Space-through charge transfer compound, and organic light emitting diode and organic light emitting display device including the same

A space-through charge transfer compound of Formula 1:

• wherein X is carbon or nitrogen,
• wherein A is selected from Formula 2, and D is selected from Formula 3:
• wherein each of X1, X2 and X3 is independently carbon or nitrogen, and at least one of X1, X2 and X3 is nitrogen,
• wherein each of R1 and R2 is independently selected from the group consisting of hydrogen, C1 to C10 alkyl group and C6 to C30 aryl group,
• wherein R3 is cyano group, and R4 is heteroaryl group, and
• wherein R5 is selected from the group consisting of hydrogen and heteroaryl group, and each of R6 and R7 is hydrogen or R6 and R7 are bonded together to form a fused ring.