Defective pixel

"Dead pixels" redirects here. For the British television sitcom, see Dead Pixels.
Close-up of an LCD, showing a dead green subpixel as a black rectangle

A defective pixel or a dead pixel is a pixel on a liquid crystal display (LCD) that is not functioning properly. The ISO standard ISO 13406-2 distinguishes between three different types of defective pixels,[1] while hardware companies tend to have further distinguishing types.[2]

A photograph taken with a damaged image sensor

Similar defects can also occur in charge-coupled device (CCD) and CMOS image sensors in digital cameras. In these devices, defective pixels fail to sense light levels correctly, whereas defective pixels in LCDs fail to reproduce light levels correctly.

  1. ^ Alzieu, Vincent (22 May 2007). "A look into dead pixels". BeHardware.com. Archived from the original on 27 February 2015. Retrieved 9 June 2016.
  2. ^ Apple Technician Training