TW201303680A - Capacitive touch panel with mesh electrodes - Google Patents

Abstract

The present invention discloses a capacitive touch panel with mesh electrodes, comprising a first electrode and a second electrode that are made of transparent conductive material and disposed orthogonally in no contact. In particular, at least one electrode in the first and the second electrodes includes at least two sub-electrode plates. All sub-electrode plates in one electrode are arranged according to the mesh structure, that is to say, at least the processing of one electrode in the first and the second electrode has at least one grid, and each grid is surrounded by their surrounding sub-electrode plates. Through the mesh electrode, this invention replaces the concentration distributed capacitance of the existing technology with dispersion distributed capacitance to allow the touch panel, even in the suspended state, to ensure higher effective permittivity. It improves the waterproof performance of touch panel and also enhances the anti ESD and anti aging performances of the capacitive touch panel.

Description

Capacitive touch panel with mesh electrodes

The invention relates to a device for converting touch information of a screen into an electrical signal reflecting a touch position or a force, in particular, a capacitor is used as a medium to convert the touch information into an electrical signal reflecting the touch position. Device.

The touch panel of the prior art has various implementation principles, including a resistive touch panel, a capacitive touch panel, a surface infrared touch panel, and the like. Among them, the capacitive touch panel is popular among the public because of its high light transmittance, wear resistance, resistance to changes in ambient temperature and humidity, long life, and advanced complex functions such as multi-touch. The use of capacitance changes as a sensing principle has been around for a long time. In order for the touchpad to work effectively, a transparent capacitive sensing array is required. When the human body approaches or touches the electrode of the capacitor, the magnitude of the capacitance detected by the control circuit is changed. According to the distribution of the capacitance change value on the screen, the touch can be judged. According to the manner in which the capacitor is formed, the touch panel includes a self-capacitive touch panel and a mutual capacitive touch panel. The self-capacitive touch panel reflects the touch position by using a capacitance change formed by the electrode and a DC level electrode; the mutual capacitance type touch panel reflects the touch position by using a capacitance change formed by the two electrodes. The prior art measures the performance of a capacitive touch panel by an effective permittivity, which is the ratio of the maximum amount of change in capacitance to the value of capacitance when there is no touch due to touch on the touch panel.

At present, the capacitive touch panel has a very rich plate structure, generally having a diamond-shaped electrode and a rectangular electrode. However, as far as the board itself is concerned, no matter what kind of pattern, the capacitive touch panel basically detects the ordinate of the touch position by the electrode disposed laterally, and detects the abscissa of the touch position by the electrode arranged in the longitudinal direction. Taking the mutual-capacitive touch panel of the prior art as an example, the electric field formed between the electrodes is as shown in FIG. 20, and the electric field line distribution principle shows that when there are potential differences between the two electrodes 100' and 200', the two electrodes The surface of the 100', 200' surface is closest to the surface, the surface electric field intensity is the largest, and the electric field line is denser. As the distance between the surfaces of the two electrodes 100' and 200' is increased, the electric field strength is decreased, and the electric field line is correspondingly coming. The more sparse, the more the electric field line length and curvature will increase. Accordingly, a portion of the electric field lines will pass through the electrode protection film 900' by the drive electrode 100' and then return to the sensing electrode 200'. We refer to the very dense electric field lines in the electrode protection film 900' as short-range electric field lines, and the formed capacitance is called short-range capacitance; the electric field line that penetrates through the electrode protection film is called long-range electric field line, and the formed capacitance is called For long-range capacitors. As described above, the touch of the human body or the dedicated touch device 800' on the touch panel changes the distribution of the original electric field lines. As shown in FIG. 21, when the human body or the dedicated touch device 800' touches the touch panel, the original portion of the touch panel passes through the electrode protection film 900' through the electrode protection film 900' into the air and then passes through the touch panel. The electrode protection film 900' returns to the weak electric field line on the sensing electrode 200', that is, the long-range electric field line, which is absorbed by the human body or the special touch device 800', and then transmitted to the ground; some short-range electric field lines are also The touch device 800' absorbs, reducing the coupling to the sensing electrode 200'. Therefore, the electric field line from the driving electrode 100' back to the sensing electrode 200' will be reduced, so that the capacitance between the driving electrode 100' and the sensing electrode 200' is reduced, so that the data processing module can easily detect the change. capacitance.

