G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/02 (2006.01) G02B 1/04 (2006.01) G02F 1/1335 (2006.01)
Patent
CA 2229931
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.
Un matériau et un procédé amélioré procurent une réflectivité lumineuse diffuse dans des afficheurs rétro-éclairés tels que ceux, à cristaux liquides (ACL), utilisés à de nombreuses fins. En recourant à un polytétrafluoréthylène (PTFE) expansé comprenant une microstructure de noeuds et fibrilles polymères, ce matériau offre une réflectivité diffuse exceptionnelle sur un large spectre de lumière visible. Ce matériau présente aussi beaucoup de propriétés précédemment absentes des matériaux à forte réflectivité diffuse, y compris un degré élevé de malléabilité, d'aptitude au moulage et de souplesse, ainsi qu'une réflectivité efficace même en cas de profil transversal relativement mince.
Hannon Gregory E.
Mcgregor Gordon L.
Minor Raymond B.
Gowling Lafleur Henderson Llp
W. L. Gore & Associates Inc.
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