Patent ID: 7563014
Filing Date: 2009-07-21
Classification: G02B,G02F

Abstract:
1. A planar light source device comprising: a light guide plate; a linear light source disposed in a light incident side of the light guide plate; a reflective sheet disposed in a rear side of the light guide plate; and a heat spreader sheet disposed in a rear side of the reflective sheet, wherein along a first edge of the heat spreader sheet adjacent the linear light source, a distance between a first portion of the first edge and the linear light source is different than a distance between a second portion of the first edge and the linear light source, wherein the first portion and the second portion are further away from the linear light source that is a light incident side surface of the light guide plate, and wherein, in a vicinity of an electrode portion of the linear light source, the first portion is further from the light incident side surface of the light guide plate than is the second portion, and an another edge of the heat spreader sheet is substantially aligned with a corresponding side surface other than the incident side surface of the light guide plate.