However, the driving electrode pattern and the sensing electrode pattern of the prior art capacitive touch panel are composed of a single pattern, and the electrodes have both short-range capacitance and long-range capacitance. Since the absolute width of the electrode is large, and generally the electrode protection film 900' is thin, the ratio of the long-range capacitance to the total capacitance is very large. When the touchpad is in a floating state, or when a suspended conductor covers the surface of the touchpad, there is a small equivalent capacitance CX between the human body or the dedicated touch device 800' and the ground, as shown in FIG. As shown, the human body or dedicated touch device 800' is like hanging in the air. Compared with the case shown in FIG. 15, when in the floating state, the electric field lines emitted from the driving electrode 100' will pass vertically through the human body or the dedicated touch device 800', and then only a small portion is guided to the ground through the equivalent capacitance CX. Most of the time will be returned to the sensing electrode 200' through the human body or a dedicated touch device 800'. As the contact area of the human body or the dedicated touch device 800' is larger and larger, the electric field line emitted by the driving electrode 100' can be continuously increased through the vertical electric field line of the human body or the special touch device 800', and the equivalent capacitance CX is taken away. The ability of the electric field lines is constant, resulting in a vertical entry into the body or a portion of the electric field lines of the dedicated touch device 800' will return to the sensing electrode 200'. Due to the presence of the human body or the dedicated touch device 800', the long-range electric field line length is shortened, and the short-range electric field line length is increased. The long-range electric field line is shortened, causing an increase in capacitance; the length of the short-range electric field line is increased, resulting in a decrease in capacitance. The effects of long-range electric field line changes and short-range electric field lines are opposite and cancel each other out. If the long-range electric field lines are large and the long-range capacitance accounts for a large proportion of the total capacitance, the overall effect may be that the capacitance does not become smaller, but becomes larger. Therefore, when the touch panel is touched by the human body or the special touch device 800' in the floating state, not only the capacitance between the driving electrode 100' and the sensing electrode 200' is not reduced, but the driving electrode 100' and The capacitance between the sensing electrodes 200' is increased, and finally, the touch panel reflects an insensitive or unresponsive phenomenon in a suspended state. Since the water in nature is not pure water, under normal conditions, the water will be able to conduct electricity. In the case of water on the surface of the touch panel, there is a suspended conductor on the surface of the capacitive panel. Therefore, the surface of the touch panel has The case of water is one of the actual conditions in which the touch panel is suspended. Then, the influence of the above suspended state on the touch panel can reflect the poor waterproof performance of the prior art capacitive touch panel.

In addition, the capacitive touch panel of the prior art mostly solves the insulation problem between the driving electrode and the sensing electrode through the bridge bridging technology of the conductive material. If the bridge material of the conductive material is too large or the width of the bridge is too small, the bridge resistance is too large. When ESD (Electrostatic Discharge) occurs, it will easily cause the bridge across the bridge to be blown due to excessive current, resulting in The board is damaged.

The technical problem to be solved by the present invention is to avoid a disadvantage of the prior art and to provide a capacitive touch panel having a mesh electrode. By improving the electrode structure, the long-range capacitance is reduced, the short-range capacitance is increased, and the capacitance is dispersed and averaged. And improve the performance of the touchpad in the suspended state, improve the waterproof performance of the touchpad, improve the linearity of the touchpad; increase the connection path between the electrodes, reduce the connection resistance between the electrodes, enhance the anti-ESD of the capacitive panel, and resist Aging and other properties.

