This document specifies the minimum allowable values of energy efficiency, energy efficiency grades, energy efficiency calculations and test methods of displays (terminals). It applies to the AC or DC-powered flat-panel and curved displays that mainly serve to display video, image or text information, including general-purpose displays and commercial displays working with liquid crystal (LCD) and organic light emitting diode (OLED) respectively. This document applies to AC-powered LED display terminals working with LED, with the pixel spacing not exceeding (including) 2.5 mm, and the maximum brightness not exceeding 3,000 cd/m2. This document does not apply to the display devices with the screen size less than 11.6 inches, monitors dedicated to image evaluation in TV program shooting, production and broadcasting, dual-screen displays, special-purpose displays for virtual reality (AR/VR/MR), industrial equipment, medical equipment and LCD console (KVM/KMM), microcomputers, mobile phones and tablets, TV products with radio frequency interfaces or displays mainly dedicated to radio and TV display, and the displays that only support battery power supply.