Display device and method of making display device
View Patent ↗A display device with increased lifespan is presented. The device includes a plurality of thin film transistors, a passivation layer formed on the thin film transistors, a plurality of pixel electrodes formed on the passivation layer and electrically connected to the thin film transistors, and a wall dividing the pixel electrodes. The wall has a main section and an auxiliary section that is lower than the main section. A caved-in section is disposed between the main section and the auxiliary section. An organic layer is formed on the pixel electrodes.
1. A display device comprising:
a plurality of thin film transistors;
a passivation layer formed on the thin film transistors;
a plurality of pixel electrodes formed on the passivation layer and electrically connected to the thin film transistors;
a wall dividing the pixel electrodes, the wall having a main wall and an auxiliary wall that is lower than the main wall; and
an organic layer formed on the pixel electrodes.
2. The display device according to claim 1 , wherein the organic layer formed on the auxiliary wall is thinner than the organic layer on the pixel electrode.
3. The display device according to claim 2 , wherein the height of the auxiliary wall is about 50% to about 90% of the height of the main wall.
4. The display device according to claim 3 , wherein the height of the auxiliary wall is in the range of about 0.25 μm to about 4.5 μm.
5. The display device according to claim 4 , wherein the organic layer comprises a hole-injecting layer and a light-emitting layer.
6. The display device according to claim 5 , wherein the hole-injecting layer comprises a material selected from the group consisting of poly-3,4-ethylenedioxythiophene and poly styrenesulfonate.
7. The display device according to claim 5 , wherein the light-emitting layer comprises a material selected from the group consisting of polyfluorene derivatives, poly(p-phenylene vinylene) derivatives, polyphenylene derivatives, poly(N-vinylcarbazole) derivatives, poly thiophene derivatives and compounds thereof doped with a perillene group pigment, rhodamine, rubrene, perillene, 9,10-diphenylanthracene, tetraphenylbutadiene, nile red, cumarine 6, quinacridone.
8. The display device according to claim 2 , wherein the organic layer comprises a light-emitting layer and a hole-injecting layer comprising a material selected from the group consisting of poly-3,4-ethylenedioxythiophene and poly styrenesulfonate.
9. The display device according to claim 2 , wherein the organic layer comprises a hole-injecting layer and a light-emitting layer comprising a material selected from the group consisting of polyfluorene derivatives, poly(p-phenylene vinylene) derivatives, polyphenylene derivatives, poly(N-vinylcarbazole) derivatives, poly thiophene derivatives and compounds thereof doped with a perillene group pigment, rhodamine, rubrene, perillene, 9,10-diphenylanthracene, tetraphenylbutadiene, nile red, cumarine 6, quinacridone.
10. The display device according to 1 , wherein the height of the auxiliary wall is about 50% to about 90% of the height of the main wall.
11. The display device according to claim 10 , wherein the height of the auxiliary wall is in the range of about 0.25 μm to about 4.5 μm.
12. The display device according to claim 11 , wherein the organic layer comprises a light-emitting layer and a hole-injecting layer comprising a material selected from the group consisting of poly-3,4-ethylenedioxythiophene and poly styrenesulfonate.
13. The display device according to claim 11 , wherein the organic layer comprises a hole-injecting layer and a light-emitting layer comprising a material selected from the group consisting of polyfluorene derivatives, poly(p-phenylene vinylene) derivatives, polyphenylene derivatives, poly(N-vinylcarbazole) derivatives, poly thiophene derivatives and compounds thereof doped with a perillene group pigment, rhodamine, rubrene, perillene, 9,10-diphenylanthracene, tetraphenylbutadiene, nile red, cumarine 6, quinacridone.
14. The display device according to claim 1 , wherein the organic layer comprises a light-emitting layer and a hole-injecting layer comprising a material selected from the group consisting of poly-3,4-ethylenedioxythiophene and poly styrenesulfonate.
15. The display device according to claim 1 , wherein the organic layer comprises a hole-injecting layer and a light-emitting layer comprising a material selected from the group consisting of polyfluorene derivatives, poly(p-phenylene vinylene) derivatives, polyphenylene derivatives, poly(N-vinylcarbazole) derivatives, poly thiophene derivatives and compounds thereof doped with a perillene group pigment, rhodamine, rubrene, perillene, 9,10-diphenylanthracene, tetraphenylbutadiene, nile red, cumarine 6, quinacridone.