TWM453194U - Capacitive touch panel - Google Patents

Description

Capacitive touch panel

This creation is about a capacitive touch panel, especially a capacitive touch panel that improves yield.

The main structure of the conventional capacitive touch panel is as shown in FIG. 7 , which is mainly formed on a substrate 60 to form a plurality of staggered first axis sensing lines 70 and a plurality of second axis sensing lines 80, and a plurality of metal connecting lines. The first and second axis sensing lines 70 and 80 are respectively connected to the first and second axis sensing lines 70 and 80. Since the first axis sensing line 70 and the second axis sensing line 80 are electrically insulated from each other, the first and second axis sensing lines 70 and 80 are connected. A crossover structure must be formed at each of the interlaces, as further explained below.

Referring to FIG. 8 , in the capacitive touch panel, the plurality of first axis sensing lines 70 are arranged side by side, and each of the first axis sensing lines 70 is formed with a plurality of insulating layers 701; each of the second axis sensing lines 80 The sensing unit 81 includes a plurality of sensing units 81 arranged at a plurality of intervals, and the plurality of sensing units 81 of the second axis sensing lines 80 are formed on the substrate 60 and arranged between the adjacent first axis sensing lines 70 and the insulating layer 701. As shown in FIGS. 9 and 10, two adjacent sensing units 81 are connected to a connecting portion 82, and the connecting portion 82 spans the corresponding insulating layer 701 on the first shaft sensing line 70, so that the plurality of sensing units 81 A second axis sensing line 80 is formed.

Due to the first and second axis sensing lines 70 and 80 of the capacitive touch panel The material of the edge layer 701 and the like must be made of a transparent material. In the prior art, the material of the first axis sensing line 70 is usually made of indium tin oxide (ITO). In the second axis sensing line 80, the material of the plurality of sensing units 81 is the same. It is indium tin oxide, but the material of the connecting section 82 connected to the induction unit is made of molybdenum-aluminum-molybdenum alloy; since the mixed coefficient of the mixed metal of the molybdenum-aluminum-molybdenum alloy is large, the connecting section 82 is easily broken by thermal expansion, and as shown in the figure As shown in FIG. 7, as long as a single connecting section 82 is broken in each of the second axis sensing lines 80, the effect is not only that the single sensing unit 81 fails, but the sensing units 81 or even the entire second axis are induced. The inductance of line 80 is invalid, and its influence is very large. However, according to the fault condition of the existing capacitive touch surface, the induction failure due to the fracture of the connecting section 82 is not rare; furthermore, the resistivity of the molybdenum-aluminum-molybdenum alloy is relatively small. If the number of sensing units 81 in the second axis sensing line 80 is excessively increased, the sensing sensitivity is greatly reduced, and the size of the capacitive touch panel is limited, which is not suitable for a larger electronic device. , This must be improved.

In addition, the shape of the first axis sensing line 70 is generally the same as that of the second axis sensing line 80. It also includes a plurality of sensing units 71 arranged at intervals and connected between two adjacent sensing units 71. The segment 72 is connected, and the insulating layer 701 is formed on the connecting portion 72 as shown in FIG. 9; since the connecting portion 72 is not used for touch sensing, but the sensing unit 71 is connected, the connecting portion 72 is mostly elongated. Therefore, the bonding area with the substrate 60 is relatively small, and it is easy to be detached from the substrate 60, and the breakage is likely to occur after the detachment, and the plurality of sensing units 71 or even the entire first axis sensing line in the first axis sensing line 70 are also caused. The problem of 70-sensing failure must also be improved.

In view of the technical defects that the capacitive touch panel is susceptible to failure of a plurality of sensing units or even the entire second axis sensing line due to breakage of a single connecting section in the second axis sensing line, the main purpose of the present invention is to propose a capacitive type. Touch panel.

The main technical means for achieving the above purpose is that the capacitive touch panel comprises: a substrate; a plurality of first axis sensing lines are formed side by side on the surface of the substrate, and the first axis sensing lines are formed. a plurality of insulating layers; a plurality of second axis sensing lines, each of the second axis sensing lines includes a sensing unit arranged at a plurality of intervals, and a plurality of sensing units of the second axis sensing lines are formed on a surface of the substrate corresponding to the first axis sensing line And correspondingly arranged between two adjacent first axis sensing lines corresponding to the insulating layer, and two adjacent sensing units are connected with a plurality of connecting segments, and the plurality of connecting segments cross the corresponding line on the first axis sensing line The insulating layer causes the plurality of sensing units to form a second axis sensing line.

Since the second axis sensing line of the capacitive touch panel is connected to the sensing unit by a plurality of connecting segments, if one of the connecting segments breaks due to expansion, another connecting segment can maintain the electrical connection between the sensing units. To avoid the failure of several sensing units or the entire second axis sensing line due to the breakage of a single connecting section, and reduce the failure rate of the use; furthermore, increase the number of connecting sections connected between the sensing units to form a parallel equivalent resistance. Reducing the impedance value between adjacent sensing units helps to improve the sensing sensitivity of the second axis sensing line, and reduces the size of the capacitive touch panel due to the large resistivity of the material.

