WO2019024216A1

WO2019024216A1 - Method for attaching panel and touch-sensitive layer, and touchscreen

Info

Publication number: WO2019024216A1
Application number: PCT/CN2017/103880
Authority: WO
Inventors: 李明麟; 李学才; 叶丹霞; 巫文胜; 覃洪高
Original assignee: 意力(广州)电子科技有限公司
Priority date: 2017-08-04
Filing date: 2017-09-28
Publication date: 2019-02-07
Also published as: CN109375798A

Abstract

A method for attaching a panel and a touch-sensitive layer, as well as a touchscreen, wherein said method for attaching a panel (100) and a touch-sensitive layer (200) comprises the following steps: S1: the panel (100) comprises a display region (110) and a non-display border region (120) that is located on the periphery of said display region (110); said display region (1101) corresponds to a viewable region (210) of the touch-sensitive layer (200), and said non-display border region (120) corresponds to a wiring region (220) of the touch-sensitive layer (200); said non-display border region (120) has a pre-set color, while a colored shielding ink (300) is coated on the wiring region (200) of the touch-sensitive layer (200), the color of said shielding ink (300) being the same as the color of said non-display border region (120); S2: attaching the panel (100) and said touch-sensitive layer (200). Said method for attaching a panel and a touch-sensitive layer, as well as said touchscreen, may prevent the wiring region of the touch-sensitive layer from being exposed, improving the unappealing appearance of products.

Description

Method for bonding panel and touch sensing layer and touch screen

Technical field

The present invention relates to the field of touch screen technologies, and in particular, to a method for bonding a panel and a touch sensing layer and a touch screen.

Background technique

Generally, the touch screen includes a touch sensing layer and a panel, and the touch screen needs to be attached to the touch sensing layer during the manufacturing process. Conventionally, when the panel is attached to the touch sensing layer, tolerances may be imposed due to the influence of the precision of the bonding device and the bonding environment. In particular, for a touch screen product with a narrow bezel, when the tolerance of the bonding device is greater than the tolerance of the touch sensing layer, the wiring area of the touch sensing layer may be exposed, resulting in poor appearance of the product.

Summary of the invention

Therefore, it is necessary to provide a method for bonding a panel and a touch sensing layer and a touch screen. The bonding method of the panel and the touch sensing layer and the touch screen can prevent the exposed area of the touch sensing layer from being exposed. Improve the appearance of products.

Its technical solutions are as follows:

A method for bonding a panel and a touch sensing layer includes the following steps:

S1: The panel includes a display area and a non-display border area located at a periphery of the display area, where the display area corresponds to a visible area of the touch sensing layer, and the non-display border area corresponds to a trace area of the touch sensing layer. The non-display bezel area has a preset color, and a color-blocking ink is applied to the routing area of the touch sensing layer, and the color of the blocking ink is the same as the color of the non-display bezel area;

S2: bonding the panel to the touch sensing layer.

In one embodiment, in the step S1, the specific steps of applying the color-blocking ink in the routing area of the touch sensing layer are:

S11: printing a color-blocking ink on the trace area of the touch sensing layer by using a printing machine;

S12: The printed occlusion ink is cured by an IR hot oven.

In one of the embodiments, the printer has a doctor blade pressure of 30 Kgf ± 10 Kgf and the printer blade speed of 150 mm/s ± 50 mm/s.

In one embodiment, the curing parameter of the IR thermal oven for curing the printed masking ink is: heat curing at 140 ° C ± 5 ° C for 60 s ± 20 s.

In one embodiment, the masking ink coating covers the entire area of the wiring area of the touch sensing layer; or the blocking ink is coated on the wiring area of the touch sensing layer. Control one side of the visible area of the sensing layer.

In one embodiment, before the step S1, the method further comprises the steps of:

S0: Printing insulating ink in the wiring area of the touch sensing layer.

In one embodiment, between the step S1 and the step S2, the method further includes the steps of:

S1a: a protective film is attached to the touch sensing layer.

In one embodiment, the specific steps of step S2 are:

S21: depositing an adhesive layer on the touch sensing layer;

S22: Pressing the touch sensing layer on the panel by using a bonding device.

A touch screen includes a touch sensing layer and a panel, the touch sensing layer includes a visible area and a routing area located at a periphery of the visible area, the panel includes a display area and is located at a periphery of the display area The non-display border area corresponds to the visible area of the touch sensing layer, the non-display border area corresponds to the line area of the touch sensing layer, and the non-display border area has a pre-display area A color is provided, and the wiring area is coated with a color blocking ink, and the color of the blocking ink is the same as the color of the non-display border area.

