TWM590723U - Touchscreen having optical clear adhesive layer with high plasticity - Google Patents

Abstract

This creation relates to a touch screen, which is assembled through a lamination process, and includes: a liquid crystal display module, which is included in the corner where the frame and the display surface meet; a touch panel, which is arranged above the display surface, and Receive touch input; high plasticity solid optical adhesive, which has been cured before the start of the bonding process; and high plasticity cured optical adhesive, which has not been cured before the bonding process, and is filled on the The corner and the vicinity of the corner, together with the high plasticity solid optical glue, are arranged between the touch panel and the liquid crystal display module to bond the touch panel and the liquid crystal display module.

Description

Touch screen with high plastic optical adhesive layer

This creation is about a touch screen, especially a touch screen that includes a composite high plasticity light-transmissive bonding layer.

A touchscreen refers to an inductive display that simultaneously receives touch signals input from a finger or a stylus while displaying images on the screen. An external touchscreen is used as an example. The basic structure is A touch panel is superimposed on the outside of the liquid crystal display module touched by the touch function. The liquid crystal display module is used to display the screen and the touch panel is responsible for sensing touch input. When a finger or stylus touches the screen with a gesture that meets the definition When it is an object, a specific button or a position, the control chip immediately executes the corresponding command according to the predefined and programmed method. The touch screen has been widely used in daily life and industrial fields due to its advantages of easy operation and intuitiveness.

The touch panel and the liquid crystal display module are generally assembled by bonding technology. The touch panel is pasted on the liquid crystal display module to form a touch screen. In the earliest time, edge lamination is often used for bonding. The panel and the LCD module are glued on only four borders. Although the frame bonding technology has many obvious advantages such as easy operation, low cost and low technical threshold, but only fitting the border causes the display bread of the screen to sandwich a layer of air gap (air gap), it causes problems such as loss of reflectance, contrast blur, light refraction and ghosting, etc., resulting in a decline in the overall visual quality of the screen; The flow lamination technology is full lamination, which fills a layer of solid optical adhesive layer in the irregular gap between the liquid crystal display module and the touch panel. The coverage of the optical adhesive layer includes The display surface at the center can also extend to the border area at the edge to ensure that there is no air gap within the display surface of the liquid crystal display module and the touch panel, also known as non-air-gap The technology can eliminate the optical problems of light refraction or ghosting, so that the finished touch screen displays better optical characteristics and image quality.

Figure 1 is a schematic diagram showing the structure of a conventional technology touch panel and a liquid crystal display module using full-plane bonding assembly; Figure 2 is a schematic diagram of a conventional technology touch panel and a liquid crystal display module using a full-plane bonding assembly Schematic cross-sectional view; for a conventional touch screen 10, the touch panel 12 is attached to the display direction of the liquid crystal display module 14, the sensing area SA of the touch panel 12 corresponds to the display surface DS of the liquid crystal display module 14, the touch panel 12 There is a gap GP between the LCD module 14 and the LCD. The gap GP is generally irregular and its range spans the display surface DS and the frame area FA. If frame bonding technology is used, the bonding range is limited to the frame area FA. A layer of air is sandwiched between the touch panel 12 and the liquid crystal display module 14; but in the full-plane bonding technology, a layer of solid optical glue 16 is filled in the touch panel 12 and the liquid crystal display module 14 In the gap GP of the clip, especially when it is completely filled in the gap GP covering the display surface DS, some full-plane bonding techniques will avoid the solid-state optical adhesive 16 across the border area FA, but in some full-plane bonding techniques The coverage of the solid-state optical adhesive 16 will be extended to a part of the border area FA, but no matter what kind of full-plane bonding technology, it can effectively eliminate most of the air layer in the range of the display surface DS.

