Organic light emitting diode display panel and display device
The present invention provides an organic light emitting diode display panel and a display device, and relates to the field of display technology, which can solve the problem that the display contrast of an existing organic light emitting diode display panel and an existing display device is reduced due to the reflection of ambient light. In the organic light emitting diode display panel and the display device of the present invention, a light gathering unit and a light absorption layer matched with each other are arranged in pixel defining regions, so that the incident ambient light can be gathered by the light gathering unit to the light absorption layer and absorbed by the light absorption layer, to reduce ambient light outgoing from the display panel due to reflection, and increase the contrast of the display panel.
1. An organic light emitting diode display panel, comprising:
a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a plurality of pixel regions and pixel defining regions, each of which is located between two adjacent pixel regions; each of the pixel regions includes an anode, an organic light emitting functional layer and a cathode which are arranged on the first substrate, and each of the pixel defining regions is provided with a pixel defining layer therein;
a light absorption layer matched with a position of an end face of the pixel defining layer facing the second substrate, wherein the light absorption layer is used for absorbing irradiation light; and
a light gathering unit which is matched with the light absorption layer and only provided at a position corresponding to the end surface of the pixel defining layer facing the second substrate, used for gathering the light incident on the light gathering unit from outside and irradiating the gathered light to the light absorption layer, to allow the light absorption layer to absorb the gathered light and prevent from affecting display of the pixel regions.
2. The display panel according to claim 1 , wherein
the light gathering unit comprises at least one plane convex lens; each plane convex lens comprises a plane part for receiving incident light from outside and a protrusion part for gathering light; the protrusion part faces the light absorption layer; and the plane part is parallel to a plane where the light absorption layer is located.
3. The display panel according to claim 2 , wherein
the light gathering unit comprises a plurality of plane convex lenses, and the plane convex lenses are uniformly distributed in a region corresponding to a region where the light absorption layer is located.
4. The display panel according to claim 2 , wherein
the light absorption layer is arranged on a surface of the pixel defining layer facing the second substrate.
5. The display panel according to claim 3 , wherein
the light absorption layer is arranged on a surface of the pixel defining layer facing the second substrate.
6. The display panel according to claim 4 , wherein
the cathode covers the organic light emitting functional layer and the light absorption layer.
7. The display panel according to claim 6 , wherein
a buffer layer is further arranged on the cathode; and
the plane part is in contact with the second substrate, and the protrusion part is located in the buffer layer.
8. The display panel according to claim 2 , wherein
the cathode covers the organic light emitting functional layer and the end face of the pixel defining layer facing the second substrate.
9. The display panel according to claim 3 , wherein
the cathode covers the organic light emitting functional layer and the end face of the pixel defining layer facing the second substrate.
10. The display panel according to claim 8 , wherein
the light absorption layer is arranged on the cathode.
11. The display panel according to claim 10 , wherein
a buffer layer is further arranged on the cathode and the light absorption layer; and
the plane part is in contact with the second substrate, and the protrusion part is located in the buffer layer.
12. The display panel according to claim 7 , wherein
the refractive index of the material of the light gathering unit is larger than the refractive index of the material of the buffer layer.
13. The display panel according to claim 11 , wherein
the refractive index of the material of the light gathering unit is larger than the refractive index of the material of the buffer layer.
14. The display panel according to claim 12 , wherein
the refractive index of the material of the light gathering unit is within a range of 1.6-2.0, and the refractive index of the material of the buffer layer is within a range of 1.4-1.6.
15. The display panel according to claim 13 , wherein
the refractive index of the material of the light gathering unit is within a range of 1.6-2.0, and the refractive index of the material of the buffer layer is within a range of 1.4-1.6.
16. The display panel according to claim 2 , wherein
the diameter of the plane part is within a range of 1 μm-5 μm, and the height of the protrusion part is within a range of 5 μm-7 μm.
17. The display panel according to claim 3 , wherein
the diameter of the plane part is within a range of 1 μm-5 μm, and the height of the protrusion part is within a range of 5 μm-7 μm.
18. The display panel according to claim 1 , wherein
the light absorption layer is made of a black light absorbing material.
19. The display panel according to claim 18 , wherein
the black light absorbing material is any one of black epoxy resin, molybdenum oxide, carbon black and titanium suboxide.
20. An organic light emitting diode display device, comprising the display panel of claim 1 .