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Polarization plate and image display device

A technology of image display device and polarizing plate, applied in optics, polarizing element, nonlinear optics, etc., to achieve the effect of effective blocking, excellent electromagnetic wave shielding, and excellent light transmittance

Inactive Publication Date: 2017-08-29
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it cannot be said that the film is sufficient as an electromagnetic wave shielding material for information equipment having an image display device with a touch panel, such as a smartphone.

Method used

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  • Polarization plate and image display device
  • Polarization plate and image display device
  • Polarization plate and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Using a bar coater (manufactured by Daiichi Chemical Co., Ltd., product name "Barcoater No. 06"), the above-mentioned Metal nanowire dispersion liquid, and this coating film was dried at 100° C. for 2 minutes in a blower drier to form a conductive layer with a thickness of about 0.1 μm. In this way, a base material with a conductive layer formed of the base material and the conductive layer is produced. The total light transmittance of the substrate with the conductive layer was measured. The results are shown in Table 1.

[0115] On the other hand, a polarizing film with a thickness of 190 μm (polyvinyl alcohol film dyed with iodine; manufactured by Nitto Denko Co., Ltd., trade name “NPF-SEG1425DU”) and a cellulose triacetate film with a thickness of 80 μm (manufactured by Fujifilm Corporation, trade name name "TD80UL"). The aforesaid polarizing film is bonded on the surface opposite to the surface on which the conductive layer is formed on the aforementioned base m...

Embodiment 2

[0118] Using a sputtering device equipped with a sintered compact target containing 90% by mass of indium oxide and 10% by mass of tin oxide, on one surface of a cycloolefin-based resin film (manufactured by Zeon Corporation, trade name "ZEONORZF16-100") with a thickness of 100 μm, An indium tin oxide film was formed and heat-treated at 130° C. for 90 minutes to form an ITO film (conductive layer) with a thickness of about 0.1 μm. Table 1 shows the measured values ​​of the total light transmittance of the base material with the conductive layer.

[0119] In the same manner as in Example 1, a polarizing film and a cellulose triacetate film were bonded to the substrate with a conductive layer in Example 2, thereby producing a polarizing plate in Example 2.

[0120] Table 1 shows the surface resistance value and the measurement results of the shielding effect of the conductive layer of the polarizing plate.

Embodiment 3

[0122] Except that the bar coater was changed to "Barcoater No.08" manufactured by Daiichi Rika Co., Ltd., and the product name was "Barcoater No. 08", it was performed in the same manner as in Example 1 to form a conductive layer with a thickness of about 0.1 μm. After measuring the total light transmittance of the material, make a polarizing plate and measure its surface resistance and shielding effect. The results are shown in Table 1.

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Abstract

A polarization plate 1A of the present invention has a conductive layer 2 having a surface resistance value of 0.01-800 ohm / sq., a base material 3, and a polarization layer 4. Preferably, the conductive layer 2, the base material 3 and the polarization layer 4 are laminated in this order. A preferable conductive layer 2 has a total light transmittance equal to or more than 80 %. The polarization plate of the present invention has excellent electromagnetic wave shielding characteristics.

Description

technical field [0001] The present invention relates to a polarizing plate having excellent electromagnetic wave shielding properties and an image display device using the polarizing plate. Background technique [0002] In information devices with image display devices such as mobile phones, smartphones, portable game consoles, and tablet PCs, electromagnetic wave shielding processing is generally performed to prevent malfunctions between multiple devices or within devices due to electromagnetic noise. As such an electromagnetic wave shielding process, for example, an electromagnetic wave shielding material is disposed on or near an electromagnetic noise generating source such as an image display device. [0003] Patent Documents 1 and 2 disclose that the front surface of a display panel of a liquid crystal display device has a thickness of 3 μm or less, a transmittance of visible light of 78% or more, and a surface resistance value of 10. 3 ~10 12 Ω / sq. conductive polymer...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02F1/1333G02F1/1335
CPCG02B5/30G02F1/1333G02F1/1335G02B1/04
Inventor 长谷川由纪中藤彩美松田祥一古园井信行
Owner NITTO DENKO CORP
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