Patent ID: 8382292

Claim:
A light source module, adapted to be used in a projection apparatus, the light source module comprising: a first light emitting diode device capable of emitting a first light beam along a first light path during a first time period, a plurality of monochromatic light emitting diodes of the first light emitting diode device emitting light in turn when the first light emitting diode device is in a light emitting state; a second light emitting diode device capable of emitting a second light beam along a second light path during a second time period, a plurality of monochromatic light emitting diodes of the second light emitting diode device emitting light in turn when the second light emitting diode device is in a light emitting state; and a light switching element disposed at an intersection of the first light path and the second light path for permitting one of the first light beam and the second light beam to be transmitted along a third light path, the light switching element comprising a rotary disc having a transmission region and a reflection region, wherein the first light emitting diode device is in the light emitting state and the second light emitting diode device is turned off when the transmission region is rotated to the intersection of the first light path and the second light path, and the second light emitting diode device is in the light emitting state and the first light emitting diode device is turned off when the reflection region is rotated to the intersection of the first light path and the second light path, a color sequence of the light emitted in turn by the monochromatic light emitting diodes of the first light emitting diode device and a color sequence of the light emitted in turn by the monochromatic light emitting diodes of the second light emitting diode device are reverse, such that the first light emitting diode device and the second light emitting diode device are capable of emitting monochromatic lights with the same color during a spoke time so as to avoid color variance.