However, there are still many shortcomings in this full-plane bonding, because the process is implemented in a non-vacuum environment, and an additional pressure defoaming step is added to avoid the residual of bubbles, which causes the processing time to increase, but even if the defoaming step is added, Limited by the fluidity of the solid optical glue 16 itself, Due to factors such as process temperature and pressure conditions, it is often difficult for solid optical adhesive 16 to fill corners, corners, or edges at right angles. As shown in Figure 2, it is inevitable that small gaps will remain in the corners after bonding 18. Bubbles or air chambers, etc. If these gaps 18 are scattered in the range of the display surface DS, it will cause light leakage in the final touch screen 10 product, or defects such as bright spots, light spots or halos on the screen; and solid optical glue 16 is still inevitably doped with trace gas inside. After the touch screen 10 is used for a period of time, under the influence of environmental factors such as cold shrinkage, thermal expansion, pressure changes, etc., the solid optical adhesive 16 within the range of the display surface DS is ultimately still There will be bubbles, light leakage and other defects, and various factors will directly or indirectly cause the poor quality of the touch screen 10.

Therefore, the creator of this case filed the Taiwan Invention Patent No. 108120514 for the invention titled "Touch Screen with Gel Optical Glue and its Manufacturing Method" on June 13, 108, which was aimed at all kinds of all-plane lamination technology. Disadvantages, a gel jelly that has been pre-cured and is in a jelly state is used as an optical adhesive layer. The jelly gel itself is easily deformed and has high plasticity to fill the gap between the touch panel and the liquid crystal display module Regular voids, the overall process does not need to implement the defoaming step, nor the curing step, and the finished product is not prone to bubbles, which can effectively save processing time and cost.

However, the above-mentioned jelly gel still has the possibility of various configurations and multi-applications on the touch screen, and there is room for further improvement. Therefore, after careful testing and research, the applicant finally devised this case with a persevering spirit. "Touch screen with high plastic optical adhesive bonding layer" can overcome the above shortcomings. The following is a brief description of the creation.

In this creation, two kinds of optical adhesives with the same main components but different physical properties are mixed to serve as an adhesive layer between the touch panel and the liquid crystal display module. The glue is a high-plasticity solid glue that has been pre-cured before the start of the laminating process, and the other optical glue is a high-plasticity solidified glue that has not been pre-cured before the start of the laminating process.

This creation uses a high-plasticity curing adhesive that has not been pre-cured. Compared with a high-plasticity solid adhesive that has been pre-cured before the bonding process, it has better fluidity and lower viscosity but is still sufficient to maintain a certain degree. The characteristics of the shape, the high plastic curing adhesive is dedicated to be filled on the LCD module, the most difficult to deal with corners in the manufacturing process, the high plastic curing adhesive can easily fill the corners with a step at right angles, and further Fill in the many micro gaps in the corner.

Finally, the high plastic solid adhesive is used as the main adhesive layer to fill the remaining space that needs to be filled with adhesive, and the touch panel and the liquid crystal display module are bonded, which can not only avoid the residues that may remain at the corners of the finished product after the bonding process is completed Tiny voids, bubbles, or air chambers can eliminate optical defects such as light leakage, bright spots, or halos that occur in the finished product. It can also increase the physical air tightness and moisture resistance of the finished product, and increase the overall adhesion area. Improve adhesive strength and enhance the structural strength of the finished product

This creation not only retains the many advantages of the high plastic solid gel, that is, the jelly gel itself, but also further uses the high plastic solid gel or silicone polymer as a base, and further adds additional colloids to fine-tune the high plastic curable glue. It is specially used to fill in the corner parts, which improves the quality of the corner parts that are more difficult to handle in the lamination process. The finished touch screen is not prone to bubbles, and because the two optical adhesives have roughly the same main components Therefore, when the finished touch screen is heated for the second time, the junction between the two optical adhesives will disappear, and the two optical adhesives will be merged into a single optical adhesive layer.

According to this creation, a touch screen is proposed, which is assembled through a laminating process, It also includes: a liquid crystal display module, which is included in the corner where the frame meets the display surface; a touch panel, which is arranged above the display surface and receives touch input; a high plastic solid-state optical glue, which is used in the laminating process It has been pre-cured before the start; and high plasticity cured optical adhesive, which has not been cured before the bonding process starts, and is paved around the corner and near the corner, and is set together with the high plasticity solid optical adhesive The touch panel and the liquid crystal display module are bonded between the touch panel and the liquid crystal display module.

