Patent ID: 8390766

Claim:
A light-regulation membrane comprising: a polymer dispersed liquid crystal film, a surface structure formed on one side of said polymer dispersed liquid crystal film and an adhesion layer formed on an opposite side of said polymer dispersed liquid crystal film, wherein: said polymer dispersed liquid crystal film comprises two conducting layers electrically connected to an external power source and a liquid crystal layer sandwiched between said two conducting layers, said conducting layers are prepared by high-reflection black and transparent materials made by means of depositing titanium oxide on a base layer of polyethylene terephthalate by means of spattering deposition; said surface structure comprises a hard coating layer and an anti-stain layer, said hard coating layer being sandwiched between said polymer dispersed liquid crystal film and said anti-stain layer, said hard coating layer comprising a light diffusing unit formed of nano grade light diffusing particles of crosslinking copolymer acrylates and ultraviolet absorbent mixture; said adhesion layer is formed the opposite side of said polymer dispersed liquid crystal film opposite to said surface structure and releasably adhered to a transparent object; when said external power source is switched off, the liquid crystal layer of said polymer dispersed liquid crystal film is off, said light-regulation membrane is changed to a frosted reflective status for enabling the nano grade light diffusing particles of said light diffusing unit to diffuse incident light from an external image projection apparatus and the liquid crystal layer of said polymer dispersed liquid crystal film to reflect the diffused light toward the outside; when said external power source is switched on, said liquid crystal layer is changed to a transparent status, and incident light from an external image projection apparatus is primarily diffused by said nano grade light diffusing particles of said light diffusing unit and light images are temporarily retained at the crystal molecules and reflected by the high-reflection black and transparent materials of said conducting layers to provide a suspension image projection effect.