Nichia Corporation

Takashi Matsuo

Ryohei Yamashita

Masaaki Katsumata

Yukihiro Miura

A planar light source includes: a support member; a light guide member disposed on the support member and having a light source positioning part; and a light source disposed on the support member while being in the light source positioning part of the light guide member. The support member includes: an insulation base having a first face positioned closer to the light source and a second face positioned opposite the first face, a first conductive layer disposed on the first face of the insulation base and electrically connected to the light source, an adhesive layer disposed on and in contact with the first face of the insulation base and the first conductive layer, and a light reflecting sheet disposed on the adhesive layer.

Planar light source

To provide a backlight having a positioning member that can prevent from coming off from metal frame and damaging a display panel even when used in a harsh environment such as undergoing sharp temperature changes. A backlight unit comprises a light guiding module having a light source and a light guide plate; a resin frame having a recess formed by side walls and bottom surface thereof, and housing the light guiding module; and a metal frame fitted with the resin frame, having an opening in an upper surface thereof and the opening being located above the recess of the resin frame, and allowing to pass light from the light guiding module therethrough. The resin frame has a protrusion on the top surface of one of the side walls of the recess. The metal frame has a notch on the upper surface thereof so that the protrusion passes therethrough. The opening allows the light from the light guiding module to pass therethrough.

Growing community of inventors

Tokushima, Japan

Takashi Matsuo