TW201531912A - Touch panel - Google Patents

Abstract

A touch panel includes a first conductive electrode and a second conductive electrode isolated from the first conductive electrode. The first conductive electrode has a recess, wherein the surface of the recess is depressed and lowered in position to the surface of the first conductive electrode. The first conductive electrode further includes a high electric charge density portion and a low electric charge density portion disposed respectively disposed at a portion of the surroundings of the recess.

Description

Touch panel

The invention relates to a touch panel, in particular to a touch panel with high sensing sensitivity.

Due to the human-computer interaction characteristics of the touch panel, it has been widely used in smart phones, GPS navigator systems, tablet PCs, personal digital assistants (PDAs), and notebook computers. (laptop PC) and other electronic products. In the current touch panel technology, the projected capacitive touch technology uses a conductive user's finger to approach or touch the touch panel to attract a part of the power line in the panel to change the capacitance between the electrodes to control the touch. The panel is controlled. Wherein, when the capacitance value changes more, the ratio of the capacitance value change amount to the total capacitance value of the electrode load is larger, indicating that the sensing sensitivity of the touch panel is stronger. However, when the size of the touch panel is larger, the number of intersection nodes of the transmitting end electrode and the receiving end electrode is larger, so that the ratio of the capacitance value change amount to the total capacitance of the electrode is smaller, and the sensing sensitivity is decreased. Therefore, how to improve the sensing sensitivity of the touch panel is an issue that the industry still needs to continue to study.

One of the main purposes of the present invention is to provide a touch panel by forming a high charge density portion and a low charge density portion in a conductive electrode to make the power line have a thin and dense region, thereby improving the touch panel. The amount of change in the touch capacitance value during operation to improve its sensing sensitivity.

To achieve the above objective, the present invention discloses a touch panel including a first conductive electrode and a second conductive electrode. The first conductive electrode has at least one recess, the recess being lower than the first a surface of the conductive electrode, and the first conductive electrode includes at least one high charge density portion and at least one low charge density portion respectively disposed around the recess, and the second conductive electrode is insulated from the first conductive electrode.

10, 100, 200, 300, 400, 500, 600, 700, 800, 900‧‧‧ touch panels

101‧‧‧ touch area

102‧‧‧ surrounding area

103, 902‧‧‧ substrate

12‧‧‧First conductive electrode

12a, 14a‧‧‧electrode pads

12b, 14b‧‧‧ Connections

121‧‧‧ main part

14‧‧‧Second conductive electrode

16, 161, 162, 163, 164 ‧ ‧ hollow

18‧‧‧High charge density fraction

20‧‧‧Low charge density fraction

22‧‧‧Outstanding pattern

24‧‧‧Compensation electrode

26, 26a, 26b, 26c‧‧‧Dummy electrode

28‧‧‧Insulation components

30‧‧‧Insulation

104‧‧‧ touch structure

108‧‧‧Transparent substrate

110‧‧‧First insulation

110a‧‧‧ first side

110b‧‧‧ second side

112‧‧‧First conductive pattern

114‧‧‧Second conductive pattern

116, 120, 504‧‧ ‧ adhesive layer

118‧‧‧ display panel

1181‧‧‧Upper substrate

1181a‧‧‧Outer surface

1181b‧‧‧ inner surface

350‧‧‧Touch display device

502‧‧‧Second insulation

‧‧‧‧ angle

D1, D2, D3, d1, d2, d3, d4‧‧‧ distance

R, r‧‧‧ radius of curvature

S‧‧‧ size

W1, W2, W3‧‧‧ wide

X‧‧‧ first direction

Y‧‧‧second direction

Z‧‧‧Vertical projection direction

FIG. 1 is a top plan view of a first embodiment of a touch panel of the present invention.

Fig. 2 is a partially enlarged schematic view showing the touch panel shown in Fig. 1.

FIG. 3 is a partially enlarged schematic view showing a first conductive electrode of a second embodiment of the touch panel of the present invention.

4 is a partially enlarged schematic view showing a first conductive electrode of a third embodiment of the touch panel of the present invention.

FIG. 5 is a partially enlarged schematic view showing an electrode pad of a fourth embodiment of the touch panel of the present invention.

FIG. 6 is a partially enlarged schematic view showing the first conductive electrode of the fifth embodiment of the touch panel of the present invention.

FIG. 7 is a partial top plan view of a sixth embodiment of the touch panel of the present invention.

FIG. 8 is a partial top plan view showing a modified embodiment of the sixth embodiment of the touch panel of the present invention.

FIG. 9 is a partial top plan view of a seventh embodiment of the touch panel of the present invention.

FIG. 10 is a partial top plan view of an eighth embodiment of the touch panel of the present invention.

