Patents by Inventor Hua Song

Hua Song 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: 11895748
    Abstract: A light-emitting diode (LED) array includes an array of pixel assemblies and a pulse width modulator. The pulse width modulator generates pulse width modulation (PWM) signals for controlling a duty cycle of each of the pixels. The pixel assemblies each include an LED, a switching circuit, and a close loop circuit. The switching circuit receives a PWM signal and alternately turns on and off the LED based on the PWM signal. The close loop circuit regulates an LED current provided by the switching circuit to the LED based on a feedback signal received from the switching circuit.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: February 6, 2024
    Assignee: Lumileds LLC
    Inventor: Zhi Hua Song
  • Patent number: 11889606
    Abstract: A LED controller for an LED pixel array includes a serial interface to an external data bus, along with an address generator connected to the serial interface and the LED pixel array. An image frame buffer is connected to the interface to receive image data and further connected to the address generator to receive an image frame buffer address. A command and control module is connected to the serial interface and configured to modify image frame buffer output signals. A calibration data storage module is connected to the command and control module to store calibration data related to pixel voltage response in the LED pixel array and enable modification of voltage provided by the dynamic power supply at least in part based on the image presented by the LED pixel array.
    Type: Grant
    Filed: August 3, 2022
    Date of Patent: January 30, 2024
    Assignee: Lumileds LLC
    Inventors: Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20240032171
    Abstract: A light-emitting diode (LED) array includes an array of pixel assemblies and a pulse width modulator. The pulse width modulator generates pulse width modulation (PWM) signals for controlling a duty cycle of each of the pixels. The pixel assemblies each include an LED, a switching circuit, and a close loop circuit. The switching circuit receives a PWM signal and alternately turns on and off the LED based on the PWM signal. The close loop circuit regulates an LED current provided by the switching circuit to the LED based on a feedback signal received from the switching circuit. The close loop circuit in one pixel assembly may receive a reference current from a close loop circuit of another pixel assembly.
    Type: Application
    Filed: November 20, 2020
    Publication date: January 25, 2024
    Inventor: Zhi Hua Song
  • Patent number: 11877367
    Abstract: A lighting system includes an LED array having a plurality of LED pixels and a power controller. The power controller adjusts a supply voltage for powering the LED pixels based on one or more conditions of the LED array. The power controller may determine the supply voltage based on process data of the LED array. The power controller may adjust the supply voltage based on an operating temperature of the LED pixels and the amplitude of a current driving the LED pixels.
    Type: Grant
    Filed: November 26, 2020
    Date of Patent: January 16, 2024
    Assignee: Lumileds LLC
    Inventors: Ronald Johannes Bonne, Zhi Hua Song
  • Patent number: 11864283
    Abstract: A temperature monitor and control system for a pixel array includes a first driver connected to a first pixel connected to bus by a first switch, a second driver connected to a second pixel connected to a bus by a second switch, and a control block including connection to the first and second switches. The control block turns on the first switch and turns off the second switch, measures bus voltage, determines an LED forward voltage shift of the first pixel and corresponding temperature shift for the first pixel based on the determined forward voltage shift, and adjusts a driving current for first pixel based on the determined temperature shift.
    Type: Grant
    Filed: October 8, 2021
    Date of Patent: January 2, 2024
    Assignee: Lumileds LLC
    Inventors: Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20230422367
    Abstract: A power supply system for a LED pixel array includes at least two power supplies respectively connectable to sub-arrays in a LED pixel array and providing adjustable power. A controller is connected to the at least two power supplies, with the controller able to make adjustments to the power supplied based on measured requirements of sub-arrays in the LED pixel array. In one embodiment, the LED pixel array is a microLED array.
    Type: Application
    Filed: October 8, 2021
    Publication date: December 28, 2023
    Inventors: Zhi Hua Song, Ronald Johannes Bonne
  • Patent number: 11833492
    Abstract: A catalyst structure includes a porous support structure, where the support structure includes an aluminosilicate material and any two or more metals loaded in the porous support structure selected from Ga, Ag, Mo, Zn, Co and Ce. The catalyst structure is used in a hydrocarbon upgrading process that is conducted in the presence of methane, nitrogen or hydrogen.