The technical problem of the present invention can be achieved by adopting the following technical means: designing and manufacturing a capacitive touch panel having a mesh electrode, comprising a first electrode group, a second electrode group and a data processing made of a transparent conductive material Module. The first electrode group includes first electrodes that are parallel to each other, and the second electrode group includes second electrodes that are parallel to each other. Any of the first electrodes and any of the second electrodes are orthogonally arranged in non-contact with each other. The data processing module is configured to emit an excitation signal, detect a capacitance change, and determine a touch position coordinate according to the capacitance detection condition, wherein the first electrode group and the second electrode group are electrically connected to the data processing module. In particular, at least one of the first electrode and the second electrode includes at least two sub-electrode plates, and all of the sub-electrode plates of the same electrode are arranged in a mesh structure, that is, at the first electrode and the second electrode At least one of the electrodes is machined with at least one grid, each grid being formed by a sub-electrode plate of the respective periphery.

The shape of the sub-electrode plate includes at least one of various polygonal, circular, and elliptical shapes. The polygon includes a quadrangle, a regular quadrilateral, a pentagon, a regular pentagon, a hexagon, a regular hexagon, an octagon, and a regular octagon.

In order to further increase the effective permittivity, the position of the grid of the first electrode corresponds to the position of the sub-electrode plate of the second electrode on the entire touch panel, and the position of the sub-electrode plate of the first electrode and the position of the second electrode The positions of the grids correspond to the positions of the grids and the sub-electrode plates of the first electrode and the positions of the sub-electrode plates and the grid of the second electrode, respectively.

The touch panel is a mutual capacitive touch panel. In the first electrode and the second electrode, the electrode that receives the excitation signal from the data processing module is a driving electrode, and is used for feeding back an electrical signal to the data processing module to detect The electrode whose capacitance changes is the sensing electrode.

The electrode may have a layered structure, and the first electrode and the second electrode are each disposed in two mutually parallel planes having a gap.

The electrode may also adopt a same-layer bridge type jumper structure, and the first electrode and the second electrode are disposed in the same plane.

In order to further improve the effective permittivity of the touch panel, the touch panel further includes a secondary electrode made of a transparent conductive material, which is in an electrically floating state. There is no electrical connection between the secondary electrodes and the other electrodes of the secondary electrode and the touch panel. The secondary electrode is disposed in the same plane as the first electrode or the second electrode, or is disposed in parallel with the first electrode or the second electrode.

In order to further improve the effective permittivity of the touch panel, the touch panel further includes a mask electrode made of a transparent conductive material. The mask electrode is electrically connected to the DC power source or directly to the ground. The mask electrode is disposed in the same plane as the first electrode or the second electrode, or is disposed in parallel with the first electrode or the second electrode.

The transparent conductive material includes Indium Tin Oxide, ITO and Antimony Tin Oxide (ATO for short).

Compared with the prior art, the beneficial technical effect of the "capacitive touch panel with mesh electrodes" of the present invention is that the capacitance distribution of the prior art is changed through the mesh electrodes, the short-range capacitance is increased, the long-range capacitance is reduced, and the touch panel is made. Even in the floating state, it ensures a high effective permittivity, improves the waterproof performance of the touch panel, improves the linearity, and enhances the anti-ESD and anti-aging properties of the capacitive panel.

The following is further described in detail in conjunction with the embodiments shown in the drawings.

