TWM510474U - Touch panel structure - Google Patents

Abstract

Disclosure is related to touch panel structure, in which the layers inside may be made by a screen-printing method. According to one embodiment, the essential elements of the touch panel structure are a panel layer appeared to be a visual front appearance of the device adopting this touch panel structure, a touch sensitive module layer, a functional over-coating layer between the panel layer and the touch sensitive module layer, and a protective layer adjacent to the touch sensitive module layer. The protective layer is such as anti-reflection layer. Further, a hard coating layer may be applied to the surface of the panel layer for strengthening the touch panel structure. The functional over-coating layer may be a high-refractivity material formed by the screen-printing method.

Description

Touch panel structure

The present invention is a touch panel structure, in particular, a touch panel structure having a plurality of functional layers.

One of the structure of the touch panel of the prior art can refer to the structural diagram shown in FIG. 1 , wherein the display module 101 including a backlight, a liquid crystal module (LC) and the like is displayed below, and then an optical glue (Optical Clear Adhesive) , OCA) 102 is combined with the upper touch panel.

In this example, the touch sensing module is formed on the two-layer plastic substrate, and includes a first touch sensing layer 103 and a second touch sensing layer 105, which can be in two different directions (such as X). , Y) electrode structure, the optical glue 104 can be bonded between the two layers. Thereafter, the illustrated second touch sensing layer 105 and the surface protective layer (eg, glass, plastic, etc.) 108 may be joined by the optical glue 106, and may include some slits. In actual production, conventional techniques may form some ink layers 107 of brand names, symbols or decorative patterns under the surface protective layer 108.

FIG. 2 is a schematic view showing the structure of a touch panel of another prior art. The touch panel structure is disposed on the display module 201. The two are bonded by an optical adhesive 202. The glass or plastic material can be displayed in this example. Forming the sensing electrodes in different directions on the substrate. For example, transparent sensing electrodes (such as ITO) in different directions are formed on both sides of a glass or plastic substrate.

The touch sensing layer 203 is added to the upper structure through the optical adhesive 204, and the characteristics including the transparent optical adhesive 204 are closely combined with the surface protective layer 206 in the drawing, and the ink layer 205 formed by the printed pattern can be formed.

FIG. 3 again shows a schematic structural view of a touch panel of another prior art. This example shows that the touch sensing layer 304 and the ink layer 305 formed by the printed pattern are formed under the surface protective layer 306, and the anti-explosion prevention is formed under the surface. The membrane 303 is broken. Then, it is combined with the display module 301 through the optical adhesive 302.

As can be seen from the above-mentioned prior art, optical adhesives (OCAs) often act as media between different structural layers, including bonding, stabilizing structures, and filling gaps.

Different from the conventional technology, in the structure of the touch panel, most of the optical adhesive or the filling material is used as the material for combining the layers. The present invention proposes a touch panel structure, in which several functional films are specially provided, among which It can provide the function of the overall structure of the panel structure to be strong, high refractive index or explosion-proof, and the embodiment can also adopt a more efficient screen printing process in the process.

The main structural components of the touch panel structure disclosed in the disclosure include a panel layer that exhibits a frontal visual appearance of a device using a touch panel structure, a touch sensing module layer for sensing a touch event, and a panel layer and a touch layer. A functional coating between the sensing module layers and a protective layer adjacent to the other side of the functional sensing layer of the touch sensing module layer.

In one embodiment, a hard coat layer may be formed on the panel layer to strengthen the structure of the touch panel structure; the functional coating layer is formed by printing a high refractive index material, or may be an explosion-proof film, or may provide a whole A refractive index matching structural layer of the touch panel structure. The protective layer can be an antireflection layer with high transmittance.

In another embodiment, the touch panel structure includes a touch sensing module layer for sensing a touch event, a functional coating layer bonded to the outer side of the touch sensing module layer, and a display using the touch panel. Panel with a frontal visual appearance of the structure of the device Layer, and a protective layer adjacent to the touch sensing module layer.

Wherein, the hard coating layer of the reinforcing structure may be formed on the functional coating layer, the functional coating layer is formed by printing a high refractive index material, or is an explosion-proof film, or may be a structural layer providing an index matching of the overall touch panel structure. . The protective layer can be an antireflection layer having a high transmittance.

In order to further understand the techniques, methods and effects of this creation in order to achieve the intended purpose, please refer to the following detailed descriptions and diagrams of this creation. I believe that the purpose, characteristics and characteristics of this creation can be deepened and specific. The drawings and the annexes are provided for reference and description only, and are not intended to limit the present invention.

