Production method of substrate for liquid crystal display using image-capturing and reference position detection at corner of pixel present in TFT substrate
US7812920B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 2007 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Mar 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/136222
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A production method of a substrate for a liquid crystal display in which an exposure pattern of a color filter or a black matrix is formed in a predetermined position of a TFT substrate at a high level of precision. Therefore the production method includes following steps: applying a photosensitive material for a color filter or a black matrix onto a TFT substrate; image-capturing a pixel region by an imaging unit while transporting the TFT substrate coated with the photosensitive material at a predetermined velocity by a transporting unit; detecting a reference position preset in the pixel region image-captured by the imaging unit at an image processing section of a control unit; and controlling irradiation timing of a light source in an exposure optical system by a lamp controller with reference to the detected reference position, and forming an exposure pattern of a color filter or a black matrix at a predetermined position of the TFT substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.