Patents by Inventor Kuan-Yu Chu
Kuan-Yu Chu 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: 10784763Abstract: An inverter circuit may include an inverter, a driver coupled to the inverter, and a slew rate control module configured to modify a slew rate of the driver. The slew rate may be modified based on a magnitude of a load driven by the inverter circuit. The magnitude of the load driven by the inverter circuit may be indicated by a current representing a load current or a voltage representing an input voltage. The slew rate may also be modified based on a mode configuration of the inverter circuit.Type: GrantFiled: March 5, 2018Date of Patent: September 22, 2020Assignee: MediaTek Inc.Inventors: Kuan-Yu Chu, HuaChiang Huang, Chih-Chen Li, Shan-Fong Hong
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Patent number: 10396771Abstract: A voltage supply circuit is provided. The voltage supply circuit is capable of generating a loading current at an output node. The voltage supply circuit includes a plurality of inductors and a plurality of driver circuits. The plurality of inductors are coupled to the output node. Each inductor has an inductance value. The plurality of driver circuits are coupled to the plurality of inductors, respectively. The inductance values of at least two inductors among the plurality of inductors are greater than the inductance value of another inductor.Type: GrantFiled: March 14, 2018Date of Patent: August 27, 2019Assignee: MediaTek Inc.Inventors: Chih-Chen Li, Kuan-Yu Fang, Kuan-Yu Chu, Yen-Hsun Hsu
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Patent number: 10211732Abstract: An SMPS (Switched Mode Power Supply) circuit includes a first switch element, a second switch element, an inductor, a capacitor, a current sensor, a current comparator, and a controller. The first switch element is coupled between a first power node and a switch node. The second switch element is coupled between the switch node and a second power node. The inductor is coupled between the switch node and an output node. The capacitor is coupled between the output node and the second power node. The current sensor detects a switch current through the second switch element. The current comparator compares the switch current with a first reference current to generate a comparison signal. The controller controls the first switch element and the second switch element according to the comparison signal and a switch voltage at the switch node. The invention can avoid an excessive SMPS output current.Type: GrantFiled: August 18, 2016Date of Patent: February 19, 2019Assignee: MediaTek Inc.Inventors: Chih-Chen Li, Kuan-Yu Chu, Shan-Fong Hong
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Patent number: 10211723Abstract: The invention provides a regulator for DC-DC hybrid-mode power regulation of an output voltage and a load current. The regulator may include a controller and a back-end circuit. The controller controls the output voltage and the load current by charging a connection node when a driving signal is at an on-level, and stopping charging the connection node when the driving signal is at an off-level. The back-end circuit is coupled to the controller, capable of switching between a first mode and a second mode to control transition of the driving signal by different schemes. The back-end circuit switches from the second mode to the first mode when a mode-switch criterion is satisfied, and whether the mode-switch criterion is satisfied is independent of a measurement of the output voltage.Type: GrantFiled: October 26, 2016Date of Patent: February 19, 2019Assignee: MEDIATEK INC.Inventors: Shan-Fong Hong, Chih-Chen Li, Kuan-Yu Chu, Chien-Wei Kuan, Yen-Hsun Hsu
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Patent number: 10116211Abstract: A power converter with adaptive zero-crossing current detection is provided. The power converter includes a first transistor, a second transistor, a PWM (Pulse Width Modulation) controller, a low-pass filter, and a delay controller. The first transistor is coupled between a supply voltage and a common node. The second transistor is coupled between the common node and a ground voltage. The common node has a reactive voltage. A reactive current flows through the common node. The PWM controller selectively enables and disables the first transistor and the second transistor according to a second control signal and a first transistor control signal. The low-pass filter is coupled between the common node and an output node. The delay controller generates the second control signal according to the reactive voltage.Type: GrantFiled: October 28, 2015Date of Patent: October 30, 2018Assignee: MEDIATEK INC.Inventors: Yung Hsu Chen, Kuan-Yu Chu
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Publication number: 20180262097Abstract: An inverter circuit may include an inverter, a driver coupled to the inverter, and a slew rate control module configured to modify a slew rate of the driver. The slew rate may be modified based on a magnitude of a load driven by the inverter circuit. The magnitude of the load driven by the inverter circuit may be indicated by a current representing a load current or a voltage representing an input voltage. The slew rate may also be modified based on a mode configuration of the inverter circuit.Type: ApplicationFiled: March 5, 2018Publication date: September 13, 2018Applicant: MediaTek Inc.Inventors: Kuan-Yu Chu, HuaChiang Huang, Chih-Chen Li, Shan-Fong Hong
