The light emitting structure of the present invention includes a sheet-shaped structure which absorbs excitation light and emits light with wavelength conversion and which has a maximum emission wavelength of 400 nm or more; and an antireflection material provided on a side surface of the sheet-shaped structure.

A light unit including: a light source; and an optical member that transmits and converts light emitted from the light source, wherein the optical member includes: a light guide; a low refractive index layer that is disposed on the light guide and has a lower refractive index than that of the light guide; a first capping layer that is disposed on the low refractive index layer; and a wavelength conversion layer that is disposed on the first capping layer and includes quantum dots, and the light guide includes a transparent metal oxide.

A lighting device includes a substrate, a plurality of first light converting units, and a light source. The light source emits a light passing through the plurality of first light converting units and the substrate to generate a first spectrum including a main peak between 520 nanometers (nm) to 590 nm and a first sub peak between 430 nm to 470 nm, and a first transmittance of the substrate at a wavelength of the main peak is greater than a second transmittance of the substrate at a wavelength of the first sub peak.

A light diffusing optical fiber includes a glass core, a cladding, a phosphor layer surrounding the cladding, and a plurality of scattering structures positioned within the glass core, the cladding, or both. The phosphor layer includes two or more phosphors and is configured to convert guided light diffusing through the phosphor layer into emission light such that the color of the emission light has a chromaticity within a u-v chromaticity region on a CIE 1976 chromaticity space defined by: a first u-v boundary line and a second u-v boundary line that extend parallel to a planckian locus at a distance of 0.02 Duv from the planckian locus, a third u-v boundary line that extends along an isothermal line for a correlated color temperature of about 2000 K, and a fourth u-v boundary line that extends along an isothermal line for a correlated color temperature of about 10000 K.

The invention provides a lighting device (1) comprising a light source configured to provide light source light and a luminescent element (5) comprising an elongated light transmissive body (100), the elongated light transmissive body (100) comprising a side face (140), wherein the elongated light transmissive body (100) comprises a luminescent material (120) configured to convert at least part of the light source light (11) selected from one or more of the UV, visible light, and IR received by the elongated light transmissive body (100) into luminescent material radiation (8). The side face comprises the radiation input face (111), and the body further comprises a first face (141) and a second face (142) defining a length of the body, wherein the second face comprises a first radiation exit window (112). The side face comprises a curvature with a radius r, and the concentration of the luminescent material is chosen such that at least 80% of the source light is absorbed within a first length x from the side face, wherein x/r<=0.4 applies.

The invention provides a lighting device (1) lighting device (10) comprising: (I) a first light source (110) configured to provide first light source light (101); (II) a luminescent material (200) configured to convert at least part of the first light source light (101) into luminescent material light (201); (III) a beam shaping optical element (300) having a light entrance side (341) and a light exit side (342), and a wall (347) bridging a distance between the light entrance side (341) and the light exit side (342), wherein at least part of the wall (347) is reflective for the luminescent material light (201), wherein the beam shaping optical element (300) is configured to receive at least part of the luminescent material light (201) at the light entrance side (341) and to provide beam shaped luminescent material light (201) at the light exit side (342); (IV) an elongated light transmissive body (100) having a first face (141) and a second face (142) defining a length (L) of the light transmissive body (100), and having one or more side faces (147) bridging the length (L) between the first face (141) and the second face (142), the light transmissive body (100) comprising a radiation input face (111) and a first radiation exit window (112), wherein the first face (141) comprises the radiation input face (111) and wherein the second face (142) comprises the first radiation exit window (112), wherein the radiation input face (111) is configured to receive at least part of the beam shaped light luminescent material light (201); (V) a second light source (120) configured to provide second light source light (121); wherein the elongated light transmissive body (100) is configured to receive at least part of the second light source light (121) via one or more of (i) incoupling of the second light source light (121) via the wall (347) of the beam shaping optical element (300), (ii) incoupling of the second light source light (121) via part of the first face (141) of the elongated light transmissive body (100), and (iii) incoupling of the second light source light (121) via part of the of the one or more side faces (147) of the elongated light transmissive body (100).

The invention provides a lighting device (1) comprising a plurality of light sources (100) configured to generate light source light (101), a plurality of light converter elements (200), wherein each light converter element (200) is radiationally coupled with one or more light sources (100), wherein the light sources (100) are configured at a non-zero distance from the light converter elements (200), wherein the light converter elements (200) are configured to convert at least part of the light source light into light converter light (201), the lighting device (1) further comprising a plurality of compound parabolic concentrators (300) configured in an array (310), each compound parabolic concentrator (300) having a first end (301) and a second end (302), and having a shape tapering from the first end (301) to the second end (302), wherein the light converter elements (200) are configured at the second ends (302) of the compound parabolic concentrators (300), wherein the light converter elements (200) and the compound parabolic concentrators (300) are configured to provide light converter light (201) emanating from the first ends (301) of the compound parabolic concentrators (300), and wherein the light converter elements (200) are in thermal contact with a heat sink (400).

A light source apparatus according to an aspect of the present disclosure includes a light source section that emits first light having a first wavelength band, a light guide that causes part of the first light emitted from the light source section to propagate, a wavelength converter includinng a phosphor that emits second light having a second wavelength band when the phosphor is excited with another part of the first light emitted from the light source section, and a light combiner that combines the part of the first light having exited out of the light guide with the second light having exited out of the wavelength converter. The light guide and the wavelength converter are disposed side by side, and the light source section is provided in a position where the light source section faces the light guide and the wavelength converter.

A light source apparatus according to an aspect of the present disclosure includes a light source section that emits first light and excitation light having a first wavelength band, a light guide that causes the first light emitted from the light source section to propagate, a wavelength converter including a phosphor that emits second light having a wavelength band different from the wavelength band of the excitation light when the wavelength converter is excited with the excitation light emitted from the light source section, and a light combiner that combines the first light having exited out of the light guide with the second light having exited out of the wavelength converter. The light guide and the wavelength converter are disposed side by side, and a light transmissive member that transmits the first light is provided between the light source section and the light guide.

The present disclosure relates to the field of display technologies, and especially discloses a backlight device and a method for manufacturing the same. The backlight device includes a backlight source, a light guide plate, a reflective layer, an optical adhesive layer and an outcoupling structure. Specifically, in the backlight device, the reflective layer and the light guide plate are located on opposite sides of the backlight source respectively.