Patents Examined by Jimmy T. Vu
  • Patent number: 11917732
    Abstract: An optical device includes: an addressable LED group having ARGB LED units which are connected in series and controlled serially by a specific sequence of digital signals to display colors; an input interface circuit, configured to sense a user's control state; a control circuit, coupled to the addressable LED group and the input interface circuit; a processing circuit, for providing an optical operation; a specific signal port of the processing circuit, coupled to the addressable LED group and coupled to the input interface circuit through the control circuit, configured to receive the specific sequence of digital signals and then transmit the specific sequence of digital signals into an input of a first addressable LED unit in the addressable LED group, and configured to receive an output control signal generated from the input interface circuit by sensing the user's control state.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: February 27, 2024
    Assignee: PixArt Imaging Inc.
    Inventor: Jr-Yi Li
  • Patent number: 11917737
    Abstract: A circuit for sharing current between parallel LEDs or parallel strings of LEDs, and a method of use of the same, are disclosed herein. The circuit for sharing current between parallel LED pathways can include a first LED pathway, a first transistor coupled to the first set of LEDs and that can control a first current through the first set of LEDs, and a first measurement node having a first sensed voltage. The circuit can include a second LED pathway, a second transistor coupled to the second set of LEDs and that can control a second current through the second set of LEDs, and a second measurement node having a second sensed voltage. The circuit includes a first differential amplifier and a second differential amplifier, each of which can compare sensed voltage and can apply a voltage to a gate of one of the first and second transistors.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: February 27, 2024
    Assignee: Bio-Rad Laboratories, Inc.
    Inventor: Edward George Marquette
  • Patent number: 11917735
    Abstract: An LED driving system and a closed-loop control method for LED driving are provided; the LED driving system includes an LED load, a constant-current control module, an electrolytic capacitor, a discharging-voltage measuring module, a bus-voltage measuring module and a charging-current control module, wherein the charging-current control module is connected to an output of the discharging-voltage measuring module, the bus-voltage measuring module and a lower plate of the electrolytic capacitor; the charging current of the electrolytic capacitor is adjusted based on the control signal of the discharging-voltage measuring module and the measured voltage of the bus-voltage measuring module, wherein the charging current of the electrolytic capacitor is reduced by an subtraction operation performed by the addition and subtraction counter, and the charging current of the electrolytic capacitor is increased by an addition operation performed by the addition and subtraction counter.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: February 27, 2024
    Assignee: CRM ICBG (WUXI) CO., LTD.
    Inventors: Jun Liu, Guocheng Li, Quanqing Wu
  • Patent number: 11917739
    Abstract: A linear lighting device may include an elongated housing that defines a cavity. The linear lighting device may include plurality of emitter printed circuit boards configured to be received within the cavity. Each of the plurality of emitter printed circuit boards may include a plurality of emitter modules mounted thereto. Each of the plurality of emitter printed circuit boards may include a control circuit configured to control the plurality of emitter modules mounted to the respective emitter printed circuit board based on receipt of one or more messages. The linear lighting device may include a total internal reflection lens for each of the plurality of emitter printed circuit boards. The total internal reflection lens may be configured to diffuse light emitted by the emitter modules of the plurality of emitter printed circuit boards.
    Type: Grant
    Filed: December 6, 2022
    Date of Patent: February 27, 2024
    Assignee: Lutron Technology Company LLC
    Inventors: Ryan M. Bocock, Fangxu Dong, Ari L. Fox, Christopher M. Green, Peter W. Ogden, Jr., Stephen Phillips, Jonathan R. Redus, Jaykrishna A. Shukla
  • Patent number: 11910506
    Abstract: The present disclosure discloses A lamp controller, comprising a DC power supply and a switch unit, wherein an output end of the DC power supply is electrically connected to the switch unit, the switch unit comprises a first switch set, a second switch set and a control module for controlling the first switch set and the second switch set to be turned on alternately, an output end of the control module is electrically connected to the first switch set, and the output end of the control module forms a second set of switch circuit after being electrically connected to the second switch set; and the lamp controller further comprises a control unit, which is electrically connected to the switch unit; the switch unit further comprises: a first toggle switch.
    Type: Grant
    Filed: September 12, 2022
    Date of Patent: February 20, 2024
    Assignee: Changzhou Jutai Electronic Co., Ltd.
    Inventors: Jun Lin, Chengqian Pan, Wei Huang, Jin Chen
  • Patent number: 11910500
    Abstract: A lighting apparatus includes a first light source, a second light source and a driver. The first light source has multiple first LED modules. The second light source has multiple second LED modules. The driver controls the first light source and the second light source to generate an output light of a required mixed color temperature. The driver selects a first subset of the multiple first LED modules and a second subset of the multiple second LED modules to generate a first output light with a first color temperature. The driver selects a third subset of the multiple first LED modules and a fourth subset of the multiple second LED modules to generate a second output light with a second color temperature. The first subset is not equal to the third subset. The second subset is not equal to the fourth subset.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: February 20, 2024
    Assignee: LEEDARSON LIGHTING CO., LTD.
