Multi-light source projection system

Abstract

The invention relates to a multi-light source projecting system and relative light module, wherein the invention comprises: light source, light source controller, color selective dichroic mirror, liquid crystal light valve, light combine element and projection lens; the light source is formed by first and second lighting elements to supply first and second light colors; the light source controller controls the synchronous operations of light source and liquid crystal light valve; the color selective dichroic mirror divides the second color light into third and fourth color lights; the liquid crystal light valve receives the color light independently to transmit them to the light combine element; the light combine element combines the first, third and fourth color lights to be mixed to be projected to the projection lens to form light image. The invention can fully utilize the efficiency of second color light, to make the brightness of first, third and fourth ratio met with the needed final brilliance white light, to improve the light utilization.

Description

【Technical field】 [0001] The invention relates to a projection system, in particular to a multi-light source projection system and an optical module used therein. 【Background technique】 [0002] At present, the common multimedia projection systems on the market can be divided into two types according to the light sources used: projection systems using high-efficiency bulbs (UHP, Ultra High Performance) and projection systems using LED light emitting diodes (Light Emitting Diode). [0003] In a projection system using a high-efficiency bulb, the light source of the high-efficiency bulb produces high energy and high heat, and has a high energy output, which can well meet the requirements of the projector for luminous flux. But adopting this light source also has many disadvantages, such as: huge energy consumption, a lot of heat and extremely concentrated heat, short bulbs (the general lifespan is only 1000-3000 hours) and expensive. In addition, the light of this kind of lig...

AI Technical Summary

Problems solved by technology

Because the luminance of the three primary color light sources in the projection system is not the same, usually the red LED 106 has the highest single brightness, the green LED 104 takes the second place, and the blue LED 102 is the lowest. A liquid crystal light valve (not shown) is installed in front to filter out most of the excessively strong red light and green light to match the maximum brightness of blue light, which greatly reduces the utilization rate of light energy

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