Method and system for reducing moiré in displays

Details Method and system for reducing moiré in displays Method and system for reducing moiré in displays

2003-09-25

2004-11-16

Nguyen, Judy (Department: 2851)

Optics: image projectors

Distortion compensation

C353S074000, C353S032000, C353S122000

Reexamination Certificate

active

06817722

ABSTRACT:

FIELD OF THE INVENTION
This invention relates in general to projection displays and more particularly to reducing moiré in projection displays.
BACKGROUND OF THE INVENTION
Conventional lenticular projection displays often suffer from moiré. Moiré results from the improper alignment of the periodical structures with the pixel projection pitch. When a linear space between pixels aligns with a row or column of lenticular lenses on the screen, the result is moiré. Moiré appears to the viewer as bands across the display.
Conventionally, moiré is addressed by making the pitch of the lenticular lenses finer than the image pixel pitch. However, the main drawback to this conventional solution is expense. As displays become higher resolution, the lenticular lenses must become increasingly small. Lenticular screens typically become considerably more expensive and difficult to manufacture as the size of the lenticular lenses decrease.
SUMMARY OF THE INVENTION
According to principles of the present invention, In one embodiment, moiré is reduced on a lenticular screen. A projector is configured to project pixels onto the screen for display. At least a portion of the projector is disturbed to cause displacement of the projection of the pixels to reduce moiré.


REFERENCES:
patent: 5825541 (1998-10-01), Imai
patent: 6384980 (2002-05-01), McKinley
patent: 6732641 (2004-05-01), Fissell
patent: 2002/0118452 (2002-08-01), Taniguchi et al.
patent: 2004/0041747 (2004-03-01), Uehara et al.

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