| 摘要 |
A light-emitting device comprising: a plurality of light-emitting chips each having a plurality of light-emitting elements, and each being designated, as a control target for lighting up or not lighting up, by two to Q designation signals (Q is an integer of two or more), where the number of the plurality of light-emitting chips is more than P but not more than P C Q (P is an integer of three or more where P > Q); an unlight signal generating part that supplies an unlight signal to change a potential applied to the light-emitting elements through a power supply line to another potential at which the light-emitting elements are unlighted, to at least a part of the plurality of light-emitting chips through an unlight signal line connected in common to at least the part of the plurality of light-emitting chips in order to light off each of the light-emitting elements being lighted up on receiving the power for lighting up supplied through the power supply line; and a selection signal generating part that selectively transmits P selection signals to the plurality of light-emitting chips through P selection signal lines, and designates each of the plurality of light-emitting chips as the control target by the designation signals for each of the light-emitting chips, the designation signals each including a combination of two to Q selection signals taken from the P selection signals, the combinations all being different from each other. |
