Portable changeable lighted sign

Claim 1

A portable changeable sign comprising: an elongate rectangular base adapted to be vertically self-supporting along one side thereof; a direct current power supply disposed within the base; a fluorescent light tube disposed within the base; the base further including a transparent lens adjacent the light tube; a switch for selectively connecting the power supply to the light tube; a screen element constructed of a single piece of semi-rigid translucent plastic material permanently creased along a medial edge thereof to form first and second display panels adapted for receiving light from the light tube and diffusing the light to a removable plastic message element disposed on an outer surface of at least one display panel, the display panels forming an acute angle at the medial edge when deployed with the lower edges of said panels spread for removable attachment to the elongate base, said panels being movable to a flat storage position when removed from the elongate base; and disengageable fastening material disposed upon opposite upper side portions of the elongate base and opposite lower inner portions of the first and second display panels.