TW201638757A - Touch panels - Google Patents

Abstract

The disclosure provides a touch panel. The touch panel includes a plurality of axial sensing electrodes parallel to each other and disposed in a touch area. The touch panel also includes a plurality of bonding pads disposed at one side of the touch area. The touch panel further includes a plurality of traces electrically connecting the axial sensing electrodes to the bonding pads respectively. The traces have the same ratio of a length to a cross-sectional area in each trace.

Description

Touch panel

The invention relates to touch technology, in particular to the wire design of the sensing electrodes of the touch panel.

In recent years, touch panels have been widely used in various electronic products, such as mobile phones, portable computers, and palm-sized computers. Touch panels are often combined with display panels to become input/output interfaces for electronic products.

The touch panel usually includes a plurality of sensing electrodes arranged in a touch array to provide a touch sensing function, and the touch panel further includes a plurality of wires electrically connecting the sensing electrodes to the bonding pads, the bonding pads and the flexible The printed circuit board is bonded, whereby the electrical signal obtained by the sensing electrode is transmitted to the integrated circuit on the flexible printed circuit board to determine the touch signal.

However, the wires electrically connecting the sensing electrodes at different positions in the touch array to the bonding pads usually have different lengths, and the wires having different lengths cause the electrical signals to be transmitted on the respective wires to have different degrees of attenuation. The remote touch of the touch panel is not sensitive.

In view of the above problems in the prior art, the present invention reduces the ratio of the length of each of the wires of the sensing electrode of the touch panel to the upper cross-sectional area for the longer length of the wire connected to the distal sensing electrode. Electrical signal The attenuation of the signal on the transmission improves the sensitivity of the touch of the remote area of the touch panel, so that the electrical signals of the distal and proximal sensing electrodes are transmitted on the wires of different lengths with the same degree of attenuation to ensure the touch panel. The consistency of signal transmission reduces the probability of reporting errors and improves the overall sensitivity of the touch panel.

According to some embodiments of the present disclosure, a touch panel is provided, The method includes: a plurality of axial sensing electrodes arranged in parallel in the touch area; a plurality of bonding pads disposed on one side of the touch area; and a plurality of wires electrically connecting the axial sensing electrodes to the bonding Pad, wherein the wires have the same ratio of length to upper cross-sectional area.

In some embodiments, the height of the cross-sectional area of each wire Again, and these wires have a ratio of the same length to the width of the upper cross-sectional area.

In some embodiments, the width of the cross-sectional area of each of the wires Again, and these wires have a ratio of the same length to the height of the upper cross-sectional area.

According to some embodiments of the present disclosure, a touch surface is also provided The board includes: a plurality of first axial sensing electrodes arranged in parallel in the touch area; a plurality of second axial sensing electrodes interlaced with the first axial sensing electrodes, and arranged in parallel in the touch a plurality of bonding pads disposed on one side of the touch area; a plurality of first wires electrically connecting the first axial sensing electrodes to the bonding pads, wherein the first wires have the same length ratio a first ratio of the upper cross-sectional area; and a plurality of second wires electrically connecting the second axial sensing electrodes to the bonding pads, wherein the second wires have a second ratio of the same length to the upper cross-sectional area.

100‧‧‧ touch panel

100A‧‧‧ touch area

100B‧‧‧ wiring area

101‧‧‧Substrate

110‧‧‧First axial sensing electrode

110U‧‧‧first electrode unit

112-1, 112-2, 112-3, 112-4‧‧‧ first conductor

120‧‧‧Second axial sensing electrode

120U‧‧‧second electrode unit

122-1, 122-2, 122-3, 122-4, 122-5‧‧‧ second conductor

130‧‧‧Material pads

140, 150‧‧‧Axial sensing electrodes

142-1, 142-2, 142-3, 142-4, 152-1, 152-2, 152-3, 152-4‧‧‧ wires

W1, W2, W3, W4, W5, W', W-1, W-2, W-3, W-4‧‧‧ width of the second wire

H1, H2, H3, H4, H5, H-1, H-2, H-3, H-4‧‧‧ height of the second wire

Cross-sectional area of the second wire of S1, S2, S3, S4‧‧

W6, W7, W8, W9, W", W-5, W-6, W-7‧‧‧ width of the first wire

H6, H7, H8, H9, H-5, H-6, H-7‧‧‧ height of the first wire

S5, S6, S7‧‧‧ cross-sectional area of the first conductor

The above-mentioned objects, features, and advantages of the present invention will be apparent from the following description. FIG. 1 is a schematic plan view of a touch panel according to some embodiments of the present disclosure.

FIG. 2A is a plan view showing a wire of an axial electrode of the touch panel of FIG. 1 according to some embodiments of the present disclosure.

