Organic light emitting diode (OLED) display
An organic light emitting diode display includes a substrate main body; an organic light emitting element on the substrate main body; an encapsulation substrate covering the organic light emitting element and coupled to the substrate main body; a translucent insulating layer filter formed on the encapsulation substrate; and a microcavity between the translucent insulating layer filter and the encapsulation substrate.
1. An organic light emitting diode (OLED) display comprising:
a substrate main body;
an organic light emitting element on the substrate main body;
an encapsulation substrate covering the organic light emitting element and coupled to the substrate main body;
a translucent insulating layer filter contacting the encapsulation substrate, the translucent insulating layer filter and the encapsulation substrate forming a microcavity; and
an air layer between the organic light emitting element and the translucent insulating layer filter,
wherein the organic light emitting element comprises a red pixel portion, a green pixel portion, and a blue pixel portion,
wherein at least a portion of the translucent insulating layer filter overlaps each of the red, green, and blue pixel portions,
wherein the translucent insulating layer filter comprises a same material for the red, the green, and the blue pixel portions, and
wherein the translucent insulating layer filter comprises an organic insulating material selected from the group consisting of poly(3,4-ethylenedioxythiophene) (PEDOT); 4,4′-bis[N-(3-methylphenyl-N-phenyl amino)]biphenyl (TPD); 4,4′,4″-tris[(3-methylphenyl)phenyl amino]triphenylamine (m-MTDATA); 1,3,5-tris [N,N-bis(2-methylphenyl-amino]-benzene (o-MTDAB); 1,3,5-tris[N,N-bis(3-methylphenyl-amino]-benzene (m-MTDAB); 1,3,5-tris[N,N-bis(4-methylphenyl)-amino]-benzene (p-MTDAB); 4,4′-bis[N,N-bis(3-methylphenyl)-amino]-diphenylmethane (BPPM); 4,4′-dicarbazolyl-1,1′-biphenyl (CBP); 4,4′,4″-tris(N-carbazol)triphenylamine (TCTA); 2,2′,2″-(1,3,5-benzentolyl)tris-1-[phenyl-1H-benzoimidazol](TPBI); and 3-(4-biphenyl)-4-phenyl-5-t-butylphenyl-1,2,4-triazole (TAZ).
2. The OLED display of claim 1 , wherein the translucent insulating layer filter is on at least one of an inner surface of the encapsulation substrate facing the organic light emitting element, or an outer surface of the encapsulation substrate facing away from the organic light emitting element.
3. The OLED display of claim 2 , wherein the translucent insulating layer filter comprises separate patterned portions corresponding to the red pixel portion, the green pixel portion, and the blue pixel portion.
4. The OLED display of claim 3 , wherein the translucent insulating layer filter comprises a plurality of layers, and wherein a separate microcavity is present at each interface of adjacent layers.
5. The OLED display of claim 2 , wherein the translucent insulating layer filter comprises a first translucent insulating layer filter on the inner surface of the encapsulation substrate, and a second translucent insulating layer filter on the outer surface of the encapsulation substrate.
6. The OLED display of claim 5 , wherein:
the first translucent insulating layer filter comprises separate patterned portions corresponding to the red pixel portion, the green pixel portion, and the blue pixel portion; and
the second translucent insulating layer filter is a continuous layer corresponding to a total of the red pixel portion, the green pixel portion, and the blue pixel portion.
7. The OLED display of claim 6 , wherein the first translucent insulating layer comprises a plurality of layers, and wherein a separate microcavity is present at each interface of adjacent layers.
8. The OLED display of claim 5 , wherein:
the first translucent insulating layer filter is a continuous layer corresponding to a total of the red pixel portion, the green pixel portion, and the blue pixel portion; and
the second translucent insulating layer filter comprises separate patterned portions corresponding to the red pixel portion, the green pixel portion, and the blue pixel portion.
9. The OLED display of claim 8 , wherein the second translucent insulating layer comprises a plurality of layers, and wherein a separate micro cavity is present at each interface of adjacent layers.
10. The OLED display of claim 1 , wherein the translucent insulating layer filter comprises a plurality of layers, wherein at least one of the plurality of layers comprises the organic insulating material, and wherein at least another of the plurality of layers comprises a compound selected from the group consisting of silicon oxide, silicon nitride, and silicon oxy-nitride.