A light emitting device includes a support having an interstice and at least one LED located in the interstice and at least one of a waveguide or an optical launch having a transparent material encapsulating the at least one LED located in the interstice.

The present invention provides a backlight unit capable of realizing a wide color gamut of a display device by reduction of the spectral half-width of light. The backlight unit provided by the present invention comprises: a light source which is formed so as to provide primary light; a quantum dot phosphor which is excited by the primary light provided from the light source and emits secondary light having a wavelength different from the wavelength of the primary light, the quantum dot phosphor being arranged so as to be spaced apart from the light source; and a light cutting agent which absorbs light of a specific wavelength from the primary light or the secondary light.

This disclosure provides a lighting device which comprises a support structure comprising a locking mechanism, a light source arranged in contact with the support structure, a wavelength converter configured to convert light from a first wavelength range to a second wavelength range, the wavelength converter having a light entrance surface configured to receive light and a light exit surface configured to emit light. The wavelength converter is releasably connected to the support structure in a locked position via said locking mechanism, and the light entrance surface is arranged in optical contact with the light source.

A light emitting device (1) comprising at least one light source (2) adapted for, in operation, emitting first light (13) with a first spectral distribution, a light guide (4) made of a luminescent material and comprising a light input surface (41) and a light exit surface (42) extending in an angle different from zero to one another, the light guide further comprising a first further surface (46) extending parallel to and arranged opposite to the light exit surface, wherein the light guide is adapted for receiving the first light (13) with the first spectral distribution at the light input surface, converting at least a part of the first light with the first spectral distribution to second light (14) with a second spectral distribution, guiding the second light with the second spectral distribution to the light exit surface and coupling the second light with the second spectral distribution out of the light exit surface. The light emitting device further comprises a phosphor element (77) arranged adjacent to the first further surface and a reflective element (76) arranged adjacent the phosphor element opposite to the first further surface (46). The phosphor element is adapted for converting light incident from the light guide to third light (17) with a third spectral distribution and the light guide (40) is furthermore adapted for receiving the third light (17) with the third spectral distribution at the first further surface (46), guiding the third light (46) with the third spectral distribution to the light exit surface (42) and coupling the third light with the third spectral distribution out of the light exit surface.

Generally, the present disclosure provides for a light duct sensor that can monitor an average light flux through light duct useful for architectural lighting. The present disclosure provides for a system that allows a minimally obtrusive sampling of the light in a duct. It samples a small fraction of a cross sectional area of a light duct that is distributed across potentially the entire cross sectional area, without creating a significant disturbance to the light.

The disclosure provides a light guiding plate, used in a backlight module. The light guiding plate comprises a main board body and a sub board body. The main board body has an illuminating surface, a back surface opposite to the illuminating surface, and a first incident surface connected with the illuminating surface and the back surface. A plurality of quantum dots is uniformly embedded inside the sub board body. The sub board body is disposed on the first incident surface. The sub board body completely covers the first incident surface. The sub board body has a second incident surface, and the second incident surface is away from the first incident surface. The second incident surface is disposed opposite to a backlight source of the backlight module. The disclosure further provides a backlight module and a display.

An optical film including a first film substrate and a coating layer formed on the first film substrate. The coating layer of this optical film contains a binder resin and fine particles with an average size of 0.5 μm or more and 10.0 μm or less and a standard deviation in size that is less than ½ of the average size.

The disclosure provides a backlight module. Light reflected back and forth inside a display device is fully utilized, and luminescent efficiency of a luminescent device inside the display device is improved. In addition, the backlight module has a simple structure, which can solve technical problems of occurrence of strip black lines and uneven brightness that result from an application of a conventional backlight module in a large-scale display device by simply adding a refractive layer or a reflective layer.

Wide-area solid-state illumination devices and systems, including one or more linear arrays of compact solid-state light sources, such as LEDs, a light guiding sheet of an optically transmissive material optically coupled to the light sources, and an optically opaque grid panel defining a series of openings for light passage. The light guiding sheet includes a light extraction surface pattern having a series of light extraction areas alternating with separation areas. The light guiding sheet is positioned over the grid panel such that the light extraction areas are disposed in registration with the openings in the grid panel.

A solid body made of an inactive, light transmissive material has embedded therein an optical fiber having a lengthwise segment in which a scattering structure is formed that is to redirect primary propagating light sideways out of the fiber. An active photoluminescent layer integrated in the optical fiber is to wavelength-convert the primary light into secondary light. The solid body is generally cylindrical but without rotational symmetry about the center longitudinal axis of the fiber. A portion of the outer side surface of the body is curved and is covered by an external reflector, while another portion of the outer side surface is uncovered by the reflector in order for the secondary light to emerge. Other embodiments are also described and claimed.