Display panel, method of manufacturing the same, and substrate
According to one embodiment, a display panel includes a substrate, a first insulating layer, and a plurality of pixels including sub-pixels of a plurality of colors, respectively. Each of the sub-pixels includes a drive transistor, a pixel electrode supplied with a signal having a current value controlled from the drive transistor, and a light emitting element mounted on the pixel electrode. Each of the pixels includes a mounting electrode located to be spaced apart from the pixel electrode. The mounting electrode is in an electrically floating state in a first pixel of the plurality of pixels.
1 . A display panel comprising:
a substrate;
a first insulating layer provided on the substrate; and
a plurality of pixels provided on the substrate, located in a display area, and including sub-pixels of a plurality of colors, respectively;
each of the sub-pixels including:
a drive transistor covered with the first insulating layer;
a pixel electrode arranged on the first insulating layer, electrically connected to the drive transistor, and supplied with a signal having a current value controlled from the drive transistor; and
a light emitting element mounted on the pixel electrode and including a first electrode electrically connected to the pixel electrode;
each of the pixels including a mounting electrode arranged on the first insulating layer and located to be spaced apart from the pixel electrode,
the mounting electrode being in an electrically floating state in a first pixel of the plurality of pixels,
a second pixel of the plurality of pixels further includes an additional light emitting element of a first color mounted on the mounting electrode and including a first electrode electrically connected to the mounting electrode,
in the second pixel,
the mounting electrode is electrically connected to the drive transistor of the sub-pixel of the first color and is supplied with a signal having the current value controlled from the drive transistor, and
when the signal having the current value controlled is supplied from the drive transistor of the sub-pixel of the first color to the pixel electrode of the sub-pixel of the first color and the mounting electrode, the light emitting element of the first color of the sub-pixel of the first color does not emit light, but the additional light emitting element of the first color emits light, and
the second pixel further includes a wiring layer located on the first insulating layer to connect the pixel electrode of the sub-pixel of the first color with the mounting electrode.
2 . The display panel of claim 1 , wherein
the wiring layer is a metallized layer.
3 . The display panel of claim 2 , wherein
the wiring layer is located between the additional light emitting element and the mounting electrode of the second pixel and, and
the additional light emitting element is mounted on the wiring layer.
4 . The display panel of claim 1 , wherein
the wiring layer is located between the additional light emitting element and the mounting electrode of the second pixel and, and
the additional light emitting element is mounted on the wiring layer.
5 . The display panel of claim 1 , further comprising:
a second insulating layer located on the pixel electrodes, the mounting electrodes, and the wiring layer, covering the pixel electrodes, the mounting electrodes, and the wiring layer, and exposing the light emitting elements and the additional light emitting element.
6 . The display panel of claim 5 , further comprising:
a common electrode arranged on the second insulating layer, the light emitting elements, and the additional light emitting element, and shared by the sub-pixels,
wherein
each of the light emitting elements and the additional light emitting element includes a second electrode electrically connected to the common electrode.
7 . The display panel of claim 6 , wherein
in the second pixel, a current does not flow between the pixel electrode of the sub-pixel of the first color and the common electrode via the light emitting element of the first color.
8 . The display panel of claim 1 , wherein
each of the light emitting element and the additional light emitting element is a micro-light-emitting diode.