Lighting system and projection device

Abstract

The invention provides a lighting system and a projection device. The lighting system comprises a first laser light source module for providing a first laser beam, a second laser light source module for providing a second laser beam and a third laser beam, a wavelength conversion module, a first light splitting unit and a second light splitting unit. The first laser beam, the second laser beam andthe third laser beam are emitted from the first laser light source module and the second laser light source module along a first direction respectively. The wavelength conversion module converts thefirst laser beam into an excited beam. The first light splitting unit and the second light splitting unit are substantially non-parallel, and one of the first light splitting unit and the second lightsplitting unit forms an illumination beam by the excited beam, the second laser beam and the third laser beam. The lighting system and the projection device have the advantages of small size and concise light path design.

Description

technical field [0001] The present invention relates to an optical system and an optical device including the above optical system, and in particular to an illumination system and a projection device. Background technique [0002] Recently, projection devices based on solid-state light sources such as light-emitting diodes (LEDs) and laser diodes (laser diodes) gradually occupy a place in the market. Generally speaking, the excitation light of these solid-state light sources will be converted by the wavelength conversion material on the wavelength conversion module in the projection device to generate converted light of different colors. And in order to meet the requirement of color performance, a filter module is placed on the rear optical path of the projection device, and the converted light on the wavelength conversion module filters out predetermined color light after passing through the filter module. These colored lights are modulated by the light valve to project th...

AI Technical Summary

Problems solved by technology

[0004] However, the optical path design of the above-mentioned projection device requires the existence of both a short-wavelength blue light source for exciting the phosphor and a long-wavelength blue light source for providing blue light, and the long-wavelength blue light does not need to pass through the wavelength conversion module, so the short-wavelength blue light The light source and the long-wavelength blue light source will be located on different optical paths, so that the overall device needs a larger volume to provide the space required for the optical path design

[0005] In addition, it is known that there is another way to obtain red light or improve the performance of red light by adding an auxiliary light source. The laser is combined, and the blue light source is arranged in a conjugate arrangement relative to the color separation element, so it will also be located on a different optical path from the blue light source, and the overall device will still require a larger volume to provide the optical path space required for design

Images