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Method of manufacturing laminated polarizing plate, laminated polarizing plate obtained by the method, and image display including the same

A technology of an image display device and a manufacturing method, which can be applied to polarizing elements, transportation and packaging, other household appliances, etc., and can solve problems such as lowering of display quality.

Inactive Publication Date: 2006-07-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, when foreign matter such as dust adheres to the polarizing plate, even the foreign matter enters the focal depth of the magnifying lens system, so the outline of the foreign matter is also projected, thereby significantly degrading the display quality.

Method used

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  • Method of manufacturing laminated polarizing plate, laminated polarizing plate obtained by the method, and image display including the same
  • Method of manufacturing laminated polarizing plate, laminated polarizing plate obtained by the method, and image display including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (Production of Polarizer Film)

[0080] First, a polyvinyl alcohol film (thickness: 80 μm) was stretched 5 times in an iodine aqueous solution, and dried to produce a polarizer. Next, a UV urethane hard coat layer having a reflectance of 1% or less and a physical optical film (AR layer) are sequentially formed on one side of the triacetyl cellulose film (TAC film). Then, the TAC film after this treatment is laminated on one side of the above-mentioned polarizer respectively by the separation of the adhesive, and the untreated TAC film is laminated on the other side of the above-mentioned polarizer to make a polarizer film (thickness 195μm, light transmittance 45%).

[0081] (production of resin film)

[0082] In 100 parts by weight of 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate, add 120 parts by weight of methyl tetrahydrophthalic anhydride as a curing agent, respectively, as a curing agent. 2 parts by weight of tetra-n-butylphosphonium-O,O-diethyl pho...

Embodiment 2

[0095] In addition to using a cutting device (DFD651 cutting device, manufactured by DISCO Corporation) and a grinding wheel (blade, thickness 200 μm, trade name Z1110LS3#400, manufactured by DEISCO Corporation), the laminated body was cut at a rotation speed of 50,000 rpm and a speed of 100 mm / sec. Except for the rest, it was carried out in the same manner as in Example 1 to produce a laminated polarizing plate.

Embodiment 3

[0097] In addition to making the thickness of the resin film 300 μm, using a cutting device (DFD651 cutting device, manufactured by DISCO Corporation) and a grinding wheel (blade, thickness 200 μm, trade name Z1110LS3#400, manufactured by DEISCO Corporation), at a rotation speed of 50,000 rpm and a speed of 150 mm / sec. A laminated polarizing plate was produced in the same manner as in Example 1, except that the laminated body was cut in two separate cuts on the same line under the same conditions. In the above-mentioned cutting performed twice on the same line, the cutting depth of the first time and the cutting depth of the second time were both at a depth of 50 μm into the cutting tape. In addition, the order of cutting is the order of X-axis direction→Y-axis direction→X-axis direction→Y-axis direction. The X-axis direction is a polarization axis or an absorption axis, and the Y-axis direction is a direction perpendicular to the X-axis direction.

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Abstract

The present invention provides a method of manufacturing a laminated polarizing plate that can prevent projections and swellings from being produced at cutting planes in manufacturing the laminated polarizing plate that is excellent in self-standing ability. A polarizing plate and a resin film are laminated together and then this laminate is cut with a dicer. Thus a laminated polarizing plate is manufactured. A film having a light transmittance of at least 80% and a glass-transition temperature of at least 100 DEG C. is used for the resin film. For instance, an epoxy resin film is preferable as the resin film.

Description

technical field [0001] The present invention relates to a method for manufacturing a laminated polarizing plate, a laminated polarizing plate produced therefrom, and an image display device using the same. Background technique [0002] In liquid crystal display devices, polarizers are generally bonded to both sides of the liquid crystal cell. However, when a liquid crystal cell to which a polarizing plate is stuck in this way is applied to a viewfinder of a video camera, a digital camera, or a projector, the following problems arise. [0003] The above-mentioned viewfinder and projector etc. take the form that the light source is irradiated from the back of the liquid crystal cell, and the illuminated image is magnified and projected through the magnifying lens system arranged in front of the liquid crystal cell. Therefore, the focus of the above-mentioned magnifying lens generally falls on the color filter arranged inside the liquid crystal unit, but due to the close conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02B5/3041B32B27/08Y10T428/261C09K2323/02C09K2323/03G02F1/1335B32B2307/42B32B38/0004B32B27/306B32B27/308B32B2457/202B32B27/38B32B2551/00
Inventor 稗田嘉弘赤田祐三
Owner NITTO DENKO CORP