Focusing and steering electrodes for electron sources

Details Focusing and steering electrodes for electron sources Focusing and steering electrodes for electron sources

1995-05-09

1996-10-01

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313488, H01J 162

Patent

active

055613454

ABSTRACT:
Apparatus and methods of focusing and to steering a group of electrons emitted from an electron source to a shield. In a preferred embodiment, the apparatus includes an electron source controlled by one or more voltages to emit electrons, a first electrode adjacent to one side of the source, and a second electrode, insulated from the first electrode, adjacent to an opposite side of the source. The shield has a shield voltage. The first and the second electrode have a first and a second voltage respectively to focus and steer a substantial portion of the emitted electrons towards the shield. One application of the present invention is in the area of flat panel displays with the shield being a screen.

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Jones et al., "Fabrication of Silicon Point, Wedge, and Trench FEAs", Technical Digest of Int. Vacuum Microelectronics Conf., 1991.
Spindt et al., "Physical Properties of Thin-Film Field Emission Cathodes with Molybdenum Cones", Journal of Applied Physics, vol. 47, No. 12, Dec. 1976.

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