The present invention provides a capacitive touch panel having a mesh electrode, as shown in FIG. 1 , FIG. 8 , FIG. 11 , FIG. 14 , and FIG. 17 , including a first made of a transparent conductive material. Electrode group 100, second electrode group 200, and data processing module 300. The first electrode group 100 includes first electrodes 110 that are parallel to each other, and the second electrode group 200 includes second electrodes 210 that are parallel to each other. Any of the first electrodes 110 and any of the second electrodes 210 are orthogonally arranged in contact with each other. The transparent conductive material includes Indium Tin Oxide, ITO and Antimony Tin Oxide (ATO for short). The data processing module 300 is configured to generate an excitation signal, detect a change in capacitance, and determine a touch position coordinate according to the capacitance detection condition. The first electrode group 100 and the second electrode group 200 are electrically connected to the data processing module 300. In particular, at least one of the first electrode 110 and the second electrode 210 includes at least two sub-electrode plates 111, 211, and all of the sub-electrode plates 111, 211 of the same electrode 110, 210 are arranged in a mesh structure; In another aspect, at least one of the first electrode 110 and the second electrode 210 is processed with at least one mesh 112, 212, and each of the meshes 112, 212 is surrounded by sub-electrode plates 111, 211 of the respective periphery. .

As shown in Fig. 2, Fig. 3, Fig. 9, and Fig. 10, the first electrode 100 and the second electrode 200 of the first embodiment and the second embodiment of the present invention each adopt a mesh structure. As shown in FIG. 12 and FIG. 13, in the third embodiment of the present invention, the first electrode 100 adopts a mesh structure, and the second electrode 200 is a common flat electrode. Therefore, the present invention only needs to adopt a mesh structure for any one of the first electrode 100 and the second electrode 200, so that an effect of ensuring a higher effective permittivity in the case of floating can be obtained.

The present invention improves the capacitance of the prior art touch panel to be distributed into a capacitively dispersed touch panel, and improves the capacitance between the two electrodes of the prior art into a plurality of small capacitors Cn formed between the two electrodes, that is, This is equivalent to changing the original capacitance C to the sum of the plurality of small capacitors Cn. For the mutual capacitive touch panel, the driving electrode of the entire board is designed as a mesh driving electrode composed of a plurality of basic graphic units, and the sensing electrodes of the board body can also be correspondingly designed as a mesh sensing electrode composed of a basic pattern. The so-called mesh structure, that is, regardless of the sensing electrode 210 or the driving electrode 110, is formed by interlacing and connecting two simple basic patterns on the board body to form an electrode, and the entire board pattern is similar to a mesh shape.

In theory, the electrode is made into a network structure, which is mainly beneficial to increase the short-range coupling effect between the electrodes and reduce the long-range coupling, change the electric field distribution between the electrodes, and enhance the electric field strength; at the same time, due to the use of a dispersed distribution network With the electrode structure, the electric field line distribution between the two electrodes will become more uniform and their coupling will be more sufficient. The first embodiment of the present invention, as shown in FIGS. 5-7, respectively, shows that the touchpad covered with the electrode protection film 900 is not touched, the touchpad is touched, and the touchpad is suspended. Schematic diagram of the electric field distribution of the touched state. From the above figures, it is apparent that the electric field distribution effect is consistent with the above theoretical analysis conclusions. The electric field distribution diagram is also an experimentally validated result. As shown in FIG. 20 to FIG. 22, compared with the prior art touch panel, the electric field line distribution of the distributed distributed electrode structure of the present invention has a large reduction in short-range capacitance and a small increase in long-range capacitance in a floating state, so that the present invention touches When the control board is in the floating state, the rate of change of the touch capacitance is still relatively large, and the touch action can still be recognized. As shown in Fig. 22, when the common capacitive panel is suspended and suspended, the long-range electric field line is shortened to the distance of the sensing electrode from the driving electrode through the human body or a dedicated touch device, thereby shortening the distance between the two coupling electrodes. The coupling capacitance between the two electrodes is increased; the short-range electric field line increases the distance, which is equivalent to increasing the distance between the two coupling electrodes, thereby reducing the coupling capacitance between the two electrodes. Under the same conditions, the coupling between the capacitors of the dispersed and distributed capacitive touch panel of the present invention is mainly composed of short-range coupling. In the suspended state, although the coupled electric field lines are mostly returned from the driving electrode to the sensing electrode, the short-range coupling is dominant. Under the circumstance, the increase of the short-circuit coupled electric field line causes the capacitance reduction to be much larger than the increase of the capacitance caused by the decrease of the long-range coupled electric field line. Therefore, the total capacitance is significantly reduced. In contrast, it is better to ensure the rate of change of the touch capacitance between the first electrode and the second electrode in the suspended state. It has been experimentally proved that the mesh electrode structure of the present invention is advantageous for improving the touch sensing effect of the panel in a suspended state.

