Electron beam apparatus and image display apparatus using the same
AssigneeCanon Kabushiki Kaisha
InventorsTakeo Tsukamoto, Ouichi Kubota
Life of this patent
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Abstract
There is provided a new electron beam apparatus which improves the instability of an electron emission characteristic and provides a high efficient electron emission characteristic. The electron beam apparatus includes: an insulating member having a recess on its surface; a cathode having a protruding portion extending over the outer surface of the insulating member and the inner surface of the recess; a gate positioned at the outer surface of the insulating member in opposition to the protruding portion; and an anode positioned in opposition to the protruding portion through the gate.
Claims7
An electron beam apparatus comprising:
- an insulating member having a recess on a surface thereof;
- a cathode having a protruding portion extending from an external surface of the insulating member to an inside surface of the recess;
- a gate disposed on the external surface of the insulating member, in opposition to the protruding portion;
- and
- an anode disposed in opposition to the protruding portion so that the gate is disposed between the anode and the protruding portion.
Dependencies are inferred from the claim text.