公开(公告)号：WO2021170451A1

公开(公告)日：2021-09-02

申请号：PCT/EP2021/053748

申请日：2021-02-16

Applicant: SIGNIFY HOLDING B.V.

Inventor： BEIJ, Marcel ,  HONTELE, Bertrand, Johan, Edward

IPC: H05B45/10 ,  H05B45/325 ,  H05B45/375 ,  H05B45/395

Abstract: A system is created for an efficient dimming LED lighting system, and comprising a voltage source, an electronic switch controlled by a pulse width modulation, PWM, driving signal and an LED lighting module connected in series. The LED comprises an LED group and a constant current drive circuit to drive a constant current through the LED group. The voltage source and a bypass branch, which is connected in parallel with the electronic switch, is adapted such that when the electronic switch is open, a power delivered to the constant current drive circuit is sufficient to maintain operation of the constant current drive circuit, ensuring capability for a deep dimming.

公开(公告)号：WO2021186467A1

公开(公告)日：2021-09-23

申请号：PCT/IN2021/050252

申请日：2021-03-12

Applicant: TVS MOTOR COMPANY LIMITED

Inventor： DIVYA SRI, Chinnala

IPC: H05B45/36 ,  H05B45/14 ,  H05B45/395 ,  H05B45/50 ,  H05B45/52 ,  H05B45/56

Abstract: The present subject matter relates generally to an integrated driver circuit (101) for an illumination system of a vehicle (100). The integrated driver circuit (101) integrates a transient over voltage protection circuit, a filtering circuit and a reverse polarity protection circuit with a single control unit (106) in order to monitor the current being sent to plurality of LED lamps (LED1, LED2, LED3) provided in the vehicle and to control the illumination of plurality of the LED lamps (LED1, LED2, LED3) through plurality of MOSFET switches (M1, M4, M2) by controlling the gate voltage of the MOSFET switches (M1, M4, M2). The integration is enabled by using a single driver circuit instead of multiple drivers for each lamp in the vehicle. Integrated driver integrates the actuation of each of the lamp independently.

公开(公告)号：WO2021227593A1

公开(公告)日：2021-11-18

申请号：PCT/CN2021/077158

申请日：2021-02-22

Applicant: 佛山市威得士灯饰电器有限公司

Inventor： 武良举

IPC: H05B45/395

Abstract: 本实用新型提供一种用于LED灯具的线性可控硅调光驱动装置，包括一整流单元，一线性恒流单元，一滤波单元和一去频闪控制单元，使得一输出负载单元接收从前端的一外部电源的电能经过所述整流单元、所述线性恒流单元、所述滤波单元和所述去频闪控制单元而被驱动，其中所述输出负载单元被连接至去频闪控制单元的后端，其中所述线性恒流单元进一步包括一主控芯片和一保护单元，其中所述线性恒流单元作为主体的方式被设置，其中所述线性恒流单元被连接至所述整流单元的后端，其中所述去频闪控制单元、所述滤波单元被分别连接至所述线性恒流单元。

公开(公告)号：WO2021094126A1

公开(公告)日：2021-05-20

申请号：PCT/EP2020/080742

申请日：2020-11-03

Applicant: SIGNIFY HOLDING B.V.

Inventor： THIJSSEN, Johannes, Maria ,  TER WEEME, Berend, Jan, Willem ,  KAHLMAN, Henricus, Marius, Joseph, Maria

IPC: H05B45/20 ,  H05B45/395 ,  H05B45/46

Abstract: A Light Emitting Diode, LED, based lighting device arranged for emitting a particular color of light, wherein said LED based lighting device comprises a power supply unit arranged for providing a Direct Current, DC, bus voltage for powering LEDs, a plurality of parallel cascaded LED channels, wherein each of said LED channels is connected to said bus voltage and comprises at least one LED and a switch for activating said corresponding LED channel, a controller arranged for providing control signals to each of said switches in said LED channels for periodically activating said LED channels, wherein each of said control signals has a duty cycle, and wherein said controller is arranged for determining said duty cycles of said control signals based on a received color set point characterized in that each of said plurality of parallel cascaded LED channels comprises a linear current regulator arranged for converting, when said corresponding switch is activated, a varying DC bus voltage to a constant current

