Lifetime OLED display
First Claim
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1. A device comprising:
- a light-emitting region comprising a pixel, said pixel comprising;
a first sub-pixel comprising a first emissive layer having a first peak emission wavelength; and
a second sub-pixel comprising;
a second emissive layer having a second peak emission wavelength in a first range and different from the first peak emission wavelength; and
a 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 is different than the number of emissive layers in the second sub-pixel; and
wherein the first range is selected from the group consisting of;
580-700 nm;
500-580 nm- and 400-500 nm.
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Abstract
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.
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Citations
20 Claims
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1. A device comprising:
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a light-emitting region comprising a pixel, said pixel comprising; a first sub-pixel comprising a first emissive layer having a first peak emission wavelength; and a second sub-pixel comprising; a second emissive layer having a second peak emission wavelength in a first range and different from the first peak emission wavelength; and a 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 is different than the number of emissive layers in the second sub-pixel; and wherein the first range is selected from the group consisting of;
580-700 nm;
500-580 nm- and 400-500 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of fabricating a region of a light-emitting device, the method comprising:
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depositing a first emissive material over a first region of a substrate, the first emissive material having a first peak emission wavelength; depositing a second emissive material over a second region of the substrate different from the first region of the substrate, the second emissive material having a second peak emission wavelength in a first range and different from the first peak emission wavelength; and depositing a third emissive material over the second emissive material, the third emissive material 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; wherein the first range is selected from the group consisting of;
580-700 nm;
500-580 nm- and 400-500 nm.
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Specification