公开(公告)号：US09913325B1

公开(公告)日：2018-03-06

申请号：US15423775

申请日：2017-02-03

申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

发明人： Ningliang Mi

IPC分类号： H05B33/08

CPC分类号： H05B33/083

摘要： A light emitting diode (LED) direct AC drive (DACD) circuit includes LED groups that are connected in series. An LED DACD controller includes current regulators that regulate the LED current of the LED groups. The LED DACD controller measures an on-time of an LED group, and regulates the LED current of the LED groups based on the measured on-time of the LED group.

公开(公告)号：US20180063918A1

公开(公告)日：2018-03-01

申请号：US15675250

申请日：2017-08-11

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Toshiaki NAKAMURA ,  Kazuya KATO ,  Kenichi FUKUDA ,  Akihiro KISHIMOTO

IPC分类号： H05B37/02 ,  H05B39/02 ,  F21S8/10 ,  B60Q1/00

CPC分类号： H05B37/02 ,  B60Q1/0094 ,  F21S43/00 ,  H05B33/083 ,  H05B39/02

摘要： An impedance adjustment circuit varies an impedance of a transistor, thereby adjusting an impedance of a current path. A second control circuit controls a drive circuit to turn on or off at least one switch device of the switch devices while the impedance adjustment circuit is increasing the impedance of the current path. The impedance adjustment circuit adjusts the impedance of the current path to the minimum value after the drive circuit switches the at least one switch device from off to on or from on to off.

公开(公告)号：US09900950B1

公开(公告)日：2018-02-20

申请号：US15678242

申请日：2017-08-16

申请人： NXP B.V.

发明人： Henricus Cornelis Johannes Buthker

IPC分类号： H05B37/02 ,  H05B33/08 ,  B60Q1/14

CPC分类号： H05B33/0845 ,  B60Q1/1423 ,  B60Q2300/114 ,  B60Q2300/312 ,  B60Q2300/314 ,  B60Q2300/42 ,  H05B33/083

摘要： An LED controller includes: a light intensity calculator to calculate light intensity values that correspond to points on a desired light output curve; and processing logic configured to: initialize a scaling parameter of the light intensity calculator with a present scaling value that indicates a first number of steps, dynamically receive a subsequent scaling value that indicates a second number of steps at a change time after the light intensity calculator has begun calculation of the light intensity values according to the present scaling value, and change the scaling parameter of the light intensity calculator to the subsequent scaling value before the light intensity calculator has completed calculation of the light intensity values, wherein a difference between a next light intensity value calculated immediately after the change time and a previous light intensity value calculated immediately before the change time is within a flicker threshold.

公开(公告)号：US20180049301A1

公开(公告)日：2018-02-15

申请号：US15236915

申请日：2016-08-15

申请人： FORD GLOBAL TECHNOLOGIES, LLC

发明人： RONALD PATRICK BROMBACH ,  JOHN BARRS

IPC分类号： H05B37/03 ,  H05B37/02 ,  F21S8/10 ,  H05B33/08 ,  B60Q1/00

CPC分类号： H05B37/036 ,  B60Q1/0088 ,  B60Q1/02 ,  B60Q1/04 ,  B60Q11/002 ,  B60Q11/005 ,  F21S41/141 ,  F21Y2115/10 ,  H05B33/0803 ,  H05B33/0815 ,  H05B33/0821 ,  H05B33/083 ,  H05B33/0848 ,  H05B33/0884 ,  H05B33/089 ,  H05B37/0254

摘要： Apparatus and systems are disclosed for detecting outages in an LED lamp assembly. An example disclosed lamp assembly includes a plurality of LED circuits serially connected together. The LED circuits include an LED, a first resistor and an optocoupler. The example disclosed lamp assembly also includes a sense line electrically coupled to one of the LED circuits. The sense line has a first voltage value when all of LEDs in that plurality of LED circuits are operational and a second voltage value when at least one of the LEDs has failed.

公开(公告)号：US09894731B2

公开(公告)日：2018-02-13

申请号：US15293936

申请日：2016-10-14

申请人： Continental Automotive GmbH

发明人： Emil Kovatchev

IPC分类号： H05B33/08 ,  B60Q1/14 ,  B60C11/00

CPC分类号： H05B33/089 ,  B60C11/005 ,  B60Q1/1415 ,  B60Q11/005 ,  H05B33/0815 ,  H05B33/083 ,  H05B33/0845

摘要： A method for detecting a failure of at least one light emitting diode in a light emitting diode arrangement to which a supply current is applied by a constant-current source via a supply terminal and in which a respective luminous state of the light emitting diodes is set individually or in groups by means of a respective switching element by respective short-circuiting is disclosed, wherein a voltage signal of a chain voltage dropped across the light emitting diodes and dependent on the respective switching state of the switching elements is tapped off by a circuit apparatus at the supply terminal. The voltage signal is fed to an analog maximum value detector of the circuit apparatus, the maximum value detector is operated for a predetermined measurement duration and a maximum value signal of the voltage signal is provided at an output of the maximum value detector after the measurement duration.

公开(公告)号：US09883555B2

公开(公告)日：2018-01-30

申请号：US14405277

申请日：2014-10-17

申请人： DongGuan Pan American Electronics Co., Ltd.

