Green emitting yttrium silicate phosphor and cathode-ray...

Details Green emitting yttrium silicate phosphor and cathode-ray... Green emitting yttrium silicate phosphor and cathode-ray...

2007-01-09

2007-01-09

Ho, Allen C. (Department: 2882)

Electric lamp and discharge devices

Cathode ray tube

Screen

C252S30140R, C313S467000, C313S485000, C313S486000, C313S495000

Reexamination Certificate

active

10984922

ABSTRACT:
The present invention provides a green emitting yttrium silicate phosphor, which has an improved temperature characteristic and life, and a cathode-ray tube using it. A green emitting yttrium silicate phosphor according to the present invention comprises a composition having the general composition (Y, Sc, Tb)2SiO5, wherein the mole ratio of Sc to the entire rare-earth element in the phosphor is 0.045<Sc/(Y+Sc+Tb)<0.17. Adding the above concentration range of Sc improves its temperature characteristic and life. It is more preferable that the concentration range is 0.07<Sc/(Y+Sc+Tb)<0.13.

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