Display panel inspection system, inspection method of display panel and display panel using the same
US11120544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2019 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Dec 17, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30204
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display panel inspection system includes a camera to image respective frames of a mother substrate in a frame-by-frame manner, a stage to move the mother substrate relative to the camera, an image obtaining unit to store frames imaged by the camera, a gray level extracting unit that obtains gray level values of the frames, a frame matching unit that searches and matches two frames that match each other among the frames imaged by the camera, a correcting unit that performs correction on one of two frames matched with each other in consideration of an alignment error and an image distortion between the two frames, and a comparing unit that compares the gray level values of the two frames matched with each other, after the correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.