11 is a schematic cross-sectional view of a touch panel of the present invention.

FIG. 12 is a cross-sectional view showing a first variation of the touch panel of the present invention.

Figure 13 is a cross-sectional view showing a second variation of the touch panel of the present invention.

Figure 14 is a cross-sectional view showing a third variation of the touch panel of the present invention.

Figure 15 is a cross-sectional view showing a fourth variation of the touch panel of the present invention.

Figure 16 is a cross-sectional view showing a fifth variation of the touch panel of the present invention.

Figure 17 is a cross-sectional view showing a sixth variation of the touch panel of the present invention.

The present invention will be further understood by those skilled in the art to which the present invention pertains. The content of the Ming. Moreover, for convenience of description, the various figures of the present invention are merely illustrative to make the present invention easier to understand, and the detailed ratios thereof can be adjusted according to the needs of the design.

Please refer to FIG. 1 and FIG. 2 , which is a first embodiment of the touch panel of the present invention. FIG. 2 is a partial enlarged view of the touch panel shown in FIG. 1 . The touch panel 10 of the present invention is exemplified by a capacitive touch panel, but is not limited thereto. The touch panel 10 includes at least one first conductive electrode 12 and at least one second conductive electrode 14 disposed on a substrate 103. The touch panel 10 of the present embodiment includes a plurality of first conductive electrodes 12 extending along the first direction X. Provided, and including a plurality of second conductive electrodes 14 extending along the second direction Y. As shown in FIG. 1, the first direction X is not parallel to the second direction Y, and in the preferred embodiment, the first direction X is substantially perpendicular to the second direction Y. Therefore, in a plan view, the first conductive electrode 12 and the second conductive electrode 14 intersect each other. Furthermore, an insulating member 28 is disposed at an intersection of each of the first conductive electrode 12 and the second conductive electrode 14, and each insulating member 28 is located between the first conductive electrode 12 and the second conductive electrode 14 in the vertical projection direction Z. So that the first conductive electrode 12 and the second conductive electrode 14 are insulated from each other. In other embodiments, a full-surface insulating layer may be disposed between the first conductive electrode 12 and the second conductive electrode 14 to electrically insulate the first conductive electrode 12 and the second conductive electrode 14 from each other. In addition, each of the first conductive electrodes 12 may selectively include a plurality of electrode pads 12a and a plurality of connecting portions 12b, and each connecting portion 12b is located between two adjacent electrode pads 12a of the same first conductive electrode 12 to Two adjacent electrode pads 12a of the same first conductive electrode 12 are electrically connected. Similarly, each of the second conductive electrodes 14 may selectively include a plurality of electrode pads 14a and a plurality of connecting portions 14b, and each connecting portion 14b is located between two adjacent electrode pads 14a of the same second conductive electrode 14. The two adjacent electrode pads 14a of the same second conductive electrode 14 are electrically connected. The electrode pads 12a, 14a of the present embodiment have a rhombus-like shape, and the connecting portions 12b, 14b have a rectangular-like shape, but are not limited thereto. As can be seen from FIG. 1, the connecting portions 12b of the first conductive electrode 12 are located at the intersection of the first conductive electrode 12 and the second conductive electrode 14, so that the connecting portions 12b, 14b and the insulating member 28 are in the vertical projection direction Z. Partial overlap. In addition, the first conductive electrode 12 and the second conductive power according to the embodiment The position of the pole 14 can be roughly divided into the touch area 101 and the surrounding area 102. The touch area 101 is a main set area of the first conductive electrode 12 and the second conductive electrode 14, but the first conductive The electrode 12 and the second conductive electrode 14 may also extend to the peripheral region 103. In addition, the touch panel 10 may also include a plurality of wires (not shown) disposed in the surrounding area 13 and electrically connected to a first conductive electrode 12 or a second conductive electrode 14, respectively, but not limited thereto. 103 can also set other components of the touch panel.

