A display, in a micro light-emitting diode (LED) display, is provided. The display includes a barrier rib forming a pixel area, a micro LED disposed in the pixel area, a light-blocking portion defining an open area of the pixel area, a quantum dot color converter layer formed in the pixel area, and a color filter layer disposed to correspond to the quantum dot color converter layer, wherein an area of the pixel area is formed larger than an area of the open area, and wherein a first gap between pixel areas adjacent in a first direction is formed narrower than a second gap between pixels adjacent in a second direction that is perpendicular to the first direction.

A light-emitting device includes a substrate; light-emitting elements on an upper surface of the substrate, the light-emitting elements configured to be individually driven; a first wavelength conversion portion covering at least a portion of at least one of the light-emitting elements; a second wavelength conversion portion covering a part of the first wavelength conversion portion; and a diffusion portion covering the first and second wavelength conversion portions. In a cross-sectional view, the light-emitting device includes a first region in which the diffusion portion is arranged above the first wavelength conversion portion without the second wavelength conversion portion between them, and a second region in which the second wavelength conversion portion and the diffusion portion are sequentially arranged on the first wavelength conversion portion. A color temperature of light extracted from the second region is lower than a color temperature of light extracted from the first region.

The present disclosure provides an optoelectronic device including a base, a light-emitting chip, an interposer, a wavelength conversion member and a wall portion. The base includes a base portion and a conductive portion, and the conductive portion comprises a plurality of coupling surfaces. The base portion covers the conductive portion and exposes the coupling surfaces. The light-emitting chip and the interposer are provided on the base, and having a top surface. The interposer covers the light-emitting chip and exposes the top surface. The wavelength conversion member covers the light-emitting chip and the interposer, and the wavelength conversion member includes an emitting surface. The wall portion is provided on the base. The wall portion covers the interposer and the wavelength conversion member, and exposes the emitting surface of the wavelength conversion member. The emitting surface is parallel to the top surface, and perpendicular to the coupling surfaces.

A method of forming a light emitting device includes providing a free standing support containing a matrix material including first and second vias, depositing in the first vias a first photocurable quantum dot ink including first quantum dots suspended in a first photocurable polymer, illuminating the first photocurable quantum dot ink with ultraviolet radiation or blue light from first LEDs of an array of LEDs to crosslink the first photocurable polymer material in the first vias, depositing in the second vias a second photocurable quantum dot ink comprising second quantum dots suspended in a second photocurable polymer material, illuminating the second photocurable quantum dot ink with ultraviolet radiation or blue light from second LEDs of the array of LEDs to crosslink the second photocurable polymer material in the second vias, and attaching the free standing support to the array of LEDs after the illuminating.

Disclosed are a micro-display chip and a preparation method thereof. The micro-display chip includes: a self-luminescence layer, a wavelength conversion layer, and a first transmitting-and-reflecting layer and/or a second transmitting-and-reflecting layer; the first transmitting-and-reflecting layer is disposed between the self-luminescence layer and the wavelength conversion layer; the second transmitting-and-reflecting layer is disposed on another surface of the wavelength conversion layer; the first transmitting-and-reflecting layer has low reflectivity and high transmissivity for the first color light and high reflectivity and low transmissivity for the second color light, and the second transmitting-and-reflecting layer has high reflectivity and low transmissivity for the first color light and low reflectivity and high transmissivity for the second color light. The micro-display chip of the present disclosure can effectively improve the absorbance and color purity of conversion light, thereby obtaining a brighter and purer conversion spectrum.

Provided is a display panel. The display panel includes a base substrate, a light-emitting layer, a package layer, and a light conversion layer that are successively stacked. The light conversion layer includes a plurality of light conversion units arranged in an array and a plurality of micro-mirror structures. The plurality of light conversion units include a plurality of first light conversion units, and the plurality of micro-mirror structures include a plurality of first micro-mirror structures surrounding the first light conversion units. Each of the first micro-mirror structures is configured to reflect at least a portion of light from an interior of each of the first light conversion units.

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 light-emitting device includes: a substrate; light-emitting elements disposed on an upper surface of the substrate and configured to be individually driven; a wavelength conversion part covering upper and lateral surfaces of each of the light-emitting elements; a first light-shielding part located on a lower surface side of each of the light-emitting elements and a lower surface side of the wavelength conversion part; and a second light-shielding part. At least one groove is provided in the wavelength conversion part and the first light-shielding part such that a groove of the at least one groove is located between adjacent ones of the light-emitting elements. The second light-shielding part is provided within the at least one groove. In a cross-sectional view, a width of the second light-shielding part increases as a distance from the substrate increases, and the second light-shielding part is exposed at an upper surface of the wavelength conversion part.

A transparent structure attached to a phosphor-converted LED (pcLED) is disclosed. The transparent structure increases total light output of the pcLED without further increasing the light emitting area of the phosphor layer which becomes challenging and unreliable for thin phosphor layers.

A display panel is disclosed. The display panel comprises: a substrate divided into a plurality of pixel areas; a plurality of main light-emitting elements and an auxiliary light-emitting element mounted in each of the plurality of pixel areas; and a color conversion layer stacked on the plurality of main light-emitting elements and the auxiliary light-emitting element, wherein the color conversion layer is configured such that light emitted from the auxiliary light-emitting element passes through the color conversion layer and, as a result, has a first color corresponding to a defective first main light-emitting element among the plurality of main light-emitting elements.