Light source system and projection system using the same

Abstract

The invention relates to a light source system and a projection system. The light source system includes a first light source, a spectroscopic device, a wavelength conversion device and a light guide device. The first light source emits first light, and the wavelength conversion device at least includes a first color light region and a second The color light areas cut into the exit path of the first light in turn in time sequence, the first color light area generates the second light under the excitation of the first light and emits the second light to the light splitting device, the second color light area reflects the first light to the light splitting device, The beam splitting means guides the first light onto a light path and the second light to the light guide, or guides the second light onto the light path and guides the first light to the light guide, the light guide will The first light or the second light is reflected to the spectroscopic device and guided to the light path by the spectroscopic device. The invention improves the color and brightness of the light source and reduces the volume of the light source.

Description

technical field [0001] The invention relates to the field of projection display, in particular to a light source system and a projection system using the light source system. Background technique [0002] At present, spatial light modulators are widely used in the field of projection display. Spatial light modulators generally include LCD, LCOS, DMD, etc. The single-chip spatial light modulator projection system realizes color projection display based on sequentially switched primary color light. The structure is simple, the cost is low, etc., and it is widely used in the low-end market. In terms of light sources for projection systems, US Patent No. 7,547,114B2 provides a method for semiconductor lasers to excite different fluorescent pink segments on the color wheel to form different primary color lights. This method has the advantages of high light efficiency and small etendue, so it is developing rapidly. Ideal as a projector light source. Since the spectral bandwidth ...

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Problems solved by technology

And the area B in the fluorescent area 2041 is usually set as a scattering powder, and the excitation light is scattered and reflected in the form of Lambertian light, which coincides with the fluorescent light path. The outside of the area is a total reflection mirror, so the blue light reflected by the color wheel 204 has a loss of light effect when passing through the area beam splitter 202

[0008] Structurally, since the fluorescent area 2041 and the filter area 2042 are both arranged on the color wheel 204, the diameter of the color wheel 204 will be much larger than the diameter of the lens, so the overall volume of the light source will be limited by the diameter of the color wheel 204, and it cannot be achieved. ultra thin

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