Method of inspecting defect for electroluminescence display apparatus, defect inspection apparatus, and method of manufacturing electroluminescence display apparatus using defect inspection method and apparatus
US8493296B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Sep 4, 2007 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | May 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3233
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dark spot defect of an EL element is detected based on an emission brightness or a current flowing through the EL element when an element driving transistor which controls a drive current to be supplied to the EL element is operated in its linear operating region and the EL element is set to an emission level. A dim spot defect caused can be detected based on a current flowing through the EL element when the element driving transistor is operated in its saturation operating region and the EL element is set to the emission level. When an abnormal display pixel is detected based on an emission brightness, a pixel which is determined as an abnormal display pixel and which is not determined as a dark spot defect is determined, and the pixel is detected as a dim spot defect caused by the characteristic variation of the element driving transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.