Multi-pump light source based on fluorescent powder and projection optical engine using multi-pump light source

Abstract

Disclosed is a multi-pump light source based on fluorescent powder. The multi-pump light source comprises a first pump light source module, a second pump light source module and a dichroscope, wherein the first pump light source module sends out first pump light, the second pump light source module comprises a luminous chip which sends out second pump light and a fluorescent powder layer arranged on the luminous chip, the dichroscope guides the first pump light to be emitted into the fluorescent powder layer, the fluorescent powder layer absorbs the first pump light and the second pump light and excites fluorescence, and the dichroscope sends out the fluorescence. According to the multi-pump light source, a common excitation method of fluorescent powder by using multi-pump light is adopted, the excitation capacity of the fluorescent powder is increased, the fluorescence outgoing brightness is increased, light energy consumption of a pump is low, the utilization rate and the optical efficiency are high, and the cost is low. Besides, the invention also provides a projection optical engine using the light source.

Description

technical field [0001] The invention relates to a light source and projection display technology, in particular to a fluorescent powder-based multi-pump light source and a projection optical engine using the same. Background technique [0002] The light source is one of the most important parts of the LCD projector. Its brightness, light utilization rate and heat generation directly affect the quality of the projected image, the power consumption of the projector, the use and maintenance cost of the projector and other issues. In the past, most projectors used ultra-high pressure mercury lamps (UHP) or metal halide lamps as light sources. Although the brightness of such light sources can meet the requirements, they have high energy consumption and short life, low light conversion efficiency, and high heat generation. And it will pollute the environment, so it is not very suitable for use as a projection light source. Nowadays, more and more liquid crystal projectors start t...

AI Technical Summary

Problems solved by technology

Although the monochromatic light source with this structure has a large excitation energy of the phosphor, the energy loss of the pump light is serious, the optical efficiency is not high, and the system using this light source is relatively large.

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