Patent ID: 6916221
Filing Date: 2005-07-12
Classification: H01L

Abstract:
1. A method of determining defects in OLED devices having a plurality of pixels, each with its own emissive layer, which are capable of being excited by input light to produce an output color light response, comprising the steps of: a) illuminating one or more OLED devices or a portion of an OLED device with light in a predetermined portion of the spectrum so that the pixel emissive layers are excited to produce an output color response for each pixel; b) capturing an image of the output light produced by the excited pixels and converting such captured light into a digital image; and c) determining device pixel size, shape, location, and emitted light intensity from the digital image and comparing such size, shape, location, and emitted light intensity with predetermined acceptable size, shape, location, and emitted light intensity ranges to determine whether there is a defect in the OLED device(s), wherein step c) is accomplished using a computer program which responds to the captured digital image to automatically determine whether there is a defect or producing an output visual image and wherein a user inspects such image to determine its defects.