TWI734508B - Touch display module and manufacturing method thereof - Google Patents

Abstract

A touch display module includes a liquid crystal display module, a touch module and a frame. The liquid crystal display module includes a back light unit and a liquid crystal panel. The back light unit has a flexible printed circuit. The liquid crystal panel is disposed on the back light unit. The touch panel is disposed on the liquid crystal display module. The frame is disposed on the back light unit. The frame at least partially surrounds the liquid crystal panel and supports the touch panel. The frame has an opening. The flexible printed circuit at least partially penetrates through the opening and electrically connects with the liquid crystal panel.

Description

Touch display module and manufacturing method thereof

The invention relates to a touch display module and a manufacturing method of the touch display module.

With the advancement of technology today, electronic products have become an indispensable part of people's daily lives. Among them, electronic products with display screens and even touch screens are becoming more and more popular.

Today, the industry has introduced curved touch screens in response to demand. Because of the higher technical requirements, how to maintain the quality of the curved touch screen is undoubtedly an important development direction in the industry.

Furthermore, making electronic products lighter and thinner is also recognized as a basic element of the advancement of electronic products. However, in the traditional structure, the touch module of the electronic product is arranged on the upper baffle of the backlight module by the plastic frame. Due to the existence of the upper baffle, it is difficult for general electronic products to achieve the thinning effect. . Moreover, in the traditional structure, in order to improve the structural strength of electronic products, the connection between the plastic frame and the backlight module, as well as the connection with the touch module, requires coating a large amount of room temperature vulcanization rubber (room temperature vulcanization). temperature vulcanization compound; 　RTV). Furthermore, a large amount of room temperature vulcanizate must be coated between the upper baffle and the display module in the electronic product.

One of the objectives of the present invention is to provide a touch display module, which can effectively achieve the effect of thinning at low cost.

According to an embodiment of the present invention, a touch display module includes a liquid crystal display module, a touch module, and a frame. The liquid crystal display module includes a backlight unit and a liquid crystal panel. The backlight unit has a flexible circuit board. The liquid crystal panel is arranged on the backlight unit. The touch control module is arranged on the liquid crystal display module. The frame is arranged on the backlight unit, at least partially surrounds the liquid crystal panel, and carries the touch module. The frame has a breach, and the flexible circuit board at least partially penetrates the breach to be electrically connected to the liquid crystal panel.

In one or more embodiments of the present invention, the above-mentioned liquid crystal display module further includes a sealant, and the sealant is filled in the gap between the side surface of the liquid crystal panel and the frame.

In one or more embodiments of the present invention, the above-mentioned liquid crystal panel further includes a polarizer and a substrate. The polarizer is arranged on the substrate, and the sealant is filled between the polarizer and the frame.

In one or more embodiments of the present invention, the aforementioned touch display module further includes optical glue. The optical glue is filled between the frame, the liquid crystal panel and the touch module.

In one or more embodiments of the present invention, the aforementioned frame further includes a glue injection hole. The glue injection hole is located on the side wall of the frame with a breach, and the glue injection hole is configured to allow the optical glue to be injected between the frame, the liquid crystal panel and the touch module.

In one or more embodiments of the present invention, the above-mentioned liquid crystal panel has a display surface, the display surface faces the touch module, the touch module has a touch surface, the touch surface is away from the liquid crystal panel, and the display surface and the touch surface are The curved surface and the curved axis of the curved surface are parallel to each other.

In one or more embodiments of the present invention, the above-mentioned liquid crystal panel has a display surface, the display surface faces the touch module, the touch module has a touch surface, the touch surface is away from the liquid crystal panel, the display surface and the touch surface are respectively At least part of it is a curved surface, and the curved surface on the display surface corresponds to the curved surface on the touch surface, and the bending axes of the corresponding curved surfaces are parallel to each other.

One of the objectives of the present invention is to provide a method for manufacturing a touch display module, which can produce a thin touch display module at low cost.

