EP2958401B1 - Circuit de commande de DEL et procédé associé à une commande de DEL - Google Patents
Circuit de commande de DEL et procédé associé à une commande de DEL Download PDFInfo
- Publication number
- EP2958401B1 EP2958401B1 EP14173071.3A EP14173071A EP2958401B1 EP 2958401 B1 EP2958401 B1 EP 2958401B1 EP 14173071 A EP14173071 A EP 14173071A EP 2958401 B1 EP2958401 B1 EP 2958401B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pulse width
- led driver
- pwm
- current
- controlled current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Claims (10)
- Pilote de LED (10) comprenant
une sortie adaptée pour fournir un courant commandé pour fournir un éclairage commandé à partir d'une source de lumière LED (11),
un modulateur de largeur d'impulsions présentant une fréquence de modulation de largeur d'impulsions, ci-après fréquence PWM, et adapté pour produire le courant commandé,
caractérisé en ce qu'il comprend :des moyens (14, 15) adaptés pour régler une valeur effective minimale du courant commandé correspondant à un niveau de gradation maximal d'une plage de gradation,des moyens (14, 15) adaptés pour régler la fréquence PWM à utiliser dans toute ladite plage de gradation sur la base de la valeur effective minimale réglée du courant commandé. - Pilote de LED (10) selon la revendication 1, dans lequel le pilote de LED (10) comprend un convertisseur de sortie (13) adapté pour produire du courant présentant une grandeur nominale constante, dans lequel le modulateur de largeur d'impulsions est adapté pour moduler par largeur d'impulsions le courant du convertisseur de sortie (13) pour produire le courant commandé.
- Pilote de LED (10) selon la revendication 2, dans lequel le convertisseur de sortie (13) est un convertisseur dévolteur présentant une fréquence de commutation plus grande que la fréquence PWM du modulateur de largeur d'impulsions.
- Pilote de LED (10) selon la revendication 3, dans lequel la sortie du modulateur de largeur d'impulsions commande le convertisseur dévolteur (13) de sorte que pendant des périodes actives du signal modulé par largeur d'impulsions la sortie du convertisseur dévolteur (13) est activée.
- Pilote de LED (10) selon l'une quelconque des revendications précédentes 1 à 4, dans lequel les moyens (14, 15) adaptés pour régler la valeur effective minimale du courant commandé comprennent des moyens d'entrée (14) pour recevoir des informations de gradation maximale.
- Pilote de LED (10) selon l'une quelconque des revendications précédentes 1 à 5, dans lequel les moyens (14, 15) adaptés pour régler la fréquence PWM du modulateur de largeur d'impulsions comprennent au moins deux valeurs présélectionnées de fréquences PWM qui sont sélectionnables sur la base des informations de gradation maximale.
- Procédé en lien avec un pilote de LED comprenant
fournir (21) un courant commandé à une sortie du pilote de LED pour fournir un éclairage commandé à partir d'une source de lumière LED,
employer (22) un modulateur de largeur d'impulsions présentant une fréquence PWM pour produire le courant commandé,
caractérisé en ce qu'il comprend
régler (23) une valeur effective minimale du courant commandé correspondant à un niveau de gradation maximal d'une plage de gradation,
régler (24) la fréquence PWM du modulateur de largeur d'impulsions à utiliser dans toute ladite plage de gradation sur la base de la valeur effective minimale réglée du courant commandé. - Procédé selon la revendication 7, dans lequel le procédé comprend
produire un courant présentant une grandeur nominale constante avec un convertisseur de sortie (13) du pilote de LED, et
moduler par largeur d'impulsions le courant du convertisseur de sortie (13) pour produire le courant commandé. - Procédé selon la revendication 7 ou 8, dans lequel régler (23) la valeur effective minimale du courant commandé comprend recevoir des informations de gradation maximale.
- Procédé selon la revendication 9, dans lequel
régler (23) la fréquence PWM comprend sélectionner, sur la base des informations de gradation maximale, la fréquence PWM à partir d'au moins deux valeurs présélectionnées de fréquences PWM sélectionnables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14173071.3A EP2958401B1 (fr) | 2014-06-19 | 2014-06-19 | Circuit de commande de DEL et procédé associé à une commande de DEL |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14173071.3A EP2958401B1 (fr) | 2014-06-19 | 2014-06-19 | Circuit de commande de DEL et procédé associé à une commande de DEL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2958401A1 EP2958401A1 (fr) | 2015-12-23 |
| EP2958401B1 true EP2958401B1 (fr) | 2017-10-18 |
Family
ID=50943225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14173071.3A Active EP2958401B1 (fr) | 2014-06-19 | 2014-06-19 | Circuit de commande de DEL et procédé associé à une commande de DEL |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP2958401B1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6724158B1 (en) * | 2002-10-28 | 2004-04-20 | Honeywell International Inc. | Power linearization technique for controlling the luminance of light emitting display devices |
| US9107257B2 (en) * | 2011-02-24 | 2015-08-11 | Osram Sylvania Inc. | Adaptive frequency control to change a light output level |
| JP5834236B2 (ja) | 2011-05-12 | 2015-12-16 | パナソニックＩｐマネジメント株式会社 | 固体光源点灯装置およびそれを用いた照明器具 |
| US9093907B2 (en) * | 2012-03-14 | 2015-07-28 | Marvell World Trade Ltd. | Method and apparatus for starting up |
-
2014
- 2014-06-19 EP EP14173071.3A patent/EP2958401B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2958401A1 (fr) | 2015-12-23 |
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