Millimeter-wave Antenna-on-display (AoD) Design on the Encapsulation Layer of an OLED Display for 5G and B5G Smartphones

This paper proposes an advanced and leading millimeter-wave antenna-on-display (AoD) design on the encapsulation layer of an organic light-emitting diode (OLED) display for 5G and B5G smartphones to support 3GPP millimeter-wave band n261 (27.5–28.35GHz). The presented on-encapsulation-layer AoD design is compatible with the function of the OLED display’s touch sensor. Furthermore, in comparison with conventional AoD designs, due to the shorter distance between the metal-mesh-based millimeter-wave antennas and the OLED pixels, this proposed on-encapsulation-layer AoD design can greatly secure the visual/optical performance and nicely reduce the thicknesses and costs of display modules. Thus, the presented AoD design can elegantly and effectively enhance the product competitiveness.