TW201939231A - Touch sensing film with structure easy to fold reversely - Google Patents

Abstract

The invention provides a touch sensing film with a structure easy to fold reversely. The touch sensing film is applied to a touch panel. The touch sensing film is bonded with the upper surface of a display module of the touch panel, and is partially and reversely folded to a side surface of the display module through a reversely folded corner; the touch sensing film comprises a locating slot; the locating slot is formed in the reversely folded corner and used for accurately controlling a reversely folded position and reducing a stress when the touch sensing film is reversely folded.

Description

Touch-sensitive film with easy-reverse structure

The technology of the present invention relates to the field of touch display devices, and particularly to a touch sensing film having an easily-reflexed structure at a corner.

Touch panels are widely used in external input interfaces of instruments due to their characteristics of human-computer interaction and diverse design. And with the advancement of science and technology, people have higher and higher requirements for the quality of electronic products. Under fierce competition, electronics manufacturers have aimed at aesthetics, lightness, thinness, and narrowness. At the same time, they hope that their LCD screens will become larger and larger. it is good.

Generally speaking, the border area around the LCD screen does not have a display effect, and the presence of the border area also affects the visual aesthetic effect. Therefore, electronics manufacturers are committed to developing the frame shrink technology.

In order to achieve the effect of a narrow bezel, the touch module currently uses circuit trace reduction technology. However, the minimization of the frame area has its practical limitations. At present, the circuit trace reduction has reached 10/10 level. Miniaturization of lines requires high manufacturing costs, which is not economical. In addition, some manufacturers have developed a technology that bends the edges of the sensing electrode. However, this technology still has the area of the folded back affected by the stress of the touch sensing film itself, which easily causes the problem of poor bonding. In addition, the touch sensing film During the reverse folding process, there may be problems with inaccurate alignment due to positioning errors or tolerances of the fitting instrument, so it still needs to be improved.

The main purpose of the present invention is to improve the problems encountered in the current frame shrinking technology of touch module. In order to achieve the above-mentioned object, the present invention adopts the following technical means to achieve it. Among them, the present invention provides a touch-sensitive film with an easily reversible structure, which is applied to a touch panel. The touch-sensitive film and the touch The upper surface of a display module of the panel is adhered, and is folded back to a side of the display module through a reverse chamfered portion, characterized in that the touch sensing film includes a positioning groove, and the positioning groove is disposed on the reverse The corners are used to accurately control the position of the rebend and reduce the stress of the touch-sensitive film when it is rebend.

In a preferred embodiment of the present invention, the touch sensing film is an indium tin oxide (ITO) film.

In a preferred embodiment of the present invention, the positioning groove is U-shaped or V-shaped.

In a preferred embodiment of the present invention, the positioning groove further includes a reinforcing member filled in the positioning groove.

In a preferred embodiment of the present invention, the positioning groove is a U-shaped groove, and the diameter of the U-shaped groove is greater than 0.6 mm.

In a preferred embodiment of the present invention, the positioning groove is a V-shaped groove, and the width of the V-shaped groove is greater than 0.6 mm.

In a preferred embodiment of the present invention, the display module is a liquid crystal screen or an organic light emitting diode.

In a preferred embodiment of the present invention, the touch sensing film has a sensing electrode, and a horizontal distance between the sensing electrode and the positioning groove is greater than 1 mm.

In a preferred embodiment of the present invention, the touch sensing film further has a border circuit trace, and the border circuit trace is used to transmit a touch signal of the sensing electrode.

In a preferred embodiment of the present invention, the positioning groove and the sensing electrode are respectively disposed on different sides of the touch sensing film.

In order to achieve the above-mentioned object and effect, the technical means and structure adopted in the present invention are described in detail below with reference to the preferred embodiments of the present invention. The features and functions are as follows. The above contents do not constitute a limitation of the present invention.

