OPTICAL UNIT, LIGHT SOURCE APPARATUS, AND PROJECTION TYPE DISPLAY APPARATUS
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United States of America Patent
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Issued Date -
Nov 7, 2019
app pub date -
Jul 15, 2019
filing date -
Feb 17, 2017
priority date (Note) -
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Abstract
An optical unit according to one aspect of the present invention includes a substrate, and a fluorescent layer provided on the substrate. The fluorescent layer includes an adhered portion adhered to the substrate and a non-adhered portion that is not adhered to the substrate. The substrate has a concave portion containing an air gap and an adhesive. The adhered portion is part in the fluorescent layer corresponding to a region where the adhesive is provided. An end of the fluorescent layer is located outside the concave portion.
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