Electric lamp and discharge devices – Discharge devices having a thermionic or emissive cathode
Patent
1997-03-07
1999-04-13
O'Shea, Sandra
Electric lamp and discharge devices
Discharge devices having a thermionic or emissive cathode
313495, 313309, H01J 105
Patent
active
058941894
ABSTRACT:
A surface cold electron emission display device includes; a pair of an element-substrate and a transparent substrate sandwiching a vacuum space and facing to each other; plural ohmic electrodes disposed on the element-substrate parallel to each other; and plural cold electron emission elements made of semiconductor. Each cold electron emission element includes; a semiconductor layer formed on the ohmic electrode; a porous semiconductor layer formed on the semiconductor layer; and a metallic thin film electrode formed on the porous semiconductor layer to face the vacuum space. The device also includes; a plurality of bus electrodes formed on the metallic thin film electrodes for bridging and electrically connecting the adjacent metallic thin film electrodes and extending perpendicular to the ohmic electrodes; a plurality of collector electrode disposed on the transparent substrate parallel to each other for capturing emitted electrons from the metallic thin film electrode; and a fluorescent layer formed on the collector electrode.
REFERENCES:
patent: 5652474 (1997-07-01), Wilshaw et al.
Koshida Nobuyoshi
Ogasawara Kiyohide
Yoshikawa Takamasa
O'shea Sandra
Patel Vip
Pioneer Electronic Corporation
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