JP3186782U - Electrode structure and capacitance sensor having the electrode structure - Google Patents

Abstract

An electrode structure having a high capacitance detection capability of a touch panel and a capacitance sensor including the electrode structure are provided.
An electrode structure includes a plurality of conductive thin wires, and a plurality of thin wire portions, a plurality of sensitive portions, and a plurality of crossing portions are formed on each of the thin wires. The part, the sensitive part and the crossing part form a mesh pattern. Each sensitive part is located between two corresponding crossing parts, and both ends of each sensitive part are connected to the two crossing parts via two corresponding thin wire parts. The shape of the sensitive part is a geometric figure having a short axis and a long axis, the long axis is extended in the direction of the corresponding thin line part, and the width of the short axis is larger than the width of the corresponding thin line part. The capacitance sensor includes two layers of the electrode structure, and the first layer electrode and the sensitive portion of the second layer electrode are formed to be insulated and superimposed on each other.
[Selection] Figure 3

Description

  The present invention relates to an electrode structure used in a capacitor-type touch panel, and more particularly to a mesh electrode structure and a capacitance sensor made of fine metal wires.

  In known touch panels, the electrodes are usually formed of indium tin oxide (ITO) so as not to see the electrodes. However, as the touch panel area gradually grows in size, electrodes using indium tin oxide have some disadvantageous factors, such as high impedance and slow touch response speed. For this reason, the related contractor has already tried to construct an electrode with a thin metal wire. Please refer to FIG. In order to make it difficult to see the thin metal wire, the metal must be manufactured to have an extremely fine line width. However, since the capacitance sensitive area becomes too small for that purpose, there is a problem that it is difficult to detect a changing capacitance value. Therefore, according to a well-known technique, a touch panel using metal fine wires as electrodes has a universally insufficient touch position detection capability, which results in poor touch control sensitivity and accuracy.

  The inventor of the present invention has created a kind of electrode structure and a capacitance sensor including the electrode structure in order to improve it in view of the well-known drawbacks of the electrode composed of a thin metal wire. I thought about solving the shortcomings.

  An object of the present invention is to provide a kind of electrode structure so that the capacitance detection capability of a touch panel can be enhanced.

  In order to achieve the above-described object of the present invention, the present invention provides a kind of electrode structure, which is used in a capacitor-type touch panel and includes a plurality of conductive thin wires, each of which is on one thin wire. A plurality of fine wire portions, a plurality of sensitive portions, and a plurality of crossing portions are formed, and these thin wire portions, the sensitive portions, and the crossing portions form a mesh pattern. The characteristic is that each sensitive part is located between two corresponding crossing parts, and both ends of each sensitive part are connected to two corresponding crossing parts via two corresponding thin line parts, and The shape of the sensitive part is a geometric figure having a short axis and a long axis, and the long axis is extended in the direction of the corresponding thin line part, and the width of the short axis is larger than the width of the corresponding thin line part. is there.

  The present invention further provides a kind of capacitance sensor, which is used in a capacitor-type touch panel, and includes a first electrode including a plurality of conductive first fine wires and a plurality of conductive second thin wires. A plurality of first thin wire portions, a plurality of first sensitive portions, and a plurality of first crossing portions are formed in each of the first thin wires, and a plurality of first thin wire portions are formed in each of the second thin wires. A second thin line portion, a plurality of second sensitive portions, and a plurality of second crossing portions are formed, wherein each of the first sensitive portions of the first electrode corresponds to each of the second sensitive portions of the second electrode. Insulated and superimposed on each other.

  The electrode structure of the present invention is used in a capacitor-type touch panel, and can sufficiently enhance the capacitance detection capability of the capacitor-type touch panel.

It is a display figure of the known electrode structure of a capacitor type touch panel. 1 is a structural diagram of an electrode structure of a first embodiment of a capacitor-type touch panel according to the present invention. FIG. 3 is an enlarged structural view of a local portion of the electrode structure of FIG. 2. FIG. 4 is a structural diagram of an electrode structure of a second embodiment of the capacitor-type touch panel according to the present invention. FIG. 6 is a structural diagram of an electrode structure of a third embodiment of the capacitor-type touch panel according to the present invention. It is a structural diagram of the electrode structure of the fourth embodiment of the capacitor-type touch panel of the present invention. 1 is a structural diagram of a capacitive sensor of a condenser touch panel according to the present invention. FIG. 8 is an enlarged structural view of a local part of the capacitance sensor of FIG. 7. FIG. 3 is a structural diagram in which a first electrode and a second electrode of a capacitance sensor of the present invention are formed on a single transparent substrate. FIG. 3 is a structural diagram in which a first electrode and a second electrode of a capacitance sensor of the present invention are formed on two transparent substrates, respectively.

  The technical contents, structural features, objects to be achieved, and operational effects of the present invention will be described in detail with reference to examples and drawings.

