Patents by Inventor CHAO AN
CHAO AN 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: 20210219198Abstract: In an example, a wireless client station detects a first signal emitted by a first wireless access point and a second signal emitted by a second wireless access point. The wireless client station extracts a first set of data indicative of the signal strength and network congestion of the first wireless access point and a second set of data indicative of the signal strength and network congestion of the second wireless access point. The wireless client station then computes a first performance metric of first wireless access point, based on the first set of data, and a second performance metric of the second wireless access point, based on the second set of data. The wireless client station determines that the first performance metric is greater than the second performance metric and initiates a connection to the first wireless access point in response.Type: ApplicationFiled: February 6, 2017Publication date: July 15, 2021Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: I-Chen LIN, Robin LIN, Han-Kuang CHANG, Danny Farnyih MENG, Isaac LAGNADO, Chao-An CHEN
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Publication number: 20210151871Abstract: An antenna module includes a grounding conductor, a first radiator, a second radiator, and a grounding component. The grounding conductor has a grounding function. The first radiator includes a first feeding portion and a first radiating portion. The second radiator includes a second feeding portion and a second radiating portion. The grounding component is located between the first radiator and the second radiator, and includes a first coupling portion, a second coupling portion, a capacitor, and a first grounding portion. The first radiating portion is spaced apart from the first coupling portion and the second radiating portion is spaced apart from the second coupling portion. The capacitor is located among the first coupling portion, the second coupling portion, and the first grounding portion. The first grounding portion is connected to the grounding conductor.Type: ApplicationFiled: December 12, 2019Publication date: May 20, 2021Inventor: Chao-An LYU
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Publication number: 20210151885Abstract: A multi-band antenna includes a grounding conductor, a first radiator, and a second radiator. The grounding conductor has a grounding function. The first radiator has a first radiating portion, a second radiating portion, and a feeding portion configured to connect to a signal source. The second radiator includes a third radiating portion, a fourth radiating portion, and a first grounding portion. A length of the third radiating portion or a length of the fourth radiating portion is longer than lengths of first radiating portion and the second radiating portion combined, and the third radiating portion or the fourth radiating portion is radiationally coupled with the first radiating portion and the second radiating portion.Type: ApplicationFiled: December 12, 2019Publication date: May 20, 2021Inventor: Chao-An LYU
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Publication number: 20210071923Abstract: A control method for an air conditioner including a compressor and an outdoor unit, where the control method includes: obtaining a suction temperature of the outdoor unit and selectively adjusting the frequency of the compressor according to the suction temperature of the outdoor unit. The method can adjust the operating frequency of the compressor according to the temperature interval in which the suction temperature of the outdoor unit is located, to avoid the freezing of an indoor unit, the outdoor unit and an unit connecting tube of the air conditioner, thereby effectively solving the problem that the indoor unit, the outdoor unit and the unit connecting tube of the air conditioner are easy to freeze, and the stability and reliability of the air conditioner operation are also improved.Type: ApplicationFiled: October 18, 2018Publication date: March 11, 2021Applicants: Qingdao Haier Air-conditioning Electronic Co., Ltd, Haier Smart Home Co., Ltd.Inventors: Chao AN, Chao GU
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Publication number: 20210071924Abstract: The air conditioner includes a compressor and an indoor unit. The method includes: obtaining a coil temperature of the indoor unit and selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit. According to the method, the operating frequency of the compressor is adjusted by determining a temperature interval in which the coil temperature of the indoor unit is, so as to avoid the icing of the indoor unit of the air conditioner, thereby effectively solving the icing problem of the indoor unit of the air conditioner, and also improving the operation stability and reliability of the air conditioner.Type: ApplicationFiled: October 18, 2018Publication date: March 11, 2021Applicants: Qingdao Haier Air-conditioning Electronic Co., Ltd, Haier Smart Home Co., Ltd.Inventors: Chao AN, Chao GU
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Publication number: 20200302060Abstract: Examples techniques to enable access to a capturing device of a computing device by a basic input and output system (BIOS) of the computing device are described. In an example, an authentication parameter is obtained, in response to a request to access the capturing device. An access to the capturing device is enabled based on a verification of the authentication parameter.Type: ApplicationFiled: December 14, 2017Publication date: September 24, 2020Applicant: Hewlett-Packard Development Company, L.P.Inventors: Pei-Yi Chiang, Chung-Chun Chen, Chao-An Chen
