Brightness enhancement film
First Claim
1. A display, comprising:
- a light source;
an LCD panel; and
a polarizer, disposed between said light source and said LCD panel;
wherein said polarizer comprises a polymeric continuous phase and a disperse phase, disposed within said continuous phase, and wherein said display exhibits a relative gain at 60°
that is at least equal to the relative gain exhibited by said display at normal incidence.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix in combination with light directing materials to enable control of light emitted from a lighting fixture or display. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film, and the light directing materials are chosen to control the direction of polarized light reflected from or transmitted by the optical film.
564 Citations
56 Claims
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1. A display, comprising:
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a light source; an LCD panel; and a polarizer, disposed between said light source and said LCD panel; wherein said polarizer comprises a polymeric continuous phase and a disperse phase, disposed within said continuous phase, and wherein said display exhibits a relative gain at 60°
that is at least equal to the relative gain exhibited by said display at normal incidence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display, comprising:
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a light source; an LCD panel; and a polarizer, disposed between said light source and said LCD panel; wherein said polarizer comprises a polymeric continuous phase and a disperse phase, disposed within said continuous phase, and wherein said display exhibits a relative gain as a function of angle within the range of 30°
to 60°
. - View Dependent Claims (11, 12, 13, 14)
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15. A display, comprising:
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a light source; an LCD panel; and a polarizer, disposed between said light source and said LCD panel; wherein said polarizer comprises a polymeric continuous phase and a disperse phase, disposed within said continuous phase, and wherein the average of the relative gain for said display taken over the range of 30°
to 60°
is greater than the relative gain of said display at normal incidence. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A display, comprising:
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an LCD panel; and a polarizer, disposed between said light source and said LCD panel; wherein said polarizer comprises a birefringent polymeric continuous phase and a disperse phase, disposed within said continuous phase, wherein said display exhibits a maximum relative gain as a function of angle within the range of 30°
to 60°
, and wherein said polarizer has a total diffuse reflectivity of at least about 30%.
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23. A display, comprising:
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a display module; a light source adapted to illuminate the display module; and a polarizer, positioned between the display module and the light source, said polarizer being adapted to transmit toward the display module light from the light source which has a first polarization orientation, and being further adapted to reflect away from the display module light from the light source which has a second polarization orientation;
wherein the polarizer comprises a polymeric continuous phase and a disperse phase, disposed within said continuous phase, and wherein said display exhibits a relative gain at 60°
that is at least equal to the relative gain exhibited by said display at normal incidence. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification