Organic light-emitting diode display panel and manufacturing method thereof

1. An organic light-emitting diode (OLED) display panel, comprising:

a substrate;

a pixel defining layer disposed on the substrate, wherein the pixel defining layer comprises a plurality of recessed regions and a plurality of grooves, wherein the recessed regions communicate with each other through the grooves, the recessed regions and the grooves form a mesh structure, the mesh structure defines a plurality of pixel regions, and widths of the recessed regions is greater than widths of the grooves, a depth of the grooves from the substrate is lower than a depth of the recessed regions from the substrate, such that a height difference between a bottom of the recessed regions and a bottom of the grooves is formed;

an organic light-emitting layer disposed on the pixel defining layer, wherein the organic light-emitting layer defines the grooves; and

an organic encapsulation layer disposed on the organic light-emitting layer;

wherein the widths and the depths of the grooves are configured, such that a plurality of organic encapsulation droplets are spread via capillary force, and the organic encapsulation droplets are used for manufacturing the organic encapsulation layer.

2. The OLED display panel of claim 1 , wherein the widths of the grooves are greater than 1 μm, and the depths of the grooves range from 0.01 μm to 1.5 μm.

3. The OLED display panel of claim 1 , wherein a thickness of the organic encapsulation layer ranges 0.01 μm to 10 μm.

4. The OLED display panel of claim 1 , wherein the OLED display panel further comprises an anode layer disposed at bottoms of the recessed regions.

5. The OLED display panel of claim 4 , wherein the OLED display panel further comprises an array layer disposed on the substrate, wherein the pixel defining layer is disposed on the array layer, the array layer comprises a drain electrode, and the drain electrode is disposed to correspond to the anode layer and connects the anode layer.

6. The OLED display panel of claim 5 , wherein the array layer further comprises a first dielectric layer, a second dielectric layer, and a planarization layer, which are disposed on the substrate in sequence, the first dielectric layer comprises a source and a drain, the second dielectric layer comprises a gate, and the drain electrode is disposed between the planarization layer and the second dielectric layer.

7. A manufacturing method of an organic light-emitting diode (OLED) display panel, comprising steps of:

forming a pixel defining layer;

performing a patterning process on the pixel defining layer to form a plurality of recessed regions and a plurality of grooves, wherein the recessed regions communicate with each other through the grooves, the recessed regions and the grooves form a mesh structure, and the mesh structure defines a plurality of the pixel regions, a depth of the grooves from the substrate is lower than a depth of the recessed regions from the substrate, such that a height difference between a bottom of the recessed regions and a bottom of the grooves is formed;

evaporating an organic light-emitting layer on the pixel defining layer, wherein the organic light-emitting layer defines the grooves; and

adding a plurality of organic encapsulation droplets on the organic light-emitting layer, wherein the organic encapsulation droplets are spread via capillary force to form an organic encapsulation layer.

8. An organic light-emitting diode (OLED) display panel, comprising:

a substrate;

a pixel defining layer disposed on the substrate, wherein the pixel defining layer comprises a plurality of recessed regions and a plurality of grooves, the recessed regions communicate with each other through the grooves, the recessed regions and the grooves form a mesh structure, and the mesh structure defines the pixel regions, a depth of the grooves from the substrate is lower than a depth of the recessed regions from the substrate, such that a height difference between a bottom of the recessed regions and a bottom of the grooves is formed;

an organic light-emitting layer disposed on the pixel defining layer an organic light-emitting layer disposed on the pixel defining layer, wherein the organic light-emitting layer defines the grooves; and

an organic encapsulation layer disposed on the organic light-emitting layer.

9. The OLED display panel of claim 8 , wherein the widths of the grooves are greater than 1 μm and the depths of the grooves range from 0.01 μm to 1.5 μm.

10. The OLED display panel of claim 8 , wherein a thickness of the organic encapsulation layer ranges 0.01 μm to 10 μm.

11. The OLED display panel of claim 8 , wherein the OLED display panel further comprises an anode layer disposed at bottoms of the recessed regions.

12. The OLED display panel of claim 11 , wherein the OLED display panel further comprises an array layer disposed on the substrate, wherein the pixel defining layer is disposed on the array layer, the array layer comprises a drain electrode, and the drain electrode is disposed to correspond to the anode layer and connects to the anode layer.

13. The OLED display panel of claim 12 , wherein the array layer further comprises: a first dielectric layer, a second dielectric layer, and a planarization layer which are disposed on the substrate in sequence, the first dielectric layer comprises a source and a drain, the second dielectric layer comprises a gate, and the drain electrode is disposed between the planarization layer and the second dielectric layer.