Patent ID: 8363179

Claim:
A liquid crystal display device comprising a backlight including light sources to illuminate a liquid crystal panel from a rear side thereof, and a chassis to hold the backlight, the backlight comprising: a plurality of light-source units each including a combination of an LED that emits light in a direction parallel to a display surface of the liquid crystal panel, a wiring board on which the LED is mounted, and a light-guide plate having translucency for guiding the light of the LED toward the liquid crystal panel, a metal chassis supporting the light-source units, and a thermally conductive sheet making close contact with and inserted between the metal chassis and a reverse side of the wiring board opposite a face of the wiring board on which the LED is mounted, wherein a first wiring pattern is formed on the reverse side of the wiring board, wherein the metal chassis and a portion of the first wiring pattern located within a predetermined distance from the outer periphery of the LED are connected through the thermally conductive sheet to each other, and wherein the wiring board includes a board material substrate, a second wiring pattern formed on the face of the wiring board, such that the first and second wiring patterns are respectively disposed to both sides of the board material substrate, a resist to electrically insulate a predetermined area of each of the wiring patterns, and a through hole to electrically connect the first and second wiring patterns.