Touch screen without raised grains

Abstract

The utility model relates to the technical field of touch screens, in particular to a touch screen without raised grains, which comprises a PET (polyethylene terephthalate) base material, an ITO (indium tin oxide) layer arranged on the PET base material, a gluing layer wrapping the ITO layer and filling and leveling up gullies in the ITO layer, and a glass cover plate bonded with the gluing layer through an OCA (optical clear adhesive) colloid layer. According to the touch screen, the grooves in the ITO layers in the touch screen are filled, then the liquid OCA glue is fixed in the grooves in a UV curing mode, the grooves between the ITO layers are eliminated from the manufacturing source, deformation of the PET base material is avoided, and the touch screen without the grooves and the raised grains in the true sense is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to touch screen technical field, concretely is a kind of touch screen without wave. BACKGROUND

[0002] With the development of touch screen technology, the intuitiveness and convenience of human-computer interaction interface are more and more favored by the majority of consumers, and the market demand of large-size touch screen also rises sharply, and major touch screen manufacturers also invest in the research and development of large-size touch screen. The traditional large-size touch screen adopts nano silver or metal grid technology, but the product transmittance and durability are relatively poor. At present, major manufacturers also start to develop high-transmittance, high-definition, high-stability and low-resistance ITO film to make large-size touch screen.

[0003] And ITO is provided with ravines, such ITO ravines are indispensable to realize touch screen function, for effective isolation between channels, but the substrate of ITO film is pulled by OCA colloid squeezed into ravines, due to the softness of ITO film, after colloid sticking and pulling, ITO film PET substrate at ravine will be pulled and deformed, the visual contrast between ravine and ITO coating is obvious, that is, the wave phenomenon is serious, as shown in the accompanying Figure 4 .

[0004] But it is just because of the high transmittance and high definition of ITO film that the surface of the finished touch screen can see clear ITO ravines, which leads to the deformation of PET substrate, that is, the wave phenomenon in the industry, the current method to solve the wave phenomenon is mainly to do surface wrinkle treatment on the PET substrate of ITO film, and make the whole surface into wave form to reduce the resolution of human eye and achieve the effect of not seeing wave, but in fact, the wave is still there, so a touch screen without ravines and wave is needed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of touch screen without wave, to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of touch screen without wave, comprising:

[0008] ITO film, the ITO film includes PET substrate and ITO layer arranged on PET substrate;

[0009] glue coating, the glue coating wraps the ITO layer and fills the ravine in the ITO layer;

[0010] The glass cover plate and the glue layer are bonded through an OCA glue layer.

[0011] Preferably, the thickness of the glue layer between the OCA glue layer and the ITO layer is 0.05mm.

[0012] Preferably, the material of the glue layer is colorless, transparent and insulating liquid OCA glue.

[0013] Preferably, the PET substrate is further provided with a wire in communication with the ITO layer, an ACF provided on the wire, and an FPC provided on the ACF.

[0014] Preferably, the exposed part of the wire not covered by the glue layer and the ACF is provided with waterproof glue, and the FPC and the PET substrate are connected through glue dispensing.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The present application comprises a PET substrate and an ITO layer provided on the PET substrate. The liquid OCA glue which is colorless, transparent and insulating is used to fill the grooves in the ITO layer of the touch screen, and then the liquid OCA glue is fixed in the grooves through UV curing, so that the grooves between the ITO layers are eliminated from the source, the deformation of the PET substrate is avoided, and a touch screen without grooves and waves is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a sectional view of the present application

[0018] Figure 2 It is a position relationship diagram of the ITO film, the glue layer, the glass cover plate and the OCA glue layer of the present application

[0019] Figure 3 It is a working schematic diagram of pressing the glue layer of the present application

[0020] Figure 4 It is a state diagram of the PET substrate being pulled by the OCA glue

[0021] In the figure: 1, PET substrate; 2, ITO layer; 3, glue layer; 4, glass cover plate; 5, OCA glue layer; 6, glass substrate; 7, roller; 8, liquid OCA glue; 9, wire; 10, ACF; 11, FPC; 12, waterproof glue; 13, glue dispensing. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Please refer to Figures 1 to 4 The present application provides a technical scheme:

[0024] A touch screen without wave lines comprises:

[0025] An ITO film comprises a PET substrate and an ITO layer, the PET substrate 1 is provided with the ITO layer 2, the ITO layer 2 is provided with a ditch, and the ITO pattern for realizing the touch function is formed, and the ditch depth is about 100 nm.

