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Machine translation
1. (WO2011021096) APPARATUS AND METHODS OF OPERATION OF PASSIVE AND ACTIVE LED LIGHTING EQUIPMENT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2011/021096    International Application No.:    PCT/IB2010/002052
Publication Date: 24.02.2011 International Filing Date: 20.08.2010
IPC:
H05B 41/16 (2006.01)
Applicants: CITY UNIVERSITY OF HONG KONG [CN/CN]; Room 401 Office Tower Festival Walk 80 Tat Chee Avenue Kowloon SAR (HK) (For All Designated States Except US).
HUI, Ron, Shu, Yuen [AU/CN]; (HK) (For US Only).
CHEN, Wu [CN/CN]; (CN) (For US Only)
Inventors: HUI, Ron, Shu, Yuen; (HK).
CHEN, Wu; (CN)
Agent: GEE, Owen; Level 9 Cyberport 1 100 Cyberport Road Pokfulam (HK)
Priority Data:
12/544,545 20.08.2009 US
12/582,620 20.10.2009 US
PCT/IB2010/000891 21.04.2010 IB
Title (EN) APPARATUS AND METHODS OF OPERATION OF PASSIVE AND ACTIVE LED LIGHTING EQUIPMENT
(FR) APPAREILS ET PROCÉDÉS DE FONCTIONNEMENT D'ÉQUIPEMENTS D'ÉCLAIRAGE À DEL PASSIF OU ACTIFS
Abstract: front page image
This invention is concerned with the control and design of a passive or an active LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15,000 hours, the proposed system can be developed with robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. The proposed circuits can become dimmable systems if the AC input voltage can be adjusted by external means.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)