According to the present invention, the surface of each of the first conductive electrodes 12 has at least one recess 16 in In this embodiment, the surface of each of the diamond electrode pads 12a has four uniformly distributed recesses 16, but not limited thereto, the number and arrangement of the recesses 16 can be designed and modified as needed. The term "depression" as used in this specification is as follows. Since the first conductive electrode 12 is composed of a layer of conductive material, it has a substantially flat upper surface, and the presence of the recess 16 causes the surface of the first conductive electrode 12 at the recess 16 to be larger than the first conductive electrode 12 The surface having no portion of the recess 16 is made low, or the portion of the first conductive electrode 12 having the recess 16 does not have the material of the first conductive electrode 12. In other words, the recess 16 may be a through hole or a blind hole, the through hole that penetrates the conductive material layer constituting the first conductive electrode 12; and the so-called blind hole, that is, it does not penetrate the first conductive electrode 12, only in the blind hole The surface at which it is lower is lower than the surface of the portion where the first conductive electrode 12 does not have a blind hole. In addition, as shown in FIG. 2, the recess 16 is preferably a closed pattern. In the present embodiment, the recess 16 has a cloud pattern or a pattern similar to a clover, for example, the first conductive electrode 12 is included around each recess 16. Three protruding patterns 22 (as indicated by the dashed circle in FIG. 2), wherein each of the protruding patterns 22 protrudes from the inner side of the lateral recess of the recess 16 . Each of the protruding patterns 22 in this embodiment is a tip pattern comprising a tip or a sharp corner, and the angle α between the two sides of the tip pattern is less than 180 degrees to constitute the tip or the sharp corner. It should be noted that when the tip of the tip pattern or the sides of the sharp corner are not straight (for example, an arc), the angle α may be defined by the side tangent closest to the tip or the sharp corner, such as the dotted line in the figure. Tangent. In addition, since the human eye can observe a distance of more than 30 micrometers, the maximum dimension S of each recess 18 is preferably less than or equal to about 30 micrometers to avoid user touch. The control surface observes the recess 18 to affect the visual effect of the touch panel 10. According to Gauss's law, the electric field on the surface of a closed charged object is proportional to the surface charge density of the surface. When the electric field in a certain area is large, the area is densely charged and the power line is densely distributed. Therefore, when a voltage is applied to the first conductive electrode 12 of the present invention, portions of the surface of the first conductive electrode 12 having the protruding pattern 22 respectively form a high charge density portion 18, and with respect to the high charge density portion 18, the protruding pattern 22 is A low charge density portion 20 is formed on both sides. As can be seen from the above, each of the first conductive electrodes 12 includes at least one high charge density portion 18 and at least one low charge density portion 20 since each of the first conductive electrodes 12 includes at least one recess 16 having a special design pattern. However, the pattern of the recess 16 is not limited to the one disclosed in the embodiment, and the surface of the first conductive electrode 12 can have both the high charge density portion 18 and the first conductive electrode 12 structure of the low charge density portion 20 or the pattern of the electrode pad 12a. The design should be the inventive spirit of the present invention. In different embodiments, the surface of the first conductive electrode 12 may also have a tip discharge effect on the surface thereof by providing other components, for example, a plurality of protrusions are disposed on the surface of the first conductive electrode 12 to make the first conductive electrode 12 It has both a high charge density portion 18 and a low charge density portion 20.

According to the present invention, due to the arrangement of the recesses 16, in the second conductive electrode 12 to the second In the power lines of the conductive electrodes 14, the power lines of some regions may be dense, that is, the power lines of the high charge density portion 18 may be dense, and the portions of the other power lines that are looser may be regarded as the low charge density portion 20. When the user's finger touches the touch panel 10, part of the power line is attracted by the finger and moved from the second conductive electrode 14 to the finger, including the dense power line of the high charge density portion 18, so the design of the present invention can increase the unit area. The amount of power line carried by the finger, that is, the amount of change in capacitance between the first conductive electrode 12 and the second conductive electrode 14 is increased. This design can increase the amount of capacitance change to the total value when the total capacitance value is constant. The ratio of capacitance values effectively improves the sensing sensitivity.

The touch panel of the present invention is not limited to the above embodiments, and other embodiments or variations of the present invention will be further hereinafter disclosed. It should be noted that, in order to simplify the description and highlight the embodiments. The same components are denoted by the same reference numerals, and the repeated description will not be repeated.

Please refer to FIG. 3 , which is the first guide of the second embodiment of the touch panel of the present invention. A partially enlarged schematic view of the electrical electrode 12. This embodiment is different from the first embodiment in that the recess 161 of the first conductive electrode 12 has a cloud pattern, and the electrode pad 12a includes more than three protruding patterns 22 around each recess 161, as shown by a dotted circle in the figure. At the same time, FIG. 3 shows that there are seven protruding patterns 22.

Please refer to FIG. 4 , which is a first guide of the third embodiment of the touch panel of the present invention. A partially enlarged schematic view of the electrical electrode 12. The difference between this embodiment and the first embodiment is that an electrode pad 12a includes only one recess 162, and when the maximum dimension S of the recess 162 exceeds 30 micrometers, the compensation electrode 24 may be additionally disposed in the recess 162 to avoid Large-sized depressions 162 are seen by the human eye and affect the visual effect. The compensation electrode 24 can have a shape and pattern similar to the recess 162, but is slightly smaller in size than the recess 162. For example, if the first conductive electrode 12 is composed of a conductive material layer, the compensation electrode 24 is preferably composed of the same conductive material layer, or the first conductive electrode 12 and the compensation electrode 24 may be the same. The process is formed. In addition, the tangential distance d1 between the compensation electrode 24 and the first conductive electrode 12 is preferably less than or equal to about 30 micrometers, and the tangential distance refers to a vertical distance or a maximum distance between tangent lines of the two electrode patterns, which is mentioned below. And the tangent distance is the same, and the first is described.

