Light-emitting device

摘要

A light-emitting device includes a substrate, and a plurality of light-emitting elements that are mounted on the substrate and each emit light within a same color region. The plurality of light-emitting elements satisfy at least one of a first condition and a second condition. The first condition is that a maximum deviation in peak wavelength of light emitted from the plurality of light-emitting elements is not less than 1.25 nm. The second condition is that a maximum deviation in threshold voltage of the plurality of light-emitting elements is not less than 0.05 V.

主权项

1. A light-emitting device, comprising:
a package comprising a single concave portion; a plurality of light-emitting elements that are mounted inside the single concave portion of the package and each emits light such that a peak wavelength of the light emitted from said each of the light-emitting elements is in a same range of wavelengths of colors, the plurality of light-emitting elements comprising a first light-emitting element and at least a second light-emitting element; a sealing material filled in the single concave portion; and a reflector disposed on the package to reflect the light emitted from the plurality of light-emitting elements, in a cross-sectional-view, the single concave portion extending between adjacent side surfaces of the reflector such that, in the cross-sectional view, said each of the light-emitting elements is disposed between said adjacent side surfaces of the reflector, wherein the plurality of light-emitting elements satisfy at least one of a first condition and a second condition, wherein the first condition is that a maximum deviation in a peak wavelength of light emitted from the plurality of light-emitting elements is not less than 1.25 nm, such that a mean value of a peak wavelength of light emitted from the first light-emitting element is greater than a mean value of the peak wavelength of the light emitted from the plurality of light-emitting elements not less than 1.25 nm, and a mean value of a peak wavelength of light emitted from the at least second light-emitting element is less than the mean value of the peak wavelength of the plurality of light-emitting elements not less than 1.25 nm, and wherein the second condition is that a maximum deviation in threshold voltage of the plurality of light-emitting elements is not less than 0.05 V, such that a mean value of a threshold voltage of the first light-emitting element is greater than a mean value of the threshold voltage of the plurality of light-emitting elements not less than 0.05 V, and a mean value of a threshold voltage of the at least second light-emitting element is less than the mean value of the threshold voltage of the plurality of light-emitting elements not less than 0.05 V.