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Optical laminate and image display device

A technology of optical laminates and protective layers, which is applied in the direction of optics, identification devices, optical components, etc., can solve the problems of external light reflection and reflection, and achieve excellent anti-reflection effects

Active Publication Date: 2021-02-26
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in reality, due to the influence of the conductive layer forming process and the treatment to improve the toughness of the base material, even in an isotropic base material, some anisotropy will appear.
As a result, even if a circular polarizing film is installed, problems such as reflection of external light and reflection of the background may occur, which have not yet been resolved.

Method used

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  • Optical laminate and image display device
  • Optical laminate and image display device
  • Optical laminate and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Regarding the optical layered body having the structure shown in the following Table 1, an optical simulator (manufactured by Shintec Corporation, trade name "LCD Master V8") was used to evaluate the reflection characteristics of the optical layered body according to the front color phase a and b .

[0105] In addition, it is a configuration in which a light source (D65 light source registered in "LCD MasterV8") is arranged on the opposite side of the polarizing plate to the retardation layer, and a reflector is arranged on the opposite side of the base material to the retardation layer ( Ideal reflector registered in "LCD Master V8" Idea-Reflector).

[0106] In addition, the front hue a, b was calculated with the structure similar to Table 1 except not including a base material, and the result was used as a reference.

[0107] In this evaluation, the reflection characteristics of the optical layered body were evaluated by changing the slow axis angle of the base mater...

Embodiment 1-1

[0111] The angle formed by the slow axis of the substrate and the absorption axis of the polarizer of the polarizing plate was set to 90°. That is, the angle formed by the slow axis of the substrate and the slow axis of the retardation layer was set to 45°.

Embodiment 1-2

[0113] The angle formed by the slow axis of the substrate and the absorption axis of the polarizer of the polarizing plate was set to 0°. That is, the angle formed by the slow axis of the substrate and the slow axis of the retardation layer was set to -45°.

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Abstract

The present invention provides an optical laminate having an excellent antireflection function despite having a substrate having optical anisotropy (hereinafter also referred to as an anisotropic substrate). The optical laminated body of the present invention has a polarizing plate including a polarizer and a protective layer disposed on at least one side of the polarizer, a retardation layer, a conductive layer, and a substrate in this order, and the substrate has an in-plane retardation Re( 550) greater than 0 nm, the angle formed by the slow axis of the substrate and the slow axis of the retardation layer is -40°--50° or 40°-50°.

Description

technical field [0001] The present invention relates to an optical laminate and an image display device using the same. Background technique [0002] In recent years, with the popularization of thin displays, displays (organic EL display devices) equipped with organic EL (Electroluminescence, electroluminescence) panels have been proposed. Since the organic EL panel has a highly reflective metal layer, problems such as reflection of external light and reflection of the background are prone to occur. Therefore, it is known to prevent these problems by disposing the circular polarizing plate on the viewing side. On the other hand, a so-called in-cell touch panel type input display device in which a touch sensor is interposed between a display unit (such as an organic EL unit) and a polarizing plate is in high demand. The input display device having such a configuration can provide a user with a natural sense of input operation because the distance between the image display u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B32B7/023B32B27/36G02F1/1335G02F1/13363G09F9/30H01L27/32H01L51/50H05B33/02
CPCB32B27/36G02F1/1335G02F1/13363G02B5/30G09F9/30H05B33/02G02B5/305H10K59/8791B32B7/023H10K59/00H10K50/00
Inventor 角村浩武田健太郎饭田敏行
Owner NITTO DENKO CORP
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