TWI481928B - Touch panel and touchscreen employing the same - Google Patents

Description

Touch panel and touch display device therewith

The invention relates to a touch panel structure, in particular to a film type capacitive touch panel structure.

The touch panel is currently the most popular human-machine interface, and is widely used in various household products such as household appliances and consumer electronic products. Due to the mature process and lower cost, the market share of small and medium-sized projected capacitive touch panels is expected to surpass the traditional resistive touch panels for the first time in 2011.

At present, the touch panel design supporting multi-point control is mostly a two-layer structure, and the change of capacitance between the upper and lower electrodes (ITO) is used to detect the actuation position, and the glass type and the film type are distinguished according to the substrate type. (film type) Two types of film type capacitive touch panels have the advantages of easy processing and low cost.

The structure of a general film type capacitive touch panel 1' is as shown in FIG. 1 and FIG. 2, and an optical adhesive is disposed between the first electrode film 2' and the second electrode film 4' ( The optical clear adhesive 3', therefore, the bonding regions 21', 41' of the first electrode film 2' and the second electrode film 4' are in different planes.

Referring to FIG. 3 at the same time, since the bonding regions 21', 41' of the first electrode film 2' and the second electrode film 4' are in different planes, in order to use a flexible printed circuit (FPC) 6' fits on it (Fig. 3A), it must be applied by two processes and two sets of press fixtures 71', 72'; in detail, the first process must be pressed with the first set rule A flexible printed circuit (FPC) 6' is attached to the bonding area 21' of the first electrode film 2' (as shown in FIG. 3B), and the second process must be second. The press-fit jig 72' attaches a flexible printed circuit (FPC) 6' to the second electrode film 4' which is different from the bonding area 21' of the first electrode film 2'. On the junction 41' (as shown in Fig. 3C); resulting in increased process time and increased cost of the press fixture; in order to make the drawing clear, the optical glue 3' is not shown in Fig. 3.

In addition, referring to FIG. 4, when the thermocompression bonding is performed, the optical adhesive 3' between the first electrode film 2' and the second electrode film 4' is easily deformed due to pressure and temperature, thereby making the first The line 8' of the electrode film 2' and the second electrode film 4' is easily damaged.

Based on the above problems, the inventors have proposed a touch panel structure to overcome the drawbacks of the prior art.

The object of the present invention is to provide a method for hollowing out the bonding area of the first electrode film so that the bonding between the first electrode film and the second electrode film is on the same plane, thereby shortening the original two bonding processes into one process. A touch panel structure that shortens the tact time and saves on the cost of the jig.

In order to achieve the above object, the present invention provides a touch panel including: a first electrode film having a first bonding area, the first bonding area is provided with a hollowed out portion; a second electrode film, the second electrode film is disposed on the first electrode film, the second electrode film has a second bonding area, and the second bonding area is correspondingly dug The empty space has a filling area such that the first bonding area and the second bonding area are in the same plane.

The present invention further provides a touch display device comprising: a touch panel as described above; and a display panel disposed under the first electrode film.

While the invention has been described in terms of several preferred embodiments, the preferred embodiments of the present invention It is not intended that the invention be limited to the following drawings and embodiments.

Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a cross-sectional view showing the touch panel of the present invention, and FIG. 6 is an exploded perspective view showing the touch panel of the present invention.

The touch panel 1 of the present invention includes a first electrode film 2 and a second electrode film 4.

The first electrode film 2 and the second electrode film 4 are respectively required to be cut out from a large number of film sheets, but are not limited thereto.

A first electrode film 2 has a first bonding area 21, and the first bonding area 21 can be provided with a hollowed out portion 22.

A second electrode film 4 is disposed on the first electrode film 2, the second electrode film 4 has a second bonding region 41, and the second bonding region 41 has a filling region 42 corresponding to the hollowed portion 22, and the filling region The 42-layer is in the same plane as the first electrode film 2, and the first bonding region 21 and the second bonding region 41 are positioned on the same plane.

A first electrode film 2 and a second electrode film 4 may be disposed between The first optical adhesive (optical clear adhesive) 3, but not limited thereto.

The touch panel 1 of the present invention may further include a flexible printed circuit 6 that is electrically connected to the first bonding region 21 and the second electrode film 4 of the first electrode film 2 in a flat manner. The second bonding area 41 is on the padding area 42.

Referring to FIG. 7 again, it is a schematic diagram of the touch panel of the present invention during the bonding process. In the touch panel 1 of the present invention, the padding region 42 of the second bonding region 41 of the second electrode film 4 is located on the first bonding region 21 of the first electrode film 2 in comparison with the process of the prior art. Since the flexible printed circuit board 6 is bonded to the first bonding area 21 and the second bonding area 41, the bonding process can be performed using only a single pressing jig 7 to relatively save the same. The cost of pressing the fixtures also requires only one process time, which saves overall production time.

