High dynamic range, high contrast projection systems

摘要

Display devices with high dynamic ranges approaching the limitations of the human eye are discussed herein. High dynamic range projections systems may be 2D or 3D and devices may or may not be implemented with polarization preserving optics for high efficiency. In one embodiment, 2D HDR projection systems may compensate the modulator for varying transmission and contrast versus field of view. In another embodiment, 3D HDR projection systems may include a global or pixelated/segmented modulator. The global or pixelated/segmented modulator may be included in a stereoscopic polarization switch or in a polarization-preserving stereoscopic projection system. Additionally, a combination of global/global or pixelated/pixelated, or global/pixelated modulators may be used.

主权项

1. A polarization conversion system, comprising:
a light splitting element operable to receive randomly polarized image light from a projector lens, and operable to direct light with a first polarization state along a first light path and operable to direct light with a second polarization state along a second light path; a reflecting element located on the second light path and operable to receive reflected light from the light splitting element; a polarization rotator element located on the second light path and operable to receive reflected light from the reflecting element; and a modulator located on the first light path and the second light path and operable to selectively change the transmission of the first and second light path, and the modulator further operable to receive light from a high resolution spatial light modulator, wherein the high resolution spatial light modulator changes the transmission or reflection of light.