A display device includes a base substrate, a partitioning wall on the base substrate, wherein the partitioning wall includes a first partitioning wall, and a second partitioning wall on the first partitioning wall, and a light emitting element spaced from the partitioning wall and located in a space surrounded by the partitioning wall in a plan view. The first partitioning wall and the light emitting element include a same material. The second partitioning wall includes a transparent conductive oxide.

There is provided a display device including a substrate, a partition wall on the substrate, a light-emitting element on the substrate in a light-emitting area partitioned by the partition wall, and extending in a thickness direction of the substrate, a light conversion layer on the light-emitting element in the light-emitting area, and configured to convert a wavelength of light emitted from the light-emitting element or to transmit the light, and an optical member including an optical pattern on the partition wall, and an optical layer on the light conversion layer, wherein a refractive index of the optical layer and a refractive index of the optical pattern are different from each other.

A display device includes a substrate, a partition wall on the substrate, a light-emitting element in an emission area partitioned by the partition wall on the substrate, and extending in a thickness direction of the substrate, a wavelength conversion layer over the light-emitting element in the emission area, and including a base resin, and a scatterer dispersed in the base resin and that converts a wavelength of light emitted from the light-emitting element, a light-blocking member on the partition wall, and at least one optical pattern on the wavelength conversion layer in the emission area, and having an upwardly protruding shape.

A display device may include a plurality of light emitting elements on a substrate and arranged in a matrix form along a first arrangement direction and a second arrangement direction crossing the first arrangement direction, and a first sub pixel area and a second sub pixel area each overlapping at least a portion of the plurality of light emitting elements, spaced from each other in a first direction, and extending in a second direction crossing the first direction. The second direction and the first arrangement direction may be non-parallel to each other.

A display device includes a substrate; a partition wall on the substrate; a light-emitting element located in an emission area partitioned by the partition wall on the substrate and extended in a thickness direction of the substrate; a wavelength conversion layer over the light-emitting element in the emission area, and including a base resin and wavelength conversion particles dispersed in the base resin and configured to convert a wavelength of light emitted from the light-emitting element; and an optical member on the wavelength conversion layer and the partition wall and configured to adjust a path of light output from the wavelength conversion layer, and the optical member includes an optical layer and a first protruding pattern protruding from the optical layer toward the wavelength conversion layer.

A display device may include light emitting elements, a first electrode and a second electrode electrically connected to each of the light emitting elements, a pixel circuit electrically connected to at least one of the light emitting elements. The pixel circuit may be disposed in each of a plurality of pixel circuit areas that are disposed in a matrix form defined by a first direction and a second direction intersecting the first direction, a first contact portion and a second contact portion may be disposed in each of the plurality of pixel circuit areas, wherein the first contact portion electrically connects the pixel circuit and the first electrode, and the second contact portion electrically connects a common power line and the second electrode, and in a plan view, the first contact portion and the second contact portion may be alternately disposed along the first direction.

A display device may include a display element part disposed on a substrate and including a light emitting element, and a color conversion part disposed on the display element part and changing a wavelength of light emitted from the light emitting element. The color conversion part may include an insulating structure layer, a first partition wall structure layer, and a first wavelength conversion portion, the first partition wall structure layer may include first walls, and may be disposed between the insulating structure layer and the display element part, the first wavelength conversion portion may be disposed in a space defined by the first walls, and the first partition wall structure layer may include a silicon-based material.

A display device includes a backplane line disposed on a substrate, a protective layer overlapping the backplane line, a first electrode disposed on the protective layer, a light emitting element electrically connected to the first electrode, and a reflective pattern including a reflective material and disposed between the substrate and the first electrode, the reflective pattern overlaps the backplane line in a plan view.

A light-emitting element according to the disclosure includes an anode electrode, a cathode electrode, and a first light-emitting layer that includes a plurality of first quantum dots and emits light of a first color. The first light-emitting layer is provided between the anode electrode and the cathode electrode, and each of the plurality of first quantum dots includes a compound containing each of three elements of Zn, Se, and Te. A combination of an average particle size of the plurality of first quantum dots and a composition ratio of the three elements is selected such that the peak wavelength of a light emission spectrum of the first light-emitting layer is greater than 394 nm and equal to or less than 474 nm.

An LED pump light with multiple phosphors is described. LEDs emitting radiation at violet and/or ultraviolet wavelengths are used to pump phosphor materials that emit other colors. The LEDs operating in different wavelength ranges are arranged to reduce light re-absorption and improve light output efficiency.