  Please refer to FIGS. 2 to 3 of the present invention. The electrode structure 1 of the present invention can be applied to a capacitor-type touch panel, and is applied to, for example, a flat panel display, a notebook computer, a tablet PC, a smartphone or the like having the above-described capacitor-type touch panel. The electrode structure 1 of the present invention includes a plurality of conductive thin wires 10 and one mesh pattern 2 formed by intersecting these thin wires 10, and the mesh pattern 2 described above includes a plurality of lattices 2a. It is.

  In the present invention, a plurality of thin wire portions 10a, a plurality of sensitive portions 10b, and a plurality of crossing portions 10c are formed on the thin wire 10, and the thin wire portions 10a, the sensitive portions 10b, and the crossing portions 10c are provided with the above-described mesh pattern 2. Form. As shown in FIG. 3, one lattice 2a of the mesh pattern 2 is surrounded by four crossing portions 10c, four sensitive portions 10b, and eight crossing portions 10c. That is, the thin wire 10 has conductive physical properties, and the thin wire 10 can adopt a metal conductive material, such as copper, aluminum, nickel, iron, gold, silver, stainless steel, tungsten, chromium, titanium, and alloys thereof. It will be either.

  The installation position of each sensitive part 10b is between two corresponding crossing parts 10c, for example, an intermediate position between the two crossing parts 10c described above. Both ends of each of the sensitive parts 10b described above are connected to the corresponding crossing part 10c via the corresponding thin line part 10a.

  In order to enhance the capacitance detection capability and make the capacitor-type touch panel even better, the present invention improves the shape of the sensitive part 10b and provides the sensitive part 10b with a relatively large detection area. The shape of the sensitive part 10b of the present invention is a geometrical figure having a major axis A and a minor axis B. The major axis A is longer than the minor axis B, and the major axis A corresponds. The width Wa of the minor axis B is extended in the direction of the thin wire portion 10a, and is larger than the width Wb of the thin wire portion 10a. As a specific example of the width Wa and the width Wb, for example, Wb * 1.1 ≦ Wa ≦ Wb * 1.8 is adopted.

  Assuming that the length of the major axis A of the sensitive portion 10b is L1, and the side length of each lattice 2a of the mesh pattern 2 is L2, the present invention is a specific example of L2 * 0.08 ≦ L1 ≦ L2 * 0.1. Specific embodiments can be employed.

  For example, an elliptical shape, a rhombus shape, or a rectangular shape can be adopted as the shape of the sensitive portion 10b. In the overlapping position where the two thin wires 10 cross each other, that is, a crossing portion 10c is formed. The line shape of the thin line portion 10a can be a straight line or an arc line, and the width of the thin line portion 10a can be between 3 μm and 8 μm.

  An elliptical shape can be adopted as the geometric shape of the sensitive portion 10b of the electrode structure 1 of the first embodiment described above, and a short straight line can be adopted as the shape of the thin wire portion 10a. Please refer to FIG. A rhombus is adopted as the geometric shape of the sensitive portion 10b of the electrode structure 1 of the second embodiment of the present invention, and a short straight line is adopted as the shape of the thin wire portion 10a. Please refer to FIG. An elliptical shape is adopted as the geometric shape of the sensitive portion 10b of the electrode structure 1 of the third embodiment of the present invention, and a short arc line is adopted as the shape of the thin wire portion 10a. See FIG. A rhombus is employed as the geometric shape of the sensitive portion 10b of the electrode structure 1 of the fourth embodiment of the present invention, and a short arc line is employed as the shape of the thin wire portion 10a.

  Next, how the electrode structure 1 described above is realized in the capacitance sensor 3 will be described. Please refer to FIGS. The capacitance sensor 3 of the present invention includes a first electrode 31 and a second electrode 33, each first sensitive portion 31 b located on the first electrode 31, and each corresponding second located on the second electrode 33. The sensitive parts 33b are insulated and overlapped with each other. The first electrode 31 and the second electrode 33 in FIGS. 7 and 8 are formed on the upper and lower surfaces of the transparent substrate 3a.

  The first electrode 31 includes a plurality of conductive thin first wires 311, the first thin wire 311 has the same structure as the thin wire 10 described above, and each first thin wire 311 includes a plurality of first thin wire portions 31 a. A plurality of first sensitive portions 31b and a plurality of first crossing portions 31c are formed. The first thin wire portion 31a, the first sensitive portion 31b, and the first crossing portion 31c have the same structure as the thin wire portion 10a, the sensitive portion 10b, and the crossing portion 10c, respectively.

  The second electrode 33 includes a plurality of conductive thin second wires 331, the second thin wire 331 has the same structure as the thin wire 10 described above, and each second thin wire 331 includes a plurality of second thin wire portions 33a. A plurality of second sensitive portions 33b and a plurality of second crossing portions 33c are formed. The second fine wire portion 33a, the second sensitive portion 33b, and the second crossing portion 33c have the same structure as the fine wire portion 10a, the sensitive portion 10b, and the crossing portion 10c, respectively.

