| 摘要 |
A light source switching device for use in a projection system is provided. The light source switching device comprises at least two light guiding devices and at least one phase switching device. The phase switching device is disposed between the two light guiding devices and adapted to be in one of a first status and a second status. When the first light travels into the light source switching device, the phase switching device is capable of being in the first status such that the first light is adapted to emit out from the outlet surface. When the second light travels into the light source switching device, the phase switching device is capable of being in the second status such that the second light is adapted to emit out from the outlet surface. With the switching operation of the phase switching device, the plural lights provided by plural light sources would be selected and uniformized by the light source switching device.
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