| 摘要 |
PURPOSE:To improve the color effect by spreading a mixture in which red, green, and blue phosphors are mixed in a specific proportion with calcium halophosphate activated with Sb and Mn at a color temperature of 2,500-3,500 deg.K. CONSTITUTION:The sum of mixing proportions of europium activated yttrium oxide phosphor, terbium activated yttrium silicate phosphor, and europium activated strontium-barium chlorophosphate phosphor having luminance concentrated in regions of red, green, and blue wavelength respectively is limited up to 50-90wt%, and residual mixing proportion (10-50wt%) of calcium haloophosphate phosphor activated with Sb-Mn at a color temperature of 2,500-3,500 deg.K with a time of afterglow longer (0.01 second) than that of said phosphors and a smaller specific gravity (3.0) is mixed to form a phosphor mixture 3, the mixture 3 is spread on the internal surface of a glass 1, and a color temperature of the lamp is adjusted in a range 2,500-2,900 deg.K. Thus, the color effect can be improved, and the deviation of hue can be prevented. |
