Method for producing an optical sheet
US7901600B2 · kind B2 · utility
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1Claims
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Key dates
| Filing date | Apr 8, 2008 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Apr 8, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/0294
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens film with small warpage even when a transparent base is thin is provided. Pole prisms made of a hardening resin are arranged along the extending direction on a transparent base made of a flexible material. The transparent base has a depression according to a valley between the pole prisms adjacent to each other. The pole prism has a sloping face extending to an inner wall of the depression. The transparent base is in contact with the valley. A layer not functioning as a prism, that is, a so-called skirt layer does not exist between the transparent base and the pole prisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.