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US 2004/0169826 A1Published application
Reduction of moire effect in pixelated rear-projection displays
AssigneeTexas Instruments Incorporated
InventorsDana J. Segler JR., Adam J. Kunzman
Life of this patent
Estimating the term…
Abstract
An apparatus and method for reducing the moiré effect in rear-projection displays by rotating the dark-stripe structure (711, 712) in the screen (71) 45±15 degrees relative to the displayed pixel structure. By rotating the dark-stripes (711) relative to the displayed pixels, the spatial frequency at which the moiré effect sets in can be improved by 15% to 41%.
Claims40
The method of reducing the moiré effect, the method comprising:
- providing an image projector for projecting an image bearing beam of light along an image path;
- and
- providing a display screen on said image path such that said image bearing beam forms an image comprised of a plurality of rows of pixels when said image bearing beam strikes said display screen, said display screen having a plurality of light impeding stripe structures oriented 45±15 degrees relative to said rows of pixels in said image.
A rear-projection display screen comprising:
- a lenticular lens layer having shaped lens elements for receiving modulated light;
- a dark-stripe layer attached to said lenticular lens layer, said dark-stripe layer comprising a plurality of dark-stripes separated by stripes allowing said modulated light to pass through said dark-stripe layer, said dark-stripes rotated 45±15 degrees relative to an edge of said screen.
A display, comprising:
- a projection engine projecting an image bearing beam of light along a light path, said image borne by said image bearing beam of light comprised of a plurality of rows of pixels;
- a display screen positioned to receive said image bearing beam of light, said screen having a dark-stripe structure rotated 45±15 degrees relative to said rows of pixels.
A display, comprising:
- a projection engine projecting an image bearing beam of light along a light path, said image borne by said image bearing beam of light comprised of a plurality diagonal groups of pixels having abutting sides;
- a display screen positioned to receive said image bearing beam of light, said screen having a dark-stripe structure oriented 45±15 degrees relative to said diagonal groups of pixels having abutting sides.
Dependencies are inferred from the claim text.