Crt lensing electrodes having tapered apertures

Details Crt lensing electrodes having tapered apertures Crt lensing electrodes having tapered apertures

H - Electricity

01

J

313/35.14

H01J 29/48 (2006.01) H01J 29/50 (2006.01) H01J 29/58 (2006.01)

Patent

CA 1216879

18 Abstract CRT Lensing electrodes having tapered apertures. The invention pertains to an improved lensing means employed in compact plural beam in-line CRT electron gun assemblies resulting in small round spot sizes on the screen. This is effected by forming co- operating tapered apertures in a low potential lensing electrode and similar facing apertures in an adjacent high potential lensing electrode. The larger openings of the two sets of facing tapered apertures provide lenses of larger than normal dimensions. Additionally, partial over- lapping of the apertures permits even larger lenses in the available electrode areas, thereby effecting further improved lensing of the beams.

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