Projection illumination system

Abstract

The invention discloses a projection illumination system, which comprises a first laser light source array, a second LED light source, an LED collimating lens group, a fluorescent wheel, a fluorescent collimating lens group, a light guide system, a condensing lens and a light wand, the light guide system comprises a first dichroic mirror and a second dichroic mirror, and the light guide system divides a first wavelength laser beam into two parts, the first part of the first-wavelength laser beam is reflected to the light bar by the first dichroic mirror, and the second part of the first-wavelength laser beam penetrates through the second dichroic mirror and is excited by the fluorescent wheel to generate a third-wavelength illumination beam; the second LED light source provides a second wavelength illumination light beam; according to the illumination light path, the light energy utilization rate is improved while the size of the whole illumination system is reduced.

Description

technical field [0001] The invention relates to the technical field of laser projection display, in particular to a projection lighting system. Background technique [0002] In recent years, projectors are widely used in business, education, engineering and home. Consumers' performance requirements for projection systems are also constantly improving, including brightness, color gamut, contrast, lifespan and cost performance. [0003] The lighting system plays a vital role in the performance of the projector. Normally, the lighting system needs to convert the light energy provided by the light source into red, green, and blue lighting beams and converge them to DMD (digital micromirror device) or liquid crystal panel, and finally display a color image on the screen through the projection lens. [0004] At present, due to the high conversion efficiency of semiconductor materials required for blue lasers and mass production, their costs are usually low. However, red and gre...

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned projection lighting system, the fluorescence excitation area and the blue light transmission area are included on the fluorescent wheel at the same time, and an additional blue light path needs to be provided, thereby increasing the volume of the entire lighting system.

In addition, the currently commonly used Ce:YAG yellow phosphor has a spectral range from green to red, so a large amount of useless light will be filtered out in actual lighting, resulting in a waste of light energy

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