Display apparatus with corrosion-resistant light directing film
US6357880B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2001 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Apr 12, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is a display apparatus that provides protection against damage for a metallic layer. The display apparatus includes a light modulating layer, a polarizer, and a light directing film. The light directing film includes a prismatic structure having two sides, where one side includes saw tooth formations having tilted surfaces and a metal layer on the side of the prismatic substrate having the saw-tooth formations. A tilt angle of the tilted surfaces offsets an optimal viewing angle for the display from a glare angle for the display. In a first embodiment of the invention, the light directing film of the display apparatus further includes an inorganic protective layer formed on the metal layer, wherein the inorganic protective layer inhibits molecular transfer to the metal layer and balances the color of reflected and transmitted light. The light directing film further includes a pressure sensitive adhesive layer between a polarizer and the inorganic protective layer. Alternatively, the light directing film of the display apparatus of the present invention includes a polymer protective layer formed over the metal layer to protect the metal layer from damage. The l…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.