发明人： Jinsheng Deng ,  Xiaoyun Zeng

IPC分类号： H05B37/02 ,  H05B33/08 ,  F21K9/27 ,  F21Y103/10 ,  F21Y115/10 ,  F21V23/00

CPC分类号： H05B33/0815 ,  F21K9/27 ,  F21V23/003 ,  F21Y2103/10 ,  F21Y2115/10 ,  H05B33/083 ,  H05B33/0845 ,  Y02B20/383

摘要： The present disclosure includes an apparatus, which includes: a transparent cover, a housing to form a first compartment with the transparent cover, one or more light emitting diodes disposed inside the first compartment, and a lighting driver module disposed inside the first compartment and electrically coupled with the one or more light emitting diodes, the lighting driver module including a rectifier to convert an AC signal to a DC signal, a current sensor to measure current supplied to the one or more light emitting diodes and to provide information related to the measured current, a first switching device electrically coupled with the rectifier and with the one or more light emitting diodes, and being capable of being controlled by a controller to interrupt or allow a transmission of the DC signal to the one or more light emitting diodes, based on the information provided by the current sensor.

公开(公告)号：US20180027626A1

公开(公告)日：2018-01-25

申请号：US15545727

申请日：2016-12-12

申请人： SENGLED CO., LTD.

发明人： MINGSHUAI WANG ,  ZHENFENG DING ,  ZHIBIN TIAN ,  JINXIANG SHEN

IPC分类号： H05B33/08 ,  H05B37/02

CPC分类号： H05B33/0866 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0845 ,  H05B33/0863 ,  H05B33/0872 ,  H05B37/0272

摘要： A color-temperature adjustable light-emitting diode (LED) lighting device and a method for adjusting the color temperature of an LED lighting device are provided. The color-temperature adjustable LED lighting device includes: a power supply module, a micro-control unit (MCU), an adjustable LED driving power supply having a positive output terminal and a negative output terminal, a cool white LED array, a warm white LED array, a first switch circuit, a second switch circuit, a first current detection circuit, and a second current detection circuit. The power supply module is connected to an input terminal of the MCU and an input terminal of the adjustable LED driving power supply.

公开(公告)号：US20180020512A1

公开(公告)日：2018-01-18

申请号：US15715288

申请日：2017-09-26

申请人： Silicon Hill B.V.

发明人： Maarten Willem SEGERS ,  Shounak ROY ,  Paul STEFFENS ,  Toon GROENENDAAL ,  Jurgen HONOLD

IPC分类号： H05B33/08

CPC分类号： H05B33/083 ,  F21K9/27 ,  F21Y2115/10 ,  H05B33/0809 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/0887 ,  H05B33/089 ,  Y02B20/341

摘要： An LED lamp arrangement adapted for fitting in a luminaire. The luminaire is adapted for a fluorescent lamp and having a ballast. The LED lamp arrangement has a plurality of LEDs, and two or more electrodes for releasably connecting to the luminaire and for conducting current from the ballast for supply to the LEDs The LED lamp arrangement further has a sensor circuit and a protection circuit. The sensor circuit and the protection circuit are adapted to increase the total load impedance of the LED lamp arrangement if the ballast is a constant power electronic ballast.

公开(公告)号：US09867248B2

公开(公告)日：2018-01-09

申请号：US15361076

申请日：2016-11-25

申请人： Lextar Electronics Corporation

发明人： Chien-Nan Yeh ,  Chun-Jong Chang ,  Po-Shen Chen ,  Kai-Hsiang Shih ,  Jhao-Cyuan Huang ,  Ku-Cheng Lin

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0845 ,  H05B33/083 ,  H05B33/0857 ,  H05B33/086

摘要： A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a phase control circuit, a processing circuit and a first driving circuit. The rectifying circuit is configured to convert an input AC voltage to a rectified voltage signal. The phase control circuit is configured to receive the rectified voltage signal and a dimming command, and output a control voltage signal correspondingly in which the phase control circuit controls a phase delay angle of the control voltage signal according to the dimming command. The processing circuit is configured to receive the control voltage signal and adjust a first driving voltage signal according to the phase delay angle. The first driving circuit is configured to receive the first driving voltage signal to drive a first lighting module.

公开(公告)号：US09854634B2

公开(公告)日：2017-12-26

申请号：US15394962

申请日：2016-12-30

申请人： Cree, Inc.

发明人： Joseph Paul Chobot

IPC分类号： H01J1/60 ,  H01J7/42 ,  H05B37/04 ,  H05B33/08 ,  H05B37/02

CPC分类号： H05B33/0845 ,  H05B33/083 ,  H05B33/0857 ,  H05B33/0863 ,  H05B37/0227 ,  H05B37/0272 ,  Y02B20/341

摘要： A solid state lighting switch can include a first input control that can be configured to adjust a dimming indication or color indication for a solid state lighting fixture that is configured for coupling to the solid state lighting switch. A selective linking mechanism can be configured to activate a linked mode of operation of the switch to link the dimming indication to the color indication or to activate an unlinked mode of operation of the switch to unlink the dimming indication from the color indication.