LED-backed housing split of a portable electronic device

This application relates to a wearable electronic device including a housing having an illumination region, where the housing can carry components that can include a processor capable of receiving an input signal and responding to the input signal by providing an illumination signal. The components can further include independently-controllable light-emitting units carried by the housing at the illumination region and in communication with the processor, the light-emitting units capable of (i) receiving the illumination signal from the processor, and (ii) presenting the notification by emitting an amount of light in accordance with the illumination signal.