Method and apparatus for multi-color display
First Claim
1. A field sequential color shutter display system, comprising:
- a source of light that melts light rays of a plurality of colors and having substantially first and second different primary colors, one of said first and second different primary colors being itself one of the primary colors of the display system;
first light polarizing means in optical communication with said source, including a color selective polarizing filter having first and second substantially orthogonally oriented absorption axes, said first absorption axis passing linearly polarized light of said first color, said second absorption axis passing linearly polarized light of both said first and second colors;
second light polarizing means in optical communication with said first light polarizing means, including a polarizing filter having a first absorption axis substantially aligned with one of said first or second absorption axes of said first light polarizing means and passing linearly polarized light of both said first and second colors, and a second absorption axis of essentially zero transmission;
liquid crystal variable optical retarding means disposed between said first and second light polarizing means; and
switching means in communication with said variable optical retarding means to selectively provide first and second switching states to produce respective first and second amounts of optical retardation to develop, over a relatively broad range of viewing angles, a light output of either said first color, or a composite color containing both said first an d second colors, through said second light polarizing means.
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Accused Products
Abstract
A field sequential color shutter display system including a light source emitting light rays having substantially first and second different primary colors. First and second light polarizing filters are included. The filters are aligned in optical communication with the source. Each filter includes a color selective polarizing filter having substantially orthogonally oriented absorption axes. The first absorption axis of each light polarizing filter passes linearly polarized light of the first color and a uniform first polarization. The second absorption axis of each light polarizing filter passes linearly polarized light of both the first and second colors and a uniform second polarization. Variable optical retarding filters are disposed between the first and second light polarizing filters. Switching filters are in communication with the variable optical retarding filters to selectively provide first and second switching states to produce respective first and second amounts of optical retardation to develop, over a relatively broad range of viewing angles, a light output through the second light polarizing filter of either the first color, or, a composite light output containing both the first color, having both the first and second polarizations, and the second color having only the second polarization.
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Citations
38 Claims
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1. A field sequential color shutter display system, comprising:
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a source of light that melts light rays of a plurality of colors and having substantially first and second different primary colors, one of said first and second different primary colors being itself one of the primary colors of the display system; first light polarizing means in optical communication with said source, including a color selective polarizing filter having first and second substantially orthogonally oriented absorption axes, said first absorption axis passing linearly polarized light of said first color, said second absorption axis passing linearly polarized light of both said first and second colors; second light polarizing means in optical communication with said first light polarizing means, including a polarizing filter having a first absorption axis substantially aligned with one of said first or second absorption axes of said first light polarizing means and passing linearly polarized light of both said first and second colors, and a second absorption axis of essentially zero transmission; liquid crystal variable optical retarding means disposed between said first and second light polarizing means; and switching means in communication with said variable optical retarding means to selectively provide first and second switching states to produce respective first and second amounts of optical retardation to develop, over a relatively broad range of viewing angles, a light output of either said first color, or a composite color containing both said first an d second colors, through said second light polarizing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A field sequential color shutter display system, comprising:
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a source of light that emits light rays of a plurality of colors and having substantially first and second different primary colors; first and second light polarizing means, said first light polarizing means in optical communication with said source and said second light polarizing means in optical communication with said first light polarizing means, each of said light polarizing means including a color selective polarizing filter having substantially orthogonally oriented absorption axes, the first absorption axis of each light polarizing means passing linearly polarized light of said first color, the second absorption axis of each light polarizing means passing linearly polarized light of both said first and second colors, said respective absorption axes of said first and second light polarizing means being in substantial alignment with one another; liquid crystal variable optical retarding means disposed between said first and second light polarizing means; and switching means in communication with said variable optical retarding means to selectively provide first and second switching states to produce respective first and second amounts of optical retardation to transmit, over a relatively broad range of viewing angles, a light output containing both said first color, having said first and second polarization, and said second color having said second polarization. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of providing a field sequential color shutter display system in a high ambient light environment comprising the steps of:
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generating a source of light having at least two different wavelength components of a first and a second color; polarizing the light thus generated using a color selective polarizing filter having first and second substantially orthogonally oriented absorption axes, said first absorption axis passing linearly polarized light of said first color and a uniform first polarization, said second absorption axis passing linearly polarized light of both said first and second colors and a uniform second polarization; selectively retarding components of said polarized light to produce linearly polarized light of either zero or 90 degrees rotation, or circularly polarized light; linearly polarizing said light for selectively transmitting light of either said first color and polarization, or of a composite color containing both said first and second colors and second polarization determined by the amount by which the light has been optically retarded; and controlling the amount of optical retardation by at least first and second retardations to result in the emission of light of either said first color and polarization, or a composite color containing both said first and second colors and second polarization. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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Specification