Vacuum ultraviolet excited green phosphor material and...

Details Vacuum ultraviolet excited green phosphor material and... Vacuum ultraviolet excited green phosphor material and...

2008-05-20

2008-05-20

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S584000, C313S637000, C252S30140R

Reexamination Certificate

active

10986251

ABSTRACT:
This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (Y1-x-yGdxTby)Al3-zScz(BO3)4(0≦x≦0.5, 0<y<0.5, 0<z≦3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.

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“Lighting”, Ullmann's Encyclopedia of Industrial Chemistry, 5thedition, 1999, p. 536, vol. A 15.

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