OPTICAL FILM COMPOSITE FOR BRIGHTNESS ENHANCEMENT INCLUDING A BIREFRINGENT POLYMER LAYER
First Claim
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1. An optical film composite comprising:
- a linear, reflective polarizing film;
a first birefringent polymeric substrate layer having birefringence, which is placed on the reflective polarizing film; and
a second polymeric substrate layer placed beneath the reflective polarizing film, wherein the optical axis of the first polymeric substrate layer is oriented with respect to the transmission axis of the reflective polarizing film to have 0°
to 25°
of an angular difference of between the axes.
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Abstract
The present invention provides an optical film composite that comprises a linear, reflective polarizing film; a first polymeric substrate layer having birefringence, which is placed on the reflective polarizing film; and a second polymeric substrate layer placed beneath the reflective polarizing film, wherein the optical axis of the first polymeric substrate layer is oriented with respect to the transmission axis of the reflective polarizing film to have of 0° to 25° of an angular difference between the axes. The optical film composite can be employed in LCD devices to improve optical performance.
16 Citations
20 Claims
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1. An optical film composite comprising:
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a linear, reflective polarizing film; a first birefringent polymeric substrate layer having birefringence, which is placed on the reflective polarizing film; and a second polymeric substrate layer placed beneath the reflective polarizing film, wherein the optical axis of the first polymeric substrate layer is oriented with respect to the transmission axis of the reflective polarizing film to have 0°
to 25°
of an angular difference of between the axes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A process for manufacturing an optical film composite, comprising the steps of:
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providing a linear, reflective polarizing film; placing a first polymeric substrate layer having birefringence on a side of the reflective polarizing film so that an angular difference between the optical axis of the first polymeric substrate layer and the transmission axis of the reflective polarizing film is 0°
to 25°
; andplacing a second polymeric substrate layer on the other side of the reflective polarizing film. - View Dependent Claims (20)
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Specification