A lighting device is provided. The lighting device includes: a lighting unit in which a plurality of light sources are mounted; a lighting cover installed to be spaced apart from the lighting unit; and a reflective sheet arranged on a light source mounting surface of the lighting unit and reflecting reflected light reflected from the lighting cover back toward the lighting cover, wherein wavelength conversion layer for converting a wavelength of the reflected light reflected from the lighting cover is laminated on the reflective sheet.

A lighting device is provided. The lighting device includes: a lighting unit in which a plurality of light sources are mounted; a lighting cover installed to be spaced apart from the lighting unit; and a reflective sheet arranged on a light source mounting surface of the lighting unit and reflecting reflected light reflected from the lighting cover back toward the lighting cover, wherein wavelength conversion layer for converting a wavelength of the reflected light reflected from the lighting cover is laminated on the reflective sheet.

A light-emitting device includes: a plurality of light-emitting elements arranged in an array on a base member; and a lens that comprises at least four Fresnel lenses disposed above the base member and facing the plurality of light-emitting elements. In a top plan view, a center of each of the plurality of light-emitting elements is offset from a lens center of the corresponding one of the Fresnel lenses of the lens in a direction toward a center of the lens. The plurality of light-emitting elements include at least two first light-emitting elements and at least two second light-emitting elements, wherein an emission color of the first light-emitting elements is different from an emission color of the second light-emitting elements.

A light source includes a plurality of light emitting elements, a light blocking member and a plurality of light-transmissive members. The light blocking member collectively supports the plurality of light emitting elements with the light blocking member being disposed in regions between the plurality of light emitting elements and in an outer periphery region located outwardly of the plurality of light emitting elements in a plan view. An upper surface of each of the plurality of the light emitting elements is exposed from the light blocking member. The plurality of light-transmissive members include a plurality of first light-transmissive members respectively disposed on the plurality of light emitting elements, and a second light-transmissive member disposed on the light blocking member in the outer periphery region.

A light emitting device comprises a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less and a first fluorescent material having a light emission peak wavelength in a range of 570 nm or more and 680 nm or less, and emits light having a correlated color temperature being 1,950 K or less, an average color rendering index Ra being 51 or more, a full width at half maximum of a light emission peak having a maximum light emission intensity in a light emission spectrum of the light emitting device being 110 nm or less, and a first glare index Ls1/L that is a ratio of a first effective radiance Ls1 to a luminance L being 0.493 or less, wherein Ls1 and L are as defined in the disclosure.

A light emitting device comprises a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less and a first fluorescent material having a light emission peak wavelength in a range of 570 nm or more and 680 nm or less, and emits light having a correlated color temperature being 1,950 K or less, an average color rendering index Ra being 51 or more, a full width at half maximum of a light emission peak having a maximum light emission intensity in a light emission spectrum of the light emitting device being 110 nm or less, and a first glare index Ls1/L that is a ratio of a first effective radiance Ls1 to a luminance L being 0.493 or less, wherein Ls1 and L are as defined in the disclosure.

Systems and methods to provide multiple channels of light to form a blended white light output, the systems and methods utilizing recipient luminophoric mediums to alter light provided by light emitting diodes. The predetermined blends of luminescent materials within the luminophoric mediums provide predetermined spectral power distributions in the white light output.

Systems and methods to provide multiple channels of light to form a blended white light output, the systems and methods utilizing recipient luminophoric mediums to alter light provided by light emitting diodes. The predetermined blends of luminescent materials within the luminophoric mediums provide predetermined spectral power distributions in the white light output.

A color conversion member, a backlight unit and a display device are discussed. The color conversion member including a reflection partition wall and color conversion material is disposed between a light source and a light path control sheet, so that the thickness of the backlight unit can be reduced, and the wavelength conversion function and the light guide function can be easily implemented by the color conversion member. In addition, by adjusting the thickness of the reflection partition wall and the thickness of the color conversion material, or by adjusting the structure of a light source protection layer located under the color conversion member, it is possible to easily implement various optical properties needed according to the backlight unit without increasing the thickness of the backlight unit.

A color conversion member, a backlight unit and a display device are discussed. The color conversion member including a reflection partition wall and color conversion material is disposed between a light source and a light path control sheet, so that the thickness of the backlight unit can be reduced, and the wavelength conversion function and the light guide function can be easily implemented by the color conversion member. In addition, by adjusting the thickness of the reflection partition wall and the thickness of the color conversion material, or by adjusting the structure of a light source protection layer located under the color conversion member, it is possible to easily implement various optical properties needed according to the backlight unit without increasing the thickness of the backlight unit.