OLED 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, a plurality of sub-pixel regions defined in the pixel defining layer, an organic light-emitting material disposed in each of the sub-pixel regions, wherein a plurality of non-pixel regions are defined in the pixel defining layer, and each of the non-pixel regions is located between two adjacent sub-pixel regions;

a light-transmissive hole defined in the pixel defining layer, the light-transmissive hole penetrating the pixel defining layer;

a blocking wall disposed in the non-pixel regions and located spaced apart from the light-transmissive hole by multiple ones of the sub-pixel regions, the blocking wall made of polystyrene;

a cathode electrode covering the blocking wall and the pixel defining layer; and

a thin-film encapsulation layer disposed on the cathode electrode.

2. The OLED display panel according to claim 1 , wherein the blocking wall is a ring-shaped inverted trapezoidal structure.

3. The OLED display panel according to claim 2 , wherein a height of the blocking wall ranges from 1 to 10 um.

4. The OLED display panel according to claim 1 , wherein the light-transmissive hole is filled with a high light-transmissive material.

5. The OLED display panel according to claim 4 , wherein the high light-transmissive material is filled to a height level aligned with a top of the blocking wall.

6. The OLED display panel according to claim 4 , wherein the light-transmissive hole has a diamond-shaped cross-section.

7. The OLED display panel according to claim 1 , wherein the thin-film encapsulation layer comprises a first inorganic layer, a first organic layer, and a second inorganic layer sequentially disposed on the cathode electrode.

8. The OLED display panel according to claim 7 , wherein a refractive index of the first inorganic layer is greater than a refractive index of the first organic layer.

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

a substrate;

a pixel defining layer disposed on the substrate, a plurality of sub-pixel regions defined in the pixel defining layer, an organic light-emitting material disposed in each of the sub-pixel regions, wherein a plurality of non-pixel regions are defined in the pixel defining layer, and each of the non-pixel regions is located between two adjacent sub-pixel regions;

a light-transmissive hole defined in the pixel defining layer, the light-transmissive hole penetrating the pixel defining layer;

a blocking wall disposed in the non-pixel regions and located spaced apart from the light-transmissive hole by multiple ones of the sub-pixel regions;

a cathode electrode covering the blocking wall and the pixel defining layer; and

a thin-film encapsulation layer disposed on the cathode electrode.

10. The OLED display panel according to claim 9 , wherein the blocking wall is a ring-shaped inverted trapezoidal structure.

11. The OLED display panel according to claim 10 , wherein a height of the blocking wall ranges from 1 to 10 um.

12. The OLED display panel according to claim 9 , wherein an inner side of the blocking wall is coated with a material of the cathode electrode.

13. The OLED display panel according to claim 9 , wherein the light-transmissive hole is filled with a high light-transmissive material.

14. The OLED display panel according to claim 13 , the high light-transmissive material is filled to a height level aligned with a top of the blocking wall.

15. The OLED display panel according to claim 13 , wherein the light-transmissive hole has a diamond-shaped cross-section.

16. The OLED display panel according to claim 9 , wherein the thin-film encapsulation layer comprises a first inorganic layer, a first organic layer, and a second inorganic layer sequentially disposed on the cathode electrode.

17. The OLED display panel according to claim 16 , wherein a refractive index of the first inorganic layer is greater than a refractive index of the first organic layer.

18. A manufacturing method of an organic light emitting diode (OLED) display panel, comprising steps as follows:

S 10 : providing a substrate;

S 20 : forming a pixel defining layer on the substrate, wherein a plurality of sub-pixel regions are defined in the pixel defining layer, and a plurality of non-pixel regions are defined in the pixel defining layer, and each of the non-pixel regions is located between two adjacent sub-pixel regions;

S 30 : forming a light-transmissive hole in the pixel defining layer, wherein the light-transmissive hole penetrates the pixel defining layer;

S 40 : forming a blocking wall in the non-pixel regions, wherein the blocking wall is located spaced apart from the light-transmissive hole by multiple ones of the sub-pixel regions;

S 50 : filling the sub-pixel regions with an organic light-emitting material;

S 60 : forming a cathode electrode on the blocking wall and the pixel defining layer;

S 70 : filling the light-transmissive hole with a high light-transmissive material; and

S 80 : forming a thin film encapsulation layer on the cathode electrode.

19. The manufacturing method of the OLED display panel according to claim 18 , wherein the thin-film encapsulation layer comprises a first inorganic layer, a first organic layer, and a second inorganic layer sequentially disposed on the cathode electrode, and a refractive index of the first inorganic layer is greater than a refractive index of the first organic layer.

20. The manufacturing method of the OLED display panel according to claim 18 , wherein the high light-transmissive material is filled into the light transmissive hole by ink-jet printing.