Preferably, the touch screen further includes: the liquid crystal display module, which displays a screen within the range of the display surface, the frame surrounds the display surface, the frame is higher than the display surface and between the display surfaces Forming a step; and the touch panel, which includes a sensing area, which corresponds in position to the display surface.

Preferably, during the process of the bonding process, the high plasticity cured optical adhesive system is filled on the step, the corner, and the step and the vicinity of the corner.

Preferably, during the process of the bonding process, the high-plasticity cured optical glue, the frame, and the display surface together form a shallow groove space for filling the high-plasticity solid optical glue.

Preferably, the high plasticity-curable optical adhesive system is based on an organosilicon polymer and contains additional components selected from normal temperature curing adhesive, ultraviolet curing adhesive, thermal curing adhesive or composite adhesive.

Preferably, after the bonding of the high plasticity solid optical adhesive and the high plasticity curing optical adhesive is completed, it is heated at a temperature between 50°C and 65°C for 15 to 30 minutes, and then cooled The adhesion strength between 3.0N and 10N (Newton/20mm) is finally achieved, and the light transmission rate is greater than 91%.

Preferably, the high plasticity solid optical adhesive and the high plasticity curing optical adhesive jointly form an optical adhesive layer after the bonding process is completed.

DS‧‧‧Display

FA‧‧‧Border

SA‧‧‧sensing area

GP‧‧‧Gap

10‧‧‧Conventional touch screen

12‧‧‧Touch panel

14‧‧‧LCD display module

16‧‧‧Solid optical glue

18‧‧‧Gap

100‧‧‧Touch screen

110‧‧‧LCD display module

111‧‧‧Border

112‧‧‧Monitor

121‧‧‧High plasticity solid optical adhesive

122‧‧‧High plasticity curing optical adhesive

123‧‧‧Optical adhesive layer

130‧‧‧Touch panel

SP‧‧‧shallow space

h‧‧‧step difference

C‧‧‧corner

NS‧‧‧Interface

Figure 1 is a schematic diagram showing the structure of a conventional technology touch panel and a liquid crystal display module using full-plane bonding assembly; Figure 2 is a schematic diagram of a conventional technology touch panel and a liquid crystal display module using a full-plane bonding assembly Figure 3 is a schematic sectional view showing the structure of the liquid crystal display module used in this creation; and Figures 4 to 7 are the steps in the creation process of the high plastic optical adhesive used in the touch screen bonding process Schematic diagram of the structure.

This creation will be fully understood by the following examples, so that those who are familiar with this skill can complete it, but the implementation of this creation is not limited by the following implementation cases and its implementation type; It does not include restrictions on the size, size and scale. The actual implementation of this creation is not limited by the drawings of this creation.

The term "preferred" in this article is non-exclusive and should be understood as "preferred but not limited to". Any steps described or recorded in any specification or request can be performed in any order, not limited to the description in the request Order, the scope of this creation should be determined only by the appended request items and their equivalents, and should not be determined by the examples of implementation examples; when the term "comprising" and its variations appear in the description and the request items, An open language, not restrictive Meaning, does not exclude other features or steps.

This creative department uses two kinds of optical adhesives with the same main components but different physical properties as the adhesive layer of the optical adhesive, and the lamination of the touch screen. The first optical adhesive is a high plastic solid optical adhesive (high plastic solid adhesive) ), or gel-based optical glue, which is mainly composed of silicone and has been cured in advance before the bonding process. Its production method is to the original liquid optical glue Pre-curing treatment to make it colorless, transparent or light-transmittable, with high plasticity and elasticity, and low fluidity With a high viscosity (viscosity), it does not cause any flow and is sufficient to maintain a fixed shape, with a jelly-like (jelly-like) solid appearance gel (gel).