101‧‧‧ display module

102,104,106‧‧‧Optical adhesive

103‧‧‧First touch sensing layer

105‧‧‧Second touch sensing layer

107‧‧‧Ink layer

108‧‧‧Surface protection layer

201‧‧‧ display module

202,204‧‧‧Optical adhesive

203‧‧‧Touch sensing layer

205‧‧‧Ink layer

206‧‧‧Surface protection layer

301‧‧‧ display module

302‧‧‧Optical adhesive

303‧‧‧Anti-rupture film

304‧‧‧ touch sensing layer

305‧‧‧Ink layer

306‧‧‧Surface protection

401‧‧‧First coating

402‧‧‧Electrode structure

403‧‧‧Second coating

404‧‧‧Ink layer

405‧‧‧ panel layer

501‧‧‧First coating

502‧‧‧First electrode structure

503‧‧‧Second coating

504‧‧‧Second electrode structure

505‧‧‧ third coating

506‧‧‧Ink layer

507‧‧‧ panel layer

601‧‧‧ display module

602‧‧‧Optical adhesive

603‧‧‧Protective layer

604‧‧‧Touch sensor module layer

605‧‧‧ functional coating

606‧‧‧Ink layer

607‧‧‧ panel layer

608‧‧‧hard coating

701‧‧‧ display module

702‧‧‧Optical adhesive

703‧‧‧Protective layer

704‧‧‧ panel layer

705‧‧‧Touch sensor module layer

706‧‧‧Ink layer

707‧‧‧ functional coating

708‧‧‧hard coating

801‧‧‧First touch sensing layer

802‧‧ ‧ isolation layer

803‧‧‧Second touch sensing layer

1 is a schematic structural view of a touch panel of the prior art; FIG. 2 is a schematic structural view of another touch panel of the prior art; FIG. 3 is a schematic structural view of a touch panel of another prior art; One embodiment of the structure of the control panel; FIG. 5 is a schematic view showing the second embodiment of the structure of the touch panel; FIG. 6 is a schematic diagram showing an embodiment of the touch panel structure applied to the display module; The touch panel structure of the present invention is applied to the second embodiment of the display module. FIG. 8 shows an embodiment of the touch sensing module layer in the structure of the touch panel.

The present invention proposes a touch panel structure, the main structure is a touch sensing circuit disposed on the display module, a surface visually presented panel, and some structurally necessary protective structures for bonding and stabilizing structures between the layers. Optical glue.

First embodiment:

According to the embodiment disclosed in the disclosure, reference may be made to one of the embodiments of the inventive touch panel structure shown in FIG.

The embodiment shows that the touch panel structure includes several main structural components, such as a first over-coating 401 disposed near the display panel. The main function of the coating layer is a protective structure, and is disposed in the touch panel structure. It should have high light transmittance characteristics (such as can be matched with a high refractive index, materials such as TiO ₂ ), and the first coating layer 401 can be formed by processes such as yellow etching, sputtering, and roller printing. However, it is not excluded to form the coating layer by other processes.

The first covering layer 401 is disposed on one side of the sensing electrode layer composed of the electrode structure 402, and the second covering layer 403 is formed on the other side of the structure to which the electrode structure 402 belongs, which is also high in light transmittance. The material is formed by a printing process (such as screen-printing) directly on the sensing electrode layer provided with the electrode structure 402 in the structure. This example is schematically shown as an electrode structure 402, and the electrode structure 402 can be simultaneously coated with the second layer. Layer 403 is produced in a printing process.

The uppermost layer of this example is a panel layer 405, which can be a glass or plastic substrate. The ink layer 404 can be formed on the second covering layer 403 in a printing manner and covers the panel layer 405 to form a decorative appearance of the device or a pattern of a specific prompting function.

In the schematic diagram of the structure, the first covering layer 401 and the second covering layer 403 may be formed by a structure having a specific function, for example, a high refractive index material having high light transmittance, or an explosion-proof function may be used to ensure the use of the touch. The device of the control panel structure does not burst under improper use or environment. The first covering layer 401 and the second covering layer 403 may have a gap or a difference in distance when the layers are combined, including providing adhesion between the layers.

Moreover, the first cladding layer 401 and the second cladding layer 403 do not exclude the use of planarization or/or index matching for providing an overall device.

Second embodiment:

FIG. 5 is a schematic diagram showing the second embodiment of the structure of the touch panel of the present invention. The cover layer 501 is a protective structure disposed in combination with a display module (not shown in this example), and has a high refractive index for achieving high light transmittance, and may have an explosion-proof effect.