  Please refer to FIG. The first electrode 31 is located above the second electrode 33, and each first sensitive part 31b is mutually insulated and overlapped with the corresponding second sensitive part 33b below the first electrode 31, and forms a pair. . The pair of the first sensitive part 31b and the second sensitive part 33b form a single capacitor, and due to the shape design of the sensitive part of the present invention, the sensitive part has a relatively large detection area. The capacity detection capability has been increased.

  Please refer to the structural display diagram of the first embodiment of the capacitance sensor 3 of the present invention in FIG. The first electrode 31 (not shown) and the second electrode 33 (not shown) of the present invention are formed on the upper surface 4a and the lower surface 4b of one transparent substrate 4, respectively. Please refer to the structural diagram of the second embodiment of the capacitive sensor 3 of the present invention shown in FIG. The first electrode 31 (not shown) of the present invention is formed on the surface 5 a of the transparent substrate 5, and the second electrode 33 (not shown) is formed on the surface 7 a of another transparent substrate 7.

  Therefore, the present invention has novelty, inventive step, and industrial utility value, and there is no doubt that it meets the requirements for utility model registration, and it is up to the application here.

  It should be noted that the above is only a description of a preferred embodiment of the present invention, and is not intended to limit the present invention, and other modifications or substitutions of equivalent effects that can be completed without departing from the spirit of the present invention. These are all within the scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 1 Electrode structure 2 Reticulated pattern 2a Grid 3 Capacitance sensor 3a Transparent substrate 4, 5, 7 Transparent substrate 4a Upper surface 4b Lower surface 5a Surface 7a Surface 10 Fine wire 10a Fine wire portion 10b Sensing portion 10c Crossing portion 31 First electrode 33 1st electrode 33 2 electrode 31a 1st thin wire | line part 31b 1st sensitive part 31c 1st crossover part 311 1st fine wire 33a 2nd thin wire | line part 33b 2nd sensitive part 33c 2nd crossover part 331 2nd fine wire

Claims (10)

An electrode structure used for a capacitor-type touch panel,
A plurality of conductive thin wires are included, and a plurality of thin wire portions, a plurality of sensitive portions and a plurality of crossing portions are formed on each one thin wire, and the thin wire portions, the sensitive portions and the crossing portions are meshed. In the above electrode structure forming a pattern,
Each sensitive part is located between the two corresponding crossing parts, and both ends of each sensitive part are connected to the corresponding crossing parts via the corresponding thin line parts, and The shape is a geometric figure having a short axis and a long axis, and the long axis is extended in the direction of the corresponding thin line portion, and the width of the short axis is larger than the width of the corresponding thin line portion. , Electrode structure. In the electrode structure according to claim 1, when the width of the short axis is Wa and the width of the corresponding thin line portion is Wb,
An electrode structure, wherein Wb * 1.1 ≦ Wa ≦ Wb * 1.8. In the electrode structure according to claim 1, when the length of the long axis of the sensitive portion is L1, and each lattice side length of the mesh pattern is L2,
An electrode structure, wherein L2 * 0.08 ≦ L1 ≦ L2 * 0.1.   2. The electrode structure according to claim 1, wherein the shape of the sensitive portion is an ellipse, a diamond, or a rectangle.   2. The electrode structure according to claim 1, wherein the shape of the thin line portion is a straight line or an arc line.   2. The electrode structure according to claim 1, wherein the width of the thin line portion is between 3 [mu] m and 8 [mu] m.   2. The electrode structure according to claim 1, wherein the material of the thin wire is any one of copper, aluminum, nickel, iron, gold, silver, stainless steel, tungsten, chromium, titanium, and an alloy thereof. , Electrode structure. In the capacitance sensor used for the capacitor type touch panel,
A first electrode including a plurality of conductive first fine wires;
A second electrode including a plurality of conductive second fine wires;
A plurality of first thin wire portions, a plurality of first sensitive portions, and a plurality of first sensitive portions each having the same structure as the thin wire portion, the sensitive portion, and the crossing portion of the electrode structure according to claim 1. Crossing portions are formed, and each of the second thin wires has a plurality of second thin wire portions, a plurality of second sensitive portions, and a plurality of second sensitive portions having the same structure as the thin wire portions, the sensitive portions, and the crossing portions of the electrode structure according to claim 1 A second intersection is formed,
Each of the first sensitive portions of the first electrode is overlapped with the corresponding second sensitive portion of the second electrode so as to be insulated from each other.   9. The capacitive sensor according to claim 8, further comprising a transparent substrate, wherein the first electrode is formed on one surface of the transparent substrate, and the second electrode is formed on the other surface of the transparent substrate. A capacitance sensor characterized by being formed. The capacitive sensor of claim 8, further comprising:
A first transparent substrate, wherein the first electrode is formed on one surface of the first transparent substrate;
A second transparent substrate, wherein the second electrode is formed on one surface of the second transparent substrate;
A capacitance sensor.

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