Please refer to FIG. 5 , which is a fourth embodiment of the touch panel of the present invention. A partially enlarged schematic view of 12a. The recess 163 of the present embodiment has a different pattern than the first embodiment. As shown in Fig. 5, the protruding pattern 22 is a small radius of curvature pattern having a circular arc shape having a radius of curvature r. On the other hand, the partial pattern of the recess 163 adjacent to the protruding pattern 22 also has a radius of curvature R, and the radius of curvature R is larger than the radius of curvature r of the protruding pattern 22 (the aforementioned small radius of curvature pattern). Similarly, according to the Gauss's theorem, since the protruding pattern 22 has a small radius of curvature r, On the other hand, the other portions of the electrode pad 12a on both sides or around the protruding pattern 22 are not in a small radius of curvature pattern, so that a high charge density portion 18 is formed in the protruding pattern 22, and other portions of the electrode pad 12a adjacent to the protruding pattern 22 are formed. The low charge density portion 20 is utilized, whereby the sensing sensitivity of the touch panel 10 can be improved.

Please refer to FIG. 6 , which is a first guide of the fifth embodiment of the touch panel of the present invention. A partially enlarged schematic view of the electrical electrode 12. The difference between this embodiment and the first embodiment is that the recess 164 has an "H"-shaped pattern, and the protruding pattern 22 of the electrode pad 12a is a partial electrode pad 12a between two parallel lines in the "H"-shaped pattern, forming The high charge density portion 18, for example at a 90 degree sharp corner, will have a higher charge density, while the other portions of the electrode pad 12a around the recess 164 form a low charge density portion 20.

Please refer to FIG. 7 , which is a partial view of a sixth embodiment of the touch panel of the present invention. In order to show that the second conductive electrode 14 is disposed on the upper side of the first conductive electrode 12, and the two are formed by different conductive material layers, the first conductive electrode 12 in the figure is indicated by oblique lines. Compared with the first embodiment, the difference of the touch panel 100 of the present embodiment includes that the entire second conductive electrode 14 has a uniform width W2, and there is no distinction between the electrode pads and the connection portion. Moreover, at the intersection of the first conductive electrode 12 and the second conductive electrode 14, the width W2 of the second conductive electrode 14 is substantially the same as the width W1 of the first conductive electrode 12 (ie, the width of the connecting portion 12b). The maximum width W3 of the electrode pad 12a of the first conductive electrode 12 is larger than the width W1 of the connecting portion 12b. According to the embodiment, the first conductive electrode 12 is a driving electrode, and the second conductive electrode 14 is a receiving electrode, and each of the first conductive electrodes 12 includes a plurality of electrode pads 12a and a connecting portion between the adjacent two electrode pads 12a. 12b, wherein the electrode pad 12a has a rhombus-like or hexagonal shape, and the connecting portion 12b has a rectangular shape or a rectangular-like shape. In the present embodiment, the first conductive electrode 12 has a smaller width W1 at the intersection of the two electrodes, similarly having a neck structure to reduce the first conductive electrode 12 and the second conductive electrode 14 in a vertical direction. The overlapping area in the projection direction Z, this design can reduce the first conductivity The load capacitance between the electrode 12 and the second conductive electrode 14 reduces the total capacitance of the electrode, which can improve the ratio of the capacitance change amount of the touch panel 100 during the touch operation to the total capacitance value, thereby improving the sense. Sensitivity. Furthermore, since each of the electrode pads 12a is provided with at least one recess 16, each side of the second conductive electrode 14 between the adjacent electrode pads 12a has at least one recess 16, that is, at least two recesses. 16 corresponds to opposite sides of the second conductive electrode 14, respectively, and the minimum distance D1 of the recess 16 on the adjacent two electrode pads 12a across the second conductive electrode 14 is preferably 1.2 mm, and the maximum distance D2 is preferably The distance between the 7.8 mm, that is, the recess 16 on both sides of the second conductive electrode 14 ranges from about 1.2 mm to about 7.8 mm.

