Electromagnetic shielding film and optical filter
US8426749B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2008 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Apr 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133334
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic shielding film comprises a conductive portion and an opening portion, and a moire preventing part is formed in the opening portion. The moire preventing part may be formed approximately at the center of the opening portion, and may be formed on a line connecting intersections facing each other in the conductive portion in the mesh pattern. The moire preventing part may have a substantially circular planar shape or a polygonal planar shape (such as a quadrangular, pentagonal, hexagonal, or octagonal shape). Of course the moire preventing part may have an at least partially curved planar shape. The electromagnetic shielding film preferably satisfies the inequality 0.1 Sa≦Sb≦5.0 Sa, in which Sa is the area of the intersection of the conductive portion and Sb is the area of the moire preventing part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.