Light source system

Abstract

The invention discloses a light source system which comprises a laser light source and a wavelength conversion device. The wavelength conversion device comprises a bearing body which comprises a first surface and a second surface arranged opposite to the first surface; the first wavelength conversion part is arranged on the first surface of the bearing body; the second wavelength conversion part is arranged on the first surface of the bearing body; an excitation light beam emitted by the laser light source irradiates the surfaces of the first wavelength conversion part and the second wavelength conversion part to form light spots, and the light spot area of the first wavelength conversion part is larger than that of the second wavelength conversion part. The laser incident surfaces of the different wavelength conversion parts are arranged in different heights, so that the laser light source irradiates the surfaces of the different wavelength conversion parts to form focused and defocused light spots, the area of the irradiated light spots is increased, the laser power density can be reduced, and the temperature effect is reduced.

Description

technical field [0001] The present invention relates to the technical field of wavelength conversion, and more specifically, the present invention relates to a wavelength conversion device and a light source system thereof. Background technique [0002] In the field of laser light source technology currently used, the technology of using excitation light to irradiate fluorescent materials to emit light has become a mature laser light source technology and is used in various laser light source products. In this laser light source technology, the laser light emitted by the excitation light source is collected and focused on a turntable containing fluorescent materials on the surface to excite the fluorescent materials to emit light. [0003] The wavelength conversion device is one of the core devices of the laser light source technology, and its main form is a fluorescent color wheel. However, due to the limitation of the characteristics of the wavelength conversion material ...

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Problems solved by technology

For example, the conversion efficiency of yellow-green phosphors is relatively high, while the conversion efficiency of red phosphors is low, so the proportion of red is low, which affects the overall brightness of light output.

Therefore, one of the methods to increase the proportion of red light in the prior art is to increase the red light source, such as red LED or red laser, but the problems in this method are also very obvious, such as the increase of the system volume and the temperature effect on the The limitation of the output power of the red laser is also obvious, so the method of increasing the red light source has limitations

Another method to increase the proportion of red light in the prior art is to use long-wavelength yellow light combined with a filter to generate red light, in which the long-wavelength YAG:Ce3+ system with good thermal stability and good light saturation performance is used. The wavelength of yellow light, because the thermal effect of the yellow light source is smaller than that of the red light source, so the brightness and efficiency of the red light produced by this method are better, but because of the use of filters, the cost is increased and the structure is not good. compact

In addition, there is another way to use red phosphor, but when the red phosphor absorbs a large amount of short-wavelength light when it is irradiated with high laser power, it generates a lot of heat, and the temperature effect is particularly obvious.

[0004] It can be seen that the laser fluorescent light source that produces red light in the prior art is either high in cost and not compact in structure, or its red light efficiency and brightness are low, which restricts the improvement of the brightness and color gamut of its laser display products

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