公开(公告)号：EP4062712A1

公开(公告)日：2022-09-28

申请号：EP20825307.0

申请日：2020-11-20

Applicant: Lumileds LLC

Inventor： SONG, Zhi Hua

IPC: H05B45/10 ,  H05B45/37 ,  H05B45/46

公开(公告)号：EP3217764B1

公开(公告)日：2022-04-27

申请号：EP16159637.4

申请日：2016-03-10

Inventor： Gamperl, David

IPC: H05B45/10 ,  H05B45/3725 ,  H05B45/46 ,  G09G3/34

公开(公告)号：EP3446546B1

公开(公告)日：2022-01-26

申请号：EP17715475.4

申请日：2017-04-04

Inventor： VAN KAATHOVEN, Dirk, Jan ,  ZIJLMAN, Theo, Gerrit ,  VAN DER HAM, Marcel ,  DE JONG, Lambertus, Adrianus, Marinus

IPC: H05B45/325 ,  H05B45/20 ,  H05B45/46

公开(公告)号：EP3934385A1

公开(公告)日：2022-01-05

申请号：EP21186111.7

申请日：2018-11-09

Applicant: Koito Manufacturing Co., Ltd.

Inventor： ICHIKAWA, Tomoyuki ,  MATSUHANA, Ryosuke ,  KIKUCHI, Satoshi ,  KAWABATA, Naoki ,  TAKAHASHI, Norito

IPC: H05B45/10 ,  H05B45/46 ,  H05B45/375 ,  H05B45/347

Abstract: A current driver circuit is proposed, structured to drive a plurality of semiconductor light sources, the current driver circuit comprising: a plurality of current sources each structured to allow an on/off state thereof to be controlled independently according to a PWM signal, and to each be coupled to a corresponding semiconductor light source in series; an interface circuit structured to receive, from an external processor at a first time interval T 1 , a plurality of control data that indicates an on/off duty cycle for the plurality of current sources; and a dimming pulse generator structured to generate a plurality of PWM signals for the plurality of current sources, and to gradually change, at a second time interval T 2 that is shorter than the first time interval T 1 , a duty cycle of each of the plurality of PWM signals from a value indicated by the corresponding control data before updating to a value indicated by the corresponding control data after updating, wherein, with T 1 / T 2 = a, and with the difference in the value between the control data after updating and the control data before updating as ΔX, the dimming pulse generator changes the duty cycle at the second time interval T 2 in a stepwise manner in steps of ΔY = ΔX/a.

公开(公告)号：EP3917287A1

公开(公告)日：2021-12-01

申请号：EP21164865.4

申请日：2021-03-25

Applicant: Marelli Automotive Lighting Reutlingen (Germany) GmbH

Inventor： ZIMMERMANN, Sascha

IPC: H05B45/46 ,  H05B45/345 ,  H05B45/32

Abstract: Die Erfindung betrifft eine elektrische Steuerschaltung (4) zum Steuern mehrerer parallel zueinander geschalteter LED-Anordnungen (2.1, 2.2, 2.3, 2.i). An der Steuerschaltung (4) liegt eine Versorgungsspannung (U Batt ) an. An Steuerausgängen (10a, 10b) sind die LED-Anordnungen (2.1, 2.2, 2.3, 2.i) angeschlossen. Die Steuerschaltung (4) umfasst:
- eine gemeinsame ansteuerbare Stromquelle (12), die einen individuellen Betriebsstrom (I_1; I_2; I_3; I_i) für die LED-Anordnungen (2.1, 2.2, 2.3, 2.i) bereitstellt,
- mehrere Schaltelemente (S_1, S_2, S_3, S_i), von denen jeweils eines einer der LED-Anordnungen (2.1, 2.2, 2.3, 2.i) zugeordnet ist, die den in der dem jeweiligen Schaltelement (S_1, S_2, S_3, S_i) zugeordneten LED-Anordnung (2.1; 2.2; 2.3; 2.i) fließenden Betriebsstrom (I_1; I_2; I_3; I_i) schalten, und
- eine Steuereinheit (14) zur Steuerung der Stromquelle (12) derart, dass diese den Betriebsstrom (I_1; I_2; I_3; I_i) für mindestens eine ausgewählte LED-Anordnung (2.1; 2.2; 2.3; 2.i) bereitstellt, und zur Steuerung der Schaltelemente (S_1, S_2, S_3, S_i) derart, dass der von der Stromquelle (12) bereitgestellte Betriebsstrom (I_1; I_2; I_3; I_i) durch die mindestens eine ausgewählte LED-Anordnung (2.1; 2.2; 2.3; 2.i) fließt.