Please refer to FIG. 8 , which is a schematic diagram of the touch display device of the present invention.

The touch display device 20 of the present invention includes a touch panel 1 and a display panel 9 disposed under the touch panel. The display panel 9 can be a liquid crystal display panel or an organic light emitting diode display panel.

A second optical adhesive 5 is disposed on the touch panel 1 of the touch display device 20, but is not limited thereto. The second optical adhesive corresponds to the first bonding area and the second bonding area. A second optical glue is provided for the hollowing out.

A cover 10 is further disposed above the second optical adhesive 5 of the touch display device 20.

Although the present invention has been explained in connection with the preferred embodiments, it is not intended to limit the invention. It should be noted that those skilled in the art Many other similar embodiments can be constructed in accordance with the teachings of the present invention, which are all within the scope of the present invention.

[this invention]

1‧‧‧Film type capacitive touch panel structure

2‧‧‧First electrode film

21‧‧‧First bonding area

22‧‧‧Knockout

3‧‧‧First optical adhesive

4‧‧‧Second electrode film

41‧‧‧Second fitting area

42‧‧‧ Filling the area

5‧‧‧Second optical adhesive

6‧‧‧Flexible printed circuit boards

7‧‧‧ Pressing fixture

20‧‧‧Touch display device

9‧‧‧ display panel

10‧‧‧ Cover

[知知]

1'‧‧‧Film type capacitive touch panel structure

2'‧‧‧First electrode film

21’‧‧‧Meeting area

3'‧‧‧Optical adhesive

4'‧‧‧Second electrode film

41’‧‧‧Meeting area

6'‧‧‧Flexible printed circuit boards

71’‧‧‧First set of fixtures

72’‧‧‧Second set of fixtures

8’‧‧‧ lines

1 is a cross-sectional view showing the structure of a conventional film type capacitive touch panel.

2 is an exploded perspective view showing the structure of a conventional film type capacitive touch panel.

3A is a schematic view showing a conventional film type capacitive touch panel structure bonded to a flexible printed circuit board.

FIG. 3B is a schematic view showing a first film bonding process of a conventional film type capacitive touch panel structure with a first set of pressing jigs. FIG.

3C is a schematic view showing a second film bonding process of a conventional film type capacitive touch panel structure with a second set of pressing jigs.

FIG. 4A is a schematic view showing a conventional film type capacitive touch panel structure before being subjected to a bonding process by a press jig. FIG.

FIG. 4B is a schematic view showing a conventional film type capacitive touch panel structure with a press-fit jig for a bonding process.

Figure 5 is a cross-sectional view showing the touch panel of the present invention.

Fig. 6 is an exploded perspective view showing the touch panel of the present invention.

FIG. 7 is a schematic view showing the touch panel of the present invention in a bonding process.

Fig. 8 is a schematic view showing the touch display device of the present invention.

1‧‧‧ touch panel

2‧‧‧First electrode film

21‧‧‧First bonding area

22‧‧‧Knockout

4‧‧‧Second electrode film

41‧‧‧Second fitting area

42‧‧‧ Filling the area

6‧‧‧Flexible printed circuit boards

Claims (10)

A touch panel includes: a first electrode film having a first bonding area, the first bonding area is provided with a hollowed out portion; a second electrode film, the second electrode film is disposed On the first electrode film, the second electrode film has a second bonding area, and the second bonding area has a filling area corresponding to the hollowed out area, so that the first bonding area and the second bonding area The regions are located on the same plane; and a first optical glue is disposed between the first electrode film and the second electrode film. The touch panel of claim 1, wherein the first optical adhesive is disposed with a first optical glue cutout corresponding to the first bonding area and the second bonding area. The touch panel of claim 1, further comprising a flexible printed circuit board electrically connected to the first bonding area and the second bonding area on the same plane. A touch display device includes: the touch panel according to claim 1; and a display panel disposed under the touch panel. The touch display device according to claim 4, wherein the display panel is a liquid crystal display panel or an organic light emitting diode display panel. The touch display device of claim 4, wherein the first optical adhesive corresponds to the first bonding area and the second bonding area A first optical glue is provided for the hollowing out. The touch display device of claim 4, further comprising a flexible printed circuit board electrically connected to the first bonding area and the second bonding area on the same plane. The touch display device of claim 4, wherein the second electrode film is further provided with a second optical glue. The touch display device of claim 8, wherein the second optical adhesive is provided with a second optical glue cutout corresponding to the first bonding area and the second bonding area. The touch display device of claim 8, wherein a cover plate is further disposed on the second optical adhesive.