| 摘要 |
PROBLEM TO BE SOLVED: To develop a light guide plate and a surface light source device capable of forming a front light type reflective liquid crystal display device having superior visibility such as contrast, brightness and the like, by suppressing drop and variation of the brightness due to adding an antireflection layer in a lighting mode, while preventing the occurrence of a whitened blur, contrast drop or the like deteriorating the visibility due to overlap between displayed image and reflecting light on the underside of the light guide plate in both lighting mode and ambient light mode with the antireflection layer. SOLUTION: The light guide plate is formed by bonding the antireflection plate 12 including a circular polarizing plate to the underside of a plate-like body 1 via an adhesive layer 13 having a lower refractive index than that of the plate-like body 1. The plate-like body 1 transmits an incident light from an incident surface through a light projecting means (A) formed on the top surface of the body 1, and emits the light from the underside of the body 1. The surface light source device 10 is formed by disposing a light source 2 on one or not less than two side faces of the light guide plate. The reflective liquid crystal display device is formed by disposing liquid cells having a reflective layer 21 on the light emitting side of the surface source device 10. |