2B is a plan view of a wire of another axial electrode of the touch panel of FIG. 1 according to some embodiments of the present disclosure.

FIG. 3A is a cross-sectional view of a wire of an axial electrode of the touch panel of FIG. 1 according to some embodiments of the present disclosure.

FIG. 3B is a cross-sectional view of a wire of another axial electrode of the touch panel of FIG. 1 according to some embodiments of the present disclosure.

FIG. 4A is a schematic plan view showing a wire of an axial electrode of the touch panel of FIG. 1 according to some embodiments of the present disclosure.

4B through 4E are schematic cross-sectional views at various cross-sections of the wire of FIG. 4A, in accordance with some embodiments of the present disclosure.

FIG. 5A is a schematic plan view showing one of the other axial electrodes of the touch panel of FIG. 1 according to some embodiments of the present disclosure.

5B-5D are schematic views of cross-sectional areas at various cross-sections of the wire of FIG. 5A, in accordance with some embodiments of the present disclosure.

FIG. 6 is a schematic plan view of a touch panel according to some embodiments of the present disclosure.

FIG. 7 is a schematic plan view of a touch panel according to still other embodiments of the present disclosure.

Please refer to FIG. 1 , which is a schematic plan view of the touch panel 100 according to some embodiments of the present disclosure. In some embodiments, the touch panel 100 can be a capacitive touch panel including a plurality of first axial sensing electrodes 110, and the first axial sensing electrodes 110 extend, for example, along the Y-axis direction. An axial sensing electrode 110 is arranged in parallel with each other and disposed on the substrate 101 and located in the touch area 100A. Each of the first axial sensing electrodes 110 includes a plurality of first electrode units 110U, and the first electrode units 110U can be utilized. The connecting portions are connected in series to each other to form the first axial sensing electrode 110. As shown in FIG. 1 , the first axial sensing electrodes 110 are electrically connected to the individual bonding pads 130 via the first wires 112 - 1 , 112 - 2 , 11 - 2 , and 11 - 2 , respectively. It is disposed on the substrate 101 and located on one side of the touch area 110A, for example, on the lower side of the touch area 110A. In some embodiments, the first wires 112-1, 112-2, 112-3, 112-4 have different lengths, respectively, wherein the length of the first wire 112-1 is the shortest, and the first wire 112-4 The longest length.

In addition, the touch panel 100 further includes a plurality of second axial sensing electrodes 120 extending, for example, along the X-axis direction, and the second axial sensing electrodes 120 are arranged in parallel with each other, and The second axial sensing electrodes 120 are insulated from the first axial sensing electrodes 110 and disposed on the substrate 101 and located in the touch area 100A. Each of the second axial sensing electrodes 120 includes a plurality of second electrode units. 120U, these second electrode units 120U may be connected to each other in series to form a second axial sensing electrode 120, although not depicted in FIG. 1 , second The connecting portion between the connecting portion between the electrode unit 120U and the first electrode unit 110U can be electrically insulated from each other via an insulating block to avoid the second axial sensing electrode 120 and the first axial sensing electrode 110. A short circuit occurs at the intersection. As shown in FIG. 1 , the second axial sensing electrodes 120 are electrically connected to the individual bonding pads 130 via the second wires 122-1 , 122-2 , 122-3 , 122-4 , and 122-5 , respectively. In some embodiments, the second wires 122-1, 122-2, 122-3, 122-4, 122-5 have different lengths, wherein the second wire 122-1 has the longest length and the first wire The length of 122-5 is the shortest.

The first wires 112-1 to 112-4 and the second wires 122-1 to 122-5 are Formed by the same process, for example, by deposition of metal materials or transparent conductive materials, lithography, and etching processes, or may be formed via a printing process, in some embodiments, first wires 112-1 through 112-4 and The cross-sectional areas of the two wires 122-1 to 122-5 have the same height, but the widths of the cross-sectional areas of the wires are different; in other embodiments, the first wires 112-1 to 112-4 and the second wires 122- The cross-sectional areas of 1 to 122-5 have the same width, but the heights of the cross-sectional areas of the respective wires are different.

In the prior art, each wire of the touch panel is adopted. The cross-sectional area is designed to be equal in width and equal in height, however, the sensing electrodes connected to the bonding pads are different in length from the different wires connected to the sensing electrodes away from the bonding pads, according to the calculation formula of the resistance R=ρ L /S, wherein the resistivity ρ is fixed, and when the width and height of the cross-sectional area of each of the wires are the same, the cross-sectional area S is also equal, so the longer the length L, the larger the resistance R of the wire.

