Abstract
We have developed technologies for a high‐output light source consisting of blue laser diodes and a reflective phosphor wheel for next generation 4K Ultra‐Short‐Throw Projector, and have achieved a fluorescence output of 87 W. As far as we know, it is the highest fluorescence output for projectors. We adopted a newly developed phosphor cooling mechanism and an inorganic binder for high reliability of the phosphor wheel. Therefore, no deterioration in the phosphor wheel could be observed over a time period of 7,500 hours. In this paper, we report on these lightsource technologies for achieving high output and high reliability.
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