EZ Group produced G-SIGN Way (road sign) and G-SIGN Window (window attached indoor signage) based on EZ Free Sheet (light guide film for surface light emitting device), the world's only technology that was independently developed and patented. are doingSince 2004, EZ Group has been conducting R&D for about 20 years to solve the problems of limited size, angle, light reflection, and durability of existing SIgnage. invented technology. The secret is hidden in the EZ Free Sheet.