Light-emitting device and illumination device

Abstract

The invention provides a light-emitting device and an illumination device. The light-emitting device comprises a light splitting device, wherein the light splitting device comprises a transmission region and a reflection region; blue light emitted into the transmission region penetrates through the light splitting device to form first blue light; the blue light emitted into the reflection region is reflected by the light splitting device to form second blue light; the light-emitting device comprises a reflection device; the first blue light is reflected back to the light splitting device; one part of the first blue light is reflected by the reflection region to form first emergent light; the light-emitting device comprises a wavelength conversion device; the wavelength conversion device is used for absorbing the second blue light and is stimulated to emit stimulated light; the stimulated light transmits the light splitting device to form second emergent light; the reflection device is a scattering reflection device; a light path from the light splitting device to the reflection device, and a light path from the light splitting device to the wavelength conversion device are the same. The light returned reversely along the two light paths is light close to lambert divergent light and the two light paths are the same, so that light spots and light distribution of the first emergent light and the second emergent light are the same, and formed mixed light is very uniform.

Description

technical field [0001] The invention relates to the field of light sources, in particular to a light emitting device and an illuminating device. Background technique [0002] At present, light source technology has been applied in many fields, and the most widely used light sources are halogen lamps and fluorescent lamps. The biggest problem with these light sources is insufficient brightness. In recent years, the LED light source has developed rapidly. The blue LED is used to excite the yellow phosphor powder coated on the surface of the LED to generate white light. This light source has begun to be popular in the market. But the problem is that the power of a single LED light source is low, and there is still the problem of insufficient brightness. [0003] In the field of high-brightness light sources, high-pressure mercury lamps and xenon light sources are commonly used. Such light sources rely on ultra-short lamp arcs to have high brightness (energy density), but th...

AI Technical Summary

Problems solved by technology

If there is no such spectroscopic filter, all the received light will exit in the direction of the excitation light source, resulting in serious light loss

[0005] However, this structure can only emit the received light, and the received light is often monochromatic light rather than white light

Therefore, the current semiconductor light source structure cannot achieve high-brightness white light.

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