Multi-light source projection system

A projection system and multi-light source technology, applied in the field of projection systems, can solve problems such as the reduction of light energy utilization rate, and achieve high efficiency utilization rate and high efficiency effect

A projection system and multi-light source technology, applied in the field of projection systems, can solve problems such as the reduction of light energy utilization rate, and achieve high efficiency utilization rate and high efficiency effect

CN1885095AInactive Publication Date: 2006-12-27ASIA OPTICAL CO INC
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  • Multi-light source projection system
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Embodiment Construction

[0012] The present invention uses the principle of decomposing high-brightness light to match low-brightness light to achieve light balance, and decomposes a high-brightness yellow-green light (second color light) into green light (third color light) and red light (fourth color light) with appropriate brightness. Combined with another blue light (first color light) to produce white light with stable color temperature.

[0013] Please refer to figure 2 As shown, a multi-light source projection system in a preferred embodiment of the present invention includes an LED controller 202, a first LED 204 that can generate blue light, a second LED 206 that can generate high-brightness yellow-green light, and can decompose the yellow-green light generated by the second LED 206 into Dichroic mirrors 208 for green light and red light with appropriate brightness, first liquid crystal light valve 210, second liquid crystal light valve 212 and third liquid crystal light valve for respective...

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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...

Claims

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Application Information

Patent Timeline
27 Dec 2006
Publication
CN1885095A
IPC
G02B27/18; H01L33/00
Inventors
吕建锋