Electron beam apparatus and image display apparatus therewith

Details Electron beam apparatus and image display apparatus therewith Electron beam apparatus and image display apparatus therewith

2010-04-29

2011-10-11

Guharay, Karabi (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S495000, C313S496000, C313S306000

Reexamination Certificate

active

08035294

ABSTRACT:
In an electron beam apparatus including an electron emission element and an anode, the electron emission element includes a gate5and a cathode6having a projection portion. The gate5and the cathode6are located in a surface of an insulating member3including a recess7. The projection portion of the cathode6has a height distribution, and an average value dav (m) of a shortest distance between the gate5and the projection portion of the cathode6and a difference h (m) between the average value dav and a shortest distance dmin (m) from the gate5to a maximum convex portion of the projection portion of the cathode6satisfy a relationship of h/dav<0.39.

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