Patent ID: 8870382
Filing Date: 2014-10-28
Classification: G02B

Abstract:
1. A method of reducing speckles seen by a viewer in a liquid-crystal display with coherent illumination comprising the steps of: providing a liquid-crystal display with coherent illumination comprising at least a matrix of holographic elements on light waveguides, a matrix of liquid crystal elements, a matrix of moveable micromirrors, and a polarization analyzer, where the matrices are packed together into a layered structure and where holographic elements, liquid crystal elements, and moveable micromirrors of the respective matrices are aligned and have substantially equal dimensions; producing an image that may contain a speckle pattern on the liquid crystal display by propagating the light along the waveguides to the holographic elements, emitting the light from the holographic elements in the form of beams toward the micromirrors, reflecting the beams from the moveable micromirrors toward a viewer through the respective liquid crystal elements thus changing polarization of the beams and converting them into beams that carry information; passing the beams that carry image information through the polarization analyzer, thus converting the beams into beams that carry a visible image; and repeating the image-producing step and the step of passing the beams through the polarization analyzer with reproduction of a speckle-pattern containing image; and averaging the speckles seen by the viewer by moving the moveable mirrors and thus reproducing the image each time in a different position.