LIGHT-EMITTING DEVICE AND METHOD FOR MANUFACTURING THE SAME

To provide: a light-emitting device easy to escape heat from a fluorescent material and small in the unevenness in luminescent chromaticity distribution; and a method for manufacturing such a light-emitting device with good productivity.SOLUTION: A light-emitting device (100) according to an embodim...

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1. Verfasser: HAYASHI HIROSUKE
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide: a light-emitting device easy to escape heat from a fluorescent material and small in the unevenness in luminescent chromaticity distribution; and a method for manufacturing such a light-emitting device with good productivity.SOLUTION: A light-emitting device (100) according to an embodiment comprises: a light-emitting element (10); a translucent member (20) disposed over the light-emitting element (10), and including a first region (20a) located right above an upper face of the light-emitting element (10) and a second region (20b) located laterally outside the first region (20a); a light-guide member (30) covering a side face of the light-emitting element (10) and a lower face of the second region (20b) of the translucent member; and an optically reflective member (40) covering an outside face of the light-guide member (30). The translucent member (20) contains a fluorescent material (25) and a light scattering material (28), which is not a fluorescent material. The concentration of the fluorescent material (25) is higher in the first region (20a) than that in the second region (20b); and the concentration of the light scattering material (28) is higher in the second region (20b) than that in the first region (20a).SELECTED DRAWING: Figure 1B 【課題】蛍光物質から熱を引きやすく且つ発光色度分布にむらの少ない発光装置を提供する。また、そのような発光装置の生産性良好な製造方法を提供する。【解決手段】一実施の形態に係る発光装置(100)は、発光素子(10)と、発光素子(10)の上方に配置され、発光素子(10)の上面の直上に位置する第1領域(20a)と第1領域(20a)より側方に位置する第2領域(20b)と、からなる透光性部材(20)と、発光素子(10)の側面と透光性部材の第2領域(20b)の下面とを被覆する導光部材(30)と、導光部材(30)の外面を被覆する光反射性部材(40)とを備え、透光性部材(20)は、蛍光物質(25)と、蛍光物質ではない光散乱材(28)とを含有しており、蛍光物質(25)の濃度は、第2領域(20b)より第1領域(20a)において高く、光散乱材(28)の濃度は、第1領域(20a)より第2領域(20b)において高い。【選択図】図1B