Analysis of the laser patterning inside light guide panel

The objective of this research is to evaluate the feasibility of the internal patterning in the light guide panel (LGP) by applying laser engraving. LGP fabricated by the internal patterning is proposed as it offers better efficiency than is provided by bottom surface patterning. The patterns fabricated by laser engraving system could improve efficiency by approximately 40%, requiring less energy consumption in average brightness and uniformity than required by bottom surface patterned devices. Internal scatters were fabricated by Q-switched 2nd harmonic Nd:YAG laser engraving system. The performance of the fabricated LGPs was measured and its results analyzed. Modification of the shape of the LGP patterns from the simple geometry has been investigated to control the uniformity. The proposed internal scatter embedded LGP with laser engraving could provide an alternative method to conventional bottom surface scatters type with optimized patterns and geometry.