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Folding-type display and portable terminal device

A display and folding technology, applied in chemical instruments and methods, instruments, electrical digital data processing, etc., can solve the problems of pencil hardness reduction, image distortion, film deformation, etc., and achieve the effect of excellent convenience and resistance to scratches

Pending Publication Date: 2020-12-08
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a foldable display, since the portion that is a constant folded portion is repeatedly bent, the film at this portion is deformed over time, and there is a problem that the image displayed on the display is distorted.
[0007] In addition, a method of making the thickness of the tucked-in part and the non-tucked-in part different has been proposed, and although the bending resistance of the thinner part of the film is improved, there is a problem that the pencil hardness decreases (see Patent Document 1).

Method used

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  • Folding-type display and portable terminal device
  • Folding-type display and portable terminal device
  • Folding-type display and portable terminal device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Coat polyimide-based resin coating solution 1 on one side of polyethylene terephthalate film No. 3 with a Meyer rod so that the film thickness after drying becomes 2.0 μm, and dry at 120°C For 1 minute, a cured layer of polyimide resin was obtained. Next, on the cured layer of the polyimide resin, apply the hard coat coating liquid 2 with a Meyer rod so that the film thickness after drying becomes 10 μm, dry at 80° C. for 30 seconds, and then irradiate ultraviolet rays (cumulative light intensity 200mJ / cm 2 ) to obtain a hard coating film.

Embodiment 2～5、 comparative example 1～3

[0121] By the same method as in Example 1, a hard coat film was produced under the conditions shown in Table 2.

[0122] The produced film is bonded to an organic EL device with a 25 μm thick adhesive layer to form a figure 1 It is a smart phone-type folding display that can be folded in two at the center of the whole with a radius of 3 mm, which is equivalent to the bending radius. The hard coat film is arranged on the surface of one continuous display with the folded portion interposed so that the hard coat layer is located on the surface of the display. When the hard coat film of each Example is used, the operation and visibility as a smartphone that can be folded and moved by folding in two at the central part are satisfied. On the other hand, the foldable displays using the hard coat films of Comparative Examples 2 and 3 are not preferable because image distortion gradually occurs at the folded portion of the display as the frequency of use increases. In addition, Comp...

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Abstract

[Problem] To provide: a folding-type display which has excellent mass productivity and in which repeated folding does not result in disturbance of an image displayed on the folded part; and a portableterminal device on which this folding-type display is mounted. [Solution] This folding-type display is obtained by disposing a hard coat film on at least a part of the surface, wherein the hard coatfilm uses a polyester film having an intrinsic viscosity of 0.65-1.0 d1 / g as a base material film. A polyimide-based resin cured layer having a thickness of 0.5-3.0 microns and a hard coat layer are provided, in that order, on at least the surface side of the folding-type display in the base material film.

Description

technical field [0001] The present invention relates to a foldable display and a mobile terminal device, and relates to a foldable display and a mobile terminal device in which image distortion caused by deformation of a film on the surface is unlikely to occur even if folded repeatedly, and the film surface has a high hardness. Background technique [0002] The thin film lightweight of mobile terminal equipment is promoted, and mobile terminal equipment represented by smart phones is widely popularized. Various functions are required for mobile terminal devices, and convenience is also required conversely. Therefore, popular mobile terminal devices are predicated on the premise that they can be easily operated with one hand and can be further stored in a pocket of clothing. Therefore, a small screen size of about 6 inches is sometimes required. [0003] On the other hand, it is assumed that a tablet terminal with a screen size of 7 inches to 10 inches is used not only for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/00B32B27/34B32B27/36G09F9/30
CPCG09F9/00B32B27/36B32B27/34G09F9/30G06F1/1652G02B1/04G02B1/14C08L33/24C08L67/00
Inventor 本乡有记小川真由惠岛明纪
Owner TOYOBO CO LTD
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