Patent ID: 8004174

Claim:
A light-emitting device comprising: four or more rows of element groups each having light-emitting elements arranged in a first direction, the element groups being arranged in parallel in a second direction different from the first direction, wherein in each of a plurality of unit regions arranged in the first direction, the light-emitting elements belonging to the four or more rows of element groups are individually arranged at different positions in the first direction, the four or more rows of element groups include a first element group, a second element group, and a third element group adjacent to the second element group, each element group includes only one light-emitting element within each of the plurality of unit regions, in each of the plurality of unit regions, the light-emitting element belonging to the second element group is disposed on one side in the first direction when viewed from the light-emitting element belonging to the first element group, and the light-emitting element belonging to the third element group is disposed on the other side in the first direction when viewed from the light-emitting element belonging to the first element group, the one side is a position in the first direction that is before or after the light-emitting element belonging to the first element group, and the other side is a position in the first direction that is opposite to the one side relative to the light-emitting element belonging to the first element group, and with respect to the second direction, the second light-emitting element is disposed between the first light-emitting element and the third light-emitting element.