| abstract |
The present application discloses an organic light emitting display panel, a display device and a manufacturing method thereof. The organic light emitting display substrate includes: a reflecting layer disposed on a substrate and a blocking layer disposed on the reflecting layer, where the blocking layer includes retaining walls configured to separate each pixel unit, and a transparent conducting layer, a first electrode, a light emitting layer and a second electrode which is semi-transparent and semi-reflective are arranged in sequence on a side, facing away from the substrate, of the reflecting layer within each pixel unit defined by retaining walls; in a direction vertical to the substrate, the thicknesses of the transparent conducting layers of pixel units with different emitting colors are different, such that the light emitted by each pixel unit is transmitted between the reflecting layer and the second electrode to satisfy the strong microcavity effect. |