PROJECTION APPARATUS AND LIGHT INTEGRATION ROD FOR THE SAME
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United States of America Patent
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Issued Date -
Dec 22, 2016
app pub date -
Jun 17, 2016
filing date -
Jun 22, 2015
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Abstract
A projection apparatus includes a light source module for providing an illuminating light beam, a light integration rod disposed between the light source module and a light valve configured for converting the illuminating light beam into an image light beam, and a projection lens disposed on a transmission path of the image light beam. The light integration rod includes a light input end and a light output end opposite to the light input end; the light input end includes a plurality of first sides having a length of X1 and a plurality of second sides having a length of Y1; and the light output end includes a plurality of third sides having a length of X2 and opposite to the first sides and a plurality of fourth sides having a length of Y2 and opposite to the second sides, wherein X2/X1>Y2/Y1.
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