Active matrix organic electroluminescent display and fabricating method thereof
View Patent ↗An active matrix organic electroluminescent display device includes a first substrate and a second substrate facing and spaced apart from each other, a thin film transistor on an inner surface of the first substrate, a first electrode connected to the thin film transistor, an organic electroluminescent layer on the first electrode, a second electrode on the organic electroluminescent layer, a passivation layer on the second electrode, a black matrix on an inner surface of the second substrate, the black matrix includes a plurality of open portions, a color filter layer at the plurality of open portions, a color changing layer on the color filter layer, an overcoat layer on the color changing layer, and an adhesive film between the passivation layer and the overcoat layer.
1. An active matrix organic electroluminescent display device, comprising:
a first substrate and a second substrate facing and spaced apart from each other;
a thin film transistor on an inner surface of the first substrate;
a first electrode connected to the thin film transistor;
an organic electroluminescent layer on the first electrode;
a second electrode on the organic electroluminescent layer;
a passivation layer on the second electrode;
a black matrix on an inner surface of the second substrate, the black matrix includes a plurality of open portions;
a color filter layer at the plurality of open portions, the color filter layer includes first, second, and third sub-color filters;
a color changing layer on the color filter layer, the color changing layer includes a first color changing medium on the first sub-color filter and a second color changing medium on the second sub-color filter;
an overcoat layer on the color changing layer; and
an adhesive film between the passivation layer and the overcoat layer,
wherein a sum of a thickness of the first color changing medium and a thickness of the first sub-color filter is substantially equal to a thickness of the third sub-color filter.
2. The device according to claim 1 , wherein each of the first, second, and third sub-color filters corresponds to one of the plurality of open portions.
3. The device according to claim 1 , wherein the organic electroluminescent layer emits blue light.
4. The device according to claim 3 , wherein the first color changing medium changes a color of light passing through the medium to red.
5. The device according to claim 3 , wherein the second color changing medium changes a color of light passing through the medium to green.
6. The device according to claim 1 , wherein a sum of a thickness of the second color changing medium and a thickness of the second sub-color filter is substantially equal to a thickness of the third sub-color filter.
7. The device according to claim 1 , wherein the second electrode includes a transparent conductive material.
8. The device according to claim 7 , wherein the first electrode includes an opaque conductive material.
9. The device according to claim 1 , wherein the first substrate comprises glass and the second substrate comprises plastic.
10. A method of fabricating an organic electroluminescent display device, comprising steps of:
forming a thin film transistor on a first substrate;
forming a first electrode connected to the thin film transistor;
forming an organic electroluminescent layer on the first electrode;
forming a second electrode on the organic electroluminescent layer;
forming a passivation layer on the second electroluminescent layer;
forming a black matrix on a second substrate, the black matrix has a plurality of open portions;
forming a color filter layer at the plurality of open portions, the color filter layer includes first, second, and third sub-color filters;
forming a color changing layer on the color filter layer, the color changing layer includes a first color changing medium on the first sub-color filter and a second color changing medium on the second sub-color filter;
forming an overcoat layer on the color changing layer; and
bonding the first substrate to the second substrate by interposing an adhesive film between the passivation layer and the overcoat layer,
wherein a sum of a thickness of the first color changing medium and a thickness of the first sub-color filter is substantially equal to a thickness of the third sub-color filter.
11. The method according to claim 10 , wherein each of the first, second, and third sub-color filters corresponds to one of the plurality of open portions.
12. The method according to claim 10 , wherein the organic electroluminescent layer emits blue light.
13. The method according to claim 12 , wherein the first color changing medium changes a color of light passing through the medium to red.
14. The method according to claim 12 , wherein the second color changing medium changes a color of light passing through the medium to green.
15. The device according to claim 10 , wherein a sum of a thickness of the second color changing medium and a thickness of the second sub-color filter is substantially equal to a thickness of the third sub-color filter.
16. The method according to claim 10 , wherein the second electrode includes a transparent conductive material.
17. The method according to claim 16 , wherein the first electrode includes an opaque conductive material.
18. The method according to claim 10 , wherein the first substrate includes glass and the second substrate includes plastic.