LIGHT SOURCE DEVICE AND LIQUID CRISTAL DISPLAY DEVICE

摘要

Light from a light source (2a) enters the inside of a light guide plate (3) through an incident angle adjusting surface (8a) and exits from a sectional region (7a) through an adjusting section (6a) provided on a reflecting surface (6).  Light from a light source (2b) enters the inside of the light guide plate (3) through an incident angle adjusting surface (8b) and exits from a sectional region (7b) through an adjusting section (6b) provided on the reflecting surface (6).  Light from a light source (2c) enters the inside of the light guide plate (3) through an incident angle adjusting surface (8c) and exits from a sectional region (7c) through an adjusting section (6c) provided on the reflecting surface (6).  The brightness of the sectional regions (7a, 7b, 7c) can be optionally changed and regulated independent of each other by controlling the emission of light from the light sources (2a, 2b, 2c).