According to an embodiment of the present invention, a method for manufacturing a touch display module includes: (1) providing a liquid crystal display module, the liquid crystal display module includes a backlight unit and a liquid crystal panel, the backlight unit has a flexible circuit board, and the liquid crystal panel is disposed on On the backlight unit; (2) Set the frame body on the backlight unit, and make the frame body at least partially surround and abut against the liquid crystal panel, the frame body has a breach; Electrical connection; and (4) abutting the frame with the touch module and separating the liquid crystal panel and the touch module from each other.

In one or more embodiments of the present invention, the aforementioned frame has a glue injection hole. The manufacturing method further includes: injecting optical glue between the frame, the liquid crystal panel and the touch module through the glue injection hole.

In one or more embodiments of the present invention, the above-mentioned manufacturing method further includes: filling a sealant in the gap between the side surface of the liquid crystal panel and the frame.

The above-mentioned embodiments of the present invention have at least the following advantages:

(1) Since the frame is connected between the touch module and the backlight unit, and the optical glue is filled between the liquid crystal panel and the touch module by injection, it is not easy for the optical glue to interact with the touch module. The defect of uneven contact appears, and the distance between the touch module and the liquid crystal panel can be effectively reduced, which helps the touch display module to achieve a thinning effect.

(2) Since the optical glue is filled between the frame, the liquid crystal panel and the touch module by injection, no matter whether the curvature of the display surface and the curvature of the touch surface are the same or different, the optical The glue can be filled between the frame, the liquid crystal panel and the touch module. In this way, the curvature of the display surface is not limited to the curvature of the touch surface. Therefore, in actual operation, the user can make the liquid crystal panel have a display surface with a certain curvature, which can be matched with the touch surface. The touch control modules with different curvatures of the control surface are beneficial to simplify the production of the touch display module and effectively reduce the production cost of the touch display module.

Hereinafter, a plurality of embodiments of the present invention will be disclosed in drawings. For clear description, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some conventionally used structures and elements will be drawn in a simple schematic manner in the drawings, and in all the drawings, the same reference numerals will be used to denote the same or similar elements. . And if it is possible in implementation, the features of different embodiments can be applied interactively.

Unless otherwise defined, all words (including technical and scientific terms) used in this article have their usual meanings, and their meanings can be understood by those familiar with the field. Furthermore, the definitions of the above-mentioned words in commonly used dictionaries should be interpreted as meaning consistent with the relevant fields of the present invention in the content of this specification. Unless specifically defined, these terms will not be interpreted as idealized or overly formal meanings.

Please refer to Figure 1. FIG. 1 is a flowchart showing a manufacturing method 100 of a touch display module 300 (for finished products, please refer to FIG. 8) according to an embodiment of the present invention. In this embodiment, as shown in Figure 1, the manufacturing method 100 includes the following steps (it should be understood that the steps mentioned in some embodiments can be adjusted according to actual needs, unless the order is specifically stated. The order before and after, can even be executed simultaneously or partly at the same time):

(1) Provide a liquid crystal display module 310 (step 110).

Specifically, please refer to Figure 2. FIGS. 2-7 are schematic cross-sectional diagrams illustrating the manufacturing process of the touch display module 300 in FIG. 1. In this embodiment, as shown in FIG. 2, the liquid crystal display module 310 includes a backlight unit 311 and a liquid crystal panel 312. The liquid crystal panel 312 is disposed on the backlight unit 311, and the backlight unit 311 has a flexible circuit board 316. Specifically, the liquid crystal panel 312 includes a substrate 313, a polarizer 315, and a polarizer 319. The substrate 313 includes a color filter 313a and a thin film transistor 313b. The polarizer 315 is disposed on the color filter 313a of the substrate 313. The color filter The light sheet 313a is disposed on the side of the thin film transistor 313b away from the backlight unit 311, and the color filter 313a and the thin film transistor 313b are stacked between the polarizer 315 and the polarizer 319, and the polarizer 319 abuts against the backlight unit 311 .

