公开(公告)号：US20230132813A1

公开(公告)日：2023-05-04

申请号：US17572146

申请日：2022-01-10

申请人： LEDVANCE LLC

发明人： Yuhao Liu ,  Nilesh Patel ,  Ming Li

IPC分类号： H05B45/395 ,  H05B45/40

摘要： A driver circuit that includes an input side including a power input circuit and an output side including a light emitting diode (LED) output current circuit. The output side of the driver circuit includes an output smoothing capacitor for controlling flicker percentage. A light emitting diode (LED) power supply circuit is present between the input side and the output side for controlling current from the AC power input circuit to the light emitting diode (LED) output current circuit. The LED power supply circuit includes at least two linear current regulators that are connected in parallel. The circuit also includes a controller circuit including a controller for signaling the light emitting diode (LED) power supply to control current to the light emitting diode (LED) output current circuit to provide a lighting characteristic.

公开(公告)号：US11638336B2

公开(公告)日：2023-04-25

申请号：US17216032

申请日：2021-03-29

申请人： Lynk Labs, Inc.

发明人： Michael Miskin ,  James N. Andersen ,  Robert L. Kottritsch

IPC分类号： H05B45/10 ,  H05B45/42 ,  H05B45/50 ,  H05B45/40 ,  H05B45/37

摘要： A lighting system is disclosed. The example lighting system includes a printed circuit board. At least one LED circuit and a driver circuit are mounted on the printed circuit board. The at least one LED circuit has a plurality of phosphor coated LEDs. The driver circuit includes at least one bridge rectifier and at least one capacitor. The lighting system also includes a housing including a lens. The lighting system further includes a first power connection lead connected to a first input of the bridge rectifier and a second power connection lead connected to a second input of the bridge rectifier. At least a first portion of each power connection lead is contained within the housing and at least a second portion of each power connection lead extends beyond the housing to enable the printed circuit board to be connected to an AC power source.

公开(公告)号：US11570866B2

公开(公告)日：2023-01-31

申请号：US17533961

申请日：2021-11-23

申请人： Semisilicon Technology Corp.

发明人： Wen-Chi Peng

IPC分类号： H05B45/40 ,  H05B45/44 ,  G09G3/32 ,  H05B47/19 ,  H05B47/175 ,  H05B45/10 ,  H04L61/5038 ,  H04L61/5046

摘要： A pixel-controlled LED light includes a plurality of LED modules and a controller. Each LED module includes at least one LED and a LED drive apparatus. The LED drive apparatus burns an ordinal number according to connection sequence thereof. The controller defines the ordinal number of the LED module as a target number, and sequentially transmits a plurality of light data whose number is greater than or equal to the target number to each of the LED modules. Each of the LED drive apparatuses sequentially receives each of the light data and counts sequence of the light data. If the sequence of the light data is equal to the ordinal number of the LED drive apparatus, the LED drive apparatuses identify the light data, and after identifying the light data, the LED drive apparatuses control the corresponding at least one LED.

公开(公告)号：US11564295B2

公开(公告)日：2023-01-24

申请号：US17538349

申请日：2021-11-30

申请人： SAVANT TECHNOLOGIES LLC

发明人： Yimin Zhu ,  Pan Yao ,  Jie Gao ,  Xiangjin Mo ,  Jiachen Yang ,  Kun Xiao

IPC分类号： H05B45/10 ,  H05B45/31 ,  H05B45/40 ,  H05B45/20

摘要： Disclosed are a filament device for an illumination device, the illumination device, and a dimming method for the illumination device. The illumination device comprises: a dimming unit electrically connected to an external power supply, a first illumination unit which is electrically connected to the dimming unit and to which an input voltage from the external power supply is applied, a second illumination unit which is electrically connected to the dimming unit and to which an input voltage from the external power supply is applied, a unidirectional conduction unit electrically connected to the first illumination unit and the second illumination unit, a first current-limiting unit electrically connected to the first illumination unit; and a second current-limiting unit electrically connected to the second illumination unit, wherein the amplitude of the input voltage varies on the basis of a phase-cut angle of the dimming unit, when the amplitude of the input voltage varied on the basis of the phase-cut angle satisfies a first predetermined condition, the unidirectional conduction unit is in a turn-on state, and the illumination device operated in a first operation mode; and when the amplitude of the input voltage varied on the basis of the phase-cut angle satisfies a second predetermined condition, the unidirectional conduction unit is in a turn-off state, and the illumination device operates in a second operation mode. The effect of deepening the dimming depth is achieved.

公开(公告)号：US11470701B2

公开(公告)日：2022-10-11

申请号：US17179321

申请日：2021-02-18

申请人： RUIJIN DEYU OPTOELECTRONICS CO., LTD.

发明人： Yuanming Li ,  Yuanjian Li

IPC分类号： H05B45/40

摘要： An alternating current LED filament includes a base board, rectifier diodes and light-emitting diodes. Two ends of the base board are provided with connecting terminals, and two conductive circuits are arranged on the base board. Two ends of each of the two conductive circuits are respectively connected to an external power supply through an at least one rectifier diode of the rectifier diodes. The rectifier diodes at two ends of a same conductive circuit are arranged in a reversed direction, the rectifier diodes connected to different conductive circuits on a same connecting terminal are arranged in the reversed direction, and the light-emitting diodes are connected to the two conductive circuits. A connecting terminal of the connecting terminals is connected to a corresponding conductive circuit through the at least one rectifier diode to improve a reverse withstand voltage capability.

