Light Diffusion Control Film with UV Absorbing Layer

The patent applies preliminary action by incorporating ultraviolet absorbers and hindered amine light stabilizers into the light diffusion control film formulation before degradation occurs. These additives proactively absorb UV radiation and prevent photolytic degradation mechanisms, thereby suppressing liquefaction and yellowing before they can manifest as functional failures during extended service under external light irradiation.

The patent employs composite materials by combining the light diffusion control film with ultraviolet absorbing layers and incorporating hindered amine light stabilizers within the film matrix. This composite approach creates a multi-functional system where the ultraviolet absorbers block harmful radiation, the hindered amine stabilizers prevent oxidative degradation, and the light diffusion structure maintains optical functionality, collectively enhancing long-term stability against liquefaction and yellowing.

The patent applies merging by integrating the ultraviolet absorbing function and light diffusion function into a single integrated film structure. The ultraviolet absorbers and hindered amine light stabilizers are incorporated within the light diffusion control film matrix itself, allowing both UV protection and light diffusion functions to coexist in one layer rather than requiring separate components, thereby reducing structural complexity while maintaining yellowing resistance.

The patent implements multi-functionality by designing the light diffusion control film to simultaneously perform light diffusion, ultraviolet absorption, and photostabilization functions. The film structure serves multiple purposes: it diffuses incident light for privacy protection, absorbs UV radiation to prevent degradation, and contains hindered amine stabilizers to resist yellowing and liquefaction, eliminating the need for separate specialized layers and simplifying the overall device structure.