Abstract: A display device includes: a driving module comprising a first substrate having pixel circuits; and a display module on the driving module, wherein the display module includes: a second substrate; a plurality of light emitting elements on a first surface of the second substrate and respectively connected to the plurality of pixel circuits; a plurality of vias penetrating the second substrate; and a plurality of anode connection electrodes respectively in the plurality of vias and connecting the plurality of pixel circuits to the plurality of light emitting elements, the via including a hole and a groove connected to each other, the hole penetrating the second substrate, the groove is on a second surface of the second substrate so as to be between the second substrate and the driving module, and the plurality of vias have grooves with smaller lengths and are closer to a center of the second substrate.

Abstract: A display device, an optical device and an electronic device each including the display device, and a method of manufacturing a display device are provided. The display device includes: a substrate; a first electrode on the substrate; a pixel defining film on the first electrode and defining an emission area; a light emitting stack on the first electrode; and a second electrode on the light emitting stack and the pixel defining film, wherein a taper angle of the first electrode is less than or equal to about 45 degrees.

Abstract: A display device includes a first electrode, a protective layer on the first electrode, a first pixel defining layer on the protective layer, a first void between the first electrode and the first pixel defining layer, a second pixel defining layer on the first pixel defining layer, a third pixel defining layer on the second pixel defining layer, a second void between the first pixel defining layer and the third pixel defining layer, and a light emitting structure on the first electrode, the first pixel defining layer, the second pixel defining layer, and the third pixel defining layer. A thickness of a first side of the first void is greater than a thickness of a second side of the first void.

Abstract: Provided is a display device including a first electrode, a first pixel defining film disposed on the first electrode, a second pixel defining film disposed on the first pixel defining film, a void formed between an end of the first pixel defining film and an end of the second pixel defining film, a light emitting structure disposed on the first electrode, the first pixel defining film, and the second pixel defining film, and a second electrode disposed on the light emitting structure, wherein a thickness of a first area of the first pixel defining film overlapping the void is thicker than a thickness of a second area of the first pixel defining film non-overlapping the void.

Abstract: The present disclosure relates to a display device capable of providing light of high luminance, and a method of fabricating the same. According to one or more embodiments, a display device includes a substrate, an anode electrode above the substrate, and including a first layer, a second layer on the first layer, a third layer on an upper surface and a side surface of the second layer, and a fourth layer connected to the first layer, and on an upper surface of the first layer, an upper surface of the third layer, and a side surface of the third layer, a light-emitting stack above the anode electrode, and a cathode electrode above the light-emitting stack.

Abstract: A display device includes a first electrode, a first pixel-defining layer above the first electrode, a third pixel-defining layer above the first pixel-defining layer, a void between the first pixel-defining layer and the third pixel-defining layer, a light-emitting structure above the first electrode, the first pixel-defining layer, and the third pixel-defining layer, including a first layer and a second layer, and having a first area above the first pixel-defining layer, and a second area above the third pixel-defining layer, a width of the first layer at the first area being greater than a width of the second layer at the first area, and a second electrode above the light-emitting structure.

Abstract: A display device includes a substrate, a pixel circuit layer above the substrate, anodes spaced apart from each other above the pixel circuit layer, a pixel-defining layer partially on the pixel circuit layer and the anodes, and at least one trench between the anodes, partially penetrating the pixel-defining layer and the pixel circuit layer, and having a width of about 70 nm or less.

Abstract: The present disclosure relates to a display device, a method for fabricating the same and a head mounted display device including the same. A display device includes: a substrate including a display area and a non-display area; first electrodes spaced from each other on the substrate in the display area; a power connection electrode on the substrate in the non-display area; a pixel defining film in the display area and the non-display area and including first openings overlapping the first electrodes, and a second opening overlapping the power connection electrode; light emitting stacks on the first electrode in the display area; and a second electrode on the pixel defining film and the light emitting stack, the pixel defining film includes a first pixel defining film, a second pixel defining film on the first pixel defining film, and a third pixel defining film on the second pixel defining film.

Abstract: A display device includes: a metal layer on a via layer, the metal layer overlapping with emission areas; a resonance auxiliary layer on the via layer and the metal layer, the resonance auxiliary layer exposing the metal layer; anode electrodes on the resonance auxiliary layer; and a contact layer connected to the metal layer and the anode electrodes.

Abstract: A display device includes a substrate including a first contact hole, an etching stopper disposed on a surface of the substrate and including the first contact hole, a metal pattern disposed on another surface opposite to the surface of the substrate and surrounding the first contact hole in a plan view, a first pad unit overlapping a part of the metal pattern and inserted into the first contact hole, a lead line disposed on the another surface of the substrate and electrically connected to another part of the metal pattern, a second pad unit disposed on the another surface of the substrate and electrically connected to the lead line, a protective film overlapping the another surface of the substrate and the lead line, and a protection part overlapping the first pad unit.

