LCDs

An LCD consists of layers of plastic and glass as well as the actual liquid crystal chemical.
Image: Wikimedia Commons.

LCDs (liquid crystal displays) are a common display type used for computer monitors, laptops, televisions, telephones, calculators, and watches.

Physically, an LCD consist of special plastics and glass with the actual liquid crystal chemical sandwiched in between. The assembly is held together with metal edging.

The LCD may have a backlight, typically a cold cathode fluorescent lamp (CCFL) or light emitting diodes (LEDs). The newer LCD screens use LEDs.  CCFLs contain a small amount of mercury, a heavy metal which is ecotoxic.

A recent innovation in LCD recycling is a machine that can process the screens automatically rather than using manual disassembly.

Further information

Last updated: July 15, 2018 at 14:56 pm