(19)
(11) EP 0 084 268 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.05.1984 Bulletin 1984/18

(43) Date of publication A2:
27.07.1983 Bulletin 1983/30

(21) Application number: 82307012

(22) Date of filing: 31.12.1982
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 04.01.1982 US 337047

(71) Applicant: GTE Laboratories Incorporated
 ()

(72) Inventors:
  • Budinger, Bowman A.
     ()
  • Byszewski, Wojciech W.
     ()
  • Proud, Joseph M.
     ()

   


(54) Single electrode beam mode fluorescent lamp for D.C. use


(57) The lamp shown herein is a beam mode fluorescent lamp for general lighting applications. The lamp comprises a light transmitting envelope (31 having a phosphor coating (37) on its inner surface, enclosing a single electrode (29) including a thermionic cathode (34) for emitting electrons and an integral anode (35) for accelerating the electrons and forming an electron beam, and a fill material, such as mercury, which emits ultraviolet radiation upon excitation. The electrode configuration provides for use of a single power source and minimal number of power leads. In addition, a separate cathode heater filament is not required.






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