公开(公告)号：WO2023286545A1

公开(公告)日：2023-01-19

申请号：PCT/JP2022/024852

申请日：2022-06-22

Applicant: 株式会社小糸製作所

Inventor： 柳津　翔平 ,  太田　優

IPC: H05B45/56 ,  B60Q1/04 ,  F21V23/00 ,  H05B45/10 ,  H05B45/14 ,  H05B45/18 ,  H05B45/305 ,  H05B45/325 ,  H05B45/375 ,  H05B45/38 ,  H05B45/395 ,  H05B45/46 ,  H05B47/105 ,  H05B47/165 ,  H05B47/18 ,  H05B47/28

Abstract: 第１基板（Ｋ１）に設けられ、電源電圧（Ｖｂａｔ）に基づいて所定電圧を生成する電源回路（２０）と、第２基板（Ｋ２）に設けられ、複数の発光素子と、前記複数の発光素子のそれぞれに流れる駆動電流を調整する調整部と、を含み、前記所定電圧を電源とする光源（３０）と、第３基板（Ｋ３）に設けられ、前記調整部を制御する制御部（４０）と、前記第１基板（Ｋ１）に設けられ、温度を検出する第１温度検出回路（５０）と、前記第２基板に設けられ、温度を検出する第２温度検出回路（６０）と、を有する灯具。

公开(公告)号：WO2022023088A1

公开(公告)日：2022-02-03

申请号：PCT/EP2021/070040

申请日：2021-07-16

Applicant: SIGNIFY HOLDING B.V.

Inventor： KAHLMAN, Henricus, Marius, Joseph, Maria ,  ZIJLMAN, Theo, Gerrit ,  HONTELE, Bertrand, Johan, Edward

IPC: H05B45/395 ,  H05B45/347 ,  H02M1/42

Abstract: A Light Emitting Diode, LED, driver arranged for driving at least one LED, said LED driver comprising a rectifier arranged for receiving an Alternating Current, AC, supply voltage and for providing an output Direct Current, DC, voltage to said at least one LED, a voltage regulating branch arranged for controlling an LED voltage provided to said at least one LED, via a supply line, wherein said voltage regulating branch is arranged for receiving said DC voltage from said rectifier, wherein said voltage regulating branch comprises, a capacitor arranged for providing said LED voltage to said at least one LED, a current limiter, connected in series with said capacitor, and arranged for charging said capacitor thereby providing said LED voltage and a feedback circuit arranged for controlling the charging of said capacitor by said current limiter, and thereby controlling the LED voltage provided to said at least one LED, by regulating a minimum residual headroom voltage present on a LED current limiter coupled in series with said at least one LED.

公开(公告)号：WO2021181229A1

公开(公告)日：2021-09-16

申请号：PCT/IB2021/051850

申请日：2021-03-05

Applicant: ALCON INC.

Inventor： JUNG, David ,  LEE, Jason L.

IPC: H05B45/20 ,  H05B45/395 ,  H05B45/34

Abstract: Systems and methods are disclosed for controlled illumination of LEDs. An example system comprises: a plurality of LEDs; an LED controller; a current buffer adapted to receive an input bias level signal from the LED controller, wherein a set of LEDs to be controlled together are connected in parallel with each other in a circuit with the current buffer; and at least one current limiting resistor connected in the circuit with the plurality of LEDs and the current buffer. The systems and methods are adapted to control the illumination of the LEDs by applying a constant voltage to the circuit based upon the input bias level signal, thereby controlling the illumination of the light-emitting diodes without the use of pulse width modulation. Crosstalk interference with RFID components due to pulse width modulation is thereby avoided.

