Traditional LGPs use polymethyl methacrylate (PMMA) due to its 92% light transmittance and ease of injection molding. However, recent breakthroughs focus on glass-polymer composites. Schott’s ZERODUR® glass with 0.05ppm/°C thermal expansion coefficient reduces warpage by 70% in high-temperature applications.

Nano-doped PMMA materials, incorporating 2% ZrO₂ nanoparticles, enhance scratch resistance by 4 HRC points while maintaining 90% transparency. Quantum dot (QD)-embedded LGPs achieve 95% NTSC color gamut, though QD degradation under blue LED excitation remains a challenge.

For flexible displays, polyimide (PI)-based LGPs withstand 10,000 bend cycles without crack propagation. These 50μm-thick films use laser-induced periodic surface structures (LIPSS) to control light extraction, achieving 75% efficiency in curved automotive clusters.

Recycling advancements include chemical recycling of PMMA, yielding monomer recovery rates >95%. This addresses end-of-life concerns for 15-inch LGPs containing 300g of plastic.