| 摘要 |
PURPOSE: A backlight unit is provided to reduce a viewing angle in a display device and to allow only the user to see a screen. CONSTITUTION: A light entry surface(21) is formed in one side of a light guide plate(20). A light emitting device package faces the light entry surface on a light source(10). The light emitting device package has an asymmetric structure. The vertical orientation angle of an upper and a lower surface(22,23) is larger than that of the horizontal orientation angle of the upper and the lower surface in the asymmetric structure.
|
