Patents by Inventor Jingquan Chen
Jingquan Chen 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: 11925067Abstract: Disclosed are a display panel and a display device. The display panel includes a base substrate including a plurality of sub-pixels, at least one of the plurality of sub-pixels including a pixel circuit; a first conductive layer located on a side, facing away from the base substrate, of a first insulating layer; a second insulating layer located on a side, facing away from the base substrate, of the first conductive layer; a second conductive layer located on a side, facing away from the base substrate, of the second insulating layer; a fourth insulating layer located on a side, facing away from the base substrate, of the second conductive layer; and a third conductive layer located on a side, facing away from the base substrate, of the fourth insulating layer, the third conductive layer including a plurality of data wires arranged at intervals.Type: GrantFiled: May 11, 2020Date of Patent: March 5, 2024Assignee: BOE Technology Group Co., Ltd.Inventors: Yang Yu, Yipeng Chen, Ling Shi, Jingquan Wang
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Publication number: 20230231477Abstract: The present application provides a controller for a switching power supply such as a DC-DC converter which provides an output voltage and an output current. The controller is configured to provide at least one control signal to operate the switching power supply to maintain the output voltage at a first reference voltage. The controller employs a load line compensator responsive to output current for adjusting the reference voltage employed by the compensator. The load line compensator employs one or either or both of a high pass filter or saturating element to provide a filtered/saturated value which is the value employed in adjusting the reference voltage.Type: ApplicationFiled: March 24, 2023Publication date: July 20, 2023Inventors: Mark Hartman, Jingquan Chen, Jeffrey D. Mincey
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Patent number: 11616435Abstract: The present application provides a controller for a switching power supply such as a DC-DC converter which provides an output voltage and an output current. The controller is configured to provide at least one control signal to operate the switching power supply to maintain the output voltage at a first reference voltage. The controller employs a load line compensator responsive to output current for adjusting the reference voltage employed by the compensator. The load line compensator employs one or either or both of a high pass filter or saturating element to provide a filtered/saturated value which is the value employed in adjusting the reference voltage.Type: GrantFiled: August 6, 2017Date of Patent: March 28, 2023Assignee: ROHM CO., LTD.Inventors: Mark Hartman, Jingquan Chen, Jeffrey D. Mincey
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Publication number: 20220418062Abstract: The present application provides an LED control system, including an LED driver chip, a thermistor independent of the LED driver chip, and a matching resistor of the thermistor, wherein different thermistors correspond to different matching resistors; the LED driver chip and the matching resistor are configured to generate corresponding LED control targets according to different thermistors; wherein the upper and lower limits of the control targets are preset by the LED driver chip regardless of the thermistor; and the slope of the change of control target over the change of temperature is fitted with the slope of the change of thermistor resistance over the change of temperature, and the upper and lower limits of the control target remains the same for different choices of thermistors. The present application also provides a corresponding LED control method.Type: ApplicationFiled: June 22, 2022Publication date: December 29, 2022Inventors: Jingquan Chen, Chen Li
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Patent number: 11469752Abstract: The present application provides a power device driver including a detection module coupled to the power device and configured to detect the state of the power device; a driving module coupled to the detection module and the power device respectively and configured to detect the power of the detection module. As a result, the power device is regulated; wherein the detection module includes a fast detection sub-module configured to detect a state of the power device within a preset time period after the input signal of the driving device is invalid, and controlling the driving module to softly turn off the power device when there is overcurrent. The present application also provides a corresponding power device driving method and electric equipment.Type: GrantFiled: April 28, 2020Date of Patent: October 11, 2022Assignee: LEN Technology LimitedInventors: Jingquan Chen, Chuan Ni, Wei Lu
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Patent number: 11245394Abstract: The present application discloses a driving device for a power device, which includes a control circuitry configured to receive at least a system switching command and a feedback signal of a power device, and to generate a pull-up strength control signal or a pull-down strength control signal according to the received signals; and a pull-up array and/or a pull-down array, coupled between the control circuitry and the power device, and configured to provide a corresponding pull-up or pull-down strength for the power device according to the pull-up or pull-down strength control signal. The present application also discloses the corresponding electric appliance and power device driving method.Type: GrantFiled: July 2, 2020Date of Patent: February 8, 2022Assignee: LEN Technology LimitedInventors: Jingquan Chen, Chuan Ni, Wei Lu
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Patent number: 11239838Abstract: This application discloses a driving device for a power device. It includes a detection module, coupled to the power device, configured to detect the overcurrent status of the power device; a drive module, respectively coupled to the detection module and the power device, configured to regulate the power device according to the detection result of the detection module; wherein, when the detection result is that the power device is in the first overcurrent state, the drive module is configured to cause the power device to enter the first protection mode that is softly turned off and does not respond to the system switching signal; when the detection result is that the power device is in the second overcurrent state, the drive module is configured to cause the power device to enter a second protection mode that is softly turned off but responds to a system switching signal; wherein the overcurrent degree in the first overcurrent state is higher than that of the second overcurrent state.Type: GrantFiled: May 1, 2020Date of Patent: February 1, 2022Assignee: LEN Technology LimitedInventors: Jingquan Chen, Chuan Ni, Wei Lu
