Optical device, material for forming optical device, backlight for display, display and method of making device or material
US8212962B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2008 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | May 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133615
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device is provided, for example for use as a brightness enhancing film in a display. The device comprises a sheet (31) carrying a plurality of light-concentrating elements in the form of prism-like structures (171). The sheet (31) is non-flat, for example by being bent or curved, in one direction. Each of the prism-like structures (171) has first and second surfaces (34, 35) extending from the sheet (31) and intersecting at a line (33). A line (32) parallel to the viewing direction and passing through the intersection line (33) bisects the opposite surface (36) where it intersects (38) the film (31). When used in a display, such a device provides improved and uniform display brightness across a display of curved or other non-flat shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.