Patent ID: 8450671

Claim:
A light-emitting device comprising: a light-emitting element array formed of a plurality of light-emitting elements that are arrayed in line and that are connected to a light-up signal line to supply a current for lighting up; a memory element array formed of a plurality of memory elements that are provided so as to correspond to the respective light-emitting elements forming the light-emitting element array, that are connected through respective resistances to a memory signal line to supply a signal to designate a light-emitting element to be caused to light up, that each have an ON state and an OFF state, and that each memorize that a corresponding one of the light-emitting elements is to be caused to light up when changed into the ON state; and a switch element array formed of a plurality of switch elements that are provided so as to correspond to the respective memory elements forming the memory element array, that are electrically connected to the respective memory elements, that each have an ON state and an OFF state, that are connected to a transfer signal line to supply signals to set so as to allow a sequential shift of the ON state from one end side to the other end side, and that cause the respective memory elements to be able to be set in the ON state by changing into the ON state.