When there is water on the touch panel body of the present invention, the water at this time is similar to a suspended conductor. As described above, the coupling capacitance between the two electrodes of the prior art touch panel will be significantly increased by the water, so that the rate of change of the capacitance caused by the touch of the human body or the dedicated touch device 800 will become smaller. The dispersion-dispersed mesh electrode touch panel of the present invention can effectively utilize the coupling area between the first electrode 110 and the second electrode 210, and the coupling between the first electrode 110 and the second electrode 210 when there is water. The capacitance increment is relatively small, so the change rate of the capacitance of the human body or the special touch device 800 is larger than that of the prior art touch panel. Therefore, the touch panel of the distributed distributed mesh electrode structure of the present invention has superior waterproof performance. performance.

At the same time, since the touch panel of the present invention adopts a network-distributed structure, when there is electrostatic discharge ESD, the mesh distribution can effectively release static electricity through the structure of the mesh connection, thereby effectively improving the resistance of the board body. ESD capabilities.

It has been proved by experiments that the waterproof performance and the dangling performance of the mesh-shaped distribution plate body are obviously better than the concentrated distribution plate body, and generally at least 20% of the performance can be improved.

The specific structure of the first electrode 110 and the second electrode 210 may be various, and is specifically described below through three embodiments.

In the third embodiment of the present invention, as shown in FIGS. 11 to 13, the first electrode 110 adopts a mesh structure, and the second electrode 210 employs a flat electrode. That is to say, in order to achieve the effect of dispersing the distributed capacitance, it is not required that the first electrode 110 and the second electrode 210 are both mesh structures, and as long as one of them is a mesh structure, the effect of dispersing the distributed capacitance can be achieved. More specifically, the first electrode 110 is formed by a rectangular grid 112, which may be considered to be surrounded by a plurality of rectangular sub-electrode plates 111 at its periphery. Therefore, the first electrode 110 of the third embodiment of the present invention belongs to a mesh structure electrode composed of a single-shaped sub-electrode plate 111, and the sub-electrode plate 111 can adopt various polygonal, circular or elliptical shapes.

According to the fourth embodiment of the present invention, as shown in FIGS. 14 to 16, the first electrode 110 is a mesh structure, and the second electrode 210 is a flat electrode. The first electrode 110 is in a variety of grid forms to further enhance the effect of dispersing the distributed capacitance.

According to the fifth embodiment of the present invention, as shown in FIGS. 17 to 19, the first electrode 110 is a mesh structure, and the second electrode 210 is a flat electrode. The first electrode 110 is also in a plurality of mesh forms, except that the specific shape and arrangement of the mesh are different from the fourth embodiment, and the ultimate goal is to further improve the effect of dispersing the distributed capacitance.

According to a second embodiment of the present invention, as shown in Figs. 8 to 10, the first electrode group 100 is composed of three longitudinally extending first electrodes 110, and the second electrode group 200 is composed of two laterally extending second electrodes. The electrode 210 is constructed. The first electrode 110 and the second electrode 210 are both mesh structures. Each of the first electrodes 110 is composed of two columns of rhombic sub-electrode plates 111. After each of the sub-electrode plates 111 constitutes a mesh structure, a columnar diamond-shaped mesh 112 is formed in the middle. Each of the second electrodes 210 is also composed of two transverse rows of diamond-shaped sub-electrode plates 211. After each of the sub-electrode plates 211 constitutes a mesh structure, a transverse diamond-shaped grid 212 is formed in the middle portion. Therefore, in the second embodiment of the present invention, the first electrode 110 and the second electrode 210 respectively belong to a mesh structure electrode composed of a single-shaped sub-electrode plates 111 and 211, and the sub-electrode plates 111 and 211 can adopt various polygons and circles. Or oval.

