| 摘要 |
<p>A cross-section cut in the vertical direction V of a substrate (41) has a wavy shape. The substrate (41) has fourteen columns (L1 to L14) extending in the vertical direction V. Front surface grooves are formed in the odd columns of the substrate front surface (41a), and front surface ridges are formed on the even columns. Back surface ridges are formed on the odd columns of the substrate back surface (41b), and back surface grooves are formed in the even columns. Front surface LED chips (51a) are attached to the bottoms of the front surface grooves, namely the odd columns, of the substrate front surface (41a), and back surface LED chips (51b) are attached to the bottoms of the back surface grooves, namely the even columns of the substrate back surface (41b). Therefore, a flat light-emitting device having a light directivity and so forth are provided.</p> |