Furthermore, due to the width of the first conductive electrode 12 at the intersection with the second conductive electrode 14, The touch panel 100 of the present embodiment can selectively include a plurality of dummy electrodes 26 respectively disposed on the same first conductive electrode. Between two adjacent electrode pads 12a, the tangential distance d2 of each dummy electrode 26 and the adjacent first conductive electrode 12 is preferably less than or equal to 30 micrometers. As shown in FIG. 7, the dummy electrodes 26 are at least partially overlapped with the second conductive electrodes 14 in the vertical projection direction Z, and the dummy electrodes 26 of the present embodiment have a trapezoidal shape, but are not limited thereto. The floating dummy electrode 26 can compensate the visual effect of the touch panel 100. In addition, when the touch panel 100 is disposed on the front side of the display panel, the dummy electrode 26 can also block noise interference from the display panel. Please refer to FIG. 8. FIG. 8 is a partial top plan view showing a modified embodiment of the sixth embodiment of the touch panel of the present invention. The difference between the present embodiment and the sixth embodiment is that the dummy electrode 26 has a diamond-like or hexagonal pattern, but not limited thereto. In other variations, the dummy electrode 26 may also be octagonal. In FIG. 8, a dummy electrode 26 is disposed between the connecting portions 12b of the adjacent two first conductive electrodes 12, which can also improve the visual effect and block the noise interference of the display panel.

Please refer to FIG. 8. FIG. 8 is a partial top plan view showing a modified embodiment of the sixth embodiment of the touch panel of the present invention. The difference between the present modified embodiment and the sixth embodiment lies in the dummy electrode 26 has a diamond-like or hexagonal pattern, but is not limited thereto. In other variations, the dummy electrode 26 may also be octagonal. In FIG. 8, a dummy electrode 26 is disposed between the connecting portions 12b of the adjacent two first conductive electrodes 12, which can also improve the visual effect and block the noise interference of the display panel.

Please refer to FIG. 9 , which is a partial view of a seventh embodiment of the touch panel of the present invention. See the schematic. Compared with the previous embodiment, the shape of the connecting portion 12b of the first conductive electrode 12 of the touch panel 200 of the present embodiment is still rectangular, but the shape of the electrode pad 12a includes an "E" shape or is mirror-symmetrical. The two "E" shaped patterns are formed into an electrode pad 12a to form a "king" shape (or a fishbone shape). Further, each of the electrode pads 12a includes a main portion 121 which is rectangular in shape and has a long side of the rectangle disposed along the second direction Y. In a preferred embodiment, the distance d3 between the main portion 121 and the adjacent second conductive electrode 14 is from about 200 microns to about 300 microns. This design can increase the distance between the main portion 121 and the adjacent second conductive electrode 14. The field power line, in turn, increases the amount of capacitance change during touch. In addition, three cloud-shaped recesses 163 are provided in each electrode pad 12a of the present embodiment, the recesses 163 are located in the main portion 121, and the distance D3 between the recesses 163 on the adjacent two electrode pads 12a ranges from about 1.2 mm. To about 7.8 mm. Furthermore, similar to the previous embodiment, the width W3 of the electrode pad 12a of the first conductive electrode 12 is larger than the width W1 of the connection portion 12b, and at the intersection of the first conductive electrode 12 and the second conductive electrode 14, The width W1 of the conductive electrode 12 and the width W2 of the second conductive electrode 14 are substantially the same to reduce the load capacitance at the intersection of the electrodes, reduce the total capacitance of the electrode, and thereby improve the sensing sensitivity. In addition, the dummy electrode 26 is selectively disposed between the adjacent electrode pads 12a, and at least partially overlaps the second conductive electrode 14 in the vertical projection direction Z. The dummy electrode 26 of the present embodiment has a rectangular shape.

Please refer to FIG. 10, which is a part of an eighth embodiment of the touch panel of the present invention. A bird's eye view. The difference between the touch panel 300 of the present embodiment and the previous embodiment is that the dummy electrode 26 extends laterally along the first direction X to fill the "E"-shaped or "King"-shaped electrode pad 12a and the first The gap between the two conductive electrodes 14 is such that the dummy electrode 26 has a "T" shape (for example, dummy electrodes 26a, 26b) or an "I" shape (for example, dummy electrode 26c). Further, the tangential distance d4 between the dummy electrode 26 and the adjacent first conductive electrode 12 is preferably less than or equal to 30 micrometers. This embodiment increases the graphic range of the dummy electrode 26, and can also effectively improve the visual effect and provide the function of shielding the noise interference of the display panel.

It should be noted that the pattern, number and setting position of the recesses disclosed in the foregoing embodiments are noted. The graphic design of the conductive electrodes and the conductive electrodes are merely examples and are not intended to limit the invention. However, in a preferred embodiment, the electrode pads of the first conductive electrode preferably have an equal number of recesses, and the recesses in the same electrode pad are preferably evenly distributed in the electrode pads to uniformize the touch panel. The sensing effect of each lack of desire.

