Display unit casting arrangement for LED display screen

The utility model relates to a display unit casing arrangement for LED display screens. The existing display unit casting arrangement for LED display screens for large area indication adopts the simple frosting flat plate design which can isolate an LED light source and outside air, eliminate influences of dust, moisture, etc., and the frost on the surface can simultaneously eliminate the influence of the solar specular reflection. However, the design still has the solar diffuse reflection on the frosting flat plate, and the diffuse reflection can cause actual colors observed by observers on roads, such as driver, etc., to be different from the original colors of the LED. In the observation angle with strong sunlight and relatively weak LED light, the difference is so considerable that the signal lamp color discrimination of observers can be influenced. The utility model adopts special outer casing shape design, using a casing composed of composite curves with two paraboloid sides and two cylindrical surface sides on each effective road observation angle to effectively eliminate the influence of the sunlight towards the signal lamp color of the LED display unit. The utility model has the advantages of mass production and low cost.