Flexible Light Modulation Element Buffer Layer for Surface Waviness

The patent introduces a buffer layer as an intermediary component between the spacer and the base film. This buffer layer absorbs the mechanical stress and pressure differential caused by the spacer, preventing direct transmission of force to the base film surface. The buffer layer acts as a mediator that decouples the cell gap maintenance function from the surface flatness requirement, allowing both to be achieved simultaneously.

The patent changes the mechanical parameters of the system by introducing a layer with specific elastic modulus and thickness parameters. The buffer layer's parameters are optimized to provide sufficient compliance to absorb spacer-induced stress while maintaining overall structural integrity. By adjusting the buffer layer's thickness and material properties, the system transitions from a rigid structure causing surface waviness to a compliant structure maintaining surface flatness.

The buffer layer serves as a mediator between the flexible base film and the spacer structure. It accommodates the differential pressing forces that occur during manufacturing and use of flexible displays, preventing these forces from creating permanent surface waviness on the flexible base film while preserving the film's inherent flexibility for bending applications.

The buffer layer provides beforehand cushioning by being positioned between the spacer and the flexible base film before assembly is complete. This pre-positioned cushioning layer anticipates and absorbs the differential pressing forces that will occur during device operation, preventing surface waviness before it can form on the flexible base film.