Abstract: The present invention discloses an optical energy collecting system for providing optical power to a display system for showing an image. The optical energy collection system includes an optical energy collecting system for collecting optical energy from a background illumination source surrounding and illuminating on the display system whereby an optical energy provided by said optical energy collecting system to said display system for illumination is naturally adjusted according to a background illumination of the background illumination source surrounding the display system.

Abstract: A method is used to design an optical engine for increasing performance. The method is directed to positioning dichroic mirrors at proper locations, such as, on the light paths of red, green, and blue lights, or on the locations where the optical noises are to be filtered. In such manner, the dichroic mirrors can reflect the optical noises of the red, green, and blue lights generated by the optical engine into the space other than the optical engine. As a result, the red, green, and blue lights passing through the dichroic mirrors can each be a pure light.

Abstract: An optical path design for an optical system. The design includes a light source, an S-P converter, a polarizing beam splitter, and a plurality of dichroic mirrors and a plurality of color liquid crystal panels for dealing with lights of different colors. Light from the light source passes through the S-P converter and travels to a beam-splitting assembly that includes the polarizing beam splitter and the dichroic mirrors. The three primary colors within the source beam, including red, green and blue, are split so that each travels a different optical path. Dichroic mirror or optical filter is installed along the optical paths of each primary color so that strayed lights are deflected away from the optical system or absorbed. Liquid crystal panels are also installed along the optical paths of each primary color so that the primary colors are reflected back along the same optical paths towards the polarizing beam splitter.