A liquid droplet ejecting apparatus includes a droplet ejection head, an absorber, a moving mechanism, and a controller. The backlight unit includes first and second reflectors, a light source module, an optical member spaced apart from the second reflector, a first cover to come into contact with the second reflector and optical member, a second cover coupled to the first cover to support the light source module, and a third cover coupled to the first and second covers. Thus, by supposing that a failure in the authentication occurs, and by causing the user side to present the data to indicate own legitimacy for the authentication information manager, the currently valid authentication information is distributed, for example, after the encryption. The remaining portion is chopped blended with organic debris and sprayed onto the top layer of seeded soil as combination mulch.