LIGHT EMITTING DEVICE, CONTROL METHOD FOR LIGHT EMITTING DEVICE, AND MEDIUM

A light emitting device is located inside a vehicle and emits light toward an occupant compartment where an occupant is seated. The light emitting device comprises a light emitting unit and a control unit. The light emitting unit has a plurality of light emission regions. The plurality of light emission regions are arranged along one direction. The control unit controls the light emission region using at least one of first information related to an operation of the vehicle in which the light emitting device is mounted and second information related to an operation of an output unit that performs output toward the occupant compartment of the vehicle.