Reducing sheet resistance for common electrode in top emission organic light emitting diode display

摘要

An organic light emitting diode display includes a thin film transistor (TFT) substrate, which has TFTs for an array of pixels. Each TFT has a gate electrode, a source electrode, and a drain electrode. An organic layer is disposed over the TFT substrate. The organic layer has through-hole above the drain electrode. The display also includes pixel electrodes disposed over the organic layer. Each pixel electrode is connected to the drain electrode in the through-hole of the organic layer for each pixel. An organic light emitting diode (OLED) layer is disposed over the pixel electrode for each pixel. The organic light emitting layer is divided into pixels or sub-pixels by a pixel defining layer over the pixel electrode. The display further includes a common electrode and a conductive layer disposed over the OLED layer such that the conductive layer does not block light emission from the organic light emitting layer.

主权项

1. An organic light emitting diode display comprising:
a thin film transistor (TFT) substrate, the TFT substrate having a plurality of TFTs for an array of pixels, each TFT having a gate electrode, a source electrode, and a drain electrode; an organic layer disposed over the TFT substrate, the organic layer having a through-hole above each drain electrode; a plurality of pixel electrodes disposed over the organic layer, each pixel electrode being connected to the drain electrode in the through-hole of the organic layer for each pixel; an organic light emitting diode (OLED) layer with first and second opposing sides disposed over the pixel electrode for each pixel, the organic light emitting diode layer being divided into a plurality of pixels by a pixel defining layer (PDL) over the pixel electrode; and a common electrode and a conductive layer disposed over the organic light emitting diode layer such that the conductive layer does not block light emission from the organic light emitting diode layer, wherein each pixel electrode is in direct contact with the first side of the organic light emitting diode layer, wherein the second side of the organic light emitting diode layer is in direct contact with the common electrode, and wherein the conductive layer is in direct contact with the common electrode.