Patent ID: 8851734
Filing Date: 2014-10-07
Classification: G02B

Abstract:
1. A light-guiding article comprising: a film substrate that has at least one patterned surface comprising a plurality of discrete surface features and an incident edge that is substantially orthogonal to the at least one patterned surface, wherein each surface feature in the plurality of discrete surface features extends along a length direction that is substantially parallel to the incident edge; and wherein, taken in cross-section along the length direction, each surface feature has a positively sloped portion, a substantially flat portion, and a negatively sloped portion and wherein a first widthwise cross-section taken at a first position through the positively sloped portion, a second widthwise cross-section taken at a second position through the negatively sloped portion and a third widthwise cross-section taken at a third position through the substantially flat portion have the same widthwise characteristic cross-sectional shape throughout.