Abstract: The invention provides a rear projection display system which includes a casing, a screen, a processing module, and a plurality of micro-projectors. The screen is mounted on the casing to form a space. The processing module is disposed in the space for receiving an input image. The micro-projectors are disposed in the space, arranged in a form of an array, and respectively electrically connected to the processing module. The micro-projectors are controlled by the processing module to project an array of overlapped sub-images onto the screen. The overlapped sub-images are generated according to the input image. The processing module corrects the misalignment of the overlapped sub-images to be projected, and further synthesizes the overlapped sub-images as the input image on the screen by use of the micro-projectors.