US Patent 7408297 Light-emitting device, display device, and stress sensor

A stacked structure (1) includes an electrostriction layer (2) including an electric inductive distortion material and a stress light-emitting layer (3) including a stress light-emitting material. When applying a voltage to the electrostriction layer (2) in the stacked structure (1), the electric inductive distortion material deforms, thereby the electrostriction layer (2) deforms. The deformation of the electrostriction layer (2) causes an external force to act on the stress light-emitting material of the stress light-emitting layer (3), and the stress light-emitting layer (3) emits light, accordingly. That is, by applying the voltage to the stacked structure (1), the stacked structure (1) can emit the light.