Referring to FIG. 1 and FIG. 2 , the capacitive touch panel of the present invention comprises: a substrate 10; a plurality of first axis sensing lines 20 are formed on the surface of the substrate 10 in parallel, and each of the first axis sensing lines 20 A plurality of insulating layers 201 are formed. In this embodiment, each of the first axis sensing lines 20 includes a sensing unit 21 arranged at a plurality of intervals and a connecting portion 22 connected between the adjacent sensing units 21, and the plurality of sensing units 21 The material of the plurality of connecting segments 22 is indium tin oxide, which can be printed on the surface of the substrate 10. The plurality of insulating layers 201 are respectively formed on the plurality of connecting segments 22 corresponding to the first axis sensing lines 20, and FIG. 3 As shown, the insulating layer 201 covers the surface of the substrate 10 corresponding to the periphery of the connecting portion 22 to cover the corresponding connecting portion 22; the plurality of second axis sensing lines 30, and each of the second axis sensing lines 30 includes a sensing unit 31 arranged at a plurality of intervals. The plurality of sensing units 31 of the second axis sensing lines 30 are formed on the surface of the substrate 10 corresponding to the first axis sensing line 20, and are correspondingly arranged between the two adjacent first axis sensing lines 20 corresponding to the insulating layer 201. Two adjacent sensing units 31 A plurality of connecting sections 32 are connected, and the plurality of connecting sections 32 are connected to the corresponding insulating layer 201 on the first axis sensing line 20 as shown in FIGS. 3 and 4, so that the complex sensing unit 31 constitutes the second axis sensing line 30. In this embodiment, the second axis sensing line 30 further forms a protective layer 33 on the plurality of connecting segments 32 between the two adjacent sensing units 31, and the protective layer 33 covers the corresponding plurality of connecting segments 32 to protect The connecting section 32 further prevents the connecting section 32 from breaking.

The substrate 10 corresponds to the surface of the first and second axis sensing lines 20, 30. Further, a plurality of metal wires 40 are formed, and the plurality of metal wires 40 are connected to the plurality of first and second axis sensing wires 20, 30, respectively.

The sensing unit 21 of the first axis sensing line 20, the connecting section 22 and the sensing unit 31 of the second axis sensing line 30 and the connecting section 32 are made of a conductive material.

The plurality of connecting segments 32 connected between the sensing units 31 may be vertically juxtaposed, diagonally juxtaposed, and meshed, wherein the straight juxtaposition is as shown in FIG. 2, and the plurality of connecting segments 32 are juxtaposed, and The connecting sections 32 are arranged in parallel with the axial direction corresponding to the second axis sensing line 30; the oblique juxtaposition is as shown in FIG. 5, the plurality of connecting sections 32 are juxtaposed, and the connecting sections 32 are aligned with the second axis sensing line. The corresponding axial direction of 30 constitutes an angle of less than 90 degrees; the mesh arrangement is as shown in FIG. 6, the plurality of connecting sections 32 are juxtaposed, and the connecting direction of each connecting section 32 is parallel to the axial direction corresponding to the second axis sensing line 30. And the plurality of juxtaposed connecting segments 32 are connected by a plurality of oblique connecting segments 321 . Such a mesh structure can strengthen the structural strength of the connecting segments 32 and further prevent the connecting segments 32 from being broken.

The connecting portion 32 can be printed or soldered to cover the corresponding sensing unit 31 and the insulating layer 201.

The second axis sensing line 20 of the capacitive touch panel is connected to the sensing unit 31 by a plurality of connecting segments 32. When one of the connecting segments 32 is broken between any of the sensing units 31, other connecting segments 32 can remain inductive. The electrical connection relationship between the units 31 does not cause the problem of induction failure; furthermore, after the plurality of connection sections 32 constitute a mesh structure, the structural strength of the connection section 32 can be increased, so that the probability of the connection section 32 being broken is reduced. Further preventing the breakage of the connecting section 32 to cause induction effect; in addition, in addition to The connecting section 32 is connected to the sensing unit 31 to form a parallel equivalent resistance, which reduces the impedance value between the sensing units 31, and reduces the impedance value between the sensing units 31 to increase the sensing sensitivity of the second axis sensing line 20, The effect of the high resistance value of the connecting section on the length limitation of the second axis sensing line 20 is also reduced, so that the size of the capacitive touch panel can be further increased to be suitable for a larger-sized electronic device; The wire 20, the present invention in turn covers the connecting portion 22 of the first axis sensing line 20 with the insulating layer 201. Since the bonding force between the insulating layer 201 and the substrate 10 is higher than the bonding force of the connecting portion 21 and the substrate 10, The connecting portion 22 can be easily detached from the surface of the substrate 10 by the coating of the insulating layer 201, and has the effect of protecting the connecting portion 22 from unintentional breakage, and can also ensure the sensing capability of the first shaft sensing line 20.

