Display device
AssigneeHitachi Displays, Ltd.
InventorsHidetsugu Matsukiyo, Yasuhide Kashiwakura
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Abstract
The present invention can further enhance the light emission characteristics of phosphor excited by the irradiation of electron beams of high density. In a cathode ray tube including a phosphor film, a faceplate panel which constitutes a screen, an aluminum vapor-deposited film, a funnel and an electron gun, phosphor which constitutes the phosphor film applied to the faceplate panel is constituted of a terbium activated phosphor which is produced by substituting a portion of yttrium (Y) in base material crystals which contain zinc (Zn), yttrium (Y), silicon (Si) and oxygen (O) as main constitutional elements with terbium ion (Tb3+) and a trace amount of rare earth element ion is added to the terbium activated phosphor.
Claims3
A display device comprising:
- an electron source;
- a phosphor layer which emits light when the phosphor layer is excited by electron beams from the electron source;
- and
- a panel on which the phosphor layer is formed, wherein
- phosphor which constitutes the phosphor layer is formed by adding at least one of ytterbium ion (Yb3+) or samarium ion (Sm3+) to a terbium ion (Tb3+) activated phosphor which contains zinc (Zn), yttrium (Y), silicon (Si) and oxygen (O) as base materials.
Dependencies are inferred from the claim text.