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1. EP3685634 - LOAD CONTROL DEVICE HAVING A WIDE OUTPUT RANGE

Office European Patent Office
Application Number 18710235
Application Date 23.02.2018
Publication Number 3685634
Publication Date 29.07.2020
Publication Kind A1
IPC
H05B 33/08
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
33Electroluminescent light sources
08Circuit arrangements for operating electroluminescent light sources
CPC
H05B 45/10
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
10Controlling the intensity of the light
H05B 45/50
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
50responsive to malfunctions of LEDs; responsive to LED life; Protective circuits
H05B 45/37
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
30Driver circuits
37Converter circuits
H05B 45/44
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
40Details of LED load circuits
44with an active control inside an LED matrix
H05B 47/155
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
47Circuit arrangements for operating light sources in general, i.e. where the type of the light source is not relevant
10Controlling the light source
155Coordinated control of two or more light sources
Applicants LUTRON TECH CO LLC
Inventors DEJONGE STUART W
KOBER STEVEN J
TAIPALE MARK S
Designated States
Priority Data 201762562066 22.09.2017 US
201762580707 02.11.2017 US
Title
(DE) LASTSTEUERVORRICHTUNG MIT EINEM WEITEN AUSGANGSBEREICH
(EN) LOAD CONTROL DEVICE HAVING A WIDE OUTPUT RANGE
(FR) DISPOSITIF DE COMMANDE DE CHARGE AYANT UNE LARGE PLAGE DE SORTIE
Abstract
(EN)
A load control device (e.g., an LED driver) for controlling the intensity of a lighting load (e.g., an LED light source) may provide a wide output range and flicker-free adjustment of the intensity of the lighting load. The load control device may comprise a load regulation circuit, a control circuit, and a filter circuit (e.g., a boxcar filter circuit) that operates in a different manner in dependence upon a target current. When the intensity of the lighting load is near a low-end intensity, the control circuit may adjust an operating frequency of the load regulation circuit in response to the target current, and may control the filter circuit to filter a current feedback signal during a filter window that repeats on periodic basis. When the intensity of the lighting load is near a high-end intensity, the control circuit may control the filter circuit to constantly filter the current feedback signal.

(FR)
La présente invention concerne un dispositif de commande de charge (par exemple, un pilote de DEL) permettant de commander l'intensité d'une charge d'éclairage (par exemple, une source de lumière à DEL) qui peut fournir une large plage de sortie et un ajustement sans scintillement de l'intensité de la charge d'éclairage. Le dispositif de commande de charge peut comprendre un circuit de régulation de charge, un circuit de commande et un circuit de filtre (par exemple, un circuit de filtre de type "boxcar") qui fonctionne de manière différente en fonction d'un courant cible. Lorsque l'intensité de la charge d'éclairage est proche d'une intensité d'extrémité faible, le circuit de commande peut ajuster une fréquence de fonctionnement du circuit de régulation de charge en réponse au courant cible, et peut commander le circuit de filtre de manière à filtrer un signal de rétroaction de courant pendant une fenêtre de filtre qui se répète sur une base périodique. Lorsque l'intensité de la charge d'éclairage est proche d'une intensité d'extrémité élevée, le circuit de commande peut commander le circuit de filtre de manière à filtrer constamment le signal de rétroaction de courant.

Also published as
MXMX/a/2020/003171