(19)
(11) EP 1 734 561 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.01.2012 Bulletin 2012/04

(43) Date of publication A2:
20.12.2006 Bulletin 2006/51

(21) Application number: 06252923.5

(22) Date of filing: 06.06.2006
(51) International Patent Classification (IPC): 
H01J 61/32(2006.01)
H01J 61/72(2006.01)
H05B 41/36(2006.01)
H01J 61/56(2006.01)
H05B 41/24(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 06.06.2005 CN 200520102770
18.07.2005 CN 200520013346
19.09.2005 CN 200520015008
02.12.2005 CN 200520117017
26.12.2005 CN 200520134334
05.06.2006 US 422320

(71) Applicant: TBT Asset Management International Limited
Tortola (VG)

(72) Inventor:
  • Ge, Shichao
    San Jose, CA 95120 (US)

(74) Representative: Hitchcock, Esmond Antony 
Marks & Clerk LLP 90 Long Acre
London WC2E 9RA
London WC2E 9RA (GB)

   


(54) High power cold cathode straight fluorescent lamp


(57) A high power tubular CCFL device (11) comprises at least one CCFL (2); and a light transmission tube (3) having two ends, where the at least one CCFL is at a fixed location inside the light transmission tube. At least two fixtures (4) are used, one fixture at each of the two ends of the light transmission tube. At least two connectors (5) are used, one connector at each of the two ends of the light transmission tube for connection to input electric power. Preferably a portion of a driver (12; which preferably includes at least one high voltage transformer) is employed in the fixture. The fixture connects the light transmission tube, the CCFL(s) and the connector. To design a CCFL device that generates multi-color lighting for various purposes such as entertainment, two or more CCFLs may be used. A driver circuit converts input electric power to an AC output in the range of about 5 -400 volts and at a frequency in the range of about 1 kHz-800kHz. At least one high voltage transformer responds to said AC output to cause suitable voltage(s) to be supplied to each of the CCFLs to cause the CCFLs to supply light. In one embodiment, a plurality of CCFL lamp units are used, each equipped with its own driver control circuit that supplies a suitable voltage to the CCFL of such unit. Hence, the driver circuits applying AC outputs to the two or more CCFL lamp units may apply AC outputs that are different from one another, so that the two or more CCFL units are individually controlled to emit light of the same or different intensities.







Search report