In an LED display device according to an embodiment of the present disclosure, the LED display device comprises a second pixel driving circuit on a substrate, an LED element attached to a region not overlapping the second pixel driving circuit, including a first LED element, a second LED element and a growth substrate, and providing a double light-emitting spectrum, an element fixing layer surrounding the LED element, a first pixel driving circuit on the element fixing layer, and an element protecting layer on the first pixel driving circuit. In addition, the first LED element is controlled by the first pixel driving circuit, and the second LED element is controlled by the second pixel driving circuit. Therefore, the LED display device provides a dual emission spectrum, can realized high luminance and high definition, and can prevent a pixel defect.

An electronic device includes a substrate, a pixel defining layer disposed on the substrate and at least three light-emitting units respectively disposed in a first opening, a second opening and a third opening of the pixel defining layer. The first opening and the second opening are arranged along a first direction, and the first opening and the third opening are arranged along a second direction. An included angle between an extending direction of a first long axis of the first opening and the first direction is greater than 45 degrees, an included angle between the extending direction of the first long axis and the second direction is less than 45 degrees, and an included angle between an extending direction of a third long axis of the third opening and the second direction is greater than 45 degrees.

A method for producing a semiconductor nanoparticle, a semiconductor nanoparticle, an electroluminescent device including the semiconductor nanoparticle, and a display device. In an embodiment, the method of an embodiment includes preparing a first semiconductor nanocrystal including zinc, tellurium, and selenium, wherein the preparing of the first semiconductor nanocrystal includes heating a first solution including a first zinc precursor, a first selenium precursor and a tellurium precursor in a first organic solvent at a reaction temperature to form a heated solution; and adding an additive to the heated first solution to produce the first semiconductor nanocrystal, wherein the additive includes a second selenium precursor and the additive does not include tellurium, and the semiconductor nanoparticle is configured to emit blue light.

A method for producing a semiconductor nanoparticle, a semiconductor nanoparticle, an electroluminescent device including the semiconductor nanoparticle, and a display device. In an embodiment, the method of an embodiment includes preparing a first semiconductor nanocrystal including zinc, tellurium, and selenium, wherein the preparing of the first semiconductor nanocrystal includes heating a first solution including a first zinc precursor, a first selenium precursor and a tellurium precursor in a first organic solvent at a reaction temperature to form a heated solution; and adding an additive to the heated first solution to produce the first semiconductor nanocrystal, wherein the additive includes a second selenium precursor and the additive does not include tellurium, and the semiconductor nanoparticle is configured to emit blue light.

A lighting system and method of driving an array of micro light emitter (microLED) pixels are disclosed. Each pixel contains a blue sub-pixel configured to emit blue light, a red sub-pixel configured to emit red light, a green sub-pixel configured to emit green light, and a yellow sub-pixel configured to emit yellow light. A processor selects, for each pixel to produce white light, between driving the blue sub-pixel and yellow sub-pixel to produce the white light and driving the blue sub-pixel, the red sub-pixel, the green sub-pixel, and the yellow sub-pixel to produce the white light.

A display device includes a display panel including a circuit layer and a light-emitting element layer. The circuit layer includes a transistor, a connection electrode electrically connecting the transistor and the light-emitting element layer, a data line, and an insulating layer provided with a contact hole defined therethrough. The light-emitting element layer includes a first electrode electrically connected to the connection electrode through the contact hole, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer. The first electrode includes a first portion, a second portion extending from the first portion to a first direction, a third portion extending from the first portion to the first direction, and a fourth portion protruded from one of the first, second, and third portions.

A display module includes a substrate and a plurality of pixels on the substrate. Each pixel of the plurality of pixels includes a self-luminescence layer, a first color conversion layer and a second color conversion layer on the self-luminescence layer, a first color filter and a second color filter on the first color conversion layer and the second color conversion layer, a third color filter adjacent to the first color filter and the second color filter, and a size of the third color filter is larger than a size of the first color filter and a size of the second color filter; and partition walls between the first color filter and the second color filter and between the second color filter and the third color filter, and blue dye on the partition walls.

A display module includes a substrate and a plurality of pixels on the substrate. Each pixel of the plurality of pixels includes a self-luminescence layer, a first color conversion layer and a second color conversion layer on the self-luminescence layer, a first color filter and a second color filter on the first color conversion layer and the second color conversion layer, a third color filter adjacent to the first color filter and the second color filter, and a size of the third color filter is larger than a size of the first color filter and a size of the second color filter; and partition walls between the first color filter and the second color filter and between the second color filter and the third color filter, and blue dye on the partition walls.

Provided is an LED comprised of a single mesa epitaxial stack structure with a set of three p-n junctions and having four electrical contact terminals. A polychromatic, multi/full-color emitting, LED chip is assembled with a backplane and has four electrical contact terminals. The polychromatic LED is transferrable and able to be integrated each individually or as a mass array.

A display panel is provided. The display panel includes a base substrate including a first display region, a second display region, and a transition region disposed between the first display region and the second display region; a first pixel unit disposed in the first display region, wherein the first pixel unit has a first aperture ratio; a second pixel unit disposed in the second display region, wherein the second pixel region has a second aperture ratio; and a third pixel unit disposed in the transition region, wherein the third pixel unit has a third aperture ratio; wherein the first aperture ratio is greater than the second aperture ratio; in a direction pointing from the first display region towards the second display region, the first aperture ratio, the third aperture ratio, and the second aperture ratio progressively decrease.