An organic light-emitting diode display apparatus includes a substrate. An organic light-emitting device is disposed on the substrate and includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode. A reflectance of the first electrode is greater than a reflectance of the second electrode. A thin-film transistor is disposed between the substrate and the first electrode and is connected to the first electrode. A first light reflective layer is connected to the thin-film transistor that is disposed between the substrate and the first electrode. A photo sensor is disposed in an outer area of the substrate and is configured to sense light reflected from the first light reflective layer.

An organic light emitting display device includes a substrate which is divided into an active area and a non-active area. An adhesive film and an encapsulation substrate are disposed above the substrate, and a dam is disposed in the non-active area between the substrate and the encapsulation substrate. The dam includes a polymer light emitting material that is transparent when irradiated with visible light but emits light when irradiated with ultraviolet light. Therefore, external appearance of the dam can be inspected and performance of the dam can be evaluated using ultraviolet rays.

The present invention relates to an organic monomolecular compound having an alkoxy functional group in a chemical structure comprising a quinoxaline-based compound and a triphenylphosphine oxide-based compound. Specifically, the invention provides an organic monomolecular compound represented by Formula 1, as well as a device comprising the compound and a method for manufacturing the device.

##STR00001## (In Formula 1, R is a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms.)

A quantum dot film, a method for preparing the same, and a quantum dot light emitting diode are provided. The method for preparing the quantum dot film includes: providing a substrate; and depositing a mixed solution containing a quantum dot and a high molecular polymer onto the substrate, and performing annealing treatment to obtain the quantum dot film. A temperature of the annealing treatment is greater than or equal to a glass transition temperature of the high molecular polymer. The preparation method can make the position of the quantum dot in the quantum dot film rearranged, such that the quantum dot is tightly accumulated and regularly arranged in the high molecular polymer, whereby forming a flat quantum dot film. The quantum dot film obtained from the preparation method, when applied to the quantum dot light emitting device, can significantly improve the electro-optical efficiency and lifespan of the device.

The present disclosure relates to an organic light-emitting layer having improved ion transport properties, an organic light-emitting synaptic device that may be driven at a low voltage, and a stimuli-responsive neuromorphic display device using the synaptic device capable of in-display signal processing that may receive signals from living body and environment and perform immediate visualization together with a bio-like signal processing process.