OLED display device including a plurality of strip-shaped grooves and manufacturing method thereof
View Patent ↗An organic light-emitting diode (OLED) display device and a manufacturing method thereof are provided. The OLED display device includes a substrate, a thin-film transistor array substrate, a plurality of anodes, a pixel-defining layer, a plurality of strip-shaped grooves, a light-emitting functional layer, and a cathode disposed on the light-emitting functional layer, wherein the plurality of strip-shaped grooves block a lateral current between each of a plurality of pixel regions, thereby relieving a problem of current crosstalk between adjacent pixels.
1. An organic light-emitting diode (OLED) display device, comprising:
a substrate;
a thin-film transistor array substrate disposed on the substrate;
a plurality of anodes disposed on the thin-film transistor array substrate;
a pixel-defining layer disposed between the plurality of anodes on the thin-film transistor array substrate and separating the plurality of anodes, wherein a plurality of strip-shaped grooves are provided on the pixel-defining layer;
a light-emitting functional layer covering the plurality of anodes and the pixel-defining layer; and
a cathode disposed on the light-emitting functional layer;
wherein the light-emitting functional layer comprises a hole injection layer covering the plurality of anodes and the pixel-defining layer, and a thickness of the hole injection layer is less than a depth of the plurality of strip-shaped grooves;
wherein the plurality of strip-shaped grooves comprise at least two groove extending directions perpendicular to each other, and the grooves with different groove extending directions are not connected.
2. The OLED display device as claimed in claim 1 , wherein a width of each of the plurality of strip-shaped grooves ranges from 0.1μm to 30μm, and a depth of each of the plurality of strip-shaped grooves ranges from 10 nm to 200 nm.
3. The OLED display device as claimed in claim 1 , wherein the substrate is a rigid substrate or a flexible substrate, the rigid substrate is preferably a glass, and the flexible substrate is preferably a polyimide film.
4. The OLED display device as claimed in claim 1 , wherein a groove extending direction of each of the plurality of strip-shaped grooves is perpendicular to a direction of a connection line of two midpoints of the anodes adjacent to the strip-shaped grooves.
5. The OLED display device as claimed in claim 1 , wherein an included angle of a groove extending direction of each of the plurality of strip-shaped grooves and a direction of a connection line of two midpoints of the anodes adjacent to the strip-shaped grooves ranges from 60 to 90 degrees.
6. The OLED display device as claimed in claim 1 , wherein the strip-shaped grooves with different groove extending directions are staggered with each other.
7. The OLED display device as claimed in claim 1 , wherein the light-emitting functional layer further comprises a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer sequentially disposed on the hole injection layer.
8. A method of manufacturing an organic light-emitting diode (OLED) display device, comprising following steps:
providing a thin-film transistor array substrate, and forming a plurality of anodes distributed at intervals on the thin-film transistor array substrate;
forming a pixel-defining layer on the thin-film transistor array substrate, wherein the pixel-defining layer is disposed between the plurality of anodes and separates the plurality of anodes;
forming a plurality of strip-shaped grooves on the pixel-defining layer;
forming a light-emitting functional layer on the plurality of anodes and the pixel-defining layer; and
forming a cathode on the light-emitting functional layer;
wherein the light-emitting functional layer comprises a hole injection layer covering the plurality of anodes and the pixel-defining layer.
9. The method of manufacturing the OLED display device according to claim 8 , wherein a thickness of the hole injection layer is less than a depth of the plurality of strip-shaped grooves.
10. The method of manufacturing the OLED display device as claimed in claim 8 , wherein a width of each of the plurality of strip-shaped grooves ranges from 0.1 μm to 30 μm, and a depth of each of the plurality of strip-shaped grooves ranges from 10 nm to 200 nm.
11. The method of manufacturing the OLED display device as claimed in claim 8 , wherein the plurality of strip-shaped grooves comprise at least two groove extending directions perpendicular to each other, and the grooves with different groove extending directions are not connected.
12. The method of manufacturing the OLED display device as claimed in claim 8 , wherein a groove extending direction of each of the plurality of strip-shaped grooves is perpendicular to a direction of a connection line of two midpoints of the anodes adjacent to the strip-shaped grooves.
13. The method of manufacturing the OLED display device as claimed in claim 8 , wherein an included angle of a groove extending direction of each of the plurality of strip-shaped grooves and a direction of a connection line of two midpoints of the anodes adjacent to the strip-shaped grooves ranges from 60 to 90 degrees.
14. The method of manufacturing the OLED display device as claimed in claim 8 , wherein the plurality of strip-shaped grooves comprise at least two groove extending directions, and the strip-shaped grooves with different groove extending directions are staggered with each other.
15. An OLED display device, comprising:
a substrate
a thin-film transistor array substrate disposed on the substrate;
a plurality of anodes disposed on the thin-film transistor array substrate;
a pixel-defining layer disposed between the plurality of anodes on the thin-film transistor array substrate and separating the plurality of anodes, wherein the pixel-defining layer comprises a plurality of strip-shaped grooves;
a light-emitting functional layer covering the plurality of anodes and the pixel-defining layer; and
a cathode disposed on the light-emitting functional layer;
wherein the light-emitting functional layer comprises a hole injection layer covering the plurality of anodes and the pixel-defining layer, a thickness of the hole injection layer is less than a depth of the plurality of strip-shaped grooves, a width of each of the plurality of strip-shaped grooves ranges from 0.1μm to 30μm, a depth of each of the plurality of strip-shaped grooves ranges from 10 nm to 200 nm, and the light-emitting functional layer further comprises a hole transport layer, a light-emitting layer, and an electron transport and electron injection layer which are sequentially disposed on the hole injection layer.
16. The OLED display device as claimed in claim 15 , wherein the plurality of strip-shaped grooves comprise at least two groove extending directions perpendicular to each other, and the grooves with different groove extending directions are not connected.
17. The OLED display device as claimed in claim 15 , wherein a groove extending direction of each of the plurality of strip-shaped grooves is perpendicular to a direction of a connection line of two midpoints of the anodes adjacent to the strip-shaped grooves.
18. The OLED display device as claimed in claim 15 , wherein an included angle of a groove extending direction of each of the plurality of strip-shaped grooves and a direction of a connection line of two midpoints of the anodes adjacent to the strip-shaped groove ranges from 60 to 90 degrees.
19. The OLED device as claimed in claim 15 , wherein the plurality of strip-shaped grooves comprise at least two groove extending directions, and the strip-shaped grooves with different groove extending directions are staggered with each other.