Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1997-08-01
1999-12-28
Patel, Nimeshkumar D.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313491, 313632, 313309, 445 51, H01J 130, H01J 1924
Patent
active
060085754
ABSTRACT:
A field emission cathode has particular use in a light source. The light source includes an evacuated container having walls, at least a portion of which consists of an outer glass layer which on at least a major part thereof is coated on the inside with a layer of phosphor forming a luminescent layer and a conductive layer forming an anode. The layer of phosphor is excited to luminescence by electron bombardment from a field emission cathode located in the interior of the container. A modulator electrode is arranged between the cathode and the anode for creating an electrical field necessary for the emission of electrons. The field emission cathode, includes a base body, and field emitting bodies extending from the base body. The base body includes a longitudinally extending core having a central axis. The field emitting bodies are elongate and are distributed along at least a part of the length of the core, extend radially outwards from the core, and have free ends provided with field emitting surfaces.
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patent: 5764004 (1998-06-01), Rabinowitz
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Kaftanov Vitaly Sergeevich
Olsfors Jan
Sheshin Evgenij Pavlovich
Suvorov Alexander Leonidovich
Haynes Mack
Lightlab AB
Patel Nimeshkumar D.
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