公开(公告)号：US20220279637A1

公开(公告)日：2022-09-01

申请号：US17750647

申请日：2022-05-23

申请人： Lutron Technology Company LLC

发明人： Stuart W. DeJonge ,  Robert C. Newman, JR.

IPC分类号： H05B45/40 ,  H03K7/08 ,  H05B47/19

摘要： A controllable lighting device may utilize a controllable impedance circuit to conduct a load current through an LED light source. The controllable impedance circuit may be coupled in series with a first switching device, which may be rendered conductive and non-conductive via a pulse-width modulated signal to adjust an average magnitude of the load current. The controllable lighting device may further comprise a control loop circuit that includes a second switching device. The second switching device may be rendered conductive and non-conductive in coordination with the first switching device to control when a feedback signal is provided to the control loop circuit and used to control the LED light source. The control loop circuit may be characterized by a time constant that is significantly greater than an operating period of the load current.

公开(公告)号：US11405996B1

公开(公告)日：2022-08-02

申请号：US17383923

申请日：2021-07-23

申请人： CreeLED, Inc.

发明人： David Suich ,  Casey Lapoint ,  Guy Pickett

IPC分类号： H05B45/40 ,  H05B45/10

摘要： Light-emitting diode (LED) arrays, and more particularly high power LED arrays and related devices are disclosed. Exemplary lighting devices with arrangements of LED chips and/or lumiphoric materials are capable of dynamically providing different color points and/or light outputs. Devices include individually controllable LED chips arranged on a common submount that may include integrated control circuitry for controlling operation of the LED chips. LED chips may be arranged to form sub-arrays of like-colored LED chips and corresponding electrical connections may include one or more shared electrical contacts. Certain aspects relate to arrangements where electrical connections are provided on opposite faces of submounts from the LED chips such that an increased density of LED chips may be arranged along primary emission faces. Applications for such high-power LED arrays and related devices include various color-changing lighting fixtures with high light output that may benefit from dynamic spectral tuning with improved precision.

公开(公告)号：US11343892B2

公开(公告)日：2022-05-24

申请号：US17178260

申请日：2021-02-18

申请人： DELTA ELECTRONICS, INC.

发明人： Tsung-Ta Wu ,  Qi-Rong Lee ,  Wei-Cheng Chiu ,  Yu-Yung Huang ,  Ching-Ho Chou

IPC分类号： H05B45/30 ,  H05B45/355 ,  H05B47/165 ,  H05B45/40 ,  H05B45/325

摘要： A driver is configured to provide an output voltage and an output current to a load according to an input voltage. The driver includes a power converter, first and second detecting devices and a controller. The power converter is configured to receive and convert the input voltage to the output voltage and the output current. The first detecting device is configured to detect the input voltage to generate a first signal. The second detecting device is configured to detect the output voltage to generate a second signal, and detect the output current to generate a third signal. The controller is configured to perform a calculation to the second signal and the third signal according to one of lookup tables corresponding to the first signal to generate a power value. An operation method of a driver and a light source system are also disclosed herein.

公开(公告)号：US11284491B2

公开(公告)日：2022-03-22

申请号：US17001074

申请日：2020-08-24

申请人： Lynk Labs, Inc.

发明人： Michael Miskin ,  Robert L. Kottritsch

IPC分类号： H05B45/44 ,  H05B45/10 ,  H05B45/20 ,  H05B45/24 ,  H05B45/37 ,  H05B45/40 ,  H05B45/46 ,  H05B45/48 ,  H05B45/42

摘要： An LED lighting device is disclosed. The example LED lighting device includes at least one LED circuit having at least two LEDs, where an LED of the at least two LEDs is configured to emit light of a different color temperature or wavelength than at least one other LED of the at least two LEDs. The example LED lighting device also includes a switch connected to the at least one LED circuit and configured to dim at least one of the LEDs of the at least two LEDs that are configured to emit light of the different color temperature or wavelength to enable user selection of different color temperatures or wavelengths of light to be emitted by the at least one LED circuit. The at least one LED circuit and the switch are integrated into the LED lighting device.

公开(公告)号：US11284490B2

公开(公告)日：2022-03-22

申请号：US16951094

申请日：2020-11-18

申请人： ALPINE ELECTRONICS, INC.

发明人： Teiichi Ichikawa

IPC分类号： H05B45/00 ,  H05B45/40 ,  H05B45/37 ,  H05B45/10 ,  F21Y115/10

摘要： A plurality of infrared LEDs, e.g., four, and a plurality of photodiodes, e.g., two, are arranged side by side in interleaved fashion in the order of an LED1, a PD1, an LED2, an LED3, a PD2, and an LED4, and are arranged slightly outside a side of the display surface. A threshold value Th is set so as to become small as max(Ei)/max(Aj) calculated from a detection signal of the PD1 when the LED1 emits light, a detection signal of the PD1 when the LED2 emits light, a detection signal of the PD2 when the LED3 emits light, a detection signal of the PD2 when the LED4 emits light, a detection signal of the PD2 when the LED1 emits light, and a detection signal of the PD1 when the LED4 emits light, and the approach of the hand of the user is detected when max(Aj) exceeds the threshold value.