A projection apparatus comprising: an image device, configured to convert a first illumination beam into an image beam; a lens module; and an illumination system, wherein the image device is located between the illumination system and the lens module, the illumination system comprising: a first light source comprises a first solid-state illuminating source array comprising green solid-state illuminating sources; a first collimating lens element; a second light source; a second light collimating lens element; a light combining element; and a light homogenizing element, wherein the first illumination beam passes through the light homogenizing element and is transmitted to the image device, wherein the second light source comprises a second solid-state illuminating source array (452A, 452B), and the second solid-state illuminating source array comprises a plurality of solid-state illuminating sources arranged in an array; and wherein the image beam exits the projection apparatus through the lens module and is converged to a stop, and the lens module is located between the stop and the image device, and wherein the second solid-state illuminating source array comprises red solid-state illuminating sources and blue solid-state illuminating sources, and colors of light beams emitted from the adjacent solid-state illuminating sources are different. an image device, configured to convert a first illumination beam into an image beam; a lens module; and an illumination system, wherein the image device is located between the illumination system and the lens module, the illumination system comprising: a first light source comprises a first solid-state illuminating source array comprising green solid-state illuminating sources; a first collimating lens element; a second light source; a second light collimating lens element; a light combining element; and a light homogenizing element, wherein the first illumination beam passes through the light homogenizing element and is transmitted to the image device, wherein the second light source comprises a second solid-state illuminating source array (452A, 452B), and the second solid-state illuminating source array comprises a plurality of solid-state illuminating sources arranged in an array; and wherein the image beam exits the projection apparatus through the lens module and is converged to a stop, and the lens module is located between the stop and the image device, and wherein the second solid-state illuminating source array comprises red solid-state illuminating sources and blue solid-state illuminating sources, and colors of light beams emitted from the adjacent solid-state illuminating sources are different. a first light source comprises a first solid-state illuminating source array comprising green solid-state illuminating sources; a first collimating lens element; a second light source; a second light collimating lens element; a light combining element; and a light homogenizing element, wherein the first illumination beam passes through the light homogenizing element and is transmitted to the image device, wherein the second light source comprises a second solid-state illuminating source array (452A, 452B), and the second solid-state illuminating source array comprises a plurality of solid-state illuminating sources arranged in an array; and wherein the image beam exits the projection apparatus through the lens module and is converged to a stop, and the lens module is located between the stop and the image device, and wherein the second solid-state illuminating source array comprises red solid-state illuminating sources and blue solid-state illuminating sources, and colors of light beams emitted from the adjacent solid-state illuminating sources are different.