Self-luminous display panel and self-luminous display panel manufacturing method
A display panel including auxiliary wiring on a substrate, pixel electrodes in a matrix above the substrate with gaps between the pixel electrodes, light emitting layers above the pixel electrodes, a functional layer above and continuous across the light emitting layers, and a common electrode above and continuous across the functional layer. The auxiliary wiring extends in plane directions of a main surface of the substrate below the pixel electrodes. Above the substrate, connection areas CA exist where the pixel electrodes are not present, in which the common electrode and the auxiliary wiring are electrically connected to each other. In plan view, portions of outer edges of the pixel electrodes facing outer edges of the connection areas CA are recessed inwards of the pixel electrodes.
1. A self-luminous display panel comprising:
a substrate;
auxiliary wiring disposed on the substrate;
pixel electrodes disposed in a matrix of rows and columns above the substrate with defined gaps between the pixel electrodes;
light emitting layers disposed above the pixel electrodes;
a functional layer disposed above the light emitting layers, the functional layer being continuous across the light emitting layers; and
a common electrode disposed above the functional layer, the common electrode being continuous across the functional layer, wherein
the auxiliary wiring extends in plane directions of a main surface of the substrate below a first part of the pixel electrodes
above the substrate, connection areas exist where the pixel electrodes are not present, in which the common electrode and the auxiliary wiring are electrically connected to each other, and
in plan view, portions of outer edges of the pixel electrodes facing outer edges of the connection areas are recessed inwards of the pixel electrodes,
wherein in a first portion, the outer edge of the pixel electrode is recessed inward, and the first portion overlaps with the auxiliary wiring, which forms a self-luminous region due to the light-emitting layer above the pixel electrode.
2. The self-luminous display panel of claim 1 , wherein
portions of the functional layer above the connection areas are removed to create openings, and
the common electrode is in contact with the auxiliary wiring or electrodes or a layer electrically connected to the auxiliary wiring exposed by the openings in the functional layer.
3. The self-luminous display panel of claim 1 , further comprising:
column banks disposed above gaps between the pixel electrodes, the column banks extending in a column direction and arranged side by side, wherein
the auxiliary wiring extends in a row direction and/or the column direction in plan view of the substrate,
the light emitting layers are disposed in gaps between the column banks so as to be continuous in any given gap above a plurality of the pixel electrodes,
some or all of the column banks include widened portions that include the connection areas in plan view, and
the widened portions each have a shape in which an opening is provided that penetrates through the widened portion in a height direction and includes one of the openings of the functional layer in plan view.
4. The self-luminous display panel of claim 3 , further comprising:
row banks disposed above gaps between the pixel electrodes, the row banks extending in the row direction, arranged side by side, and connected to the column banks, wherein
the row banks are connected to the widened portions of the column banks.
5. The self-luminous display panel of claim 3 , wherein
the widened portions of the column banks are arranged in the column direction at a pitch larger than a pitch of the pixel electrodes.
6. The self-luminous display panel of claim 5 , wherein
among the column banks that include widened portions, positions of the widened portions in the column direction are different for any two of the column banks that are adjacent to each other in the row direction.
7. The self-luminous display panel of claim 6 , wherein
positions of the widened portions in the column direction are the same for any two of the column banks that include widened portions and sandwich in the row direction another one of the column banks that includes widened portions.
8. The self-luminous display panel of claim 3 , further comprising:
row banks disposed above gaps between the pixel electrodes, the row banks extending in the row direction, arranged side by side, and connected to the column banks, wherein
in plan view, the connection areas overlap with the row banks and are separated from the column banks by at least a defined distance.
9. The self-luminous display panel of claim 1 , further comprising:
a light shielding layer disposed above and covering the gaps between the pixel electrodes, wherein
the light shielding layer includes widened portions covering the connection areas in plan view.
10. The self-luminous display panel of claim 1 , wherein
in plan view, outer edges of the pixel electrodes around the connection areas are arranged to face the outer edges of the connection areas in the row direction and the column direction.