Samsung patents display panel that combines screen and light sensor

1. A sensor-embedded display panel, comprising: a light emitting element on a substrate, the light emitting element including a light emitting layer, and a photosensor on the substrate, the photosensor including a photosensitive layer, the photosensitive layer extending at least partially in parallel with the light emitting layer along an in-plane direction of the substrate, wherein the light emitting element and the photosensor each include a separate portion of a first common auxiliary layer extending continuously as a single first piece of material under each of the light emitting layer and the photosensitive layer; and a separate portion of a second common auxiliary layer extending continuously as a single second piece of material on each of the light emitting layer and the photosensitive layer, wherein the photosensitive layer includes a light absorbing semiconductor having a HOMO energy level having a difference of less than about 1.0 eV from a HOMO energy level of the first common auxiliary layer and a LUMO energy level having a difference of less than about 1.0 eV from a LUMO energy level of the second common auxiliary layer, wherein the photosensitive layer does not include any counterpart semiconductor for any pn junction with the light absorbing semiconductor, wherein the light absorbing semiconductor is an organic light absorbing material, and wherein the organic light absorbing material is represented by at least one of Chemical Formula 1: wherein, in Chemical Formula 1, X is O, S, Se, Te, SO, SO 2, CR b R c, or SiR d R e, Ar is a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heterocyclic group, or fused rings thereof, Ar 1a and Ar 2a are each independently a substituted or unsubstituted C6 to C30 aryl(ene) group or a substituted or unsubstituted C3 to C30 heteroaryl(ene) group, R 1a to R 3a and R b to R e are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a halogen, a cyano group, or any combination thereof, and Ar 1a, Ar 2a, R 1a, and R 2a are each independently present, or two adjacent ones of Ar 1a, Ar 2a, R 1a, and R 2a are linked to each other to form a ring, and wherein the light emitting layer includes an organic light emitting material, and difference between respective sublimation temperatures of the organic light absorbing material and the organic light emitting material is greater than or equal to about 0° C. and less than about 100° C.