Light source and projection system for its application

Abstract

An embodiment of the present invention provides a light source and a projection system for its application. The light source includes a solid-state light source array, which is composed of a plurality of solid-state light-emitting devices for emitting excitation light; The wavelength conversion material of light; the shaping device is located between the solid-state light source array and the color wheel, and is used for shaping the excitation light emitted by the solid-state light source array, so that the excitation light emitted by the solid-state light source array is projected onto the light spot on the wavelength conversion material have a specific shape. The embodiments of the present invention can reduce the low optical power density on the wavelength conversion material and improve the light conversion efficiency of the wavelength conversion material.

Description

technical field [0001] The 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) as light sources have been more and more widely used. Complying with the increasingly higher requirements for 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 to the wavelength conversion material Upcoming excitation produces high power output light with a predetermined dominant wavelength. see figure 1 , figure 1 It is a structural schematic diagram of a projector light source in the prior art. Such as figure 1 As shown, the pro...

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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