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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP3616977ApriorityCriticalpatent/JPS53123577A/en
Publication of JPS53123577ApublicationCriticalpatent/JPS53123577A/en
PURPOSE: To provide an electrode with an electron emitting material of thorium oxide-dysprosium oxide solid solution so as to reduce the discharge voltage at the initial stage of use and improve the luminous flux sustaining rate.