According to a first embodiment of the present invention, as shown in FIGS. 1 to 3, the first electrode group 100 is composed of three longitudinally extending first electrodes 110, and the second electrode group 200 is composed of three laterally extending second electrodes. The electrode 210 is constructed. The first electrode 110 and the second electrode 210 are both mesh structures. Each of the first electrodes 110 is composed of two columns of rhombic sub-electrode plates 111. After each of the sub-electrode plates 111 constitutes a mesh structure, a columnar diamond-shaped mesh 112 is formed in the middle. Each of the second electrodes 210 is composed of two rhombic and hexagonal sub-electrode plates 211 which are alternately arranged in two horizontal rows. After each of the sub-electrode plates 211 constitutes a mesh structure, a transverse diamond-shaped mesh 212 is formed in the middle portion. In the first embodiment of the present invention, the sub-electrode plates 111, 211 are all shown with hatching of transparent material to the regional molecular electrode plates 111, 211 and the grids 112, 212. In the first embodiment of the present invention, the first electrode 110 belongs to a mesh structure electrode composed of a single-shaped sub-electrode plate 111, and the second electrode 210 belongs to a mesh structure electrode composed of a plurality of sub-electrode plates 211 having different shapes. The sub-electrode plate 111 may be polygonal, circular or elliptical; the sub-electrode plate 211 may adopt a combination of any two of various polygonal, circular or elliptical shapes. Obviously, the sub-electrode plate 211 may adopt various polygons. A combination of any of a variety of shapes, round or elliptical.

In the present invention, the various polygons include a quadrangle, a regular quadrilateral, a pentagon, a regular pentagon, a hexagon, a regular hexagon, an octagon, and a regular octagon.

In order to increase the effective permittivity of the touch panel, the position of the mesh 112 of the first electrode 110 corresponds to the position of the sub-electrode plate 211 of the second electrode 210 on the entire touch panel, and the sub-electrode 110 The position of the electrode plate 111 corresponds to the position of the mesh 212 of the second electrode 210, that is, the positions of the mesh 112 and the sub-electrode plate 111 of the first electrode 110 and the sub-electrode plate 211 and the mesh 212 of the second electrode 210, respectively. Position complementary configuration. The above structure has no opposing electrode plates between the first electrode 110 and the second electrode 210, thereby increasing the variable electric field strength between the first electrode and the second electrode, that is, increasing the capacitance variation, thereby improving the The effective permittivity of the touchpad. As a preferred means, the three embodiments of the present invention employ the above complementary structure.

The first electrode 110 and the second electrode 210 of the present invention are only distinguished in structural form, that is, one of the electrodes is used for lateral layout, and the other electrode is disposed longitudinally, so that the two electrodes can conform to the orthogonal relationship. The first electrode 110 and the second electrode 210 are not distinguished from the completed functional point of view. Therefore, if the touch panel is a mutual capacitive touch panel, in the first electrode 110 and the second electrode 210, the electrode that receives the excitation signal from the data processing module 300 is a driving electrode for data processing. The electrode that the module 300 feeds back the electrical signal to detect the change in capacitance is the sensing electrode.

The touch panel of the present invention may adopt a layered structure, and the first electrode 110 and the second electrode 210 are each disposed in two mutually parallel planes having a gap. The touch panel of the present invention can also adopt a single layer structure, and the first electrode 110 and the second electrode 210 are disposed in the same plane. When a single layer structure is employed, attention should be paid to the non-contact orthogonal configuration between the first electrode 110 and the second electrode 210, that is, the intersection of the first electrode 110 and the second electrode 210 is to be bridged by a conductive material. Can't touch. The first embodiment of the present invention adopts a single layer structure, and FIG. 4 shows a capacitor unit formed by orthogonally forming the first electrode 110 and the second electrode 210. Therefore, the intersection of the first electrode 110 and the second electrode 210 should be bridged. Crossover technology.