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Patent number: 10446559Abstract: A method of fabricating a DRAM includes providing a substrate. Later, a first mask layer is formed to cover the substrate. The first mask layer includes a hydrogen-containing silicon nitride layer and a silicon oxide layer. The hydrogen-containing silicon nitride layer has the chemical formula: SixNyHz, wherein x is between 4 and 8, y is between 3.5 and 9.5, and z equals 1. After that, the first mask layer is patterned to form a first patterned mask layer. Next, the substrate is etched by taking the first patterned mask layer as a mask to form a word line trench. Subsequently, the first patterned mask layer is removed entirely. Finally, a word line is formed in the word line trench.Type: GrantFiled: August 2, 2018Date of Patent: October 15, 2019Assignees: UNITED MICROELECTRONICS CORP., Fujian Jinhua Integrated Circuit Co., Ltd.Inventors: Tzu-Chin Wu, Chao-An Liu, Ching-Hsiang Chang, Yi-Wei Chen
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Publication number: 20190109139Abstract: A method of fabricating a DRAM includes providing a substrate. Later, a first mask layer is formed to cover the substrate. The first mask layer includes a hydrogen-containing silicon nitride layer and a silicon oxide layer. The hydrogen-containing silicon nitride layer has the chemical formula: SixNyHz, wherein x is between 4 and 8, y is between 3.5 and 9.5, and z equals 1. After that, the first mask layer is patterned to form a first patterned mask layer. Next, the substrate is etched by taking the first patterned mask layer as a mask to form a word line trench. Subsequently, the first patterned mask layer is removed entirely. Finally, a word line is formed in the word line trench.Type: ApplicationFiled: August 2, 2018Publication date: April 11, 2019Inventors: Tzu-Chin Wu, Chao-An Liu, Ching-Hsiang Chang, Yi-Wei Chen
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Publication number: 20180275640Abstract: A passive compliance mechanism includes a fixing member, a base and a stiffness adjustment assembly. The base is installed on the fixing member, and includes two notches and an elastic slice. A first end of the elastic slice is connected with the base. A second end of the elastic slice is located near the outer periphery of the fixing member. The stiffness adjustment assembly includes a linear guide, a sliding block and two stopping blocks. The linear guide is installed on the fixing member. The sliding block is movably installed on the linear guide. The two stopping blocks are disposed on the sliding block and synchronously moved with the sliding block. The two stopping blocks are contacted with two opposite sides of the elastic slice to clamp the elastic slice. A stiffness of the base is adjustable according to a clamped position of the elastic slice.Type: ApplicationFiled: September 5, 2017Publication date: September 27, 2018Inventors: Michael Schweigler, Chih-Cheng Peng, Chao-An Pao, Tzu-Min Yi, Wei-Ying Chu
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Patent number: 9785162Abstract: An LDO with high efficiency receives an input voltage from an input power line and outputs an output voltage at an output power line. The LDO includes a first active device, a second active device, an operational amplifier and a protection circuit. The first and second active devices are connected in series between the input and output power lines via a connecting node. The operational amplifier controls the second active device according to the output voltage and a core power voltage of a core power line to cause the output voltage to stabilize at a target voltage value. The protection circuit is connected to the input and output power lines, the connecting node and a control node of the first active device, and controls a voltage of the connecting node and the control node of the first active device according to the input and output voltages.Type: GrantFiled: March 23, 2016Date of Patent: October 10, 2017Assignee: MStar Semiconductor, Inc.Inventors: Chun-Chia Chen, Chao-An Chen, Jian-Feng Shiu, Kai-Fei Chang
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Patent number: 9601587Abstract: A semiconductor device includes a gate stack overlying a substrate. The semiconductor device further includes a spacer on sidewalls of the gate stack, where a top surface of the spacer is above a top surface of the gate stack. Additionally, the semiconductor device includes a protection layer overlying the gate stack and filling at least a portion of a space surrounded by the spacer above the top surface of the gate stack. Furthermore, the semiconductor device includes a contact hole over the spacer, where the contact hole extends over the gate stack, and where a sidewall of the contact hole has a step-wise shape.Type: GrantFiled: January 23, 2015Date of Patent: March 21, 2017Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Sey-Ping Sun, Tsung-Lin Lee, Chin-Hsiang Lin, Chih-Hao Chang, Chen-Nan Yeh, Chao-An Jong
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Patent number: 9461362Abstract: A multi-band antenna and electronic device are provided. The multi-frequency antenna includes a feeding portion, a shorting portion, a radiating portion and a loop radiating portion. One end of the feeding portion is electrically connected to a signal source. One end of the shorting portion is electrically connected to a ground plane. The radiating portion is electrically connected to another end of the shorting portion and another end of the feeding portion. The loop radiating portion is electrically connected to the radiating portion.Type: GrantFiled: November 4, 2014Date of Patent: October 4, 2016Assignees: UNIVERSAL SCIENTIFIC INDUSTRIAL (SHANGHAI) CO., LTD., UNIVERSAL GLOBAL SCIENTIFIC INDUSTRIAL CO., LTD.Inventors: Chao-An Lyu, Jui-Chih Chien, Hung-Wei Chiu
