Double-sided display panel and method for manufacturing the same

1. A double-sided display panel comprising:

a first substrate;

a second substrate opposite to the first substrate;

a first display unit between the first substrate and the second substrate, the first display unit comprising a first luminescent layer, a first reflective layer, a transparent electrode between the first luminescent layer and the first reflective layer, and a conductive contact layer between the transparent electrode and the first reflective layer, wherein the first reflective layer is closer to the second substrate than the first luminescent layer, at least a part of light emitted from the first luminescent layer is reflected by the first reflective layer and then emitted out through the first substrate; and

a second display unit between the first substrate and the second substrate, the second display unit comprising a second luminescent layer, wherein light emitted from the second luminescent layer is emitted out through the second substrate,

wherein the conductive contact layer electrically connects the transparent electrode with the first reflective layer.

2. The double-sided display panel of claim 1 , wherein the double-sided display panel further comprises a black matrix on a side of the second substrate facing towards the first substrate;

wherein the transparent electrode, the conductive contact layer and the first reflective layer are sequentially disposed between the black matrix and the first luminescent layer in a direction from the first luminescent layer to the black matrix; and

wherein at least a portion of the conductive contact layer contacts the black matrix layer.

3. The double-sided display panel of claim 2 , wherein the conductive contact layer comprises a first side portion, a second side portion and a middle portion, the first side portion and the second side portion being located on two opposite sides of the conductive contact layer, respectively, the middle portion being between the first side portion and the second side portion;

wherein the first side portion and the second side portion both contact the black matrix, an orthographic projection of the first reflective layer on the second substrate falls within an orthographic projection of the middle portion on the second substrate, and the orthographic projection of the first reflective layer on the second substrate does not overlap with an orthographic projection of each of the first side portion and the second side portion on the second substrate; and

wherein a dimension of the middle portion in the direction from the first luminescent layer to the black matrix is less than a dimension of each of the first side portion and the second side portion in the direction from the first luminescent layer to the black matrix.

4. The double-sided display panel of claim 2 , wherein the first reflective layer contacts a surface of the black matrix facing towards the first substrate, and an orthographic projection of the first reflective layer on the second substrate falls within an orthographic projection of the conductive contact layer on the second substrate.

5. The double-sided display panel of claim 1 , wherein the double-sided display panel further comprises a black matrix on a side of the second substrate facing towards the first substrate;

wherein the first display unit further comprises a spacer layer;

wherein the transparent electrode, the conductive contact layer, the first reflective layer and the spacer layer are sequentially disposed between the black matrix and the first luminescent layer in a direction from the first luminescent layer to the black matrix; and

wherein at least a portion of the conductive contact layer contacts the black matrix.

6. The double-sided display panel of claim 5 , wherein the conductive contact layer comprises a first side portion, a second side portion and a middle portion, the first side portion and the second side portion being located on two opposite sides of the conductive contact layer, respectively, the middle portion being between the first side portion and the second side portion;

wherein the first side portion and the second side portion both contact the black matrix, and the middle portion contacts the first reflective layer or the spacer layer; and

wherein a dimension of the middle portion in the direction from the first luminescent layer to the black matrix is less than a dimension of each of the first side portion and the second side portion in the direction from the first luminescent layer to the black matrix.

7. The double-sided display panel of claim 5 , wherein the spacer layer contacts a surface of the black matrix facing towards the first substrate, and the first reflective layer is located on a surface of the spacer layer facing away from the black matrix.

8. The double-sided display panel of claim 7 , wherein an orthographic projection of the first reflective layer on the second substrate falls within an orthographic projection of the spacer layer on the second substrate.

9. The double-sided display panel of claim 8 , wherein the orthographic projection of each of the first reflective layer and the spacer layer on the second substrate falls within an orthographic projection of the conductive contact layer on the second substrate.

10. The double-sided display panel of claim 1 , wherein the double-sided display panel further comprises a black matrix on a side of the second substrate facing towards the first substrate, the black matrix comprises a light shielding region and an opening region, the first display unit is between the light shielding region of the black matrix and the first substrate, and the second display unit is between the opening region of the black matrix and the first substrate.

11. The double-sided display panel of claim 10 , wherein the second display unit further comprises a second color filter layer, and the second color filter layer is located in the opening region of the black matrix.

12. The double-sided display panel of claim 11 , wherein the second display unit further comprises a thin film encapsulation layer or a sealant layer between the second color filter layer and the second luminescent layer.

13. The double-sided display panel of claim 1 , wherein the second display unit further comprises an array circuit layer between the first substrate and the second luminescent layer, the array circuit layer being configured to control light emission of both the first display unit and the second display unit.

14. The double-sided display panel of claim 1 , wherein the first display unit further comprises a first color filter layer between the first luminescent layer and the first substrate; and/or the second display unit further comprises a second color filter layer between the second luminescent layer and the second substrate.

15. The double-sided display panel of claim 1 , wherein the first reflective layer is an auxiliary electrode metal layer made of a metal material.

16. The double-sided display panel of claim 15 , wherein the first reflective layer comprises a plurality of strips or a plurality of dots made of an opaque metal material; or the first reflective layer comprises a single layer made of an opaque metal material.

17. The double-sided display panel of claim 1 , wherein the second display unit further comprises a second reflective layer between the first substrate and the second luminescent layer.

18. A method for manufacturing a double-sided display panel comprising:

providing a first substrate and a second substrate which are opposite to each other;

forming a first luminescent layer and a second luminescent layer between the first substrate and the second substrate, and forming a transparent electrode on a side of the first luminescent layer facing away from the first substrate; and

forming a first reflective layer and a conductive contact layer between the first substrate and the second substrate,

wherein a first display unit and a second display unit are arranged between the first substrate and the second substrate;

wherein the first display unit comprises the first luminescent layer, the transparent electrode, the conductive contact layer and the first reflective layer, so that at least a part of light emitted from the first luminescent layer is reflected by the first reflective layer and then emitted out through the first substrate;

wherein the second display unit comprises the second luminescent layer, so that light emitted from the second luminescent layer is emitted out through the second substrate; and

wherein the conductive contact layer is between the transparent electrode and the first reflective layer so as to electrically connect the transparent electrode with the first reflective layer.

19. The method of claim 18 , wherein before the step of forming the first reflective layer and the conductive contact layer between the first substrate and the second substrate, the method further comprises: forming a black matrix on the second substrate; and

wherein the step of forming the first reflective layer and the conductive contact layer between the first substrate and the second substrate comprises:

forming the first reflective layer on the black matrix, the first reflective layer contacting a surface of the black matrix facing away from the second substrate; and

forming the conductive contact layer on a side of the first reflective layer facing away from the second substrate, the conductive contact layer covering the first reflective layer and at least a portion of the conductive contact layer contacting the black matrix.

20. The method of claim 18 , further comprising: forming a black matrix on the second substrate before the step of forming the first reflective layer and the conductive contact layer between the first substrate and the second substrate; and forming a spacer layer on the black matrix, the spacer layer contacting a surface of the black matrix facing away from the second substrate,

wherein the step of forming the first reflective layer and the conductive contact layer between the first substrate and the second substrate comprises:

forming the first reflective layer on a surface of the spacer layer facing away from the black matrix; and

forming the conductive contact layer on a side of the first reflective layer facing away from the second substrate, the conductive contact layer covering both the first reflective layer and the spacer layer and at least a portion of the conductive contact layer contacting the black matrix.