Method of generating area light source by scanning, scanning area light source and laser projection television using the same
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United States of America Patent
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Aug 22, 2006
Grant Date -
Feb 3, 2005
app pub date -
Dec 3, 2003
filing date -
Dec 3, 2002
priority date (Note) -
Expired
status (Latency Note)
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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.
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