(2) Set the frame 317 on the backlight unit 311, and make the frame 317 at least partially surround and abut the liquid crystal panel 312 (step 120), as shown in FIG. 3. Specifically, in the present embodiment, the frame body 317 at least partially abuts the thin film transistor 313b of the liquid crystal panel 312, and the frame body 317 has a breach O.

In practical applications, the frame 317 can be made of polymer material, polymer multilayer film or metal material, etc., but the present invention is not limited to this. Furthermore, the surface of the frame 317 may be a non-reflective color such as black, or the surface of the frame 317 may be surface-treated to have a low reflectivity, so that the frame 317 does not cause unnecessary optical reflection.

(3) Make the flexible circuit board 316 at least partially pass through the opening O of the frame 317 to be electrically connected to the liquid crystal panel 312 (step 130), as shown in FIG. 4. More specifically, the thin film transistor 313b and the backlight unit 311 are electrically connected by a flexible circuit board 316. For example, as shown in Figure 4, one end of the flexible circuit board 316 is electrically connected to the side of the backlight unit 311 away from the liquid crystal panel 312, and the other end of the flexible circuit board 316 is electrically connected to the thin film transistor 313b away from the backlight unit 311 One side.

In addition, please refer to Figure 5. In this embodiment, as shown in FIG. 4, the step of arranging the frame 317 on the backlight unit 311 (that is, step 120) further includes:

(2.1) Fill the gap between the side surface of the liquid crystal panel 312 and the frame 317 with a sealant 318 (step 121). With the sealant 318 abutting the frame 317 and the liquid crystal panel 312 at the same time, the sealant 318 can cover the connection between the frame 317 and the side surface of the liquid crystal panel 312 to seal the frame 317 and the liquid crystal panel 312. Specifically, the sealant 318 is filled between the polarizer 315 and the frame 317. Furthermore, for example, the sealant 318 may be room temperature vulcanization compound ("RTV), but the present invention is not limited thereto.

Furthermore, as shown in Figure 1, the manufacturing method 100 further includes:

(4) The touch module 320 is abutted against the frame 317, and the liquid crystal panel 312 and the touch module 320 are separated from each other (step 140), as shown in FIG. 6.

It is worth noting that the liquid crystal panel 312 of the liquid crystal display module 310 has a display surface 312a, the display surface 312a of the liquid crystal panel 312 faces the touch module 320, and the touch module 320 has a touch surface 320a. The touch surface 320a is far away from the liquid crystal panel 312 of the liquid crystal display module 310, the display surface 312a and the touch surface 320a are curved surfaces, and the bending axes of the curved surfaces are parallel to each other. More specifically, the curved display surface 312a has a bending axis X1, the curved touch surface 320a has a bending axis X2, and the bending axis X1 of the display surface 312a and the bending axis X2 of the touch surface 320a overlap each other, that is, the display The bending axis X1 of the surface 312a and the bending axis X2 of the touch surface 320a are parallel to each other.

For example, as shown in FIG. 6, both the touch module 320 and the liquid crystal display module 310 are bent downward, that is, the touch module 320 is bent to have a convex shape. Furthermore, in this embodiment, the curved display surface 312a has a curvature C1 around the bending axis X1, and the curved touch surface 320a has a curvature C2 around the bending axis X2. In practical applications, the curvature C1 of the display surface 312a and the curvature C2 of the touch surface 320a may be at least partially the same or at least partially different.

Furthermore, specifically, the frame 317 has a thickness TK along the arrangement direction DA of the touch module 320 and the backlight unit 311, so that the touch module 320 and the backlight unit 311 are separated by the same distance as the thickness TK. In practical applications, the thickness TK of the frame body 317 is greater than or equal to 0.5 mm, but the present invention is not limited to this.