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Publication number: 20220006451Abstract: The present application discloses a driving device for a power device, which includes a control circuitry configured to receive at least a system switching command and a feedback signal of a power device, and to generate a pull-up strength control signal or a pull-down strength control signal according to the received signals; and a pull-up array and/or a pull-down array, coupled between the control circuitry and the power device, and configured to provide a corresponding pull-up or pull-down strength for the power device according to the pull-up or pull-down strength control signal. The present application also discloses the corresponding electric appliance and power device driving method.Type: ApplicationFiled: July 2, 2020Publication date: January 6, 2022Inventors: Jingquan Chen, Chuan Ni, Wei Lu
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Publication number: 20210344335Abstract: This application discloses a driving device for a power device. It includes a detection module, coupled to the power device, configured to detect the overcurrent status of the power device; a drive module, respectively coupled to the detection module and the power device, configured to regulate the power device according to the detection result of the detection module; wherein, When the detection result is that the power device is in the first overcurrent state, the drive module is configured to cause the power device to enter the first protection mode that is softly turned off and does not respond to the system switching signal; when the detection result is that the power device is in the second overcurrent state, the drive module is configured to cause the power device to enter a second protection mode that is softly turned off but responds to a system switching signal; wherein the overcurrent degree in the first overcurrent state is higher than that of the second overcurrent state.Type: ApplicationFiled: May 1, 2020Publication date: November 4, 2021Inventors: Jingquan Chen, Chuan Ni, Wei Lu
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Publication number: 20210258005Abstract: The present application provides a power device driver including a detection module coupled to the power device and configured to detect the state of the power device; a driving module coupled to the detection module and the power device respectively and configured to detect the power of the detection module. As a result, the power device is regulated; wherein the detection module includes a fast detection sub-module configured to detect a state of the power device within a preset time period after the input signal of the driving device is invalid, and controlling the driving module to softly turn off the power device when there is overcurrent. The present application also provides a corresponding power device driving method and electric equipment.Type: ApplicationFiled: April 28, 2020Publication date: August 19, 2021Inventors: Jingquan Chen, Chuan Ni, Wei Lu
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Publication number: 20200358353Abstract: The present application provides a controller for a switching power supply such as a DC-DC converter which provides an output voltage and an output current. The controller is configured to provide at least one control signal to operate the switching power supply to maintain the output voltage at a first reference voltage. The controller employs a load line compensator responsive to output current for adjusting the reference voltage employed by the compensator. The load line compensator employs one or either or both of a high pass filter or saturating element to provide a filtered/saturated value which is the value employed in adjusting the reference voltage.Type: ApplicationFiled: August 6, 2017Publication date: November 12, 2020Inventors: Mark Hartman, Jingquan Chen, Jeffrey D. Mincey
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Patent number: 10566899Abstract: This disclosure is related to the technical field of magnets, and in particular to a method for applying a coupled inductor to a DC-DC converter providing a DC current output, and based on the number of phases of the DC-DC converter, the coupled inductor is designed to have a corresponding number of windings, the windings are reversely coupled to cancel out the magnetizing fields to avoid flux saturation of the magnet material under high current excitation, and the coupled inductor has air gaps, the leakage flux in the air gap induced by each winding is in the same direction, the leakage magnetic flux is used to achieve the filtering of the output current.Type: GrantFiled: May 4, 2018Date of Patent: February 18, 2020Assignee: LEN Technology LimitedInventors: Jingquan Chen, Chuan Ni
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Patent number: 10205390Abstract: A method for controlling a DC-to-DC converter includes: (a) regulating a magnitude of an output voltage of the DC-to-DC converter according to a magnitude of a reference voltage; (b) in response to a command to enter the unregulated operating mode, allowing the magnitude of the output voltage to fall; and (c) adjusting the magnitude of the reference voltage to track the magnitude of the output voltage. A controller for a DC-to-DC converter includes reference and switching modules. The reference module generates a reference voltage, such that: (a) a magnitude of the reference voltage is fixed, in a regulated operating mode, and (b) the magnitude of the reference voltage tracks a magnitude of an output voltage of the DC-to-DC converter, in the unregulated operating mode. The switching module controls a power stage of the DC-to-DC converter to regulate the magnitude of the output voltage, in the regulated operating mode.Type: GrantFiled: August 7, 2017Date of Patent: February 12, 2019Assignee: Volterra Semiconductor CorporationInventors: Sombuddha Chakraborty, Jingquan Chen, Paul H. Choi
