Method and device for detecting foreign particle in liquid crystal display panel
US8547130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2009 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Apr 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/69
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for detecting a foreign particle trapped between substrates of a liquid crystal display panel, by which a potential short caused by the particle can be made into a short with reliability, and thus it is possible to make a display defect manifest itself that is caused by the particle. The method is for detecting the presence of a foreign particle trapped between flexible substrates (21, 26) of a liquid crystal display panel (20), between the substrates liquid crystals filled, and the method includes making the panel pass between supporting rollers (3) arranged to support one surface of the panel, and a pressing roller (4) disposed at a position opposed to a space between the supporting units and arranged to press the other surface of the panel, bending the panel, and displacing the substrates with respect to each other in their surface directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.