What is a pixel?

A pixel (a word invented from “picture element”) is the most basic unit of programmable visual content within an LCD display. For a common graphic 128×64 LCD, the display comprises 128 solid columns and 64 solid rows. The display is capable of producing a square pixel in each location where the rows and columns intersect. In this example of a 128×64 display, the LCD display is capable of producing 8,192 unique pixels to be used for simple text and/or graphic images.