sterilized button / elevator button

There may besanitary problems since a number of invisible bacteria are adhered on the elevator button touched by the hands of many peoples.
To effectively improve this problem, a control device for elevator was reorganized.
An U/V sterilizer for disinfection is incorporated inside of the button at 45 degree and U/V ray emitted downward is not directly disclosed to the human eyes and only surface of the button is allowed.