Ridged reflector having optically transmissive properties for an optical display device
US6285426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133553
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A ridged reflector (10) permits operation of an optical display device (12) in ambient light, which may be supplemented by artificial back-lighting. The ridged reflector (10) for use in an optical display (12) includes a transparent polymeric layer (70) having a ridged surface (32). The ridged surface (32) includes a series of ridges (36). Each of the ridges (36) has a first face (42) and a second face (44) preferably intersecting the first face (42). A reflective layer (68) overlies the first face (42) of each of the ridges (36). The second face 44 (44) is generally light-transmissive and substantially free of a reflective layer (68). The ridged surface (32) has an opposite surface (34) opposite the ridged surface (32). The second face (44) of each of said ridges (36) allows optical communication with the opposite surface (34) for optional back-lighting of the optical display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.