| 摘要 |
PROBLEM TO BE SOLVED: To provide a display switching device by which chromaticity of white light can be easily adjusted.SOLUTION: A display switching device 1 includes: a wavelength conversion layer 8 having a double layer structure comprising a first phosphor 6 in a lower layer and a second phosphor 7 in an upper layer, the second phosphor emitting light with a fluorescent wavelength longer than the fluorescent wavelength of the first phosphor 6; and first and second light emitting diodes 2, 3 selectively exciting the wavelength conversion layer 8. By switching the first and second light emitting diodes 2, 3 to emit light, first white display is performed by the combination of the first light emitting diode 2 and the wavelength conversion layer 8, and second white display is performed by the combination of the second light emitting diode 3 and the wavelength conversion layer 8. |
