Alternating electric field diminishing structure for cathode ray

Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means

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313479, 313413, 335210, 335212, 335214, 348820, H01J 2970, H01J 3100

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active

054303524

ABSTRACT:
A cathode ray tube device capable of providing sufficient shielding effect against leaking alternating electric field while exhibiting high reliability during long use. Alternating electric field generated by a deflection yoke is sufficiently reduced by the shielding effect produced by a conductive film formed on a funnel portion. A gap formed between the conductive film and an insulating sheet provided between the conductive film and the deflection yoke, due to dimensional error, is filled with insulating silicone grease, so as to avoid secular degradation of insulation which otherwise may occur due to accumulation of dust and other matters.

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patent: 5304891 (1994-04-01), Otsuka

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