The present application discloses an illumination light source including a base substrate; an anode layer on the base substrate; and a field emission illumination module having a carbon nanotubes layer on the base substrate; and a fluorescent powder layer on a side of the carbon nanotubes layer distal to the base substrate. The anode layer is on a side of the fluorescent powder layer distal to the carbon nanotubes layer.

A display apparatus according to one aspect of the present disclosure includes at least one flexible display panel including a first picture element that emits a red light, a second picture element that emits a green light, a third picture element that emits a blue light, and a fourth picture element. Each of the first picture element, the second picture element, and the third picture element includes an organic electroluminescent element as a light source and is driven by an active matrix method. The fourth picture element includes an organic electroluminescent element as a light source and is driven by a passive method.

An electroluminescence device and a display device including an electroluminescence device are provided. The electroluminescence device includes an anode including silver, wherein at least a portion of the anode substantially extends in a horizontal direction; a first layer provided over the anode; an organic layer including a luminescent layer; a cathode provided over the organic layer; and an insulating layer provided over an end portion of the anode and an end portion of the first layer, wherein at least a portion of the cathode substantially extends in the horizontal direction in a light emission region, wherein a surface of the insulating layer has a curved portion, and wherein at least a portion of the cathode within a region of the insulating layer above the curved portion extends along a first angled upward direction between the horizontal direction and the thickness direction of the anode.

A target for ultraviolet light generation 20A includes a sapphire substrate 21 that transmits ultraviolet light UV, an interlayer 22 that is in contact with the sapphire substrate 21, includes oxygen atoms and aluminum atoms in a composition, and transmits ultraviolet light UV, and a luminous layer 23 that is provided on the interlayer 22, includes oxide crystals containing rare earth elements to which an activator agent is added, and receives electron beams EB so as to generate ultraviolet light UV.

An ultraviolet light-generating target comprising a substrate transmitting ultraviolet light; and a light-emitting layer provided on the substrate and emitting ultraviolet light in response to an electron beam, wherein the light-emitting layer is an amorphous layer formed of Al.sub.2O.sub.3 doped with Sc.

A lighting device 1 has phosphors, a porous material (5), and emitters 4. The emitters are interposed between the phosphors and surfaces (2a) to be irradiated with light of the lighting device. The porous material has heat conductivity and is impregnated with the phosphors.

A full-color AM OLED includes a transparent substrate, a color filter positioned on an upper surface of the substrate, and a metal oxide thin film transistor backpanel positioned in overlying relationship on the color filter and defining an array of pixels. An array of OLEDs is formed on the backpanel and positioned to emit light downwardly through the backpanel, the color filter, and the substrate in a full-color display. Light emitted by each OLED includes a first emission band with wavelengths extending across the range of two of the primary colors and a second emission band with wavelengths extending across the range of the remaining primary color. The color filter includes for each pixel, two zones separating the first emission band into two separate primary colors and a third zone passing the second emission band.

A light emitting device includes a substrate, a light emitting element, a first resin member and a second resin member. The substrate includes a base member, a plurality of wiring portions disposed on a surface of the base member, and a covering layer covering the wiring portions with an opening formed in a part of the covering layer. The light emitting element is arranged on the substrate in the opening of the covering layer and having an upper surface at a position higher than the covering layer. The first resin member is arranged at least in the opening of the covering layer and at periphery of the light emitting element. The second resin member seals the substrate and the light emitting element. The second resin member is disposed in contact with the first resin member.

There is provided an ultraviolet-emitting material that is formed so as to include Mg.sub.1xZn.sub.xO (0<x<0.55) with a rock-salt structure or Be.sub.1xyzMg.sub.yZn.sub.xCa.sub.zO (0.45y+z<1, 0<x0.55) with a rock-salt structure.

A substrate-type LED light source (10) includes: at least one blue LED chip (2) which has an emission peak in a range from 400 nm to 480 nm so as to correspond to a blue light region absorption peak of chlorophyll; a red phosphor (7b) which emit, upon receiving excitation light from the at least one blue LED chip (2), light having a peak wavelength in a range from 620 nm to 700 nm so as to correspond to a red light region absorption peak of chlorophyll; and a resin layer (7) in which the red phosphor 7b is dispersed and which covers the at least one blue LED chip (2).