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Optical laminate, display panel, and display device

A technology for display panels and display devices, applied in optics, identification devices, optical components, etc., can solve problems such as screen coloring, and achieve the effect of suppressing visibility deterioration

Active Publication Date: 2020-09-25
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a problem of screen coloring caused by external light reflection even when the power is turned off

Method used

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  • Optical laminate, display panel, and display device
  • Optical laminate, display panel, and display device
  • Optical laminate, display panel, and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0160] Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited by these examples.

[0161] Make the following image 3 or Figure 4 For the samples with the layer configuration shown, the type of retardation layer and the surface reflectance of the antireflection layer were changed, and L* and a* were measured with a spectrocolorimeter CM-2600d (Konica Minolta, Inc.) in the SCI method. and the value of b*. L* and chroma are shown in the table below.

[0162] The layers used are as follows.

[0163] Each layer used in the examples is as follows.

[0164] · Aluminum foil: Among the glossy surface and the matte surface, the glossy side was used as the optical layered body side.

[0165] ・Adhesive layer: Optical adhesive 10μm thick product manufactured by Lintec Co., Ltd.

[0166] ・λ / 4 retardation plate (positive dispersion (α=1.11), Re550=140nm)

[0167] ・λ / 2 retardation...

experiment example 1

[0187] In Experimental Example 1, the angle formed by the absorption axis of the polarizing element and the orientation axis of the positive dispersion λ / 4 retardation film was set to 45°.

[0188] In addition, in Experimental Example 2, the angle formed by the absorption axis of the polarizing element and the orientation axis of the flat dispersion λ / 4 retardation film was set to 45°.

experiment example 3

[0189] In Experimental Example 3, the angle formed by the absorption axis of the polarizing element and the orientation axis of the positive dispersion λ / 4 retardation plate is set to 75°, and the angle formed by the orientation axis of the positive dispersion λ / 2 retardation plate is The angle is set to 15°.

[0190] Furthermore, in Experimental Example 4, the angle formed by the absorption axis of the polarizing element and the orientation axis of the flat dispersion λ / 4 retardation plate was set to 75°, and the angle formed by the orientation axis of the flat dispersion λ / 2 retardation plate was 75°. The formed angle is set to 15°.

[0191] In Experimental Examples 5 and 6, the angle formed by the absorption axis of the polarizing element and the orientation axis of the reverse dispersion λ / 4 retardation plate was set to 45°.

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Abstract

Provided is an optical laminate capable of providing a display panel in which deteriorated visibility caused by reflected color is suppressed. Further provided are: a display panel equipped with the optical laminate; a display device equipped with the optical laminate; and an anti-reflection layer, a circularly polarizing plate, a retardation plate, and a polarizing plate used in the display panel. An optical laminate characterized by comprising: a circularly polarizing plate having a retardation plate and a polarizer; and an anti-reflection layer having a surface reflectance of 2% or less, wherein the anti-reflection layer is provided to the polarizer side of the circularly polarizing plate, L* in the SCI mode for light incident from the anti-reflection layer side is 20 or less, and the saturation is 20 or less.

Description

technical field [0001] The present invention relates to an optical layered body, a display panel, and a display device. Background technique [0002] In recent years, various display devices have been increasing in size and portability, and as a result, it is required to have a good color tone under various observation environments. [0003] Patent Document 1 discloses an organic electroluminescent light source device that suppresses changes in color tone due to viewing angles. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open No. 2009-231257 Contents of the invention [0007] The problem to be solved by the invention [0008] The inventors of the present invention have found that in a display device having an optical layered body having a circularly polarizing plate provided with an antireflection layer, the visibility of a displayed image deteriorates due to reflection of light incident from the antireflecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/11G09F9/00G09F9/30H01L27/32H01L51/50H05B45/00
CPCH05B33/02G02B1/11G09F9/00G09F9/30G02B5/3083G02B5/3033H10K59/8791H10K59/50H10K50/86
Inventor 藤田贤治黑田刚志
Owner DAI NIPPON PRINTING CO LTD
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