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Publication number: 20180205371Abstract: A voltage supply circuit is provided. The voltage supply circuit is capable of generating a loading current at an output node. The voltage supply circuit includes a plurality of inductors and a plurality of driver circuits. The plurality of inductors are coupled to the output node. Each inductor has an inductance value. The plurality of driver circuits are coupled to the plurality of inductors, respectively. The inductance values of at least two inductors among the plurality of inductors are greater than the inductance value of another inductor.Type: ApplicationFiled: March 14, 2018Publication date: July 19, 2018Applicant: MediaTek Inc.Inventors: Chih-Chen Li, Kuan-Yu Fang, Kuan-Yu Chu, Yen-Hsun Hsu
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Publication number: 20170310211Abstract: The invention provides a regulator for DC-DC hybrid-mode power regulation of an output voltage and a load current. The regulator may include a controller and a back-end circuit. The controller controls the output voltage and the load current by charging a connection node when a driving signal is at an on-level, and stopping charging the connection node when the driving signal is at an off-level. The back-end circuit is coupled to the controller, capable of switching between a first mode and a second mode to control transition of the driving signal by different schemes. The back-end circuit switches from the second mode to the first mode when a mode-switch criterion is satisfied, and whether the mode-switch criterion is satisfied is independent of a measurement of the output voltage.Type: ApplicationFiled: October 26, 2016Publication date: October 26, 2017Inventors: Shan-Fong Hong, Chih-Chen Li, Kuan-Yu Chu, Chien-Wei Kuan, Yen-Hsun Hsu
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Publication number: 20170077813Abstract: An SMPS (Switched Mode Power Supply) circuit includes a first switch element, a second switch element, an inductor, a capacitor, a current sensor, a current comparator, and a controller. The first switch element is coupled between a first power node and a switch node. The second switch element is coupled between the switch node and a second power node. The inductor is coupled between the switch node and an output node. The capacitor is coupled between the output node and the second power node. The current sensor detects a switch current through the second switch element. The current comparator compares the switch current with a first reference current to generate a comparison signal. The controller controls the first switch element and the second switch element according to the comparison signal and a switch voltage at the switch node. The invention can avoid an excessive SMPS output current.Type: ApplicationFiled: August 18, 2016Publication date: March 16, 2017Inventors: Chih-Chen LI, Kuan-Yu CHU, Shan-Fong HONG
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Publication number: 20160233771Abstract: A power converter with adaptive zero-crossing current detection is provided. The power converter includes a first transistor, a second transistor, a PWM (Pulse Width Modulation) controller, a low-pass filter, and a delay controller. The first transistor is coupled between a supply voltage and a common node. The second transistor is coupled between the common node and a ground voltage. The common node has a reactive voltage. A reactive current flows through the common node. The PWM controller selectively enables and disables the first transistor and the second transistor according to a second control signal and a first transistor control signal. The low-pass filter is coupled between the common node and an output node. The delay controller generates the second control signal according to the reactive voltage.Type: ApplicationFiled: October 28, 2015Publication date: August 11, 2016Inventors: Yung Hsu CHEN, Kuan-Yu CHU
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Publication number: 20150077654Abstract: A touch panel having a light transmitting area and a light shielding area adjacent to the light transmitting area is provided. The touch panel includes a cover plate, a first decoration layer, a touch-sensing element and a metal conductive layer. The first decoration layer is disposed on the cover plate and located in the light shielding area. The first decoration layer has at least one hollow area. The touch-sensing element is disposed on the cover plate and at least located in the light transmitting area. The metal conductive layer is disposed on the first decoration layer, located in the light shielding area and surrounds the touch-sensing element. A portion of the metal conductive layer surrounds the hollow area.Type: ApplicationFiled: September 17, 2014Publication date: March 19, 2015Applicant: WINTEK CORPORATIONInventors: Kuan-Yu Chu, Yu-Ching Wang, Yung-Hui Chang, Chin-Pei Hwang, Ming-Wu Chen
