Projection device

Abstract

A projection device includes a laser light source and a wavelength conversion assembly. The laser light source is configured to emit a first laser light having a first wavelength. The wavelength conversion assembly is configured to convert a first portion of the first laser light into a second laser light, wherein the second laser light has a second wavelength different from the first wavelength. The second laser light is reflected back to an upstream optical path of the wavelength conversion assembly through the wavelength conversion assembly, and a second portion of the first laser light is reflected to a downstream optical path of the wavelength conversion assembly through the wavelength conversion assembly.

Dependencies are inferred from the claim text.