Method of generating area light source by scanning, scanning...

Details Method of generating area light source by scanning, scanning... Method of generating area light source by scanning, scanning...

2006-08-22

2006-08-22

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07095541

ABSTRACT:
A method of generating an area light source by scanning, an area light source and a laser projection television using the same. The method comprising the steps of illuminating a light beam onto a rotating polygon mirror rotating at a high speed on which each plane mirror has a predetermining slope angle with respect to it own rotating axis, and generating a 2-D scanning area. The invention provides a scanning area light source having uniform brightness, non-interference and high efficiency by uniform illumination of the spatial light modulator in a video display. Its scanning characteristics are that each of scanning points can cover many pixels, and that the adjacent scanning lines overlap a relatively large part to ensure uniform luminance of the scanning plane.

REFERENCES:
patent: 5865521 (1999-02-01), Hashizume et al.
patent: 6137461 (2000-10-01), Deter et al.

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