The relative arrangement positions and shapes of the first conductive electrodes, the second conductive electrodes, and the recesses in the touch panel of the present invention have been described in the foregoing. The relative stacking manner of the film layers in the touch panel of the present invention will be further described below. Please refer to FIG. 11 , which is a cross-sectional view of the touch panel of the present invention. For example, the touch panel 300 includes a touch structure 104 disposed on the transparent substrate 103 by an adhesive layer 116. The transparent substrate 103 has a transmittance of, for example, 85% or more. The touch structure 104 includes a first insulating layer 110 (corresponding to the insulating layer 30 shown in FIG. 3 ), a first conductive electrode layer 112 and a second conductive electrode layer 114 , wherein the first conductive electrode layer 112 and the first conductive electrode layer 112 The second conductive electrode layer 114 includes the first conductive electrode 12 and the second conductive electrode 14 in the foregoing embodiments, that is, the first conductive electrode 12 and the second conductive electrode 14 shown in FIGS. 1 to 10 are in the present embodiment. In the figure, the arrangement positions are indicated by the first conductive electrode layer 112 and the second conductive electrode layer 114, respectively. The first insulating layer 110 may include, for example, a transparent insulating film, a transparent insulating plastic substrate or a transparent insulating glass substrate, an organic insulating layer, and an inorganic insulating layer, but is not limited thereto. The first conductive electrode layer 112 is disposed on the first side 110a of the first insulating layer 110, and the second conductive electrode layer 114 is disposed on the second side 110b of the first insulating layer 110, but limit. In addition, the substrate 103 The transparent substrate is a transparent cover plate, and the substrate 103 can also be regarded as a part of the touch panel 300 for providing the protection function of the touch structure 104, and the upper surface thereof is available for the user to perform a touch operation. The substrate 103 can be, for example, a transparent substrate such as a glass substrate, a quartz substrate, or a plastic substrate, but is not limited thereto. In addition, the touch panel 300 can be disposed on the upper side of the display panel 118. The adhesive layer 120 disposed between the touch panel 300 and the display panel 118 can be combined with the touch panel 300 and the display panel 118 to form a touch. The display device 350 is controlled. The display panel 118 can include a liquid crystal display panel, an organic light emitting diode display panel, an electrowetting display panel, an electronic ink display panel, or a plasma display panel, but is not limited thereto. It should be noted that the relative stacking manner of the film layers of the touch panel of the present invention disclosed in FIG. 11 can be applied to the foregoing first to seventh embodiments of the present invention, and is not limited to the eighth embodiment. . For example, when applied to the first embodiment, the first insulating layer 110 may indicate the position in the vertical direction of the insulating member 28 shown in Fig. 1. In addition, a decorative layer (not shown) may be selectively formed on the periphery of the transparent substrate 103, and the decorative layer is composed of at least one of ceramic, diamond-like carbon, color ink, photoresist or resin material.

The stacking manner of the film layers in the touch panel of the present invention is not limited to those shown in FIG. 11, and other variations of the present invention will be further described hereinafter, and the stacking manner can be applied to the foregoing embodiments. Please refer to FIG. 12, which is a cross-sectional view showing a first variation of the touch panel of the present invention. As shown in FIG. 12, the adhesive layer 116 of the touch panel 400 of the present modification is disposed between the second conductive electrode layer 114 and the first insulating layer 110. That is, the second conductive electrode layer 114 is directly formed on the surface of the substrate 103, and the second conductive electrode layer 114 is bonded to the first insulating layer 110 through the adhesive layer 116. In addition, in other variations, the first conductive electrode layer 112 may also be disposed on the upper surface of the first insulating layer 110, wherein the upper surface refers to a surface (not shown) facing the second conductive electrode layer 114.

Please refer to FIG. 13 , which is a cross-sectional view showing a second variation of the touch panel of the present invention. As shown in FIG. 13, compared with FIG. 11, the touch panel 500 of the present modification further includes A second insulating layer 502 and an adhesive layer 504. The second insulating layer 502 is disposed between the second conductive electrode layer 114 and the substrate 103, and the second conductive electrode layer 114 is directly formed on the second insulating layer 502. The adhesive layer 116 is disposed between the second insulating layer 502 and the substrate 103 for bonding the second insulating layer 502 and the substrate 103. The second insulating layer 502 may include, for example, a transparent insulating film, a transparent insulating plastic substrate, or a transparent insulating glass substrate, but is not limited thereto. In addition, the adhesive layer 504 is disposed between the second conductive electrode layer 114 and the first insulating layer 110 and is used to bond the second conductive electrode layer 114 and the first insulating layer 110.

