and a manufacturing method for the semiconductor package are provided. The semiconductor package includes a molded semiconductor device, a first redistribution structure, and conductive vias. The molded semiconductor device comprises a sensor die with a first surface and a second surface opposite the first surface, wherein the sensor die has an input/output region and a sensing region at the first surface. The first redistribution structure is disposed on the first surface of the sensor die, wherein the first redistribution structure covers the input/output region and exposes the sensing region, and the first redistribution structure comprises a conductive layer having a redistribution pattern and a ring structure. The redistribution pattern is electrically connected with the sensor die. The ring structure surrounds the sensing region and is separated from the redistribution pattern, wherein the ring structure is closer to the sensing region than the redistribution pattern.Type: GrantFiled: August 27, 2021Date of Patent: June 4, 2024Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Yu-Chih Huang, Chih-Hao Chang, Po-Chun Lin, Chun-Ti Lu, Zheng-Gang Tsai, Shih-Wei Chen, Chia-Hung Liu, Hao-Yi Tsai, Chung-Shi Liu
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Publication number: 20240132312Abstract: An automatic document feeding device having a main body, a stopping assembly, an actuating assembly and a controller. The main body has a sheet conveying channel of a curvature shape. A sheet feeding roller assembly and a sheet conveying roller assembly are arranged on the sheet conveying channel. The stopping assembly is arranged between the sheet feeding roller assembly and the sheet conveying roller assembly. The stopping assembly is capable of being located in or out of the sheet conveying channel. A buffering channel is located between the stopping assembly and the sheet feeding roller assembly. The controller is electrically connected with the actuating assembly and the sheet feeding roller assembly. The controller controls the actuating assembly to hold the stopping assembly in the sheet conveying channel to block the sheet conveying channel in a predetermined period, and then controls the actuating assembly to stop holding the stopping assembly.Type: ApplicationFiled: December 29, 2022Publication date: April 25, 2024Inventors: Ya-Ching TUNG, Po-Chih CHANG
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Patent number: 11968856Abstract: Exemplary subpixel structures include a directional light-emitting diode structure characterized by a full-width-half-maximum (FWHM) of emitted light having a divergence angle of less than or about 10°. The subpixel structure further includes a lens positioned a first distance from the light-emitting diode structure, where the lens is shaped to focus the emitted light from the light-emitting diode structure. The subpixel structure still further includes a patterned light absorption barrier positioned a second distance from the lens. The patterned light absorption barrier defines an opening in the barrier, and the focal point of the light focused by the lens is positioned within the opening. The subpixels structures may be incorporated into a pixel structure, and pixel structures may be incorporated into a display that is free of a polarizer layer.Type: GrantFiled: October 4, 2021Date of Patent: April 23, 2024Assignee: Applied Materials, Inc.Inventors: Chung-Chih Wu, Po-Jui Chen, Hoang Yan Lin, Guo-Dong Su, Wei-Kai Lee, Chi-Jui Chang, Wan-Yu Lin, Byung Sung Kwak, Robert Jan Visser
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Publication number: 20240109739Abstract: This disclosure is directed to an automatic sheet feeding device having a flipping mechanism which is used for a sheet. The automatic sheet feeding device has a sheet outputting tray, a sheet outputting channel, the flipping mechanism and a switching guide mechanism. The sheet outputting channel is disposed corresponding to the sheet outputting tray. The flipping mechanism is arranged between the sheet outputting channel and the sheet outputting tray. The switching guide mechanism is arranged between the sheet outputting channel and the flipping mechanism, and the switching guide mechanism is used for guiding the sheet to be conveyed to the sheet outputting tray from the sheet outputting channel or conveyed to the sheet outputting tray from the flipping mechanism. Therefore, an efficiency of duplex scanning of the automatic sheet feeding device may be improved.Type: ApplicationFiled: November 23, 2022Publication date: April 4, 2024Inventors: Pei-Chi HO, Po-Chih CHANG
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Patent number: 11943643Abstract: An access point (AP) and a station (STA) communicate with each other, with the AP indicating to the STA either or both of a preamble detection (PD) channel and a signaling (SIG) content channel and with the STA being initially monitoring a primary frequency segment of a plurality of frequency segments in an operating bandwidth of the AP. A downlink (DL) or triggered uplink (UL) communication is performed between the AP and the STA during a transmission opportunity (TXOP) such that: (i) during the TXOP, the STA monitors a preamble on the PD channel and decodes a SIG content on the SIG content channel; and (ii) after an end of the TXOP, the STA switches to the primary frequency segment.Type: GrantFiled: July 21, 2021Date of Patent: March 26, 2024Assignee: MediaTek Singapore Pte. Ltd.Inventors: Kai Ying Lu, Yongho Seok, Hung-Tao Hsieh, Cheng-Yi Chang, James Chih-Shi Yee, Jianhan Liu, Po-Yuen Cheng
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Patent number: 11942906Abstract: The present invention provides a transmitter including a mixer, a harmonic impedance adjustment circuit and an amplifier. The mixer is configured to mix a first baseband signal with a first oscillation signal to generate a first mixed signal to a first node, and to mix a second baseband signal with a second oscillation signal to generate a second mixed signal to a second node. The harmonic impedance adjustment circuit is coupled between the first node and the second node, and is configured to reduce harmonic components of the first mixed signal and the second mixed signal to generate an adjusted first mixed signal and an adjusted second mixed signal. The amplifier is coupled to the harmonic impedance adjustment circuit, and is configured to generate an amplified signal according to the adjusted first mixed signal and the adjusted second mixed signal.Type: GrantFiled: February 7, 2022Date of Patent: March 26, 2024Assignee: Realtek Semiconductor Corp.Inventors: Ting-Yao Huang, Teng-Yuan Chang, Po-Chih Wang, Ka-Un Chan
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Patent number: 11858272Abstract: An ink circulation system, including an ink cartridge, an ink tank, an ink pump, first, second, and third valves, a print head, a heating assembly, and a positive-negative pressure assembly, is provided. The ink cartridge has an output pipeline and an ink cartridge valve. The ink tank is disposed on one side of the ink cartridge and connected to the output pipeline. The ink pump is connected to the output pipeline and the ink tank through an ink pipeline. The first valve is connected to the ink tank through a first pipeline. The second valve is disposed on the output pipeline. The third valve is connected to the output pipeline and the ink pipeline through a return pipeline. The print head is connected to the ink tank and the return pipeline. The heating assembly is disposed in the ink tank. The positive-negative pressure assembly is connected to the first pipeline.Type: GrantFiled: February 18, 2022Date of Patent: January 2, 2024Assignee: Kinpo Electronics, Inc.Inventors: Po-Chih Chang, Pei-Chi Ho, Ya-Ching Tung, Chi-Kuang Shen, Shou-Chih Sun, Yao-Te Huang
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Publication number: 20230173815Abstract: An ink circulation system, including an ink cartridge, an ink tank, an ink pump, first, second, and third valves, a print head, a heating assembly, and a positive-negative pressure assembly, is provided. The ink cartridge has an output pipeline and an ink cartridge valve. The ink tank is disposed on one side of the ink cartridge and connected to the output pipeline. The ink pump is connected to the output pipeline and the ink tank through an ink pipeline. The first valve is connected to the ink tank through a first pipeline. The second valve is disposed on the output pipeline. The third valve is connected to the output pipeline and the ink pipeline through a return pipeline. The print head is connected to the ink tank and the return pipeline. The heating assembly is disposed in the ink tank. The positive-negative pressure assembly is connected to the first pipeline.Type: ApplicationFiled: February 18, 2022Publication date: June 8, 2023Applicant: Kinpo Electronics, Inc.Inventors: Po-Chih Chang, Pei-Chi Ho, Ya-Ching Tung, Chi-Kuang Shen, Shou-Chih Sun, Yao-Te Huang
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Publication number: 20230059286Abstract: This disclosure is directed to an automatic feeding and scanning device having a scanning module, a paper feeding module and a cleaning module. The scanning module has a carrying platen, a scanning platen, and a scanner, the carrying platen and the scanning platen are light transmissive plates, two surfaces of the scanning platen are a bottom surface and a top surface opposite to the bottom surface, the scanner is arranged corresponding to the bottom surface of the scanning platen. The cleaning module has a brush and an actuating assembly connected to the brush and driving the brush. The brush is arranged corresponding to the top surface of the scanning platen, the actuating assembly drives the brush to scrape the top surface of the scanning platen.Type: ApplicationFiled: September 30, 2021Publication date: February 23, 2023Inventors: Zhen-Yang MA, Tzu-Cheng CHANG, Po-Chih CHANG
