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Polarizing plate and manufacturing method thereof

A polarizer and metal technology, applied in the direction of polarizing elements, optics, instruments, etc., can solve problems such as image quality degradation, and achieve the effects of improving adhesion strength, increasing contact area, and high reliability

Active Publication Date: 2019-11-01
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the reflectance is high, image quality may deteriorate due to erroneous operation (malfunction) of the liquid crystal panel or stray light

Method used

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  • Polarizing plate and manufacturing method thereof
  • Polarizing plate and manufacturing method thereof
  • Polarizing plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] 2. Preparation method of polarizer

[0029]

[0030] The polarizing plate according to this embodiment includes: a transparent substrate transparent to light in the wavelength band used; reflective layers made of metal are arranged on the transparent substrate at a pitch smaller than the wavelength of light in the wavelength band used, and extend in a predetermined direction. a metal grid; a metal sub-grid formed on the metal grid at a pitch smaller than that of the metal grid; and an absorbing portion formed on the metal sub-grid and containing a light-absorbing material. According to such a polarizer, by increasing the contact area of ​​the metal sub-grid, the adhesion strength between the metal sub-grid and the absorbing portion can be increased, and in the narrow-pitch polarizer, the coexistence of optical characteristics and reliability can be maintained.

[0031] The pitch of the reflective layer of the metal grid is not more than 1 / 2 of the wavelength of the u...

specific example 1

[0042] figure 1 It is a cross-sectional view schematically showing the structure of the polarizing plate shown as Specific Example 1. Such as figure 1 As shown, the polarizer includes: a transparent substrate 11 that is transparent to light in the wavelength band used; reflective layers made of metal are arranged on the transparent substrate 11 at a pitch smaller than the wavelength of light in the wavelength band used, and extend in a predetermined direction. A metal grid 12; a metal sub-grid 13 formed on the metal grid at a pitch smaller than that of the metal grid 12 and made of the same metal as the reflective layer; and an absorption layer 14 obtained by filling the recesses of the metal sub-grid 13 with a light-absorbing material . That is, the polarizing plate shown as Specific Example 1 has, as the absorbing portion, the absorbing layer 14 in which the concave portion of the metal sub-grid 13 is filled with a light absorbing material.

[0043] The transparent subs...

specific example 2

[0052] figure 2 It is a cross-sectional view schematically showing the structure of the polarizing plate shown as Specific Example 2. Such as figure 2 As shown, the polarizing plate includes: a transparent substrate 21 that is transparent to light of the wavelength band used; reflective layers made of metal are arranged on the transparent substrate 21 at a pitch smaller than the wavelength of light of the wavelength band used, and extend in a predetermined direction. Metal grid 22; Formed on the metal grid with a smaller pitch than the metal grid 22, a metal sub-grid 23 made of the same metal as the reflective layer; Absorbent layer 24. That is, the polarizing plate shown as Specific Example 2 has an absorbing layer 24 obtained by obliquely vapor-depositing a light-absorbing material on an upper portion of a metal sub-grid 23 as an absorbing portion.

[0053] Since the transparent substrate 21 , the metal grid 22 and the metal sub-grid 23 are respectively the same as the ...

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PUM

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Abstract

To provide a polarizing plate capable of obtaining high reliability, and a manufacturing method thereof. A polarizing plate includes: a transparent substrate 11 which is transparent to light in a usewavelength band; metal grids 12 whose metal reflection layers are arrayed on the transparent substrate 11 at a smaller pitch than a wavelength of the light in the use band, and which extend in a predetermined direction; metal sub grids 13 which are formed on the metal grids 12 at a smaller pitch than the metal grids 12, and which are made of the same metal as the reflection layers; and absorptionlayers 14 formed by filling recesses of the metal sub grids 13 with a light-absorbing material.

Description

technical field [0001] The present technology relates to a polarizing plate (polarizing plate) of a wire grid type and a method for producing the polarizing plate. Background technique [0002] Since the wire-grid polarizing plate has high durability, it is suitable for use in, for example, a liquid crystal projector with a high optical density. In such a polarizing plate, low reflection is an important requirement in terms of optical characteristics. When the reflectance is high, image quality deterioration occurs due to malfunction (malfunction) of the liquid crystal panel or stray light. [0003] In recent years, due to higher brightness and higher definition of liquid crystal projectors, polarizing plates with lower reflection are desired. A wire-grid polarizer includes, for example, a reflective layer, a dielectric layer, and an absorbing layer, and uses the absorption effect (absorption effect) of the upper dielectric layer and the absorption layer and the interferen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G03B21/00
CPCG02B5/3058G02B5/3033G03B21/006
Inventor 高田昭夫
Owner DEXERIALS CORP