    Type: Grant
    Filed: June 27, 2022
    Date of Patent: December 5, 2023
    Inventors: Hua Song, Blair Aiken, Peng He, Shijun Meng
  • Publication number: 20230389151
    Abstract: A control system for an LED array relies on defining a first and a second group of separately addressed LED pixels, with the first group including pixels with an average current no less than the current at a Q point and a second group including pixels with an average current less than the current at a Q point. An amplitude signal provided to the first group of separately addressed LED pixels is selectively modulated, while providing a DC mode 100% duty cycle. An amplitude signal provided to the second group of separately addressed LED pixels is fixed, and a modulated duty cycle is provided.
    Type: Application
    Filed: June 1, 2023
    Publication date: November 30, 2023
    Inventors: Antonio Lopez Julia, Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20230365477
    Abstract: A method of desulfurizing a sulfur-containing hydrocarbon feedstock includes introducing the sulfur-containing hydrocarbon feedstock within a reactor in the presence of a gas atmosphere and a catalyst structure, where the catalyst structure comprises a zeolite porous support structure including gallium (Ga) and molybdenum (Mo) loaded in the zeolite porous support structure. The gas atmosphere can include methane. At least 50% of sulfur content can be removed from the feedstock as a result of the desulfurizing method.
    Type: Application
    Filed: July 20, 2023
    Publication date: November 16, 2023
    Inventors: Hua Song, Hao Xu, Zhaofei Li, Yimeng Li
  • Publication number: 20230345598
    Abstract: A temperature monitor and control system for a pixel array includes a first driver connected to a first pixel connected to a bus by a first switch, a second driver connected to a second pixel connected to a bus by a second switch, and a control block including connection to the first and second switches. The control block turns on the first switch and turns off the second switch, measures bus voltage, determines an LED forward voltage shift of the first pixel and corresponding temperature shift for the first pixel based on the determined forward voltage shift, and adjusts a driving current for first pixel based on the determined temperature shift.
    Type: Application
    Filed: October 8, 2021
    Publication date: October 26, 2023
    Inventors: Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20230337343
    Abstract: A micro light emitting diode (LED) die can include a matrix of micro LEDs with a variety of forward voltages. A method of reducing a number of undriven or under driven uLEDs can include providing, by a power supply, an alternating current voltage (VLED) with a minimum voltage (VMIN) and a maximum voltage (VMAX), VMIN being sufficient to drive a plurality of micro light emitting diodes (uLEDs) of a uLED die using a plurality of uLED drivers, identifying, by a controller coupled to the uLED drivers, a uLED of the plurality of uLEDs with a forward voltage (Vf) greater than VMIN, and altering, by the controller, a time of a rising edge of a pulse width modulation (PWM)-on time of the uLED such that Vf of the uLED is less than VLED for the PWM-on time.
    Type: Application
    Filed: June 26, 2023
    Publication date: October 19, 2023
    Inventors: Antonio Lopez Julia, Zhi Hua Song
  • Patent number: 11756947
    Abstract: Light-emitting devices are described herein. A device includes a packaging substrate having a top surface and a bottom surface and a hybridized device having a bottom surface on the top surface of the packaging substrate. The hybridized device includes a silicon backplane that includes input/output (I/O) pins and a light-emitting diode (LED) array having a bottom surface on a top surface of the silicon backplane. Passive components are disposed on the top surface of the packaging substrate. Conductive connectors are electrically coupled between the top surface of the hybridized device and the top surface of the packaging substrate.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: September 12, 2023
    Assignee: Lumileds LLC
    Inventors: Wan-Ying Sau, Ronald Johannes Bonne, Zhi Hua Song
  • Patent number: 11743989
    Abstract: A micro light emitting diode (LED) die can include a matrix of micro LEDs with a variety of forward voltages. A method of reducing a number of undriven or under driven uLEDs can include providing, by a power supply, an alternating current voltage (VLED) with a minimum voltage (VMIN) and a maximum voltage (VMAX), VMIN being sufficient to drive a plurality of micro light emitting diodes (uLEDs) of a uLED die using a plurality of uLED drivers, identifying, by a controller coupled to the uLED drivers, a uLED of the plurality of uLEDs with a forward voltage (Vf) greater than VMIN, and altering, by the controller, a time of a rising edge of a pulse width modulation (PWM)-on time of the uLED such that Vf of the uLED is less than VLED for the PWM-on time.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: August 29, 2023
    Assignee: Lumileds LLC
    Inventors: Antonio Lopez Julia, Zhi Hua Song
  • Patent number: 11725150
    Abstract: Catalyst structures and corresponding methods are described for the desulfurization of sulfur-containing light oil or model compounds under a specified gas atmosphere. The sulfur-containing feedstock is effectively converted while producing valuable hydrocarbon products such as BTX and carbon disulfide, as well as utilizing methane or natural gas resources, providing an economical and environmental innovation in the petroleum industry.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: August 15, 2023
    Assignee: KARA TECHNOLOGIES INC.
