The FPDM-108 LED backlight and display screen optical performance testing system is based on the testing methods for LED backlight and LCD, OLED, PDP, and other display screens in the flat panel display testing standard system, which was developed by IEC TC110. The testing system includes a testing platform with two rotation axes and a three-dimensional positioning system, a brightness meter, an imaging brightness meter, and an illumination light source. Designed to measure the brightness, chromaticity, uniformity, viewing angle, color gamut, darkroom/bright room contrast, imaging defects, and other parameters of LED backlight and display screens, it is capable of conducting various performance parameter tests for flat panel displays, as required by IEC TC110.