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Publication number: 20150049263Abstract: A touch display device including a touch panel, a protection layer, a conductive optical adhesive layer and a display panel is provided. The touch panel includes a substrate, pads, at least one grounding pad, a touch-sensing device, and at least one ESD protection line. The touch panel includes a pad area and an active area. The pads and the grounding pad are disposed on the substrate and located in the pad area. The touch-sensing device is disposed on the substrate and located in the active area. The ESD protection line is disposed on the substrate and located at a side of the active area. The protection layer including a first opening covers the touch panel and a portion of the pad area is exposed by the first opening. The conductive optical adhesive layer is disposed on the protection layer and electrically connected to the ESD protection circuit.Type: ApplicationFiled: August 14, 2014Publication date: February 19, 2015Applicant: WINTEK CORPORATIONInventors: Kuan-Yu Chu, Chen-Fu Huang, Chin-Pei Hwang, Ming-Wu Chen, Chun-Cheng Huang, Yu-Ching Wang
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Publication number: 20140362043Abstract: The present invention discloses a touch panel, which includes a substrate, a plurality of first axis electrodes, a plurality of second axis electrodes and an insulation structure. The first axis electrodes are disposed on the substrate along a first direction and each of the first axis electrodes includes a plurality of first sub electrodes and a plurality of connection structures. Each of the connection structures is at least partially disposed between each of the first sub electrodes and the substrate, and is electrically connected to two adjacent first sub electrodes. Each of the connection structures includes a first metal layer and a low reflective layer disposed between the substrate and the first metal layer. The low reflective layer of the present invention is applied to reduce the visibility of the connection structures, as well as to enhance the reliability of the touch panel.Type: ApplicationFiled: June 11, 2014Publication date: December 11, 2014Inventors: Kuan-Yu Chu, Chun-Chin Chang, Chen-Fu Huang, Ming-Wu Chen, Chin-Pei Hwang, Kuo-Chang Su, Chin-Chang Liu, Siang-Lin Huang, Ming-Shan Lai
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Publication number: 20140354591Abstract: A touch panel includes a substrate, a patterned decoration layer, a patterned transparent conductive layer and an optical compensation layer. The patterned decoration layer is disposed on the substrate so as to define an opening region and a hole on the substrate. The hole is disposed adjacently to a side of the opening region. The patterned transparent conductive layer is disposed on the substrate. The patterned transparent conductive layer includes a transparent conductive pattern. The transparent conductive pattern is disposed correspondingly to the hole, and the transparent conductive pattern completely covers the hole along a vertical projective direction perpendicular to the substrate. The optical compensation layer is disposed on the substrate, and the optical compensation layer covers the hole along the vertical projective direction.Type: ApplicationFiled: May 30, 2014Publication date: December 4, 2014Applicant: Wintek CorporationInventors: Kuan-Yu Chu, Yu-Ching Wang, Chin-Pei Hwang, Ming-Wu Chen, Shih-Yun Chuang, Yuan-Kang Tseng
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Publication number: 20140300835Abstract: A touch panel, having a light transmission touch sensing region and a peripheral region adjacent to at least one side of the light transmission touch sensing region, includes an inner frame and a decoration frame disposed in the peripheral region. The peripheral region has an inner edge and an outer edge, wherein the inner edge is closer to the light transmission touch sensing region than the outer edge. The inner sidewall of the inner frame is disposed along the inner edge of the peripheral region. The decoration frame includes at least one decoration layer. The pattern of the decoration layer does not exceed the inner edge of the peripheral region.Type: ApplicationFiled: April 3, 2014Publication date: October 9, 2014Applicant: WINTEK CORPORATIONInventors: Kuan-Yu Chu, Yu-Ching Wang, Chin-Pei Hwang, Ming-Wu Chen, Chin-Yi Hsu, Chun-Cheng Huang, Chen-Fu Huang, Yi-Chun Lin, Ming-Kung Wu, Ta-Wei Yeh
