LIGHT SOURCE DEVICE AND PROJECTION DISPLAY APPARATUS
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United States of America Patent
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Issued Date -
Jul 25, 2024
app pub date -
Apr 3, 2024
filing date -
Oct 5, 2021
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Abstract
A light source device includes a light source element that emits light source light in a first wavelength region, a selective reflection element that separates the light source light into first light and second light, a first light direction conversion element that reflects the first light guided in a first direction from the selective reflection element in a second direction, and a wavelength conversion element that converts the first light into third light in a second wavelength region. The first light direction conversion element reflects the third light in a third direction opposite to the first direction. The selective reflection element transmits the third light reflected by the first light direction conversion element. The selective reflection element guides the second light and the third light in the third direction. The light source element emits the light source light in a direction different from the second direction.
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