Invention Grant
- Patent Title: Polarizing plate with phase difference layers, and organic EL display device
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Application No.: US16320270Application Date: 2017-07-21
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Publication No.: US10969527B2Publication Date: 2021-04-06
- Inventor: Yuki Hasegawa , Ayaka Umemoto , Kentarou Takeda
- Applicant: NITTO DENKO CORPORATION
- Applicant Address: JP Ibaraki
- Assignee: NITTO DENKO CORPORATION
- Current Assignee: NITTO DENKO CORPORATION
- Current Assignee Address: JP Ibaraki
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JPJP2016-149769 20160729
- International Application: PCT/JP2017/026496 WO 20170721
- International Announcement: WO2018/021190 WO 20180201
- Main IPC: G02B5/30
- IPC: G02B5/30 ; H05B33/02 ; G09F9/30 ; H01L51/52

Abstract:
A polarizing plate with retardation layers of the present invention includes a polarizer, a first retardation layer, and a second retardation layer in the staled order. The polarizer and the lust retardation layer are bonded to each other via a first adhesive layer, the first retardation layer and the second retardation layer are bonded to each other via a second adhesive layer, the first retardation layer and the second retardation layer each have a thickness of 5 μm or less, and the second adhesive layer has an average refractive index of 1.55 or more, and a difference between the average refractive index of the second adhesive layer and an average refractive index of the first retardation layer, and a difference between the average refractive index of the second adhesive layer and an average refractive index of the second retardation layer are each less than 0.08.
Public/Granted literature
- US20190235148A1 POLARIZING PLATE WITH PHASE DIFFERENCE LAYERS, AND ORGANIC EL DISPLAY DEVICE Public/Granted day:2019-08-01
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