Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Reexamination Certificate
2008-01-08
2008-01-08
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
C313S306000, C313S310000, C445S059000
Reexamination Certificate
active
10541878
ABSTRACT:
An electron emission device comprising an electron emission element (1) having a lower electrode (2), an upper electrode (5) consisting of a thin film, the surface of the upper electrode (5) being exposed to external space, and a semiconductor layer (4) formed between the lower electrode and the upper electrode, a counter electrode (21) provided to face the upper electrode (5) across the external space, a fine particle charging voltage control unit (22) for applying a voltage that charges fine particles deposited on the surface of the upper electrode (5) to between the upper electrode (5) and the lower electrode (2), and flying voltage control unit (23) for applying a voltage that sends charged fine particles flying from the surface of the upper electrode (5) to between the upper electrode (5) and the counter electrode (21), wherein the fine particle charging voltage control unit is operated to charge deposited fine particles, and the flying voltage control unit is operated to sent charged fine particles flying toward the counter electrode (21).
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Hirakawa Hiroyuki
Iwamatsu Tadashi
Conlin David G.
Edwards Angell Palmer & & Dodge LLP
Sharp Kabushiki Kaisha
Tran Thuy Vinh
Tucker David A.
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