High-brightness luminous light source

Abstract

The invention relates to a high-brightness luminous light source which comprises a first excitation light source which is used for producing excitation light, a wavelength conversion medium layer which is used for receiving the excitation light and is excited to send light with the wavelength different from that of the excitation light, and a first filtering device through which only the excitation light with a small angle can pass, wherein the first filtering device is arranged between the first excitation light source and a light path of the wavelength conversion medium layer. The high-brightness luminous light source has the following beneficial effects: under the condition that the total light input quantity is fixed, the utilization efficiency of the excitation light is higher and the brightness of the light source is higher.

Description

technical field [0001] The invention relates to a solid light source, more specifically, to a high-brightness luminous light source. Background technique [0002] The stimulated light source is a solid light source, which usually uses excitation light to make the luminescent material emit light with a wavelength different from that of the excitation light. Stimulated light sources include commonly used fluorescent light sources, which usually use LED light or laser light as excitation light, and phosphor powder as a light-emitting substance. By making the light emitted by the LED or laser act on the phosphor powder, the phosphor powder emits fluorescence. Taking LED as the fluorescent light source for excitation light as an example, usually, phosphor powder can be coated on the surface of the LED tube core, and packaged with colloid with matching refractive index, which is the most common method in the market now; it can also be used to avoid fluorescent The efficie...

AI Technical Summary

Problems solved by technology

However, in the existing phosphor powder technology, the excitation efficiency of the phosphor powder is lower than the theoretical efficiency; due to the refractive index difference between the phosphor powder and the adjacent medium, there will be partial reflection of the excitation light, or because the phosphor powder itself cannot absorb 100% The irradiated excitation light thus reflects part of the excitation light, causing the excitation light to be emitted and scattered multiple times when it is incident on the phosphor powder, and cannot be completely incident inside the phosphor layer, and is directly reflected / scattered back by the phosphor powder. The excitation light reflected or refracted by the phosphor surface above cannot be utilized, resulting in energy loss

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