Patents by Inventor Rui Lai

Rui Lai 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).

  • Patent number: 11656644
    Abstract: A control circuit of a power converter includes a first sensing circuit, a reference voltage generation circuit, an error amplifying circuit and a PWM circuit. The first sensing circuit, coupled to a first output circuit, provides a first current sensing signal. The reference voltage generation circuit, coupled to the first sensing circuit, provides a reference voltage according to the first current sensing signal. The error amplifying circuit, coupled to the reference voltage generation circuit, receives the reference voltage and an output feedback voltage of the power converter to provide an error amplifying signal. The PWM circuit, coupled between the error amplifying circuit and the first output circuit, receives the error amplifying signal and provides a control signal to control the first output circuit. The reference voltage generation circuit further receives the error amplifying signal and adjusts the reference voltage it generates according to the error amplifying signal.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: May 23, 2023
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventors: Wei-Hsiu Hung, Min-Rui Lai, Chih-Lien Chang
  • Patent number: 11616431
    Abstract: A control circuit of a power converter includes a sensing circuit, a ramp signal generation circuit and a PWM circuit. The sensing circuit, coupled to an output circuit, provides a current sensing signal. The ramp signal generation circuit includes a transient circuit and a signal generation circuit. The transient circuit receives the current sensing signal and generates a variable reference voltage. The signal generation circuit provides a ramp signal according to the variable reference voltage. The PWM circuit provides a PWM signal to the output circuit according to the ramp signal. When current sourcing occurs, it continues for a first default time. A transient state during current sourcing continues for a second default time less than first default time. The variable reference voltage is changed from a default value to an adjusted value during the second default time and restored to the default value after the second default time.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: March 28, 2023
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventors: Chih-Lien Chang, Wei-Hsiu Hung, Chun-Ming Lu, Min-Rui Lai
  • Publication number: 20220149734
    Abstract: A control circuit of a power converter includes a sensing circuit, a ramp signal generation circuit and a PWM circuit. The sensing circuit, coupled to an output circuit, provides a current sensing signal. The ramp signal generation circuit includes a transient circuit and a signal generation circuit. The transient circuit receives the current sensing signal and generates a variable reference voltage. The signal generation circuit provides a ramp signal according to the variable reference voltage. The PWM circuit provides a PWM signal to the output circuit according to the ramp signal. When current sourcing occurs, it continues for a first default time. A transient state during current sourcing continues for a second default time less than first default time. The variable reference voltage is changed from a default value to an adjusted value during the second default time and restored to the default value after the second default time.
    Type: Application
    Filed: October 27, 2021
    Publication date: May 12, 2022
    Inventors: Chih-Lien CHANG, Wei-Hsiu HUNG, Chun-Ming LU, Min-Rui LAI
  • Publication number: 20220050487
    Abstract: A control circuit of a power converter includes a first sensing circuit, a reference voltage generation circuit, an error amplifying circuit and a PWM circuit. The first sensing circuit, coupled to a first output circuit, provides a first current sensing signal. The reference voltage generation circuit, coupled to the first sensing circuit, provides a reference voltage according to the first current sensing signal. The error amplifying circuit, coupled to the reference voltage generation circuit, receives the reference voltage and an output feedback voltage of the power converter to provide an error amplifying signal. The PWM circuit, coupled between the error amplifying circuit and the first output circuit, receives the error amplifying signal and provides a control signal to control the first output circuit. The reference voltage generation circuit further receives the error amplifying signal and adjusts the reference voltage it generates according to the error amplifying signal.
