| 简介 |
PROBLEM TO BE SOLVED : To provide a green phosphor which has color reproducibility equivalent to that of a cold cathode ray tube and is used for improving luminance; a white LED; a back light using it; and a liquid crystal display device.
SOLUTION : The white LED is prepared by using, as the green phosphor, a phosphor consisting of a cerium- and terbium-activated rare earth borate compound virtually represented by general formula 1 : M(1-x-y)CexTbyBO3 (wherein M is at least one kind of element selected from among Sc, La, and Lu; 0.03
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