Overlapping Sub-Frame Projection for High Lumen Output

The patent combines multiple low-output projectors into a single projection system where their outputs are superimposed on the same screen. This merging approach achieves high lumen levels (greater than 10,000 lumens) by adding the light output of multiple projectors together, while maintaining simplicity and reliability through the use of standard, off-the-shelf projector components rather than requiring specialized high-output projector hardware.

The patent segments the color projection task across multiple projectors, with each projector dedicated to projecting a single color (red, green, or blue) continuously. This eliminates the need for color wheels and blanking periods, as each projector maintains a steady stream of its designated color without temporal multiplexing, thereby eliminating sequential color artifacts while keeping individual projector structures simple.

The patent uses overlapping projection where the output of multiple projectors is superimposed on the same screen area rather than placing tiles adjacent to each other. This merging of overlapping images eliminates visible seams between projection areas while maintaining uniform brightness across the entire projected image, as the overlap region receives light from multiple projectors simultaneously.

The patent applies local quality by assigning each projector a specialized light source optimized for its specific color function. Instead of using broad-spectrum light sources that waste energy, each projector uses a light source with spectral characteristics tailored to its designated color (e.g., red-optimized sources for red projectors), thereby achieving high spectral efficiency while using cost-effective, targeted lighting solutions rather than expensive broad-spectrum sources.