The first solid plastic with high plasticity that is cured and in a gel state does not flow arbitrarily and cannot be shaped like the optical adhesive in the liquid state, which may increase the difficulty and complexity of the implementation of the overall process. Solid optical adhesive obtains the penetration degree of grade 5 (5#) under the test method of JIS K 2207. After being applied to the surface to be bonded and the adhesion is completed, it takes about 15 minutes to 30 minutes, at a temperature between 50 degrees Celsius After heating at a temperature between 65 degrees Celsius and 65 degrees Celsius, the predetermined adhesive strength can be quickly reached. After the adhesion is completed, according to different adhesive materials, each 20mm length of high plastic solid optical adhesive layer can produce between 3.0N ~ 10N (Newton / 20mm) adhesion strength.

In the optical properties part, the highly plastic solid optical glue after the adhesion has a high light transmittance of greater than 91% and a low light reflectance (refractive index) of less than 1.41 in the visible light wavelength range. nature portion, after the completion of high plasticity adhesive solid optical adhesive having good dielectric properties, having at least 8 × 10 ¹⁵ (Ω.cm) is a volume resistivity of at least 3 × 10 ¹⁵ (Ω.cm) surface resistivity, and interposed The dielectric constant between 2.79~2.81 can provide a good dielectric layer; the high plasticity solid optical adhesive proposed in this creation has the following physical properties after measurement:

The second type of optical adhesive is high plasticity curing optical adhesive (high plasticity curing adhesive), which is based on the first type of high plasticity solid optical adhesive or silicone polymer, and further added room temperature curing adhesive and ultraviolet (UV) curing adhesive , Thermosetting adhesive or compound adhesive, but it is not pre-cured before the bonding process is started, and it is not cured until it is bonded to the LCD module. Its appearance is also colorless, transparent or transparent, and also with It has high plasticity and elasticity, but it has higher fluidity and lower viscosity than the first high plasticity solid optical adhesive. Although it is relatively easy to flow, it is still sufficient to maintain a certain shape. Its physical properties and optical properties are roughly the same as The first type of high plasticity solid optical adhesive is similar and falls within the range listed in the table above.

Figure 3 is a schematic sectional view showing the structure of the liquid crystal display module used in this creation As shown in FIG. 3, a set of liquid crystal display module 110 is first provided. The liquid crystal display module 110 is preferably composed of a metal frame 111 covering the display 112, and includes a rectangular display surface DS, the frame 111 is located at the periphery of the upper side of the liquid crystal display module 110. There is a relatively high level difference h between the frame 111 and the display 112 or the display surface DS, and a corner C formed by the level difference h is a difficult part of the bonding process. Part of the reason, as described in Section B of the prior art, is limited by the low fluidity of the optical glue itself, process temperature and pressure conditions, which makes it difficult for the optical glue to completely fill the corner, the corner C, or the corner C with a step h, or Positions such as edges are also the places where micro-voids or bubbles or air chambers are most likely to remain locally after bonding.

Another part of the reason is that the liquid crystal display module 110 is composed of a frame 111 covering the display 112. Therefore, at the intersection of the frame 111 and the display 112, there may be small assembly gaps, screw holes, or structural gaps in the structure. Therefore, there will be relatively more irregularities or irregularly shaped seams or voids in the corner C. If the fluidity of the optical glue is insufficient, it is not easy to completely fill these irregularities or irregularly shaped seams or voids.

Therefore, the author proposes that it is better to use the second type of relatively high plasticity curable optical adhesive 122 with relatively fluidity to fill in the four corners C. Since the high plasticity curable optical adhesive 122 has not yet cured, it is better than the first type of high plasticity solid optical adhesive More fluid, it is easier to fill the corner C around at a right angle, and further fill in the micro gaps in the corner C, not only can avoid the corner C may leave tiny voids, air bubbles or air chambers, etc., but also eliminate the light leakage that may occur in the finished product , Optical defects such as explosion points, or halos, can also increase the physical air tightness and moisture resistance of the finished product, and increase the overall adhesion area to improve the adhesion strength and enhance the structural strength of the finished product.

