Multicathode electron gun with equal temperature dependent...

Details Multicathode electron gun with equal temperature dependent... Multicathode electron gun with equal temperature dependent...

H - Electricity

01

J

313/35.14

H01J 29/48 (2006.01) H01J 29/04 (2006.01)

Patent

CA 1080778

Abstract An in-line electron gun assembly for a color television picture tube has a center cathode disposed between two outer cathodes. The cathodes are substantially coplanar and each is supported at a predetermined distance from a control grid by a separate cathode support structure. Each cathode support structure includes a cathode eyelet. The center cathode eyelet is formed of a material having a smaller coefficient of thermal expansion than that of the two outer cathode eyelets so that the variations in cathode- to-grid spacing due to temperature changes during warm-up are kept substantially equal from cathode to cathode. -1-

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