Please refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4 at the same time, which are schematic diagrams of a touch panel, a partial schematic diagram of a touch sensing film, and a Folding schematic diagram 1 and easy reversible folding diagram diagram 2. The touch-sensing film 2 with the easy-refolding structure of the present invention is applied to a touch panel 1 with a narrow bezel requirement. The touch-panel 1 may basically include a display module 3, a touch-sensitive film 2 and a The cover plate 7 is adhered through an optical glue (OCA) 4. The touch sensing film 2 can be an indium tin oxide (ITO) film commonly used in touch panel manufacturing, the display module 3 can be a liquid crystal screen or an organic light emitting diode (OLED), and the cover plate 7 It is a transparent protective cover commonly used in touch panels to enhance the overall structure and protect internal components. It can be a glass cover, but it is not limited to this.

The touch sensing film 2 can be adhered to the upper surface 31 of the display module 3 through the optical adhesive 4 and can be folded back to a side surface 32 of the display module 3 through a reverse chamfer 20. The touch sensing film 2 has a first surface 21 and a second surface 22. The first surface 21 is adhered to the display module 3. The first surface 21 has a sensing electrode 51 and a sensing electrode 51. The bezel circuit trace 52, the sensing electrode 51 may specifically include components such as a sensing circuit (Rx) 511, an insulation layer 512, and a driving circuit (Tx) 513 which are common in general touch modules. The frame circuit trace 52 is electrically connected to the sensing electrode 51 and separated by another insulating layer 512. The frame circuit trace 52 is used to transmit the touch signal of the sensing electrode 51 to the integrated circuit (IC). Drive line pins (not shown).

The second surface 22 of the touch sensing film 2 includes a positioning groove 6. The positioning groove 6 is provided corresponding to an edge of the upper surface 31. Specifically, the positioning groove 6 may be U-shaped or V-shaped and provided. At the reflexed angle of 20. The positioning groove 6 can be used to reduce the stress of the touch sensing film 2 when it is folded back. In addition, the positioning groove 6 can also be used as a positioning mark during the process of the touch sensing film 2 being folded back. During the manufacturing process, the bonding instrument can more accurately control the reverse folding position of the touch sensing film 2. In this embodiment, the positioning groove 6 is a U-shaped groove. Considering the effect of the U-shaped groove and the ease of manufacturing, the preferred diameter V of the U-shaped groove should be greater than 0.6 mm. The depth of the U-shaped groove is not limited, and the depth of the U-shaped groove is preferably not more than one half of the overall thickness of the touch sensing film 2.

In an embodiment of the present invention, the positioning groove 6 further includes a reinforcing member 61, and the reinforcing member 61 is filled in the positioning groove. The reinforcing member 61 is filled in the positioning groove 6 after the touch sensing film 2 is reversely folded. It can be a structural adhesive or a reinforced adhesive to strengthen the strength of the touch sensing film 2 at the reverse bending leg.

It is worth mentioning that the distance between the sensing electrode 51 and the anti-reflection angle 20 can make the sensing electrode 51 difficult to affect its function due to the back-folding of the touch sensing film. In addition, the reserved distance can also avoid sticking to the instrument. Close tolerances or errors to reduce product failure rates. Preferably, the horizontal distance A between the sensing electrode 51 and the positioning groove 6 should be greater than 1 millimeter (mm).

Please refer to FIG. 5, which is a schematic diagram of a second embodiment of a touch sensing film with an easy-refold structure according to the present invention. In the second embodiment of the present invention, the first surface 21 of the touch-sensing film 2a having the easy-refolding structure also has a sensing electrode 51 and a frame circuit trace 52, and a second groove 22 also includes a positioning groove. 6a is different from the preferred embodiment of the present invention in that the positioning groove 6a is a V-shaped groove. Considering the effect of the V-shaped groove and the difficulty of the process, the preferred diameter W of the V-shaped groove should be It is larger than 0.6 mm, and the present invention does not limit the depth of the V-shaped groove, and the depth of the V-shaped groove is preferably not more than one half of the overall thickness of the touch sensing film 2a.

