Invention Application
- Patent Title: SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES
- Patent Title (中): 单层反光偏光片,厚度适中,低色调,倾斜角度
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Application No.: PCT/US2017/051062Application Date: 2017-09-12
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Publication No.: WO2018052872A1Publication Date: 2018-03-22
- Inventor: NEVITT, Timothy J. , STOVER, Carl A. , BENOIT, Gilles J. , DERKS, Kristopher J. , YANG, Zhaohui
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: 3M Center Post Office Box 33427 Saint Paul, Minnesota 55133-3427 US
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: 3M Center Post Office Box 33427 Saint Paul, Minnesota 55133-3427 US
- Agency: FULTON, Lisa P. et al.
- Priority: US62/393,985 20160913
- Main IPC: G02B27/28
- IPC: G02B27/28 ; G02B5/30 ; G02B5/28 ; G02F1/1335 ; B29D11/00 ; B32B7/02
Abstract:
Multilayer optical film reflective polarizers previously considered to have excessive off-axis color can provide adequate performance in an LC display in an "on-glass" configuration, laminated to a back absorbing polarizer of the display, without any light diffusing layer or air gap in such laminate. The reflective polarizer is a tentered-one-packet (TOP) multilayer film, having only one packet of microlayers, and oriented using a standard tenter such that birefringent microlayers in the film are biaxially birefringent. The thickness profile of optical repeat units (ORUs) in the microlayer packet is tailored to avoid excessive perceived color at normal and oblique angles. Color at high oblique angles in the white state of the display is reduced by positioning thicker ORUs closer to the absorbing polarizer, and by ensuring that, with regard to a boxcar average of the ORU thickness profile, the average slope from an ORU(600) to an ORU(645) does not exceed 1.8 times the average slope from an ORU(450) to the ORU(600).
Information query