Organic electroluminescent display and method for fabricating the same
View Patent ↗An organic electroluminescent display (OELD) device at least includes a first assembly and a second assembly. The first assembly has a first substrate and an organic electroluminescent unit formed on the first substrate. The second assembly, assembled with the first assembly, includes a second substrate, a color filter layer and a patterned light-shielding layer. The color filter layer is disposed on the second substrate and has plural colored regions with different colors. The patterned light-shielding layer is disposed on the color filter layer and between the colored regions. A part of the patterned light-shielding layer contacts the first assembly to maintain a cell gap between the first assembly and the second assembly.
1. An organic electroluminescent display (OELD) device, at least comprising:
a first assembly, having a first substrate and an organic electroluminescent unit formed on the first substrate;
a second assembly assembled with the first assembly, the second assembly comprising:
a second substrate;
a color filter layer disposed on the second substrate and having a plurality of colored filter regions with different heights in reference to the second substrate; and
a patterned light-shielding layer disposed on the color filter layer and in a step structure covering between the colored filter regions,
wherein a part of the step structure of the patterned light-shielding layer is disposed above the colored filter region having the greatest height and contacting the first assembly to maintain a cell gap between the first assembly and the second assembly.
2. The OELD device according to claim 1 , wherein the colored filter regions comprise a plurality of red sub-regions, a plurality of green sub-regions, a plurality of blue sub-regions and a plurality of white sub-regions, and each pixel region comprises one red, one green, one blue and one white sub-regions.
3. The OELD device according to claim 2 , wherein the part of the patterned light-shielding layer contacting the first assembly is correspondingly disposed in the blue sub-regions.
4. The OELD device according to claim 2 , wherein the red, the green, the blue and the white sub-regions of each pixel region are arranged as a strip-type color filter array or a quad-type color filter array, and the part of the patterned light-shielding layer contacting the first assembly is disposed between the blue sub-regions and adjacent sub-regions with different colors.
5. The OELD device according to claim 2 , further comprising a plurality of spacers disposed on the color filter layer and contacting the first assembly, and the spacers and the patterned light-shielding layer are formed by the same material.
6. The OELD device according to claim 5 , wherein the spacers are correspondingly disposed around the blue sub-regions.
7. The OELD device according to claim 1 , wherein the patterned light-shielding layer is disposed around the colored filter regions.
8. The OELD device according to claim 1 , wherein the patterned light-shielding layer is realized by a black matrix.
9. The OELD device according to claim 1 , further comprising a filler disposed between the first assembly and the second assembly, and the filler fills up the gap between the color filter layer and the patterned light-shielding layer.
10. A color filter assembly used in an OELD device, at least comprising:
a substrate;
a color filter layer disposed on the substrate and having a plurality of colored filter regions with different heights in reference to the substrate; and
a patterned light-shielding layer disposed on the color filter layer and in a step structure covering between the colored filter regions, wherein a part of the step structure of the patterned light-shielding layer is disposed above the colored filter region having the greatest height, to maintain a cell gap for the OELD device.
11. The color filter assembly according to claim 10 , wherein the colored filter regions comprises a plurality of red sub-regions, a plurality of green sub-regions, a plurality of blue sub-regions and a plurality of white sub-regions, and each pixel region comprises one red, one green, one blue and one white sub-regions.
12. The color filter assembly according to claim 11 , wherein the red, the green, the blue and the white sub-regions of each pixel region are arranged as a strip-type color filter array or a quad-type color filter array, and the part of the patterned light-shielding layer contacting the first assembly is disposed between the blue sub-regions and adjacent sub-regions with different colors.
13. The color filter assembly according to claim 11 , further comprising a plurality of spacers disposed on the color filter layer, and the spacers and the patterned light-shielding layer are formed by the same material.
14. The color filter assembly according to claim 13 , wherein the spacers are correspondingly disposed around the blue sub-regions.
15. The color filter assembly according to claim 10 , wherein the patterned light-shielding layer is disposed around the colored filter regions.
16. A method for fabricating an OELD device, wherein the method at least comprises:
providing a first assembly comprising a first substrate and an organic electroluminescent unit formed on the first substrate;
providing a second assembly, comprising:
a second substrate;
a color filter layer formed on the second substrate and having a plurality of color filter regions with different heights in reference to the second substrate; and
a patterned light-shielding layer disposed on the color filter layer and in a step structure covering between the colored filter regions;
assembling the first assembly and the second assembly, wherein a part of the step structure of the patterned light-shielding layer is disposed above the colored filter region having the greatest height, and contacting the first assembly to maintain a cell gap between the first assembly and the second assembly.
17. The fabricating method according to claim 16 , further comprising a filler disposed between the first assembly and the second assembly, wherein the filler fills up the gap between the color filter layer and the patterned light-shielding layer.
18. The fabricating method according to claim 16 , wherein the colored filter regions comprise a plurality of red sub-regions, a plurality of green sub-regions, a plurality of blue sub-regions and a plurality of white sub-regions, and each pixel region comprises one red, one green, one blue and one white sub-regions arranged as a strip-type color filter array or a quad-type color filter array, and the part of the patterned light-shielding layer contacting the first assembly is disposed between the blue sub-regions and adjacent sub-regions with different colors.
19. The fabricating method according to claim 18 , wherein a plurality of spacers is formed on the color filter layer at the same time with the step of forming the patterned light-shielding layer on the color filter layer.
20. The fabricating method according to claim 19 , wherein the spacers are correspondingly formed around the blue sub-regions.
21. The fabricating method according to claim 16 , wherein the patterned light-shielding layer of the second assembly is disposed around the colored filter regions.