Cathode ray tube

Details Cathode ray tube Cathode ray tube

1984-12-07

1988-04-26

Cooper, Jack

Electric lamp and discharge devices

Cathode ray tube

Screen

2523016S, C09K 1130, H01J 2920

Patent

active

047407280

ABSTRACT:
A cathode ray tube having a fluorescent screen of a copper and aluminum activated zinc sulfide phosphor (ZnS:Cu,Al). The ZnS:Cu,Al phosphor has a Cu activator value ranging from 3.times.10.sup.-4 to 5.times.10.sup.-3 grams per 1 gram of ZnS; an emission color point within a yellowish green region in the color coordinates of CIE color system represented by values x and y ranging from 0.295 to 0.370 and 0.570 to 0.630, respectively; a color point of body color within a yellow region in the color coordinates of CIE color system represented by values x and y ranging from 0.380 to 0.400 and 0.390 to 0.440, respectively; and a mean reflectance in the visible spectrum region of not less than 75% when the mean reflectance of a magnesium oxide diffusion plate is defined to be 100%.

REFERENCES:
patent: 4140940 (1979-02-01), Uehara et al.
patent: 4316816 (1982-02-01), Royce et al.

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