Flexible printed circuits (FPCs) are revolutionizing smart home technology, particularly in the development of foldable displays used in smart mirrors, interactive kitchen panels, and collapsible control interfaces. These displays require seamless electrical connectivity across moving parts, and FPCs deliver this with their unique combination of flexibility, thinness, and high conductivity.

　　In foldable smart mirrors, FPCs connect the display panel to sensors that adjust brightness based on ambient light or user proximity. Their ability to bend along hinge lines—with dynamic bend radii as tight as 3mm—allows the mirror to fold compactly for storage while maintaining uninterrupted data transmission. Similarly, in kitchen interactive displays, FPCs enable screens to curl upward from countertops, connecting touch sensors, temperature probes, and wireless modules without restricting movement.

　　FPCs in these applications are typically constructed with ultra-thin (25–50μm) polyimide substrates and copper conductors (18–35μm thick), ensuring flexibility without sacrificing durability. They often incorporate reinforcement layers in non-bending areas to support components like connectors or integrated circuits, while the flex zones use bare copper or thin coverlays to minimize thickness. High-density interconnect (HDI) technology allows FPCs to carry complex signals, including high-definition video for streaming recipes or security feeds in smart home displays.

　　Moreover, FPCs in foldable displays are engineered to withstand millions of flex cycles. Specialized adhesives bond layers without creating stiff spots, and conductor patterns are optimized to distribute stress—traces run parallel to fold axes to reduce fatigue. This design ensures the displays remain functional for years, even with daily use. As smart homes continue to integrate more interactive, space-saving devices, FPCs will remain a key enabling technology, bridging the gap between rigid electronics and flexible, user-centric design.