Furthermore, as shown in FIG. 6, after the touch module 320 abuts the frame 317, the frame 317 is connected between the touch module 320 and the backlight unit 311, and the liquid crystal panel 312 and the touch module There is a distance DT between 320. More specifically, there is a distance DT between the polarizer 315 and the touch module 320. In practical applications, the distance DT is greater than or equal to 0.05 mm, but the present invention is not limited to this.

(5) Inject the optical glue 330 between the frame 317, the liquid crystal panel 312 and the touch module 320 through the glue hole H of the frame 317 (step 150). Please refer to Figure 7. In this embodiment, as shown in FIG. 7, the frame body 317 further includes a glue hole H. The glue injection hole H is located on the side wall of the frame 317 with the opening O. The glue injection hole H of the frame 317 is configured to allow the optical glue 330 to be injected between the frame 317, the liquid crystal panel 312 and the touch module 320. Specifically, after the touch module 320 abuts the frame 317, the user can use the injection tool 400 through the glue injection hole H to inject and fill the optical glue 330 into the frame 317, the liquid crystal panel 312, and the touch panel. Between the modules 320, for example, the optical glue 330 may be a silicone optical clear resin (“SOCR”), but the present invention is not limited to this. In addition, according to actual conditions, the optical glue 330 can also be injected between the frame 317, the liquid crystal panel 312 and the touch module 320 through the opening O of the frame 317, but the present invention is not limited to this.

Please refer to Figure 8. FIG. 8 is a schematic cross-sectional view showing the finished product of the touch display module 300 of FIG. 1. In this embodiment, as shown in FIG. 8, the touch display module 300 includes a liquid crystal display module 310, a touch module 320, a frame 317 and an optical glue 330. The liquid crystal display module includes a backlight unit 311 and a liquid crystal panel 312. The backlight unit 311 has a flexible circuit board 316. The liquid crystal panel 312 is disposed on the backlight unit 311. The touch module 320 is disposed on the liquid crystal display module 310. The frame 317 is disposed on the backlight unit 311, at least partially surrounds and abuts the liquid crystal panel 312, and carries the touch module 320. The liquid crystal panel 312 of the liquid crystal display module 310 has a display surface 312a, the display surface 312a of the liquid crystal panel 312 faces the touch module 320, the touch module 320 has a touch surface 320a, and the touch surface 320a of the touch module 320 is far away The liquid crystal panel 312, the display surface 312a and the touch surface 320a of the liquid crystal display module 310 are all curved surfaces, and the bending axes of the curved surfaces are parallel to each other.

Furthermore, the curved display surface 312a has a curvature C1 around the bending axis X1, the curved touch surface 320a has a curvature C2 around the bending axis X2, and the curvature C1 of the display surface 312a and the curvature C2 of the touch surface 320a can be They are at least partly the same as each other or at least partly different from each other. The frame 317 is connected between the touch module 320 and the backlight unit 311 to separate the liquid crystal panel 312 and the touch module 320 from each other. The frame 317 has a breach O, and the flexible circuit board 316 at least partially penetrates the breach O of the frame 317 to be electrically connected to the liquid crystal panel 312. The optical glue 330 is filled between the frame 317, the liquid crystal panel 312 and the touch module 320.

In the case of the manufacturing method 100, since the frame 317 is connected between the touch module 320 and the backlight unit 311, and the optical glue 330 is injected between the liquid crystal panel 312 and the touch module 320 Therefore, the optical glue 330 is not prone to uneven contact with the touch module 320, and the distance DT between the touch module 320 and the liquid crystal panel 312 can be effectively reduced, which is helpful for the touch display module 300 Achieve the thinning effect.

