Illumination apparatus and projection apparatus

A projection apparatus, comprising:

• an illumination apparatus, comprising:
• a first light emitting device, capable of providing a first light beam;
• a first phosphor layer, disposed on the transmission path of the first light beam, wherein when the first light beam is transmitted to the first phosphor layer, the first phosphor layer is excited to produce a first color beam;
• a second light emitting device, disposed opposite to the first light emitting device for providing a second light beam;
• a second phosphor layer, disposed on the transmission path of the second light beam, wherein when the second light beam is transmitted to the second phosphor layer, the second phosphor layer is excited to produce a second color beam;
• and
• a beam combining element, disposed between the first phosphor layer and the second phosphor layer, wherein the beam combining element is capable of reflecting the first color beam from the first phosphor layer and the second color beam from the second phosphor layer, and the illumination apparatus is capable of providing an illumination light beam;
• a light valve, disposed on the transmission path of the illumination light beam, and the light valve is capable of converting the illumination light beam into an image light beam;
• and
• a projection lens, disposed on the transmission path of the image light beam and being capable of projecting the image light beam onto a screen, wherein a portion of the first light beam passes through the first phosphor layer and the beam combining element and is transmitted to the second phosphor layer to produce the second color beam by excitation, and a portion of the second light beam passes through the second phosphor layer and the beam combining element and is transmitted to the first phosphor layer to produce the first color beam by excitation.