In one of the embodiments, the panel is a transparent glass substrate, plexiglass or plastic.

The beneficial effects of the invention are:

a method for bonding the panel and the touch sensing layer, by applying a color blocking ink to the wiring area of the touch sensing layer, so that the blocking ink covers the wiring area of the touch sensing layer, and the shielding is set The color of the ink is the same as the color of the non-display frame area of the panel. After the panel is attached to the touch sensing layer, even if there is a fitting tolerance between the panel and the touch sensing layer, the exposed portion of the wiring area is due to the fitting tolerance. The color is the same as the color of the non-displayed border area of the panel. The exposed area of the wiring area and the non-displayed border area appear to be a whole. It does not seem to have the exposed area of the wiring area, which can effectively avoid the touch. The leakage of the sensing layer in the wiring area improves the appearance of the product.

In the touch screen, the wiring area of the touch sensing layer is coated with a color blocking ink, and the blocking ink can cover the wiring area of the touch sensing layer, and block the color of the ink and the non-display border area of the panel. The color is the same, and after the panel is attached to the touch sensing layer, even if there is a fitting tolerance between the panel and the touch sensing layer, the color of the exposed portion of the wiring area due to the fitting tolerance is the same as the color of the non-display border area of the panel. The exposed area of the wiring area and the non-displayed border area appear to be a whole. It does not seem to have the exposed area of the wiring area, which can effectively avoid the leakage of the touch sensing area and improve the leakage area. Poor appearance of the product.

DRAWINGS

1 is a schematic flow chart 1 of a method for bonding a panel and a touch sensing layer according to an embodiment of the present invention;

2 is a schematic view showing a bonding method of a bonding method of a panel and a touch sensing layer according to an embodiment of the present invention;

3 is a schematic diagram 1 of a manufacturing structure of a touch sensing layer according to an embodiment of the present invention;

4 is a schematic diagram of a stacked structure of a panel and a touch sensing layer according to an embodiment of the invention;

FIG. 5 is a second schematic diagram of a method for bonding a panel and a touch sensing layer according to an embodiment of the invention.

Description of the reference signs:

100, panel, 110, display area, 120, non-display border area, 200, touch sensing layer, 210, visible area, 220, wiring area, 230, conductive layer RX, 240, conductive layer TX, 300, occlusion Ink, 400, adhesive layer, 500, insulating ink.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items. The terms "first," "second," and the like, as used herein, are used herein to distinguish between objects, but such objects are not limited by these terms.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , a method for bonding a panel 100 and a touch sensing layer 200 includes the following steps:

S1: The panel 100 includes a display area 110 and a non-display frame area 120 on the periphery of the display area 110. The display area 110 corresponds to the visible area 210 of the touch sensing layer 200, and the non-display frame area 120 touches The routing area 220 of the control sensing layer 200 corresponds to. The non-display bezel area 120 has a preset color. A color-blocking ink 300 is applied to the routing area 220 of the touch sensing layer 200, and the color of the blocking ink 300 is the same as the color of the non-display bezel area 120.

S2: The panel 100 is bonded to the touch sensing layer 200.

In this embodiment, as shown in FIG. 2 and FIG. 4, the specific steps of the step S2 are: S21: depositing an adhesive layer 400 on the touch sensing layer 200; S22: using a bonding device to touch the touch The control sensing layer 200 is press-fitted onto the panel 100. The touch sensing layer 200 and the panel 100 are bonded by the adhesive layer 400, and the operation is simple and convenient, and the bonding is reliable. Optionally, the adhesive layer 400 is an OCA (Optically Llear Adhesive), and the adhesive effect is good.

Generally, a silver glue line is disposed in the wiring area 220 of the touch sensing layer 200. When there is a bonding error between the panel 100 and the touch sensing layer 200, the silver glue line may leak outside, which may affect the touch screen product. Exterior. The method for bonding the panel 100 and the touch sensing layer 200 is to cover the trace of the touch sensing layer 200 by applying a color blocking ink 300 in the routing area 220 of the touch sensing layer 200. The color of the occlusion ink 300 is the same as the color of the non-display frame area 120 of the panel 100, so that a non-transparent frame can be formed in the routing area 220 of the touch sensing layer 200, and the panel 100 and the touch sensing layer are formed. After the bonding is performed on the panel 100, even if there is a matching tolerance between the panel 100 and the touch sensing layer 200, the color of the portion of the wiring area 220 exposed by the fitting tolerance is the same as the color of the non-display frame area 120 of the panel 100. The exposed portion of the area 220 and the non-display frame area 120 are integrated as a whole. The appearance of the area 220 is not exposed, and the leakage area of the touch area 220 of the touch sensing layer 200 can be effectively avoided. Improve the appearance of products. In addition, due to the application of the shielding ink 300, the preset tolerance gap between the line in the wiring area 220 and the frame of the visible area 210 can be reduced, thereby reducing the frame of the visible area 210 and the touch sensing layer 200. The distance between the edges and the screen ratio are higher, and the non-display border area 120 of the panel 100 can also be made smaller and the visual effect is better. The method for bonding the panel 100 and the touch sensing layer 200 of the present embodiment is particularly suitable for the touch screen product of the narrow frame, which can effectively avoid the leakage of the wiring area 220 of the touch sensing layer 200 and improve the appearance of the product. It is easy to operate without improving the precision or fit environment of the bonding equipment.

