A display device includes: a base substrate having a plurality of first areas and a second area adjacent to the plurality of first areas; an organic layer on the base substrate and having a groove therein corresponding to the second area; a first electrode on the organic layer and overlapping one first area from among the plurality of first areas; a first charge transport layer on the first electrode and having an edge part facing a partial region of an inner lateral surface of the organic layer that defines the groove; an emission layer covering the first charge transport layer; a second charge transport layer covering the emission layer and including an inorganic material;

and a second electrode covering the second charge transport layer and overlapping a bottom surface of the organic layer defining the groove.

According to one embodiment, a display device comprises a first lower electrode, a rib including a first pixel aperture, a partition including a lower portion on the rib and an upper portion protruding from a side surface of the lower portion, a first upper electrode, and a first organic layer between the first lower electrode and the first upper electrode. The lower portion includes a bottom layer and a stem layer on the bottom layer. The bottom layer is formed of a material which has a smaller etching rate to a mixed acid containing phosphoric acid, nitric acid, and acetic acid than the stem layer and which is conductive.

A display device includes a substrate including a display area having first color subpixels and a transparent area inside the display area, an array layer in the display area on the substrate, a first electrode in the first color subpixels on the array layer, a first emission assisting layer on the first electrode, an emitting material layer in the first color subpixels on the first emission assisting layer, a second emission assisting layer on the emitting material layer, a deposition preventing layer in the transparent area on the second emission assisting layer, a second electrode on the second emission assisting layer, the second electrode selectively disposed in a region where the deposition preventing layer is not disposed, an encapsulating layer on the deposition preventing layer and the second electrode, a polarizing layer in the display area on the encapsulating layer, an auxiliary equipment in the transparent area under the substrate.

According to one embodiment, a display device comprises a first lower electrode, a rib including a first pixel aperture, a partition including a lower portion on the rib and an upper portion protruding from a side surface of the lower portion, a first upper electrode, and a first organic layer between the first lower electrode and the first upper electrode. The lower portion includes a bottom layer and a stem layer on the bottom layer. The bottom layer is formed of a material which has a smaller etching rate to a mixed acid containing phosphoric acid, nitric acid, and acetic acid than the stem layer and which is conductive.

An organic light-emitting diode display panel is disclosed. By using four display panels sequentially disposed in a stack arrangement from top to bottom, light emitted in a same direction from each of the display panels, and subpixels of the four display panels not overlapping one another, a screen resolution of the organic light-emitting diode display panel can increase by three times without increasing pixel density of masks or density of array layers.

Disclosed herein is a display device including a touch screen. An organic light emitting diode (OLED) display device including a touch screen according to an exemplary embodiment of the present invention includes: a plurality of pixels including organic light emitting bodies; and a common electrode which applies a common voltage to the organic light emitting body, in which a plurality of touch sensors and a plurality of sensor lines are formed in a mesh pattern in a partial region of the common electrode corresponding to a boundary region between the organic light emitting bodies. Further, the present invention includes exemplary embodiments different from the described exemplary embodiment.

There is provided an organic EL display device having a first subpixel region and a second subpixel region. The organic EL display device includes a first light emission film, a second light emission film, an upper electrode, a cap layer configured to include a high refractive index film, a middle refractive index film, and a low refractive index film whose refractive indices are different from one another on an upper layer side of the upper electrode, and the low refractive index film is disposed to be distant from the substrate more than the other films included in the cap layer are, in the first and second subpixel regions. The middle refractive index film of the first subpixel region is formed to be thicker than the middle refractive index film of the second subpixel region.

Provided is a compensation method of a cathode voltage drop of an OLED display device and a pixel driving circuit. The first pixel driving circuits having function of detecting the cathode voltage are arranged in a portion of sub pixels of the OLED display device and uses the first pixel driving circuits to detect the cathode voltages of these sub pixels. The cathode voltages inputted to all the sub pixels of the OLED display device are obtained by interpolation according to the detected cathode voltages of these detecting sub pixels. Then, the cathode voltage compensation look up table is obtained according to the cathode voltages of all the sub pixels of the OLED display device. Finally, the data signal voltage is compensated with the cathode voltage compensation look up table. The data signal voltage after compensation is used to drive the OLED display device to perform image display.

The disclosure provides a method for manufacturing cathode isolation retaining walls, display panel and manufacturing method thereof. A method for manufacturing a cathode isolation retaining wall, including exposing a first photoresist layer formed on an anode layer to obtain a first isolation retaining wall portion. The method includes forming a second photoresist layer on a side of the first photoresist layer away from the anode layer. After exposing the second photoresist layer, a second isolation retaining wall portion at least partially stacked with the first isolation retaining wall portion is obtained. The method includes developing the first photoresist layer and the second photoresist layer to obtain a cathode isolation retaining wall composed of the first isolation retaining wall portion and the second isolation retaining wall portion.

A display device includes a base layer on which a display area and a non-display area are defined, a circuit layer including a first power electrode and driving circuits, which are disposed in the non-display area, a first planarization layer in which a first opening through which the first power electrode is exposed is defined and which covers the driving circuits, a second power electrode disposed on the first planarization layer to contact the first power electrode that is exposed through the first opening and overlapping at least a portion of the driving circuits, and a second planarization layer disposed on the first planarization layer to cover a portion of the second power electrode and having a groove part in an area overlapping the first planarization layer and the second power electrode in a plan view.