Light source system and projection device

Abstract

The invention relates to a light source system and a projection device. The projection device comprises the light source system. The light source system comprises a primary optical axis, a light source, a wheel body, an optical device, a first wavelength converter and a first angle selecting layer. The light source can provide a light beam to advance along the primary optical axis. The wheel body can rotate according to control. The optical device is provided with a first lens, a second lens and a third lens which are sequentially arranged between the light source and the wheel body along the primary optical axis to gather the light beam to a focusing position on the wheel body. The first wavelength converter is arranged on the wheel body for receiving and converting the light beam into a first waveband light. The first angle selecting layer selectively filters and passes the first waveband light at an angle and is arranged on the first wavelength converter. The first wavelength converter is positioned between the light source and the first angle selecting layer.

Description

technical field [0001] The present invention relates to a light source system, in particular to a light source system used in a projection device. Background technique [0002] Due to the advantages of light emitting diode (Light Emitting Diode, LED) with high energy conversion efficiency, high stability, long service life, and instant switching, it gradually replaces ultra high pressure mercury bulb (Ultra High Performance, UHP) as a projection lamp. Trends in light sources for installations. When a light emitting diode is used as a light source of a projection device, in order to obtain better light utilization and light distribution uniformity, it is necessary to consider the design and configuration of its internal optical elements. Among them, one of the more common ways is to directly use red, blue, and green light-emitting diodes as the light source of the projection device, and output them after combining light. However, since the luminous efficiency of green LEDs ...

AI Technical Summary

Problems solved by technology

However, since the luminous efficiency of green LEDs is low, and the heat dissipation requirement of red LEDs is relatively high, if you want to directly use red, blue, and green LEDs as light sources for a projection device, you need to properly adjust the red, blue, and green LEDs first. The quantity, configuration and heat dissipation method of green light-emitting diodes are conducive to adjusting the uniformity of the overall color

[0003] Moreover, since the light-emitting diode itself is a light source with a large divergence angle and etendue, if the etendue cannot be reduced for more effective centralized use, the projection brightness of the projection device will also be insufficient, and The problem of not being able to efficiently use the light energy emitted by light-emitting diodes

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