Light emitting apparatus and light emitting unit

Abstract

A fluorescent lamp type light emitting apparatus is provided. The light emitting apparatus comprises a cover, a light emitting module, radiation pads, and cap parts. The cover comprises a first cover and a transmissive second cover coupled to the first cover. The light emitting module comprises a plurality of light emitting diodes in the cover. The radiation pads are disposed on the light emitting module. The cap parts comprise electrode terminals at both ends of the cover.

What is claimed is: 
     
         1 . A light emitting unit, comprising:
 a cover comprising an outer surface, an inner surface, and two support protrusions protruded from the inner surface along a length of the inner surface, wherein the outer surface has a circular cross section;   a light emitting module disposed within the cover, wherein the two support protrusions of the cover inhibit movement of the light emitting module within the cover; and   at least one radiation member extending from the light emitting module;   wherein the light emitting module comprises;   a circuit board; and   a first light emitting diode group, the first light emitting diode group including a plurality of first emitting diodes arranged in a linear formation.   
     
     
         2 . The light emitting unit according to  claim 1 , wherein the cover is at least partially transmissive. 
     
     
         3 . The light emitting unit according to  claim 1 , wherein a first support protrusion of the two support protrusions extends from the inner surface of the cover in a first direction towards a second support protrusion of the two support protrusions; and
 wherein the second support protrusion extends from the inner surface of the cover in a second direction, opposite to the first direction, towards the first support protrusion.   
     
     
         4 . The light emitting unit according to  claim 3 , wherein the at least one radiation member extends from the inner surface in a third direction perpendicular to the first and second directions. 
     
     
         5 . The light emitting unit according to  claim 1 , further comprising a first cap part disposed over and closing off one end of the cover. 
     
     
         6 . The light emitting unit according to  claim 1 , wherein the light emitting module further comprises a second light emitting diode group, the second emitting diode group including a plurality of second light emitting diodes arranged in a line formation, wherein the second light emitting diodes are in line with the first light emitting diodes of the first light emitting diode group. 
     
     
         7 . The light emitting unit according to  claim 6 , wherein the first and second light emitting diodes are arranged in a linear formation extending in a fourth direction perpendicular to the circular cross section of the outer surface of the cover. 
     
     
         8 . The light emitting unit according to  claim 1 , wherein the two support protrusions are monolithically-formed with the inner surface of the cover. 
     
     
         9 . The light emitting unit according to  claim 1 , wherein each of the two support protrusions extends along an entire length of the inner surface of the cover. 
     
     
         10 . The light emitting unit according to  claim 1 , wherein the circuit board of the light emitting unit is in thermal contact with the at least one radiation member. 
     
     
         11 . A light emitting unit comprising:
 at least one cover;   a light emitting module in the at least one cover; and   a radiation pad disposed on the light emitting module,   wherein the at least one cover comprising a support extended from an inner surface of the at least one cover,   wherein the light emitting module comprises a circuit board and a plurality of the light emitting diodes on the circuit board,   wherein one end of the radiation pad is in contact with a first inner circumference of the at least one cover,   wherein the radiation pad comprises at least two radiation members and the at least two radiation members of the radiation pad are spaced apart a predetermined distance from each other.   
     
     
         12 . The light emitting unit according to  claim 11 , wherein the at least one cover is transmissive. 
     
     
         13 . The light emitting unit according to  claim 11 , wherein the at least one cover comprises at least one protrusion extended from the inner surface of the at least one cover. 
     
     
         14 . The light emitting unit according to  claim 13 , wherein the at least one protrusion is disposed between at least the two radiation members. 
     
     
         15 . The light emitting unit according to  claim 11 , wherein the light emitting module comprising a first light emitting diode array including a plurality of light emitting diodes, and a second emitting diode array including a plurality of light emitting diodes. 
     
     
         16 . The light emitting unit according to  claim 15 , wherein the first light emitting diode array is connected to the second light emitting diode array arranged in a linear formation. 
     
     
         17 . The light emitting unit according to  claim 11 , wherein the at least one cover comprises a first cover and a second cover on the first cover, wherein the first cover is directly in contact with the second cover and a material of the first cover is different from that of the second cover. 
     
     
         18 . A light emitting unit comprising:
 a cover comprising a first cover and a second cover coupled to the first cover;   a light emitting module comprising a circuit board and a plurality of light emitting diodes in the cover;   a plurality of radiation pads disposed on an upper surface of the circuit board   a plurality of cap parts comprising a plurality of electrode terminals coupled at both ends of the cover;   wherein the cover is formed in tube shape and the second cover is transmissive,   wherein the light emitting diodes is arrayed in at least one line under the circuit board,   wherein the first cover comprises a protrusion protruding inward from at least one of inner and outer circumference thereof,   wherein the radiation pads have upper portions that are directly in contact with a first inner circumference of the first cover,   wherein the upper portions of the radiation pads have at least one parallel portion, and   wherein the first cover comprises at least two supports and each of the at least two supports protrude inward from a portion at lateral edges of the first cover for supporting the light emitting module.   
     
     
         19 . The light emitting unit according to  claim 18 , wherein the protrusion is disposed in a longitudinal direction of the first cover. 
     
     
         20 . The light emitting unit according to  claim 18 , wherein the radiation pads have a width less than that of the circuit board. 
     
     
         21 . The light emitting unit according to  claim 18 , wherein the radiation pads are spaced apart a predetermined distance from each other. 
     
     
         22 . The light emitting unit according to  claim 18 , wherein the light emitting module comprises a first light emitting diode array including a plurality of light emitting diodes, and a second emitting diode array including a plurality of light emitting diodes. 
     
     
         23 . The light emitting unit according to  claim 22 , wherein the first light emitting diode array is connected to the second light emitting diode array in arranged in a linear formation. 
     
     
         24 . The light emitting unit according to  claim 18 , wherein the protrusion is disposed between the radiation pads.