Patent ID: 7393098

Claim:
A writing instrument comprising a substantially tubular element that extends between a first end and a second end and that is designed to be held by a user, said tubular element comprising: a reservoir of liquid; a liquid spray system comprising a liquid spray head connected to the reservoir of liquid, the spray head being designed to spray the liquid onto a medium from a distance; and a processor unit serving to activate the liquid spray system so as to enable the spray head to spray the liquid onto the medium from a distance, the tubular element further comprising: monitor means for monitoring the distance between the spray head and the medium, the monitor means being connected to the processor unit; and movement detector means for detecting movement of the spray head, the movement detector means being connected to the processor unit, wherein the processor unit is adapted to activate the liquid spray system when at least the monitor means determine that the distance between the spray head and the medium is appropriate; and wherein the processor unit is adapted to cause the frequency or the amplitude of electrical signals for activating the liquid spray system to vary as a function of the movement detected by the movement detector means.