Illumination device, display device, and television reception device

Abstract

A backlight deviceincludes: a chassis having a bottom plate and side plates that stand towards the front of the bottom plate from the edges of the bottom plate, the face on one side of the bottom plate being a light-output part; an LED substrate disposed on the front surface of the bottom plate; LEDsarranged on a plate face oriented toward the light-output part of the LED substrate and arranged so that the light-output part is on the light-emitting side thereof; a plurality of diffusion lensesfor covering the light-emitting side of the plurality of LEDs and diffusing the light from the LEDs; a first reflecting sheetprovided with light source insertion holes through which the LEDsare inserted at positions corresponding to the LEDs, the first reflecting sheet being laid over the front surface of the bottom plate and over the LED substrate; and a second reflecting sheetarranged so as to protrude in the direction in which the side plates rise, the ends of the second reflecting sheetbeing held between the first reflecting sheetand the plurality of diffusion lenses, the second reflecting sheetbeing held over the first reflecting sheetby coming in contact with the diffusion lensesand the first reflecting sheet