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Publication number: 20160282888Abstract: An LDO with high efficiency receives an input voltage from an input power line and outputs an output voltage at an output power line. The LDO includes a first active device, a second active device, an operational amplifier and a protection circuit. The first and second active devices are connected in series between the input and output power lines via a connecting node. The operational amplifier controls the second active device according to the output voltage and a core power voltage of a core power line to cause the output voltage to stabilize at a target voltage value. The protection circuit is connected to the input and output power lines, the connecting node and a control node of the first active device, and controls a voltage of the connecting node and the control node of the first active device according to the input and output voltages.Type: ApplicationFiled: March 23, 2016Publication date: September 29, 2016Inventors: Chun-Chia CHEN, Chao-An CHEN, Jian-Feng SHIU, Kai-Fei CHANG
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Patent number: 9318184Abstract: A signal receiver includes a current source providing a current having a current value, a pair of active input devices, and a pair of resistors. Each active input device includes a control node, a first conduction node, and a second conduction node. One of the control nodes receives an input signal. The first conduction nodes are connected to each other and receive the current. One of the second conduction nodes serves as an output node. The active input devices output an output signal to a core circuit according to the current and the input signal. Each resistor has a resistance value. A target voltage value is determined according to the resistance value and the current value, such that a voltage swing of the output signal is limited within the target voltage value, and an operating voltage of the core circuit is substantially equal to the target voltage value.Type: GrantFiled: July 24, 2014Date of Patent: April 19, 2016Assignee: MSTAR SEMICONDUCTOR, INC.Inventors: Eer-Wen Tyan, Yu-Chieh Hung, Jian-Feng Shiu, Chao-An Chen
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Patent number: 9191182Abstract: A signal transmission method suitable for a signal transmitter includes: providing a plurality of clock signals with different phases, selecting some of the clock signals as a plurality of intermediate signals; transmitting the intermediate signals to a signal output circuit via a clock distribution network; selecting one of the intermediate signals as a reference clock of the signal output circuit to output data.Type: GrantFiled: January 7, 2015Date of Patent: November 17, 2015Assignee: MStar Semiconductor, Inc.Inventors: Hsian-Feng Liu, Chun-Chia Chen, Kai-Fei Chang, Chao-An Chen
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Publication number: 20150325915Abstract: A multi-band antenna and electronic device are provided. The multi-frequency antenna includes a feeding portion, a shorting portion, a radiating portion and a loop radiating portion. One end of the feeding portion is electrically connected to a signal source. One end of the shorting portion is electrically connected to a ground plane. The radiating portion is electrically connected to another end of the shorting portion and another end of the feeding portion. The loop radiating portion is electrically connected to the radiating portion.Type: ApplicationFiled: November 4, 2014Publication date: November 12, 2015Inventors: CHAO-AN LYU, JUI-CHIH CHIEN, HUNG-WEI CHIU
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Patent number: 9118318Abstract: A driving circuit includes a first driving module, configured to operate at a first operating voltage in a first mode and configured to be deactivated in a second mode; and a second driving module, wherein at least part of the second driving module operates at a protection voltage in the first mode and operates at a second operating voltage in the second mode, wherein the second operating voltage and the protection voltage are lower than the first operating voltage.Type: GrantFiled: March 18, 2015Date of Patent: August 25, 2015Assignee: MStar Semiconductor, Inc.Inventors: Hsian-Feng Liu, Eer-Wen Tyan, Chao-An Chen
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Publication number: 20150195080Abstract: A signal transmission method suitable for a signal transmitter includes: providing a plurality of clock signals with different phases, selecting some of the clock signals as a plurality of intermediate signals; transmitting the intermediate signals to a signal output circuit via a clock distribution network; selecting one of the intermediate signals as a reference clock of the signal output circuit to output data.Type: ApplicationFiled: January 7, 2015Publication date: July 9, 2015Inventors: Hsian-Feng Liu, Chun-Chia Chen, Kai-Fei Chang, Chao-An Chen
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Publication number: 20150194958Abstract: A driving circuit includes a first driving module, configured to operate at a first operating voltage in a first mode and configured to be deactivated in a second mode; and a second driving module, wherein at least part of the second driving module operates at a protection voltage in the first mode and operates at a second operating voltage in the second mode, wherein the second operating voltage and the protection voltage are lower than the first operating voltage.Type: ApplicationFiled: March 18, 2015Publication date: July 9, 2015Inventors: Hsian-Feng Liu, Eer-Wen Tyan, Chao-An Chen
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Publication number: 20150129990Abstract: A semiconductor device includes a gate stack overlying a substrate. The semiconductor device further includes a spacer on sidewalls of the gate stack, where a top surface of the spacer is above a top surface of the gate stack. Additionally, the semiconductor device includes a protection layer overlying the gate stack and filling at least a portion of a space surrounded by the spacer above the top surface of the gate stack. Furthermore, the semiconductor device includes a contact hole over the spacer, where the contact hole extends over the gate stack, and where a sidewall of the contact hole has a step-wise shape.Type: ApplicationFiled: January 23, 2015Publication date: May 14, 2015Inventors: Sey-Ping SUN, Tsung-Lin LEE, Chin-Hsiang LIN, Chih-Hao CHANG, Chen-Nan YEH, Chao-An JONG