In addition, in order to further enhance the degree of coupling between the first electrode 110 and the second electrode 210 and increase the effective permittivity, the touch panel of the present invention further includes a secondary electrode made of a transparent conductive material in an electrically suspended state. There is no electrical connection between the secondary electrodes and the other electrodes of the secondary electrode and the other modules of the touch panel, that is, the secondary electrodes are in an electrically floating state. The secondary electrode realizes electric field relaying between the first electrode 110 and the second electrode 210, and increases the variable electric field strength between the first electrode 110 and the second electrode 210. The secondary electrode is disposed in the same plane as the first electrode 110 or the second electrode 210, or is disposed in parallel with the first electrode 110 or the second electrode 210.

The touch panel of the present invention further includes a mask electrode made of a transparent conductive material. The mask electrode is electrically connected to the DC power source or directly to the ground. The mask electrode can reduce the inherent electric field strength between the first electrode 110 and the second electrode 210, thereby increasing the variable electric field strength between them to improve the effective permittivity of the touch panel. The intrinsic electric field strength refers to the field strength of an electric field formed between the two electrodes that is not easily affected by the external electrodes. The mask electrode is disposed in the same plane as the first electrode 110 or the second electrode 210, or is disposed in parallel with the first electrode 110 or the second electrode 210.

100. . . First electrode group

100'. . . Drive electrode

110. . . First electrode

111. . . Sub-electrode plate

112. . . grid

200. . . Second electrode group

200'. . . Sensing electrode

210. . . Second electrode

211. . . Sub-electrode plate

212. . . grid

300. . . Data processing module

800. . . Touch device

800'. . . Touch device

900. . . Electrode protective film

900'. . . Electrode protective film

A. . . Indication section

Cx. . . Equivalent capacitance

Fig. 1 is a schematic view showing the electrical principle of the first embodiment of the "capacitive touch panel having a mesh electrode" of the present invention.

Fig. 2 is a plan view showing the planar structure of the first electrode 110 of the first embodiment.

Fig. 3 is a plan view showing the planar structure of the second electrode 210 of the first embodiment.

Fig. 4 is a partially enlarged schematic view showing the portion indicated by A in Fig. 1.

Fig. 5 is a schematic view showing the electric field distribution of the first embodiment.

FIG. 6 is a schematic diagram of electric field distribution in the case where the human body or the dedicated touch device 800 is touched by the first embodiment.

FIG. 7 is a schematic diagram of an electric field distribution in which the first embodiment is in a floating state and is touched by a human body or a dedicated touch device 800.

Figure 8 is a schematic view of the electrical principle of the second embodiment of the present invention.

Fig. 9 is a plan view showing the planar structure of the first electrode 110 of the second embodiment.

Fig. 10 is a plan view showing the planar structure of the second electrode 210 of the second embodiment.

Figure 11 is a schematic view showing the electrical principle of the third embodiment of the present invention.

Fig. 12 is a plan view showing the planar structure of the first electrode 110 of the third embodiment.

Fig. 13 is a plan view showing the planar structure of the second electrode 210 of the third embodiment.

Figure 14 is a schematic view showing the electrical principle of the fourth embodiment of the present invention.

Fig. 15 is a plan view showing the planar structure of the first electrode 110 of the fourth embodiment.

Fig. 16 is a plan view showing the planar structure of the second electrode 210 of the fourth embodiment.

Figure 17 is a schematic view showing the electrical principle of the fifth embodiment of the present invention.

Fig. 18 is a plan view showing the planar structure of the first electrode 110 of the fifth embodiment.

Fig. 19 is a plan view showing the planar structure of the second electrode 210 of the fifth embodiment.

Figure 20 is a schematic diagram showing the electric field distribution of the prior art capacitive touch panel.

