Light emissive ceramic laminate and method of making same
AssigneeNitto Denko Corporation
InventorsHironaka Fujii, Toshitaka Nakamura
Life of this patent
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Abstract
A light emitting device includes: at least one light emitting component (LEC) comprising a light-emitting face having a longest linear dimension D1; at least one wavelength-converting consolidated monolithic component (WCC) having a light-receiving face, a light-emitting face, and a peripheral edge. The WCC is radiationally linked to and spaced apart from the LEC at a distance D2, D2 being less than D1, wherein a projection edge of the light-emitting face of the LEC and the peripheral edge of the WCC define a shortest distance D3 therebetween, wherein a surface area of the light-receiving face of the WCC is at least 120% of that of the light-emitting face of the LEC, and the LEC and WCC are positioned relative to each other to satisfy D3/D2≧1.
Claims16
A light emitting device comprising:
- at least one light emitting component (LEC) for emitting light with a wavelength between about 360 nm to about 500 nm, said LEC comprising a light-emitting face having a longest linear dimension D1;
- at least one wavelength-converting consolidated monolithic component (WCC) for re-emitting the light at a different wavelength, said WCC having a light-receiving face, a light-emitting face, and a peripheral edge, said WCC being radiationally linked to and spaced apart from the LEC at a distance D2, D2 being less than D1,
- wherein a projection edge of the light-emitting face of the LEC and the peripheral edge of the WCC define a minimized distance D3 therebetween,
- wherein a surface area of the light-receiving face of the WCC is at least 120% of a surface area of the light-emitting face of the LEC, and
- wherein the LEC and WCC are positioned relative to each other to satisfy D3/D2≧1.
A method for making a light emitting device comprising:
- providing at least one light-emitting component (LEC) for emitting light with a wavelength between about 360 nm and about 500 nm, said LEC comprising a light-emitting face having a longest linear dimension D1;
- providing at least one wavelength-converting consolidated monolithic component (WCC) for re-emitting the light at a different wavelength, said WCC having a light-receiving face, a light-emitting face, and a peripheral edge, said light-receiving face of the WCC having a surface area which is at least 120% of a surface area of the light-emitting surface area of the LEC,
- wherein a projection edge of the light-emitting face of the LEC and the peripheral edge of the WCC define a minimized distance D3 therebetween,
- positioning the LEC and WCC relative to each other to radiationally link the WCC to the LEC and space the WCC apart from the LEC at a distance D2, D2 being less than D1, and
- positioning the LEC and WCC relative to each other to satisfy D3/D2≧1.
Dependencies are inferred from the claim text.