EMI shielding is a technique for protecting electronic devices from electromagnetic interference by using special materials or structures that block radiation. In practice, this means creating a physical barrier – often with metal enclosures, conductive foils, meshes or coatings – that absorbs or reflects unwanted signals, preventing them from entering or leaving the device.
In displays and touch panels, shielding protects sensitive components (such as touch controllers or video processing chips) from interference caused by other system elements like power supplies, antennas or data buses. It is also used in cables (e.g. LVDS, HDMI) and around components that emit high levels of interference.
EMI shielding is especially important in industrial, medical, automotive and railway devices, where electromagnetic disturbances can cause malfunctions or safety hazards. Proper shielding is a fundamental requirement for meeting EMC standards.
