The display unit in a display is the smallest basic unit, usually a Pixel, that makes up the visual image on the screen. Each pixel is usually composed of multiple sub-pixels, the common color mode is RGB (red, green, blue), that is, each pixel contains three sub-pixels, each responsible for displaying a basic color. By adjusting the brightness of these sub-pixels, different colors can be formed, thus presenting rich image and video content.

Different types of display technology realize the working principle of the display unit in different ways. In a liquid crystal display (LCD), the display unit consists of liquid crystal molecules that change their arrangement under the action of an electric field to control the transmittance of the backlight. Each pixel of an LCD screen is usually composed of three sub-pixels: red, green, and blue. The LCD screen mixes colors by adjusting the transparency of each sub-pixel to form the final image. In light-emitting diode display (LED), the display unit usually refers to a single LED bulb or LED module, and the LED can emit light independently without the need for a backlight. Each LED bulb displays a different color by adjusting the brightness, which in turn displays the image. OLED display technology uses organic materials as a light source, and the red, green and blue sub-pixels of each pixel can emit light independently, without backlight, with the advantages of higher contrast and wider color gamut.

The number and arrangement of display units have an important effect on the display effect. The higher the resolution, the greater the number of display units on the screen, and the more detailed the image will be. For example, high-definition monitors typically have a resolution of 1920×1080 pixels, while 4K monitors have a resolution of 3840×2160 pixels. In addition, the density of pixels and the technical level of the display unit also affect the precision of the display effect. With the development of science and technology, the technology of display units continues to improve, which promotes the wide application of display technology in various devices such as TV, mobile phones, computers, and constantly improve the display effect.