| 摘要 |
PROBLEM TO BE SOLVED: To provide a backlight unit for a display device which permits a light beam spread angle to be regulated while mitigating limitation in design such as the size and arrangement of a light source module, without increasing the width of a peripheral region of the display device.SOLUTION: The present invention relates to a backlight unit for a display device and a driving method thereof. A backlight unit for a display device includes: a light source module; a light guiding plate which guides the light incident from the light source module toward a front surface; and a light beam spread angle regulating sheet which is disposed between the light source module and a lateral surface of the light guiding plate and regulates a light beam spread angle of the light incident from the light source module. |
