A display apparatus includes a backplane substrate including driving elements, and a first light-emitting section, a second light-emitting section, and a third light-emitting section spaced apart from each other on the backplane substrate, the first light-emitting section being configured to emit light of a first wavelength, the second light-emitting section being configured to emit light of a second wavelength, and the third light-emitting section being configured to emit light of a third wavelength, where each of the first light-emitting section, the second light-emitting section and the third light-emitting section includes a p-type semiconductor layer, an active layer configured to emit blue light, and an n-type semiconductor layer stacked in a direction perpendicular to an upper surface of the backplane substrate.

A display device is disclosed. The display device may include a light-emitting element that outputs source light and a light control layer on the light-emitting element, which transmits the source light or converts the wavelength of the source light. The light-emitting element may include a first electrode, a second electrode facing (e.g., opposite to) the first electrode, at least one green light-emitting structure between the first electrode and the second electrode, and at least one blue light-emitting structure between the first electrode and the second electrode. The light control layer may include a green light control part including a green quantum dot that converts the wavelength of light emitted from the light-emitting element and emits green light. The power conversion efficiency of the green light control part may be less than about 32%, thereby being able to exhibit or provide excellent or suitable light efficiency and relatively high luminance characteristics.

A light emitting device is provided. The light emitting device includes a blue light unit, configured to emit blue light; a green light unit, configured to emit green light; a red light unit, configured to emit red light; and a warm white light unit, configured to emit warm white light. A dominant wavelength of the warm white light is in a range from 570 nm to 600 nm. A color coordinate of the warm white light unit and a color coordinate of the red light unit are respectively located at opposite sides of the Planckian locus. The blue light unit, the green light unit, the red light unit and the warm white light unit are configured to cooperate to emit mixed white light and are configured to adjust a color temperature of the mixed white light.

Phosphor ink compositions and systems and methods for depositing such phosphor containing ink are disclosed. An ink composition of in accordance with the present disclosure comprises a phosphor material comprising a Mn.sup.4+ doped phosphor of Formula 1 A.sub.x[MF.sub.y]:Mn.sup.4+ (I) and at least one binder material or solvent, wherein the Mn.sup.4+ doped phosphor has a D50 particle size from about 0.5 microns to about 15 microns, and wherein the ink composition has a viscosity from more than 2,000 cP to about 30,000 cP, where A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the [MF.sub.y] ion; and y is 5, 6 or 7.

A display device according to an embodiment includes a display panel, and a color conversion layer disposed on the display panel, wherein the color conversion layer includes a quantum dot and a scatterer, the scatterer includes a first particle having a first diameter, and the first diameter is from about 100 nm to about 180 nm.

The invention provides a light generating system (1000) comprising (a) a plurality of sets (150) of light generating devices (100) and (b) a luminescent material (200), wherein the light generating devices (100) are configured in an array (40); wherein the light generating devices (100) are configured to generate device light (101); wherein the light generating devices (100) comprise solid state light sources; wherein the plurality of sets (150) of light generating devices (100) comprises at least three sets (50) of light generating devices (100), wherein light generating devices (100) of different sets mutually differ in peak wavelengths of the device light (101), wherein a first set of first light generating devices (110) is configured to provide first device light (111) having a first peak wavelength (1) in the visible wavelength range, especially the blue wavelength range, a second set of second light generating devices (120) is configured to generate second device light (121) having a second peak wavelength (2) in the UV wavelength range or in the violet wavelength range, and a third set of third light generating devices (130) is configured to generate third device light (131) having a third peak wavelength (3) in the UV wavelength range or in the violet wavelength range; wherein the luminescent material (200) is configured downstream of the array (40) of light generating devices (100); wherein the luminescent material (200) is configured to convert at least part of the first device light (101) into luminescent material light (201); and wherein the luminescent material (200) is configured to convert at least part of the second device light and/or at least part of the third device light (101) into luminescent material light (201); wherein the luminescent material (200) has different excitation intensities at the different peak wavelengths (1, 2, 3); wherein the light generating devices (100) of the at least three sets (50) are configured according to increasing or decreasing excitation intensities of the luminescent material (200) for the different excitation intensities at the different peak wavelengths.

A display device includes a light emitting element layer including first light emitting elements, second light emitting elements, and third light emitting elements, a partition wall member disposed on the light emitting element layer, and including first receiving openings, second receiving openings, and third receiving openings, first color conversion layers disposed in the first receiving openings, second color conversion layers disposed in the second receiving openings, scattering layers disposed in the third receiving openings, a cover layer, and the scattering layers, and a color filter layer including a first color filter layer including a first color filter material, a second color filter layer including a second color filter material, and a third color filter layer including a third color filter material. The partition wall member includes a first partition wall member including the first color filter material, and a second partition wall member including the second color filter material.

A curable composition, a cured layer produced using the curable composition, and a display device including the cured layer are provided. The curable composition includes: (A) a quantum dot including a first functional group represented by Chemical Formula 1 and a second functional group having a different structure from the first functional group; and (B) a polymerizable compound.

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A display device includes a lower substrate, an upper substrate and a filling layer. The lower substrate includes a light-emitting diode layer, a color control layer and a spacer. The light-emitting diode layer includes light-emitting diodes. The color control layer includes a bank including an opening and a color control portion disposed in the opening. The spacer is disposed on the bank. The color control portion includes a quantum dot. The upper substrate is disposed on the lower substrate and includes color filters. The filling layer is disposed between the lower substrate and the upper substrate to adhere the lower substrate with the upper substrate. The filling layer has a higher refractive index than a refractive index of the spacer.

A light emitting device comprises: a plurality of light emitters; a plurality of light propagating units, each being associated with a group of light emitters and comprising: a waveguide for coupling in light from different light emitters at different locations of an in-coupling end, wherein the waveguide is a multimode waveguide for propagating light in dependence of the characteristics of the light for combining the light emitted by the light emitters at a transmitting end; a funnel element with a smaller cross-section at a receiving end than at an output end, wherein the receiving end is arranged to couple the light at the transmitting end into the funnel element for propagating the light to the output end for output of emitted light being a combination of light of the different characteristics.