The present invention generally relates to a method for operating a plurality of field emission light sources, specifically for performing a testing procedure in relation to a plurality of field emission light sources manufactured in a chip based fashion. The invention also relates to a corresponding testing system.

The present invention generally relates to a method for operating a plurality of field emission light sources, specifically for performing a testing procedure in relation to a plurality of field emission light sources manufactured in a chip based fashion. The invention also relates to a corresponding testing system.

The present invention generally relates to a field emission light source and specifically to a field emission light source adapted to emit ultraviolet (UV) light. The light source has a UV emission member provided with an electron-excitable UV emitting material. The material is at least one of LuPO.sub.3:Pr.sup.3+, Lu.sub.2Si.sub.2O.sub.2:Pr.sup.3+, LaPO.sub.4:Pr.sup.3+, YBO.sub.3:Pr.sup.3+ and YPO.sub.4:Bi.sup.3+.

The present invention generally relates to a field emission light source and specifically to a field emission light source adapted to emit ultraviolet (UV) light. The light source has a UV emission member provided with an electron-excitable UV emitting material. The material is at least one of LuPO.sub.3:Pr.sup.3+, Lu.sub.2Si.sub.2O.sub.2:Pr.sup.3+, LaPO.sub.4:Pr.sup.3+, YBO.sub.3:Pr.sup.3+ and YPO.sub.4:Bi.sup.3+.

The present disclosure generally relates to field emission cathode structure for a field emission arrangement, specifically adapted for enhance reliability and prolong the lifetime of the field emission arrangement by arranging a getter element underneath a gas permeable portion of the field emission cathode structure. The present disclosure also relates to a field emission lighting arrangement comprising such a field emission cathode structure and to a field emission lighting system.

Provided is an electroluminescent device that emits light of a single color and includes a plurality of functional layers, in which an absorption peak is included in the emission wavelength and at least one absorption peak is included in a complementary color region of an emission wavelength in the range of 380 nm to 780 nm, an absolute value of a deviation (uv) of a color coordinate of front reflected light at the time of white color illumination from a blackbody locus is below 0.02, and a refractive index and a film thickness of each of the plurality of functional layers are determined to satisfy the formula D()D(0)cos (0.sub.D60 degrees) when an angle dependence of emission intensity is defined as D().

An ultraviolet light generation target includes a light emitting layer. The light emitting layer contains a YPO.sub.4 crystal to which at least scandium (Sc) is added, and receives an electron beam to generate ultraviolet light. Further, a method of manufacturing the ultraviolet light generation target includes a first step of preparing a mixture containing yttrium (Y) oxide, Sc oxide, phosphoric acid, and a liquid, a second step of evaporating the liquid, and a third step of firing the mixture.

An ultraviolet light generation target includes a light emitting layer. The light emitting layer contains a YPO.sub.4 crystal to which at least scandium (Sc) is added, and receives an electron beam to generate ultraviolet light. Further, a method of manufacturing the ultraviolet light generation target includes a first step of preparing a mixture containing yttrium (Y) oxide, Sc oxide, phosphoric acid, and a liquid, a second step of evaporating the liquid, and a third step of firing the mixture.

Provided is a light-emitting device and a method for manufacturing the same which avoid a distinct color unevenness during the light emission even if variations are present among the light-emitting elements in the concentration of the phosphor that precipitates in the resin for sealing the light-emitting elements. The light-emitting device includes a substrate, a plurality of light-emitting elements that are mounted on the substrate, a first resin layer that integrally seals the light-emitting elements and includes a first phosphor that is excited by light from the light-emitting elements at a concentration that is high as it goes to a lower end near the substrate from an upper end distant from the substrate, and a second resin layer that is provided at an upper side of the first resin layer and includes a second phosphor that is excited by light from the light-emitting elements at a uniform concentration.

The present invention generally relates to a field emission light source and specifically to a field emission light source adapted to emit ultraviolet (UV) light. The light source has a UV emission member provided with an electron-excitable UV emitting material. The material is at least one of LuPO.sub.3:Pr.sup.3+, Lu.sub.2Si.sub.2O.sub.2:Pr.sup.3+, LaPO.sub.4:Pr.sup.3+, YBO.sub.3:Pr.sup.3+ and YPO.sub.4:Bi.sup.3+.