Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using same

A technology of base materials and display devices, applied in the direction of film/sheet adhesives, applications, adhesives, etc., can solve problems such as incorrect operation of control devices, thicker adhesive tapes, and increased conductivity of light-shielding layers, and achieve Reduces electrical conductivity, excellent light-shielding properties, and prevents erroneous operations

Inactive Publication Date: 2012-02-15
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, if the black ink coated on the white resin film is not completely dried and the black ink is recoated, the inorganic particles contained in the black ink will be repeatedly coated and not completely dried in the thickness direction. The coating layer is cut laterally. As a result, even if a plurality of light-shielding layers are laminated, pinholes are formed on the light-shielding layer in the state of being cut laterally in the thickness direction, and there is a problem that sufficient light-shielding properties cannot be ensured.
[0010] Therefore, as the number of repeated coatings of black ink on the white resin film increases, the possibility of pinhole problems in the light-shielding layer decreases, but the thickness of the light-shielding layer becomes thicker, so the thickness of the adhesive tape also changes. Thick, there is a problem that violates the expectation of thinning the display device of electronic equipment
[0011] In addition, when the colored pigment contained in the black ink forming the light-shielding layer is conductive, it has been confirmed that the conductivity of the light-shielding layer rises sharply when the thickness of the light-shielding layer exceeds a certain level, resulting in the following problems: the light-shielding layer There is an electric current flowing through it, and this electric current will become the cause of erroneous operation of the control device of the display panel of the display device

Method used

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  • Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using same
  • Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using same
  • Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] A colorless and transparent polyethylene terephthalate film (manufactured by Toray Co., Ltd., trade name “5AF53”) having a thickness of 4.5 μm was prepared as a transparent base material film 1 . It should be noted that the polyethylene terephthalate film does not contain any colored pigments. Moreover, corona discharge treatment was given to both surfaces of the transparent base film 1, and the surface tension of both surfaces of the transparent base film 1 was 50 mN / m.

[0111] A black ink (carbon black: 10% by weight) was prepared. The black ink consisted of 30 parts by weight of polyurethane resin (halogen element content: less than 50 ppm) as a binder, and the average particle diameter of a black colorant produced by a furnace method. It consists of 10 parts by weight of carbon black of 0.03 micrometers, and 60 parts by weight of the solvent which mixed ethyl acetate, toluene, and isopropanol.

[0112] A black ink was applied to one surface of the polyethylene ter...

Embodiment 2

[0118] Except that a light-shielding layer 2 with a thickness of 1 μm is formed on the two surfaces of the polyethylene terephthalate film 1 and is composed of a light-shielding base layer, the others are the same as in Example 1. Figure 4 Adhesive sheet B for display device assembly is shown.

Embodiment 3

[0120] The black ink was coated and dried on the light-shielding base layer integrated on one surface of the polyethylene terephthalate film 1, and this operation was performed once instead of repeating the above-mentioned operation in Example 1. 3 times to obtain the light-shielding base layer, forming a light-shielding layer with a thickness of 2 μm obtained by stacking and integrating two layers of light-shielding base layers. Except for this, the others are the same as in Example 1. Figure 4 Adhesive sheet B for display device assembly is shown.

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Abstract

Provided is a tape base material for assembling a display device, which has a superior light blocking effect and light reflectivity. In the tape base material (A) for assembling display device, a base material film (1) is provided, light blocking layers (2, 2) are integrally laminated on both sides of the film, and a light reflection layer (3) is integrally laminated on one of the light blocking layers (2). The light blocking layers (2, 2) are separately formed with the base material film (1) therebetween. Therefore, when pinholes are formed on each light blocking layer (2), since the pinholes have extremely small diameters, there is very little possibility that the pinholes formed on the respective light blocking layers (2) overlap each other, and thus, the light can be reliably blocked by the two light blocking layers (2, 2).

Description

technical field [0001] The present invention relates to a tape base material for assembling a display device, an adhesive sheet for assembling a display device and a display module unit (Display Module Unit) using the base material. Background technique [0002] In recent years, liquid crystal display devices have been widely used as display devices for electronic equipment such as mobile phones and electronic notebooks. As a liquid crystal display device used in the above-mentioned small electronic equipment, an edge-light type backlight type liquid crystal display device is used. [0003] For the liquid crystal display device of the above-mentioned side-light type backlight method, optical films such as a reflective sheet, a light guide plate, a diffusion sheet, and a prism sheet are generally provided in a laminated state in a synthetic resin backlight frame, and are passed through a tape for assembling the display device. The base material integrates the liquid crystal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/02B32B27/00B32B27/20C09J7/02G02F1/1335C09J7/29
CPCB32B3/266B32B27/06B32B27/16B32B2264/108B32B2307/40B32B2307/4026B32B2307/416B32B2405/00B32B2457/20C09J2203/318C09J2467/006C09J7/385C09J7/29G02F1/133509
Inventor 杉原拓道土居智深石孝嗣
Owner SEKISUI CHEM CO LTD
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