    Type: Application
    Filed: August 9, 2021
    Publication date: February 17, 2022
    Inventors: Wei-Hsiu HUNG, Min-Rui LAI, Chih-Lien CHANG
  • Patent number: 11066088
    Abstract: A detection and positioning method for a train water injection port includes: acquiring train water injection port video images, and performing threshold segmentation on the train water injection port video images to obtain binarized train water injection port video images; processing the binarized train water injection port video images and matching the processed binarized train water injection port video images with a train water injection port template image; detecting a position of the water injection port in the train water injection port video image and comparing the position with a pre-set position range where the water injection port is located; and if the position and the pre-set position range have been matched, then transmitting a matching valid signal to a mechanical device control module to control a mechanical device to move or stop and start or stop water injection.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: July 20, 2021
    Assignee: XIDIAN UNIVERSITY
    Inventors: Huixin Zhou, Pei Xiang, Baokai Deng, Yue Yu, Lixin Guo, Dong Zhao, Hanlin Qin, Bingjian Wang, Jiangluqi Song, Huan Li, Bo Yao, Rui Lai, Xiuping Jia, Jun Zhou
  • Patent number: 11055574
    Abstract: A feature fusion and dense connection-based method for infrared plane object detection includes: constructing an infrared image dataset containing an object to be recognized, calibrating a position and class of the object to be recognized in the infrared image dataset, and obtaining an original known label image; dividing the infrared image dataset into a training set and a validation set; performing image enhancement preprocessing on images in the training set, performing feature extraction and feature fusion, and obtaining classification results and bounding boxes through a regression network; calculating a loss function according to the classification results and the bounding boxes in combination with the original known label image, and updating parameter values of a convolutional neural network; repeating the steps to iteratively update the parameters of the convolutional neural network; and processing images in the validation set through the parameters to obtain a final object detection result map.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: July 6, 2021
    Assignee: XIDIAN UNIVERSITY
    Inventors: Huixin Zhou, Jiajia Zhang, Yuanbin Shi, Dong Zhao, Lixin Guo, Hanlin Qin, Bingjian Wang, Rui Lai, Huan Li, Jiangluqi Song, Bo Yao, Yue Yu, Xiuping Jia, Jun Zhou
  • Publication number: 20210179154
    Abstract: A detection and positioning method for a train water injection port includes: acquiring train water injection port video images, and performing threshold segmentation on the train water injection port video images to obtain binarized train water injection port video images; processing the binarized train water injection port video images and matching the processed binarized train water injection port video images with a train water injection port template image; detecting a position of the water injection port in the train water injection port video image and comparing the position with a pre-set position range where the water injection port is located; and if the position and the pre-set position range have been matched, then transmitting a matching valid signal to a mechanical device control module to control a mechanical device to move or stop and start or stop water injection.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 17, 2021
    Applicant: XIDIAN UNIVERSITY
    Inventors: Huixin ZHOU, Pei XIANG, Baokai DENG, Yue YU, Lixin GUO, Dong ZHAO, Hanlin QIN, Bingjian WANG, Jiangluqi SONG, Huan LI, Bo YAO, Rui LAI, Xiuping JIA, Jun ZHOU
  • Publication number: 20210174149
    Abstract: A feature fusion and dense connection-based method for infrared plane object detection includes: constructing an infrared image dataset containing an object to be recognized, calibrating a position and class of the object to be recognized in the infrared image dataset, and obtaining an original known label image; dividing the infrared image dataset into a training set and a validation set; performing image enhancement preprocessing on images in the training set, performing feature extraction and feature fusion, and obtaining classification results and bounding boxes through a regression network; calculating a loss function according to the classification results and the bounding boxes in combination with the original known label image, and updating parameter values of a convolutional neural network; repeating the steps to iteratively update the parameters of the convolutional neural network; and processing images in the validation set through the parameters to obtain a final object detection result map.
