A light-emitting device includes a board on which light sources are disposed; a sectioning member including a ridge part having segments that configures a grid pattern, and a wall part surrounding the light sources, and extending from the ridge part toward the board such that an interval between two adjacent portions of the wall part joining along the ridge part becomes wider toward the board; and one or more integrated circuits configured to drive the light sources. The sectioning member and the integrated circuits are disposed on the same side of the board as the light sources. A space is defined between the back surface of the sectioning member and the board. One of the one or more integrated circuits is square or rectangular, and overlaps an intersection of segments of the ridge part, such that the sides are oblique with respect to the ridge part.

Embodiments of the disclosure relate to a backlight unit and a display device including the same. Specifically, there may be provided a backlight unit with enhanced image quality and a display device in the same, which include a plurality of light sources disposed on a printed circuit and spaced apart from each other, a reflector disposed on the printed circuit and including at least one protrusion disposed to correspond to the at least one light source and a diffusion plate disposed on the reflector, wherein the protrusion surrounds at least one light source, and wherein the protrusion includes at least one opening in a side surface thereof.

Optical films are disclosed. More particularly, optical films including a collimating reflective polarizer are disclosed. The optical films are useful in backlights, and in particular backlight recycling cavities. Constructions suitable with both edge-lit and direct-lit backlights are disclosed.

A display apparatus including a frame, light emitting diode chips separated from each other and regularly arranged in a matrix on the frame, an optical part including a display panel and at least one of a phosphor sheet and an optical sheet, a light guide plate disposed between the frame and the optical part to cover the light emitting diode chips, at least one reflector disposed between the frame and the light guide plate to reflect at least part of light emitted from the light emitting diode chip to direct at least part of light emitted therefrom to the light guide plate, and a first-type electrode and a second-type electrode, in which at least one of the light emitting diode chips is a flip-chip type and includes a first-type semiconductor layer electrically connected to the first-type electrode and a second-type semiconductor layer electrically connected to the second-type electrode.

According to one embodiment, an illumination device includes a substrate, a plurality of light emitting elements mounted on the substrate, an optical sheet located on the light emitting elements, and a foam located between the light emitting elements and the optical sheet and overlapping the light emitting elements.

A display apparatus according to an embodiment of the present disclosure comprises: a substrate; a light-emitting unit including a light emitting element mounted on the substrate and a lens placed above the light-emitting element; a reflective layer placed on the upper surface of the substrate; an optical sheet placed above the reflective layer and placed at a height at which the optical sheet is spaced from the light-emitting unit; and a display panel placed on the upper surface of the optical sheet, wherein the lens has a cutout portion formed therein by depressing a part of the side surface thereof toward the center thereof, thereby providing an anisotropic light distribution.

An object is to promote a reduction in thickness of a light guide plate and to provide a technique for suppressing brightness non-uniformity in the light guide plate. A light guide plate includes: a depressed portion provided on an opposite side of a light exit surface from which light is emitted; a first direction changing portion which is provided inside the depressed portion and above a light emitting element in a direction oriented toward the light exit surface, the light emitting element being provided on the opposite side of the light exit surface, and which changes a direction of travel of at least a part of light of the light emitting element; and a second direction changing portion which is provided above the light emitting element and higher than the light exit surface and which changes a direction of travel of at least a part of light of the light emitting element.

Darkening of the periphery of a light-emitting module in which a plurality of light-emitting units are two-dimensionally arranged is reduced. The present light-emitting module has a light-emitting region including a plurality of light-emitting units two-dimensionally arranged, the light-emitting units each including a light-guiding plate having a first main surface, a first recess opening toward the first main surface, a second main surface opposite to the first main surface, and a second recess opening toward the second main surface; a light source inside the first recess; and a light-reflective first member inside the second recess. In each of the light-emitting units, a center of the light-emitting unit and a center of the second recess coincide with an optical axis of the light source in a plan view. In at least one of the light-emitting units, a center of the first member is closer to a center of the light-emitting region than the optical axis of the light source is in a plan view.

A prism sheet includes a sheet body that includes opposite light exiting and incident surfaces, and a lateral side transversely connected between the light incident and exiting surfaces. The light exiting surface includes two side regions disposed on two opposite sides of a reference line on the light exiting surface, which is perpendicular to the lateral side. The sheet body further includes a plurality of parallel microstructure members protruding from the light exiting surface and extending perpendicularly to the lateral side. The microstructure members have a distribution density decreased in a density-decreasing direction parallel to the lateral side and pointing toward either of the side regions from the reference line.

A lighting device comprising light radiation sources (12a, 12b, 12c, 12d) arranged in a plurality of cells (CI, C2, C3, C4) wherein each cell comprises at least one light radiation source, an output screen (16) for receiving light radiation from said light radiation sources (12a, 12b, 12c, 12d), and optical elements (18, 20) arranged between said cells (CI, C2, C3, C4) and said screen (16) so as to convey onto said screen (16) with a uniformly distributed intensity the light radiation produced by said light radiation sources (12a, 12b, 12c, 12d), the illumination of said screen (16) resulting from the superimposition of light radiation individually produced by the cells of said plurality (CI, C2, C3, C4).