The touch sensing module of this example is composed of the sensing electrode structures (the first electrode structure 502 and the second electrode structure 504) disposed on both sides of the second covering layer 503, and the function of the second covering layer 503 is isolated. An electrode structure 502 and a second electrode structure 504. Further, a third covering layer 505 is coated on the upper side, and a material having characteristics such as high refractive index, explosion-proof, adhesion, and the like, such as TiO ₂ , is particularly required when combined with the panel layer 507. The ink layer 506 formed on the third coating layer 505 can be printed and presented through the outermost panel layer 507 of the device.

Similarly, the first covering layer 501, the second covering layer 503 and the third covering layer 505 of this example can have the characteristics of high refractive index, and can also be used for joining the layers, including filling the differences between the layers. Flattening is achieved, either by filling the voids or/or with a structural layer that matches the refractive index of the overall device.

According to an embodiment, the first covering layer 501 may be formed by roll stamping and may be rolled together with the first electrode structure 502 above it. The second and third coating layers (503, 505) are preferably formed by a screen printing process, but are not excluded by yellow etching or sputtering techniques.

The formation of the electrode structure in the embodiment of FIG. 5 and the foregoing embodiment of FIG. 4 can be performed by a rolling or screen printing process, wherein the material can be, for example, a conductive polymer, a carbon nanotube (CNT) or a wire.

Third embodiment:

One of the cross-sectional views of an embodiment of the present invention in which the touch panel structure is applied to a display module can be seen in FIG. Below the figure is a display module 601, such as a liquid crystal display module with a liquid crystal (LC) as a main component, which is combined with the touch panel structure of this example through an optical adhesive 602. In particular, the structural layer can be produced by a screen printing process.

In the touch panel structure shown, the touch sensing module layer 604 is mainly used to sense touch events, and includes a touch sense that can integrate the touch sensing electrodes and the substrate. The layer, as described in the foregoing embodiment, forms a sensing electrode structure with different sensing directions on two sides of a glass or plastic substrate; and the touch sensing module layer 604 of two layers of sensing electrode layers respectively can be used. The layer sensing electrode layer will be separated by an isolation layer, mainly separating the electrical signals of the two layers. In another embodiment, the touch element (sensing electrode) is integrated with a substrate (such as glass) to form a touch sensing electrode structure formed by a One Glass Solution (OGS) process.

One of the embodiments of the touch sensing module layer 604 can be seen in FIG. The figure shows a first touch sensing layer 801 and a second touch sensing layer 803, and an intermediate insulating layer 802. The insulating layer 802 is, for example, an insulation coating.

A protective layer 603 is formed on a side of the touch sensing module layer 604 and the lower display module 601. The protective layer 603 is adjacent to the other side of the touch sensing module layer 604 with respect to the functional coating layer 604. One of the examples may be an antireflection layer having a high transmittance.

The touch sensing module layer 604 is structured with a functional coating layer 605 that can be bonded to the upper panel layer 607. The panel layer 607 is a frontal visual appearance of the device using the touch panel structure.

The functional coating layer 605 functions as a protective structure, and can function as an adhesion between the structural layers, and includes a high refractive index material as in the foregoing embodiment, which can have high light transmittance and explosion-proof function (explosion-proof film). The functional coating layer 605 can be a structural layer that provides an index matching of the overall touch panel structure, and can actually implement one or a combination of functions of these functions, and can be printed in particular. The process forms this functional coating 605.

According to one embodiment, as shown in FIG. 6, the touch panel structure may further include a hard coating 608 formed on the icon sheet 607, and the hard coating layer 608 is used to strengthen the panel layer. 607 structure, and includes the structure of the reinforced touch panel structure. The panel layer 607 material is often made of a PET (Polyethylene terephthalate) substrate, and in the thinned panel design, the hard coat layer 608 can be utilized as one of the solutions for the reinforced structure. One of the embodiments of the hard coat 608 fabrication is on the panel layer 607 or other structural surfaces in different embodiments are subjected to a hardening process such that the entire surface of the structure forms a hard coating layer which may be formed by covering a layer of hardness enhancing liquid which is scratch resistant Functional layer with wear resistant.

In a particular embodiment, an ink layer 606 that presents a pattern can be fabricated in the functional coating layer 605, depending on the needs of the device being fabricated.

