Organic electroluminescent devices
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:
at least one 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.
2. The device of claim 1 , wherein the at least one color altering layers is N−1 color altering layers.
3. 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.
4. The device of claim 3 , wherein one of the N sub-pixels comprising the green emissive region is configured to emit blue light.
5. The device of claim 3 , wherein one of the N sub-pixels comprising the blue emissive region is configured to emit green light.
6. The device of claim 3 , wherein one of the N sub-pixels comprising the blue emissive region is configured to emit blue light.
7. The device of claim 1 , wherein the N sub-pixels comprise a common emissive region that extends into each of the N sub-pixels.
8. The device of claim 7 , wherein the common emissive region is a light blue emissive region.
9. The device of claim 8 , wherein the common emissive region comprises a plurality of emissive materials.
10. The device of claim 9 , wherein the common emissive region comprises green and blue emissive materials.
11. The device of claim 8 , 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.
12. 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.
13. 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.
14. The device of claim 13 , wherein the green sub-pixel comprises a green emissive region.
15. The device of claim 13 , wherein the green sub-pixel comprises a color filter and/or a down-conversion component.
16. The device of claim 1 , 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.
17. The device of claim 1 , further comprising a first emissive region comprising a green emissive material.
18. The device of claim 1 , wherein emissive elements of at least 1 sub-pixel of the plurality of N sub-pixels comprise a light-emitting diode (LED).
19. The device of claim 18 , wherein Nis equal to 3 and a first emissive layer is blue and a second emissive layer is green.
20. 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: at least one color altering layers, each disposed in a stack with one or more of the N sub-pixels; less than or equal to N- 1 emissive layers disposed within one or more of the N sub-pixels, wherein the one emissive layer is light blue.