According to actual conditions, the curvature C1 of the display surface 312a and the curvature C2 of the touch surface 320a may be at least partially different, or may be at least partially the same. However, as described above, since the optical glue 330 is filled between the frame 317, the liquid crystal panel 312 and the touch module 320 by injection, it does not matter whether the curvature C1 of the display surface 312a or the touch surface 320a is Whether the curvature C2 is the same or different, the optical glue 330 can be filled between the frame 317, the liquid crystal panel 312, and the touch module 320. In this way, the curvature C1 of the display surface 312a is not limited to the curvature C2 of the touch surface 320a. Therefore, in actual operation, the user can make the liquid crystal panel 312 have a display surface 312a with a certain curvature C1. Therefore, it can be matched with the touch module 320 with different curvatures C2 on the touch surface 320a, thereby simplifying the production of the touch display module 300 and effectively reducing the production cost of the touch display module 300. It is worth noting that the curvature C1 of the display surface 312a and the curvature C2 of the touch surface 320a can be two-dimensional or three-dimensional curvature, that is, according to actual conditions, the display surface 312a and the touch surface 320a can be One-dimensional surface or two-dimensional hyperboloid.

Please refer to Figure 9. FIG. 9 is a schematic cross-sectional view of a finished product of the touch display module 300 according to another embodiment of the present invention. In this embodiment, the display surface 312a of the liquid crystal panel 312 and the touch surface 320a of the touch module 320 are respectively at least partially curved, and the curved surface on the display surface 312a corresponds to the curved surface on the touch surface 320a, and is The bending axis X1 of the curved display surface 312a and the bending axis X2 of the curved touch surface 320a are parallel to each other. For example, as shown in FIG. 9, the display surface 312a and the touch surface 320a are substantially planar at the central positions, respectively, and the curved portion of the display surface 312a is located on opposite sides, and the touch surface 320a is curved. Parts are correspondingly located on opposite sides.

Please refer to Figure 10. FIG. 10 is a schematic cross-sectional view of a finished product of the touch display module 300 according to another embodiment of the present invention. In this embodiment, as shown in FIG. 10, the curved portion of the display surface 312a is located at the center, and the curved portion of the touch surface 320a is also located at the center correspondingly. In contrast, the opposite sides of the display surface 312a and the opposite sides of the touch surface 320a are substantially planar.

Please refer to Figure 11. FIG. 11 is a schematic cross-sectional view of a finished product of the touch display module 300 according to another embodiment of the present invention. As shown in FIG. 11, when the manufacturing method 100 is adopted, the touch module 320 and the liquid crystal display module 310 of the touch display module 300 can also be bent upward according to actual conditions, that is, the touch module 320 is curved into a concave shape.

In summary, the technical solutions disclosed in the foregoing embodiments of the present invention have at least the following advantages:

(1) Since the frame is connected between the touch module and the backlight unit, and the optical glue is filled between the liquid crystal panel and the touch module by injection, it is not easy for the optical glue to interact with the touch module. The defect of uneven contact appears, and the distance between the touch module and the liquid crystal panel can be effectively reduced, which helps the touch display module to achieve a thinning effect.

(2) Since the optical glue is filled between the frame, the liquid crystal panel and the touch module by injection, no matter whether the curvature of the display surface and the curvature of the touch surface are the same or different, the optical The glue can be filled between the frame, the liquid crystal panel and the touch module. In this way, the curvature of the display surface is not limited to the curvature of the touch surface. Therefore, in actual operation, the user can make the LCD panel have a display surface with a certain curvature to match the touch surface The touch modules with different degrees of curvature are beneficial to simplify the production of touch display modules and can effectively reduce the production cost of the touch display modules.

