Laser light source with reduced beam combination operation for projection display
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United States of America Patent
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Feb 5, 2019
Grant Date -
Jan 1, 2015
app pub date -
Sep 12, 2014
filing date -
Apr 10, 2012
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Abstract
In one aspect, a light source for a projection display includes: three laser light sources, a beam combining lens, and a phosphor wheel coated with phosphor powders. Each of the first and second laser light sources outputs a first light beam and a second light beams respectively, which are respectively reflected by the beam combining lens. The third laser light source outputs a third light beam, which is projected onto the phosphor powders of the phosphor wheel. The phosphor wheel is excited by the third light beam to output a fourth light beam such that the fourth light beam is projected onto the beam combining lens. The beam combining lens reflects the first and second light beams, and transmits the fourth light beam therethrough.
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