Samsung Sdi Co., Inc.

Samsung Mobile Display Co., Ltd.

Dae Chul Choi

Byoung Deog Choi

Choong Youl Im

An organic light emitting display device including: a substrate having a pixel region and a non-pixel region; a first buffer layer and a second buffer layer formed over the substrate; a thin film transistor formed over the second buffer layer; an organic light emitting device formed in the pixel region and electrically connected with the thin film transistor; and a photo diode formed in the non-pixel region, for receiving external light of red wavelength at a certain absorption rate, and for controlling brightness of the organic light emitting device. Here, the first buffer layer can be formed to be from 2900 &#x212b; to 3100 &#x212b; in thickness, the second buffer layer can be formed to be from 200 &#x212b; to 400 &#x212b; in thickness, and the photo diode can include: an N-type doping region, a channel region being from 3 to 10 &#x3bc;m in width, and a P-type doping region.

Organic light-emitting display device including a photo diode

A thin film transistor (TFT) and a method of fabricating the same, in which a fabrication process is simplified and damage to a gate insulating layer is decreased. The method of fabricating the TFT includes forming at least one buffer layer on a substrate, forming a first semiconductor layer formed on the buffer layer and a second semiconductor layer by depositing a semiconductor doped with a dopant on the first semiconductor layer, patterning the second semiconductor layer to form source and drain regions, forming a gate insulating layer on the source and drain regions, and forming a gate electrode on the gate insulating layer.

Growing community of inventors

Seoul, South Korea

Dae Chul Choi