Patents by Inventor Yunchao ZHANG
Yunchao ZHANG 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: 11264888Abstract: System and method for protecting a power converter. An example system controller for protecting a power converter includes a signal generator, a comparator, and a modulation and drive component. The signal generator is configured to generate a threshold signal. The comparator is configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter. The modulation and drive component is coupled to the signal generator.Type: GrantFiled: December 17, 2018Date of Patent: March 1, 2022Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Chao Yao, Yunchao Zhang, Yuan Lin, Zhiqiang Sun, Lieyi Fang
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Publication number: 20220058427Abstract: An image parsing method includes obtaining feature information of an initial image, parsing first feature information in the feature information using a first channel to obtain a first prediction result, parsing second feature information in the feature information using a second channel to obtain a second prediction result, where a size of the first feature information meets a first size range, a size of the second feature information meets a second size range, and the first size range is less than the second size range, and outputting the first prediction result and the second prediction result as a parsing result of the initial image.Type: ApplicationFiled: November 26, 2019Publication date: February 24, 2022Inventors: Ziluan Liu, Shuailin Lv, Yunchao Zhang, Chao Qin, Yao Sun
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Publication number: 20220045540Abstract: System controller and method for changing an input power and/or an output power of a charging system. For example, a system controller for changing an input power of a charging system that is configured to receive an input voltage and charge a device includes: a first controller terminal configured to receive a first voltage indicating a temperature; and a second controller terminal configured to output a second voltage to affect the input power of the charging system; wherein the system controller is further configured to, if the first voltage indicates that the temperature is higher than a temperature threshold: in response to the temperature increasing, decrease the input power of the charging system; and in response to the temperature decreasing, increase the input power of the charging system.Type: ApplicationFiled: August 6, 2021Publication date: February 10, 2022Inventors: Yunchao Zhang, Chao Yao
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Publication number: 20220045616Abstract: Systems and methods for voltage compensation based on load conditions in power converters. For example, a system controller for regulating a power converter includes a first controller terminal; a second controller terminal; and a compensation current generator. The compensation current generator is configured to receive an input signal through the first controller terminal. The input signal indicates a first current flowing through a primary winding of a power converter. The compensation current generator is configured to receive a demagnetization signal related to a demagnetization period of the power converter and associated with an auxiliary winding of the power converter. The compensation current generator is configured to generate a compensation current based at least in part on the input signal and the demagnetization signal. The compensation current generator is connected to a resistor. The resistor is configured to generate a compensation voltage based at least in part on the compensation current.Type: ApplicationFiled: October 22, 2021Publication date: February 10, 2022Inventors: WUPING LIN, YUNCHAO ZHANG, JIANFENG HUANG, LIEYI FANG
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Publication number: 20220014108Abstract: Controller and method for charging one or more loads. For example, the controller for charging one or more loads includes: a controller terminal configured to be biased at a first voltage related to a second voltage of a secondary winding of a power converter, the power converter further including a primary winding coupled to the secondary winding, the power converter being configured to, if the power converter is not unplugged from a voltage supply for an AC input voltage, receive the AC input voltage represented by the second voltage and output an output power to the one or more loads; and a voltage detector configured to: process information associated with the first voltage; and determine whether the AC input voltage is in a first voltage state or in a second voltage state based at least in part on the first voltage.Type: ApplicationFiled: July 8, 2021Publication date: January 13, 2022Inventors: Yunchao Zhang, Chao Yao