Please refer to FIG. 14 , which is a cross-sectional view showing a third variation of the touch panel of the present invention. schematic diagram. As shown in FIG. 14, the touch panel 600 of the present modification omits the adhesive layer 116 as compared with FIG. That is, the second conductive electrode layer 114, the first insulating layer 110 and the first conductive electrode layer 112 of the present modification are sequentially formed on the lower surface of the substrate 103 without using the adhesive layer in the aforementioned variation. The first insulating layer 110 is bonded to the substrate 103. In addition, a decorative layer (not shown) may be selectively formed on the periphery of the substrate 103, and the decorative layer is composed of at least one of ceramic, diamond-like carbon, color ink, photoresist or resin material. Furthermore, a conductive pattern of a portion of the second conductive electrode layer 114 can be selectively disposed on the decorative layer. In addition, in other embodiments, the first conductive pattern 112 and the second conductive pattern 114 may also be disposed on the same surface on the substrate 103.

Please refer to FIG. 15 , which is a cross-sectional view showing a fourth variation of the touch panel of the present invention. schematic diagram. As shown in FIG. 15 , compared with FIG. 11 , the touch panel 700 of the present modification omits the adhesive layer for bonding the touch panel 700 and the display panel 118 when applied to the touch display device 350 . The display panel 118 of the present modification includes an upper substrate 1181, such as a color filter substrate of the display panel 118, but is not limited thereto. Moreover, the first conductive electrode layer 112, the first insulating layer 110 and the second conductive electrode layer 114 are sequentially formed on the outer surface 1181a of the upper substrate 1181 without using the aforementioned adhesive layer to bond the first insulating layer 110 with The upper substrate 1181 is bonded. In addition, the substrate 103 is still disposed on the second conductive electrode layer 114 through the adhesive layer 116. In addition, it can be selectively used in transparent groups. A decorative layer (not shown) is formed on the periphery of the plate 103, and the decorative layer is composed of at least one of ceramic, diamond-like carbon, color ink, photoresist or resin material. Furthermore, portions of the first and second conductive electrode layers 112, 114 are selectively disposed on the decorative layer. In addition, in a variant embodiment, the first and second conductive electrode layers 112, 114 may also be disposed on the same surface on the substrate 1181.

Please refer to FIG. 16, which is a cross section of a fifth variation of the touch panel of the present invention. schematic diagram. As shown in FIG. 16, the touch display device 350 of the present modification further omits the first insulating layer as compared with FIG. That is, the first conductive electrode layer 112 of the touch panel 800 of the present modification is disposed on an inner surface 1181b of the upper substrate 1181 and is located in the display panel 118, and the second conductive electrode layer 114 is formed and disposed on the upper surface On the outer surface 1181a of the substrate 1181, the first conductive electrode layer 112 and the second conductive electrode layer 114 are electrically insulated from each other through the upper substrate 103.

Please refer to FIG. 17, which is a cross-sectional view of a sixth variation of the touch panel of the present invention. schematic diagram. As shown in FIG. 17, compared with FIG. 11, the touch panel 900 of the present modification omits the adhesive layer 120, but further includes a substrate 902, and the first conductive electrode layer 112, the first insulating layer 110 and the first The two conductive electrode layers 114 can be directly formed on the substrate 902 in sequence. Then, the substrate 902 is bonded to the substrate 103 by the adhesive layer 116. In addition, a decorative layer (not shown) may be selectively formed on the periphery of the transparent substrate 103, and the decorative layer is composed of at least one of ceramic, diamond-like carbon, color ink, photoresist or resin material. Furthermore, portions of the first and second conductive electrode layers 112, 114 are selectively disposed on the decorative layer. In addition, in a variant embodiment, the first and second conductive electrode layers 112, 114 may also be disposed on the same surface on the substrate 902.

In summary, the present invention provides one or more recesses on the first conductive electrode. The first conductive electrode has a high charge density portion and a low charge density portion, wherein the high charge density portion has a dense power line, thereby increasing the number of power lines per unit area attracted by the finger or the stylus during touch, and increasing the capacitance value variation and The ratio of the total capacitance value can effectively improve the sensing of the touch panel Sensitivity. Furthermore, the present invention can reduce the load capacitance of the driving end by reducing the overlapping area of the first conductive electrode (for example, the driving electrode) and the second conductive electrode (for example, the receiving electrode), and can also improve the sensing sensitivity of the touch panel. Avoid visually observing the overlapping portions of the electrodes by the human eye. In addition, the "E" shaped electrode pad design can increase the far field power line between the electrodes, which can also increase the sensing sensitivity. The above-mentioned design for improving the sensing sensitivity can be applied to the reduction of the capacitive stylus, that is, the same capacitance value variation can be obtained by using a smaller stylus pen tip than the prior art, and can also be applied to increase The same touch accuracy can be achieved when the touch range or distance of the touch or proximity touch is achieved, and the first and second conductive electrodes are made even if the size of the touch panel is increased. The intersection node is increased, and the touch panel structure design disclosed in the present invention can also be used to make the touch operation have good signal recognition without increasing the driving signal strength.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

