Display panel with reinforced conductive traces
A display panel includes a substrate, a plurality of LEDs, a planarization layer, and a patterned first conductive layer. The plurality of LEDs are on the substrate, each of the plurality of LEDs includes a first electrode facing a front side of the display panel. The planarization layer covers the plurality of LEDs. The first conductive layer is on the planarization layer. The planarization layer defines a plurality of holes, the electrode is exposed by a corresponding hole of the plurality of holes, and the first conductive layer electrical connects to the first electrode through the corresponding hole. The first conductive layer further comprises a trace portion and a plurality of reinforcing portions, each of the plurality of reinforcing portions is aligned with the corresponding hole and is attached to the trace portion. Methods of fabricating the display panel are further disclosed.
1 . A display panel comprising:
a substrate;
a plurality of light emitting diodes (LEDs) on the substrate, each of the plurality of LEDs comprising a first electrode facing a front side of the display panel;
a planarization layer on the substrate, the planarization layer covering the plurality of LEDs;
a first conductive layer on the planarization layer, a pattern being defined on the first conductive layer; and
a second conductive layer between the substrate and the planarization layer;
wherein the planarization layer defines a plurality of holes, the first electrode is exposed by a corresponding hole of the plurality of holes, and the first conductive layer is electrically connected to the first electrode through the corresponding hole; the first conductive layer comprises a trace portion and a plurality of reinforcing portions, each of the plurality of reinforcing portions is aligned with the corresponding hole and is attached to the trace portion; a pattern is defined on the second conductive layer, the second conductive layer comprises a plurality of connecting pads, a corresponding LED of the plurality of LEDs is on a corresponding connecting pad of the plurality of connecting pads, and the corresponding LED comprises a second electrode configured for electrically connecting to the corresponding connecting pad.
2 . The display panel of claim 1 , wherein the plurality of reinforcing portions is on a side of the trace portion facing the front side of the display panel, the trace portion attaches to a wall of each of the plurality of holes, and is electrically connected to each of the first electrodes; each of the plurality of reinforcing portions attaches to the trace portion and covers the corresponding hole.
3 . The display panel of claim 2 , wherein the trace portion comprises:
a planar portion on a top surface of the planarization layer away from the substrate; and
a plurality of bent portions corresponding to the plurality of holes;
wherein each of the plurality of bent portions is connected to the planar portion, attached to a wall of the corresponding hole, and extends to contact a surface of the corresponding first electrode facing the front side of the display panel, thereby electrically connecting the corresponding first electrode.
4 . The display panel of claim 1 , wherein the plurality of reinforcing portions is made of a metal material.
5 . The display panel of claim 1 , wherein the trace portion is made of a transparent conductive material.
6 . The display panel of claim 1 , wherein each of the plurality of reinforcing portions is filled in the corresponding hole and electrically connected to the first electrode, the trace portion covers the plurality of reinforcing portions and is electrically connected to the first electrode through the plurality of reinforcing portions.
7 . The display panel of claim 6 , wherein a side of the plurality of reinforcing portions facing the front side of the display panel is flush with the planarization layer.
8 . The display panel of claim 6 , wherein the plurality of reinforcing portions is made of conductive paste.
9 . The display panel of claim 1 , wherein the plurality of LEDs comprises: a plurality of first LEDs, a plurality of second LEDs, and a plurality of third LEDs; each of the plurality of first LEDs, the plurality of second LEDs, and the plurality of third LEDs emits light of a color different from each other.
10 . The display panel of claim 1 , wherein thicknesses of the plurality of LEDs are different, and depths of the plurality of holes are different corresponding to the thicknesses of the plurality of LEDs.
11 . A display panel comprising:
a substrate;
a plurality of light emitting diodes (LEDs) on the substrate, each of the plurality of LEDs comprising a first electrode facing a front side of the display panel;
a planarization layer on the substrate, the planarization layer covering the plurality of LEDs;
a first conductive layer on the planarization layer; and a pattern defined on the first conductive layer;
wherein the planarization layer defines a plurality of holes, the first electrode is exposed by a corresponding hole of the plurality of holes, and the first conductive layer is electrically connected to the first electrode through the corresponding hole; the first conductive layer comprises a trace portion and a plurality of reinforcing portions, each of the plurality of reinforcing portions is aligned with the corresponding hole and is attached to the trace portion; and the plurality of reinforcing portions and the trace portion are made of different conductive materials.
12 . The display panel of claim 11 , wherein the plurality of reinforcing portions is on a side of the trace portion facing the front side of the display panel, the trace portion is attached to a wall of each of the plurality of holes, and electrically connected to each of the first electrodes; and each of the plurality of reinforcing portions is attached to the trace portion and covers the corresponding hole.
13 . The display panel of claim 12 , wherein the plurality of reinforcing portions is made of a metal material, and the trace portion is made of a transparent conductive material.
14 . The display panel of claim 12 , wherein the trace portion comprises:
a planar portion on a top surface of the planarization layer away from the substrate; and
a plurality of bent portions corresponding to the plurality of holes;
wherein each of the plurality of bent portions is connected to the planar portion, attached to a wall of the corresponding hole, and extends to contact a surface of the corresponding first electrode facing the front side of the display panel, thereby electrically connecting the corresponding first electrode.
15 . The display panel of claim 11 , wherein each of the plurality of reinforcing portions is filled into the corresponding hole and electrically connected to the first electrode, the trace portion covers the plurality of reinforcing portions and is electrically connected to the first electrode through the plurality of reinforcing portions.
16 . The display panel of claim 15 , wherein a side of the plurality of reinforcing portions facing the front side of the display panel is flush with the planarization layer.
17 . The display panel of claim 15 , wherein the plurality of reinforcing portions is made of conductive paste, and the trace portion is made of a transparent conductive material.
18 . The display panel of claim 11 , wherein the plurality of LEDs comprises: a plurality of first LEDs, a plurality of second LEDs, and a plurality of third LEDs; each of the plurality of first LEDs, the plurality of second LEDs, and the plurality of third LEDs emits light of a color different from each other.
19 . The display panel of claim 11 , further comprising a second conductive layer between the substrate and the planarization layer; wherein a pattern is defined on the second conductive layer, the second conductive layer comprises a plurality of connecting pads, and a corresponding LED of the plurality of LEDs is on a corresponding connecting pad of the plurality of connecting pads, and the corresponding LED comprises a second electrode configured for electrically connecting to the corresponding connecting pad.
20 . The display panel of claim 11 , wherein thicknesses of the plurality of LEDs are different, and depths of the plurality of holes are different corresponding to the thicknesses of the plurality of LEDs.