    Inventors: Hua Song, Hao Xu, Zhaofei Li, Yimeng Li
  • Patent number: 11716800
    Abstract: A control system for an LED array relies on defining a first and a second group of separately addressed LED pixels, with the first group including pixels with an average current no less than the current at a Q point and a second group including pixels with an average current less than the current at a Q point. An amplitude signal provided to the first group of separately addressed LED pixels is selectively modulated, while providing a DC mode 100% duty cycle. An amplitude signal provided to the second group of separately addressed LED pixels is fixed, and a modulated duty cycle is provided.
    Type: Grant
    Filed: April 20, 2022
    Date of Patent: August 1, 2023
    Assignee: Lumileds LLC
    Inventors: Antonio Lopez Julia, Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20230186835
    Abstract: A method for control of a pixel array based on a temperature estimate is provided. A method includes sampling an anode voltage of each LED of a plurality of pixels resulting in sampled voltages, determining an average voltage based on the sample voltages, and determining a total voltage to provide to the pixels based on the average voltage and voltage data from a memory coupled to the controller, the voltage data including one or more of a 3-sigma value, a driver headroom value, a resistance value, or a k-factor value.
    Type: Application
    Filed: November 22, 2022
    Publication date: June 15, 2023
    Inventors: Ronald Johannes Bonne, Claire Yue Gao, David Christopher Jansson, Zhi Hua Song
  • Patent number: 11644746
    Abstract: A first set of critical dimension (CD) measurements of resist patterns created by a lithography process and a second set of CD measurements of water patterns created by an etch process may be obtained. A forward etch model and an inverse etch model may be calibrated together by reducing (1) a first prediction error between the second set of CD measurements and a first set of simulated CDs predicted by the forward etch model based on the resist patterns, a second prediction error between the first set of CD measurements and a second set of simulated CDs predicted by the inverse etch model based on the wafer patterns, and a matching error between the forward etch model and the inverse etch model.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: May 9, 2023
    Assignee: Synopsys, Inc.
    Inventors: Guangming Xiao, Hua Song
  • Patent number: 11612031
    Abstract: Systems, devices and methods are described herein. A device includes a power stage circuit, a switch and a first circuit. The switch is electrically coupled to the power stage circuit. The first circuit is electrically coupled to the power stage circuit and the switch and has a single output. The first circuit is configured to provide a first circuit output voltage at the single output. The first circuit output voltage has a first level on a condition that the power stage circuit is conducting at a peak current level. The first circuit output voltage has a second level on a condition that the power stage circuit is not conducting.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: March 21, 2023
    Assignee: Lumileds LLC
    Inventor: Zhi Hua Song
  • Publication number: 20230021907
    Abstract: A lighting system includes an LED array having a plurality of LED pixels and a power controller. The power controller adjusts a supply voltage for powering the LED pixels based on one or more conditions of the LED array. The power controller may determine the supply voltage based on process data of the LED array. The power controller may adjust the supply voltage based on an operating temperature of the LED pixels and the amplitude of a current driving the LED pixels.
    Type: Application
    Filed: May 25, 2022
    Publication date: January 26, 2023
    Inventors: Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20230013488
    Abstract: A catalyst structure includes a porous support structure, where the support structure includes an aluminosilicate material and any two or more metals loaded in the porous support structure selected from Ga, Ag, Mo, Zn, Co and Ce. The catalyst structure is used in a hydrocarbon upgrading process that is conducted in the presence of methane, nitrogen or hydrogen.
    Type: Application
    Filed: June 27, 2022
    Publication date: January 19, 2023
    Inventors: Hua Song, Blair Aiken, Peng He, Shijun Meng