Abstract: According to one embodiment, a backlight device includes a support frame including a first frame body including a pair of first frame members and a second frame member connected to respective ends of the first frame members and a second frame body being separate from the first frame body, which connects other respective ends of the first frame members to each other, a reflective sheet on the support frame, a light guide on the reflective sheet within the support frame, an optical sheet on the light guide, and a light source unit in the support frame. The light source unit includes a wiring board on the second frame body and a light source on the wiring board, opposing an incidence surface of the light guide.

Abstract: According to one embodiment, a backlight device includes a frame formed of a sheet material, a first adhesive layer provided on one surface of the frame, a reflective sheet attached to the frame with the first adhesive layer, an optical member disposed on the reflective sheet in the frame, and a light source disposed in the frame and configured to emit light to the optical member. In at least a part of the frame, a width of the frame and a width of the first adhesive layer are equal to each other, and at least an external surface of the frame and an external surface of the first adhesive layer are flush with each other.

Abstract: According to one embodiment, a liquid crystal display device includes a liquid crystal panel and a backlight device. The backlight device includes a case with a bottom plate and a side plate, a light guide on the bottom plate, and a light source device. The light source device includes a wiring substrate and a light-emitting element on the wiring substrate. The wiring substrate includes a mounting portion on which the light-emitting element is mounted, a connection wiring portion on a back surface side of the bottom plate, and a joint portion which joints the mounting portion and the connection wiring portion together. The joint portion extends from an inside to an outside of the case through a gap between the side plate of the case and the liquid crystal panel.

Abstract: According to one embodiment, a backlight device includes a case including a bottom plate formed from a metal plate, a plurality of side plates formed of metal plates along side edges of the bottom plate and a plurality of resin members each embedded into a gap between each adjacent pair of the side plates to form a corner portion, a light guide in the case, an optical sheet on the light guide, and a light source unit in the case, configured to emit light to enter the light guide.

Abstract: According to one embodiment, a backlight device includes a frame formed of a sheet material, a first adhesive layer provided on one surface of the frame, a reflective sheet attached to the frame with the first adhesive layer, an optical member disposed on the reflective sheet in the frame, and a light source disposed in the frame and configured to emit light to the optical member. In at least a part of the frame, a width of the frame and a width of the first adhesive layer are equal to each other, and at least an external surface of the frame and an external surface of the first adhesive layer are flush with each other.

Abstract: According to one embodiment, a backlight device includes a support frame including a first frame body including a pair of first frame members and a second frame member connected to respective ends of the first frame members and a second frame body being separate from the first frame body, which connects other respective ends of the first frame members to each other, a reflective sheet on the support frame, a light guide on the reflective sheet within the support frame, an optical sheet on the light guide, and a light source unit in the support frame. The light source unit includes a wiring board on the second frame body and a light source on the wiring board, opposing an incidence surface of the light guide.

Abstract: According to one embodiment, a backlight device includes a light guide including a first main surface which forms a light-emitting surface, a second main surface and an incidence surface crossing the first and second main surfaces, a light source unit, and an optical sheet on the first main surface of the light guide. The optical sheet includes a light source-side end portion extending over the incidence surface of the light guide to a position opposing the light source unit.

Abstract: According to one embodiment, a light source device includes a light-emitting chip, and a case in which the light-emitting chip is accommodated. The case includes a light-emitting surface which transmits light from the light-emitting chip, and a plurality of sidewalls extending so as to intersect the light-emitting surface. At least a part of the sidewalls is colored or painted in black.

Abstract: According to one embodiment, a backlight device includes a case with a bottom having an opening, a light guide LG on the bottom and having an emission surface and an incidence surface, and a light source unit in the case, configured to apply light into the incidence surface. The light source unit includes a wiring board including wiring lines and light emitting devices each having a light-emitting surface opposing the incidence surface. The wiring board includes a mounting portion opposing the incidence surface while interposing the light-emitting devices therebetween, on which the light-emitting devices are mounted, and a lead-out portion extending from the mounting portion and led out to a rear surface side of the bottom through the opening.

Abstract: According to one embodiment, an illumination device includes a light source disposed along a first direction, a light guide plate including a first end and a second end, the second end being positioned to be opposite to the first end in a second direction which crosses the first direction, a frame disposed along the second end and including an inner surface and an upper surface, and an adhesion member disposed on at least the upper surface of the frame, wherein the light source is disposed at the first end along the first direction, at least the inner surface of the frame is a light absorbing surface, and the adhesion member is light transmissive.

Abstract: According to one embodiment, a backlight device includes a frame formed of a sheet material, a first adhesive layer provided on one surface of the frame, a reflective sheet attached to the frame with the first adhesive layer, an optical member disposed on the reflective sheet in the frame, and a light source disposed in the frame and configured to emit light to the optical member. In at least a part of the frame, a width of the frame and a width of the first adhesive layer are equal to each other, and at least an external surface of the frame and an external surface of the first adhesive layer are flush with each other.

Abstract: On a projecting portion projecting from a first connecting portion to be connected to a liquid crystal panel of an FPC, a second connecting portion is provided in a projecting state like a free end to the liquid crystal panel side at a position spaced from the first connecting portion. By folding-back the projecting portion to the back side of the liquid crystal panel, the second connecting portion projects to the opposite side of the liquid crystal panel, so that the liquid crystal panel and an external circuit can be connected to each other without applying an excessively great stress to the FPC.

Abstract: On a projecting portion projecting from a first connecting portion to be connected to a liquid crystal panel of an FPC, a second connecting portion is provided in a projecting state like a free end to the liquid crystal panel side at a position spaced from the first connecting portion. By folding-back the projecting portion to the back side of the liquid crystal panel, the second connecting portion projects to the opposite side of the liquid crystal panel, so that the liquid crystal panel and an external circuit can be connected to each other without applying an excessively great stress to the FPC.

Abstract: A surface light source includes concave lens portions provided opposite to light-emitting diodes. The concave lens portions refract or align point light from the diodes. The refracted light is transformed into linear light by a light guide pipe. The linear light is further transformed into surface light by a light guide plate. Due to refraction or alignment of the concave lens portions, the point light from the diodes is efficiently transformed into the linear light. Thus, the surface light source is capable of improving the brightness of surface light transformed by the light guide plate.

Abstract: A surface light source includes concave lens portions 21 provided opposite to light emitting diodes 16. The concave lens portions refract or align point light L1 from the diodes 16. The refracted light is transformed to linear one L2 by a light guide pipe 18. The linear light L2 is also transformed to surface one L3 by a light guide plate 6. Due to refraction or alignment by the concave lens portions 21, the point light L1 from the diodes 16 is efficiently transformed to the linear light L2. Thus, the surface light source is capable of improving the brightness of surface light L3 transformed by the light guide plate.