Abstract: In a method of manufacturing a display device, the method includes: providing a substrate; forming an anode electrode on the substrate; forming a first insulating layer on the anode electrode; forming a trench by etching the first insulating layer; forming a second insulating layer on the first insulating layer through a process different from that of the first insulating layer; exposing at least a portion of the first insulating layer overlapping the anode electrode by etching the second insulating layer; and exposing the anode electrode by concurrently etching the at least the portion of the first insulating layer and the second insulating layer.

Abstract: A display device and a method of manufacturing the same are provided. The display device includes: a pixel-circuit layer including a pixel circuit on a substrate; and a light-emitting-element layer on the pixel-circuit layer, wherein the light-emitting-element layer includes: an anode electrode; a pixel defining layer covering at least a portion of the anode electrode, the pixel defining layer forming a pixel defining opening exposing at least a portion of the anode electrode; a light emitting structure electrically connected to the anode electrode; and a cathode electrode electrically connected to the light emitting structure, wherein the pixel defining layer includes a rounded upper surface having a rounded corner, the rounded upper surface including an inclined side surface facing the pixel defining opening, and wherein an angle between the inclined side surface and a top surface of the anode electrode is in a range of 15 degrees to 45 degrees.

Abstract: A display device includes a display panel which displays an image, a cover window which is disposed on a first surface of the display panel, and a first sound generator which is disposed on a second surface opposite the first surface of the display panel and outputs sound by vibrating the display panel. The cover window includes a first lattice pattern area including lattice patterns surrounding the first sound generator in a plan view.

Abstract: A method of fabricating a deposition mask includes: preparing a silicon on insulator (SOI) substrate including an upper silicon substrate, a lower silicon substrate, and an insulating layer between the upper silicon substrate and the lower silicon substrate; forming a mask membrane having a plurality of openings by patterning the upper silicon substrate; forming a first protective layer on the upper silicon substrate and a second protective layer on the lower silicon substrate; forming a cell opening by patterning the lower silicon substrate; and removing the first protective layer and the second protective layer.

Abstract: A display device includes display devices each including a display area and a non-display area adjacent to the display area, the display area of each of the display devices including a pixel, and a substrate on which each of the display devices is disposed. Each of the display devices includes a thin film transistor layer disposed on the substrate and including a thin film transistor, and a connection line electrically connected to the thin film transistor and disposed in the non-display area on the substrate. Connection lines of display devices adjacent to each other among the plurality of display devices are disposed staggered with respect to each other.

Abstract: According to an embodiment, a display device may include a semiconductor wafer substrate, a complementary metal oxide semiconductor (CMOS) circuit layer disposed on the semiconductor wafer substrate, and a light emitting element layer disposed on the CMOS circuit layer. The light emitting element layer may include a pixel defining film partitioning a plurality of pixels, a pixel electrode disposed independently in each of the plurality of pixels, an aging wiring disposed between the plurality of pixels, a light emitting layer commonly covering the pixel electrodes of each of the plurality of pixels and the aging wiring, and a common electrode covering the light emitting layer. A portion positioned between the aging wiring and the common electrode of the light emitting layer may include an aged portion in which at least a portion of a conductive layer included in the light emitting layer is aged.

Abstract: A display device includes: a substrate comprising a first contact hole; a thin-film transistor layer on a first surface of the substrate and comprising a plurality of insulating layers and a thin-film transistor; an etching stopper on one or more of the insulating layers and contacting the substrate through a second contact hole surrounding the first contact hole in a plan view; a connection line on the etching stopper; and a pad part on a second surface of the substrate opposite the first surface of the substrate and connected to the connection line through the first contact hole.

Abstract: A tiled display device includes a plurality of display devices including a plurality of display areas including pixels, and a coupling area between adjacent display areas from among the plurality of display areas. Each of the plurality of display devices includes: a substrate including a first portion configured to support the display area, a second portion extending from the first portion to be bent, and a third portion extending from the second portion, a display layer on the first portion of the substrate and including the pixels, a connection line at an edge of the first portion of the substrate and connected to the plurality of pixels, a pad portion on the third portion of the substrate, a fan-out line on the second portion of the substrate and connected between the pad portion and the connection line, and pattern holes penetrating the second portion of the substrate.

Abstract: A flexible display device includes a first flexible substrate that includes a signal line formed on one side of the first flexible substrate. A second flexible substrate is disposed on a second side of the first flexible substrate that is located opposite to the first side of the first flexible substrate. An opening penetrates the first flexible substrate and the second flexible substrate. A driver is attached to the second flexible substrate. A connection portion electrically connects the driver and the signal line to each other through the opening.

Abstract: A display device includes: a substrate comprising a first contact hole; a thin-film transistor layer on a first surface of the substrate and comprising a plurality of insulating layers and a thin-film transistor; an etching stopper on one or more of the insulating layers and contacting the substrate through a second contact hole surrounding the first contact hole in a plan view; a connection line on the etching stopper; and a pad part on a second surface of the substrate opposite the first surface of the substrate and connected to the connection line through the first contact hole.