Controlling light transmission in a vehicle with polarization and ellipticity adjustment
First Claim
1. A light transmission control system for a vehicle, comprising:
- a combination of a display and a first polarizer, said combination disposed in said vehicle and comprising linear polarizing means for linearly polarizing light, said first polarizer comprising an ellipticity increaser, said ellipticity increaser configured and oriented with respect to said linear polarizing means such that light of at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser has a first ellipticity of higher than 0.5; and
a second polarizer associated with a window of said vehicle and comprising an ellipticity adjuster and a linear polarizer, said ellipticity adjuster oriented with respect to said linear polarizer such that light of said at least one visible wavelength passing from said linear polarizer through said ellipticity adjuster has a second ellipticity of higher than 0.5,said ellipticity increaser and said ellipticity adjuster disposed between said linear polarizing means and said linear polarizer,said ellipticity increaser and ellipticity adjuster configured and oriented with respect to each other such that light of said at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser and said ellipticity adjuster to said linear polarizer has a polarization ellipse with a third ellipticity of less than 0.5, a major axis of said polarization ellipse being substantially perpendicular to a transmission axis of said linear polarizer.
1 Assignment
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Accused Products
Abstract
Light transmission in a vehicle may be controlled using a system that includes a linear polarizing means and an ellipticity increaser associated with a display in the vehicle. The ellipticity increaser is configured and oriented with respect to the linear polarizing means for increasing the ellipticity of light passing from the linear polarizing means through the ellipticity increaser. The system also includes an ellipticity adjuster and a linear polarizer associated with a window of the vehicle. The ellipticity adjuster is oriented with respect to the linear polarizer for increasing the ellipticity of light passing from the linear polarizer through the ellipticity adjuster. The ellipticity increaser and adjuster are disposed between the linear polarizing means and the linear polarizer, and are configured and oriented with respect to each other for reducing ellipticity of light passing from the linear polarizing means through the ellipticity increaser and adjuster to the linear polarizer.
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Citations
49 Claims
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1. A light transmission control system for a vehicle, comprising:
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a combination of a display and a first polarizer, said combination disposed in said vehicle and comprising linear polarizing means for linearly polarizing light, said first polarizer comprising an ellipticity increaser, said ellipticity increaser configured and oriented with respect to said linear polarizing means such that light of at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser has a first ellipticity of higher than 0.5; and a second polarizer associated with a window of said vehicle and comprising an ellipticity adjuster and a linear polarizer, said ellipticity adjuster oriented with respect to said linear polarizer such that light of said at least one visible wavelength passing from said linear polarizer through said ellipticity adjuster has a second ellipticity of higher than 0.5, said ellipticity increaser and said ellipticity adjuster disposed between said linear polarizing means and said linear polarizer, said ellipticity increaser and ellipticity adjuster configured and oriented with respect to each other such that light of said at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser and said ellipticity adjuster to said linear polarizer has a polarization ellipse with a third ellipticity of less than 0.5, a major axis of said polarization ellipse being substantially perpendicular to a transmission axis of said linear polarizer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 47)
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26. A light filter system for limiting visibility of a display in a vehicle through a window of said vehicle, comprising:
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a first polarizer covering said window and comprising a linear polarizer and a first wave retarder, said first wave retarder located between said linear polarizer and said display, said first polarizer configured and arranged for transmitting external light of at least one visible wavelength therethrough into said vehicle in a polarized state having a polarization ellipticity from 0.5 to 1; and a second polarizer covering said display and comprising a second wave retarder, said second polarizer configured and arranged for transmitting light of said at least one visible wavelength emitted from said display therethrough in a polarized state having a polarization ellipticity from 0.5 to 1; said first and second polarizers being configured and aligned such that transmission of visible light emitted from said display through both of said first and second polarizers is limited, thereby reducing visibility of said display through said window. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of controlling light transmission in a vehicle, comprising:
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providing, in said vehicle, a combination of a display and a first polarizer, said combination comprising linear polarizing means for linearly polarizing light, said first polarizer comprising an ellipticity increaser, said ellipticity increaser oriented with respect to said linear polarizing means such that light of at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser has a first ellipticity of higher than 0.5; and providing a second polarizer associated with a window of said vehicle and comprising an ellipticity adjuster and a linear polarizer, said ellipticity adjuster oriented with respect to said linear polarizer such that light of said at least one visible wavelength passing from said linear polarizer through said ellipticity adjuster has a second ellipticity of higher than 0.5, said ellipticity increaser and said ellipticity adjuster disposed between said linear polarizing means and said linear polarizer, said ellipticity increaser and ellipticity adjuster configured and oriented with respect to each other such that light of said at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser and said ellipticity adjuster to said linear polarizer has a polarization ellipse with a third ellipticity of less than 0.5, a major axis of said polarization ellipse being substantially perpendicular to a transmission axis of said linear polarizer. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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48. A kit for controlling light transmission in a vehicle, said kit comprising:
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a first polarizer for covering a display of said vehicle, said first polarizer comprising a first linear polarizer and an ellipticity increaser, said ellipticity increaser oriented with respect to said first linear polarizer such that light of at least one visible wavelength passing from said first linear polarizer through said ellipticity increaser has a first ellipticity of higher than 0.5; and a second polarizer for covering a window of said vehicle, said second polarizer comprising an ellipticity adjuster and a second linear polarizer, said ellipticity adjuster oriented with respect to said second linear polarizer such that light of said at least one visible wavelength passing from said second linear polarizer through said ellipticity adjuster has a second ellipticity of higher than 0.5, said ellipticity increaser and ellipticity adjuster being configured so that, when said ellipticity increaser and said ellipticity adjuster are disposed between said first and second linear polarizers, they are capable of being oriented with respect to each other such that light of said at least one visible wavelength passing from said linear polarizing means through said ellipticity increaser and said ellipticity adjuster to said linear polarizer has a polarization ellipse with a third ellipticity of less than 0.5, a major axis of said polarization ellipse being substantially perpendicular to a transmission axis of said linear polarizer.
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49. A light transmission control system for a vehicle, comprising:
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first polarizing means associated with a display of said vehicle and comprising first linear polarizing means for linearly polarizing light and ellipticity increasing means for increasing ellipticity of light, said ellipticity increasing means oriented with respect to said first linear polarizing means such that light of at least one visible wavelength passing from said first linear polarizing means through said ellipticity increasing means has a first ellipticity of higher than 0.5; and second polarizing means associated with a window of said vehicle and comprising ellipticity adjusting means for adjusting ellipticity of light and second linear polarizing means for linearly polarizing light, said ellipticity adjusting means oriented with respect to said second linear polarizing means such that light of said at least one visible wavelength passing from said linear polarizing means through said ellipticity adjusting means has a second ellipticity of higher than 0.5, said ellipticity increasing means and said ellipticity adjusting means disposed between said first and second linear polarizing means, said ellipticity increasing means and ellipticity adjusting means configured and oriented with respect to each other such that light of said at least one visible wavelength passing from said first linear polarizing means through said ellipticity increasing means and said ellipticity adjusting means to said second linear polarizing means has a polarization ellipse with a third ellipticity of less than 0.5, a major axis of said polarization ellipse being substantially perpendicular to a transmission axis of said second linear polarizing means.
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Specification