Cholesteric liquid crystal optical bodies and methods of manufacture and use
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Abstract
An optical body includes a) first particles comprising a first cholesteric liquid crystal material and b) a second cholesteric liquid crystal material. The first particles and the second cholesteric liquid crystal material form a structure where the first cholesteric liquid crystal material has a pitch that is different than the second cholesteric liquid crystal material. In one example, the second cholesteric liquid crystal material is in the form of second particles. In another example, the first particles are dispersed in a matrix of the second cholesteric liquid crystal material. In other examples, the optical body has more than one layer. In addition, one or more additional cholesteric liquid crystal materials can be used in the optical body. These optical bodies can be used as a reflective polarizer and can be used in a display.
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Citations
31 Claims
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21. A method of making an optical body, the method comprising:
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(a) disposing on a substrate a plurality of first particles comprising a first cholesteric liquid crystal composition;
(b) disposing on the substrate a second cholesteric liquid crystal composition to form a structure with the first cholesteric liquid crystal composition; and
(c) converting the first and second cholesteric liquid crystal compositions into first and second cholesteric liquid crystal materials, respectively, wherein the first cholesteric liquid crystal material has a pitch different than the second liquid crystal material. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification