THE THEORY AND DEVELOPMENT OF THE BACKLIGHT SYSTEM FOR LIQUID CRYSTAL DISPLAYS ♣Section 1 I, Introduction to Fundamental Optics II,Apply Optics to LGP Section 2 III,Applied Optics in the Construction of the Back-light Modules IV,The future of the Back-light Modules The Reflection and Refraction of Light 1,Reflection and refraction phenomena will happen on the interface when light transports through it.