公开(公告)号：US12207367B2

公开(公告)日：2025-01-21

申请号：US18131407

申请日：2023-04-06

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H05B45/30 ,  H02M1/00 ,  H02M1/08 ,  H02M1/32 ,  H02M3/158 ,  H05B45/36 ,  H05B45/3725 ,  H05B45/375 ,  H05B45/38

Abstract: Presented are systems and methods for controlling a compensation circuit. In embodiments, a detection circuit receives a set of control signals that have been generated by a control circuit to drive a set of light emitting diode (LED) switches. The switches control a set of LEDs driven by a DC-DC converter that is coupled to a feedback loop to which the compensation circuit is removably coupled. In embodiments, the detection circuit determines whether the status of an LED is about to change and, in response, uses the compensation circuit to control the feedback loop in a manner such as to reduce a current overshoot or current undershoot in the LED current.

公开(公告)号：US12200839B2

公开(公告)日：2025-01-14

申请号：US18249451

申请日：2022-09-29

Applicant: JIAXING SUPER LIGHTING ELECTRIC APPLIANCE CO., LTD

Inventor： Tao Jiang ,  Lin Zhou ,  Ming-Bin Wang ,  Chih-Shan Yu ,  Rong-Huan Yang ,  Ji-Feng Xu ,  Heng Zhao ,  Jian Lu ,  Qi Wu

IPC: H05B45/30 ,  H05B45/345 ,  H05B45/54

Abstract: This application relates to the field of lighting, and discloses an LED filament. The LED filament includes an LED chip unit, a light conversion layer, and an electrode. The light conversion layer covers the LED chip unit and part of the electrode, and a color of a light emitted by the LED filament after lighting is different from a color of the light conversion layer. This application has the characteristics of uniform light emission and good heat dissipation effect.

公开(公告)号：US12200838B2

公开(公告)日：2025-01-14

申请号：US18132585

申请日：2023-04-10

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： Yen-Wei Liu

IPC: H05B45/30 ,  H03K17/082 ,  H05B45/44

Abstract: An LED driver includes an operational amplifier (OP), N current driving circuits, and a resistor circuit. The OP compares a reference voltage with a feedback voltage to generate a control voltage. Each current driving circuit is coupled with an LED, and includes: an NMOS transistor including a drain, a source, and a gate, and being turned on according to the control voltage in an enablement mode and turned off according to the voltage of a ground terminal in a disablement mode, wherein the drain is coupled with the LED and the voltage at the source is the feedback voltage; and a switch circuit coupling the OP with the gate in the enablement mode, and coupling the ground terminal with the gate in the disablement mode. The resistor circuit is coupled between the source and the ground terminal and controls the current passing through the N current driving circuits.

公开(公告)号：US20240422874A1

公开(公告)日：2024-12-19

申请号：US18725646

申请日：2022-08-30

Applicant: REALMAGIC SEMICONDUCTORS (SHENZHEN) CO., LTD.

Inventor： Wei WANG ,  Jing HAN

IPC: H05B45/30

Abstract: An LED control circuit and an electronic device, and an electronic apparatus. The LED control circuit includes a power terminal, a grounding terminal, and a plurality of control signal outputs, and a level recognition circuit outputs a digital signal according to a voltage difference between a voltage at the power terminal and a voltage at the grounding terminal, a decoding circuit parses the digital signal to obtain control data of the LED control circuit, and output a plurality of control signals to a plurality of control signal outputs according to the control data. Thus, a reference circuit for providing the reference voltage is omitted, a circuit configuration is simplified and a hardware cost is reduced.

公开(公告)号：US20240373521A1

公开(公告)日：2024-11-07

申请号：US18311613

申请日：2023-05-03

Applicant: Infineon Technologies AG

Inventor： Gernot Unterweger ,  Adolfo De Cicco

IPC: H05B45/10 ,  F21K9/00 ,  H05B45/30

Abstract: A system includes a light-emitting diode (LED) circuit comprising a set of LEDs arranged in a formation, wherein the set of LEDs comprise a set of LED clusters; and a controller. The controller is configured to: control, according to a first LED control mode, whether each LED of the set of LEDs is turned on or turned off; and control, according to a second LED control mode, whether each LED cluster of the set of LED clusters is turned on or turned off, wherein the first LED control mode requires the controller to use a first amount of computing resources, wherein the second LED control mode requires the controller to use a second amount of computing resources, and wherein the second amount of computing resources is lower than the first amount of computing resources.

公开(公告)号：US12108507B2

公开(公告)日：2024-10-01

申请号：US17633049

申请日：2020-08-06

Applicant: Hubbell Incorporated

Inventor： Adam J. Clark ,  Perry Romano

IPC: H05B45/50 ,  H02H9/00 ,  H02H9/02 ,  H02J7/00 ,  H05B45/30 ,  H02H1/04 ,  H02H3/08

CPC classification number: H05B45/50 ,  H02H9/001 ,  H02H9/02 ,  H02J7/0024 ,  H05B45/30 ,  H02H1/04 ,  H02H3/08

Abstract: An inrush current protection circuit for a solid state lighting fixture is provided. The inrush current protection circuit includes one or more current limiting devices and one or more switching devices coupled in parallel with the one or more current limiting devices. The one or more switching devices are configured in a first state when the solid state lighting fixture draws an inrush current from a power source. The inrush current is provided to the one or more current limiting devices when the one or more switching devices are in the first state. The one or more switching devices are configured in a second state when the solid state lighting fixture draws a steady-state current from the power source. The steady-state current bypasses the one or more current limiting devices when the one or more switching devices are in the second state.

