KR200236087Y1 - Touch panel assembly - Google Patents

Abstract

According to the present invention, there is provided a substrate comprising: a substrate having first and second electrodes parallel to each other and a transparent conductive film formed on an upper surface thereof; An upper plate disposed on the substrate and disposed at right angles to the first and second electrodes and having parallel third and fourth electrodes and a transparent conductive film formed on a lower surface thereof; A spacer disposed between the substrate and the top plate; A flexible printed cable having cable terminal parts electrically connected to the terminal parts of the first to fourth electrodes, the touch panel device comprising: a terminal part of the electrodes having a shape divided into three branch parts, and the flexible print A touch panel device is provided, wherein the terminal portions of the tide cable also have a shape divided into three branch portions to coincide with the terminal portions of the electrodes.

Description

Touch panel assembly {Touch panel assembly}

The present invention relates to a touch panel device, and more particularly, to a touch panel device with improved terminal bonding between a substrate of a touch panel and a flexible printed cable.

In general, the touch panel device is used as an input device such as a computer, and is a device in which information corresponding to a position where a user applies pressure to the surface of the touch panel with a finger is input. For example, a touch panel device is mounted on the surface of a monitor provided in a bank automated teller machine. The user may input information by applying pressure to a predetermined position of the touch panel device according to the guidance displayed on the monitor, whereby the automatic teller machine can perform a predetermined operation.

1 is a schematic exploded perspective view of a conventional touch panel device.

Referring to the drawings, the touch panel device includes a substrate 11 having electrodes formed thereon, an upper plate 12 disposed on the substrate 11 and having electrodes formed thereon, and a flexible printed cable connecting the electrodes to an external circuit. 13). Typically, the substrate 11 is formed of a glass material, while the top plate 12 is formed of a film material and thus has flexibility. An X1 electrode 16 and an X2 electrode 19 formed in parallel with each other are formed on the substrate 11. On the other hand, on the lower surface of the upper plate 12, Y1 electrode 14 and Y2 electrode 15 formed in parallel with each other are formed. The X1 electrode 16 is electrically connected to the terminal at the position 20 by extension 17. Although not shown in the figure, a transparent conductive film in the form of a strip is formed on the upper surface of the substrate 11 and the lower surface of the upper plate 12 over the entire surface, which is connected to each electrode, respectively.

The upper plate 12 and the substrate 11 are bonded to each other, and a spacer (not shown) is interposed between the upper plate 12 and the substrate 11 to maintain a state in which the transparent conductive films are not in contact with each other. In addition, the electrodes 14 and 15 of the upper plate 12 are respectively connected to the junction 20 of the flexible printed cable 13 when the upper plate 12 and the substrate 11 are bonded to each other. Similarly, the electrodes of the substrate 11 are also connected to the flexible printed cable 13 at each junction terminal 20. The flexible printed cable 13 is bonded to the electrode terminal on the substrate 11 by an anisotropic conductive adhesive.

When the user applies the pressure to the upper plate 12 with a finger, the touch panel configured as described above is brought into a conductive state by contacting the transparent conductive film formed on the upper plate 12 and the transparent conductive film formed on the substrate 11 to each other. It is to measure the change of the current according to the resistance value so that a predetermined signal is input.

2 shows the flexible printed cable 13 of the touch panel device shown in FIG. 1 in a separated state, in which the substrate and the top plate are shown bonded to each other.

Referring to the drawings, the terminal portions 21 formed at the ends of the electrodes 14, 15, 16, and 17 formed on the substrate 11 and the upper plate 12 are close to each other at one central position of the substrate 11. Is arranged to. For example, denoted by reference numeral 21 is a terminal portion of the electrode 14, which is formed close to the terminal portion of the other electrodes. The flexible printed cable 13 is formed with a cable terminal portion 22 corresponding to the terminal portion of the respective electrodes. The reference numeral 23 denotes a lead extending from the cable terminal portion 22.

The bonding method of the electrode terminal portion 21 and the cable terminal portion 22 as described above has the following problems. First, since the area where the electrode terminal portion 21 and the cable terminal portion 22 are in contact with each other is very small, the adhesive force is weak. This is because when the area of the electrode terminal portion 21 and the cable terminal portion 22 increases, the resistance increases accordingly, and therefore, there is a problem in that the area of the terminal portion cannot be increased in order to increase the adhesive force. In addition, there is a problem that the bonding is not easy because there is no separate means for accurately matching the mutual position of the terminal portions (21, 22) at the time of bonding.

The present invention has been made to solve the above problems, an object of the present invention is to provide a touch panel device with improved adhesion between the electrode terminal portion on the substrate and the terminal portion of the flexible printed cable.

Another object of the present invention is to provide a touch panel device capable of easily performing adhesion between an electrode terminal portion and a flexible printed cable terminal portion.

1 is a schematic perspective view of a conventional touch panel device.

FIG. 2 is an exploded perspective view illustrating the bonding state of the electrode terminal portion on the substrate illustrated in FIG. 1 and the terminal portion of the flexible printed cable.

3 is an exploded perspective view illustrating an enlarged state of bonding between an electrode terminal portion on a substrate and a terminal portion of a flexible printed cable in the touch panel device according to the present invention.

<Brief Description of Major Codes in Drawings>

11.Board 12.Top Plate

13. Flexible printed cable 14. Y1 electrode

15.Y2 electrode 16.X1 electrode

17. Extension

19.X2 electrode 20. Junction

31.substrate 34.electrode terminal

35. Dummy terminal part 36. Cable terminal part

In order to achieve the above object, according to the present invention, the first and second electrodes parallel to each other and the transparent conductive film formed on the upper surface; An upper plate disposed on the substrate and disposed at right angles to the first and second electrodes and having parallel third and fourth electrodes and a transparent conductive film formed on a lower surface thereof; A spacer disposed between the substrate and the top plate; A flexible printed cable having cable terminal parts electrically connected to the terminal parts of the first to fourth electrodes, the touch panel device comprising: a terminal part of the electrodes having a shape divided into three branch parts, and the flexible print A touch panel device is provided, wherein the terminal portions of the tide cable also have a shape divided into three branch portions to coincide with the terminal portions of the electrodes.

