Method of manufacturing organic EL display panel, organic EL display panel, and organic EL display device
In a method for manufacturing an organic EL display panel including: preparing a substrate; forming pixel electrodes in a matrix of rows and columns; forming banks extending in a column direction at least between the pixel electrodes in a row direction; forming a first light emitting layer by applying an ink including a light emitting material in a first gap selected from a plurality of gaps between the banks; forming a second light emitting layer by a vapor deposition method to be continuous above both the first light emitting layer and the pixel electrodes in a second gap adjacent in the row direction to the first gap; and forming a counter electrode above the second light emitting layer, a height of portions of the banks adjacent to the second gap is made to be greater than a height of portions of the banks adjacent to the first gap.
1. An organic electroluminescence (EL) display panel comprising:
a substrate;
pixel electrodes arranged in a matrix of rows and columns above the substrate;
banks disposed above the substrate, each of the banks extending in a column direction between the pixel electrodes in a row direction;
a first light emitting layer disposed above the pixel electrodes in a first gap selected from a plurality of gaps between the banks, wherein the first light emitting layer includes a light emitting material that emits red light;
a second light emitting layer that is continuous above both the first light emitting layer and the pixel electrodes in a second gap adjacent in the row direction to the first gap, wherein the second light emitting layer includes a light emitting material that emits blue light; and
a counter electrode disposed above the second light emitting layer, wherein
the banks adjacent to the second gap includes a first upper end adjacent to the first light emitting layer and a second upper end facing the first upper end adjacent to the first light emitting layer, and a height of the first upper end is less than a height of the second upper end, and
the first upper end portion has a uniform height in the column direction along an entirety of the column direction of the organic EL display panel;
a third light emitting layer disposed above the pixel electrodes in a third gap adjacent in the row direction to the second gap, wherein the third light emitting layer includes a light emitting material that emits green light, the second light emitting layer is also continuous above the third light emitting layer, and a width of the banks adjacent to both the first gap and the third gap is greater than a width of the banks adjacent to the second gap.
2. The organic EL display panel of claim 1 , wherein
a height of the banks adjacent to both the first gap and the third gap is the same as a height of a portion adjacent to the first gap of the banks adjacent to the second gap.
3. The organic EL display panel of claim 1 , wherein
a width in the row direction of the second gap is less than a width in the row direction of the first gap.
4. The organic EL display panel of claim 1 , further comprising
a first functional layer between the first light emitting layer and the pixel electrodes in the first gap, wherein
the first functional layer is not present between the second light emitting layer and the pixel electrodes in the second gap.
5. The organic EL display panel of claim 1 , further comprising
a second functional layer between the second light emitting layer and the first light emitting layer and between the second light emitting layer and the pixel electrodes in the second gap.
6. An organic electroluminescence (EL) display device comprising the organic EL display panel of claim 1 .