An organic light-emitting diode (OLED) display, including: a base substrate, and OLED pixel units arranged on the base substrate in a matrix, each OLED pixel unit comprising: three OLED structures, a cathode layer, and a conducting layer, wherein each of the three OLED structures comprises: an anode layer, and an organic light emitting layer located between the cathode layer and the anode layer, each OLED pixel unit further comprises a pixel circuit (101, 201, 301) that is connected correspondingly with the OLED structure and configured to drive the OLED structure, the pixel circuit (101, 201, 301) comprises a switching unit and a capacitor (Cst1, Cst2, Cst3); wherein the three OLED structures in each OLED pixel structure are stacked one on top of another and insulated from each other and emit red, blue and green light respectively; characterised in that the capacitor (Cst1, Cst2, Cst3) is located above the layer in which the switching unit is located in each OLED structure and in that the conducting layer (011, 021, 031) is divided into three conducting layer sub-areas (011, 021, 031) which are respectively corresponding to the three OLED structures, and each of the conducting layer sub-areas (011, 021, 031) separately forms a capacitor (Cst1, Cst2, Cst3) together with the cathode layer at the topmost layer of the stack of the three OLED structures. a base substrate, and OLED pixel units arranged on the base substrate in a matrix, each OLED pixel unit comprising: three OLED structures, a cathode layer, and a conducting layer, wherein each of the three OLED structures comprises: an anode layer, and an organic light emitting layer located between the cathode layer and the anode layer, each OLED pixel unit further comprises a pixel circuit (101, 201, 301) that is connected correspondingly with the OLED structure and configured to drive the OLED structure, the pixel circuit (101, 201, 301) comprises a switching unit and a capacitor (Cst1, Cst2, Cst3); wherein the three OLED structures in each OLED pixel structure are stacked one on top of another and insulated from each other and emit red, blue and green light respectively; characterised in that the capacitor (Cst1, Cst2, Cst3) is located above the layer in which the switching unit is located in each OLED structure and in that the conducting layer (011, 021, 031) is divided into three conducting layer sub-areas (011, 021, 031) which are respectively corresponding to the three OLED structures, and each of the conducting layer sub-areas (011, 021, 031) separately forms a capacitor (Cst1, Cst2, Cst3) together with the cathode layer at the topmost layer of the stack of the three OLED structures. three OLED structures, a cathode layer, and a conducting layer, wherein each of the three OLED structures comprises: an anode layer, and an organic light emitting layer located between the cathode layer and the anode layer, each OLED pixel unit further comprises a pixel circuit (101, 201, 301) that is connected correspondingly with the OLED structure and configured to drive the OLED structure, the pixel circuit (101, 201, 301) comprises a switching unit and a capacitor (Cst1, Cst2, Cst3); wherein the three OLED structures in each OLED pixel structure are stacked one on top of another and insulated from each other and emit red, blue and green light respectively; characterised in that the capacitor (Cst1, Cst2, Cst3) is located above the layer in which the switching unit is located in each OLED structure and in that the conducting layer (011, 021, 031) is divided into three conducting layer sub-areas (011, 021, 031) which are respectively corresponding to the three OLED structures, and each of the conducting layer sub-areas (011, 021, 031) separately forms a capacitor (Cst1, Cst2, Cst3) together with the cathode layer at the topmost layer of the stack of the three OLED structures. an anode layer, and an organic light emitting layer located between the cathode layer and the anode layer, each OLED pixel unit further comprises a pixel circuit (101, 201, 301) that is connected correspondingly with the OLED structure and configured to drive the OLED structure, the pixel circuit (101, 201, 301) comprises a switching unit and a capacitor (Cst1, Cst2, Cst3); wherein the three OLED structures in each OLED pixel structure are stacked one on top of another and insulated from each other and emit red, blue and green light respectively; characterised in that the capacitor (Cst1, Cst2, Cst3) is located above the layer in which the switching unit is located in each OLED structure and in that the conducting layer (011, 021, 031) is divided into three conducting layer sub-areas (011, 021, 031) which are respectively corresponding to the three OLED structures, and each of the conducting layer sub-areas (011, 021, 031) separately forms a capacitor (Cst1, Cst2, Cst3) together with the cathode layer at the topmost layer of the stack of the three OLED structures.