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1. WO1997050168 - POWER SUPPLY FOR LIGHT EMITTING DIODE ARRAY

Publication Number WO/1997/050168
Publication Date 31.12.1997
International Application No. PCT/US1997/010514
International Filing Date 16.06.1997
Chapter 2 Demand Filed 14.01.1998
IPC
H02J 9/06 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
9Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
04in which the distribution system is disconnected from the normal source and connected to a standby source
06with automatic change-over
H02M 1/00 2007.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
H05B 33/08 2006.01
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
H02J 9/065
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
9Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
04in which the distribution system is disconnected from the normal source and connected to a standby source
06with automatic change-over ; , e.g. UPS systems
062for AC powered loads
065for lighting purposes
H02M 1/4208
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
4208Arrangements for improving power factor of AC input
H05B 45/00
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
H05B 45/14
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
14using electrical feedback from LEDs or from LED modules
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
Y02B 70/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
70Technologies for an efficient end-user side electric power management and consumption
10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Applicants
  • HOCHSTEIN, Peter, A. [US]/[US]
Inventors
  • HOCHSTEIN, Peter, A.
Agents
  • MILTON, Harold, W., Jr.
Priority Data
08/673,20027.06.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) POWER SUPPLY FOR LIGHT EMITTING DIODE ARRAY
(FR) ALIMENTATION ELECTRIQUE POUR RESEAU DE DIODES ELECTROLUMINESCENTES
Abstract
(EN)
An apparatus (10) for supplying regulated voltage d.c. electrical power to an LED array (12) includes a rectifier (32) responsive to a.c power for generating rectified d.c. power and a power factor correcting and voltage regulating buck/boost switchmode converter (38) responsive to the rectified d.c. power for generating regulated voltage d.c. power to illuminate the LED array (12). A battery backup system (62) receives the a.c. power applied to the rectifier (32) for charging a rechargeable battery (66) and sensing an a.c. power failure. A switch-over relay (82) is connected between the battery backup system (62) and the rectifier. Upon sensing a failure of the a.c. power, the battery backup system (62) controls the switch-over relay (82) to connect the battery backup system (62) to the rectifier (32) to provide d.c. power to the switchmode converter (38) to illuminate the LED array (12). A half wave power detector (88) causes the apparatus (10) to reduce regulated d.c. power to dim the LED array (12).
(FR)
La présente invention concerne un appareil (10) délivrant à un réseau de diodes électroluminescentes (12) un courant continu en tension régulée. Cet appareil (10) est constitué, d'une part d'un redresseur (32) recevant un courant alternatif et produisant un courant continu redressé, et d'autre part d'un convertisseur abaisseur-élévateur à mode de commutation (38), correcteur du facteur de puissance et régulateur de tension. Ce convertisseur (38) alimenté en courant continu délivre une tension régulée de courant continu permettant l'émission de lumière par les diodes électroluminescentes (12) du réseau. Un système d'alimentation électrique de secours à accumulateurs (62) qui reçoit le courant alternatif fourni au redresseur (32) est capable de recharger une batterie d'accumulateurs (66) et de détecter toute coupure d'alimentation en courant alternatif. Un relais de commutation (82) est monté entre le système d'alimentation électrique de secours à accumulateurs (62) et le redresseur. Dès la détection d'une coupure d'alimentation en courant alternatif, le système d'alimentation électrique de secours à accumulateurs (62) fait commuter par le relais de commutation (82) le système d'alimentation électrique de secours à accumulateurs (62) sur le redresseur (32) de façon à alimenter en courant continu le convertisseur à mode de commutation (38) afin d'assurer l'émission de lumière par les diodes électroluminescentes (12) du réseau. Un détecteur de courant demi-alternance (88) permet à l'appareil (10) de réduire le courant continu régulé de façon à atténuer l'intensité lumineuse du réseau de diodes électroluminescentes (12).
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