    Inventors: Jiayuan Zhang, Changjing Zeng, Jingjing Su, Xiaoming Yang, Zongyuan Liu, Liangliang Cao
  • Patent number: 11903111
    Abstract: The invention relates to a matrix light source comprising a plurality of elementary light sources with light-emitting semiconductor elements, and a common substrate that is in contact with an integrated circuit. The integrated circuit is configured to delay, for a predetermined duration, the light-up of the elementary sources, upon receiving a light-up command.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: February 13, 2024
    Assignee: VALEO VISION
    Inventors: Samuel Daroussin, Zdravko Zojceski
  • Patent number: 11903112
    Abstract: The lighting management system includes: a judgement unit configured to judge whether or not a lighting state around a vehicle based on a first lighting apparatus and a second lighting apparatus meets a first reference for a light amount and a second reference for at least one of a lighting range, a lighting color, and a flashing state; a first control unit configured to control the light amount of at least one of the first lighting apparatus and the second lighting apparatus so that the lighting state is brought to meet the first reference; and a second control unit configured to control at least one of the lighting range, the lighting color, and the flashing state of at least one of the first lighting apparatus and the second lighting apparatus so that the lighting state is brought to meet the second reference.
    Type: Grant
    Filed: November 4, 2022
    Date of Patent: February 13, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kunihiro Iwamoto, Yuta Itozawa, Hirotaka Komura
  • Patent number: 11895749
    Abstract: A light-emitting diode (LED) drive method, an LED drive circuit, and an LED lighting device are provided. The method includes: setting preset values of a maximum on-time parameter and a current limit parameter, where the preset values are in at least two sets; selecting a set of the preset values of the maximum on-time parameter and the current limit parameter after a value of a voltage signal on a direct current (DC) bus is detected; controlling a drive current flowing through an LED load based on a selected maximum on-time parameter and a selected current limit parameter. The maximum on-time parameter and the current limit parameter of the system can be adaptively adjusted according to an input voltage, so that the system can have a preferred dimming schedule and dimming depth while realizing a constant current in a wider input voltage range.
    Type: Grant
    Filed: September 29, 2022
    Date of Patent: February 6, 2024
    Assignee: JOULWATT TECHNOLOGY CO., LTD.
    Inventor: Yaohua He
  • Patent number: 11892148
    Abstract: Apparatus and methods for deployment of fixtures. The apparatus may include a system for controlling deployed fixtures. The system may receive user commands different devices in different formats. The fixtures may be independently addressable. The fixtures may be magnetically supported by a fixture support. A brace may join two or more fixture supports without reducing space available to support fixtures. The brace may join a fixture support to a fixture support accessory. An accessory may include a variable-angle junction. The fixture may include articulating joints for controlling the direction of a beam. The fixture may include a lens having an electrically controllable beam spread angle. The fixture may be stowable in the fixture support. The fixture may be slidable along a cord to adjust a height of the fixture. The fixture may include an extendable ring. The system may coordinate motions of the fixtures to follow a target. The fixture may include an elongated board.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: February 6, 2024
    Assignee: Wangs Alliance Corporation
    Inventors: Peter Vancorenland, Michael Sabolcik
  • Patent number: 11889599
    Abstract: The present disclosure provides a technology for precisely controlling an LED driving current using fine current trimming data stored in a memory when driving an LED.
    Type: Grant
    Filed: December 1, 2022
    Date of Patent: January 30, 2024
    Assignee: LX SEMICON CO., LTD.
    Inventors: Ji Hwan Kim, Jang Su Kim
  • Patent number: 11889594
    Abstract: A system includes lighting devices coupled to output supply pins, a microcontroller circuit, and a driver circuit, which receives data therefrom, and switches coupled in series to the lighting devices. The driver circuit includes output supply pins and selectively propagates a supply voltage to the output supply pins to provide respective pulse-width modulated supply signals at the output supply pins. The driver circuit computes duty-cycle values of the pulse-width modulated supply signals as a function of the data received from the microcontroller circuit. The lighting devices include at least one subset coupled to the same output supply pin. The microcontroller individually controls the switches via respective control signals to individually adjust a brightness of the lighting devices in the at least one subset of lighting devices.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: January 30, 2024
    Assignees: STMicroelectronics (Grenoble 2) SAS, STMicroelectronics S.r.l., STMicroelectronics Application GMBH
    Inventors: Manuel Gaertner, Philippe Sirito-Olivier, Giovanni Luca Torrisi, Thomas Urbitsch, Christophe Roussel, Fritz Burkhardt
  • Patent number: 11889597
    Abstract: A light fixture of a light system is configured to be dimmable using a dimming signal that is either a direct-current (DC) dimming signal or an alternating-current (AC) dimming signal. For example, a 0-10 volt DC dimming signal could be used, or a 120 volt AC dimming signal could be used. A dimming controller in the light fixture is configured to receive both a DC and an AC dimming signals and adjust a brightness and/or color of a light based on the dimming signal.
    Type: Grant
    Filed: June 17, 2022
    Date of Patent: January 30, 2024
    Assignee: Tivoli, Inc.