    Type: Application
    Filed: November 20, 2018
    Publication date: June 10, 2021
    Applicant: XIDIAN UNIVERSITY
    Inventors: Huixin ZHOU, Jiajia ZHANG, Yuanbin SHI, Dong ZHAO, Lixin GUO, Hanlin QIN, Bingjian WANG, Rui LAI, Huan LI, Jiangluqi SONG, Bo YAO, Yue YU, Xiuping JIA, Jun ZHOU
  • Patent number: 10879794
    Abstract: A dc-dc controller is provided. The dc-dc controller includes a current sensing pin, a zero-current comparator, a comparison circuit and a threshold adjustment circuit. The current sensing pin is coupled to an output stage to receive a current sensing signal related to the output current. The zero-current comparator is coupled to the current sensing pin, and receives the current sensing signal and a first preset value to provide a zero-current signal. The comparison circuit is coupled to the zero-current comparator and the current sensing pin, and compares the current sensing signal with a second preset value to provide an adjustment signal. The threshold adjustment circuit is coupled to the comparison circuit and the zero-current comparator, and generates the first preset value according to the adjustment signal.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: December 29, 2020
    Assignee: uPI Semiconductor Corp.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Patent number: 10637454
    Abstract: A pulse-width modulation (PWM) controller including an output pin, a temporary voltage generation circuit and a tri-state voltage generation circuit is disclosed. The temporary voltage generation circuit includes a voltage-dividing unit and a control unit. The voltage-dividing unit is coupled to the output pin and the control unit respectively. The control unit receives an enable signal and a PWM signal. The tri-state voltage generation circuit is coupled to the temporary voltage generation circuit and the output pin and receives the enable signal, the PWM signal and a tri-state input voltage. When the PWM controller is operated in a tri-state mode, the control unit controls the voltage-dividing unit to provide a temporary voltage to the output pin according to the enable signal and PWM signal, and then the tri-state voltage generation circuit provides a tri-state voltage to the output pin according to the enable signal and PWM signal.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: April 28, 2020
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Patent number: 10587191
    Abstract: A dc-dc converting circuit and a method for controlling the same are provided. The dc-dc converting circuit includes an output stage, a mode detection circuit, a PWM signal generating circuit and a ramp signal generating circuit. The output stage provides an output voltage. The mode detection circuit provides a mode detection signal. The PWM generating circuit provides a time signal to the output stage. When the dc-dc converting circuit enters a continuous conduction mode from a discontinuous conduction mode, the ramp signal generating circuit provides a second ramp signal to the PWM signal generating circuit in a preset time according to the mode detection signal. The ramp signal generating circuit provides a first ramp signal to the PWM signal generating circuit after the preset time. A slope of the second ramp signal is greater than a slope of the first ramp signal.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: March 10, 2020
    Assignee: uPI Semiconductor Corp.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Patent number: 10574141
    Abstract: A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation controller, includes a first voltage generation unit, a second voltage generation unit, a calibration unit and a current mirror circuit. During an initial period, the first voltage generation unit and second voltage generation unit provide a first default voltage and a second default voltage respectively. The current mirror circuit includes a first current unit and a second current unit. The first current unit receives an original current. The second current unit generates a mirror current having a proportional relationship with original current. The first current unit has a first node coupled to the first voltage generation unit and a second node coupled to a third default voltage. The second current unit has a third node coupled to the second voltage generation unit and calibration unit and a fourth node coupled to calibration unit and an output terminal of error amplifier.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: February 25, 2020
    Assignee: UPI SEMICONDUCTOR CORP
    Inventors: Chih-Lien Chang, Pei-Ling Hong, Min-Rui Lai
  • Patent number: 10511228
    Abstract: A DC-DC converting controller coupled to an output stage and an external resistor network and providing a pulse-width-modulation (PWM) signal to control the output stage to provide an output voltage is disclosed. The DC-DC converting controller includes a sensing circuit, a droop current circuit, a first pin and a PWM signal control loop. The sensing circuit, coupled to the output stage, provides a sensing current. The droop current circuit, coupled to the sensing circuit, provides a droop current according to the sensing current. The first pin, coupled to the droop current circuit and external resistor network, provides the droop current to make the external resistor network provide a second reference voltage. The PWM signal control loop, coupled to the external resistor network, generates a PWM signal according to the output voltage and the second reference voltage. The droop current is reduced to a default value with a default time.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: December 17, 2019
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Publication number: 20190356223
    Abstract: A dc-dc converting circuit and a method for controlling the same are provided. The dc-dc converting circuit includes an output stage, a mode detection circuit, a PWM signal generating circuit and a ramp signal generating circuit. The output stage provides an output voltage. The mode detection circuit provides a mode detection signal. The PWM generating circuit provides a time signal to the output stage. When the dc-dc converting circuit enters a continuous conduction mode from a discontinuous conduction mode, the ramp signal generating circuit provides a second ramp signal to the PWM signal generating circuit in a preset time according to the mode detection signal. The ramp signal generating circuit provides a first ramp signal to the PWM signal generating circuit after the preset time. A slope of the second ramp signal is greater than a slope of the first ramp signal.
