FRONT LIGHT AND PORTABLE INFORMATION TERMINAL

摘要

PURPOSE: A reflective liquid crystal display device and a personal digital information terminal are provided to have a small and compact, economically advantageous front light that does not generate emission lines or unevenness but provides display of high quality with high efficiency and uniform brightness. CONSTITUTION: A front light arranged in front of a display device comprises a main optical guide plate; a second optical guide plate(2) having longitudinal direction arranged to extend along widthwise direction of and at an end portion of the main optical guide plate, the second optical guide plate having an end surface(2a) facing the main optical guide plate and an opposite end surface(2b), the opposite end surface(2b) including a plurality of prism-shaped grooves(12) extending in depth direction, formed along the longitudinal direction; a point light source(3) arranged at an end of the longitudinal direction of the second optical guide plate; and a reflective film(11) coated on a surface of the prism-shaped grooves.