Light source system and projecting apparatus

Abstract

The invention relates to a light source system and a projecting apparatus. The light source system comprises a first light source, a second light source, an optical filter and a wavelength conversion apparatus. An incident angle of lights of a second spectrum range generated by the second light source on the optical filter is greater than a first angle threshold value and the lights are transmitted by the optical filter. The wavelength conversion apparatus transmits a part of the lights of the second spectrum range which is transmitted by the optical filter, and reflects the other part of the lights of the second spectrum range to the optical filter. The optical filter further reflects the other part of the lights of the second spectrum range to the wavelength conversion device, wherein the incident angle of the lights of the second spectrum on the optical filter is smaller than a second angle threshold value. The first angle threshold value is greater than the second angle threshold value. In such a way, the optical filter is set to transmit the lights of the second spectrum range which is generated by the second light source and has a big incident angle, and reflects the lights of the second spectrum angle which is reflected by the wavelength conversion device and has a small incident angle, so that the light-extraction efficiency of the light source system is improved.

Description

technical field [0001] The invention relates to the technical field of light sources for illumination and display, in particular to a light source system and a projection device. Background technique [0002] At present, many applications require the use of high-brightness color light sources, such as stage lights, projection displays, and RGB (red, green, and blue) backlights. Among them, a gas discharge lamp (for example, an ultra-high pressure mercury lamp) is a traditional high-brightness light source used in special lighting and display fields. However, because mercury is easy to cause environmental pollution, the industry is looking for an environmentally friendly light source to replace the ultra-high pressure mercury lamp. [0003] See figure 1 , figure 1 It is a structural schematic diagram of a light source system in the prior art. Such as figure 1 As shown, the light source system includes a solid state light source 101 , a lens 103 , a color wheel 104 and a ...

AI Technical Summary

Problems solved by technology

However, the red light conversion device 303 has a relatively large reflectivity for the red light 307, usually about 50%, and the red light 307 reflected by the red light conversion device 303 will return to the second light source 302 along the original path, thereby resulting in a high light extraction efficiency. lower

In addition, the red light 306

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