The signal transmission between the sensing electrode of the touch panel and the integrated circuit of the touch panel is transmitted through the wire by means of current, according to the formula of power W=V ² /R, due to the voltage applied to each sensing electrode V is fixed. When the resistances R of the wires are different, the power W of each wire is different. Therefore, when the height and width of the cross-sectional area of each wire are the same, the longer the length L, the larger the resistance R of the wire. The smaller the power W is obtained, that is, the greater the power consumption, the degree of transmission attenuation of the electrical signal on the wires connected to the sensing electrodes of the distal region compared to the wires of the sensing electrodes connected to the proximal region. Larger, which causes the touch of the distal end region of the conventional touch panel to be insensitive. The distal end region refers to a farther region of the axial sensing electrode of the touch panel than the bonding pad. The proximal end region refers to a region closer to the axial sensing electrode of the touch panel than the bonding pad.

According to the embodiments of the present disclosure, the above problems can be solved. Please refer to 2A is a second wire 122-1, 122-2, 122-3, 122 of the second axial sensing electrode 120 of the touch panel 100 of FIG. 1 according to some embodiments of the present disclosure. 4, plane diagram of 122-5. As shown in FIG. 2A, the second wires 122-1, 122-2, 122-3, 122-4, 122-5 have different lengths, for example, the second wires 122-1, 122-2, 122- 3, 122-4, 122-5 lengths can be L1, L2, L3, L4, L5, respectively, where L1>L2>L3>L4>L5, and the length of the second wire 122-1 to 122-5 is One terminal of the two-axis sensing electrode 120 starts to one end of the bonding pad 130. According to some embodiments of the present disclosure, the cross-sectional areas of the second wires 122-1, 122-2, 122-3, 122-4, 122-5 have different widths and the same height H, for example, the second wire 122- 1. The widths of the cross-sectional areas of 122-2, 122-3, 122-4, and 122-5 may be W1, W2, W3, W4, and W5, respectively, where W1>W2>W3>W4>W5, and the second wire 122 The width of -1 to 122-5 is the vertical distance between the two long sides of the wire.

According to an embodiment of the present disclosure, the second wires 122-1, Each of the wires 122-2, 122-3, 122-4, 122-5 has the same ratio of length to upper cross-sectional area. According to the calculation formula of the resistance R = ρ L / S, wherein the resistivity ρ is fixed, the cross-sectional area S = width W * height H, that is, R = ρ L / W * H. In some embodiments, the height H of the cross-sectional area S of each of the second wires 122-1, 122-2, 122-3, 122-4, 122-5 is the same, when each of the second wires 122-1, 122 When the ratio of the lengths of -2, 122-3, 122-4, and 122-5 is equal to the ratio of the upper sectional area, each of the second wires 122-1, 122-2, 122-3, 122-4, and 122-5 The ratio of the length to the width of the upper sectional area is also equal, that is, in this embodiment, L1/W1=L2/W2=L3/W3=L4/W4=L5/W5 such that each of the second wires 122-1 to 122 The resistance R of -5 is the same.

Therefore, according to the embodiment of the present disclosure, the touch electrical signal is in each The signals transmitted on the second wires 122-1 to 122-5 of different lengths have the same degree of attenuation, so that the touch sensitivity of the distal end region of the touch panel is equivalent to the touch sensitivity of the near-end region, wherein the distal region is near The end region refers to the distance between the axial sensing electrodes of the touch panel and the bonding pads. With some embodiments of the present disclosure, the signal attenuation of the wires in the distal end region of the touch panel can be reduced, the touch sensitivity of the remote region can be improved, and the integrity of the signal transmission of the touch panel can be ensured.

Referring to Figure 2B, which is a first embodiment in accordance with the present disclosure, A schematic plan view of the first wires 112-1, 112-2, 112-3, and 112-4 of the first axial sensing electrode 110 of the touch panel 100 of the drawing. As shown in FIG. 2B, the first wires 112-1, 112-2, 112-3, and 112-4 have different lengths, for example, the first wires 112-1, 112-2, 112-3, and 112-4. The length can be L6, L7, L8, L9, where L6 < L7 < L8 < L9, the length of the first wires 112-1 to 112-4 is from one terminal of the first axial sensing electrode 110 to one end of the bonding pad 130. According to some embodiments of the present disclosure, the cross-sectional areas of the first wires 112-1, 112-2, 112-3, 112-4 have different widths and the same height H, for example, the first wires 112-1, 112- 2, 112-3, 112-4 width can be W6, W7, W8, W9, respectively, where W6 < W7 < W8 < W9, wherein the width of the cross-sectional area of the first wires 112-1 to 112-4 is the wire The vertical distance between the two long sides.

