Patent ID: 11921929
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  F  H | IPC F  G  H

Claim 14:
15. An operating method of a stereoscopic surface display device including a stereoscopic display unit having a cell area,
wherein the stereoscopic display unit comprises:
a flexible layer;
an optical waveguide and an optical output unit that are in the flexible layer, the optical output unit being disposed in the cell area;
a light source disposed on a side of the stereoscopic display unit, the optical waveguide connecting the light source and the optical output unit;
a photothermal response layer on the flexible layer; and
a shape deformation layer on the photothermal response layer,
wherein the operating method comprises:
irradiating incident light from the light source to the optical waveguide, the optical waveguide guiding the incident light to the optical output unit;
emitting output light from the optical output unit to the photothermal response layer, the photothermal response layer receiving the output light and generating thermal energy;
heating the shape deformation layer using the thermal energy, the shape deformation layer being heated so that a modulus of elasticity in the shape deformation layer decreases and a coefficient of thermal expansion in the shape deformation layer increases; and
generating bending deformation in the shape deformation layer through a difference between the increased coefficient of thermal expansion of the shape deformation layer and a coefficient of thermal expansion of the photothermal response layer.