Display device including self-aligned LEDs and method for manufacturing display device
A display device includes a substrate including a plurality of sub-pixels, a plurality of thin film transistors disposed on the substrate, a planarization layer disposed on the plurality of thin film transistors, a plurality of first electrodes disposed on the planarization layer and electrically connected to the plurality of thin film transistors, a plurality of second electrodes disposed on the planarization layer and spaced apart from the plurality of first electrodes, a bank covering a part of each of the plurality of first electrodes and the plurality of second electrodes and disposed to define an emission area, a plurality of LEDs disposed in the emission area and electrically connected to the plurality of first electrodes and the plurality of second electrodes and a plurality of first conductive patterns disposed on the bank. Therefore, self-alignment of the LEDs can be easily achieved.
1 . A display device, comprising:
a substrate including a plurality of sub-pixels;
a plurality of thin film transistors disposed on the substrate;
a planarization layer disposed on the plurality of thin film transistors;
a plurality of first electrodes disposed on the planarization layer and electrically connected to the plurality of thin film transistors;
a plurality of second electrodes disposed on the planarization layer and spaced apart from the plurality of first electrodes;
a bank covering a part of each of the plurality of first electrodes and the plurality of second electrodes and disposed to define an emission area;
a plurality of LEDs disposed in the emission area and electrically connected to the plurality of first electrodes and the plurality of second electrodes; and
a plurality of first conductive patterns disposed on the bank,
wherein the plurality of first conductive patterns are electrically insulated from the plurality of LEDs.
2 . The display device according to claim 1 , wherein the plurality of first conductive patterns are disposed on the bank so as to be extended in a first direction.
3 . The display device according to claim 2 , further comprising:
an insulating layer disposed on the bank, the plurality of first conductive patterns and the plurality of LEDs; and
a plurality of second conductive patterns disposed on the insulating layer in a second direction so as to intersect with the plurality of first conductive patterns.
4 . The display device according to claim 3 , further comprising:
a touch sensing part in which the plurality of first conductive patterns and the plurality of second conductive patterns are used as touch electrodes.
5 . The display device according to claim 4 , wherein the touch sensing part further includes:
a plurality of first routing lines electrically connected to one ends of the plurality of first conductive patterns; and
a plurality of second routing lines electrically connected to one ends of the plurality of second conductive patterns.
6 . The display device according to claim 1 , wherein each of the plurality of LEDs is a light emitting nanorod.
7 . A manufacturing method of a display device, comprising:
a process of preparing a substrate including a plurality of thin film transistors disposed in a plurality of sub-pixels, respectively;
a process of forming a planarization layer on the plurality of thin film transistors;
a process of preparing a plurality of first electrodes and a plurality of second electrodes spaced apart from each other on the planarization layer;
a process of preparing a bank covering a part of each of the plurality of first electrodes and the plurality of second electrodes and disposed to define an emission area;
a process of preparing a plurality of first conductive patterns on the bank; and
a process of facilitating self-alignment of a plurality of LEDs by applying a voltage to the plurality of first conductive patterns,
wherein the plurality of first conductive patterns are electrically insulated from the plurality of LEDs.
8 . The manufacturing method of a display device according to claim 7 , wherein the process of facilitating self-alignment of the plurality of LEDs includes a process of supplying a solvent and the plurality of LEDs into a space defined by the bank.
9 . The manufacturing method of a display device according to claim 8 , wherein the process of facilitating self-alignment of the plurality of LEDs further includes a process of respectively applying different voltages to odd-numbered first conductive patterns and even-numbered first conductive patterns of the plurality of first conductive patterns.
10 . The manufacturing method of a display device according to claim 9 , wherein the process of facilitating self-alignment of the plurality of LEDs further includes a process of connecting the plurality of LEDs to the plurality of first electrodes and the plurality of second electrodes by drying the solvent in a state where the voltages are applied.
11 . The manufacturing method of a display device according to claim 7 , further comprising:
a process of preparing a touch sensing part,
wherein the process of preparing the touch sensing part includes:
a process of preparing an insulating layer on the bank, the plurality of first conductive patterns and the plurality of LEDs; and
a process of preparing a plurality of second conductive patterns on the insulating layer so as to intersect with the plurality of first conductive patterns, and
wherein the touch sensing part includes the plurality of first conductive patterns and the plurality of second conductive patterns.