Laser light source and projection display device

Abstract

The invention discloses a laser light source and a projection display device. Red light emitting efficiency is improved, and accordingly the advantage of improving overall brightness of the laser light source is achieved. The laser light source comprises an excitation light source body, a fluorescent wheel, a color filtering wheel and a control unit. The fluorescent wheel comprises a reflection portion and a transmission portion allowing the excitation light source body to transmit, and a fluorescent body capable of emitting yellow light after being excited by the excitation light source body and a fluorescent body capable of emitting green light after being excited by the excitation light source body are attached to the surface of the reflection portion. The color filtering wheel comprises a transparent portion, a red color filtering portion and a green color filtering portion. The control unit controls the fluorescent wheel and the color filtering wheel to rotate synchronously, the transparent portion of the color filtering wheel corresponds to the transmission portion of the fluorescent wheel and a part of the fluorescent body capable of emitting the yellow light after being excited by the excitation light source body, the red color filtering portion of the color filtering wheel corresponds to the other part of the fluorescent body capable of emitting the yellow light after being excited by the excitation light source body, and the green color filtering portion of the color filtering wheel corresponds to the a fluorescent body capable of emitting the green light after being excited by the excitation light source body.

Description

technical field [0001] The invention relates to the technical field of laser light sources, in particular to a laser light source and a projection display device. Background technique [0002] Traditional projection display products (referred to as projectors) use high-pressure mercury lamps (high-intensity gas discharge light sources) as projection light sources, but their service life is short, the cost of replacing bulbs is high, and mercury is highly toxic. As an alternative, the laser light source, as a solid-state light source, has a series of advantages such as high brightness, high efficiency, long life, good color gamut, and environmental protection, and has become the choice of emerging projection light sources. At the same time, as projection display products gradually move from conference rooms to homes, laser projection products have also become a new consumer electronics product and are popular with consumers. [0003] An existing laser light source uses laser...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a laser light source and a projection display device to solve the technical effect of the low light extraction efficiency of red light emitted by excited phosphors

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