公开(公告)号：WO2020194236A1

公开(公告)日：2020-10-01

申请号：PCT/IB2020/052872

申请日：2020-03-26

Applicant: STEPAN ENGINEERING GMBH

Inventor： STEPAN, Thomas ,  STEPAN, Peter

IPC: F21S4/24 ,  H05B45/395 ,  F21Y115/10 ,  F21Y103/10 ,  H05B33/08

Abstract: Mit der vorliegenden Erfindung wird für abtrennbare Endlos-Konstantspannungs-LED- Streifen bestehend aus einer Vielzahl von aneinandergereihten Lichterzeugermodulen (10) die Möglichkeit geboten, mittels Anschluss eines Kabels/Klemme/Stecker oder durch Anbringung eine Lötbrücke auf verschiedene durch eine markierte Verbindungsschnittstelle (11) unterbrechbare Lötpads (2, 4, 5), die Leistung/Lichtstrom eines LED-Streifens bzw. LED-Strips (SELV) über seine gesamte Länge hinsichtlich seiner Lichtleistung zu konfigurieren. Da der LED-Strip (1) in seiner Leistung/Lichtstrom konfiguriert werden kann, kann somit auf die Lagerlegung weiterer Typen solcher Konstantspannungs-LED-Streifen mit unterschiedlicher Leistung/Lichtstrom verzichtet werden und der Lagerbestand massiv reduziert werden. Die Flexibilität des Einsatzes des SELV ist dadurch deutlich erhöht. Es wird dem Fachmann darüber hinaus ermöglicht auch nachträglich sehr einfach die Lichtleistung eines entsprechend ausgerüsteten Leuchtkörpers zu verändern.

公开(公告)号：WO2022113502A1

公开(公告)日：2022-06-02

申请号：PCT/JP2021/034892

申请日：2021-09-22

Applicant: パナソニックＩＰマネジメント株式会社

Inventor： 宮本　賢吾 ,  前場　康太

IPC: H05B45/31 ,  H05B45/315 ,  H05B45/37 ,  H05B45/395 ,  H05B47/19

Abstract: 本開示の目的は、定電流電源部の供給電力が不足する可能性を低減することである。負荷制御システム（１）はスイッチ（１１）と制御部（１２１）と付加機能部（１２２）と定電流電源部（１３）とを備える。スイッチ（１１）は、交流電源（２）に対して負荷（３）と直列に接続され、負荷（３）に供給する交流電圧の位相を制御する。制御部（１２１）は、スイッチ（１１）を導通状態または非導通状態に制御する。付加機能部（１２２）は、制御部（１１）の制御とは異なる処理を行う。定電流電源部（１３）は、交流電源（２）から供給される電力を受けて、制御部（１２１）及び付加機能部（１２２）に供給するための定電流電力を生成する。定電流電源部（１３）は、交流電源（２）からの入力電流によって充電される蓄電部（Ｃ１）を有し、蓄電部（Ｃ１）を電源として定電流電力を生成する。制御部（１２１）は、蓄電部（Ｃ１）の電圧値に応じて、定電流電源部（１３）が交流電源（２）から電力の供給を受ける供給期間を制御する。

公开(公告)号：WO2022078906A1

公开(公告)日：2022-04-21

申请号：PCT/EP2021/077902

申请日：2021-10-08

Applicant: SIGNIFY HOLDING B.V.

Inventor： ZIJLMAN, Theo, Gerrit ,  KAHLMAN, Henricus, Marius, Joseph, Maria ,  HONTELE, Bertrand, Johan, Edward

IPC: H05B45/395

Abstract: A LED driver circuit uses a first current source circuit to set an output current, controlled by pulse width modulation and a second current source circuit for charging a storage capacitor. A compensating arrangement is used for increasing the current delivered by the second current source circuit during off period times of the pulse width modulation. This compensates the current drawn from the input and enables better timing control of the input current pulses.