Therefore, referring to all the drawings, the present invention provides a touch-sensitive film with a structure that is easy to fold back. Compared with conventional technology, the positioning grooves can not only reduce the stress when the touch-sensitive film is folded back. In addition, positioning marks can also be provided, so that the touch-sensitive film can more accurately control the refold position.

Through the above detailed description, it can fully show that the purpose and efficacy of the present invention are progressive in implementation, have great industrial utility value, and are new inventions that have never been seen on the market today, and fully meet the requirements of invention patents , Apply according to law. The above description is only the preferred embodiments of the present invention, and it does not limit the implementation and protection scope of the present invention. For those skilled in the art, they should be able to realize that the use of the description and illustrated content of the present invention can make Solutions obtained by equivalent substitutions and obvious changes should all be included in the protection scope of the present invention.

1‧‧‧ touch panel

2, 2a‧‧‧ touch sensing film

20‧‧‧Anti-bevel

21‧‧‧first surface

22‧‧‧ second surface

3‧‧‧Display Module

31‧‧‧ Top surface

32‧‧‧ side

4‧‧‧ Optical Adhesive

51‧‧‧Induction electrode

511‧‧‧sensing circuit

512‧‧‧ insulation

513‧‧‧Drive circuit

52‧‧‧Frame circuit routing

6, 6a‧‧‧ positioning groove

61‧‧‧ Reinforcement

7‧‧‧ Cover

V, W‧‧‧Width

A‧‧‧Horizontal distance

FIG. 1 is a schematic diagram of a touch panel according to a preferred embodiment of a touch sensing film with an easy-to-fold structure according to the present invention. FIG. 2 is a partial schematic diagram of a touch sensing film according to a preferred embodiment of the touch sensing film with an easy-refold structure according to the present invention. FIG. 3 is the first schematic diagram of the easy-reflection of the touch sensing film with the easy-reflex structure according to the preferred embodiment of the present invention. FIG. 4 is a second schematic diagram of the easy-to-reverse touch sensing film with the easy-to-reverse structure of the present invention. FIG. 5 is a schematic diagram of a sensing electrode of a second embodiment of a touch sensing film with an easy-refold structure according to the present invention.

Claims (10)

A touch-sensing film with an easily-reversed structure is applied to a touch panel. The touch-sensing film is adhered to the upper surface of a display module of the touch panel and is folded back to One side of the display module is characterized in that: the touch sensing film includes a positioning groove, which is provided at the reverse corner, for accurately controlling the position of the reverse folding and reducing the stress. According to the touch sensing film with an easily-reversible structure according to item 1 of the scope of the patent application, the touch sensing film is an indium tin oxide film (Indium Tin Oxide). According to the touch sensing film with an easily-reversible structure described in item 1 of the scope of the patent application, the positioning groove is U-shaped or V-shaped. As described in item 3 of the scope of the patent application, the touch sensing film with an easy-to-fold structure, wherein the positioning groove further includes a reinforcing member filled in the positioning groove. According to the touch sensing film with an easily-reversible structure described in item 3 of the scope of the patent application, the positioning groove is a U-shaped groove, and the diameter of the U-shaped groove is greater than 0.6 mm. According to the touch sensing film with an easy-refold structure described in item 3 of the scope of the patent application, the positioning groove is a V-shaped groove, and the width of the V-shaped groove is greater than 0.6 mm. According to the touch sensing film with an easily reversible structure described in item 1 of the scope of patent application, wherein the display module is a liquid crystal screen or an organic light emitting diode. According to the touch sensing film with an easily reversible structure according to item 1 of the scope of the patent application, the touch sensing film has a sensing electrode, and a horizontal distance between the sensing electrode and the positioning groove is greater than 1 mm. For example, the touch sensing film with an easily-reversible structure described in item 8 of the scope of the patent application, wherein the touch sensing film further has a border circuit trace, which is used to transmit the touch signal of the sensing electrode. . According to the touch-sensing film with an easily-reversible structure according to item 8 of the scope of the patent application, the positioning groove and the sensing electrode are respectively disposed on different surfaces of the touch-sensing film.