Organic electroluminescent device, manufacturing method therefor, and electronic devices therewith
View Patent ↗A method for manufacturing an organic EL device comprising: coating a composition including an organic EL material on a plurality of electrodes to form an organic EL layer on each electrode; defining an effectively optical area in which the plurality of electrodes are formed; and defining a coating area which is broader than the effectively optical area, on which the composition including an organic EL material is to be coated. According to this method, a uniform display device without uneven luminance and uneven chrominance within a pixel or among a plurality of pixels in the effectively optical area can be obtained.
1. An organic EL device having an effective optical area in which a plurality of display pixels related to display are arranged in a matrix and a dummy area in which a plurality of dummy pixels not related to display are arranged, comprising:
a substrate;
a first electrode covering all of the display pixels; and
second electrodes arranged in the display pixels, each of the second electrodes being disposed between the substrate and the first electrode;
one of the display pixels including a first layer of a first organic EL material arranged between the first electrode and one of the second electrodes,
one of the dummy pixels including a second layer of a second organic EL material arranged between the substrate and the first electrode,
the dummy area being arranged to surround the effective optical area.
2. The organic EL device as set forth in claim 1 ,
wherein the display pixels are separated from the dummy pixels by a partition wall.
3. The organic EL device as set forth in claim 1 , wherein all of the display pixels and all of the dummy pixels are formed in a longitudinal direction at a pitch that is about 3 times greater than a pitch at which all of the display pixels and all of the dummy pixels are formed in a lateral direction.
4. The organic EL device as set forth in claim 1 , further comprising:
third electrodes arranged in the dummy pixels;
the second layer of the one of the dummy pixels being arranged between one of the third electrodes and the first electrode.
5. The organic EL device as set forth in claim 4 ,
wherein in the effective optical area, a TFT is arranged connected to one of the second electrodes; and
in the dummy area, each of the third electrodes is provided in the absence of a TFT.
6. The organic EL device as set forth in claim 5 ,
wherein the display pixels are separated from the dummy pixels by a partition wall.
7. The organic EL device as set forth in claim 5 , wherein some adjacent display pixels of the display pixels and some adjacent dummy pixels of the dummy pixels are aligned in the same direction, and a pitch of the adjacent display pixels is substantially the same as a pitch of the adjacent dummy pixels.
8. The organic EL device as set forth in claim 1 , the dummy pixels being arranged in only the dummy area.
9. The organic EL device as set forth in claim 1 ,
wherein adjacent display pixels of the display pixels are separated from each other by a partition wall.
10. The organic EL device as set forth in claim 9 ,
wherein adjacent dummy pixels of the dummy pixels are separated from each other by the partition wall.
11. The organic EL device according to claim 1 ,
the first organic EL material and the second organic EL material being the same material.
12. The organic EL device according to claim 1 ,
the first organic EL material and the second organic EL material being different materials.
13. An organic EL device having an effective optical area in which a plurality of display pixels related to display are arranged in a matrix and a dummy area in which a plurality of dummy pixels not related to display are arranged, comprising:
a substrate;
a first electrode opposing the display pixels and the dummy pixels; and
second electrodes arranged in the display pixels, each of the second electrodes being disposed between the substrate and the first electrode;
one of the display pixels including a first layer of a first organic EL material arranged between the first electrode and one of the second electrodes,
one of the dummy pixels including a second layer of a second organic EL material arranged between the substrate and the first electrode,
the dummy area being arranged outside the effective optical area, the dummy pixels being arranged only in the dummy area.
14. The organic EL device as set forth in claim 13 ,
wherein the display pixels and the dummy pixels are separated from each other by a partition wall.
15. The organic EL device as set forth in claim 13 , further comprising:
third electrodes arranged in the dummy pixels;
the second layer of the one of the dummy pixels being arranged between one of the third electrodes and the first electrode.
16. The organic EL device as set forth in claim 15 ,
wherein the display pixels are separated from the dummy pixels by a partition wall.
17. The organic EL device as set forth in claim 15 ,
wherein adjacent display pixels of the display pixels are separated from each other by a partition wall.
18. The organic EL device as set forth in claim 17 ,
wherein adjacent dummy pixels of the dummy pixels are separated from each other by the partition wall.
19. The organic EL device according to claim 13 ,
the first organic EL material and the second organic EL material being the same material.
20. The organic EL device according to claim 13 ,
the first organic EL material and the second organic EL material being different materials.