Picture tube device having lead electrode with a curved shape

Details Picture tube device having lead electrode with a curved shape Picture tube device having lead electrode with a curved shape

2005-09-13

2005-09-13

Guharay, Karabi (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

C313S409000, C313S414000

Reexamination Certificate

active

06943491

ABSTRACT:
In a picture tube device with a field-emission cold cathode, including a plurality of electron-emitting cathodes, and a lead electrode provided with a plurality of apertures surrounding the plurality of electron-emitting cathodes respectively, a surface of the lead electrode has a curved shape that is convex in an electron emission direction. This makes it possible to obtain a high-resolution and high-performance picture tube device that has an excellent focus performance over an entire beam current.

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