Planar white illumination apparatus
First Claim
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1. An illumination structure comprising:
- a waveguide having an output surface for the emission of light therethrough;
a discrete light source for emitting output light embedded in the waveguide; and
a phosphor material for converting some of the output light to a different wavelength, the converted light mixing with unconverted output light to form mixed light spectrally different from both the output light and the converted light,wherein the discrete light source and the phosphor material are arranged in a geometry that prevents light reflecting from the phosphor material from propagating directly back to the discrete light source and being absorbed thereby.
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Abstract
In one aspect, an illumination structure includes a substantially non-fiber waveguide, which itself includes a discrete in-coupling region for receiving light, a discrete propagation region for propagating light, and a discrete out-coupling region for emitting light.
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Citations
24 Claims
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1. An illumination structure comprising:
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a waveguide having an output surface for the emission of light therethrough; a discrete light source for emitting output light embedded in the waveguide; and a phosphor material for converting some of the output light to a different wavelength, the converted light mixing with unconverted output light to form mixed light spectrally different from both the output light and the converted light, wherein the discrete light source and the phosphor material are arranged in a geometry that prevents light reflecting from the phosphor material from propagating directly back to the discrete light source and being absorbed thereby. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification