A pixel is the smallest individual element of an image displayed on a screen. Each pixel corresponds to a single point in the image and can vary in brightness and color. In color displays, a pixel typically consists of three subpixels: red (R), green (G), and blue (B), whose combination allows the rendering of the full color palette.
The number of pixels across horizontal and vertical axes defines screen resolution (e.g., 1920×1080 means 1920 horizontal × 1080 vertical pixels, over 2 million in total). The higher the number of pixels per inch (PPI), the greater the image sharpness and detail.
Pixels are the basis of all display technologies – LCD, OLED, e-paper – and precise pixel control determines image quality, color accuracy, and user comfort.
