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Outstandingly durable and heat-resistant polarising element, polarising plate and image-display device, and polarising-element production method

A polarizer, range technology, applied in polarizing elements, optical elements, instruments, etc., can solve problems such as difficult to control orientation, reduced transmittance, and no degree of polarization can be obtained

Active Publication Date: 2013-09-25
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, prior art methods for self-modification of polyvinyl alcohol (hereinafter abbreviated as "PVA")-based films have disadvantages such as reduced polarization due to insufficient absorption of iodine or dichroic dyes by the polymer matrix. , and the decrease in transmittance due to the modification of the polymer matrix
In the method using a non-sublimable dichroic dye, it is difficult to control the orientation when stretching the PVA film, so a sufficient degree of polarization cannot be obtained

Method used

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  • Outstandingly durable and heat-resistant polarising element, polarising plate and image-display device, and polarising-element production method
  • Outstandingly durable and heat-resistant polarising element, polarising plate and image-display device, and polarising-element production method
  • Outstandingly durable and heat-resistant polarising element, polarising plate and image-display device, and polarising-element production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] In addition to adding 2.5 wt.% zinc nitrate to the cross-linking and stretching step (B), and then immersing the polyvinyl alcohol film in distilled water at 25° C. (degrees Celsius) for 20 seconds in the washing step (C), A polarizer and a polarizing plate were produced in the same manner as in Comparative Example 1.

Embodiment 2

[0093] Except adding 5 wt.% zinc nitrate to the cross-linking and stretching step (B), and then immersing the polyvinyl alcohol film in distilled water at 25°C (Celsius) for 20 seconds in the washing step (C), according to A polarizer and a polarizing plate were manufactured in the same manner as in Comparative Example 1.

Embodiment 3

[0095] In addition to adjusting the concentration of potassium iodide to 7.0wt.%, and adding 5wt.% of zinc nitrate into the cross-linking and stretching step (B), and then washing the polyvinyl alcohol film at 25 ° C (C) degrees Celsius) in distilled water for 20 seconds, a polarizer and a polarizing plate were manufactured in the same manner as in Comparative Example 1.

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Abstract

The present invention relates to a polarizer in which contents of zinc, boron, and potassium are controlled to be within a certain range, a polarizing plate, and an image display device having excellent durability and heat resistance, and a method of manufacturing the polarizer. In one embodiment, the present invention provides a polarizer, in which the value of zinc content (wt. %)×boron content (wt. %) / potassium content (wt. %) is 0.1 to 4.0, boron content is 1.0 wt. % to 5.0 wt. % and potassium content is 0.3 wt. % to 2.0 wt. %, based on the weight of the polarizer, a polarizing plate and an image display device including the same. Further, the present invention provides a method of manufacturing a polarizer, the method including at least a dyeing process, a cross-linking process, a stretching process and a washing process.

Description

technical field [0001] The present invention relates to a polarizer having excellent durability and heat resistance, a polarizing plate and an image display device, and a method for manufacturing the polarizer, and more particularly, the present invention relates to a polarizer having excellent durability and heat resistance A polarizer, a polarizer and an image display device, wherein the contents of zinc, boron and potassium in the polarizer are controlled within a certain range, and a manufacturing method of the polarizer. Background technique [0002] Polarizers used in image display devices (such as liquid crystal displays (LCD), organic electroluminescence (EL) displays, plasma displays (PDP), etc.) need to have high transmittance and high degree of polarization to provide excellent color reproduction sexual images. Polarizers in the prior art are manufactured by dyeing a polyvinyl alcohol film with dichroic iodine or a dichroic dye, etc., crosslinking the dyed film, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30H01J11/44
CPCH01J11/44G02B5/305
Inventor 权寄玉金承爱罗钧日
Owner LG CHEM LTD
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