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Patent number: 11190106Abstract: Systems and methods for voltage compensation based on load conditions in power converters. For example, a system controller for regulating a power converter includes a first controller terminal; a second controller terminal; and a compensation current generator. The compensation current generator is configured to receive an input signal through the first controller terminal. The input signal indicates a first current flowing through a primary winding of a power converter. The compensation current generator is configured to receive a demagnetization signal related to a demagnetization period of the power converter and associated with an auxiliary winding of the power converter. The compensation current generator is configured to generate a compensation current based at least in part on the input signal and the demagnetization signal. The compensation current generator is connected to a resistor. The resistor is configured to generate a compensation voltage based at least in part on the compensation current.Type: GrantFiled: February 14, 2019Date of Patent: November 30, 2021Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Wuping Lin, Yunchao Zhang, Jianfeng Huang, Lieyi Fang
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Patent number: 11158057Abstract: A method for detecting a document edge is provided. The method includes: obtaining multi-color channel data of each pixel in a color image (103), where the multi-color channel data includes two-dimensional coordinate values of the pixel and a value of the pixel on each color channel; performing line detection on the multi-color channel data of each pixel in the color image (105); and detecting a quadrilateral based on preset condition and some or all of straight lines obtained by performing the line detection (107). According to the foregoing method, a success rate of detecting a document edge can be increased.Type: GrantFiled: December 30, 2016Date of Patent: October 26, 2021Assignee: Huawei Technologies Co., Ltd.Inventors: Yunchao Zhang, Wenmei Gao
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Publication number: 20210282240Abstract: System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.Type: ApplicationFiled: May 24, 2021Publication date: September 9, 2021Inventors: Jun Zhou, Yunchao Zhang, Lieyi Fang
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Patent number: 11114933Abstract: System and method for protecting a power converter. An example system controller for protecting a power converter includes a signal generator, a comparator, and a modulation and drive component. The signal generator is configured to generate a threshold signal. The comparator is configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter. The modulation and drive component is coupled to the signal generator.Type: GrantFiled: March 6, 2020Date of Patent: September 7, 2021Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Chao Yao, Yunchao Zhang, Yuan Lin, Zhiqiang Sun, Lieyi Fang
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Patent number: 11074679Abstract: A method includes photographing a first image, where the first image comprises a document. A first area of the document is obscured by a first obstruction. The method further includes determining a location of the first area based on depth data. The method further includes photographing a second image. The method further includes restoring the obstructed information in the first area based on the second image. The method further includes displaying a third image, wherein the third image comprises the document and the first obstruction s removed from the first area of the document.Type: GrantFiled: February 6, 2017Date of Patent: July 27, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yahui Wang, Xin Chen, Yunchao Zhang
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Patent number: 11051379Abstract: System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.Type: GrantFiled: March 20, 2019Date of Patent: June 29, 2021Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jun Zhou, Yunchao Zhang, Lieyi Fang
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Publication number: 20210168279Abstract: An image correction terminal provided starts a camera, to enter a default shooting mode; the terminal previews a photographed object, to obtain a preview image; the terminal determines, based on the preview image, whether the photographed object is of a document type; and the terminal corrects a photographed object image when the photographed object is of the document type, where the photographed object image is an image obtained after the photographed object is photographed. As a result, the terminal can effectively detect a scene type, and avoid system power consumption caused due to frequent detection of a type of the photographed object.Type: ApplicationFiled: April 19, 2017Publication date: June 3, 2021Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Wenmei GAO, Guowei OUYANG, Yunchao ZHANG
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Publication number: 20210096601Abstract: An electronic device includes a transparent cover and a flexible display screen. The transparent cover has a transparent cover having a fixed shape and including a plate-shape flat surface and a sidewall, the sidewall being formed by extending an edge of the flat surface away from the flat surface, the sidewall having a curved structure, and the sidewall and the flat surface forming an inverted structure; and a flexible display screen being fitted to an inner surface of the transparent cover, a display output surface of the flexible display screen facing the transparent cover, the flexible display screen including a non-deformable portion and a deformable portion, the non-deformable portion being fitted to the flat surface, and the deformable portion being fitted to the sidewall.Type: ApplicationFiled: September 28, 2020Publication date: April 1, 2021Inventors: Zhi CHEN, Xiaojing YUAN, Zhaokao TIAN, Yunchao ZHANG, Jun LIANG
