Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1997-08-01
1999-03-02
O'Shea, Sandra
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313632, 313309, 445 51, H01J 130, H01J 1924
Patent
active
058775889
ABSTRACT:
A field emission cathode (40) includes field emitting bodies (42) in the form of fibers, and a base body having a longitudinally extending core (41) formed by at least two wires (43) between which the fibers are secured. The fibers are distributed along at least a part of the length of the core (41) and extend radially outwards from the core. A light source (10) includes an evacuated container having walls at least a portion of which consists of an outer glass layer (23) on which at least a major part thereof is coated on the inside with a layer of phosphor (24) forming a luminescent layer, and a conductive layer forming an anode (25). The layer of phosphor (24) is excited to luminescence by electron bombardment from a field emission cathode (40) located in the interior of the container, and a modulator electrode or grid (30) is arranged between the cathode (40) and the anode (25) for creating an electric field for the emission of electrons. The field emission cathode (40) includes field emitting bodies (42) in the form of fibers, and a base body having a longitudinally extending core (41) formed by at least two wires (43) between which the fibers are secured.
REFERENCES:
patent: 4272699 (1981-06-01), Faubel et al.
patent: 5588893 (1996-12-01), Kaftanov et al.
patent: 5603649 (1997-02-01), Zimmerman
patent: 5764004 (1998-06-01), Rabinowitz
Kaftanov Vitaly Sergeevich
Olsfors Jan
Sheshin Evgenij Pavlovich
Suvorov Alexander Leonidovich
Day Michael
Lightlab AB
O'shea Sandra
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