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Polarizing plate, polarizing film, and method for manufacturing polarizing plate

A manufacturing method and polarizer technology, applied in polarizing components, instruments, optics, etc., can solve the problems of uneven thickness distribution of polarizers, uneven thickness distribution of polarizers, etc., and achieve the effect of reducing unevenness

Active Publication Date: 2021-12-03
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if such a method is used to manufacture a polarizing plate, there is a problem that the unevenness of the thickness distribution of the polarizing plate in the transmission axis direction (width direction) becomes large.
In addition, in recent years, the brightness of the backlight has been increased for the purpose of improving the visibility, and the uneven thickness distribution of the polarizer is more easily recognized than before.

Method used

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  • Polarizing plate, polarizing film, and method for manufacturing polarizing plate
  • Polarizing plate, polarizing film, and method for manufacturing polarizing plate
  • Polarizing plate, polarizing film, and method for manufacturing polarizing plate

Examples

Experimental program
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Effect test

Embodiment

[0146] The planarization of the coating liquid for resin layers with respect to the heat-shrinkable shape of a base film among the causes of the large thickness distribution of a polarizing plate in the thin polarizing plate manufacturing method was verified. Figure 9 It is a cross-sectional view showing a verification laminate 2 produced as a verification example. It should be noted that, in Figure 9 In , the same reference numerals are assigned to the same configurations as those in the above-mentioned embodiment.

[0147] The laminated body 2 for verification is equipped with the base film 20, the primer layer 32, and resin layer 134a, 134b. The resin layer 134a is formed on the upper surface 20a of the base film 20 via the primer layer 32 . The resin layer 134b is formed on the lower surface 20b of the base film 20 via the primer layer 32 . The upper surface of the resin layer 134a and the lower surface of the resin layer 134b are flat surfaces.

[0148] In this veri...

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Abstract

The present invention provides a thin polarizing plate having a small thickness distribution, a polarizing film including such a polarizing plate, and a method for producing a polarizing plate. A polarizing plate related to a technical solution of the present invention is a polarizing plate in which a dichroic dye is oriented in a polyvinyl alcohol-based resin, and the polarizing plate is characterized in that the thickness of the polarizing plate is 10 μm or less, and the polarizing plate has a thickness of 10 μm or less. direction, the maximum amplitude of the thickness distribution is 0.4 μm or less.

Description

technical field [0001] The present invention relates to a polarizing plate, a polarizing film and a method for manufacturing the polarizing plate. Background technique [0002] A polarizing plate obtained by adsorbing a dichroic substance on a hydrophilic polymer layer made of a polyvinyl alcohol (PVA: PolyVinyl Alcohol) resin is known (for example, Patent Document 1). A polarizing film using such a polarizing plate is used in liquid crystal display devices such as personal computers, TVs, monitors, mobile phones, and PDAs (Personal Digital Assistant: Handheld Computers). In recent years, along with the high performance and thinning of liquid crystal display devices, thinning of the polarizing plate of the polarizing film used in the liquid crystal display device is also pursued. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2009-098653 [0006] In order to manufacture a thinner polarizer, for example, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30
CPCG02B5/3033
Inventor 出崎光
Owner SUMITOMO CHEM CO LTD
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