Figures 4 to 7 are schematic cross-sectional diagrams showing the steps of the creation of the highly plastic optical adhesive used in the touch screen bonding process; then, as shown in Figure 4, the liquid crystal The corner C of the display module 110 is filled with high plasticity curable optical glue 122. The filled high plasticity curable optical glue 122 presents a mouth shape following the shape of the corner C, and then the high plasticity curable optical glue 122 is included Different components, such as room temperature curing adhesive, UV curing adhesive or thermal curing adhesive, curing the high plasticity curing optical adhesive 122 on the liquid crystal display module 110, if necessary, curing the liquid crystal display module 110 together with the high plasticity The optical glue 122 is moved into a UV curing machine or a high temperature curing machine for curing.

Then, as shown in FIG. 5, a layer of high plasticity solid optical adhesive 121 is prepared. For example, the above process can be implemented by tiling a layer of high plasticity solid optical adhesive 121 on a lower template in the vacuum laminating chamber ; The shape and size of the high plasticity solid optical adhesive 121 preferably correspond to the shape of the liquid crystal display module 110, but the size preferably falls on the frame 111 but does not exceed the outermost edge of the frame 111, or the shape of the high plasticity solid optical adhesive 121 3. The size and thickness should correspond to and at least be sufficient to fill the shallow groove space SP on the LCD module 110.

Then, as shown in FIG. 6, the liquid crystal display module 110 and the cured high plasticity cured optical adhesive 122 are pressed into the high plasticity solid optical adhesive 121 until the high plasticity solid optical adhesive 121 fills or exceeds the shallow groove space For SP, for example, the above process can be implemented in the following manner. The liquid crystal display module 110 together with the cured high plasticity cured optical adhesive 122 can be higher than the high plasticity solid optical adhesive 121 and the display surface DS is facing downward The high plastic solid optical adhesive 121 laid on the lower template is fixed on a movable template in the chamber of the vacuum laminating machine, and then the chamber is evacuated and the movable template is continuously lowered, and the liquid crystal display module 110 is pressed down On the high plasticity solid optical adhesive 121, the high plasticity solid optical adhesive 121 is squeezed into the shallow groove space SP of the liquid crystal display module 110 until the high plasticity solid optical adhesive 121 fills or exceeds the entire shallow groove space SP.

Then, as disclosed in FIG. 7, after aligning another touch panel 130 and the liquid crystal display module 110 under a vacuum environment, move the touch panel 130 or the liquid crystal display module 110 to make the touch panel 130 and the liquid crystal The display module 110 is bonded together through the high-plasticity solid-state optical glue 121 to form the final touch screen 100.

For example, the above process can be implemented by raising the movable template in the chamber to raise the liquid crystal display module 110 including the high-plasticity solid optical adhesive 121 and the high-plasticity curing optical adhesive 122 to an appropriate height, and then performing activities through rotation The template flips the liquid crystal display module 110 horizontally by 180°, so that the display surface DS of the liquid crystal display module 110 and the highly plastic solid optical adhesive 121 and the highly plastic curable optical adhesive 122 filled therein are turned upward.

Then, the touch panel 130 that has been fixed on the upper template in advance is lowered and the touch panel 130 is pressed onto the high plastic solid optical adhesive 121 from above, and the touch panel 130 is attached to the liquid crystal. On the display module 110, or directly raise the movable template, the liquid crystal display module 110 is lifted up to fit the touch panel 130 on the upper template, and the liquid crystal display module 110 and the touch panel 130 are combined together to form a touch The screen 100 is controlled in a vacuum environment, so no bubbles will remain inside the optical glue after the bonding is completed.

