Invention Application
- Patent Title: DISPLAY LAMINATE WITH SINGLE PACKET BIAXIALLY BIREFRINGENT REFLECTIVE POLARIZER
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Application No.: US16745427Application Date: 2020-01-17
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Publication No.: US20200150329A1Publication Date: 2020-05-14
- Inventor: Carl A. Stover , Kristopher J. Derks , Timothy J. Nevitt , Gilles J. Benoit
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Main IPC: G02B5/30
- IPC: G02B5/30 ; G02B27/28 ; G02F1/1335 ; B32B17/06 ; B29D11/00

Abstract:
Multilayer optical film reflective polarizers previously considered to have excessive off-axis color can provide adequate performance in an LC display without any high haze light diffusing layer or air gap between the reflective polarizer and the back absorbing polarizer of the display. The reflective polarizer has only one packet of microlayers, and is oriented using a standard tenter such that birefringent microlayers in the film are biaxially birefringent. The microlayers in the packet have a layer thickness profile suitably tailored to avoid excessive perceived color at normal and oblique angles. A laminate made by combining this type of reflective polarizer with an absorbing polarizer, without an air gap or any high haze light diffusing layer or structure between the polarizers, can be used and incorporated into a liquid crystal display or the like with adequate color performance both at normal incidence and oblique incidence up to a polar angle of 60 degrees.
Public/Granted literature
- US10859741B2 Display laminate with single packet biaxially birefringent reflective polarizer Public/Granted day:2020-12-08
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