Patent ID: 9559151
Date: 2017-01-31
CPC Classifications: F21K,F21Y,H01L

Claim:
1. A device, comprising: a first organic light emitting device that emits light having a peak wavelength in the visible spectrum of 600-700 nm, further comprising a first emissive layer having a first emissive material; a second organic light emitting device that emits light having a peak wavelength in the visible spectrum of 500-600 nm, further comprising a second emissive layer having a second emissive material; a third organic light emitting device that emits light having a peak wavelength in the visible spectrum of 400-500 nm, further comprising a third emissive layer having a third emissive material; a fourth organic light emitting device that emits light having a peak wavelength in the visible spectrum of 400 to 500 nm, further comprising a fourth emissive layer having a fourth emissive material; the first organic light emitting device comprises an emissive layer having a phosphorescent emissive material, the second organic light emitting device comprises an emissive layer having a phosphorescent emissive material, the third organic light emitting device comprises an emissive layer having a fluorescent emissive material, and the peak wavelength in the visible spectrum of light emitted by the fourth organic light emitting device is at least 4 nm less than the peak wavelength in the visible spectrum of light emitted by the third organic light emitting device.