Specifically, the coloring occlusion ink 300 is applied to the routing area 220 of the touch sensing layer 200, and the occlusion ink 300 may be coated to cover the entire wiring area 220 of the touch sensing layer 200. The area, and then the entire area of the wiring area 220 is completely covered, so that the shielding ink 300 covers the wiring area 220 of the touch sensing layer 200, and the process is convenient. Alternatively, the masking ink 300 may be applied to the side of the viewing area 220 of the touch sensing layer 200 near the visible area 210 of the touch sensing layer 200, and the blocking ink 300 may be covered. The routing area 220 of the sensing layer 200 is controlled, and the leakage condition of the routing area 220 of the touch sensing layer 200 due to the fitting tolerance of the routing area 220 can also be improved, thereby saving ink.

Optionally, the preset color of the non-display bezel area 120 is black, and the color of the occlusion ink 300 corresponds to black. Generally, the common color of the non-display bezel area 120 of the panel 100 is black. By using the preset color in black, the blocking ink 300 is corresponding to black, which conforms to most practical use scenarios, and has a wide application range.

In this embodiment, in the step S1, the specific steps of applying the color-blocking ink 300 in the routing area 220 of the touch sensing layer 200 are as follows:

S11: printing a color-blocking ink 300 in the routing area 220 of the touch sensing layer 200 by using a printing machine;

S12: The printed masking ink 300 is cured by an IR thermal oven.

The method for bonding the panel 100 and the touch sensing layer 200 in the embodiment first prints the blocking ink 300 in the routing area 220 of the touch sensing layer 200 through the printing machine, and then uses the infrared heat oven to print the printed ink. The occlusion ink 300 is cured, that is, the occlusion ink 300 can be coated on the routing area 220 of the touch sensing layer 200, and the operation is convenient, and the coating of the blocking ink 300 is stabilized; and the panel 100 and the touch sensing can be solved by improving the process. The tolerance problem caused by the bonding of the layer 200 causes the appearance of the outer wiring area 220 of the touch sensing layer 200 to be exposed, resulting in poor appearance of the product.

Further, the printing machine has a doctor blade pressure of 30 Kgf ± 10 Kgf and the printing machine has a blade speed of 150 mm/s ± 50 mm/s. By setting the doctor blade pressure and the blade speed to the above range, the masking ink 300 obtained by the printing machine is stable, the printing quality is good, the printing ink is smooth and smooth, no penetration, no defect, and the overall thickness is uniform. The curing parameters of the IR thermal oven for curing the printed masking ink 300 are: heat curing at a temperature of 140 ° C ± 5 ° C for 60 s ± 20 s. By adopting the above curing parameters, the curing effect on the blocking ink 300 is good, and the blocking ink 300 is stabilized.

In this embodiment, as shown in FIG. 3 and FIG. 5, before the step S1, the method further includes the step S0: printing the insulating ink 500 in the routing area 220 of the touch sensing layer 200. The occlusion ink 300 is overlaid on the insulating ink 500. The insulating ink 500 can cover the lines in the routing area 220 by printing the insulating ink 500 in the wiring area 220 before applying the colored blocking ink 300 to the wiring area 220 of the touch sensing layer 200. The lines within the routing area 220 are protected from subsequent operations that affect or damage the lines within the routing area 220. Optionally, the insulating ink 500 is a transparent shielding ink 300.

Further, between step S1 and step S2, step S1a is further included: a protective film is attached to the touch sensing layer 200. Furthermore, before the panel 100 is bonded to the touch sensing layer 200, the protective film can provide a rotation protection function to the touch sensing layer 200.

