White film and backlight using same
First Claim
1. A white film consisting essentially of polymer film containing air bubbles and having a thermal shrinkage rate in longitudinal and transverse directions of the film that are not less than −
- 0.2% and not more than 0.5% at 90°
C.
1 Assignment
0 Petitions
Accused Products
Abstract
A white film including polymer film wherein both the thermal shrinkage rate in the longitudinal direction and that in the transverse direction of the film are not less than −0.2% and not more than 0.5% at 90° C., and a backlight for liquid crystal displays using such a white film. Since the white film hardly suffers from undulation or rise in its end portions, it is most suitable as a reflection film for backlights of liquid crystal displays. Since a backlight for liquid crystal displays using this white film can be used for a long time, it is applicable to liquid crystal displays of various electrical/electronic devices.
-
Citations
12 Claims
-
1. A white film consisting essentially of polymer film containing air bubbles and having a thermal shrinkage rate in longitudinal and transverse directions of the film that are not less than −
- 0.2% and not more than 0.5% at 90°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- 0.2% and not more than 0.5% at 90°
Specification