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Publication number: 20140226086Abstract: Touch panel having electrostatic protection is provided. The touch panel includes a substrate, a plurality of sensing electrodes, a plurality of conductive wires and an electrostatic protection line. The substrate has a touch sensitive area and a periphery area surrounding the touch sensitive area. The inner part of the periphery area is a first layout area. The outer part of the periphery area is a second layout area. The sensing electrodes are formed in the touch sensitive area. The conductive wires are disposed in the first layout area. The electrostatic protection line is disposed in the second layout area and adjacent to the conductive wires. The width of the electrostatic protection line is greater than that of the conductive wires. The distance separating the outside of the electrostatic protection line from the border of the substrate is smaller than 48.12 mm and greater than or equal to 0.3 mm.Type: ApplicationFiled: February 7, 2014Publication date: August 14, 2014Applicants: WINTEK CORPORATION, Wintek (China) Technology Ltd.Inventors: Kuan-Yu Chu, Chun-Cheng Huang, Chiu-Mei Liu, Ming-Wu Chen, Chin-Pei Hwang, Chen-Fu Huang, Yu-Ching Wang
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Publication number: 20140184952Abstract: A touch panel, having a peripheral region, includes a first substrate, a plurality of first conductive series, a plurality of first outer traces, and an outer device. The first conductive series are disposed on the first substrate and extend along a first direction. The first outer traces are disposed in the peripheral region. Two ends of each of the first outer traces are respectively connected to two ends of the corresponding first conductive series. The first outer traces connected to the each of the first conductive series extend to a connection region within the peripheral region and include discontinuous sections within the connection region. The outer device is disposed in the peripheral region and is electrically connected to the first outer traces. Each of the first outer traces, each corresponding first conductive series, and the outer device in the connection region constitute a closed conductive path on the first substrate.Type: ApplicationFiled: December 27, 2013Publication date: July 3, 2014Applicant: WINTEK CORPORATIONInventors: Kuan-Yu Chu, Chun-Cheng Huang, Chen-Fu Huang, Yu-Ching Wang, Chin-Pei Hwang, Ming-Wu Chen, Chiu-Mei Liu, Yan-Jun Lin, Chia-Hung Liu
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Publication number: 20140184950Abstract: A touch panel, having a peripheral region, includes a first substrate, a touch-sensing structure, first outer traces, a first ground wire and an outer device. The first outer trace is electrically connected to the touch-sensing structure. The first outer traces extend to a connection region in the peripheral region. The first ground wire extends to the connection region, and the first ground wire has at least one discontinuous section in the connection region. The outer device is electrically connected to the first ground wire and the first outer traces in the connection region. The outer device electrically connects two ends of the discontinuous section of the first ground wire in the connection region, and the two ends of the discontinuous section of the first ground wire are electrically connected via the outer device.Type: ApplicationFiled: December 26, 2013Publication date: July 3, 2014Applicant: WINTEK CORPORATIONInventors: Kuan-Yu Chu, Chun-Cheng Huang, Chen-Fu Huang, Yu-Ching Wang, Chin-Pei Hwang, Ming-Wu Chen, Chiu-Mei Liu, Yan-Jun Lin, Chia-Hung Liu, Wen-Chun Wang, Yu-Hung Chang, Lo-Hsien Tsai
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Publication number: 20140160708Abstract: A lead structure disposed on a substrate is provided. The substrate includes a display area disposed with a device and a peripheral area disposed with a lead structure including first pads, a second pad, first traces and a second trace. The first traces are connected to the device. Each first trace has a first linear portion and a first bonding portion connected together. Each first trace is electrically connected to one of the first pads through the first bonding portion. The second trace has a second linear portion and a second bonding portion connected together. The second trace is electrically connected to the second pad through the second bonding portion. A width of the first linear portion is smaller than a width of the first bonding portion, and a width of the second linear portion is smaller than a width of the second bonding portion.Type: ApplicationFiled: December 12, 2013Publication date: June 12, 2014Applicant: WINTEK CORPORATIONInventors: Kuan-Yu Chu, Chen-Fu Huang, Chiu-Mei Liu, Ming-Wu Chen, Chin-Pei Hwang, Chun-Cheng Huang, Yu-Ching Wang, Chung-Hsien Li, Kuo-Hsing Chen, Yu-Ting Chen, Chen-Hao Su
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Patent number: 7598157Abstract: A wafer stacked on a mounting layer is safely diced. The mounting layer has holes partially corresponding to chips on the wafer. Thus, chips obtained after dicing the wafer can be safely removed from the mounting tape. An amount of the mounting tape used can be reduced. And a production cost can be lowered as well.Type: GrantFiled: May 14, 2007Date of Patent: October 6, 2009Assignee: Atomic Energy Countil-Institute of Nuclear Energy ResearchInventors: Chih-Hung Wu, Chieh Cheng, Kai-Sheng Chang, Kuan-Yu Chu