    Inventors: Lien-Chung Lin, Bey Shing Jang
  • Patent number: 11889601
    Abstract: A spectrum control device includes a control unit that obtains spectrum information. The control unit controls at least one of a spectrum of light emitted by a light emitting device or a spectrum of image light that forms an image, on the basis of the spectrum information.
    Type: Grant
    Filed: December 25, 2019
    Date of Patent: January 30, 2024
    Assignee: KYOCERA Corporation
    Inventors: Nobuyoshi Nakayama, Takayuki Kimura, Hidetaka Katou
  • Patent number: 11877362
    Abstract: A thermal foldback control system including a temperature sensitive circuit configured to output a reference voltage corresponding to a temperature of at least one selected from a group consisting of a light emitting diode (LED) driver, a LED engine, and a LED, wherein a driver output of the LED driver is based on the reference voltage.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: January 16, 2024
    Assignee: HLI SOLUTIONS, INC.
    Inventors: Michael W. Bandel, Ray M. Lazalier
  • Patent number: 11877361
    Abstract: A controllable lighting device may comprise a drive circuit characterized by one or more cycles and a control circuit configured to control the drive circuit to conduct a load current through a light source of the lighting device. The control circuit may be configured to determine one or more operating parameters of the lighting device during a present cycle of the drive circuit based on a feedback signal indicative of a peak magnitude of the load current conducted through the light source. The control circuit may be able to adjust an average magnitude of the load current conducted through the light source so as to adjust an intensity of the light source towards a target intensity based on the operating parameters.
    Type: Grant
    Filed: June 6, 2022
    Date of Patent: January 16, 2024
    Assignee: Lutron Technology Company LLC
    Inventor: Stuart W. DeJonge
  • Patent number: 11871488
    Abstract: A six-in-one dimming circuit includes a main control power circuit, a silicon controlled rectifier signal acquisition circuit, a DIM signal conversion circuit, a silicon controlled rectifier signal conversion circuit, and an output current control circuit. The main control power circuit comprises a live wire and a neutral wire connected to a silicon controlled rectifier dimmer or an electronic low-voltage (ELV) dimmer or a magnetic low-voltage (MLV) dimmer, and further comprises a power output positive electrode and a power output negative electrode connected to a 0-10 V dimmer or a resistance dimmer or a pulse width modulation (PWM) dimmer; and the DIM signal conversion circuit comprises a DIM signal positive input terminal and a DIM signal negative input terminal. The dimming circuit is well compatible with silicon controlled rectifier dimming, ELV dimming, MLV dimming, 0-10 V dimming, resistance dimming, and PWM dimming, to achieve six different dimming modes.
    Type: Grant
    Filed: May 4, 2023
    Date of Patent: January 9, 2024
    Assignee: Wuxi Seastar Lighting Co., Ltd.
    Inventor: Zhihui Huang
  • Patent number: 11864282
    Abstract: The present disclosure provides a light emitting element driving device. The light emitting element driving device includes a constant current circuit and a current detection unit. The constant current circuit includes: a first transistor including a first end, a second end and a control end connected to an external terminal; a current setting resistance connected to the second end of the first transistor; and a drive amplifier including a first input end connected to a first node to which the first transistor and the current setting resistance are connected, a second input end to which a current set voltage is applied, and an output end connected to the control end of the first transistor. The current detection unit generates a current detection signal based on a feedback voltage generated in the first node.
    Type: Grant
    Filed: August 19, 2022
    Date of Patent: January 2, 2024
    Assignee: Rohm Co., Ltd.
    Inventors: Makoto Suyama, Koji Katsura, Toshiro Okubo
  • Patent number: 11856666
    Abstract: Disclosed is an AC source direct driving LED lighting device. The device including: a light emitting unit which has a first electrolytic capacitor and receives a rectified alternating current (AC) voltage to adjust a first constant current and emits an LED array; a charging/discharging unit which receives the adjusted first constant current to be adjusted to second to fourth constant currents and charges/discharges second to fourth electrolytic capacitors embedded therein, respectively; a discharge LED path unit which forms a path through which a voltage charged in the charging/discharging unit is discharged to the light emitting unit; and a current driving unit which receives the adjusted first to fourth constant currents to form first to fourth channel using first to fourth reference voltages and controls current transfer.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: December 26, 2023
    Assignee: ISLT CO., LTD.
    Inventors: Myeong-Kook Gong, Da-Young Gong
  • Patent number: 11856669
    Abstract: A driving method, for a controller in a display apparatus, is disclosed. The display apparatus includes LED strings, scan transistors, current regulators and a power converter. The driving method includes following steps. LED cathode voltages are detected on nodes between the LED strings and the current regulators. When a first LED cathode voltage is equal to a minimal operable voltage of the current regulators and a second LED cathode voltage exceeds the minimal operable voltage of the current regulators, a driving current flowing through the second data channel is adjusted by increasing a pulse current level of the driving current and reducing a duty cycle ratio of the driving current flowing through the second data channel.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: December 26, 2023
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Jhih-Siou Cheng, Chih-Hsien Chou, Ren-Chieh Yang