The brightness of the LED display refers to the luminous intensity per unit area of the display when the display is working normally, the unit is cd / m2 (that is, how many cd luminous intensity per square meter area, "cd" Chinese name candela, "m2" Chinese called square meters).
The higher the brightness of the LED display, the better the vividness of the image and the clearer the distance. The brightness of the indoor video screen is generally between 200 ~ 1200cd / m2. The brightness of outdoor video screen is generally between 3000 ~ 7000cd / m2.
The brightness of the LED display is an indicator that is more difficult to measure. Generally, it can be calculated by testing the light intensity of the luminous tube of the display, such as the white balance of an outdoor LED display of 400 points / m2 (red mcd + green mcd + blue mcd) * 400/1000 = cd / m2