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Publication number: 20210100081Abstract: System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.Type: ApplicationFiled: December 15, 2020Publication date: April 1, 2021Inventors: JUN ZHOU, Yunchao Zhang, Lieyi Fang
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Patent number: 10904974Abstract: System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.Type: GrantFiled: March 20, 2019Date of Patent: January 26, 2021Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jun Zhou, Yunchao Zhang, Lieyi Fang
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Publication number: 20210014420Abstract: An intelligent assistant control method is provided: starting, by a terminal device, a lens; displaying, by the terminal device, a preview interface on a display screen, where the preview interface includes a to-be-photographed object; and if the terminal device determines that the preview interface has been stably displayed for preset duration, displaying, by the terminal device, first prompt information of a photographing mode in the preview interface, where the first prompt information is used to recommend a first photographing mode to a user, and the first photographing mode is determined by the terminal device based on scene information of the to-be-photographed object.Type: ApplicationFiled: March 26, 2018Publication date: January 14, 2021Inventors: Lei SONG, Xin GUO, Xiaomeng CHEN, Yunchao ZHANG, Xin CHEN
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Publication number: 20200389131Abstract: System and method for integrating an input signal to generate an output signal. The system includes a first integrator configured to receive the input signal and generate an integrated signal based on at least information associated with the input signal, a second integrator configured to receive the integrated signal and generate the output signal based on at least information associated with the integrated signal, and a compensation capacitor coupled to the first integrator and the second integrator. The first integrator includes a first integration capacitor and a first operational amplifier including a first input terminal and a first output terminal, the first integration capacitor being coupled between the first input terminal and the first output terminal. The second integrator includes a second integration capacitor and a second operational amplifier including a second input terminal and a second output terminal.Type: ApplicationFiled: June 29, 2020Publication date: December 10, 2020Inventors: TINGZHI YUAN, YUNCHAO ZHANG, ZHIQIANG SUN, LIEYI FANG
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Publication number: 20200334789Abstract: An image processing method and a device, where the image processing method is performed by a terminal having a digital zoom function, and the method includes determining a target zoom magnification based on a selection input of a user, collecting a to-be-processed image, and processing the to-be-processed image using a target super-resolution convolutional neural network model to obtain a processed image corresponding to the target zoom magnification, where the target super-resolution convolutional neural network model is obtained by training a super-resolution convolutional neural network model using a high-definition training image, a low-definition training image, and a mask image.Type: ApplicationFiled: December 1, 2017Publication date: October 22, 2020Applicant: Huawei Technologies Co., Ltd.Inventors: Yunchao Zhang, Shuai Chen, Zhiping Jia, Lei Miao
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Patent number: 10811955Abstract: System and method for protecting a power converter. An example system controller for protecting a power converter includes a signal generator, a comparator, and a modulation and drive component. The signal generator is configured to generate a threshold signal. The comparator is configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter. The modulation and drive component is coupled to the signal generator.Type: GrantFiled: May 16, 2019Date of Patent: October 20, 2020Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Chao Yao, Yunchao Zhang, Yuan Lin, Zhiqiang Sun, Lieyi Fang
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Patent number: 10790751Abstract: System and method for regulating a power conversion system. An example system controller includes a signal processing component and a driving component. The signal processing component is configured to receive a feedback signal associated with an output signal of a power conversion system and generate a processed signal based on at least information associated with the feedback signal. The driving component is configured to generate a drive signal based on at least information associated with the processed signal and output the drive signal to a switch in order to affect a primary current flowing through a primary winding, the drive signal being associated with a demagnetization period corresponding to a demagnetization process of the power conversion system. The signal processing component is further configured to, sample and hold the feedback signal a plurality of times during the demagnetization period to generate a plurality of sampled and held signals.Type: GrantFiled: June 5, 2019Date of Patent: September 29, 2020Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yunchao Zhang, Lieyi Fang