According to an embodiment of the present disclosure, the first wires 112-1, Each of the wires 112-2, 112-3, 112-4 has a ratio of the same length to the upper cross-sectional area, in some embodiments, due to the first wires 112-1, 112-2, 112-3, 112 The height H of the cross-sectional area of -4 is the same, so the ratio of the length of each of the first wires 112-1, 112-2, 112-3, 112-4 to the width of the upper cross-sectional area is also equal, that is, L6 /W6=L7/W7=L8/W8=L9/W9, so that the degree of attenuation of the signal transmitted by the electrical signal on each of the first wires 112-1 to 112-4 of different lengths is uniform, and thus according to the present disclosure In an embodiment, the attenuation of the signal transmitted by the electrical signal on the longer length of the first conductor 112-1 can be reduced.

In some embodiments, the length of the first wire is greater than the upper cross-sectional area The ratio of the width may be different from the ratio of the length of the second wire to the width of the upper cross-sectional area, for example, L1/W1=L2/W2=L3/W3=L4/W4=L5/W5≠L6/W6=L7/ W7=L8/W8=L9/W9. In such a case, the amount of attenuation of each signal when the first wire or the second wire is transmitted is also substantially the same.

In some embodiments, the width of the first wire is proportional to the length of the first wire and the width of the second wire is proportional to the length of the second wire.

In some embodiments, each of the first wires has a length ratio The ratio of the widths of the areas may be different, but the ratio of the length of each of the first wires to the width of the upper cross-sectional area is less than the first threshold value, for example, L6/W6≠L7/ W7≠L8/W8≠L9/W9, but |L6/W6-PV1|≦RT1,|L7/W7-PV1|≦RT1,|L8/W8-PV1|≦RT1,|L9/W9-PV1|≦RT1 Where RT1 is the first critical value and PV1 is the first preset value. Similarly, the ratio of the length of each of the second wires to the width of the upper cross-sectional area may be different, but the ratio of the length of the second wires to the width of the upper cross-sectional area is less than the second threshold Values, for example, L1/W1≠L2/W2≠L3/W3≠L4/W4≠L5/W5, but |L1/W1-PV2|≦RT2,|L2/W2-PV2|≦RT2,|L3/W3 -PV2|≦RT2,|L5/W5-PV2|≦RT2, where RT2 is the second critical value and PV2 is the second preset value. In some embodiments, the second threshold may be equal to the first threshold, and the first preset may be equal to the second preset. The first and second thresholds are tolerance values that the backend processor can tolerate when the backend processor processes the signal.

In some embodiments of the present disclosure, at the first wire 112-1 to Among the 112-4 and the second wires 122-1 to 122-5, the wire having the shortest length is, for example, the length L6 of the first wire 112-1, and the wire having the longest length is, for example, the length L1 of the second wire 122-1, wherein The width W6 of the cross-sectional area of the first wire 112-1 may be set to a process capability limit for forming the first wires 112-1 to 112-4 and the second wires 122-1 to 122-5, using deposition, lithography, and etching. In embodiments in which the first and second wires are formed, the minimum width W6 may be a lithography process capability limit. In some embodiments, the lithography process capability limit is, for example, between about 10 [mu]m and about 15 [mu]m, thus a minimum width W6. It may be in the range of from about 10 μm to about 15 μm. In some embodiments, the minimum width is transmitted within the first or second conductor based on the signal It can still be determined by the scope of the backend processor resolution.

In addition, the width of the cross-sectional area of the second conductor 122-1 having the longest length W1 may be set to be smaller than a width that affects the touch performance of the first axial sensing electrode 110 and the second axial sensing electrode 120, and in some embodiments, affects the first axial sensing electrode 110 and the second axial direction. The width of the touch performance of the sensing electrode 120 is, for example, greater than about 400 μm, and thus the maximum width W1 may be in a range of about 250 μm to about 300 μm, in which the first and second wires are prevented from sensing signals to the outside. Affect the touch signal.

As shown in FIG. 1, in some embodiments of the present disclosure, the first guide The wires 112-1 to 112-4 and the second wires 122-1 to 122-5 are disposed in the wiring region 100B surrounding the periphery of the touch region 100A. In the embodiment of Fig. 1, each of the first axial senses The measuring electrode 110 and each of the second axial sensing electrodes 120 have only one terminal connected to the first wires 112-1 to 112-4 and the second wires 122-1 to 122-5, respectively, and an even number and an odd number. The terminals of the second axial sensing electrodes 120 of the strips are respectively disposed on opposite sides of the touch area 100A, so the second wires 122-1 to 122-5 are disposed on opposite sides of the touch area 100A, and The first wires 112-1 to 112-4 are disposed on the other side of the touch region 100A.