    Type: Application
    Filed: January 31, 2019
    Publication date: November 21, 2019
    Applicant: uPI Semiconductor Corp.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Publication number: 20190356220
    Abstract: A dc-dc controller is provided. The dc-dc controller includes a current sensing pin, a zero-current comparator, a comparison circuit and a threshold adjustment circuit. The current sensing pin is coupled to an output stage to receive a current sensing signal related to the output current. The zero-current comparator is coupled to the current sensing pin, and receives the current sensing signal and a first preset value to provide a zero-current signal. The comparison circuit is coupled to the zero-current comparator and the current sensing pin, and compares the current sensing signal with a second preset value to provide an adjustment signal. The threshold adjustment circuit is coupled to the comparison circuit and the zero-current comparator, and generates the first preset value according to the adjustment signal.
    Type: Application
    Filed: March 7, 2019
    Publication date: November 21, 2019
    Applicant: uPI Semiconductor Corp.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Publication number: 20190296639
    Abstract: A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation controller, includes a first voltage generation unit, a second voltage generation unit, a calibration unit and a current mirror circuit. During an initial period, the first voltage generation unit and second voltage generation unit provide a first default voltage and a second default voltage respectively. The current mirror circuit includes a first current unit and a second current unit. The first current unit receives an original current. The second current unit generates a mirror current having a proportional relationship with original current. The first current unit has a first node coupled to the first voltage generation unit and a second node coupled to a third default voltage. The second current unit has a third node coupled to the second voltage generation unit and calibration unit and a fourth node coupled to calibration unit and an output terminal of error amplifier.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 26, 2019
    Inventors: Chih-Lien CHANG, Pei-Ling HONG, Min-Rui LAI
  • Publication number: 20190288675
    Abstract: A pulse-width modulation (PWM) controller including an output pin, a temporary voltage generation circuit and a tri-state voltage generation circuit is disclosed. The temporary voltage generation circuit includes a voltage-dividing unit and a control unit. The voltage-dividing unit is coupled to the output pin and the control unit respectively. The control unit receives an enable signal and a PWM signal. The tri-state voltage generation circuit is coupled to the temporary voltage generation circuit and the output pin and receives the enable signal, the PWM signal and a tri-state input voltage. When the PWM controller is operated in a tri-state mode, the control unit controls the voltage-dividing unit to provide a temporary voltage to the output pin according to the enable signal and PWM signal, and then the tri-state voltage generation circuit provides a tri-state voltage to the output pin according to the enable signal and PWM signal.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 19, 2019
    Inventors: CHIH-LIEN CHANG, MIN-RUI LAI
  • Publication number: 20190245447
    Abstract: A DC-DC converting controller coupled to an output stage and an external resistor network and providing a pulse-width-modulation (PWM) signal to control the output stage to provide an output voltage is disclosed. The DC-DC converting controller includes a sensing circuit, a droop current circuit, a first pin and a PWM signal control loop. The sensing circuit, coupled to the output stage, provides a sensing current. The droop current circuit, coupled to the sensing circuit, provides a droop current according to the sensing current. The first pin, coupled to the droop current circuit and external resistor network, provides the droop current to make the external resistor network provide a second reference voltage. The PWM signal control loop, coupled to the external resistor network, generates a PWM signal according to the output voltage and the second reference voltage. The droop current is reduced to a default value with a default time.
    Type: Application
    Filed: January 28, 2019
    Publication date: August 8, 2019
    Inventors: CHIH-LIEN CHANG, MIN-RUI LAI
  • Patent number: D993028
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: July 25, 2023
    Assignee: Top Racks & Accessories Inc.
    Inventor: Rui Lai
  • Patent number: D993888
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: August 1, 2023
    Assignee: Top Racks & Accessories Inc.
    Inventor: Rui Lai