Patent ID: 8044568

Claim:
A light emitter substrate comprising: a substrate; plural light emitter layers arranged in a first direction and in a second direction perpendicular to the first direction respectively at gaps, on the substrate; a rib arranged between the light emitter layers adjacent in the second direction and extending the first direction; plural metal backs each covering at least one of the light emitter layers and arranged in the first direction and in the second direction respectively at gaps; a first resistor, extending in the first direction, positioned on the rib, adapted to electrically connect the metal backs adjacent in the first direction; and a second resistor, extending in the second direction, positioned between the ribs and the substrate, adapted to electrically connect the metal backs adjacent in the second direction, wherein volume resistance of the first resistor and volume resistance of the second resistor are lower than volume resistance of the rib, and when a gap between the metal backs in the second direction is Gx and a gap between the metal backs in the first direction is Gy, a relation Gx<Gy is satisfied.