LED display is the red, green, blue light-emitting two-stage tube to express the image, for the electronic display to show black then his method is not luminous (because there is no black light in nature) so all the electronic display surface is designed black. such as television, plasma display, computer display screen and other surfaces are black.
White lamp Contrast is 3,000:1, and black lamp contrast is up to 10,000:1, black light contrast ratio is three times times higher than white light, obviously the contrast of the clarinet compared to white tube has obvious advantages.