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Publication number: 20180323709Abstract: This disclosure is related to the technical field of magnets, and in particular to a method for applying a coupled inductor to a DC-DC converter providing a DC current output, and based on the number of phases of the DC-DC converter, the coupled inductor is designed to have a corresponding number of windings, the windings are reversely coupled to cancel out the magnetizing fields to avoid flux saturation of the magnet material under high current excitation, and the coupled inductor has air gaps, the leakage flux in the air gap induced by each winding is in the same direction, the leakage magnetic flux is used to achieve the filtering of the output current.Type: ApplicationFiled: May 4, 2018Publication date: November 8, 2018Inventors: Jingquan Chen, Chuan Ni
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Patent number: 9729052Abstract: A method for controlling a DC-to-DC converter includes: (a) regulating a magnitude of an output voltage of the DC-to-DC converter according to a magnitude of a reference voltage; (b) in response to a command to enter the unregulated operating mode, allowing the magnitude of the output voltage to fall; and (c) adjusting the magnitude of the reference voltage to track the magnitude of the output voltage. A controller for a DC-to-DC converter includes reference and switching modules. The reference module generates a reference voltage, such that: (a) a magnitude of the reference voltage is fixed, in a regulated operating mode, and (b) the magnitude of the reference voltage tracks a magnitude of an output voltage of the DC-to-DC converter, in the unregulated operating mode. The switching module controls a power stage of the DC-to-DC converter to regulate the magnitude of the output voltage, in the regulated operating mode.Type: GrantFiled: December 24, 2013Date of Patent: August 8, 2017Assignee: Volterra Semiconductor LLCInventors: Sombuddha Chakraborty, Jingquan Chen, Paul H. Choi
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Patent number: 9195246Abstract: Disclosed are devices, apparatus, circuitry, components, mechanisms, modules, systems, and methods for virtual output voltage sensing for feed-forward control of a voltage regulator. A buffer has an input coupled to sense a monitored signal indicating a duty cycle of switch circuitry coupled to an output filter of the voltage regulator. The buffer is configured to provide at an output, responsive to the monitored signal, a buffer output signal having a high reference voltage for a high side on time and a low reference voltage for a low side on time of the switch circuitry. A filter is coupled to receive and filter the buffer output signal to provide a feed-forward signal indicating the output voltage of the voltage regulator. Control circuitry is configured to control the switching of the switch circuitry responsive to the feed-forward signal.Type: GrantFiled: February 7, 2013Date of Patent: November 24, 2015Assignee: Volterra Semiconductor CorporationInventors: Seth Kahn, Joel Tang, Jingquan Chen
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Patent number: 8525502Abstract: A digital pulse controller uses digital logic to send pulses to a high side and low side switches of a switch-mode power supply converter. The digital logic uses a pulse frequency mode which includes a frequency targeting mode and an ultrasonic mode. The frequency targeting mode dynamically adjusts the size of the pulses in order to achieve a switching frequency within a desired band. The ultrasonic mode is switched into when the frequency of the pulses are at or below a threshold and the time of the pulses reaches a minimum threshold.Type: GrantFiled: March 2, 2011Date of Patent: September 3, 2013Assignee: Exar CorporationInventors: Jason Weinstein, Zhenyu Zhao, Jingquan Chen
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Patent number: 8362756Abstract: A controller produces high-side and low-side control signals. The high and low-side signals are used to switch high-side and low-side transistors in the power stage to control the voltage across the power stage output capacitor of the power stage. A boost feedback charge pump receives the low or high-side signal to increase the charge on a charge pump output capacitor. The controller is configured to send Pulse Frequency Modulation (PFM) high and low-side signals that control the voltage on the power stage output capacitor and charge the charge pump output capacitor. The controller is also configured to send boost feedback (BFB) high and low-side signals that charge the boost feedback capacitor, but are designed to not significantly change the charge on the power stage output capacitor.Type: GrantFiled: December 21, 2010Date of Patent: January 29, 2013Assignee: Exar CorporationInventors: Jason Weinstein, Zhenyu Zhao, Jingquan Chen
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Publication number: 20120223691Abstract: A digital pulse controller uses digital logic to send pulses to a high side and low side switches of a switch-mode power supply converter. The digital logic uses a pulse frequency mode which includes a frequency targeting mode and an ultrasonic mode. The frequency targeting mode dynamically adjusts the size of the pulses in order to achieve a switching frequency within a desired band. The ultrasonic mode is switched into when the frequency of the pulses are at or below a threshold and the time of the pulses reaches a minimum threshold.Type: ApplicationFiled: March 2, 2011Publication date: September 6, 2012Applicant: EXAR CORPORATIONInventors: JASON WEINSTEIN, ZHENYU ZHAO, JINGQUAN CHEN
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Publication number: 20120153916Abstract: A controller produces high-side and low-side control signals. The high and low-side signals are used to switch high-side and low-side transistors in the power stage to control the voltage across the power stage output capacitor of the power stage. A boost feedback charge pump receives the low or high-side signal to increase the charge on a charge pump output capacitor. The controller is configured to send Pulse Frequency Modulation (PFM) high and low-side signals that control the voltage on the power stage output capacitor and charge the charge pump output capacitor. The controller is also configured to send boost feedback (BFB) high and low-side signals that charge the boost feedback capacitor, but are designed to not significantly change the charge on the power stage output capacitor.Type: ApplicationFiled: December 21, 2010Publication date: June 21, 2012Applicant: EXAR CORPORATIONInventors: Jason Weinstein, Zhenyu Zhao, Jingquan Chen