Patent ID: 8022622
Filing Date: 2011-09-20
Classification: H01L

Abstract:
1. An organic light emitting display device comprising: a substrate having a pixel region and a non-pixel region; a first buffer layer directly on the substrate and a second buffer layer directly on the first buffer layer; 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 directly on the second buffer layer and for receiving external light of red wavelength at a certain absorption rate, wherein the first buffer layer is made of a silicon oxide film and is formed to be from 2900 Å to 3100 Å in thickness, the second buffer layer is made of a silicon nitride film and is formed to be from 200 Å to 400 Å in thickness, and the photo diode comprises: an N-type doping region, a channel region being from 3 to 10 μm in width, and a P-type doping region.