100: manufacturing method 110~150,121: Step 300: Touch display module 310: Liquid crystal display module 311: Backlight unit 312: LCD panel 312a: display surface 313: substrate 313a: Color filter 313b: thin film transistor 315: Polarizer 316: flexible circuit board 317: Frame 318: Sealant 319: Polarizer 320: Touch module 320a: touch surface 330: Optical glue 400: Injection tool C1: curvature C2: curvature DA: Arrangement direction DT: distance H: Injection hole O: breach TK: Thickness X1: Bending shaft X2: Bending shaft

FIG. 1 is a flowchart showing a manufacturing method of a touch display module according to an embodiment of the present invention. FIGS. 2-7 are schematic cross-sectional views showing the manufacturing process of the touch display module of FIG. 1. FIG. FIG. 8 is a schematic cross-sectional view showing the finished product of the touch display module of FIG. 1. FIG. FIG. 9 is a schematic cross-sectional view of a finished product of a touch display module according to another embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of a finished product of a touch display module according to still another embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of a finished product of a touch display module according to another embodiment of the present invention.

Domestic deposit information (please note in the order of deposit institution, date and number) none Foreign hosting information (please note in the order of hosting country, institution, date, and number) none

300: Touch display module

310: Liquid crystal display module

311: Backlight unit

312: LCD panel

312a: display surface

313: substrate

313a: Color filter

313b: thin film transistor

315: Polarizer

316: flexible circuit board

317: Frame

318: Sealant

319: Polarizer

320: Touch module

320a: touch surface

330: Optical glue

C1: curvature

C2: curvature

DA: Arrangement direction

DT: distance

O: breach

TK: Thickness

X1: Bending shaft

X2: Bending shaft

Claims (10)

A touch display module includes: a liquid crystal display module, including: a backlight unit with a flexible circuit board; and a liquid crystal panel arranged on the backlight unit; a touch module arranged on the liquid crystal display On the module; and a frame, which is disposed on the backlight unit and at least partially surrounds and abuts the liquid crystal panel, and carries the touch module, wherein the frame has a breach, and the flexible circuit board at least partially passes through The breach is electrically connected to the liquid crystal panel. The touch display module according to claim 1, wherein the liquid crystal display module further includes a sealant, and the sealant is filled in the gap between the side surface of the liquid crystal panel and the frame. The touch display module according to claim 2, wherein the liquid crystal panel further includes a polarizer and a substrate, the polarizer is disposed on the substrate, and the sealant is filled between the polarizer and the frame between. The touch display module according to claim 1, further comprising an optical glue, which is filled between the frame, the liquid crystal panel and the touch module. The touch display module according to claim 4, wherein the frame further includes a glue injection hole, and the glue injection hole is located on the side of the frame with the breach The wall is configured to allow the optical glue to be injected between the frame, the liquid crystal panel and the touch module. The touch display module according to claim 1, wherein the liquid crystal panel has a display surface, the display surface faces the touch module, the touch module has a touch surface, and the touch surface is away from the liquid crystal The panel, the display surface and the touch surface are curved surfaces and the bending axes of the curved surfaces are parallel to each other. The touch display module according to claim 1, wherein the liquid crystal panel has a display surface, the display surface faces the touch module, the touch module has a touch surface, and the touch surface is away from the liquid crystal In the panel, the display surface and the touch surface are respectively at least partially curved, and the curved surface on the display surface corresponds to the curved surface on the touch surface, and the bending axes of the corresponding curved surfaces are parallel to each other. A method for manufacturing a touch display module includes: providing a liquid crystal display module, the liquid crystal display module including a backlight unit and a liquid crystal panel, the backlight unit has a flexible circuit board, the liquid crystal panel is arranged on the backlight unit On; set a frame in the backlight unit, and make the frame at least partially surround and abut the liquid crystal panel, the frame has a breach; the flexible circuit board at least partially through the breach and the liquid crystal The panel is electrically connected; and a touch module is used to abut the frame, and the liquid crystal panel and the touch module The groups are separated from each other. The manufacturing method according to claim 8, wherein the frame has an injection hole, and the manufacturing method further comprises: injecting an optical glue into the frame, the liquid crystal panel and the touch module through the injection hole. between. The manufacturing method according to claim 8, further comprising: filling a gap between the side surface of the liquid crystal panel and the frame body with a sealant.

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