12‧‧‧First conductive electrode

12a‧‧‧electrode pad

12b‧‧‧Connecting Department

16‧‧‧ dent

18‧‧‧High charge density fraction

20‧‧‧Low charge density fraction

22‧‧‧Outstanding pattern

‧‧‧‧ angle

S‧‧‧ size

Claims (21)

A touch panel includes: a first conductive electrode, the first conductive electrode has at least one recess, the recess is lower than a surface of the first conductive electrode, and the first conductive electrode includes at least one high charge density portion At least one low charge density portion is respectively disposed around the recess; and a second conductive electrode is insulated from the first conductive electrode. The touch panel of claim 1, wherein the first conductive electrode comprises at least one protruding pattern around the recess, the protruding pattern protruding from an outer side of the recess toward an inner side of the recess, and the protruding pattern is formed The high charge density portion, and the two sides of the protruding pattern constitute the low charge density portion. The touch panel of claim 2, wherein the protruding pattern is a tip pattern. The touch panel of claim 3, wherein an angle between the two sides of the tip pattern is less than 180 degrees. The touch panel of claim 2, wherein the protruding pattern is a small radius of curvature pattern, and a portion of the concave portion adjacent to the protruding pattern has a radius of curvature greater than a radius of curvature of the small radius of curvature pattern. The touch panel of claim 1, wherein the first conductive electrode extends along a first direction, and the second conductive electrode extends along a second direction, and the first direction is non-parallel In the second direction, the first conductive electrode and the second conductive electrode intersect each other and are insulated. The touch panel of claim 6, wherein the first conductive electrode comprises at least two recesses, and the The two recesses respectively correspond to opposite sides of the second conductive electrode. The touch panel of claim 7, wherein a distance between the two recesses on both sides of the second conductive electrode ranges from about 1.2 mm to about 7.8 mm. The touch panel of claim 6, wherein the first conductive electrode comprises a plurality of electrode pads and a plurality of connecting portions, each of the connecting portions being located between the adjacent two of the electrode pads for electrically connecting the same strip The electrode pads of the first conductive electrode, the width of the connecting portions is smaller than the width of the electrode pads, and at least one of the connecting portions is located at the first conductive electrode and the second conductive electrode The intersection of the connection portion and the width of the second conductive electrode are substantially the same. The touch panel of claim 9, wherein the electrode pads are hexagonal or rhomboid-like in shape, and the connecting portions are rectangular in shape. The touch panel of claim 9, wherein the connecting portions are rectangular in shape, and the shape of the electrode pads comprises an "E" shape, and each of the electrode pads comprises a main portion, and the shape of the main portion is A rectangle, and the long side of the rectangle is disposed along the second direction. The touch panel of claim 11, wherein the distance between the main portion and the second conductive electrode adjacent thereto is from about 200 micrometers to about 300 micrometers. The touch panel of any one of claims 9 to 11, further comprising at least one dummy electrode, the dummy electrode at least partially overlapping the second conductive electrode in a vertical projection direction, and the dummy electrode is located Between the two adjacent electrode pads of the same first conductive electrode. The touch panel of claim 13, wherein the dummy electrode has a trapezoidal shape, a rectangular shape, a rhombus-like shape, a hexagonal shape, a "T"-shaped pattern, or an "I"-shaped pattern. The touch panel of claim 13, wherein a distance between the dummy electrode and the first conductive electrode adjacent thereto is less than or equal to about 30 micrometers. The touch panel of claim 1, wherein the first conductive electrode is formed by a layer of conductive material, and the recess is an opening extending through the conductive material layer. The touch panel of claim 1 further comprising at least one compensation electrode disposed in the recess, and the compensation electrode and the first conductive electrode are formed of the same material layer. The touch panel of claim 17, wherein the distance between the compensation electrode and the first conductive electrode is less than or equal to about 30 micrometers. The touch panel of claim 1, wherein the size of the recess is less than or equal to about 30 micrometers. The touch panel of claim 1, wherein the shape of the recess is a cloud shape, a lucky grass shape or an "H" shape. The touch panel of claim 1, wherein the recess is a blind hole.