In summary, the capacitive touch panel of the present invention can effectively reduce the occurrence of inductive failure of the first and second-axis sensing lines due to the breakage of the connecting section, reduce the use failure rate, and further improve the sensitivity and help increase the touch. The effect of the panel size.

10‧‧‧Substrate

20‧‧‧First axis induction line

201‧‧‧Insulation

21‧‧‧Sensor unit

22‧‧‧ Connection section

30‧‧‧Second axis induction line

31‧‧‧Sensor unit

32‧‧‧ Connection section

321‧‧‧ oblique connecting section

33‧‧‧Protective layer

40‧‧‧Metal wire

60‧‧‧Substrate

70‧‧‧First axis induction line

701‧‧‧Insulation

71‧‧‧Sensor unit

72‧‧‧ Connection section

80‧‧‧Second axis induction line

81‧‧‧Sensor unit

82‧‧‧ Connection section

90‧‧‧Metal wire

FIG. 1 is a schematic plan view of a preferred embodiment of the capacitive touch panel of the present invention before the protective layer is covered.

Figure 2 is a partial enlarged view of Figure 1.

Fig. 3 is a schematic cross-sectional view showing a cut line after the protective layer is applied to Fig. 2.

Figure 4 is a cross-sectional view showing another cut line after the protective layer is applied to Figure 2.

Figure 5 is a partially enlarged plan view of another preferred embodiment of the present invention before the protective layer has been applied.

Figure 6: A further preferred embodiment of the present invention before the protective layer has been overwritten Partially enlarged plan view.

FIG. 7 is a schematic plan view of a conventional capacitive touch panel.

Figure 8 is a partial enlarged view of Figure 7.

Figure 9 is a cross-sectional view of the cut line of Figure 7.

Figure 10 is a cross-sectional view showing another cut line of Figure 7.

10‧‧‧Substrate

20‧‧‧First axis induction line

21‧‧‧Sensor unit

30‧‧‧Second axis induction line

31‧‧‧Sensor unit

32‧‧‧ Connection section

40‧‧‧Metal wire

Claims (10)

A capacitive touch panel includes: a substrate; a plurality of first axis sensing lines are formed side by side on the surface of the substrate, and each of the first axis sensing lines is formed with a plurality of insulating layers; the plurality of second axis sensing The second axis sensing line includes a plurality of sensing units arranged at a plurality of intervals, and the plurality of sensing units of the second axis sensing lines are formed on a surface of the substrate corresponding to the first axis sensing line, and are correspondingly arranged on two adjacent ones. The first axis sensing line corresponds to the insulating layer, and two adjacent sensing units are connected with a plurality of connecting segments, and the plurality of connecting segments cross the corresponding insulating layer on the first axis sensing line, so that the plurality of sensing units form a second Axis induction line. The capacitive touch panel of claim 1, wherein each of the second axis sensing lines is connected in parallel with the plurality of connecting segments of the adjacent sensing units, and each connecting segment is arranged in an axis corresponding to the second axis sensing line. Parallel. The capacitive touch panel of claim 1, wherein each of the second axis sensing lines is connected in parallel with the plurality of connecting segments of the adjacent sensing units, and each connecting segment is arranged in an axis corresponding to the second axis sensing line. The intervening direction forms an angle less than the degree. The capacitive touch panel of claim 1, wherein each of the second axis sensing lines is connected in parallel with the plurality of connecting segments of the adjacent sensing units, and each connecting segment is arranged in an axis corresponding to the second axis sensing line. Parallel, parallel and connected segments are connected by a plurality of oblique connecting segments. The capacitive touch panel of any one of claims 1 to 4, wherein each of the first axis sensing lines includes a plurality of sensing units arranged at a plurality of intervals and a plurality of connecting segments connected between the adjacent sensing units, the plurality Insulation layer And forming a plurality of connecting segments corresponding to the first axis sensing lines, and the insulating layer covers the surface of the substrate corresponding to the periphery of the connecting portion to cover the corresponding connecting segments. The capacitive touch panel according to any one of claims 1 to 4, wherein the second axis sensing line further forms a protective layer on the plurality of connecting segments between the two adjacent sensing units, and the protective layer is coated correspondingly Multiple connection segments. The capacitive touch panel of claim 5, wherein the second axis sensing line further forms a protective layer on the plurality of connecting segments between the two adjacent sensing units, and the protective layer covers the corresponding plurality of connecting segments. The capacitive touch panel of any one of claims 1 to 4, wherein the substrate further forms a plurality of metal lines corresponding to the surfaces of the first and second axis sensing lines, and the plurality of metal lines are respectively connected to the plurality of first lines. Two-axis induction line. The capacitive touch panel of claim 5, wherein the substrate further forms a plurality of metal lines corresponding to the surfaces of the first and second axis sensing lines, and the plurality of metal lines are respectively connected to the plurality of first and second axis sensing lines. The capacitive touch panel of claim 6, wherein the substrate further forms a plurality of metal lines corresponding to the surfaces of the first and second axis sensing lines, and the plurality of metal lines are respectively connected to the plurality of first and second axis sensing lines.