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US 11,536,888 B2Granted
Light diffusing device with color conversion and related light system
AssigneeCorning Incorporated
InventorsStephan Lvovich Logunov, Manuela Ocampo, Peter Gerard Wigley
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Abstract
Embodiments of a light diffusing device with a color conversion layer are disclosed. Specifically the color conversion layer includes a luminophore that converts light from a higher wavelength to a lower wavelength.
Claims19
A light diffusing optical fiber configured to be optically coupled to a light source and to generate an output light in response to input light received from the light source, the light diffusing optical fiber comprising:
- a silica-based glass core;
- a scattering layer surrounding the core;
- and
- a light converting layer surrounding the scattering layer, the light converting layer comprising a polymer matrix and a luminophore within the polymer matrix;
- wherein the luminophore is configured to emit light in response to absorption of an input light, the emitted light having a peak wavelength between 580 nm and 680 nm;
- wherein a color of the output light as measured by the CIE 1931 x, y chromaticity space, comprises x from 0.55 to 0.75, y from 0.15 to 0.4, wherein the scattering layer comprises a polymer matrix and scattering particles embedded within the polymer matrix of the scattering layer, wherein the polymer matrix of the scattering layer is formed from a polymer material different from a polymer material of the polymer matrix of the light converting layer.
3 more elements
A light diffusing device comprising:
- a core formed from a silica-based glass;
- a scattering layer surrounding the core;
- and
- a light converting layer surrounding the scattering layer, the light converting layer comprising a polymer matrix and a luminophore;
- wherein the luminophore is configured to emit light in response to absorption of an input light;
- wherein a radial thickness of the light converting layer is 150 μm to 450 μm;
- and
- wherein the light converting layer comprises between 2.5% and 15% luminophore;
- and wherein the scattering layer comprises a polymer matrix and scattering particles embedded within the polymer matrix of the scattering layer, wherein the polymer matrix of the scattering layer is formed from a polymer material different from a polymer material of the polymer matrix of the light converting layer.
6 more elements
A lighting system comprising:
- a light source generating input light having a peak wavelength less than 500 nm;
- and
- a light diffusing optical fiber generating output light in response to the input light, the light diffusing optical fiber comprising:
- a core formed from a silica-based glass;
- a scattering layer surrounding the core;
- and
- a light converting layer surrounding the scattering layer, the light converting layer comprising a polymer matrix and a luminophore;
- wherein the light diffusing optical fiber is optically coupled to the light source such that input light generated by the light source is carried to the light converting layer;
- wherein the luminophore is configured to emit light in response to absorption of the input light, the emitted light having a peak wavelength greater than the peak wavelength of the input light;
- wherein a color of the output light as measured by the CIE 1931 x, y chromaticity space, comprises x from 0.55 to 0.75, y from 0.15 to 0.4;
- and wherein the scattering layer comprises a polymer matrix and scattering particles embedded within the polymer matrix of the scattering layer, wherein the polymer matrix of the scattering layer is formed from a polymer material different from a polymer material of the polymer matrix of the light converting layer.
8 more elements
Dependencies are inferred from the claim text.