Benefits of Using a Diffuser Layer in Different Types of Membrane Switches
Diffuser Layer Benefits Across All Major Membrane-Switch Platforms A diffuser layer—typically 75–125 µm of micro-textured polycarbonate (PC) or polyethylene terephthalate (PET)—functions dually as an optical manager and mechanical buffer . Its micro-textured surface scatters light to resolve optical inconsistencies, while its thin, flexible structure absorbs minor mechanical stress. Below are the quantifiable performance gains it delivers across each mainstream membrane switch architecture. 1. LED-Backlit Membrane Switches LED-backlit designs rely on consistent light distribution to ensure readability (e.g., in industrial control panels, medical devices, or consumer appliances). The diffuser layer addresses three critical optical challenges in these systems: Hot-Spot Elimination LEDs emit light in a directional, concentrated pattern, creating "hot spots" (over-lit areas) at the LED source and "cold spots" (under-lit areas) at the switch edges without a diffuser....