Light source and projection system applying same

Abstract

The invention provides a light source and a projection system applying the same. The light source comprises a solid-state light source array, a wavelength conversion device and a reshaping device, wherein the solid-state light source array consists of a plurality of solid-state light emitting devices for emitting exciting light; the wavelength conversion device is loaded with a wavelength conversion material which is used for absorbing the exciting light and generating excited light; and the reshaping device is positioned between the solid-state light source array and a color wheel and is used for carrying out reshaping processing on the exciting light emitted from the solid-state light source array so that light spots of the exciting light emitted from the solid-state light source array, which is projected to the wavelength conversion material, have specific shapes. According to the embodiment of the invention, the power density of light on the wavelength conversion material is lower, and the light conversion efficiency of the wavelength conversion material is improved.

Description

Technical field [0001] The present invention relates to the field of projection technology, in particular to a light source and a projection system for its application. Background technique [0002] Projectors using solid-state light-emitting devices, such as solid-state semiconductor light-emitting devices, especially light-emitting diodes (LEDs, Light Emitting Diodes), have been used more and more widely. Complying with the increasing requirements for the light output power of the light source, the projector light source based on light wavelength conversion stands out because of its strong practicability. This solution projects high-power light from a group of solid-state light sources onto the wavelength conversion material It is excited to produce high-power output light with a predetermined dominant wavelength. See figure 1 , figure 1 It is a schematic diagram of the structure of a projector light source in the prior art. Such as figure 1 As shown, the projector light sour...

AI Technical Summary

Problems solved by technology

Through research on the prior art, the inventors of the present invention have found that: because solid-state light sources often use high-power LEDs, or even laser diodes with high power density, or as the scale of the solid-state light source array expands, the figure 1 The excitation light power at the J point shown is often too high, which will cause the temperature of the wavelength conversion material (such as phosphor) to rise, resulting in a decrease in the light conversion efficiency of the wavelength conversion material and shortening the service life of the wavelength conversion device.

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