| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a backlight device for suppressing luminance irregularity when surface-emitting the whole light-emitting face while controlling luminance in light-emitting regions with no sense of discomfort. <P>SOLUTION: The vertical type backlight device 1 includes a diffusion sheet 8 having the light-emitting face 12 set on the outer face side, a mounting board 5 having a mounting face 5a opposed to the inner face side of the diffusion sheet 8, a plurality of LEDs 6 mounted on the mounting face 5a, and a frame 7 surrounding the group of LEDs 6 to form a cavity 10 between the diffusion sheet 8 and the mounting board 5. A reflection factor R1 of the mounting face 5a is set smaller than a reflection factor R2 of an inner peripheral face 7a of the frame 7. <P>COPYRIGHT: (C)2009,JPO&INPIT |
