(19)
(11) EP 2 503 588 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.08.2013 Bulletin 2013/35

(43) Date of publication A2:
26.09.2012 Bulletin 2012/39

(21) Application number: 12173268.9

(22) Date of filing: 11.09.2009
(51) International Patent Classification (IPC): 
H01J 63/06(2006.01)
H01J 1/15(2006.01)
 H05B 41/14(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

(30) Priority: 12.09.2008 US 96665 P
30.03.2009 US 164853 P
30.03.2009 US 164852 P

(62) Application number of the earlier application in accordance with Art. 76 EPC:
09813685.6 / 2335265

(71) Applicant: Vu1 Corporation
Seattle, WA 98109 (US)

(72) Inventors:
  • Herring, Richard
    Longmont, CO 80504 (US)
  • Hunt, Charles E.
    Davis, CA 95616 (US)
  • Skupien, Thomas
    Rockton, IL 61072 (US)
  • Hasilik, Tomas
    779 00 Olomouc (CZ)
  • Jelinek, Viktor
    CZ / 779 00 Olomouc (CZ)
  • Vancil, Bernard K.
    Beaverton, OR 97007 (US)

(74) Representative: Kudlek & Grunert Patentanwälte 
Postfach 33 04 29
80064 München
80064 München (DE)

   


(54) Cathodoluminiscent lighting system


(57) Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun (243) having a cathode (240) for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system (100) incorporating the electron sources has an envelope (250) with a transparent face (252), an anode (242) with a phosphor layer (254) to emit light through the face and a conductor layer. The system also has a power supply (102, 104, 105, 106, 108) for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed.







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Search report