In some other embodiments of the present disclosure, each of the first axes The sensing electrode 110 and each of the second axial sensing electrodes 120 have two terminals such that the first wires 112-1 to 112-4 and the second wires 122-1 to 122-5 are disposed in the touch region 100A. Four sides. In still other embodiments of the present disclosure, each of the first axial sensing electrodes 110 and each of the second axial sensing electrodes 120 has only one terminal, and all of the second axial sensing electrodes 120 The terminals are disposed on one side of the touch area 100A such that the second wires 122-1 to 122-5 The first wires 112-1 to 112-4 are disposed on the other side of the touch region 100A.

Regardless of the first wires 112-1 to 112-4 and the second wires 122-1 to The configuration of 122-5 is such that, for all of the first axial sensing electrodes 110, the longer the length of the first wire, the larger the cross-sectional area thereof, and for all of the second axial sensing electrodes 120, The longer the length of the second wire, the larger the cross-sectional area thereof to improve the sensitivity of the touch control in the distal end region of the touch panel. In some embodiments in which the heights of the cross-sectional areas of the wires are the same, the longer the length of the wires, the greater the width of the cross-sectional area; the width of the cross-sectional area of each wire is the same. In other embodiments, the longer the length The height of the cross-sectional area of the wire is greater. In some embodiments, the first axial sensing electrode 110 can be a transmitting shaft electrode and the second axial sensing electrode 120 is a receiving shaft electrode.

Please refer to FIG. 3A, which is a view of some embodiments in accordance with the present disclosure. 1 is a schematic cross-sectional view of the second wires 122-1, 122-2, 122-3, 122-4, and 122-5 of the second axial sensing electrode 120 of the touch panel 100 of FIG. In some embodiments, the width W' of the cross-sectional area S of each of the second wires 122-1 to 122-5 is the same, in this embodiment, when each of the second wires 122-1 to 122-5 When the ratio of the length to the upper sectional area is equal, the ratio of the length of each of the second wires 122-1 to 122-5 to the height of the upper sectional area is equal, that is, L1/H1=L2/H2=L3/ H3=L4/H4=L5/H5, so that the resistances R of each of the second wires 122-1 to 122-5 are the same, so that the electrical signal is on each of the second wires 122-1 to 122-5 having different lengths. The degree of signal attenuation transmitted is consistent.

Please refer to FIG. 3B, which is in accordance with some embodiments of the present disclosure, 1 is a schematic cross-sectional view of the first conductive lines 112-1, 112-2, 112-3, and 112-4 of the first axial sensing electrode 110 of the touch panel 100 of FIG. In some embodiments, the width W" of the cross-sectional area S of each of the first wires 112-1 to 112-4 is the same, in this embodiment, when each of the first wires 112-1 to 112-4 When the ratio of the length to the upper sectional area is equal, the ratio of the length of each of the first wires 112-1 to 112-4 to the height of the upper sectional area is equal, that is, L6/H6=L7/H7=L8/ H8=L9/H9, so that the resistances R of the first wires 112-1 to 112-4 are the same, thereby causing the electrical signals to attenuate the signals transmitted on the first wires 112-1 to 112-4 of different lengths. The degree is the same.

Moreover, in some embodiments, the length of the first wire is longer than the upper cut The ratio of the height of the area may be different from the ratio of the length of the second wire to the height of the upper cross-sectional area. In some embodiments, the height of the cross-sectional area of the first wire is proportional to the length of the first wire, and the height of the cross-sectional area of the second wire is proportional to the length of the second wire. In addition, the ratio of the length of each of the first wires to the height of the upper cross-sectional area may be different, but the ratio of the length of each of the first wires to the height of the upper cross-sectional area is less than the third threshold. . The ratio of the length of each of the second wires to the height of the upper cross-sectional area may be different, but the ratio of the length of each of the first wires to the height of the upper cross-sectional area is less than the fourth threshold. In some embodiments, the third threshold may be equal to the fourth threshold, and the third preset may be equal to the fourth preset. The third and fourth thresholds are the tolerance values that the backend processor can tolerate when the backend processor processes the signal.

FIG. 4A is a touch diagram of FIG. 1 according to some embodiments of the present disclosure. A schematic plan view of a second wire 122-3 of the second axial electrode 120 of the panel 100. 4B through 4E are diagrams showing a second embodiment of FIG. 4A in accordance with some embodiments of the present disclosure Schematic diagram of the cross-sectional area at each section line of the wire 122-3. In some embodiments, the cross-sectional areas of the second wires 122-1, 122-2, 122-3, 122-4, and 122-5 of the same strip at different wiring locations are the same, but the width and height of the cross-sectional area may be It varies with different wiring locations.

