TEXTURED PHOSPHOR CONVERSION LAYER LIGHT EMITTING DIODE
First Claim
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1. A Light Emitting Diode (LED), comprising:
- an LED chip, emitting light at a first wavelength region;
an encapsulation layer, coupled to the LED chip, wherein the encapsulation layer is transparent at the first wavelength region; and
a phosphor layer, coupled to the encapsulation layer and distant from the LED chip, the phosphor layer converting the light emitted by the LED chip in the first wavelength region to light in at least a second wavelength region, wherein at least a portion of a surface of the phosphor layer is textured.
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Abstract
This invention is related to LED Light Extraction for optoelectronic applications. More particularly the invention relates to (Al, Ga, In)N combined with optimized optics and phosphor layer for highly efficient (Al, Ga, In)N based light emitting diodes applications, and its fabrication method. A further extension is the general combination of a shaped high refractive index light extraction material combined with a shaped optical element.
193 Citations
20 Claims
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1. A Light Emitting Diode (LED), comprising:
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an LED chip, emitting light at a first wavelength region; an encapsulation layer, coupled to the LED chip, wherein the encapsulation layer is transparent at the first wavelength region; and a phosphor layer, coupled to the encapsulation layer and distant from the LED chip, the phosphor layer converting the light emitted by the LED chip in the first wavelength region to light in at least a second wavelength region, wherein at least a portion of a surface of the phosphor layer is textured. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A Light Emitting Diode (LED), comprising:
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an LED chip, emitting light at a first wavelength region and having a first refractive index; an encapsulation layer, coupled to the LED chip, wherein the encapsulation layer is transparent at the first wavelength region and having a second refractive index less than the first refractive index, wherein the second refractive index is greater than 1; and a phosphor layer, coupled to the encapsulation layer and distant from the LED chip, the phosphor layer converting light emitted in the first wavelength region to light in at least a second wavelength region, wherein at least a portion of a surface of the phosphor layer farthest from the LED chip is not normal to the light emitted from the LED chip. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification