CN108363510B

CN108363510B - Touch display screen, preparation method thereof and electronic product

Info

Publication number: CN108363510B
Application number: CN201810083057.0A
Authority: CN
Inventors: 虞精兵; 黄彦衡; 姚彦章; 任陈铭
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2018-01-29
Filing date: 2018-01-29
Publication date: 2021-05-18
Anticipated expiration: 2038-01-29
Also published as: CN108363510A

Abstract

The invention relates to a touch display screen, a preparation method thereof and an electronic product. The touch display screen comprises a display module and a touch module. The display module is provided with a first surface, a second surface and a side surface, wherein the first surface and the second surface are oppositely arranged, and the side surface is connected with the first surface and the second surface. The touch module comprises a touch body and a touch line electrically connected with the touch body, the touch body comprises a main body part and a bending part, the main body part is arranged on the first surface, at least part of structure of the bending part is arranged on the side surface of the display module, the touch line is located in the non-visible area, part of the touch line is arranged on the main body part, and part of the touch line is arranged on the bending part. The touch display screen provided by the invention can have a larger visible area under the condition of ensuring the same overall appearance size. The line width and the line distance of the touch control circuit do not need to be reduced, and the electric signals can be stably conducted, so that the stable conduction of the electric signals is ensured while the visual area is enlarged, and the good touch control sensitivity of the touch control display screen is further ensured.

Description

Touch display screen, preparation method thereof and electronic product

Technical Field

The invention relates to the technical field of touch control, in particular to a touch control display screen, a preparation method thereof and an electronic product.

Background

The touch display screen of electronic products such as mobile phones and flat panels generally comprises a touch module and a display module which are arranged in a stacked manner, wherein the touch module comprises a touch electrode and a touch lead, the touch lead is used for electrically connecting the touch electrode with a mainboard of the electronic product, an ink layer covering the touch lead is silk-printed on a protective cover plate of the electronic product, and the touch display screen is divided into a visible area and a non-visible area. In order to increase the area of the visible area, it is common practice to reduce the line width of the touch lead, but the reduction of the width of the touch lead is not favorable for the conduction of the electrical signal, thereby affecting the touch sensitivity of the electronic product.

Disclosure of Invention

Therefore, it is necessary to provide a touch display screen with high electrical signal conduction stability, a manufacturing method thereof and an electronic product, aiming at the problem that the traditional display screen has poor electrical signal conduction stability.

A touch display screen comprises a visible area and a non-visible area arranged around the visible area, and comprises:

the display module is provided with a first surface, a second surface and a side surface, wherein the first surface and the second surface are oppositely arranged, and the side surface is connected with the first surface and the second surface; and

the touch module comprises a touch body and a touch line electrically connected with the touch body, the touch body comprises a main body part and a bending part which are integrally formed, the main body part is arranged on the first surface, at least part of the structure of the bending part is arranged on the side surface of the display module, the touch line is positioned in the non-visible area, part of the touch line is arranged on the main body part, and part of the touch line is arranged on the bending part.

According to the touch display screen, the bending part is arranged in the touch module, and part of the touch circuit is arranged on the bending part, so that the touch circuit located in the non-visual area is partially bent to the side face of the display module along with the bending part, and the touch display screen can have a larger visual area under the condition that the whole appearance size is the same. The line width and the line distance of the touch control circuit do not need to be reduced, and the electric signals can be stably conducted, so that the stable conduction of the electric signals is ensured while the visual area is enlarged, and the good touch control sensitivity of the touch control display screen is further ensured.

In one embodiment, the touch module further includes a light shielding layer, the light shielding layer is located in the non-visible region and extends from the main body portion to the bending portion, and the light shielding layer covers a part of the touch circuit.

In one embodiment, the side surface includes a first side surface and a second side surface which are adjacent to each other, the bending portion includes a first bending portion and a second bending portion, the first bending portion is connected with the first side surface, and the second bending portion is connected with the second side surface;

the touch circuit comprises a touch lead and touch pins, one end of the touch lead is electrically connected with the main body part, the other end of the touch lead is electrically connected with the touch pins, the touch lead is distributed on the main body part and the first bending part, the touch pins are used for binding a flexible circuit board, the touch pins are distributed on the main body part and the second bending part, and the light shielding layer covers the touch lead and part of the touch pins.

In one embodiment, the display module includes an operation area and a frame area surrounding the operation area, the operation area has an interface connected to the frame area and parallel to the first side surface, the light shielding layer includes an inner end surface disposed on the main body, and the inner end surface is located between the interface and the first side surface.

In one embodiment, the distance between the inner end surface and the interface surface is greater than 0.15 mm.

In one embodiment, the first bent portion and the second bent portion extend onto the second surface, the light shielding layer includes a first outer end surface far away from the main body portion, and a distance between a projection of the first outer end surface on the second surface and the first side surface is less than or equal to 1 mm;

the light shielding layer comprises a second outer end surface far away from the main body part, and the distance between the projection of the second outer end surface on the second surface and the second side surface is smaller than or equal to 1 mm.

In one embodiment, the main body portion has two notches, and the two notches are respectively located at two sides of the second bending portion.

In one embodiment, the light shielding layer includes a first outer surface parallel to the first side surface and disposed away from the touch lines, and a distance between the first outer surface and the first side surface is 45-200 um;

the light shield layer is including being on a parallel with the second side just keeps away from the second surface that the touch-control circuit set up, the second surface with distance between the second side is 45-200 um.

In one embodiment, the bending portion extends to the second surface, and an end of the bending portion disposed on the second surface exceeds the light shielding layer.

A preparation method of any one of the touch display screens comprises the following steps:

providing a display module and a touch module;

arranging one surface of the touch control body, which is far away from the touch control circuit, on the first surface; and

and bending the part of the touch control body, which is provided with the touch control circuit, to obtain a bent part, so that at least part of the structure of the bent part is arranged on the side surface of the display module.

According to the preparation method of the touch display screen, the line width and the line distance of the touch lines in the touch module do not need to be changed, the yellow light process does not need to be improved, and the area of the visible area of the touch display screen can be increased under the condition that the overall appearance size of the touch display screen is not changed only through the bending step, so that the preparation method is simple and convenient.

In one embodiment, before the step of disposing the surface of the touch body away from the touch line on the first surface, the method further includes:

and printing a shading layer on the surface of the part of the touch body, which is provided with the touch circuit, so that the shading layer covers part of the touch circuit.

An electronic product, comprising:

any of the above touch display screens; and

the protection cover plate is arranged on one surface, far away from the display module, of the main body portion, the protection cover plate is close to one surface of the main body portion and is provided with an ink layer, and therefore the touch display screen is divided into the visible area and the non-visible area.

The touch display screen is applied to the electronic product, the area of a visible area of the electronic product can be effectively increased under the condition that the overall appearance size of the electronic product is not changed, the line width and the line distance of a touch circuit of the touch display screen are not required to be reduced, the conduction of an electric signal is ensured, and therefore the electronic product can have good touch sensitivity.

Drawings

FIG. 1 is a cross-sectional view of an electronic product according to an embodiment;

FIG. 2 is a partial cross-sectional view of a touch display screen of the electronic product shown in FIG. 1;

fig. 3 is a top view of the electronic product shown in fig. 1 when the touch module is folded;

fig. 4 is a flowchart of a method for manufacturing a touch display screen in the electronic product shown in fig. 1;

fig. 5 is a cross-sectional view of the touch module corresponding to step S530 in the method for manufacturing the touch display screen shown in fig. 4;

fig. 6 is a cross-sectional view of the semi-finished touch display screen corresponding to step S540 in the manufacturing method of the touch display screen shown in fig. 4;

fig. 7 is a cross-sectional view of the finished touch display screen corresponding to step S550 in the manufacturing method of the touch display screen shown in fig. 4.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention can be embodied in many different forms than those herein described and many modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "in communication" or "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Unless defined otherwise, 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.

The touch display screen of one embodiment can be applied to various electronic products, such as a mobile phone, a camera, a tablet computer, and the like. Referring to fig. 1 to 3, an electronic product 10 includes a protective cover 20, an ink layer 30, a transparent insulating adhesive layer 40, and a touch display screen 50.

In the present embodiment, the material of the protective cover 20 is glass and has a bonding surface. In other embodiments, the material of the protective cover 20 may also be transparent plastic, acrylic, or any other material with a certain light transmittance that can protect the structure to which it is attached.

The ink layer 30 is formed on the attaching surface by screen printing or transfer printing. The transmittance of the ink layer 30 is low, and the touch display screen 50 is divided into a visible area 60 and a non-visible area 70.

Transparent insulating glue layer 40 is located the laminating surface and is extended to on printing ink layer 30, and transparent insulating glue layer 40 is optical cement, and bonding strength is high for bond protection cover plate 20 and touch-control display screen 50. Moreover, the transparent insulating adhesive layer 40 is colorless and transparent, and the light transmittance is higher than 90%, so that the display effect of the touch display screen 50 is not affected.

The touch display screen 50 includes a display module 100 and a touch module 200, and the display module 100 and the touch module 200 are connected together by gluing.

The display module 100 has an operation area 102 and a frame area 104 surrounding the operation area 102, the area of the operation area 102 is equal to or slightly smaller than the area of the visible area 60, the operation area 102 is mainly used for displaying characters, images and the like, the frame area 104 fixes the operation area 102, and the frame area 104 can be provided with a driving circuit and other structures used for being associated with the operation area 102. The display module 100 has a first surface 110 and a second surface 120 disposed opposite to each other, and a side surface connected between the first surface 110 and the second surface 120, the side surface including a first side surface 130 and a second side surface 140 adjacent to each other.

The touch module 200 includes a touch body 210 and a touch line 220 electrically connected to the touch body 210. The touch body 210 includes a main body portion 212 and a bending portion 214 integrally formed. The main body 212 is located between the protective cover 20 and the first surface 110, the main body 212 is connected to the protective cover 20 through the transparent insulating glue layer 40, and the main body 212 is attached to the first surface 110 in a gluing manner. At least a portion of the bending portion 214 is disposed on a side surface of the display module 100. The touch circuit 220 is located in the non-visible area 70, a portion of the touch circuit 220 is disposed on the main body portion 212, and a portion of the touch circuit 220 is disposed on the bending portion 214. Touch electrodes are formed on the main body portion 212, and the touch lines 220 are electrically connected to the touch electrodes on the main body portion 212.

By providing the bending portion 214 and disposing part of the touch circuit 220 on the bending portion 214, the touch circuit 220 located in the non-visible area 70 is also partially bent to the side of the display module 100 along with the bending portion 214, so that a larger area of the visible area 60 can be provided under the condition that the overall external dimension of the touch display screen 50 is not changed. And because the line width and the line distance of the touch control line 220 do not need to be reduced, the electric signal can be stably conducted, so that the area of the visible area 60 is increased, the stable conduction of the electric signal is ensured, and the good touch control sensitivity of the touch control display screen 50 is further ensured.

In the present embodiment, the touch module 200 further includes a light shielding layer 230, wherein the light shielding layer 230 is located in the non-visible region 70, extends from the main body portion 212 to the bending portion 214, and covers a portion of the touch circuit 220. The light shielding layer 230 may be black insulating ink or other insulating ink with a dark color and a strong covering power, and is coated on a portion of the touch circuit 220 by printing. By providing the light shielding layer 230, the touch circuit 220 can be protected, and the light shielding layer 230 with poor light transmittance extends to the bending portion 214, so that the light leakage of the display module 100 from the side surface can be effectively prevented. Of course, in other embodiments, the light-shielding layer 230 may be omitted.

Further, the bent portion 214 can also extend to the second surface 120, and an end of the bent portion 214 disposed on the second surface 120 exceeds the light shielding layer 230. Due to the light transmittance of the bending portion 214, when the touch body 210 is bent, the bending condition of the touch line 220 can be observed from the side of the bending portion 214 away from the light shielding layer 230, so as to prevent the touch line 220 from being broken due to excessive bending. Moreover, the touch body 210 can be prevented from wrapping the display module 100 too tightly to cause the display module 100 to bend and deform.

In other embodiments, the bending portion 214 may be bent only to the side of the display module 100 and does not extend any more; or the bent portion 214 extends to the second surface 120, and one end of the bent portion on the second surface 120 is flush with the end surface of the light shielding layer 230.

Specifically, in the present embodiment, the bent portion 214 includes a first bent portion 216 and a second bent portion 218, the first bent portion 216 is connected to the first side surface 130, and the second bent portion 218 is connected to the second side surface 140. The touch circuit 220 includes a touch lead 222 and a touch pin 224, wherein one end of the touch lead 222 is electrically connected to the touch electrode on the main body 212, and the other end is electrically connected to the touch pin 224. The touch leads 222 are distributed on the main body portion 212 and the first bending portion 216. The touch pins 224 are used for binding the flexible circuit board, the touch pins 224 are distributed on the main body portion 212 and the second bending portion 218, the light shielding layer 230 covers the touch lead 222 and a part of the touch pins 224, and the part of the touch pins 224 exposed out of the light shielding layer 230 is used for binding the flexible circuit board.

Referring to fig. 1 and fig. 3, the first bending portion 216 extends to the second surface 120. For the structure corresponding to the first bent portion 216, the operation region 102 has an interface 106 connected to the frame region 104 and parallel to the first side surface 130, and the light shielding layer 230 includes an inner end surface 231 disposed on the main body 212, and the inner end surface 231 is located between the interface 106 and the first side surface 130. Therefore, the light shielding layer 230 can be prevented from covering the image displayed by the display module 100. In the present embodiment, the distance between the inner end surface 231 and the interface surface 106 is set to be greater than 0.15mm in consideration of possible tolerance at the time of mounting.

The light shielding layer 230 further includes a first outer end surface 232 opposite the inner end surface 231, away from the main body portion 212. The distance between the projection of the first outer end surface 232 on the second surface 120 and the first side surface 130 is less than or equal to 1 mm. The first outer end surface 232 of the light shielding layer 230 is aligned with the first side surface 130 of the display module 100. Specifically, in the manufacturing process, before the light shielding layer 230 is printed, the size of the light shielding layer 230 is preset with reference to the position of the first side surface 130 of the display module 100, and the position of the first outer end surface 232 is determined, so that the first outer end surface 232 and the first side surface 130 in a finished product can be aligned and positioned accurately, and therefore the touch lead 222 covered by the light shielding layer 230 is prevented from being stretched excessively, or the bent touch lead 222 is prevented from being too large in size and cannot be completely attached to the display module 100. When the projection of the first outer end surface 232 on the second surface 120 coincides with the first side surface 130, the first outer end surface 232 of the light shielding layer 230 is ideally aligned with the first side surface 130 of the display module 100. The projection of the first outer end surface 232 on the second surface 120 may be within ± 1mm of the first side surface 130, taking into account possible tolerances in actual manufacturing.

The light-shielding layer 230 further includes a first outer surface 234 parallel to the first side surface 130 and disposed away from the touch line 220. Based on material properties and current industrial processing accuracy and level, the distance D between the first outer surface 234 and the first side 130₁Defined as 45-200 um.

In this embodiment, two first bending portions 216 are provided and are oppositely disposed on two sides of the display module 100, but in other embodiments, only one first bending portion 216 may be provided, that is, only one side of the left and right sides of the touch module 200 is bent.

Referring to fig. 2 and 3, the second bending portion 218 extends to the second surface 120. For the structure corresponding to the second bent portion 218, the light shielding layer 230 includes a second outer end surface 236 away from the main body portion 212, and a distance between a projection of the second outer end surface 236 on the second surface 120 and the second side surface 140 is less than or equal to 1 mm. By aligning and positioning the second outer end surface 236 of the light shielding layer 230 with the second side surface 140 of the display module 100, specifically, in the manufacturing process, before printing the light shielding layer 230, the size of the light shielding layer 230 is preset by referring to the position of the second side surface 140 of the display module 100, and the position of the second outer end surface 236 is determined, so that the second outer end surface 236 and the second side surface 140 in a finished product can be aligned and positioned more accurately, and the touch pins 224 covered by the light shielding layer 230 are prevented from being stretched excessively, or the bent touch pins 224 are prevented from being too large in size and cannot be completely attached to the display module 100. When the projection of the second outer end surface 236 on the second surface 120 coincides with the second side surface 140, the second outer end surface 236 of the light shielding layer 230 is ideally aligned with the second side surface 140 of the display module 100. The distance between the projection of the second outer end surface 236 on the second surface 120 and the second side surface 140 may be set to be within ± 1mm in consideration of the tolerance possible in actual manufacturing.

The light-shielding layer 230 further includes a second outer surface 238 disposed parallel to the second side surface 140 and away from the touch lines 220. Distance D between second outer surface 238 and second side 140 based on material properties and current industrial processing accuracy and level₂Defined as 45-200 um.

The main body portion 212 has two notches 211, and the two notches 211 are respectively located at two sides of the second bending portion 218. The second bending portion 218 is stressed due to the bending form, and the connection portion between the main body portion 212 and the second bending portion 218 can be reinforced by the notch 211, so that the connection portion between the second bending portion 218 and the main body portion 212 can be prevented from being easily torn. In the present embodiment, both the notches 211 are U-shaped notches. In other embodiments, rectangular, semicircular notches, or the like may also be used.

As shown in fig. 4, in the present embodiment, a method for manufacturing a touch display screen 50 is further provided, which specifically includes the following steps:

step S510: a display module 100 and a touch module 200 are provided.

The structure of the display module 100 is shown in fig. 1. The touch module 200 includes a touch body 210 and a touch line 220 electrically connected to the touch body 210, wherein the touch line 220 is formed on the touch body 210 by a yellow light process.

Step S520: two notches 211 are respectively formed on two sides of the touch pin 224 on the main body 212.

Step S530: the light-shielding layer 230 is disposed on the touch body 210, such that the light-shielding layer 230 covers a portion of the touch line 220. After this step is completed, the structure shown in fig. 5 is obtained.

The light shielding layer 230 is an insulating ink with low light transmittance, and is formed mainly by printing, the light shielding layer 230 completely covers the touch lead 222 and covers part of the touch pins 224, and the exposed part of the touch pins 224 is used for binding the flexible circuit board. Of course, when the light-shielding layer 230 is omitted, the step S530 may be omitted. In addition, step S530 may also be interchanged with step S520.

Step S540: the surface of the touch body 210 away from the touch line 220 is disposed on the first surface 110. Specifically, the touch module 200 and the display module 100 may be connected together by gluing, so as to obtain a semi-finished structure of the touch display screen 50 shown in fig. 6.

Step S550: the portion of the touch body 210 on which the touch line 220 is disposed is bent to obtain the bent portion 214, so that at least a part of the bent portion 214 is disposed on the side surface of the display module 100.

Specifically, during bending, the left side of the touch module 200 may be bent to obtain a first bent portion 216, the right side of the touch module 200 is bent to obtain another first bent portion 216, and finally, one end of the touch module 200 for binding the flexible circuit board is bent to obtain a second bent portion 218.

The touch display screen 50 shown in fig. 7 obtained by the preparation method can be applied to various electronic products. As shown in fig. 1, the touch display screen 50 and the protective cover plate 20 printed with the ink layer 30 can be attached to each other through the transparent insulating adhesive layer 40, so that the area of the visible area is effectively increased without changing the overall external dimension of the electronic product, the line width and the line distance of the touch circuit of the touch display screen are not required to be reduced, the conduction of the electrical signal is ensured, and the electronic product can have good touch sensitivity.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A touch display screen comprises a visible area and a non-visible area arranged around the visible area, and is characterized by comprising:

the display module is provided with a first surface, a second surface and a side surface, wherein the first surface and the second surface are oppositely arranged, and the side surface is connected with the first surface and the second surface;

the touch module comprises a touch body and a touch line electrically connected with the touch body, the touch body comprises a main body part and a bent part which are integrally formed, the main body part is arranged on the first surface, at least part of the bent part is arranged on the side surface of the display module, the touch line is positioned in the non-visible area, part of the touch line is arranged on the main body part, and part of the touch line is arranged on the bent part; and

the light shielding layer is located on one side, deviating from the display module, of the touch control body, the light shielding layer covers all or part of the touch control circuit, the bending portion extends to the second surface, the bending portion is located one end of the second surface exceeds the light shielding layer, or the bending portion is located one end of the second surface and is flush with the end face of the light shielding layer.

2. The touch display screen of claim 1, wherein the light shielding layer is located in the non-visible area and extends from the main body portion to the bending portion.

3. The touch display screen of claim 2, wherein the side surface comprises a first side surface and a second side surface which are adjacent to each other, the bending portion comprises a first bending portion and a second bending portion, the first bending portion is connected with the first side surface, and the second bending portion is connected with the second side surface;

4. The touch display screen of claim 3, wherein the display module comprises an operation area and a frame area surrounding the operation area, the operation area has an interface connected to the frame area and parallel to the first side surface, the light shielding layer comprises an inner end surface disposed on the main body, and the inner end surface is located between the interface and the first side surface.

5. The touch display screen of claim 4, wherein the distance between the inner end surface and the interface surface is greater than 0.15 mm.

6. The touch display screen of claim 3, wherein the first bending portion and the second bending portion both extend onto the second surface, the light shielding layer includes a first outer end surface away from the main body portion, and a distance between a projection of the first outer end surface on the second surface and the first side surface is less than or equal to 1 mm;

7. The touch display screen of claim 6, wherein a projection of the first outer end surface on the second surface coincides with the first side surface;

the projection of the second outer end surface on the second surface coincides with the second side surface.

8. The touch display screen of claim 3, wherein the main body portion has two notches, and the two notches are respectively located at two sides of the second bending portion.

9. The touch display screen of claim 3, wherein the light-shielding layer comprises a first outer surface parallel to the first side surface and disposed away from the touch lines, and a distance between the first outer surface and the first side surface is 45-200 um;

10. A method for manufacturing a touch display screen according to any one of claims 1 to 9, comprising the steps of:

providing a display module and a touch module;

11. The method for manufacturing a touch display screen according to claim 10, wherein before the step of disposing the surface of the touch body away from the touch lines on the first surface, the method further comprises:

a light shielding layer is arranged on the touch control body, so that the light shielding layer covers part of the touch control circuit.

12. An electronic product, comprising:

the touch display screen of any one of claims 1-9; and