The protective layer 603 of this example, such as an anti-Reflection layer, can improve the transmittance because the two surfaces of general optical components (such as glass, transparent acrylic, etc.) may reflect incident light. Therefore, it is possible to cause two or more light rays of different optical paths, and thus, as one of the embodiments, an antireflection coating having a reduced reflectance can be coated or plated on the optical element. In the technique disclosed in the disclosure, the light generated by the internal liquid crystal display module can be emitted at a high transmittance.

Fourth embodiment:

The structure of the touch panel structure is applied to the display module as shown in FIG. 7 . The structure of the touch panel is different from the structure of the embodiment shown in FIG. 6 . The touch panel structure is formed on the display module 701 . And the optical glue 702 combines both.

In this example, the panel layer 704 is disposed between the lower protective layer 703 and the touch sensing module layer 705. Similarly, the protective layer 703 may be an antireflection layer having a high transmittance.

In the touch panel structure, the touch sensing module layer 705 is used to sense the touch event, and the touch sensing module layer 705 can also be a touch sensing layer integrated with the touch sensing electrode and the substrate; or It is composed of two layers of sensing electrodes, such as transparent conductive electrodes such as ITO formed on different substrates, and separated by two layers. A schematic diagram of one of the embodiments can be seen in FIG.

The functional coating layer 707 is bonded to one side of the touch sensing module layer 705. The ink layer 706 may be formed and directly bonded to the hard coating layer 708 for strengthening the touch panel structure. The functional coating layer 707 preferably has high light transmittance, is formed by printing a high refractive index material; or may have an explosion-proof function; or may be used to fill the step; or may provide adhesion to adjacent layers; and may be used as a flattening Or / with the overall structure of the fold Shooting rate matching.

The outermost layer of the structure is provided with a panel layer 708 that presents the frontal visual appearance of the device employing the touch panel structure.

Therefore, in the touch panel structure described in the foregoing disclosure, the main feature is to impart one or more functions in the layer structures in which the bonding is performed, thereby allowing the entire panel structure to operate more efficiently.

The above is only a preferred embodiment of the present invention, and all changes and modifications made by the scope of the patent application of the present invention are within the scope of the present invention.

401‧‧‧First coating

402‧‧‧Electrode structure

403‧‧‧Second coating

404‧‧‧Ink layer

405‧‧‧ panel layer

Claims (16)

A touch panel structure includes: a panel layer that presents a frontal visual appearance of the device using the touch panel structure; a touch sensing module layer for sensing a touch event; and a functional coating layer bonded to the panel layer And a layer of the touch sensing module adjacent to the other side of the functional coating layer; The touch panel structure of claim 1 further includes a hard coat layer formed on the panel layer for reinforcing the structure of the touch panel structure. The touch panel structure of claim 1, wherein the touch sensing module layer is a touch sensing layer integrated with the touch sensing electrode and the substrate. The touch panel structure of claim 1, wherein the touch sensing module layer is composed of two layers of sensing electrodes and an isolation layer, wherein the isolation layer separates the two layers of sensing electrodes. The touch panel structure of claim 3 or 4, wherein the functional coating is formed by printing a high refractive index material. The touch panel structure of claim 5, wherein the functional coating layer is further an explosion-proof film. The touch panel structure of claim 5, wherein the functional coating layer is a structural layer that provides an index matching of the overall touch panel structure. The touch panel structure according to claim 7, wherein the protective layer is an antireflection layer having high transmittance. A touch panel structure includes: a touch sensing module layer for sensing a touch event; a functional coating layer bonded to one side of the touch sensing module layer; and a touch panel structure a panel layer having a frontal visual appearance of the device, engaging the touch sensing module layer with respect to the other side of the functional coating layer; And a protective layer adjacent to the touch sensing module layer. The touch panel structure of claim 9 further comprising a hard coat layer formed on the functional cover layer for reinforcing the surface structure of the touch panel structure. The touch panel structure of claim 9, wherein the touch sensing module layer is a touch sensing layer integrated with the touch sensing electrode and the substrate. The touch panel structure of claim 9, wherein the touch sensing module layer is composed of two layers of sensing electrodes combined with an isolation layer, wherein the isolation layer separates the two layers of sensing electrodes. The touch panel structure of claim 11 or 12, wherein the functional coating is formed by printing a high refractive index material. The touch panel structure of claim 13, wherein the functional coating layer is further an explosion-proof film. The touch panel structure of claim 14, wherein the functional coating layer is a structural layer that provides an index matching of the overall touch panel structure. The touch panel structure according to claim 15, wherein the protective layer is an antireflection layer having high transmittance.