As shown in Figures 4A and 4B, when a portion of the second wire 122-3 is located When the wiring area is at a large position, the cross-sectional area S1 of the second wire 122-3 located at the wiring position may have a larger width W-1 and a smaller height H-1. As shown in FIGS. 4A and 4C, 4D, and 4E, when a portion of the second wire 122-3 is located at a position where the wiring region is small, the sectional areas S2, S3, and S4 located in the wiring regions may have a small width W. -2, W-3, W-4 and larger heights H-2, H-3, H-4, but the cross-sectional area S1 = S2 = S3 = S4. Therefore, in some embodiments, the same second wire has the same cross-sectional area at different wiring locations, so that the degree of intensity attenuation for signal transmission is uniform, and the width of the same second wire at different wiring positions can also be Adjust to match the size of the wiring area.

FIG. 5A is a touch diagram of FIG. 1 according to some embodiments of the present disclosure. A schematic plan view of a first wire 112-3 of the first axial electrode 110 of the panel 100. In some embodiments, the cross-sectional areas of the first wires 112-1, 112-2, 112-3, and 112-4 of the same strip at different wiring locations are the same, but the width and height of the cross-sectional area may vary with different wirings. Change in position.

As shown in Figures 5A and 5B, when a portion of the first wire 112-3 is located When the wiring area is at a large position, the cross-sectional area S5 of the first wire 112-3 at the wiring position may have a larger width W-5 and a smaller height H-5. As shown in FIGS. 5A and 5C and 5D, when a portion of the first wire 112-3 is located at a position where the wiring area is small, the cross-sectional area S6 of the first wire 112-3 located at the wiring positions, S7 may have a smaller width W-6, W-7 and a larger height H-6, H-7, but the cross-sectional area S5 = S6 = S7. Therefore, in some embodiments, the same first wire has the same cross-sectional area at different wiring locations, so that the intensity attenuation of the signal transmission is uniform, and the width of the same first wire at different wiring positions can also be Adjust to match the size of the wiring area.

First axial sensing electrode depicted in the embodiment of Figure 1 The shape of the first electrode unit 110U of the 110 and the second electrode unit 120U of the second axial sensing electrode 120 are designed in a diamond shape. However, the shape of the sensing electrode of the touch panel of the present disclosure is not limited thereto. In some other embodiments, the electrode units of the first and second axial sensing electrodes can take other shapes. In addition, in other embodiments, the axial sensing electrode of the touch panel of the present disclosure may also be a sensing electrode having only a single axial direction.

6 is a touch panel in accordance with some other embodiments of the present disclosure. A plan view of 100. In the embodiment of FIG. 6, the shape of the first electrode unit 110U of the first axial sensing electrode 110 and the second electrode unit 120U of the second axial sensing electrode 120 is the same as that of FIG. The embodiment is different, and the second axial sensing electrode 120 of the embodiment of FIG. 6 has two terminals, and the two terminals of each second axial sensing electrode 120 are connected to two second wires 122- 1, 122-2, 122-3 or 122-4. In some embodiments, the lengths of the second wires 122-1, 122-2, 122-3, 122-4 are L10, L11, L12, L13, respectively, and the second wires 122-1, 122-2, 122-3 The cross-sectional areas of 122-4 are S10, S11, S12, and S13, respectively, where L10>L11>L12>L13, and S10>S11>S12>S13. In some embodiments, the lengths of the second wires 122-1, 122-2, 122-3, and 122-4 are the same as the ratio of the upper cross-sectional area, that is, L10/S10=L11/S11=L12/S12=L13 /S13. therefore, The degree of attenuation of the signal transmitted by the electrical signal on each of the second conductors 122-1 to 122-4 of different lengths is uniform.

In addition, each of the first axial sensing electrodes 110 has a wiring The end is connected to a first wire 112-1 or 112-2. In some embodiments, the lengths of the first wires 112-1, 112-2 are L14, L15, respectively, and the cross-sectional areas of the first wires 112-1, 112-2 are S14, S15, respectively, where L14 < L15, and S14 <S15. Moreover, in some embodiments, the lengths of the first wires 112-1, 112-2 are the same as the ratio of the upper cross-sectional areas, that is, L14/S14=L15/S15. Therefore, the degree of attenuation of the signal transmitted by the electrical signal on each of the first conductors 112-1, 112- of different lengths is uniform.

In some embodiments, the first axial sensing electrode 110 of FIG. 5 It may be a transmitting shaft electrode, and the second axial sensing electrode 120 is a receiving shaft electrode.

