What is the difference between ultraviolet led and violet led, and anti-ultraviolet led, know say.

Ultraviolet led is to put out light in the ultraviolet frequency range of the led, violet led is to put out light is purple led. purple light is visible, ultraviolet light is invisible. Anti-ultraviolet led is not sensitive to ultraviolet light, ultraviolet light on its interference and physical damage is very small led.