Light emitting device, projection device and illuminating device

Abstract

The invention discloses a light emitting device, a projecting device and an illuminating device. The light emitting device comprises a stimulating light source for generating stimulating light, a wavelength conversion material layer comprising a first surface and a second surface which are opposite to each other and a light splitting spectral filter, wherein the wavelength conversion material layer is used for absorbing part of the stimulating light transmitted to the first surface and emitting stimulated light of which the wavelength is different from that of the stimulating light, and comprises a wavelength conversion material and a scattering material; and the light splitting spectral filter is arranged on the first surface of the wavelength conversion material layer and used for transmitting the stimulating light and reflecting stimulated light. By the light emitting device, the scattering material is added into the wavelength conversion material layer, so that the light color can be guaranteed, and the light emitting device can uniformly emit light.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a light emitting device, a projection device and an illuminating device. Background technique [0002] At present, solid-state light sources have been widely used in general lighting, special lighting and projection display due to their long life and environmental protection. Among them, the white light solid-state light source has great development potential in the field of lighting. [0003] US Patent No. 7,547,114 proposes a light source structure, that is, a blue fluorescent semiconductor light source is used to excite a fluorescent pink wheel, and a polychromatic light sequence is generated as the color wheel rotates. When there is only one kind of fluorescent powder on the fluorescent pink wheel, such as yellow fluorescent powder, the light source can emit the mixed light of yellow light generated by excitation and blue light of remaining excitation light that is not exci...

AI Technical Summary

Problems solved by technology

However, increasing the use of phosphors will inevitably lead to stronger yellow light and weaker remaining blue light, which directly leads to a lower color temperature of the white light produced.

[0007] To sum up, in the current technical scheme, the color uniformity of the emitted light of the light-emitting device and the luminous color cannot be taken into account at the same time, which often constitutes a contradiction

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