A light source system and a projection system applying the same

Abstract

The invention relates to a light source system and a projection system. The light source system includes a light emitting unit, optical path switching unit, wavelength conversion unit, and first and second beam splitting units, wherein the light emitting unit emits a light beam, the optical path switching unit switches the light beam emitted by the light emitting unit into a first optical path ora second optical path, the first beam splitting units are arranged at the tail ends of the first optical path and the second optical path and used for guiding incident beams to the wavelength converting unit or second beam splitting unit, the first beam splitting units are further configured to guide the light beam emitted by the wavelength converting unit after wavelength conversion to the secondbeam splitting unit, the second beam splitting unit is used for sequentially emitting the incident beams after splitting, and the second optical path passes through between the wavelength convertingunit and the first beam splitting unit, and the height of the second optical path in at least one dimension direction is lower than that of the wavelength converting unit in the dimension direction. By using the invention, the light energy utilization rate is high and the structure is compact.

Description

technical field [0001] The invention relates to the field of projection display, in particular to a light source system and a projection system using the light source system. Background technique [0002] The current projection system using a single-chip spatial light modulator generally uses an excitation light source to irradiate the rotating color wheel to form the three primary colors of red, green, and blue that are emitted sequentially, and the three primary colors of red, green, and blue that are emitted sequentially The light is projected onto the spatial light modulator for modulation, and the modulated monochromatic light images are quickly alternately switched on the screen, and then the monochromatic light images of each sequence are mixed together to form a color image by using the residual visual effect of the human eye. Red, green, and blue phosphors are coated on the color wheel to obtain the three primary colors of red, green, and blue light. However, the li...

AI Technical Summary

Problems solved by technology

Red, green, and blue phosphors are coated on the color wheel to obtain the three primary colors of red, green, and blue light. However, the light conversion efficiency of red phosphors is low, resulting in the use of single-chip spatial light modulation projection The image brightness of the red light part of the system is low, which affects the overall image display effect

Due to the low brightness of the single-chip spatial light modulator, at present, project projection with a luminous flux of more than 20,000 lumens is realized by a 3-chip spatial light modulator, but the projection system using a 3-chip spatial light modulator is bulky. The rear focal length of the projection lens is long, the requirements for the lens are high, and the price is expensive

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