What type of signal is used for an LCD?

An LCD (Liquid Crystal Display) typically uses a digital signal to control the display of images and text. This signal can be in the form of a parallel or serial communication protocol, such as HDMI, DisplayPort, or LVDS (Low-Voltage Differential Signaling). The digital signal modulates the backlight and adjusts the liquid crystals to create the desired visual output. Additionally, analog signals may be used in older LCD technologies, but digital signals are predominant in modern displays.