Then, the touch screen 100 after bonding is heated from normal temperature to a temperature between 50°C and 65°C, and is maintained for about 15 minutes to 30 minutes. In such a second secondary heating step, due to temperature The rise causes the high plasticity solid optical adhesive 121 and the high plasticity curing optical adhesive 122 to temporarily melt into a liquid state. The high plasticity solid optical adhesive 121 and the high plasticity curing optical adhesive 122 will re-flow naturally and conform to the shape of the micro gap, filling and deepening again. A micro-gap, and makes it exist between the high plasticity solid optical adhesive 121 and the high plasticity curing optical adhesive 122 The junction NS (see FIG. 6) disappears, and the high-plasticity solid optical adhesive 121 and the high-plasticity-curable optical adhesive 122 whose main components are approximately the same are remelted and mixed together to form an optical adhesive layer 123.

When the rear heating is completed, the original optical adhesive layer 123 will not be left with bubbles, air gaps, light leakage, bright spots, or halos after a period of cooling, resolidification, hardening or bonding at room temperature. Defects, the final predetermined adhesive strength is relatively higher than the conventional liquid optical adhesive, or conventional optical adhesive, has better optical characteristics than the conventional liquid optical adhesive, or conventional optical adhesive, and can also increase the touch screen 100 finished product The physical air tightness and moisture resistance.

Since the first type of high plasticity solid optical adhesive 121 has been pre-cured, the touch screen 100 after lamination does not need to use an additional curing machine or implement a curing step, and the touch screen 100 proposed in this creation Since the entire laminating process is performed in a vacuum environment, the touch screen 100 after lamination does not need to go through another defoaming step, which can save processing time and cost.

This creative system uses two kinds of optical adhesives with the same main components but different physical properties as the adhesive layer between the touch panel and the liquid crystal display module. The first optical adhesive is pre-made before the bonding process begins Cured high-plasticity solid optical adhesive. The second type of optical adhesive is high-plasticity cured optical adhesive that has not been pre-cured before the bonding process. This creation uses high-plasticity cured optical adhesive that has not been pre-cured. The high-plasticity solid optical adhesive that has been pre-cured before the bonding process has better fluidity and lower viscosity but is still sufficient to maintain a certain shape. The high-plasticity curing optical adhesive is dedicated to paving Fill the corners of the liquid crystal display module, and then fill the remaining space with high plastic solid optical glue. Since the two optical glues have roughly the same main components, when the finished touch After the screen is heated for the second time, the junction between the two optical adhesives will disappear, and the two optical adhesives will merge into a single optical adhesive layer.

The above embodiments of this creation can be arbitrarily combined or replaced with each other, so as to derive more implementation forms, but all do not deviate from the scope of the protection of this creation, here are more examples of the creation:

Embodiment 1: A touch screen, which is assembled through a laminating process, and includes: a liquid crystal display module, which is included in the corner where the frame meets the display surface; a touch panel, which is disposed above the display surface, And receive touch input; high plasticity solid optical adhesive, which has been cured before the start of the bonding process; and high plasticity curing optical adhesive, which has not been cured before the bonding process, and is filled in The corner and the vicinity of the corner are provided between the touch panel and the liquid crystal display module together with the high plasticity solid optical glue to bond the touch panel and the liquid crystal display module.

Embodiment 2: The touch screen as described in Embodiment 1, further comprising: the liquid crystal display module, which displays a screen within the range of the display surface, the frame surrounds the display surface, and the frame is higher than the display surface and A level difference is formed between the display surfaces; and the touch panel includes a sensing area, and the sensing area corresponds in position to the display surface.

Embodiment 3: The touch screen as described in Embodiment 2, wherein during the bonding process, the high plasticity cured optical adhesive is spread on the level difference, the corner, and the level difference and the vicinity of the corner.

Embodiment 4: The touch screen as described in Embodiment 3, wherein during the bonding process, the highly plastic curable optical adhesive, the frame, and the display surface jointly form a shallow groove space, and the shallow groove space is for paving Fill the high plasticity solid optical glue.

Embodiment 5: The touch screen as described in Embodiment 1, wherein the highly plastic curable optical adhesive system is based on a silicone polymer and contains additional components selected from room temperature curing adhesive, ultraviolet curing adhesive, Heat curing glue or compound glue.