FIG. 7 is a touch panel according to still other embodiments of the present disclosure. A schematic plan view of 100. In the embodiment of FIG. 7, the axial sensing electrodes 140 and 150 of the touch panel 100 both extend along the same axial direction. For example, the axial sensing electrodes 140 and 150 all extend along the X-axis direction, wherein The width of the axial sensing electrode 140 is gradually decreased along the direction of the X-axis, and the width of the axial sensing electrode 150 is gradually increasing along the direction of the X-axis. Each of the axial sensing electrodes 140 has a terminal, respectively The wires 142-1, 142-2, 142-3, 142-4 are connected to the individual bonding pads 130, and the lengths of the wires 142-1, 142-2, 142-3, 142-4 are L16, L17, L18, respectively. L19, the cross-sectional areas are S16, S17, S18, S19, respectively, wherein L16>L17>L18>L19, and S16>S17>S18>S19. Moreover, in some embodiments, the lengths of the wires 142-1, 142-2, 142-3, 142-4 are the same as the ratio of the upper cross-sectional area, that is, L16/S16=L17/S17=L18/S18=L19 /S19.

In addition, each of the axial sensing electrodes 150 has a terminal. Connected to individual bond pads 130 via wires 152-1, 152-2, 152-3, 152-4, respectively, in some embodiments, these wires 152-1, 152-2, 152-3, 152-4 The ratio is the same as the ratio of the upper cross-sectional area. Thus, in accordance with some embodiments of the present disclosure, the degree of signal attenuation transmitted by the electrical signal on each of the different lengths of conductors 142-1 through 142-4 and conductors 152-1 through 152-4 is uniform.

In some embodiments of the present disclosure, the first axial sensing power The pole 110, the second axial sensing electrode 120, and the axial sensing electrodes 140 and 150 may be made of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), Fluorine doped tin oxide (FTO), aluminum doped zinc oxide (AZO), gallium doped zinc oxide (GZO), or metal nanowires, transparent Made of a conductive film or a metal mesh. For example, the metal nanowires can be, for example, silver nanowires (SNW) or carbon nanotubes (CNTs), and can be formed via deposition, lithography, and etching processes.

In addition, the first wires 112-1 to 112-4 and the second wires 122-1 To 122-5, the wires 142-1 to 142-4, the wires 152-1 to 152-4, and the bonding pad 130 may be made of a metal or alloy material such as silver, copper, molybdenum, aluminum or a combination thereof, and may be These wires and bond pads are simultaneously formed by deposition, lithography, and etching processes, or via a printing process. In some embodiments, the bond pads can be made of the transparent conductive material described above. In some embodiments, the first wires 112-1 to 112-4 are the same material as the first axial sense electrodes 110, and/or The two wires 122-1 to 122-5 are the same material as the second axial sensing electrode 120, and the axial sensing electrodes are 140 and 150 are the same material as the wires 142-1 to 142-4, 152-1 to 152-4.

Embodiments of the present disclosure can be applied to the use of wire connection sensing Any type of touch panel, such as a sensing electrode formed on a glass substrate or a plastic film substrate, a touch panel formed on the protective cover, and a sensing electrode formed on the touch panel The touch panel on the outer surface of a substrate of the display panel, the first and second axial sensing electrodes are formed by the same transparent conductive layer, or the first and second axial sensing electrodes are respectively composed of two layers. A touch panel or the like formed of a transparent conductive layer.

According to some embodiments of the present disclosure, by adjusting the touch panel The ratio of the length of the wire of the sensing electrode to the cross-sectional area is such that the longer the length of the wire, the larger the cross-sectional area of the wire, thereby reducing the attenuation of the electrical signal transmitted from the sensing electrode located away from the bonding pad in the touch panel via the wire. To ensure the consistency of the intensity (such as voltage or current) of the touch signal of the same axial sensing electrode in the touch panel, thereby reducing the error rate of the reporting point and improving the touch sensitivity of the touch panel.

While the present invention has been described in its preferred embodiments, it is not intended to limit the invention, and it is understood by those of ordinary skill in the art that Retouching. Accordingly, the scope of the invention is defined by the scope of the appended claims.

