Display device including display elements and pixel circuits disposed in different areas
A display device may include a substrate including a first area and a second area surrounding the first area, and pixel circuits disposed on the substrate. The pixel circuits may include a first pixel circuit disposed in the first area and a second pixel circuit disposed in the first area. The display device may include display elements disposed on the substrate. The display elements may include a first display element that may be disposed in the first area and electrically connected to the first pixel circuit and a second display element that may be disposed in the second area and electrically connected to the second pixel circuit. Various embodiments are disclosed.
1. A display device comprising:
a substrate comprising a first area and a second area;
display elements disposed on the substrate and located in the first area, the display elements comprising a first pixel electrode and a second pixel electrode;
pixel circuits disposed on the substrate and located in the second area; and
driving circuits disposed in the first area and configured to provide a signal to each of the pixel circuits, wherein
the pixel circuits comprise:
a first pixel circuit including a driving transistor that provides a driving current to the first pixel electrode; and
a second pixel circuit including a driving transistor that provides a driving current to the second pixel electrode,
the first pixel electrode and the second pixel electrode are arranged along a first direction,
the first pixel circuit and the second pixel circuit are arranged along a second direction that intersects the first direction, and
each of the pixel circuits further includes:
a switching transistor disposed between a data line and the driving transistor; and
a storage capacitor connected to a gate of the driving transistor.
2. The display device of claim 1 , wherein the display elements each further comprise:
an opposite electrode disposed on the first and second pixel electrodes to overlap the first and second pixel electrodes;
a first intermediate layer between the first pixel electrode and the opposite electrode; and
a second intermediate layer between the second pixel electrode and the opposite electrode.
3. The display device of claim 2 , wherein the first pixel electrode and the second pixel electrode each extend from the first area to the second area to be connected to a respective driving transistor.
4. The display device of claim 2 , wherein the first pixel electrode extends along the first direction so as to completely cross the second intermediate layer.
5. The display device of claim 1 , further comprising a contact metal layer between the pixel circuits and the display elements, wherein
the contact metal layer extends from the first area to the second area and comprises at least one of a first contact metal layer connecting the first pixel circuit to the first pixel electrode and a second contact metal layer connecting the second pixel circuit to the second pixel electrode.
6. The display device of claim 5 , wherein the display elements each further comprise:
an opposite electrode disposed on the first and second pixel electrodes;
a first intermediate layer between the first pixel electrode and the opposite electrode; and
a second intermediate layer between the second pixel electrode and the opposite electrode, wherein
at least one of the first contact metal layer and the second contact metal layer electrically connects an electrode layer included in any one of the pixel circuits to a pixel electrode included in any one of the display elements.
7. The display device of claim 1 , wherein a number of the pixel circuits per unit area is greater than a number of the display elements per unit area.
8. The display device of claim 1 , wherein a number of the display elements disposed in the first area corresponds to a number of the pixel circuits disposed in the second area.
9. The display device of claim 1 , wherein the first area comprises a bending area.
10. The display device of claim 1 , wherein the first pixel electrode is directly between the second pixel electrode and the second area.
11. The display device of claim 1 , wherein
every transistor of the first pixel circuit is spaced apart in plan view from a portion of the first pixel electrode that is exposed by a pixel defining layer, and
every transistor of the second pixel circuit is spaced apart in plan view from a portion of the second pixel electrode that is exposed by the pixel defining layer.
12. The display device of claim 1 , further comprising:
third pixel circuits located in the second area, each third pixel circuit comprising a driving transistor that provides a driving current to a pixel electrode of a respective display element located in the second area.
13. The display device of claim 1 , wherein
the first area comprises a bending area,
the second area comprising a non-bending area, and
the driving circuits are disposed in the bending area and the each of the pixel circuits are disposed in the non-bending area.