Optical laminate and manufacturing method therefor, smart window comprising same, and vehicle and building windows and doors to which same are applied
US-2024319548-A1 · Sep 26, 2024 · US
Polarizer and polarizing plate including same
US9703025B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9703025-B2 |
| Application number | US-201415039715-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 18, 2014 |
| Priority date | Nov 29, 2013 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
Provided are a polarizer that resists red discoloration in a heat resistance test even when it has a small thickness, and a polarizing plate including the polarizer. The polarizer has a thickness less than or equal to 10 μm and a retardation Rpva variation within 0.2 nm/mm in the transmission axis direction.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polarizer comprising a polyvinyl alcohol-based resin and a dichroic dye oriented in the polyvinyl alcohol-based resin, the polarizer having a thickness less than or equal to 10 μm and a variation of retardation of polyvinyl alcohol at a wavelength of 1000 nm within 0.2 nm/mm in a transmission axis direction, the retardation being a value determined from a fitting parameter obtained when retardation values at wavelengths greater than or equal to 850 nm are subjected to fitting of the Sellmeier formula by least squares method. 2. A polarizing plate comprising the polarizer according to claim 1 . 3. The polarizing plate according to claim 2 , further comprising a protective film bonded to at least one surface of the polarizer.
Assignees
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Classifications
Protective coatings, e.g. hard coatings · CPC title
including organic materials, e.g. polymeric layers · CPC title
- G02B5/3033Primary
in the form of a thin sheet or foil, e.g. Polaroid · CPC title
made of polarising materials · CPC title
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Frequently asked questions
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- What does patent US9703025B2 cover?
- Provided are a polarizer that resists red discoloration in a heat resistance test even when it has a small thickness, and a polarizing plate including the polarizer. The polarizer has a thickness less than or equal to 10 μm and a retardation Rpva variation within 0.2 nm/mm in the transmission axis direction.
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification G02B5/3033. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 11 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).