Figure 21 is a schematic diagram showing the electric field distribution of the prior art capacitive touch panel when touch occurs.

Figure 22 is a schematic diagram showing the electric field distribution of the prior art capacitive touch panel when it is in a suspended state and is touched by a human body or a dedicated touch device 800'.

100. . . First electrode group

110. . . First electrode

200. . . Second electrode group

210. . . Second electrode

300. . . Data processing module

A. . . Indication section

Claims (10)

A capacitive touch panel having a mesh electrode, comprising: a first electrode group (100) made of a transparent conductive material, a second electrode group (200); and a data processing module (300); the first The electrode group (100) includes first electrodes (110) parallel to each other, the second electrode group (200) including second electrodes (210) parallel to each other; any first electrode (110) and any second electrode ( 210) orthogonally disposed in contact with each other; the data processing module (300) is configured to emit an excitation signal, detect a capacitance change, and determine a touch position coordinate according to the capacitance detection condition, the first electrode group (100) and the second electrode The group (200) is electrically connected to the data processing module (300); wherein at least one of the first electrode (110) and the second electrode (210) comprises at least two sub-electrode plates (111, 211), all of the sub-electrode plates (111, 211) in the same electrode (110, 210) are arranged in a mesh structure, that is, at least in the first electrode (110) and the second electrode (210) An electrode is machined with at least one grid (112, 212) surrounded by sub-electrode plates (111, 211) of respective perimeters. The capacitive touch panel having a mesh electrode according to claim 1, wherein the shape of the sub-electrode plate (111, 211) includes at least one of various polygons, a circle, and an ellipse. The capacitive touch panel having a mesh electrode according to claim 2, wherein the polygon comprises a quadrangle, a regularogram, a pentagon, a regular pentagon, a hexagon, a regular hexagon, and an octagon Shape, regular octagon. The capacitive touch panel having a mesh electrode according to claim 1, wherein the position of the grid (112) of the first electrode (110) and the second electrode are on the entire touch panel. The position of the sub-electrode plate (211) of (210) corresponds to the position of the sub-electrode plate (111) of the first electrode (110) corresponding to the position of the grid (212) of the second electrode (210), that is, the The positions of the grid (112) and the sub-electrode plates (111) of one electrode (110) are respectively arranged to be complementary to the positions of the sub-electrode plates (211) and the grid (212) of the second electrode (210). The capacitive touch panel having a mesh electrode according to claim 1, wherein the touch panel is a mutual capacitive touch panel, and the first electrode (110) and the second electrode (210) The electrode receiving the excitation signal from the data processing module (300) is a driving electrode, and the electrode for feeding back the electrical signal to the data processing module (300) to detect the capacitance change is the sensing electrode. The capacitive touch panel having a mesh electrode according to claim 1, wherein the first electrode (110) and the second electrode (210) are respectively disposed on two mutually parallel planes having a gap Inside. The capacitive touch panel having a mesh electrode according to claim 1, wherein the first electrode (110) and the second electrode (210) are disposed in the same plane. The capacitive touch panel having a mesh electrode according to claim 1, further comprising a dummy electrode made of a transparent conductive material, which is in an electrically suspended state; between the secondary electrodes, and the The secondary electrode is not electrically connected to other modules of the touch panel; the secondary electrode is disposed in the same plane as the first electrode (110) or the second electrode (210), or is coupled to the first electrode (110) or the second electrode (210) is arranged in parallel. The capacitive touch panel having a mesh electrode according to claim 1, further comprising a mask electrode made of a transparent conductive material; the mask electrode is electrically connected to the DC power source, or directly grounded The mask electrode is disposed in the same plane as the first electrode (110) or the second electrode (210), or is disposed in parallel with the first electrode (110) or the second electrode (210). The capacitive touch panel having a mesh electrode as described in claim 1, 8 or 9, wherein the transparent conductive material comprises indium tin oxide (ITO) and antimony tin oxide (ATO).