| 摘要 |
A light emitting device according to the present invention comprises: a light emitting element including a semiconductor layer, a first electrode, a dielectric layer sandwiched between the semiconductor layer and the first electrode, and a light emitter; and a power supply circuit for applying a voltage between the semiconductor layer and the first electrode, wherein the light emitter is formed in at least one region of regions in the semiconductor layer, in the dielectric layer, between the semiconductor layer and the dielectric layer, and between the first electrode and the dielectric layer, the light emitting element emits light in one of first and second cases, but does not substantially emit light in the other case, the first case using a current applied to the dielectric layer under a condition that the semiconductor layer serves as a positive electrode and the first electrode serves as a negative electrode, the second case using a current applied to the dielectric layer under a condition that the semiconductor layer serves as the negative electrode and the first electrode serves as the positive electrode, and the power supply circuit is electrically connected to each of the semiconductor layer and the first electrode so that a unidirectional current flows in the dielectric layer while the light emitting element emits the light.
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