Patent ID: 8921870

Claim:
A light emitting device comprising: a base substrate having a major surface; a first substrate provided on the major surface and including a first reflection region parallel to the major surface and having a light reflectance higher than a light reflectance of the major surface; a second substrate juxtaposed with the first substrate on the major surface and including a second reflection region parallel to the major surface and having a light reflectance higher than the light reflectance of the major surface; a first semiconductor light emitting element provided on the first reflection region, the first semiconductor light emitting element including a first stacked structural body including a first light emitting layer; and a second semiconductor light emitting element provided on the second reflection region, the second semiconductor light emitting element including a second stacked structural body including a second light emitting layer, an area of a face on a side of the first semiconductor light emitting element opposite to the first substrate being S 1 (square millimeters), and a gap between the first light emitting layer and the first substrate being t 1 (millimeters), an area of a face on a side of the second semiconductor light emitting element opposite to the second substrate being S 2 (square millimeters), and a gap between the second light emitting layer and the second substrate being t 2 (millimeters), an area R 1 of the first reflection region (square millimeters) satisfying a relationship (S 1 +100t 1 2 )≦R 1 ≦(S 1 +10000t 1 2 ), an area R 2 of the second reflection region (square millimeters) satisfying a relationship (S 2 +100t 2 2 )≦R 2 ≦(S 2 +10000t 2 2 ), and a gap L (millimeters) between the first semiconductor light emitting element and the second semiconductor light emitting element satisfying relationships 100t 1 ≦L≦10000t 1 and 100t 2 ≦L≦10000t 2 , the first reflection region including a first protruding region surrounding in a whole circumference of the first semiconductor light emitting element when projected in a plane perpendicular to a direction from the base substrate to the first substrate, the first protruding region having a first width between a rim of the first semiconductor light emitting element and a rim of the first reflection region not less than four times the t 1 in the whole circumference, and the second reflection region including a second protruding region surrounding in a whole circumference of the second semiconductor light emitting element when projected in a plane perpendicular to a direction from the base substrate to the second substrate, the second protruding region having a second width between a rim of the second semiconductor light emitting element and a rim of the second reflection region not less than four times the t 2 in the whole circumference.