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1. US20180331325 - OLED DISPLAY PANEL, MANUFACTURING METHOD THEREOF, AND DISPLAY DEVICE

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[ EN ]

Claims

1. An OLED display panel, comprising:
a basal substrate;
a first pixel definition layer disposed on the basal substrate and provided with a plurality of openings arranged in an array; and
a plurality of OLEDs corresponding to the plurality of openings one by one, wherein each OLED comprises:
a first electrode arranged on a bottom and a sidewall of the corresponding opening and configured to reflect light emitted by the OLED; and
a light emitting layer and a second electrode which are sequentially arranged on the first electrode.
2. The OLED display panel of claim 1, wherein an area of a cross section of the opening is positively correlated with a distance between the cross section and the basal substrate, and the cross section of the opening refers to the cross section of the opening in a direction parallel to the basal substrate.
3. The OLED display panel of claim 2, wherein the first electrode comprises a first reflective part, a second reflective part and a third reflective part which are sequentially connected; the first reflective part is arranged on the bottom of the opening, both the second reflective part and the third reflective part are arranged on the sidewall of the opening, the second reflective part is arranged around the first reflective part, the third reflective part is arranged around the second reflective part, and both an included angle between the second reflective part and the first reflective part and an included angle between the third reflective part and the second reflective part are obtuse angles.
4. The OLED display panel of claim 3, wherein a vertical distance from a joint between the second reflective part and the third reflective part to the basal substrate is greater than a vertical distance from the light emitting layer to the basal substrate.
5. The OLED display panel of claim 3, wherein the included angle between the third reflective part and the second reflective part is 120°-140°, and the included angle between the second reflective part and the first reflective part is 160°-170°.
6. The OLED display panel of claim 3, wherein the sidewall of the opening is a concave spherical cap surface.
7. The OLED display panel of claim 6, wherein the light emitting layer of the OLED is arranged at a focal point of the spherical cap surface.
8. The OLED display panel of claim 1, further comprising: a second pixel definition layer covering the first pixel definition layer and regions of the first electrodes outside the light emitting layers.
9. The OLED display panel of claim 8, wherein the second electrodes of the plurality of OLEDs are of an integral structure which is a surface electrode.
10. The OLED display panel of claim 9, wherein the first electrode further covers a surface of the first pixel definition layer around the opening.
11. The OLED display panel of claim 1, wherein a thickness of the first electrode is 0.4 μm-0.6 μm.
12. The OLED display panel of claim 1, wherein a thickness of the second electrode is 80 Å-100 Å.
13. The OLED display panel of claim 1, wherein the first electrode is an anode and the second electrode is a cathode.
14. The OLED display panel of claim 13, wherein the first electrode is formed by sequentially laminating an ITO layer, an Ag layer and another ITO layer.
15. The OLED display panel of claim 13, wherein the second electrode is formed by sequentially laminating an Mg layer and an Ag layer.
16. A method for manufacturing an OLED display panel, comprising:
forming a first pixel definition layer on a basal substrate, wherein the first pixel definition layer is provided with a plurality of openings arranged in an array;
forming a first electrode of an OLED in each opening of the first pixel definition layer;
forming a light emitting layer on the first electrode; and
forming a second electrode on the light emitting layer, wherein each first electrode at least covers a bottom and a sidewall of a corresponding opening, and is configured to reflect light emitted by the OLED.
17. The method for manufacturing an OLED display panel of claim 16, wherein before the light emitting layer is formed on the first electrode, the method further comprises:
forming a second pixel definition layer on the first electrodes and the first pixel definition layer.
18. The method for manufacturing an OLED display panel of claim 16, wherein forming the first pixel definition layer on the basal substrate comprises:
forming a first pixel definition layer thin film on the basal substrate; and
forming the plurality of openings arranged in an array in the first pixel definition layer thin film, and an area of a cross section of the opening is positively correlated with a distance between the cross section and the basal substrate, wherein the cross section of the opening refers to the cross section of the opening in a direction parallel to the basal substrate.
19. An OLED display device, comprising: an OLED display panel comprising a basal substrate as well as a first pixel definition layer and a plurality of OLEDs which are arranged on the basal substrate, wherein the first pixel definition layer is provided with a plurality of openings arranged in an array, each opening is correspondingly provided with one OLED, each OLED comprises a first electrode, a light emitting layer and a second electrode, each first electrode is arranged on a bottom and a sidewall of the corresponding opening, the light emitting layer and the second electrode are sequentially arranged on the first electrode, and the first electrode is configured to reflect light emitted by the OLED.
20. The OLED display device of claim 19, wherein the OLED display panel further comprises a second pixel definition layer covering the first pixel definition layer and regions of the first electrodes outside the light emitting layers.