| 简介 |
PROBLEM TO BE SOLVED : without expensive rare-earth element, when absorbing the light of a specified wavelength in the red light-emitting hyperchromic capable of the red phosphor and a red phosphor emitting device is provided. SOLUTION : magnesium aluminate, magnesium aluminate crystals containing manganese as a sintered body, magnesium aluminate in the sintered body, the presence of magnesium oxide crystal red phosphor. By this constitution is satisfied, to absorb light of a specified wavelength when the red light-emitting hyperchromic. Selected drawing : no |
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