A compound of formula where one of A1, A2 or A3 is N, and the others are independently selected from CH or N; ring B is a fused 5 or 6-membered carbocyclic or heterocyclic ring which is optionally substituted as defined in the specification, and R1, R2, R3, R4, and n are as defined in the specification. The size of a region occupied by each of the signal processing sections on the signal processing layers is larger than the arrangement intervals between the signal input sections on the signal input layers. Image quality can be improved according to a mixing rate of the green phosphor and conventionally used green phosphors since color reproduction range widens and luminance does not decrease compared to using the conventional green phosphors.