White film and surface light source using same
US8794798B2 · kind B2 · utility
1Cited by
7References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 18, 2011 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Sep 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A white film has reflective properties, concealing properties and film-forming stability and can be made into a thin film, a white film, which contains voids therein and satisfies the following formulae (i) to (iii) is provided:0.6≦nB/nA≦0.9 (i)20≦nA (ii)15≦nB (iii)(wherein, nA represents the number of interfaces in 10 μm of the surface layer in the film thickness direction; and nB represents the number of interfaces in ±5 μm of the central part in the film thickness direction).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.