According to another feature of the present invention, a dummy terminal portion is further formed between the terminal portions of the electrodes formed on the substrate and at both edges thereof, and between the terminal portions of the flexible printed cable and at both edges of the flexible printed cable. The dummy terminal portion is further formed.

According to another feature of the present invention, each of the three branch portions formed in the electrode terminal portion and the cable terminal portion, each of the width of the dummy terminal portion, the spacing formed between the respective branch portions, the dummy terminal portion close to the branch portion The intervals between them coincide with each other.

Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in the accompanying drawings.

The overall configuration of the touch panel device according to the present invention is similar to that of the conventional touch panel device shown in FIG. 1. That is, as described with reference to FIG. 1, the touch panel device includes a substrate 11 having parallel electrodes formed thereon, an upper plate 12 disposed on the substrate 11 and having electrodes formed thereon, and the electrodes A flexible printed cable 13 is connected to the circuit. An X1 electrode 16 and an X2 electrode 19 formed in parallel with each other are formed on the substrate 11. On the other hand, on the lower surface of the upper plate 12, Y1 electrode 14 and Y2 electrode 15 formed in parallel with each other are formed. Although not shown in the drawings, a strip-shaped transparent conductive film connected to each electrode is formed on the upper surface of the substrate 11 and the lower surface of the upper plate 12.

The upper plate 12 and the substrate 11 are bonded to each other, and a spacer (not shown) is interposed between the upper plate 12 and the substrate 11 to maintain a state in which the transparent conductive films are not in contact with each other. The flexible printed cable 13 is bonded to the electrode terminals on the substrate 11 with an anisotropic conductive adhesive for each electrode terminal at the junction 20.

3 is a schematic enlarged perspective view of a portion corresponding to the junction 20 in FIG. 1.

Referring to the drawings, electrode terminals 34 according to the features of the present invention are formed at the ends of the electrodes formed on the surface of the substrate 31. As shown in the figure, each electrode terminal portion 34 has the shape of the letter E letter whose end portion is divided into three branch portions. Three branch portions of the electrode terminal portion 34 terminate at the edges of the substrate 31. In addition, a dummy terminal portion 35 is formed between each electrode terminal portion 34. It is preferable that the width of each branch portion of the electrode terminal portion 34 is within 0.5 mm, and the width of the dummy terminal portion 35 is also within 0.5 mm. In addition, it is preferable that the interval between one branch of the electrode terminal portion 34 and the dummy terminal portion 35 is also within 0.5 mm.

Meanwhile, a cable terminal portion 36 having a shape corresponding to the electrode terminal portion 34 is formed on the surface of the flexible printed cable 33 to be bonded to the electrode terminal portion 34. The cable terminal portion 36 also has the shape of the letter E letter divided into three branches in the same shape as the electrode terminal portion 34. In addition, dummy terminal portions 37 are formed between the cable terminal portions 36 and at both edges, which are bonded in correspondence with the dummy terminal portions 35 on the substrate 31 at the time of bonding. The width of the branch portion and the width of the dummy terminal portion 37 of the cable terminal portion 36 formed on the flexible printed cable 33 correspond to the width of the branch portion of the electrode terminal portion 34 and the width of the dummy terminal portion 35, respectively. Is formed. Reference numeral 39 is a lead extending from the terminal portion 36.

When the flexible printed cable 33 is bonded to the substrate 31, the respective cable terminal portions 36 and the electrode terminal portions 34 correspond to each other, and the dummy terminal portions 35 and 37 also bond to each other. do. The adhesive used for bonding is a conventional anisotropic conductive adhesive.

The shape of the electrode terminal portion 34 and the cable terminal portion 36 makes it possible to improve the adhesive force between the terminal portions. That is, by forming the same area of the terminal portions 34 and 36, the resistance can be made the same, and at the same time, the adhesive force can be increased by expanding the bonding area. In addition, the dummy terminal portions 35 and 37 serve as marking portions that can exactly match the bonding positions.

Touch panel device according to the present invention has the advantage that the adhesive force is improved by increasing the adhesive area of the flexible printed cable to the substrate. Therefore, even if an external force is applied to the flexible printed cable at the time of assembling the touch panel device, this does not easily fall, and the reliability of the assembly can be ensured.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. There will be. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

A substrate having first and second electrodes parallel to each other and a transparent conductive film formed on an upper surface thereof; An upper plate disposed on the substrate and disposed at right angles to the first and second electrodes and having parallel third and fourth electrodes and a transparent conductive film formed on a lower surface thereof; A spacer disposed between the substrate and the top plate; 12. A touch panel device comprising: a flexible printed cable having cable terminal parts electrically connected to terminal parts of the first to fourth electrodes. And a terminal portion of the electrodes having a shape divided into three branch portions, and terminal portions of the flexible printed cable also have a shape divided into three branch portions to coincide with the terminal portion of the electrodes. The dummy terminal portion of claim 1, further comprising dummy terminal portions formed between the terminal portions of the electrodes formed on the substrate and at both edges thereof, and between the terminal portions of the flexible printed cable and at both edges thereof. Touch panel device, characterized in that further formed. 3. The width of each of the three branch portions formed in the electrode terminal portion and the cable terminal portion, the width of each of the dummy terminal portions, the spacing formed between the branch portions, and the branch portion close to each other. The gap between the dummy terminal portions coincides with each other.