LIGHT GUIDE MEMBER, LIGHT GUIDE UNIT, LIGHT GUIDE PACKAGE, ILLUMINATION DEVICE AND DISPLAY DEVICE

摘要

In the present invention, a light guide member is provided that can locally control the amount of planar backlight and that is suitable for a thin illumination device. In the light guide member (11), a tubular portion (12) includes a recess (DH) that tapers inward from a top surface (12U) and a constriction line (LN) that is recessed inward from a side surface (12S) and that is along a tube axis direction. A wall portion (13) that is connected to the light guide member (11) and that extends in a direction intersecting the tube axis direction includes, on a side wall (13S), a rough surface (RS) for changing the light within the wall portion such that an optical path becomes suitable for emission to the outside.