As shown in FIG. 2, FIG. 3 and FIG. 4, a touch screen includes a touch sensing layer 200 and a panel 100. The touch sensing layer 200 includes a visible area 210 and a routing area 220 located at a periphery of the visible area 210. The panel 100 includes a display area 110 and a non-display bezel area 120 located at the periphery of the display area 110. The display area 110 corresponds to the visible area 210 of the touch sensing layer 200, and the non-display border area 120 corresponds to the routing area 220 of the touch sensing layer 200. The non-display bezel area 120 has a preset color. The wiring area 220 is coated with a color blocking ink 300, and the color of the blocking ink 300 is the same as the color of the non-display bezel area 120.

The touch screen of the touch sensing layer 200 is coated with a color blocking ink 300. The blocking ink 300 can cover the routing area 220 of the touch sensing layer 200 and block the color of the ink 300. The color of the non-display bezel area 120 of the panel 100 is the same. After the panel 100 is attached to the touch sensing layer 200, even if there is a matching tolerance between the panel 100 and the touch sensing layer 200, the routing area 220 is attached due to the tolerance. The exposed partial color is the same as the color of the non-display bezel area 120 of the panel 100. The exposed portion of the routing area 220 due to the fitting tolerance looks like a whole with the non-display bezel area 120, and it does not appear that the routing area 220 is exposed. In this case, the leakage condition of the routing area 220 of the touch sensing layer 200 can be effectively avoided, and the appearance of the product is poor. The touch screen described in this embodiment can be designed as a full-screen product with a narrow bezel.

In this embodiment, the panel 100 is a transparent glass substrate, plexiglass or plastic, which has good protection effect and low material cost. In this embodiment, the touch sensing layer 200 includes a conductive layer RX230 and a conductive layer TX240 which are sequentially stacked. The panel 100, the adhesive layer 400, the conductive layer RX230, and the conductive layer TX240 are sequentially stacked.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A method for bonding a panel and a touch sensing layer, comprising the steps of:

S1: The panel includes a display area and a non-display border area located at a periphery of the display area, where the display area corresponds to a visible area of the touch sensing layer, and the non-display border area corresponds to a trace area of the touch sensing layer. The non-display bezel area has a preset color, and a color-blocking ink is applied to the routing area of the touch sensing layer, and the color of the blocking ink is the same as the color of the non-display bezel area;

S2: bonding the panel to the touch sensing layer.
The method for bonding a panel and a touch sensing layer according to claim 1 , wherein in the step S1, the specific step of applying a color blocking ink to the wiring area of the touch sensing layer is :

S11: printing a color-blocking ink on the trace area of the touch sensing layer by using a printing machine;

S12: The printed occlusion ink is cured by an IR hot oven.
The method of bonding a panel and a touch sensing layer according to claim 2, wherein the printing machine has a blade pressure of 30 Kgf ± 10 Kgf and the printing machine has a blade speed of 150 mm/s ± 50 mm/s.
The method for bonding a panel and a touch sensing layer according to claim 2, wherein the curing parameter of the IR thermal oven for curing the masked ink after printing is: heating at a temperature of 140 ° C ± 5 ° C Curing for 60s ± 20s.
The method of bonding a panel and a touch sensing layer according to claim 1 , wherein the masking ink coating covers an entire area of the wiring area of the touch sensing layer; or the blocking ink The wiring area coated on the touch sensing layer is adjacent to a side of the visible area of the touch sensing layer.
The method for bonding a panel and a touch sensing layer according to claim 1, wherein before the step S1, the method further comprises the steps of:

S0: Printing insulating ink in the wiring area of the touch sensing layer.
The method for bonding a panel and a touch sensing layer according to any one of claims 1-6, further comprising the steps of: between step S1 and step S2:

S1a: a protective film is attached to the touch sensing layer.
The method for bonding a panel and a touch sensing layer according to any one of claims 1 to 6, characterized in that Therefore, the specific steps of the step S2 are:

S21: depositing an adhesive layer on the touch sensing layer;

S22: Pressing the touch sensing layer on the panel by using a bonding device.
A touch screen includes a touch sensing layer and a panel, the touch sensing layer includes a visible area and a routing area located at a periphery of the visible area, the panel includes a display area and a location a non-display bezel area on the periphery of the display area, the display area corresponding to the visible area of the touch sensing layer, the non-display bezel area corresponding to the routing area of the touch sensing layer, the non-display The frame area has a preset color, and the line area is coated with a color-blocking ink, and the color of the masking ink is the same as the color of the non-display frame area.
The method of bonding a panel and a touch sensing layer according to claim 9, wherein the panel is a transparent glass substrate, plexiglass or plastic.