| 摘要 |
PROBLEM TO BE SOLVED: To provide a high luminance, high-resolution, and thin display device which does not consume much electric power, and an illuminator thereof. SOLUTION: In a color display device which is provided with a GaN-based light-emitting diode array on a substrate 1 and a red phosphor 5, a green phosphor 6, and a blue phosphor 7 correspondingly to each GaN-based light-emitting diode 2 and causes the phosphors phosphors 5, 6, and 7 to emit light by exciting the phosphors 5, 6, and 7 with light emitted from each diode 2, the phosphors 5, 6, and 7 are constituted of crystals having crystal grain diameters, which are twice that of the exciton Bohr radius or smaller. It is also possible to use the blue light rays emitted from the diodes as they are without providing the blue phosphor 7. When a white phosphor is used, a white illuminator can be obtained. |
