Light-emitting device array with individual cells
View Patent ↗A light-emitting device and a method for manufacturing the light-emitting device is disclosed. Such a light-emitting device comprises a substrate, a plurality of cells disposed in the substrate, and a plurality of semiconductor dice, wherein each of the plurality of cells accommodates at least one of the plurality of dice. Each of the plurality of cells may be filled with an encapsulant, phosphor or a mixture of an encapsulant with phosphor to control light characteristics of the light-emitting device. In an alternative aspect, cells may be filled with an encapsulant, and comprise a transparent cover coated with or filled with phosphors to control light characteristics of the light-emitting device.
1. A light-emitting apparatus; comprising:
a substrate;
a plurality of cells disposed in the substrate;
a layer of material possessing diffusive reflectivity applied onto at least a surface of the plurality of cells;
a first mixture of encapsulate and a first phosphor having a first color, the first mixture disposed into at least a first cell of the plurality of cells;
a second mixture of encapsulate and a second phosphor having a second color, the second mixture disposed into at least a second cell of the plurality of cells;
a plurality of semiconductor dice;
wherein each of the plurality of cells accommodates at least one of the pluralities of semiconductor dice,
wherein the first phosphor is the only phosphor in the first mixture and the second phosphor is the only phosphor in the second mixture, and
wherein the first color is different from the second color.
2. The apparatus according to claim 1 , wherein an encapsulate is disposed into each of the plurality of cells not containing the first or second mixture.
3. The apparatus according to claim 1 further comprising
a plurality of transparent covers, each of the plurality of covers being disposed over one of the plurality of cells.
4. The apparatus according to claim 3 , wherein at least one of the plurality of the transparent covers is coated with or filled with phosphor.
5. The apparatus according to claim 3 , wherein at least two of the plurality of the transparent covers are coated with or filled with phosphor of different color.
6. A method for manufacturing a light-emitting device, comprising:
manufacturing a substrate;
disposing a plurality of cells in the substrate;
applying a layer of material possessing diffusive reflectivity onto at least a surface of the plurality of cells;
disposing a first mixture of encapsulant and a first phosphor having a first color into at least a first cell of the plurality of cells;
disposing a second mixture of encapsulate and a second phosphor having a second color into at least a second cell of the plurality of cells;
and
disposing a plurality of semiconductor dice into the plurality of cells;
wherein each of the plurality of cells accommodates at least one of the plurality of semiconductor dice,
wherein the first phosphor is the only phosphor in the first mixture and the second phosphor is the only phosphor in the second mixture, and
wherein the first color is different from the second color.
7. The method according to claim 6 , wherein an encapsulant is disposed into each of the plurality of cells not containing the first or second mixture.
8. The method according to claim 6 further comprising disposing a transparent cover over each of the plurality of cells.
9. The method according to claim 8 , wherein at least one of the plurality of the transparent covers is coated with or filled with phosphor.
10. The method according to claim 8 , wherein at least two of the plurality of the transparent covers are coated with or filled with phosphor of different color.