Embodiment 6: The touch screen as described in embodiment 1, wherein the high plasticity solid optical adhesive and the high plasticity curing optical adhesive have a volume resistance of at least 8×1015 (Ω·cm) and at least 3×1015 (Ω. cm) surface resistance.

Embodiment 7: The touch screen as described in Embodiment 1, wherein the high plasticity solid optical adhesive and the high plasticity curing optical adhesive have a dielectric constant between 2.79 and 2.81.

Embodiment 8: The touch screen as described in Embodiment 1, wherein the high plasticity solid optical adhesive and the high plasticity curing optical adhesive have an adhesive strength between 3.0N-10N (Newton/20mm).

Embodiment 9: The touch screen as described in Embodiment 1, wherein the highly plastic solid optical adhesive and the highly plastic curable optical adhesive are bonded at a temperature between 50°C and 65°C after the bonding is completed After heating for 15 minutes to 30 minutes, after cooling, it finally reaches an adhesive strength between 3.0N~10N (Newton/20mm) and has a light transmittance of greater than 91%.

Embodiment 10: The touch screen as described in Embodiment 1, wherein the high plasticity solid optical adhesive and the high plasticity curing optical adhesive form a layer of optical adhesive together after the bonding process is completed.

The embodiments of this creation can be arbitrarily combined or replaced with each other, so as to derive more implementation forms, but all do not deviate from the scope of protection of this creation. The definition of the protection scope of this creation is based on the The record shall prevail.

DS‧‧‧Display

NS‧‧‧Interface

110‧‧‧LCD display module

121‧‧‧High plasticity solid optical adhesive

122‧‧‧High plasticity curing optical adhesive

Claims (10)

A touch screen is assembled through a laminating process, and includes: a liquid crystal display module, which includes a corner where a frame meets a display surface; a touch panel, which is disposed on the display surface Above, and receives a touch input; a high plasticity solid glue, which has been cured before the start of the bonding process; and a high plasticity curing glue, which has not been cured before the start of the bonding process, and It is paved in the corner and near the corner, and is arranged between the touch panel and the liquid crystal display module together with the high plastic solid glue to bond the touch panel and the liquid crystal display module. The touch screen according to claim 1, further comprising: the liquid crystal display module, which displays a picture within the range of the display surface, the frame surrounds the display surface, the frame is higher than the display surface and the A difference is formed between the display surfaces; and the touch panel includes a sensing area corresponding to the display surface in position. The touch screen as recited in claim 2, wherein during the bonding process, the highly plastic curable adhesive is spread on the step, the corner, and the step and the vicinity of the corner. The touch screen according to claim 3, wherein during the bonding process, the high plastic curing adhesive, the frame, and the display surface jointly form a shallow groove space for filling the shallow groove space High plasticity solid glue. The touch screen according to claim 1, wherein the high plastic curing adhesive is made of an organic silicon polymer The compound is a substrate and includes an additional component selected from one of a room temperature curing adhesive, an ultraviolet curing adhesive, a thermal curing adhesive, a composite adhesive, and combinations thereof. The touch screen according to claim 1, wherein the high-plasticity solid adhesive and the high-plasticity curing adhesive have a volume resistance of at least 8×10 ¹⁵ (Ω·cm) and at least 3×10 ¹⁵ (Ω·cm) Surface resistance. The touch screen as recited in claim 1, wherein the high plastic solid glue and the high plastic solidified glue have a dielectric constant between 2.79 and 2.81. The touch screen according to claim 1, wherein the high-plasticity solid adhesive and the high-plasticity curing adhesive have an adhesive strength between 3.0N and 10N (Newton/20mm). The touch screen according to claim 1, wherein the highly plastic solid glue and the highly plastic curable glue are heated at a temperature between 50°C and 65°C for 15 minutes after the bonding is completed After 30 minutes, after cooling, the adhesive strength between 3.0N and 10N (Newton/20mm) is finally reached, and the light transmission rate is greater than 91%. The touch screen according to claim 1, wherein the high-plasticity solid adhesive and the high-plasticity curing adhesive form a layer of optical adhesive together after the bonding process is completed.

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