A display includes a display substrate having an active display area including a plurality of first display subpixels. A transceiver circuit is arranged to drive the display in a first mode of operation or in a second mode of operation. The first display subpixels include micro light-emitting diodes and/or resonant-cavity light emitting devices. In the first mode of operation, the transceiver circuit provides a forward bias to the first display subpixels, such that the first display subpixels are operable to emit light. In the second mode of operation, the transceiver circuit provides a reverse bias to the first display subpixels, such that the first display subpixels are operable to detect light.