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Publication number: 20230039368Abstract: A dual-axle linkage detection structure includes a first object, a second object, a sensor body, and a shielding element. The first object is movably connected to a base. The second object is movably connected to the first object. The sensor body is disposed on the first object and includes detecting positions. The shielding element includes a shielding part. When the second object covers the first object and the first object covers the base, the shielding part moves into the detecting position. When the second object moves away from the first object, or when the first object moves away from the base and drives the shielding element to rotate, the shielding part moves out of the detecting position.Type: ApplicationFiled: October 25, 2021Publication date: February 9, 2023Inventors: Po-Chih CHANG, Sung-Po LIN, Tzu-Cheng CHANG
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Publication number: 20220367385Abstract: A package carrier, including a first redistribution structure layer, multiple conductive connecting members, a connection structure layer, at least one stiffener, and a molding compound, is provided. The conductive connecting members are disposed on a first surface of the first redistribution structure layer and are electrically connected to the first redistribution structure layer. The connection structure layer is disposed on a second surface of the first redistribution structure layer and includes a substrate and multiple pads. A top surface and a bottom surface of each pad are respectively exposed to an upper surface and a lower surface of the substrate. The pads are electrically connected to the first redistribution structure layer. The stiffener is disposed on the first surface and is located at least between the conductive connecting members. The molding compound is disposed on the first surface and covers the conductive connecting members and the stiffener.Type: ApplicationFiled: December 9, 2021Publication date: November 17, 2022Applicant: Industrial Technology Research InstituteInventors: Yu-Min Lin, Ching-Kuan Lee, Chao-Jung Chen, Ren-Shin Cheng, Ang-Ying Lin, Po-Chih Chang
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Patent number: 11431864Abstract: This disclosure is related to a duplex scanning device. The automatic document feeder includes a paper feeder body, a paper inlet and a paper outlet. The paper cassette includes an upper paper tray and a lower paper tray adjacent to the paper inlet and the paper outlet. The cassette power module includes a motor set and a transmission part. The transmission part drives the paper cassette to move on one side of the automatic document feeder to control the lower paper tray to connect with the paper inlet or the paper outlet. Therefore, the double-sided scanning of the document is completed by two-pass duplex scanning.Type: GrantFiled: August 18, 2021Date of Patent: August 30, 2022Assignee: KINPO ELECTRONICS, INC.Inventors: Po-Chih Chang, Sung-Po Lin, Tzu-Cheng Chang
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Patent number: 9721824Abstract: A bonding structure including a first substrate, a second substrate, and an adhesive layer is provided. The first substrate has a plurality of first trenches. The adhesive layer is located between the first substrate and the second substrate, and the first trenches are filled with the adhesive layer.Type: GrantFiled: September 22, 2015Date of Patent: August 1, 2017Assignee: Industrial Technology Research InstituteInventors: Kuan-Wei Chen, Pei-Jer Tzeng, Chien-Chou Chen, Po-Chih Chang
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Publication number: 20160336211Abstract: A bonding structure including a first substrate, a second substrate, and an adhesive layer is provided. The first substrate has a plurality of first trenches. The adhesive layer is located between the first substrate and the second substrate, and the first trenches are filled with the adhesive layer.Type: ApplicationFiled: September 22, 2015Publication date: November 17, 2016Inventors: Kuan-Wei Chen, Pei-Jer Tzeng, Chien-Chou Chen, Po-Chih Chang
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Patent number: 8942490Abstract: A method of compressing an image is provided by saving compressed color components into temporary buffers. In different time slots, compressed color components are stored in different temporary buffer. When data in the temporary buffers reach a predetermined size, data are moved to a second buffer larger than the temporary buffers. When the second buffer stores a predetermined amount of data, data are moved to an external memory.Type: GrantFiled: July 8, 2008Date of Patent: January 27, 2015Inventors: Yin-Chun Blue Lan, Yen Chuo, Po-Chih Chang
