The present disclosure relates to the field of display technology, and provides an OLED display substrate, a manufacturing method and a display device. The OLED display substrate includes: a base substrate; an active layer arranged on the base substrate; a gate insulation layer arranged at a side of the active layer away from the base substrate; and a gate electrode layer arranged at a side of the gate insulation layer away from the base substrate. An orthogonal projection of the gate electrode layer onto the base substrate at least partially overlaps an orthogonal projection of the active layer onto the base substrate, and the gate electrode layer and the active layer form a first storage capacitor of the OLED display substrate.

The present disclosure relates to the field of display technology, and proposes a display panel, a preparation method thereof, and a display apparatus. The display panel includes an array substrate, a planarization layer group, and a plurality of sub-pixels. The array substrate includes a switch array formed by a plurality of switch units. The planarization layer group is provided on the array substrate, and nano-scale grooves are provided on the planarization layer group. The sub-pixels are provided on a side of the planarization layer group away from the array substrate. The sub-pixel includes a plurality of first electrodes, wherein the first electrode is connected to the switch unit of the array substrate, a nano-scale second gap is provided between two adjacent first electrodes, and an orthographic projection of the second gap on the array substrate is located within an orthographic projection of the groove on the array substrate.

The present disclosure relates to the field of display technology, and proposes a display panel, a preparation method thereof, and a display apparatus. The display panel includes an array substrate, a planarization layer group, and a plurality of sub-pixels. The array substrate includes a switch array formed by a plurality of switch units. The planarization layer group is provided on the array substrate, and nano-scale grooves are provided on the planarization layer group. The sub-pixels are provided on a side of the planarization layer group away from the array substrate. The sub-pixel includes a plurality of first electrodes, wherein the first electrode is connected to the switch unit of the array substrate, a nano-scale second gap is provided between two adjacent first electrodes, and an orthographic projection of the second gap on the array substrate is located within an orthographic projection of the groove on the array substrate.

An organic EL device (100D) according to an embodiment of the present invention has: a substrate (1); a drive circuit layer (2) having a plurality of TFTs formed on the substrate; interlayer insulation layers (2Pa, 2Pb) formed on the drive circuit layer; an organic EL element layer (3) formed on the interlayer insulation layers; and a thin-film sealing structure (10DE) formed so as to cover the organic EL element layer. The interlayer insulation layers have contact holes (CH1, CH2). Contact parts (C1, C2) that connect the drive circuit layer and the organic EL element layer are formed inside the contact holes. The surface (2Pb_Sb) of the interlayer insulation layers and the surface (C_Sb) of the contact parts are flush, and the arithmetic average roughness Ra of the surfaces are 50 nm or less.

A display device includes: a base substrate including an opening area, an opening peripheral area, and a display area at least partially surrounding the opening peripheral area, wherein the opening peripheral area is a non-display area at least partially surrounding the opening area; a thin film transistor disposed on the base substrate in the display area; a via insulating layer disposed on the thin film transistor and having a first opening surrounding the opening area, wherein the first opening is in the opening peripheral area; a pixel defining layer disposed on the via insulating layer and having a first opening which overlaps the first opening of the via insulating layer; a transparent filler disposed on the base substrate in the opening area; and a sealing substrate disposed on the transparent filler.

A display device includes: a base substrate including an opening area, an opening peripheral area, and a display area at least partially surrounding the opening peripheral area, wherein the opening peripheral area is a non-display area at least partially surrounding the opening area; a thin film transistor disposed on the base substrate in the display area; a via insulating layer disposed on the thin film transistor and having a first opening surrounding the opening area, wherein the first opening is in the opening peripheral area; a pixel defining layer disposed on the via insulating layer and having a first opening which overlaps the first opening of the via insulating layer; a transparent filler disposed on the base substrate in the opening area; and a sealing substrate disposed on the transparent filler.

It is an object of the present invention to provide a light-emitting device where periphery deterioration can be prevented from occurring even when an organic insulating film is used as an insulating film for the light-emitting device. In addition, it is an object of the present invention to provide a light-emitting device where reliability for a long period of time can be improved. A structure of an inorganic film, an organic film, and an inorganic film is not continuously provided from under a sealing material under a cathode for a light-emitting element. In addition, penetration of water is suppressed by defining the shape of the inorganic film that is formed over the organic film even when a structure of an inorganic film, an organic film, and an inorganic film is continuously provided under a cathode for a light-emitting element.

A flexible display device including a substrate, a light emitting layer, a first insulating layer, and a conductive layer. The substrate includes a bent region and a non-bent region. The light emitting layer overlaps the non-bent region. The first insulating layer is disposed on the substrate. The conductive layer is disposed on the first insulating layer. A sidewall of the first insulating layer includes a first tapered surface. The first tapered surface includes at least three curved surface portions continuously arranged with one another.

A flexible display device including a substrate, a light emitting layer, a first insulating layer, and a conductive layer. The substrate includes a bent region and a non-bent region. The light emitting layer overlaps the non-bent region. The first insulating layer is disposed on the substrate. The conductive layer is disposed on the first insulating layer. A sidewall of the first insulating layer includes a first tapered surface. The first tapered surface includes at least three curved surface portions continuously arranged with one another.

A display device includes: a substrate; a display area in which a plurality of pixels are arranged over the substrate; and a transmission area arranged inside the display area, where the transmission area is provided to overlap a component below the substrate, and a transparent organic layer including siloxane is arranged in the transmission area.