| 摘要 |
PURPOSE:To obtain three-wavelength region luminous type fluorescent lamp which provides excellent efficiency and coloration and ensures high psychological brightness by employing structure of four element phosphor materials of blue, blue green, green and red and satifying chromaticity region enclosed by particular four points on the xy chromaticity coordinates. CONSTITUTION:The phosphor material of a high chromaticity three-wavelength region luminous type fluorescent lamp is composed of the blue element phosphor material [(Sr, Ca, Ba, Eu)10(PO4)6C2], blue-green element phosphor material [(Sr, Eu)4Al14O25], green element phosphor material [(La, Ce, Tb)PO4], and red element phosphor material [(Y, Eu)2O3]. Simultaneously, the chlomaticity region enclosed by four points of (0.308, 0.328).(0.310, 0313).(0.318, 0.320).(0.316, 0.336) on the chlomaticity coordinates is satisfied. This fluorescent lamp ensures that light flux of lamp is high, coloration is excellent and also provides high characteristics including psychological brightness such as the light is fresh and cool and the face looks fair-skinned. |
