Flexible display panel and preparation method thereof

1. A flexible display panel, comprising a plurality of pixel units, wherein each of the pixel units comprises a plurality of sub-pixels having at least three emitting colors;

the sub-pixels with a same emitting color are arranged along a predetermined stretching direction;

a pixel limiting layer disposed between the sub-pixels with different emitting colors, and the pixel limiting layer has a stretchable property to reduce a stretching between the sub-pixels with different emitting colors; and

the flexible display panel is stretched in three different predetermined stretching directions, the flexible display panel comprises three different kinds of sub-pixels with three different emitting colors, and the three different kinds of sub-pixels are arranged along the three different predetermined stretching directions respectively.

2. The flexible display panel according to claim 1 , wherein a shape of each of the pixel units is a regular hexagon composed of six regular triangles, each of the regular triangles constitutes one of the sub-pixels, and two of the sub-pixels located on opposite sides of the regular hexagon have a same emitting color.

3. The flexible display panel according to claim 2 , wherein two of the sub-pixels of any adjacent sides in the regular hexagon have different emitting colors.

4. The flexible display panel according to claim 2 , wherein two adjacent sub-pixels of two adjacent pixel units have the same emitting color.

5. The flexible display panel according to claim 4 , wherein the two adjacent sub-pixels of the two adjacent pixel units are disposed with a common side.

6. The flexible display panel according to claim 2 , wherein six corners of the regular hexagon are rounded.

7. The flexible display panel according to claim 2 , wherein three corners of the regular triangle are rounded.

8. The flexible display panel according to claim 2 , wherein two adjacent sub-pixels arranged along the same predetermined stretching direction are symmetrical.

9. The flexible display panel according to claim 1 , wherein each of the pixel units comprises a plurality of sub-pixels with three emitting colors of red, blue, and green.

10. The flexible display panel according to claim 1 , wherein the pixel limiting layer is made of a transparent organic material.

11. The flexible display panel according to claim 10 , wherein the transparent organic material is a macromolecular organosilicon compound.

12. The flexible display panel according to claim 10 , wherein a material of the pixel limiting layer is polydimethylsiloxane.

13. The flexible display panel according to claim 1 , wherein the pixel limiting layer has an optical transparency property to ensure the pixel limiting layer does not affect a display effect of the flexible display panel.

14. The flexible display panel according to claim 1 , wherein the flexible display panel is a stretchable flexible display panel.

15. A preparation method of a flexible display panel, comprising:

providing a substrate;

evaporating a plurality of pixel units on the substrate, each of the pixel units comprises a plurality of sub-pixels having at least three emitting colors, the plurality of the sub-pixels are evaporated simultaneously in a predetermined stretching direction; and

preparing a pixel limiting layer, wherein the pixel limiting layer is disposed between the sub-pixels with different emitting colors, the pixel limiting layer has a stretchable property to reduce a stretching between the sub-pixels with different emitting colors; and

the flexible display panel is stretched in three different predetermined stretching directions, the flexible display panel comprises three different kinds of sub-pixels with three different emitting colors, and the three different kinds of sub-pixels are arranged along the three different predetermined stretching directions respectively.

16. The preparation method according to claim 15 , wherein the pixel limiting layer has an optical transparency property to ensure the pixel limiting layer does not affect a display effect of the flexible display panel.

17. A preparation method of a flexible display panel, comprising:

providing a substrate; and

evaporating a plurality of pixel units on the substrate, each of the pixel units comprises a plurality of sub-pixels having at least three emitting colors, the plurality of the sub-pixels are evaporated simultaneously in a predetermined stretching direction,

wherein a shape of each of the pixel units is a regular hexagon composed of six regular triangles, each of the regular triangles constitutes one of the sub-pixels, and each of the pixel units comprises first sub-pixels located on two first opposite sides of the regular hexagon, second sub-pixels located on two second opposite sides of the regular hexagon, and third sub-pixels located on two third opposite sides of the regular hexagon; and

the plurality of the sub-pixels are evaporated simultaneously in a predetermined stretching direction comprises:

evaporating the first sub-pixels simultaneously along a first predetermined stretching direction, evaporating the second sub-pixels simultaneously along a second predetermined stretching direction, and evaporating the third sub-pixels simultaneously along a third predetermined stretching direction; and

the first predetermined stretching direction is perpendicular to the first opposite sides, the second predetermined stretching direction is perpendicular to the second opposite sides, and the third predetermined stretching direction is perpendicular to the third opposite sides.