Light reflectant surface of expanded polytetrafluoroethylene with nodes and fibrils for backlit liquid crystal displays
US5838406A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1995 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Aug 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is an improved material and method for use for providing diffuse reflectivity of light in backlighted visual displays, such as liquid crystal displays (LCD) employed in a wide variety of applications. By employing an expanded polytetrafluoroethylene (PTFE) comprising a microstructure of polymeric nodes and fibrils, the material of the present invention demonstrates exceptional diffuse reflectivity across a wide spectrum of visible light. Additionally, the material of the present invention provides many properties that have been previously unavailable in highly diffuse reflective material, including a high degree of malleability, moldability and flexibility, and effective reflectivity even at relatively thin cross-sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.