Display device

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2005-09-06

2005-09-06

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S486000

Reexamination Certificate

active

06940221

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.

REFERENCES:
patent: 4810416 (1989-03-01), Hase et al.
patent: 5177401 (1993-01-01), Matsukiyo et al.
patent: 5363013 (1994-11-01), Matsukiyo et al.
patent: 6680004 (2004-01-01), Ono et al.
patent: 28-54635 (1989-12-01), None
PJ Born, “A study of phosphors in the yttrium oxide-silicon dioxide phase system”, Journal of Materials Science Letters 4, pp. 497-501.

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