Wavelength conversion device and associated illumination device

Abstract

The present invention provides a wavelength conversion device with a novel structure and an associated illumination device. The wavelength conversion device includes: a heat conductive substrate, a reflective film layer disposed on the heat conductive substrate, a light emitting layer disposed on the reflective film layer, and a bond located between the reflective film layer and the light emittinglayer. The bonding layer is composed of a binder doped with a first wavelength converting material, wherein the first wavelength converting material is capable of emitting red light having a wavelength in the range of 550-650 nm. The light emitting layer includes a yellow light emitting material having an emission wavelength shorter than an emission wavelength of the adhesive layer. The light-emitting effect of the monochromatic red light is further enhanced by the wavelength conversion device, and the reliability of the wavelength conversion device is also improved.

Description

technical field [0001] The invention relates to the field of laser display technology and lighting, in particular to a wavelength conversion device in a high-power laser application environment and a light emitting device containing the wavelength conversion device. Background technique [0002] It is well known that the blue excitation light emitted by solid-state light sources such as light-emitting diodes or laser diodes can excite different phosphors whose emission wavelength exceeds the peak wavelength of blue light to generate high-brightness light with corresponding wavelengths. However, due to the large Stokes shift of red light, the energy conversion efficiency is low, and most of the energy is converted into heat during the wavelength conversion process, so the application of red phosphors in high-power environments is hindered, and it has become a bottlenecks in the industry. [0003] Especially in the projection display field of laser phosphor technology, the pr...

AI Technical Summary

Problems solved by technology

Although this method can meet the application requirements to a certain extent, most of the light in other wavelength bands is filtered out by the color correction film, leaving only the part of the red light segment, and the finally filtered part of the energy is still converted into heat, thus It will also affect the reliability and service life of the product

That is to say, the existing technical level in the field of laser display technology still cannot meet the current people's requirements for brightness, color and product performance, so there is still room for improvement in the light efficiency of red light.

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