EMI (electromagnetic interference) refers to unwanted electromagnetic disturbances that can disrupt the proper functioning of electronic devices. They typically originate from other sources such as power supplies, motors, transformers, transmission lines or wireless devices, and can propagate through cables or by radiation.
In the context of electronic displays (LCD, OLED, TFT) and touch panels, EMI can cause image flickering, graphical distortions, touch instability or even loss of functionality. Therefore, modern device designs incorporate measures to reduce emissions and improve immunity, such as EMI shielding, filters, proper grounding, galvanic isolation or EMC-compliant PCB layout. Minimizing EMI is crucial in industrial, medical and military applications, where strict standards (e.g. IEC 61000 or EN 61000) demand reliable and safe operation.