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Patent number: 8657280Abstract: A paper-feeding device and a multi-function printer (MFP) using the paper-feeding device are provided. The MFP includes a housing with the paper-feeding device installed thereon. The paper-feeding device includes an outer case, an inner case and a retainer. The outer case has first side-walls, openings and slots, in which each opening and each slot on the opening are correspondingly disposed on each first side-wall. The inner case is located beside the first side-walls of the outer case and has a second side-wall. The second side-wall has a position-limiting rib protruding towards the first side-walls. The retainer is located between the first side-walls and has a body, a protrusion and a pivot, in which the protrusion is disposed at a top-portion of the body and correspondingly located in the slots, and the pivot is located between the protrusion and a retaining-portion of the body and correspondingly locked in the openings.Type: GrantFiled: April 23, 2012Date of Patent: February 25, 2014Assignees: Cal-Comp Electronics & Communications Company Limited, Kinpo Electronics, Inc.Inventors: Po-Chih Chang, Chung-Liang Huang
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Patent number: 8528893Abstract: A paper feeding device and a multi-function printer using the same are provided. The paper feeding device includes a frame, a top cover, a set of gear chains, a power unit and a set of driving gears. The set of gear chains and the power unit are disposed on a side of the frame. The set of driving gears is disposed on the top cover. When the top cover is closed relatively to the frame, the set of driving gears interferes with the power unit, and the power unit provides a power to enable the set of driving gears to rotate, so as to drive the set of gear chains. When the top cover is opened relatively to the frame, the set of driving gears releases interference with the power unit and the set of gear chains, and the set of gear chains is at a free rotation status.Type: GrantFiled: July 23, 2012Date of Patent: September 10, 2013Assignees: Cal-Comp Electronics & Communications Company Limited, Kinpo Electronics, Inc.Inventors: Chen-Fu Huang, Po-Chih Chang, Pei-Chi Ho
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Patent number: 8474813Abstract: A blocking module is used for blocking at least an object from passing through a rail. The blocking module includes a linkage member and a blocking member. The linkage member has a first end and a second end, and there is a buffering space at a side of the first end. The blocking member has a pivoting end and a free end, in which the pivoting end is pivoted at the second end and the free end hangs down under the pivoting end due to gravity. When the free end of the blocking member leans against on the object on the rail, the object applies a counterforce onto the blocking member so as to drive the first end of the linkage member to move towards the buffering space. The invention also discloses a multi-function printer.Type: GrantFiled: October 30, 2011Date of Patent: July 2, 2013Assignees: Cal-Comp Electronics & Communications Company Limited, Kinpo Electronics, Inc.Inventors: Kai-Yuan Cheng, Chi-Tsung Chen, Po-Chih Chang
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Publication number: 20130134666Abstract: A paper feeding device and a multi-function printer using the same are provided. The paper feeding device includes a frame, a top cover, a set of gear chains, a power unit and a set of driving gears. The set of gear chains and the power unit are disposed on a side of the frame. The set of driving gears is disposed on the top cover. When the top cover is closed relatively to the frame, the set of driving gears interferes with the power unit, and the power unit provides a power to enable the set of driving gears to rotate, so as to drive the set of gear chains. When the top cover is opened relatively to the frame, the set of driving gears releases interference with the power unit and the set of gear chains, and the set of gear chains is at a free rotation status.Type: ApplicationFiled: July 23, 2012Publication date: May 30, 2013Applicants: KINPO ELECTRONICS, INC., Cal-Comp Electronics & Communications Company LimitedInventors: Chen-Fu Huang, Po-Chih Chang, Pei-Chi Ho
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Publication number: 20130114986Abstract: A paper-feeding device and a multi-function printer (MFP) using the paper-feeding device are provided. The MFP includes a housing with the paper-feeding device installed thereon. The paper-feeding device includes an outer case, an inner case and a retainer. The outer case has first side-walls, openings and slots, in which each opening and each slot on the opening are correspondingly disposed on each first side-wall. The inner case is located beside the first side-walls of the outer case and has a second side-wall. The second side-wall has a position-limiting rib protruding towards the first side-walls. The retainer is located between the first side-walls and has a body, a protrusion and a pivot, in which the protrusion is disposed at a top-portion of the body and correspondingly located in the slots, and the pivot is located between the protrusion and a retaining-portion of the body and correspondingly locked in the openings.Type: ApplicationFiled: April 23, 2012Publication date: May 9, 2013Applicants: Kinpo Electronics, Inc., Cal-Comp Electronics & Communications Company LimitedInventors: Po-Chih Chang, Chung-Liang Huang