Provided are a display panel and a display device. The display panel includes a pixel driver circuit. The pixel driver circuit includes a light-emitting module, a drive transistor and at least one light-emitting control transistor. The drive transistor, the light-emitting control transistor and the light-emitting module are connected in series between a first power supply signal terminal and a second power supply signal terminal, and at least one of the drive transistor or the light-emitting control transistor is a first double-gate transistor. The first double-gate transistor includes a first gate, a second gate and a first source, and the second gate is electrically connected to the first source.

Displays, systems, and methods may be utilized in applications including, but not limited to, projectors, head-up displays, and augmented reality (AR), mixed reality (MR), and virtual reality (VR) systems or devices, such as headsets or other near-eye devices or systems. Tiled or Tile-able displays and methods, in accordance with the present invention, provide displays of varying sizes, and as such, a Tiled or Tile-able display is configured to accommodate the display size needed for various wearable and mobile devices that require or incorporate displays.

A display apparatus includes a circuit substrate with driving circuits and first bonding electrodes, and a pixel array having LED cells, each of the LED cells including first and second conductivity-type semiconductor layers with an active layer therebetween, second bonding electrodes on the first bonding electrodes, wavelength converters on the LED cells, an upper semiconductor layer on the LED cells and having a partition structure surrounding side snakes of the wavelength converters and separating the wavelength converters, a first reflective electrode on the side surfaces of the LED cells, spaced from the LED cells by a passivation layer, and extending between the LED cells, second reflective electrodes on the lower surfaces of the LED cells and connected to the second conductivity-type semiconductor layers, a common electrode on at least one side of the LED cells, and a pad electrode outside the LED cells and electrically connected to the driving circuits.

A display device includes light-emitting elements arranged on a circuit board, and extending in a thickness direction of the circuit board, wherein the light-emitting elements include a first light-emitting element configured to emit a first light, and a second light-emitting element configured to emit a second light, wherein the first light-emitting element and the second light-emitting element are on different layers, and wherein a width of the first light-emitting element is greater than a width of the second light-emitting element.

A display device may include a substrate including a display area and a non-display area; pixels disposed in the display area; first and second driving voltage lines disposed in the non-display area and spaced apart from each other; a first fan-out line disposed in the non-display area and electrically connected to the first driving voltage line; a second fan-out line disposed in the non-display area and electrically connected to the second driving voltage line; a first power line including at least two first sub-power lines branching off to a corresponding one of the pixels from the first fan-out line; and a second power line including at least two second sub-power lines branching off to a corresponding one of the pixels from the second fan-out line.

Discussed is a display device including a substrate, a plurality of first assembling wires on the substrate, a plurality of second assembling wires on the substrate, and separated from the plurality of first assembling wires; a first insulating layer disposed on the substrate, wherein a first hole is located on each of the plurality of second assembling wires, respectively, and wherein the first hole is not located on each of the plurality of first assembling wires; and a semiconductor light emitting device in the first hole.

A display device includes a substrate, an emission structure disposed on the substrate, a first refraction pattern disposed on the emission structure, a second refraction pattern disposed on the first refraction pattern and covering the first refraction pattern, where the second refraction pattern includes an inorganic material, and a third refraction pattern disposed on the second refraction pattern and having a refractive index less than a refractive index of the first refraction pattern.

A circuit board for a light-emitting diode assembly according to an embodiment includes a substrate layer, dimming zones formed on one surface of the substrate layer, each of the dimming zones comprising a predetermined number of LED landing pads, and a wiring bundle disposed between the dimming zones neighboring in a row direction to extend in a column direction, the wiring bundle including wirings connected to the LED landing pads at the same level.

A display device including a display area and a non-display area, an inorganic insulating layer disposed on a substrate, the inorganic insulating layer disposed in the display area and the non-display area, pixels disposed on the substrate and overlapping the inorganic insulating layer in a plan view, the pixels disposed in the display area, and an organic insulating layer disposed on the substrate and overlapping the inorganic insulating layer and the pixels in a plan view, the organic insulating layer disposed at least in the display area. The non-display area includes an organic layer-free area including at least one of a corner and an outer edge area of the display device. The organic insulating layer is disposed on a portion of the substrate so as to be disposed in an area except for the organic layer-free area.

A display device includes pixels including a first pixel and a second pixel sequentially disposed in a first direction, each including sub-pixels including a first electrode, a second electrode, and a light emitting element, a driving circuit including driving elements between the pixels, pixel lines connected to the pixels, and driving lines connected to the driving elements. The driving lines are in an area between the first pixel and the second pixel, and include a first driving line extending in a second direction intersecting the first direction in the area between the first pixel and the second pixel. First electrodes included in the sub-pixels of the first pixel and first electrodes included in the sub-pixels of the second pixel are spaced apart by a distance equal to or greater than a width of the first driving line in the first direction, and do not overlap the first driving line.