An OLED panel, comprising a plurality of sub-pixels arranged in an array and configured to display an image and a plurality of light emitting units configured to serve as a light source for optical fingerprint identification, wherein the OLED panel is further provided with an optical fingerprint identification area, the optical fingerprint identification area comprises at least part of the sub-pixels and at least part of the light source, and at least one of the light emitting units is located between adjacent sub-pixels of the sub-pixels, wherein the light emitting unit comprises a first microcavity structure, and the first microcavity structure comprises: a first electrode; a second electrode; and a first light emitting layer between the first electrode and the second electrode, wherein the sub-pixel comprises a second microcavity structure, and the second microcavity structure comprises: a third electrode; a fourth electrode; and a second light emitting layer between the third electrode and the fourth electrode, wherein the first electrode and the third electrode are transflective electrodes, and the second electrode and the fourth electrode are reflective electrodes, wherein a thickness of the first electrode is greater than a thickness of the third electrode, and a thickness of the first microcavity structure is greater than a thickness of the second microcavity structure. wherein the OLED panel is further provided with an optical fingerprint identification area, the optical fingerprint identification area comprises at least part of the sub-pixels and at least part of the light source, and at least one of the light emitting units is located between adjacent sub-pixels of the sub-pixels, wherein the light emitting unit comprises a first microcavity structure, and the first microcavity structure comprises: a first electrode; a second electrode; and a first light emitting layer between the first electrode and the second electrode, wherein the sub-pixel comprises a second microcavity structure, and the second microcavity structure comprises: a third electrode; a fourth electrode; and a second light emitting layer between the third electrode and the fourth electrode, wherein the first electrode and the third electrode are transflective electrodes, and the second electrode and the fourth electrode are reflective electrodes, wherein a thickness of the first electrode is greater than a thickness of the third electrode, and a thickness of the first microcavity structure is greater than a thickness of the second microcavity structure. a first electrode; a second electrode; and a first light emitting layer between the first electrode and the second electrode, wherein the sub-pixel comprises a second microcavity structure, and the second microcavity structure comprises: a third electrode; a fourth electrode; and a second light emitting layer between the third electrode and the fourth electrode, wherein the first electrode and the third electrode are transflective electrodes, and the second electrode and the fourth electrode are reflective electrodes, wherein a thickness of the first electrode is greater than a thickness of the third electrode, and a thickness of the first microcavity structure is greater than a thickness of the second microcavity structure. a third electrode; a fourth electrode; and a second light emitting layer between the third electrode and the fourth electrode, wherein the first electrode and the third electrode are transflective electrodes, and the second electrode and the fourth electrode are reflective electrodes, wherein a thickness of the first electrode is greater than a thickness of the third electrode, and a thickness of the first microcavity structure is greater than a thickness of the second microcavity structure.