An exemplary printable composition of a liquid or gel suspension of diodes generally includes a plurality of diodes, a first solvent and/or a viscosity modifier. An exemplary apparatus may include: a plurality of diodes; at least a trace amount of a first solvent; and a polymeric or resin film at least partially surrounding each diode of the plurality of diodes. Various exemplary diodes have a lateral dimension between about 10 to 50 microns and about 5 to 25 microns in height. Other embodiments may also include a plurality of substantially chemically inert particles having a range of sizes between about 10 to about 50 microns.

A reflective sheet includes a bottom portion; a plurality of inclined portions disposed at an incline from a periphery of the bottom portion; and a fold disposed in a predetermined position on the reflective sheet at a predetermined position in a direction orthogonal to a surface of the bottom portion.

A backlight assembly capable of reducing light loss is presented. The backlight assembly includes a plurality of substrate units and a plurality of reflective members on the substrate units arranged to form an adjacent area where two reflective members are closest to each other. The adjacent area is on one of the substrate units. A display device incorporating the backlight assembly is also presented.

A light source device is obtained, which has an enhanced light distribution characteristic with sufficiently homogeneous diffused light and can be readily manufactured with a simple configuration. The light source device has a substrate 2, a board-like first reflector 3 erected vertically to traverse a center section on the substrate 2 while both side surfaces face outward, and a plurality of LED chips 4 positioned on the substrate 2 as a plurality of light emitting elements so as to surround the first reflector 3. At least both side surfaces of the first reflector 3 have a light reflecting function. Thereby, a light source device is obtained, which has an enhanced light distribution characteristic with sufficiently homogeneous diffused light and can be readily manufactured with a simple configuration.

A lamp includes an extended planar light source, and an optical element arranged with the light source, wherein the optical element comprises an outer surface having an indented cusp substantially over the light source. A lamp includes an extended planar light source, and an optical element arranged with the light source, wherein the optical element comprises an outer surface having a portion at a peripheral edge comprising a curvature configured to redirect light emitted from the light source by total internal reflection.

A luminaire includes a housing defining an interior volume. The luminaire also includes a lamp within the interior volume and configured to emit light. Additionally, the luminaire includes a wireless antenna positioned within the interior volume, configured to transmit or receive a wireless signal along a first direction, and configured to be operatively coupled to an access point. The wireless antenna can be entirely within the interior volume. The luminaire can include a first reflective surface within the interior volume and configured to redirect the wireless signal. The lamp can be configured to be electrically coupled to a power inserter that powers the access point.

An illuminating device includes a light source having a light-source optical axis, a lens that is located substantially parallel to the light-source optical axis such that a surface of the lens faces the light-source optical axis, the lens extending to a position rearward of the light source in a direction of the light-source optical axis, and a light reflecting portion located so as to be opposed to a front side of the light source, the light reflecting portion being adapted to reflect emitted light of the light source obliquely rearward of the light source, and reflect the emitted light toward the lens.

The present application relates to a lighting device (1) comprising a main body (2) having an inner surface (3) and an outer surface (4). The inner surface (3) at least in part forming a section (12) for receiving a light source. The outer surface (4) having a first thread (8) along at least part of said outer surface (4), wherein said first thread (8) is for directly or indirectly securing the lighting device (1) in a building part. The invention further relates to a receiving element (17) and an insertion (29) for use with the lighting device (1).

A luminaire includes a housing defining an interior volume. The luminaire also includes a lamp within the interior volume and configured to emit light. Additionally, the luminaire includes a wireless antenna positioned within the interior volume, configured to transmit or receive a wireless signal along a first direction, and configured to be operatively coupled to an access point. The wireless antenna can be entirely within the interior volume. The luminaire can include a first reflective surface within the interior volume and configured to redirect the wireless signal. The lamp can be configured to be electrically coupled to a power inserter that powers the access point.

An example light source unit, comprising: a light emitting plate that emits light toward a front; an optical sheet that is separated from and faces a front surface of the light emitting plate; a support part that supports an edge portion of the optical sheet; and a holding section that faces an edge portion of a front or a back side of the optical sheet and holds the optical sheet.