The invention relates to improved Organic Light Emitting Transistor (OLET) pixel architecture for OLET based displays.

An electroluminescent display device includes: a substrate, a first subpixel on the substrate, a second subpixel on the substrate, a third subpixel on the substrate, a respective first electrode in each of the first to third subpixels, an emission layer on the first electrodes, a common second electrode on the emission layer, an encapsulation layer including: a first encapsulation layer on the second electrode, and a second encapsulation layer on the first encapsulation layer, and a first semi-transmissive layer between the first encapsulation layer and the second encapsulation layer, the first semi-transmissive layer overlapping the first electrode of the first subpixel.

A display device includes a driving transistor and an organic EL element. The driving transistor includes an oxide semiconductor layer; a first gate electrode that includes a region overlapping the oxide semiconductor layer; a first insulating layer between the first gate electrode and the oxide semiconductor layer; a second gate electrode that includes a region overlapping the oxide semiconductor layer and the first gate electrode; a second insulating layer between the second gate electrode and the oxide semiconductor layer; and a first and a second transparent conductive layer that are provided between the oxide semiconductor layer and the first insulating layer and each include a region contacting the oxide semiconductor layer. The organic EL element includes a first electrode; a second electrode; a light emitting layer between the first electrode and the second electrode; and an electron transfer layer between the light emitting layer and the first electrode.

A light emitting display apparatus includes a substrate including a plurality of pixels each including an emission area; a light extraction pattern including a plurality of concave portions in the emission area; and a light emitting portion over the light extraction pattern, wherein at least one of the plurality of concave portions has a curvature of 0.217 μm.sup.−1 to 0.311 μm.sup.−1.

A display device includes a driving transistor and an organic EL element. The driving transistor includes an oxide semiconductor layer; a first gate electrode that includes a region overlapping the oxide semiconductor layer; a first insulating layer between the first gate electrode and the oxide semiconductor layer; a second gate electrode that includes a region overlapping the oxide semiconductor layer and the first gate electrode; a second insulating layer between the second gate electrode and the oxide semiconductor layer; and a first and a second transparent conductive layer that are provided between the oxide semiconductor layer and the first insulating layer and each include a region contacting the oxide semiconductor layer. The organic EL element includes a first electrode; a second electrode; a light emitting layer between the first electrode and the second electrode; and an electron transfer layer between the light emitting layer and the first electrode.

A display device includes: a substrate; a light-emitting element on the substrate; a planarization layer on the light-emitting element; a first refractive index layer on the planarization layer and including a total reflection inclination surface totally reflecting light emitted from the light-emitting element in a front direction and a refraction inclination surface refracting light emitted from the light-emitting element in the front direction; a second refractive index layer on the first refractive index layer to be in contact with the refraction inclination surface and having a smaller refractive index than a refractive index of the first refractive index layer; and a third refractive index layer on the first refractive index layer and the second refractive index layer to be in contact with the total reflection inclination surface and having a larger refractive index than the refractive index of the first refractive index layer.

The present application describes a display panel having a plurality of subpixels. Each of the plurality of subpixels has a light blocking region and a light transmissive region surrounding the light blocking region. Each of the plurality of subpixels in the light blocking region includes a first base substrate and a second base substrate facing each other; a first light emitting element and a first reflective block on a side of the first base substrate proximal to the second base substrate; and a second reflective block on a side of the second base substrate proximal to the first base substrate. The first reflective block and the second reflective block are configured to reflect light emitted from the first light emitting element to the light transmissive region thereby displaying an image.

A display device may include a window including a top surface, a bottom portion facing the top surface, and a side portion connecting the top surface to the bottom portion and the window including a transmission region and a light-blocking region, a light-blocking layer disposed below the window and overlapping the light-blocking region in a plan view, a light source spaced apart from the bottom portion in a direction in a plan view, and a display panel disposed below the window. The display panel may include a light sensing device, and may include a display region overlapping the transmission region.

Provided is an electronic device including a display panel including an active region, and a peripheral region at one side of the active region, and an input sensor including a sensing region above the active region, a sensing peripheral region above the peripheral region, and a line region above the active region and between the sensing region and the sensing peripheral region, wherein the input sensor includes sensing electrodes arranged in the sensing region, main lines arranged in the line region, and connected to the sensing electrodes, and reflection patterns arranged in the line region between the main lines.

Provided is a display device capable of curbing degradation of color purity.

The display device includes: a plurality of first electrodes that are two-dimensionally disposed; a second electrode that is provided to face first surfaces of the plurality of first electrodes; an electroluminescence layer that is provided between the plurality of first electrodes and the second electrode; an insulating layer that is provided between the adjacent first electrodes; and a plurality of reflective plates that are provided to second surfaces of the plurality of first electrodes, respectively. A plurality of resonator structures that resonate light emitted from the electroluminescence layer are configured of the second electrode and the plurality of reflective plates. The insulating layer includes a plurality of openings, and the openings are provided above the first surfaces of the first electrodes. The reflective plates include counter surfaces that face the electroluminescence layer via the first electrodes. In a case where regions corresponding to the openings in a plan view are defined as first regions, and regions corresponding to peripheral edge parts of the openings in the plan view are defined as second regions, a reflectance R1 on the counter surfaces in the first regions and a reflectance R2 on the counter surfaces in the second regions satisfy a relationship of R2<R1.