Light-emitting assembly, display device, and method for making light-emitting assembly
A light-emitting assembly with higher connection tolerances in manufacture includes a substrate, a light-emitting diode on the substrate, a transparent electrode, and a wire connected to the transparent electrode. The substrate includes a driving circuit connected to the light-emitting diode. The light-emitting diode includes a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode, the first electrode receiving the first driving signal. transparent electrode is connected to the second electrode. An orthographic projection area of the transparent electrode on the substrate is larger than an orthographic projection area of the second electrode on the substrate allowing less criticality in the alignment of signal wires for receiving the second driving signal. The light-emitting diode is configured to emit source light according to the first driving signal and the second driving signal.
1 . A light-emitting assembly comprising:
a substrate comprising a driving circuit configured for outputting a first driving signal;
a plurality of light-emitting diodes on the substrate and connected to the driving circuit, each of plurality of light-emitting diodes comprising a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode, the first electrode being connected to the driving circuit to receive the first driving signal;
a plurality of transparent electrodes electrically insulated from each other, each of the plurality of light-emitting diodes being connected to a corresponding one of the plurality of transparent electrodes, and the plurality of transparent electrodes being connected to a side of the second electrode away from the light-emitting layer, an orthographic projection area of each of the plurality of transparent electrodes on the substrate being larger than an orthographic projection area of the second electrode on the substrate; and
a plurality of wires connected to the plurality of transparent electrodes and each of the plurality of wires being configured to transmit a second driving signal, wherein each of the plurality of light-emitting diodes is configured to emit source light according to the first driving signal and the second driving signal.
2 . The light-emitting assembly of claim 1 , wherein the orthographic projection of each of the plurality of transparent electrodes on the substrate completely covers the orthographic projection of each of the plurality of second electrodes on the substrate.
3 . The light-emitting assembly of claim 1 , further comprising a plurality of connection pads, each of the plurality of connection pads connected between the second electrode and one of the plurality of transparent electrodes; wherein
the orthographic projection area of each of the plurality of transparent electrodes on the substrate is larger than an orthographic projection area of each of the plurality of connection pads on the substrate.
4 . The light-emitting assembly of claim 3 , wherein the plurality of connection pads are made of metal.
5 . The light-emitting assembly of claim 3 , wherein the orthographic projection of each of the plurality of transparent electrodes on the substrate completely covers the orthographic projection of each of the plurality of connection pads on the substrate.
6 . The light-emitting assembly of claim 1 , wherein the plurality of wires electrically connects to the driving circuit, and the driving circuit is configured to output the second driving signal.
7 . The light-emitting assembly of claim 1 , further comprising an insulation layer covering a surface of the substrate having the plurality of light-emitting diodes; wherein
the plurality of light-emitting diodes are embedded in the insulation layer;
the plurality of transparent electrodes are on a side of the insulation layer away from the substrate; and
each of the plurality of wires is at least partially on the side of the insulation layer away from the substrate.
8 . The light-emitting assembly of claim 7 , wherein each of the plurality of wires extends on a surface of the insulation layer away from the substrate.
9 . The light-emitting assembly of claim 7 , wherein a part of each of the plurality of wires extends on a surface of the insulation layer away from the substrate, and the other part of each of the plurality of wires extends on a surface of the substrate having the light emitting diode to electrically connect to the driving circuit.
10 . The light-emitting assembly of claim 1 , wherein the plurality of light-emitting diodes are configured to emit the source light of a same color.
11 . The light-emitting assembly of claim 1 , wherein the plurality of light-emitting diodes are configured to emit the source light of different color; and
the source light is configured to display an image.
12 . The light-emitting assembly of claim 1 , wherein the plurality of wires are made of metal.
13 . A display device comprising a light-emitting assembly and a display assembly; wherein the light-emitting assembly comprises:
a substrate comprising a driving circuit configured for outputting a first driving signal;
a plurality of light-emitting diodes on the substrate and connected to the driving circuit, each of the plurality of light-emitting diodes comprising a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode, the first electrode being connected to the driving circuit to receive the first driving signal;
a plurality of transparent electrodes electrically insulated from each other and connected to a side of the second electrode away from the light-emitting layer, an orthographic projection area of each of the plurality of transparent electrodes on the substrate being larger than an orthographic projection area of each of the plurality of second electrodes on the substrate; and
a plurality of wires connected to the plurality of transparent electrodes, each of the plurality of wires being configured to transmit a second driving signal, wherein each of the plurality of light-emitting diodes being configured to emit source light according to the first driving signal and the second driving signal;
wherein the display assembly is configured to modulate the source light to display images.
14 . The display device of claim 13 , wherein the plurality of light-emitting diodes are configured to emit the source light of a same color.
15 . The display device of claim 13 , wherein the orthographic projection of each of the plurality of transparent electrodes on the substrate completely covers the orthographic projection of each of the plurality of second electrodes on the substrate.
16 . The display device of claim 13 , further comprises a plurality of connection pad connecting between the second electrode and the transparent electrode; and
the orthographic projection area of each of the plurality of transparent electrodes on the substrate is larger than an orthographic projection area of each of the plurality of connection pads on the substrate.
17 . The display device of claim 16 , wherein the orthographic projection of each of the plurality of transparent electrodes on the substrate completely covers the orthographic projection of each of the plurality of connection pads on the substrate.
18 . The display device of claim 13 , wherein the plurality of wires connected to the driving circuit, and the driving circuit is configured to output the second driving signal.