Light source device of projector, capable of enhancing brightness

Abstract

The invention discloses a light source device of a projector, capable of enhancing brightness. The light source device is characterized by comprising a blue light generation part, a red light generation part, a multi-color light generation part and a light combining device, wherein the blue light generation part is constituted by a blue light LED (light-emitting diode) light source component and a fourth lens group arranged at the front end of the blue light LED light source component; the red light generation part is constituted by a red light LED light source component and a third lens group arranged at the front end of the red light LED light source component; the multi-color light generation part comprises a blue laser generation part, a fluorescence excitation part and a first dichroic mirror placed between the blue laser generation part and the fluorescence excitation part; and blue light, red light and multi-color light are gathered into a light-combined light beam on a same light shaft through a light combining effect of the light combining device to be irradiated on a light bar. The three-color light produced by the device has good color saturation, high luminous flux and high illuminance, so that the luminescence brightness of the projector is effectively upgraded and an excellent viewing effect is achieved. In addition, due to the simple structure, the convenience in production and the low cost, the device is suitable for extensive popularization.

Description

technical field [0001] The invention relates to a projector light source device for enhancing brightness. Background technique [0002] The projectors currently on the market generally use ultra-high pressure mercury lamps as the main light source, which not only has a short lifespan, but also is expensive to replace later and pollutes the environment seriously. The disadvantage of pure LED light sources is the luminous efficiency per unit area. Insufficient, an ultra-portable projector weighing about 1 kg has a brightness of only 500 lumens, which cannot meet the brightness and color quality requirements of a home projector. The pure laser projectors sold in the market use a single blue laser light source, and both blue and green come from the same blue laser, and this technical drawback leads to a small color gamut coverage of the picture projected by the machine. Good color reproduction cannot be achieved. Moreover, the divergence angle of the laser light source is very...

AI Technical Summary

Problems solved by technology

[0002] The projectors currently on the market generally use ultra-high pressure mercury lamps as the main light source, which not only has a short lifespan, but also is expensive to replace later and pollutes the environment seriously. The disadvantage of pure LED light sources is the luminous efficiency per unit area. Insufficient, an ultra-portable projector weighing about 1 kg has a brightness of only 500 lumens, which cannot meet the brightness and color quality requirements of a home projector. The pure laser projectors sold in the market use a single blue laser light source, and both blue and green come from the same blue laser, and this technical drawback leads to a small color gamut coverage of the picture projected by the machine. Cannot achieve good color reproduction

Moreover, the divergence angle of the laser light source is very small, so it is difficult to form a uniform projection picture, and the problem of light spot is easy to appear in the picture

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