Lifetime OLED display

摘要

Light emitting devices including sub-pixels having different numbers of emissive layers are provided. At least one sub-pixel of a first color may include a single emissive layer, and at least one sub-pixel of a second color may include multiple emissive layers disposed in a vertical stack. Light emitting devices in which different voltages are applied to each sub-pixel or group of sub-pixels are also provided. In some configurations, the voltage to be applied to a sub-pixel may be selected based upon the number of emissive layers in the sub-pixel.

主权项

1. A device comprising:
a first plurality of sub-pixel stripes, each stripe comprising a first emissive layer having a first peak emission wavelength; and a second plurality of sub-pixel stripes, each stripe comprising:
a second emissive layer having a second peak emission wavelength in a first range and different from the first peak emission wavelength; anda third emissive layer having a third peak emission wavelength in the same first range as the second peak emission wavelength and different from the first peak emission wavelength, the third emissive layer being disposed over the second emissive layer; wherein the number of emissive layers in the first sub-pixel stripe is different than the number of emissive layers in the second sub-pixel stripe; and wherein the first range is selected from the group consisting of: 580-700 nm, 500-580 nm, and 400-500 nm.