公开(公告)号：EP3902377A1

公开(公告)日：2021-10-27

申请号：EP21168704.1

申请日：2021-04-15

Applicant: Beghelli S.p.A.

Inventor： BEGHELLI, Gian Pietro

IPC: H05B45/20 ,  H05B47/16 ,  H05B45/46 ,  H05B45/50

Abstract: An LED lighting apparatus having a variable color temperature, comprising an electronic module (10), which is interposed between the output of a control unit (11) of a plurality of lighting LEDs (13) and at least two strips (12), having different color temperature and positioned under a lens, each of which contains one or more of said lighting LEDs (13), characterized in that said control unit (11) includes a selector, suitable for cyclically selecting, by means of said electronic module (10), one of the operation modes between a cold light operation mode, an intermediate light operation mode, a warm light operation mode and a default operation mode, in which said two strips (12) of LEDs (13) are switched on at a speed not perceptible to the human eye and below said lens, so that the color temperature varies according to the duty-cycle used and according to the set operation mode.

公开(公告)号：EP3527043B1

公开(公告)日：2021-05-26

申请号：EP17787373.4

申请日：2017-10-12

Inventor： SUDHAUS, Andre ,  PATEL, Niyant

IPC: H05B45/52 ,  H05B45/46

公开(公告)号：EP3823420A1

公开(公告)日：2021-05-19

申请号：EP19209716.0

申请日：2019-11-18

Applicant: Lumileds Holding B.V.

Inventor： Grave, Manuel ,  Karbowski, Udo

IPC: H05B45/46 ,  H05B45/395 ,  H05B45/20 ,  F21K9/00 ,  H01L25/075 ,  H05B45/40 ,  H01L27/15

Abstract: The invention describes an LED lighting package (1) comprising a first LED string (S1) comprising a plurality of series-connected light-emitting diodes (D red ), and a first linear regulator (LR1) arranged to determine the current through the first LED string (S1); at least one further LED string (S2, S3, S4) comprising a plurality of series-connected light-emitting diodes (Dx, Dy, Dz) of a different colour, and a further linear regulator (LR2, LR3, LR4) arranged to determine the current through that LED string (S2, S3, S4); wherein the different coloured LED strings (S1, S2, S3, S4) are connected in parallel; a common voltage supply (V in ) for the LED strings (S1, S2, S3, S4); and wherein the number of light-emitting diodes (D red ) in the first LED string (S1) exceeds the number of light-emitting diodes (Dx, Dy, Dz) in each further LED string (S2, S3, S4), and the number of light-emitting diodes (D red , Dx, Dy, Dz) in each LED string (S1, S2, S3, S4) is chosen such that the total forward voltage of a further LED string (S2, S3, S4) is essentially the same as the total forward voltage of the first LED string (S1).

公开(公告)号：EP3813491A1

公开(公告)日：2021-04-28

申请号：EP20203043.3

申请日：2020-10-21

Applicant: Leedarson Lighting Co., Ltd.

Inventor： Ye, Hemu ,  Liu, Wei

IPC: H05B45/325 ,  H05B45/345 ,  H05B45/38 ,  H05B45/46 ,  H05B45/20

Abstract: A lighting apparatus includes a first LED module having a first color temperature profile , a second LED module having a second color temperature profile , a third LED module having a third color temperature profile , a constant current generator, a first switch, a third switch and a driver. The constant current generator is used for generating a constant current according to a major PWM signal. The first LED module and the third LED module are connected in parallel and share the constant current. The constant current is adjusted by changing a major duty ratio of the major PWM signal. The driver is used for generating the major PWM signal, a first PWM signal and a third PWM signal. The first color temperature profile, the second color temperature profile and the third color temperature profile have different spectrum distributions.

公开(公告)号：EP3378284B1

公开(公告)日：2021-03-17

申请号：EP16809248.4

申请日：2016-11-17

Inventor： MILLAR, Gary Bret

IPC: H05B45/46 ,  H05B45/48