A mask assembly, an apparatus for manufacturing a display device, and a method of manufacturing a display device are provided. A mask assembly includes: a mask frame including a frame body portion and dividers, the frame body portion being arranged at an outside of the mask frame, and the dividers dividing an inside of the frame body portion into a plurality of openings, each of the dividers being connected in a first direction and a second direction; and a plurality of mask sheets arranged on a top surface of the mask frame, coupled to the mask frame, and including at least one pattern opening, mask sheets of the plurality of mask sheets being apart from each other in the first direction.

The present disclosure relates to a display device which includes: a substrate; a semiconductor layer disposed on the substrate and including a driving transistor and a second transistor each of which including a channel, a first region, and a second region; a first gate insulating layer disposed on the semiconductor layer, a gate electrode of the second transistor disposed on the first gate insulating layer and overlapping the channel of the second transistor; a second gate insulating layer disposed on the gate electrode of the gate electrode of the second transistor; and a gate electrode of the first driving transistor disposed on the second gate insulating layer and overlapping the channel of the driving transistor.

A display device includes a transmission area in a display area and includes a groove in a non-display area surrounding the transmission area and may minimize the occurrence of defective pixels because a groove forming process includes a process of forming a protection layer covering an emission area before formation of a mask layer and a process of removing the protection layer after removal of the mask layer.

A display device includes a substrate, an active pattern on the substrate and including a first region, a second region spaced apart from the first region, and a third region between the first region and the second region, a first conductive pattern layer on the active pattern and including a first dummy portion overlapping the third region of the active pattern and a first conductive pattern which is spaced apart from the first dummy portion, and a plurality of second conductive patterns on the first conductive pattern layer, where the first dummy portion of the first conductive pattern layer is electrically insulated from the plurality of second conductive patterns and the active pattern.

A display panel including a substrate having a central area and a corner area including a central corner area including a plurality of extension areas and a first adjacent corner area adjacent to the central corner area, a plurality of display elements including a first display element arranged in the plurality of extension areas and a second display element and a third display element arranged in the first adjacent corner area, and an organic pattern surrounding each of the first display element, the second display element, and the third display element. Ends of the plurality of adjacent extension areas are spaced apart from each other by a first penetration area, and an end of the central corner area and an end of the first adjacent corner area that are adjacent to each other are spaced apart from each other by a second penetration area.

A display device is disclosed that includes a substrate, a semiconductor layer, a first conductive layer, and a first gate insulating layer. The semiconductor layer is disposed on the substrate and includes a first area and a second area. The first conductive layer is disposed on the semiconductor layer and includes a first gate pattern overlapping the first area and a second gate pattern overlapping the second area. The first gate insulating layer is disposed between the semiconductor layer and the first conductive layer and includes a first insulating layer overlapping the first area and the second area, a second insulating layer overlapping the first area and the second area, and a third insulating layer not overlapping the first area but overlapping the second area. The second insulating layer is disposed between the first insulating layer and the third insulating layer, and has a dielectric constant greater than that of the third insulating layer.

A light emitting display device includes a substrate, a transistor, an insulating layer, a pixel electrode, an extension electrode, and a pixel defining layer. The transistor overlaps the substrate. The insulating layer overlaps the transistor. The pixel electrode is disposed on a face of the insulating layer. The extension electrode extends from the pixel electrode. The pixel electrode is electrically connected through the extension electrode to the transistor. The pixel defining layer is disposed on the insulating layer and includes an opening that exposes the pixel electrode, and covers the extension electrode. A section of the extension electrode extends lengthwise parallel to the face of the insulating layer and is thicker than the pixel electrode in a direction perpendicular to the face of the insulating layer.

A pixel having an organic light emitting diode (OLED) and method for fabricating the pixel is provided. A planarization dielectric layer is provided between a thin-film transistor (TFT) based backplane and OLED layers. A through via between the TFT backplane and the OLED layers forms a sidewall angle of less than 90 degrees to the TFT backplane. The via area and edges of an OLED bottom electrode pattern may be covered with a dielectric cap.

A flexible array substrate, a manufacturing method thereof and a display device are provided. The flexible array substrate includes: a first flexible substrate with a first surface; a thin film transistor on the first surface; and a light-shielding layer between the first flexible substrate and the thin film transistor. An orthographic projection of the light-shielding layer on the first flexible substrate covers an orthographic projection of a channel region of the thin film transistor on the first flexible substrate.

Disclosed is a display device including: a substrate; a first insulating film over the substrate, the first insulating film exposing a part of the substrate to provide an exposed surface to the substrate; a second insulating film in contact with the exposed surface and a first side surface of the first insulating film; and a first wiring over the second insulating film and in contact with the exposed surface, the first insulating film, and the second insulating film. The display device may further possess a third insulating film spaced from the second insulating film and in contact with the exposed surface. The first insulating film has a second side surface opposing the first side surface through the exposed surface. The third insulating film may be in contact with the second side surface, and the wiring may be located over and in contact with the third insulating film.