H ELECTRICITY
H10 SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
H10K ORGANIC ELECTRIC SOLID-STATE DEVICES
H10K50/00 Organic light-emitting devices
H10K50/80 Constructional details
H10K50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
H10K50/865 comprising light absorbing layers, e.g. light-blocking layers