公开(公告)号：US12108506B2

公开(公告)日：2024-10-01

申请号：US17915902

申请日：2021-03-31

Applicant: Continental Automotive Technologies GmbH

Inventor： Emil Kovatchev

IPC: H05B45/30 ,  H05B45/36 ,  H05B45/48

CPC classification number: H05B45/48 ,  H05B45/36

Abstract: A circuit arrangement comprises an LED chain comprising multiple LEDs; and bypass switching elements, wherein each LED is assigned to one of the bypass switching elements, and the bypass switching elements each have a driver terminal, wherein each of the bypass switching elements is configured to bypass the LED of the LED chain that is associated with the bypass switching element based on a voltage at the driver terminal that is associated with the bypass switching element; and a switch, wherein the driver terminals of the bypass switching elements are connected to the switch via a common node, the switch being configured to discharge a capacitor of a constant current source that can be connected to the LED chain based on a voltage applied to the node. A circuit comprises the circuit arrangement.

公开(公告)号：US12104773B2

公开(公告)日：2024-10-01

申请号：US18616596

申请日：2024-03-26

Applicant: Wangs Alliance Corporation

Inventor： Jonathan Ian Hoffman

IPC: F21V21/26 ,  F21K9/00 ,  F21S2/00 ,  F21S8/06 ,  F21S10/00 ,  F21V7/10 ,  F21V14/00 ,  F21V14/02 ,  F21V14/06 ,  F21V17/02 ,  F21V21/005 ,  F21V21/02 ,  F21V21/04 ,  F21V21/096 ,  F21V21/112 ,  F21V21/14 ,  F21V21/15 ,  F21V21/16 ,  F21V21/22 ,  F21V21/29 ,  F21V21/30 ,  F21V21/35 ,  F21V21/38 ,  F21V23/00 ,  F21V23/04 ,  F21V23/06 ,  H05B45/10 ,  H05B45/20 ,  H05B45/30 ,  H05B47/11 ,  H05B47/12 ,  H05B47/125 ,  H05B47/13 ,  H05B47/14 ,  H05B47/18 ,  B24B41/06 ,  F21Y115/10

CPC classification number: F21V21/14 ,  F21K9/00 ,  F21S2/005 ,  F21S8/066 ,  F21S10/005 ,  F21V7/10 ,  F21V14/003 ,  F21V14/02 ,  F21V14/06 ,  F21V17/02 ,  F21V21/005 ,  F21V21/025 ,  F21V21/04 ,  F21V21/096 ,  F21V21/112 ,  F21V21/15 ,  F21V21/16 ,  F21V21/22 ,  F21V21/29 ,  F21V21/30 ,  F21V21/35 ,  F21V21/38 ,  F21V23/002 ,  F21V23/003 ,  F21V23/0435 ,  F21V23/06 ,  H05B45/10 ,  H05B45/20 ,  H05B45/30 ,  H05B47/11 ,  H05B47/12 ,  H05B47/125 ,  H05B47/13 ,  H05B47/14 ,  H05B47/18 ,  B24B41/06 ,  F21Y2115/10

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. The elongated board may include a non-polar power socket.

公开(公告)号：US12083355B1

公开(公告)日：2024-09-10

申请号：US18400131

申请日：2023-12-29

Applicant: Sichuan Cancer Hospital

Inventor： Meihua Chen ,  Pingjin Zou ,  Xinyu Xue ,  Jinyi Lang ,  Lili Xing ,  Rui Lin

IPC: A61N5/06 ,  A61K41/00 ,  C12N5/09 ,  C12N13/00 ,  G01N33/50 ,  H05B45/30

CPC classification number: A61N5/062 ,  A61K41/0071 ,  C12N5/0693 ,  C12N13/00 ,  G01N33/5091 ,  H05B45/30 ,  A61N2005/0652

Abstract: A photodynamic therapy tablet and corresponding preparation method, as well as a construction method and system specifically designed for anti-tumor models, are disclosed. The tablet includes a wireless power supply unit, a circuit unit, micrometer-level LED array, and a flexible transparent biocompatible encapsulation. It can be surgically implanted in close proximity to tumor cells within the human body, enabling precise irradiation of the targeted tumor cells. By harnessing light of a specific wavelength, the tablet facilitates the generation of lipid peroxides, which, in conjunction with a ferroptosis inducer, effectively triggers ferroptotic cell death in tumor cells. The ultrasound wireless self-powering photodynamic therapy tablet is utilized for the treatment of tumor cells through photodynamic therapy (PDT). By combining the ferroptosis inducer with PDT, the present invention effectively addresses the issue of limited efficacy observed when using the ferroptosis inducer alone.

公开(公告)号：US12069783B2

公开(公告)日：2024-08-20

申请号：US18303871

申请日：2023-04-20

Applicant: Rohm Co., Ltd.

Inventor： Ryosuke Kanemitsu ,  Koji Katsura

IPC: H05B45/30 ,  B60Q3/18 ,  H05B45/10 ,  H05B45/325 ,  H05B45/345 ,  H05B45/3725 ,  H05B45/56

CPC classification number: H05B45/3725 ,  B60Q3/18 ,  H05B45/10 ,  H05B45/325 ,  H05B45/345 ,  H05B45/56

Abstract: This LED driving device comprises: a DC/DC controller which controls an output stage for supplying an output voltage to an LED; and a current driver which generates an output current of the LED, wherein the current driver performs PWM dimming by turning on the output current in accordance with an LED-current-on period of a PWM dimming signal and turning off the output current in accordance with an LED-current-off period of the PWM dimming signal, and the DC/DC controller includes a feedback control unit which performs feedback control for outputting a switching pulse to the output stage so as to make a cathode voltage of the LED equal to a reference voltage, and a pulse addition control unit which performs pulse addition control for adding a predetermined pulse number of additional switching pulses at a time of switching between the LED-current-on period and the LED-current-off period.