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See Chinese contents: GB 32028-2015 GB 32028-2015: Minimum allowable values of energy efficiency and energy efficiency grades for projectors
This Standard specifies the minimum allowable values of energy efficiency, energy-conservation evaluation values, energy efficiency grades, test methods and inspection rules for projectors. This Standard applies to liquid crystal display (LCD) and digital light processing (DLP) projectors that use projection as the main function, and high-pressure mercury lamp or metal halide lamp as the light source. Solid-state light source projectors and projectors that use the liquid crystal on silicon (LCOS) as the display device can be executed by reference to this Standard.
