Low birefringent light redirecting film
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Accused Products
Abstract
The invention relates to a polymeric optical film comprising a base provided with integral optical features on at least one side, wherein the features have two or more sides that form a ridge line, wherein the optical film has light leakage through crossed polarizers of less than 1.0%.
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Citations
43 Claims
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1-35. -35. (canceled)
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36. A liquid crystal display comprising a backlight section, the backlight section comprising:
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a light source for providing light to the display; a waveguide for receiving the light; a reflector on a back side of the waveguide for reflecting the light towards normal; a diffuser film on the front side of the waveguide for diffusing incoming light; a light redirecting film having a birefringence of between 1.0×
10−
5 to 5.0×
10−
3;a first polarizer crossed from a second polarizer; and wherein the light redirecting film is provided between the first and second polarizers and the light leakage through the crossed first and second polarizers and the light redirecting film is less than 1.0%. - View Dependent Claims (37, 38, 39, 40, 41)
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42. A liquid crystal display comprising a backlight section, the backlight section comprising:
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a light source for providing light to the display; a polarizing waveguide for receiving the light; a reflector on a back side of the waveguide for reflecting the light towards normal; a light redirecting film having a birefringence of between 1.0×
10−
5 to 5.0×
0-3;an absorptive polarizer crossed from the polarizing waveguide; and wherein the light redirecting film is provided between the polarizing waveguide and the absorptive polarizer and the light leakage through the crossed polarizing waveguide and the absorptive polarizer, and the light redirecting film is less than 1.0%.
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43. A liquid crystal display comprising:
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a light source for providing light to the display; a waveguide for receiving the light; a reflector on a back side of the waveguide for reflecting the light towards normal; a diffuser film on the front side of the waveguide for diffusing incoming light; a light redirecting film having a birefringence of between 1.0×
10−
5 to 5.0×
10−
3;a liquid crystal cell for transmitting polarized light; a first absorptive polarizer crossed from a second absorptive polarizer; and wherein the light redirecting film and the liquid crystal cell are provided between the first and second absorptive polarizers and the light leakage through the crossed first and second absorptive polarizers, and the light redirecting film and liquid crystal cell is less than 1.0%.
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Specification