Backlighting assembly for display for reducing cross-hatching
First Claim
1. A backlight assembly for a display having a polarized transmission axis comprising:
- a light source for emitting light;
a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from said light source, wherein the first direction extends at an angle of between about 5 degrees and about 15 degrees offset from the polarized transmission axis of the display; and
a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting said first brightness enhancement film, wherein the second direction is substantially perpendicular to the first direction.
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Accused Products
Abstract
A backlight assembly for a display having a polarized transmission axis is provided including a light source for emitting light; a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from the light source; and a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting the first brightness enhancement film, wherein the first direction extends at an angle of between about 5 degrees and about 15 degrees offset from the polarized transmission axis of the display and the second direction is substantially perpendicular to the first direction.
475 Citations
20 Claims
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1. A backlight assembly for a display having a polarized transmission axis comprising:
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a light source for emitting light; a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from said light source, wherein the first direction extends at an angle of between about 5 degrees and about 15 degrees offset from the polarized transmission axis of the display; and a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting said first brightness enhancement film, wherein the second direction is substantially perpendicular to the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display comprising:
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a light source for emitting light; a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from said light source; a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting said first brightness enhancement film; and a display element disposed to receive light from said second brightness enhancement film, said display element having a polarized transmission axis, wherein the first direction extends at an angle of between about 5 degrees and about 15 degrees offset from the polarized transmission axis of said display element and the second direction is substantially perpendicular to the first direction. - View Dependent Claims (9, 10, 11, 12)
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13. A rearview assembly for a vehicle comprising:
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a housing for attachment to the vehicle; a glass element disposed in said housing; and a display disposed behind said mirror element in said housing, said display comprising; a light source for emitting light; a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from said light source; a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting said first brightness enhancement film; and a display element disposed to receive light from said second brightness enhancement film, said display element having a polarized transmission axis, wherein the first direction extends at an angle of between about 5 degrees and about 15 degrees offset from the polarized transmission axis of said display element. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification