High resolution low power consumption OLED display with extended lifetime
Full-color pixel arrangements for use in devices such as OLED displays are provided, in which multiple sub-pixels are configured to emit different colors of light, with each sub-pixel having a different optical path length than some or all of the other sub-pixels within the pixel.
1. A device comprising a full-color pixel arrangement, the full-color pixel arrangement comprising:
a plurality of N sub-pixels, the N sub-pixels being addressable and controllable as a single pixel within the device;
wherein the full-color pixel arrangement includes not more than two colors of emissive regions; and
wherein the full-color pixel arrangement comprises one or more selected from the following:
N−1 color altering layers, each disposed in a stack with one or more of the N sub-pixels;
N−1 emissive layers, each disposed within one or more of the N sub-pixels;
N−1 optical path lengths, each of which is defined within one of the N sub-pixels.
2. The device of claim 1 , wherein each sub-pixel of the plurality of N sub-pixels comprises a blue emissive region or a green emissive region.
3. The device of claim 2 , wherein one of the N sub-pixels comprising the green emissive region is configured to emit green light.
4. The device of claim 2 , wherein one of the N sub-pixels comprising the green emissive region is configured to emit blue light.
5. The device of claim 2 , wherein one of the N sub-pixels comprising the blue emissive region is configured to emit green light.
6. The device of claim 2 , wherein one of the N sub-pixels comprising the blue emissive region is configured to emit blue light.
7. The device of claim 6 , wherein the one of the N sub-pixels configured to emit blue light has a different optical path length than the other N sub-pixels.
8. The device of claim 1 , wherein the N sub-pixels comprise a common emissive region that extends into each of the N sub-pixels.
9. The device of claim 8 , wherein the common emissive region is a light blue emissive region.
10. The device of claim 9 , wherein the common emissive region comprises a plurality of emissive materials.
11. The device of claim 10 , wherein the common emissive region comprises green and blue emissive materials.
12. The device of claim 9 , wherein the plurality of N sub-pixels comprises:
a green sub-pixel that includes a color filter and/or a down-conversion component;
a red sub-pixel that includes a color filter and/or a down-conversion component; and
a blue sub-pixel.
13. The device of claim 1 , wherein:
the N sub-pixels comprise first, second, and third sub-pixels;
the first sub-pixel comprises a blue emissive region; and
the second and/or third sub-pixels comprise a blue emissive region having a green emissive material and a deep blue emissive material.
14. The device of claim 1 , wherein the plurality of N sub-pixels comprises:
a blue sub-pixel comprising a blue emissive region;
a green sub-pixel; and
a red sub-pixel comprising a color filter and/or a down-conversion component;
wherein each of the blue, green, and red sub-pixels has a different optical path length than each of the others.
15. The device of claim 14 , wherein the green sub-pixel comprises a green emissive region.
16. The device of claim 14 , wherein the green sub-pixel comprises a color filter and/or a down-conversion component.
17. The device of claim 1 , wherein the device comprises a first blue emissive region and a second blue emissive region separate from the first blue emissive region.
18. The device of claim 17 , wherein the first blue emissive region has a peak wavelength that is at least 3 nm different than a peak wavelength of the second blue emissive region.
19. The device of claim 18 , wherein the plurality of N sub-pixels comprises:
a green sub-pixel comprising a color filter and/or a down-conversion component; and
a red sub-pixel comprising a color filter and/or a down-conversion component; and
a blue sub-pixel.
20. The device of claim 1 , further comprising a first emissive region comprising a blue emissive material.
21. The device of claim 20 , further comprising a second emissive region comprising a green emissive material.
22. The device of claim 21 , wherein the green emissive material is phosphorescent.
23. The device of claim 22 , wherein the blue emissive material is fluorescent.
24. The device of claim 22 , wherein the blue emissive material is phosphorescent.