[0026] A glue coating layer 3 is coated on the ITO layer 2, the ITO layer 2 is wrapped and the ditch in the ITO layer 2 is filled flat, the glue coating layer 3 is colorless, transparent and insulating glue, the material of the glue is liquid OCA glue 8, the main component is acrylic adhesive, the thickness of the glue coating layer 3 between the OCA glue body layer 5 and the ITO layer 2 is 0.05 mm, the PET substrate 1 provided with the ITO layer 2 is fixedly arranged on the glass substrate 6, the surface provided with the ITO layer 2 is arranged upward, the liquid OCA glue 8 is uniformly coated on the surface of the large-size PET substrate 1 with the ITO layer 2, the height and parallelism of the two rollers 7 are adjusted, the glass substrate 6 is aligned with the gap between the two rollers 7, the roller 7 is slowly rolled from the left side of the glass substrate 6 to the right side of the glass substrate 6, the glue coating consistency is realized, meanwhile, the liquid OCA glue 8 can fill the ITO ditch, finally, the PET substrate 1 coated with the liquid OCA glue 8 is pre-solidified by the UV furnace with the set parameters, the liquid OCA glue 8 is pre-solidified, the liquid OCA glue 8 is prevented from flowing, the thickness of the glue coating layer 3 is prevented from being uneven, and the appearance effect is affected.

[0027] A glass cover plate 4 is bonded between the glass cover plate 4 and the glue coating layer 3 through the OCA glue body layer 5.

[0028] The PET substrate 1 is further provided with a wire 9 in communication with the ITO layer 2, an ACF 10 arranged on the wire 9 and an FPC 11 arranged on the ACF 10, the material for manufacturing the wire 9 is silver paste, one end of the wire 9 is in communication with the ITO layer 2 and covered by the glue coating layer 3, the other end of the wire 9 is out of the glue coating layer 3 and in communication with the ACF 10, so that the FPC 11 is in communication with the ITO layer 2.

[0029] The exposed part of the wire 9 which is not covered by the glue layer 3 and the ACF 10 is provided with waterproof glue 12 to prevent the wire 9 from being oxidized, the FPC 11 and the PET substrate 1 are connected through the dispensing 13 to connect the FPC 11 and the PET substrate 1 and prevent the FPC 11 from being pulled apart during the assembly process.

[0030] Manufacturing process: the PET substrate 1 is subjected to aging treatment to make the ITO arrangement more orderly and compact, the dry film is pressed on the ITO film, the dry film is subjected to exposure and then etching and film removal, the ITO on the ITO film which is not needed is removed to make the ITO pattern which realizes the touch function, that is, the ITO trench is made to form the ITO layer 2, the silver paste is printed on the ITO film and then the second silver paste printing is performed and then baking is performed, the laser engraving silver paste forms the wire 9, the surface of the ITO film is cleaned, the liquid OCA glue 8 is coated on the surface of the ITO layer 2 and then the roller 7 is pressed to flatten and UV curing is performed to form the glue layer 3, the Sensor composed of the PET substrate 1, the ITO layer 2, the glue layer 3 and the OCA glue layer 5 is subjected to laser cutting to a preset shape, then Sensor testing and cleaning are performed, the preset shape can be reasonably set according to actual needs, then the ACF 10 pre-pressing and the FPC 11 hot-pressing are performed in sequence to make the FPC 11 and the wire 9 communicate, the waterproof glue 12 is applied on the wire 9 and FOG testing is performed, the glass cover plate 4 is pasted and defoaming is performed, the dispensing 13 is performed on the glass cover plate 4 and then cleaning is performed, the protective film is pasted on the glass cover plate 4 and then TP function testing is performed.

[0031] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A wave-free touch screen, characterized by The application relates to a touch screen, which comprises the following parts: an ITO film, which comprises a PET substrate and an ITO layer arranged on the PET substrate; a glue layer, which wraps the ITO layer and fills the gully in the ITO layer; a glass cover plate, which is bonded with the glue layer through an OCA glue layer.

2. A wave-free touch screen according to claim 1, wherein: The thickness of the glue layer between the OCA glue layer and the ITO layer is 0.05 mm.

3. A wave-free touch screen according to claim 2, wherein: The material of the glue layer is colorless, transparent and insulating liquid OCA glue.

4. A wave-free touch screen according to claim 3, wherein: The PET substrate is further provided with a wire in communication with the ITO layer, an ACF arranged on the wire and an FPC arranged on the ACF.

5. A wave-free touch screen according to claim 4, wherein: The exposed part of the wire, which is not covered by the glue layer and the ACF, is provided with waterproof glue, and the FPC and the PET substrate are connected through point gluing.

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