122-1, 122-2, 122-3, 122-4, 122-5‧‧‧ second conductor

130‧‧‧Material pads

W1, W2, W3, W4, W5‧‧‧ width of the second wire

Claims (20)

A touch panel includes: a plurality of axial sensing electrodes arranged in parallel in a touch area; a plurality of bonding pads disposed on one side of the touch area; and a plurality of wires electrically connected to the touch areas The axial sensing electrodes are connected to the bonding pads, wherein the wires have a ratio of the same length to the upper cross-sectional area. The touch panel of claim 1, wherein the height of the cross-sectional area of each of the wires is the same, and the widths of the cross-sectional areas of the wires having different lengths are different, and the wires have the same length ratio. The ratio of the width of the upper cross-sectional area. The touch panel of claim 2, wherein the wires comprise a wire having the longest length, and the wire having the longest length has a maximum width which is smaller than a touch that affects the axial sensing electrodes. A width of the performance, and the width affecting the touch performance of the axial sensing electrodes is greater than 300 μm. The touch panel of claim 2, wherein the wires comprise a wire having the shortest length, the wire having the shortest length having a minimum width, the minimum width being a process capability limit of the wires, and The process capability limit of these wires is between 10 μm and 15 μm. The touch panel of claim 1, wherein the width of the cross-sectional area of each of the wires is the same, and the heights of the cross-sectional areas of the wires having different lengths are different, and the wires have the same length ratio. The ratio of the height of the upper cross-sectional area. The touch panel of claim 1, wherein the same one The wires have an identical cross-sectional area at different wiring locations, and the height and width of the cross-sectional area have different widths and different heights depending on different wiring locations. The touch panel of claim 1, wherein the wires are disposed in a wiring area around the periphery of the touch area, and each of the axial sensing electrodes has two terminals electrically connected to Two of the wires, or each of the axial sensing electrodes, have only one terminal electrically connected to one of the wires. The touch panel of claim 1, wherein the axial sensing electrodes are a transmitting shaft electrode or a receiving shaft electrode. The touch panel of claim 1, wherein the axial sensing electrodes are the same material as the wires. A touch panel includes: a plurality of first axial sensing electrodes arranged in parallel in a touch area; a plurality of second axial sensing electrodes are interlaced with the first axial sensing electrodes, and Parallelly arranged in the touch area; a plurality of bonding pads are disposed on one side of the touch area; and a plurality of first wires are electrically connected to the first axial sensing electrodes to the bonding pads, wherein The first wires have a first ratio of the same length to the upper cross-sectional area; and the plurality of second wires are electrically connected to the second axial sensing electrodes to the bonding pads, wherein the second wires The wire has a second ratio of the same length to the upper cross-sectional area. The touch panel of claim 10, wherein each of the touch panels The cross-sectional areas of the first wires are the same, and the widths of the cross-sectional areas of the first wires having different lengths are different, and the first wires have a third ratio of the same length to the width of the upper cross-sectional area; The height of the cross-sectional area of each of the second wires is the same, and the widths of the cross-sectional areas of the second wires having different lengths are different, and the second wires have a fourth ratio of the same length to the width of the upper cross-sectional area. . The touch panel of claim 11, wherein the third ratio of the first wires is different from the fourth ratio of the second wires. The touch panel of claim 10, wherein the first and second wires have the same cross-sectional area, and the first and second wires comprise a longest wire, the longest length. The wire has a maximum width that is less than a width that affects the touch performance of the axial sensing electrodes, and the width that affects the touch performance of the axial sensing electrodes is greater than 300 μm. The touch panel of claim 10, wherein the first and second wires have the same cross-sectional area, and the first and second wires comprise a wire having the shortest length, and the length is the shortest. The wire has a minimum width which is a process capability limit of the first and second wires, and the process capability limit of the wires is between 10 μm and 15 μm. The touch panel of claim 10, wherein the width of the cross-sectional area of each of the first wires is the same, and the heights of the cross-sectional areas of the first wires having different lengths are different, the first wires Have one a fifth ratio of the same length to the height of the upper cross-sectional area; and a width of the cross-sectional area of each of the second wires is the same, and the heights of the cross-sectional areas of the second wires having different lengths are different, and the second wires are different There is a sixth ratio of the same length to the height of the upper cross-sectional area. The touch panel of claim 15, wherein the fifth ratio of the first wires is different from the sixth ratio of the second wires. The touch panel of claim 10, wherein the first wire of the same strip or the second wire of the same strip has the same cross-sectional area at different wiring positions, and the height and width of the cross-sectional area follow Different wiring locations with different widths and different heights. The touch panel of claim 10, wherein the first axial sensing electrodes are a transmitting axis electrode, and the second axial sensing electrodes are a receiving axis electrode. The touch panel of claim 10, wherein the first and second wires are disposed on a wiring area surrounding the periphery of the touch area, and each of the first and second axial sensing electrodes Having two terminals electrically connected to the two first and second wires, or each of the first and second axial sensing electrodes has only one terminal electrically connected to the first one, The second wire. The touch panel of claim 10, wherein the first axial sensing electrodes are the same material as the first conductive wires, or the second axial sensing electrodes and the second conductive wires are used. the same.