Organic light emitting display device
View Patent ↗An organic light emitting display device includes a substrate and a plurality of pixels on the substrate. The pixels include a plurality of first electrodes, a second electrode, a white light emitting layer, and a first thin film layer between the first electrodes and the second electrode. White light emitted from the white light emitting layer causes resonance to occur between the first electrodes and the second electrode.
1. An organic light emitting display device comprising:
a substrate; and
a plurality of pixels on the substrate, each being configured to emit light of one of a plurality of second colors for forming white light when combined, the plurality of pixels comprising:
a plurality of first electrodes;
a second electrode;
a white light emitting layer between the first electrodes and the second electrode and comprising a plurality of light emitting layers, each being configured to emit light of one of a plurality of first colors for forming white light when combined;
a first thin film layer between the first electrodes and the second electrode, the first thin film layer having a plurality of thicknesses corresponding to the plurality of second colors; and
color filters in only some of the plurality of pixels based on the color of light emitted by the some of the plurality of pixels,
wherein each of the plurality of pixels is further configured to emit light of the one of the plurality of second colors when white light emitted from the white light emitting layer causes resonance to occur between the first electrodes and the second electrode.
2. The organic light emitting display device of claim 1 , wherein the first thin film layer comprises at least one selected from the group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer, an electron transport layer, and an electron blocking layer.
3. The organic light emitting display device of claim 2 , wherein the first thin film layer exists in less than all of the plurality of pixels.
4. The organic light emitting display device of claim 2 , wherein the first thin film layer is formed by using one selected from the group consisting of laser induced thermal imaging (LITI), inkjet printing, and nozzle printing.
5. The organic light emitting display device of claim 1 , wherein the plurality of pixels further comprises a second thin film layer between the first electrodes and the second electrode.
6. The organic light emitting display device of claim 5 , wherein the second thin film layer comprises at least one selected from the group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer, an electron transport layer, and an electron blocking layer.
7. The organic light emitting display device of claim 5 , wherein the second thin film layer is concurrently formed for each of the plurality of pixels.
8. The organic light emitting display device of claim 1 , wherein the plurality of first colors is the same as the plurality of second colors.
9. The organic light emitting display device of claim 1 , wherein the plurality of first colors comprises three colors.
10. The organic light emitting display device of claim 9 , wherein the plurality of first colors comprises red, green, and blue.
11. The organic light emitting display device of claim 1 , wherein the plurality of second colors comprises three colors.
12. The organic light emitting display device of claim 11 , wherein the plurality of second colors comprises red, green, and blue.
13. The organic light emitting display device of claim 1 , further comprising a pixel-defining layer formed around the first electrodes to define a light emitting region of the plurality of pixels.
14. The organic light emitting display device of claim 1 , further comprising a sealing member on the second electrode to seal the white light emitting layer and the first thin film layer.
15. The organic light emitting display device of claim 14 , wherein the sealing member comprises a substrate formed of glass.
16. The organic light emitting display device of claim 14 , wherein the sealing member comprises a plurality of thin film layers formed by alternating a plurality of organic layers and inorganic layers.
17. The organic light emitting display device of claim 14 , further comprising a filling member between the second electrode and the sealing member.
18. The organic light emitting display device of claim 1 , wherein the first electrodes are one of reflective electrodes and semitransparent electrodes and the second electrode is one of a reflective electrode and a semitransparent electrode.
19. An organic light emitting display device comprising:
a substrate; and
a plurality of pixels on the substrate, each being configured to emit red, green, or blue light, the plurality of pixels comprising:
a plurality of first electrodes;
a second electrode;
a white light emitting layer between the first electrodes and the second electrode and comprising light emitting layers configured to emit red, green, and blue light for forming white light when combined;
a first thin film layer between the first electrodes and the second electrode, the first thin film layer having
a first thickness in each of the plurality of pixels configured to emit red light,
a second thickness different than the first thickness in each of the plurality of pixels configured to emit green light, and
a third thickness different than the first and second thicknesses in each of the plurality of pixels configured to emit blue light; and
color filters in only some of the plurality of pixels based on the color of light emitted by the some of the plurality of pixels,
wherein each of the plurality of pixels is further configured to emit the one of red light, green light, or blue light when white light emitted from the white light emitting layer causes resonance to occur between the first electrodes and the second electrode, and
wherein light in the only some of the plurality of pixels is emitted through the color filters in the only some of the plurality of pixels, and
wherein light in remaining ones of the plurality of pixels is emitted without passing through the color filters.
20. The organic light emitting display device of claim 19 , wherein the first thin film layer comprises at least one selected from the group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer, an electron transport layer, and an electron blocking layer.
21. The organic light emitting display device of claim 19 , wherein the plurality of pixels further comprises a second thin film layer between the first electrodes and the second electrode.
22. The organic light emitting display device of claim 21 , wherein the second thin film layer comprises at least one selected from the group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer, an electron transport layer, and an electron blocking layer.
23. The organic light emitting display device of claim 19 , further comprising a sealing member on the second electrode to seal the white light emitting layer and the first thin film layer.
24. The organic light emitting display device of claim 23 , further comprising a filling member between the second electrode and the sealing member.
25. The organic light emitting display device of claim 19 , wherein the first electrodes are one of reflective electrodes and semitransparent electrodes and the second electrode is one of a reflective electrode and a semitransparent electrode.
26. The organic light emitting display device of claim 19 , wherein the color filters are on a surface of a sealing member or the substrate.
27. The organic light emitting display device of claim 26 , further comprising black matrix between the color filters.
28. The organic light emitting display device of claim 5 , wherein the second thin film layer is formed on the plurality of pixels as a common layer having a same thickness throughout.