Patent ID: 8830422
Filing Date: 2014-09-09
Classification: G02B,G02F

Abstract:
1. An edge-light illuminating device for illuminating a liquid crystal display panel from a back side of the panel, the device comprising: a light guide plate; a light source that faces an edge face of the light guide plate, and is arranged to project light onto the edge face; a case arranged to house the light guide plate and the light source; and a reflection sheet that is laid on a bottom face of the case, and sandwiched between the bottom face and a back face of the light guide plate housed in the case, wherein the reflection sheet comprises a plurality of slot portions or incision portions that is disposed along a direction that the reflection sheet expands by heat generated by the light source; the plurality of slot portions or incision portions is disposed along a side of the reflection sheet; and the plurality of slot portions or incision portions is disposed in a radial pattern.