Patent ID: 6837639

Claim:
An illuminable writing instrument, comprising: a hollow elongated body having a first end, an opposed second end, and a receiving cavity, wherein said elongated body is adapted for a light passing from said receiving cavity to outside; a writing unit, having a writing tip, disposed in said receiving cavity of said elongated body; an actuator mounted at said second end of said elongated body to move said writing unit from a normal unemployed position that said writing tip of said writing unit is received within said receiving cavity to an operation position that said writing tip of said writing unit is pushed out of said elongated body at said first end thereof; and an illumination arrangement comprising an illuminating unit supported within said receiving cavity of said elongated body and a switch control which is electrically connected to said illuminating unit and is arranged to activate said illuminating unit for providing a lighting effect throughout said elongated body while actuating said writing unit via said actuator, wherein said illuminating unit comprises a power source received in said receiving cavity of said elongated body at said second end thereof, an IC board supported within said receiving cavity of said elongated body to electrically connect to said power sources, and at least an illuminator electrically mounted on said IC board in such a manner that when said illuminating unit is activated via said switch control, said illuminator is arranged for producing said lighting effect throughout said elongated body, wherein said IC board, having a predetermined length, is positioned within said receiving cavity of said elongated body between said first and second ends thereof for diffusing said lighting effect throughout said elongated body.