Lg Display Co., Ltd.

Jong-Hyeok Im

Do-Hyung Kim

Jae-Sung Lee

Hyoung-Su Kim

Hye-Seon Eom

Gyung-Min Kim

Doo-Hyun Yoon

The present disclosure discloses an organic light emitting display device. The organic light emitting display device includes a substrate, a driving transistor, a reflection electrode, a dielectric layer, a first and second electrode, and an organic light emitting layer. The driving transistor is in each of a plurality of pixel regions which are defined on the substrate. The reflection electrode is on the driving transistor, and is electrically connected to a gate electrode of the driving transistor. The dielectric layer is on the reflection electrode. The first electrode is on the dielectric layer, and is electrically connected to a source electrode of the driving transistor, and faces the reflection electrode. The organic light emitting layer is on the first electrode. The second electrode is on the organic light emitting layer.

Organic light emitting display device including reflection electrode and first electrode with dielectric layer therebetween

Disclosed is an organic light-emitting display device configured such that the undercut shape of an auxiliary electrode is improved and such that a region where the auxiliary electrode and a second electrode contact is filled with an inorganic film, whereby a gap is prevented from being formed and the reliability of the organic light-emitting display device is improved. The organic light-emitting display device includes a first electrode located on a substrate defined by an active area and a non-active area, an organic layer including an emissive layer located on the first electrode, a second electrode located on the organic layer, an auxiliary electrode located in the non-active area, and a passivation layer located on the auxiliary electrode, the passivation layer having a reverse taper-shaped end so as to be exposed to the side surface of the auxiliary electrode. The second electrode extends to the non-active area so as to be electrically connected to the exposed auxiliary electrode. In addition, the auxiliary electrode has a taper-shaped end under the passivation layer.

Organic light-emitting display device having an undercut in the opening for the electrical connection to an auxiliary electrode

Disclosed is an organic light-emitting display device that is capable of preventing the reflection of light incident from outside and improving transparency when a transparent display is realized. The organic light-emitting display device includes a first substrate defined by a transmission area and a light emission area, a first electrode located on a region of a planarization film, which covers a thin film transistor, corresponding to the light emission area, the first electrode being electrically connected to the thin film transistor, and a shielding layer located to cover a region of the planarization film corresponding to the transmission area and the side surface of the planarization film, the shielding layer being electrically isolated from the first electrode. A black bank is provided between the transmission area and the emission area so as to cover the edge of the first electrode, and an organic light emissive layer and a second electrode, which covers the organic light emissive layer, are sequentially formed on the first electrode.

Organic light-emitting display device

An organic light emitting display device secures an auxiliary electrode with a sufficient area without forming a passivation layer, an additional planarization film, an additional connection electrode and an auxiliary electrode. Accordingly, manufacturing of a top-emission organic light emitting display device may use three to four fewer masks, thus advantageously simplifying the process and reducing manufacturing costs, the thickness of the organic light emitting display device and the resistance of the second electrode.

Growing community of inventors

Busan, South Korea

Jong-Hyeok Im