Organic EL display panel and method of manufacturing the same, organic EL display device and electronic apparatus
An organic EL display panel includes a substrate, an interlayer insulation layer formed over the substrate, and an organic EL light emitting section formed over the interlayer insulation layer. The organic EL light emitting section includes a plurality of pixel electrodes arranged in a matrix pattern, a plurality of partition walls each of which is disposed between the pixel electrodes adjacent to each other in a row direction and extends in a column direction, an organic layer including a light emitting layer formed in a region partitioned by the partition walls, and a counter electrode formed on an upper side of the organic layer, and includes a first light emitting section for a first color and a second light emitting section for a second color. The first and second light emitting sections are different in thickness of the organic layer and in digging amount of the interlayer insulation layer in the region partitioned by the partition walls.
1. An organic electroluminescent display panel, comprising:
a substrate;
an interlayer insulation layer formed over the substrate; and
an organic electroluminescent light emitting section formed over the interlayer insulation layer, wherein
the organic electroluminescent light emitting section includes:
a plurality of pixel electrodes arranged in a matrix pattern over the interlayer insulation layer,
a plurality of partition walls, wherein
each partition wall of the plurality of partition walls is disposed between corresponding pixel electrodes of the plurality of pixel electrodes,
the corresponding pixel electrodes are adjacent to each other in a row direction, and
each partition wall of the plurality of partition walls extends in a column direction,
an organic layer including a light emitting layer formed in a region partitioned by the plurality of partition walls,
a counter electrode formed on an upper side of the organic layer,
a first light emitting section having a light emitting layer that emits light in a first color, and
a second light emitting section having a light emitting layer that emits light in a second color different from the first color, wherein
the first light emitting section and the second light emitting section are different in thickness of the organic layer,
the first light emitting section and the second light emitting section are different in digging amount of the interlayer insulation layer in the region partitioned by the plurality of partition walls, and
one of the first light emitting section or the second light emitting section which is longer in a wavelength of light emission color is greater than the other light emitting section in the digging amount of the interlayer insulation layer.
2. The organic electroluminescent display panel according to claim 1 ,
wherein a height of the plurality of partition walls and the digging amount of the interlayer insulation layer are set in such a manner that a difference between a height of a pinning position where an upper surface of the organic layer and a partition wall of the plurality of partition walls make contact with each other in the first light emitting section and the second light emitting section and a height of a central position of the upper surface of the organic layer is not more than a predetermined value.
3. The organic electroluminescent display panel according to claim 2 ,
wherein the difference between the height of the pinning position where the upper surface of the organic layer and the partition wall make contact with each other and the height of the central position of the upper surface of the organic layer is not more than 700 nm.
4. The organic electroluminescent display panel according to claim 1 , wherein a bottom surface of a dug portion of the interlayer insulation layer is flat.
5. The organic electroluminescent display panel according to claim 1 ,
wherein each pixel electrode of the plurality of pixel electrodes includes a light reflective metal thin film.
6. An organic electroluminescent display device, comprising:
an organic electroluminescent display panel including:
a substrate,
an interlayer insulation layer formed over the substrate, and
an organic electroluminescent light emitting section formed over the interlayer insulation layer, wherein
the organic electroluminescent light emitting section includes:
a plurality of pixel electrodes arranged in a matrix pattern over the interlayer insulation layer,
a plurality of partition walls, wherein
each partition wall of the plurality of partition walls is disposed between corresponding pixel electrodes of the plurality of pixel electrodes,
the corresponding pixel electrodes are adjacent to each other in a row direction, and
each partition wall of the plurality of partition walls extends in a column direction,
an organic layer including a light emitting layer formed in a region partitioned by the plurality of partition walls,
a counter electrode formed on an upper side of the organic layer,
a first light emitting section having a light emitting layer that emits light in a first color, and
a second light emitting section having a light emitting layer that emits light in a second color different from the first color, wherein
the first light emitting section and the second light emitting section are different in thickness of the organic layer,
the first light emitting section and the second light emitting section are different in digging amount of the interlayer insulation layer in the region partitioned by the plurality of partition walls, and
one of the first light emitting section or the second light emitting section which is longer in a wavelength of light emission color is greater than the other light emitting section in the digging amount of the interlayer insulation layer; and
a driving section configured to drive the organic electroluminescent display panel to display an image.
7. An electronic apparatus comprising, as an image display section:
an organic electroluminescent display device including:
an organic electroluminescent display panel that includes:
a substrate,
an interlayer insulation layer formed over the substrate, and
an organic electroluminescent light emitting section formed over the interlayer insulation layer, wherein
the organic electroluminescent light emitting section includes:
a plurality of pixel electrodes arranged in a matrix pattern over the interlayer insulation layer,
a plurality of partition walls, wherein
each partition wall of the plurality of partition walls is disposed between corresponding pixel electrodes of the plurality of pixel electrodes,
the corresponding pixel electrodes are adjacent to each other in a row direction, and
each partition wall of the plurality of partition walls extends in a column direction,
an organic layer including a light emitting layer formed in a region partitioned by the plurality of partition walls,
a counter electrode formed on an upper side of the organic layer,
a first light emitting section having a light emitting layer that emits light in a first color, and
a second light emitting section having a light emitting layer that emits light in a second color different from the first color, wherein
the first light emitting section and the second light emitting section are different in thickness of the organic layer,
the first light emitting section and the second light emitting section are different in digging amount of the interlayer insulation layer in the region partitioned by the plurality of partition walls, and
one of the first light emitting section or the second light emitting section which is longer in a wavelength of light emission color is greater than the other light emitting section in the digging amount of the interlayer insulation layer; and
a driving section configured to drive the organic electroluminescent display panel to display an image.