A computer monitor is the primary visual output device for a desktop computer, laptop docking station, or other video source, displaying text, graphics, videos, and user interfaces. Its core component is the display panel, which utilizes technologies like LCD (Liquid Crystal Display), LED (Light Emitting Diode) backlit LCD, OLED (Organic Light Emitting Diode), or newer Mini-LED/QLED. LCD panels work by manipulating liquid crystals with electrical currents to control the passage of light from a backlight (traditionally fluorescent, now almost universally LED arrays) through red, green, and blue sub-pixels, creating the full-color image. Resolution, measured in pixels (e.g., 1920×1080 (Full HD), 3840×2160 (4K UHD)), defines image sharpness and detail. Refresh rate (measured in Hertz, e.g., 60Hz, 144Hz) indicates how many times per second the image updates, crucial for smooth motion in gaming and video.