Multi-cavities light emitting device

Abstract

A Multi-Cavities light emitting device includes a base, a blue light emitting unit, at least two red light emitting units, a light conversion layer and a lens, and the base has a central slot and at least two side slots symmetrically formed on external sides of the central slot, and the blue light emitting unit is installed in the central slot, and the two red light emitting units are installed in the two side slots respectively, and the light conversion layer is covered onto the blue light emitting unit, and the lens is protruded from the base and sealed onto the central slot and at least two side slots, so as to achieve the effects of improving the light extraction efficiency of an LED chip and the yield rate of the product and reducing the overall assembling time and cost.

What is claimed is: 
     
         1 . A Multi-Cavities light emitting device, comprising:
 a base, having a central slot and at least two side slots symmetrically formed on external sides of the central slot;   a blue light emitting unit, installed in the central slot;   at least two red light emitting units, installed in the at least two side slots respectively;   a light conversion layer, covered onto the blue light emitting unit; and   a lens, protruded from the base and sealed onto the central slot and the at least two side slots.   
     
     
         2 . The Multi-Cavities light emitting device of  claim 1 , wherein the base is a ceramic base, and the base includes a plurality of conductive holes and an inner-layer circuit, and the blue light emitting unit and the red light emitting units are electrically coupled through the conductive holes and the inner-layer circuit. 
     
     
         3 . The Multi-Cavities light emitting device of  claim 1 , wherein the base includes four side slots formed around external sides of the central slot, and the central slot and the side slots are substantially in a long elliptical shape, and a gap between the central slot and each of the side slots is greater than 0.5 mm. 
     
     
         4 . The Multi-Cavities light emitting device of  claim 1 , wherein the central slot and the side slots are formed in an area greater than 50% of the area of the base. 
     
     
         5 . The Multi-Cavities light emitting device of  claim 1 , wherein the blue light emitting unit is a blue LED chip array, and each of the red light emitting units is a red LED chip array, and lights emitted from the blue light emitting unit and the red light emitting units and collected have a color temperature range from 2700K to 4000K. 
     
     
         6 . The Multi-Cavities light emitting device of  claim 1 , wherein the light conversion layer contains a yellow or green phosphor and the yellow phosphor is yttrium aluminum garnet (YAG). 
     
     
         7 . A Multi-Cavities light emitting device, comprising:
 a base, having a central slot and at least two side slots symmetrically formed on external sides of the central slot;   a red light emitting unit, installed in the central slot;   at least two blue light emitting units, installed in the at least two side slots respectively;   at least two light conversion layers, covered onto the corresponding blue light emitting units respectively; and   a lens, protruded from the base, and sealed onto the central slot and the at least two side slots.   
     
     
         8 . The Multi-Cavities light emitting device of  claim 7 , wherein the base is a ceramic base, and the base includes a plurality of conductive holes and an inner-layer circuit, and the blue light emitting unit and the red light emitting units are electrically coupled through the conductive holes and the inner-layer circuit. 
     
     
         9 . The Multi-Cavities light emitting device of  claim 7 , wherein the base includes four side slots formed around external sides of the central slot, and the central slot and the side slots are substantially in a long elliptical shape, and a gap between the central slot and each of the side slots is greater than 0.5 mm. 
     
     
         10 . The Multi-Cavities light emitting device of  claim 7 , wherein the central slot and the side slots are formed in an area greater than 50% of the area of the base. 
     
     
         11 . The Multi-Cavities light emitting device of  claim 7 , wherein the red light emitting unit is a red LED chip array, and each of the blue light emitting units is a blue LED chip array, and lights emitted from the red light emitting unit and the blue light emitting units and collected have a color temperature range from 2700K to 4000K. 
     
     
         12 . The Multi-Cavities light emitting device of  claim 7 , wherein the light conversion layers contain a yellow or green phosphor and the yellow phosphor is yttrium aluminum garnet (YAG). 
     
     
         13 . A Multi-Cavities light emitting device, comprising:
 a base, having a central slot and at least two side slots symmetrically formed on external sides of the central slot, and the central slot and the side slots being formed in an area greater than 50% of the area of the base;   a first light emitting unit, installed in the central slot; and   at least two second light emitting units, installed in the at least two side slots respectively.   
     
     
         14 . The Multi-Cavities light emitting device of  claim 13 , further comprising a light conversion layer, and the first light emitting unit is a blue light emitting unit, and each of the second light emitting units is a red light emitting unit, and the light conversion layer is covered onto the first light emitting unit. 
     
     
         15 . The Multi-Cavities light emitting device of  claim 13 , further comprising at least two light conversion layers, and the first light emitting unit is a red light emitting unit, and each of the second light emitting units is a blue light emitting unit, and the light conversion layers are covered onto the second light emitting units. 
     
     
         16 . The Multi-Cavities light emitting device of  claim 13 , wherein the base is a ceramic base, and the base includes a plurality of conductive holes and an inner-layer circuit, and the blue light emitting unit and the red light emitting units are electrically coupled through the conductive holes and the inner-layer circuit. 
     
     
         17 . The Multi-Cavities light emitting device of  claim 13 , wherein the base includes four side slots formed around external sides of the central slot, and the central slot and the side slots are substantially in a long elliptical shape, and a gap between the central slot and each of the side slots is greater than 0.5 mm. 
     
     
         18 . The Multi-Cavities light emitting device of  claim 14 , wherein the blue light emitting unit is a blue LED chip array, and the red light emitting unit is a red LED chip array, and lights emitted from the first light emitting unit and the second light emitting units and collected have a color temperature range from 2700K to 4000K. 
     
     
         19 . The Multi-Cavities light emitting device of  claim 15 , wherein the blue light emitting unit is a blue LED chip array, and the red light emitting unit is a red LED chip array, and lights emitted from the first light emitting unit and the second light emitting units and collected have a color temperature range from 2700K to 4000K. 
     
     
         20 . The Multi-Cavities light emitting device of  claim 14 , wherein the light conversion layer contains a yellow or green phosphor and the yellow phosphor is yttrium aluminum garnet (YAG). 
     
     
         21 . The Multi-Cavities light emitting device of  claim 15 , wherein the light conversion layer contains a yellow or green phosphor and the yellow phosphor is yttrium aluminum garnet (YAG).