ILLUMINATION DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

In a backlight device (3) placed layered on a liquid crystal panel (2), light sources (11) are partitioned into illumination regions (15) by partition walls (12), a first light diffusion member (13) is placed over the light source, and second light diffusion member (14) is layered on the first light diffusion member (13). The first light diffusion member (13) is placed such that a light incident surface (13a), into which light from each light source (11) enters, is located at a position that is higher than the light sources (11) and at the same height as or lower than the vertexes of the partition walls (11). The second light diffusion member (14) is placed over the first light diffusion member (13) with a gap in between and with a light incident surface (14a) placed at a position higher than the vertexes of the partition walls (12). In the backlight device that is partitioned into the illumination regions and where the light sources are arranged in each of the illumination regions, each illumination region can be independently controlled without reducing performance as the illumination device.