A dot matrix is a 2-dimensional patterned array, used to represent characters, symbols and images. Most types of modern technology use dot matrices for display of information, including mobile phones, televisions, and printers. The system is also used in textiles with sewing, knitting and weaving.
Dot matrix pattern woven into fabric in 1858 using punched cards on a Jacquard loom
Dot matrix-style skywriting
In digital imaging, a pixel, pel, or picture element is the smallest addressable element in a raster image, or the smallest addressable element in a dot matrix display device. In most digital display devices, pixels are the smallest element that can be manipulated through software.
A photograph of subpixel display elements on a laptop's LCD screen
Pixel art
Geometry of color elements of various CRT and LCD displays; phosphor dots in the color display of CRTs (top row) bear no relation to pixels or subpixels.
Samsung UA40M5860AKCHD TV subpixels