公开(公告)号：EP3401719A1

公开(公告)日：2018-11-14

申请号：EP17176547.2

申请日：2017-06-19

申请人： J-TEK. CO

发明人： Chung, Hai Woon ,  Yang, Keun Young

IPC分类号： G02B19/00 ,  H01L33/58 ,  H01L33/60 ,  F21V5/00 ,  F21V5/04 ,  F21V7/00 ,  G02F1/13357 ,  H01L33/48

CPC分类号： G02B19/0028 ,  G02B19/0061 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/133606 ,  G02F2001/133607 ,  H01L33/48 ,  H01L33/58 ,  H01L33/60 ,  H01L2933/0058 ,  H01L2933/0083 ,  H01L2933/0091

摘要： A diffusing lens (40) and a light emitting device using the same are provided. The diffusing lens (40) includes an input portion (11; 11') concavely formed on a bottom surface of a lens body (10; 10') and having a first convex portion (12) at a center of the input portion (11; 11'); an output portion (17) having a first output surface (13) concavely formed around a center of a top surface of the lens body (10; 10') and a second output surface (15; 15') convexly formed around the first output surface (13), wherein a second convex portion (14) is formed at a center of the first output surface (13); and a reflection portion (19; 19') formed on the bottom surface of the lens body (10; 10') and located around the input portion (11; 11') to reflect an incident light in the lens body (10; 10'). The first output surface (13) extends from a light axis of the diffusing lens (40) until a predetermined distance from the light axis and is formed into an elliptical shape with two focuses, and the second output surface (15; 15') extends from the predetermined distance to surround the first output surface (13) and is formed into a circular shape with a predetermined radius.