Method for determining the edges of an overlapping region between a color filter and a black matrix
US9507115B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2015 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jan 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a method for determining edges of an overlapping region between a color filter and a black matrix, which comprises the following steps. An original gray-scale value curve and a differential gray-scale value curve of the measurement area to be detected are drawn, and extremums of the differential gray-scale value curve are determined. A gray-scale value of the overlapping region between the color filter and the black matrix is obtained. A threshold value is established. Two extremums of the differential gray-scale value curve which are the closest to the two intersections respectively are obtained, and then the edges of the overlapping region between the color filter and the black matrix are determined based on the two extremums.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.