JP3144241U - Condenser touch pad - Google Patents

Abstract

A condenser touch pad with improved sensitivity and accuracy is provided.
A capacitor-type touch pad is formed by superposing a base layer, a sensor layer, and a surface layer to form a transparent plate body. The sensor layer 2 includes a plurality of X-axis traces 21 and Y-axis traces 22 that are arranged in a deterministic manner, and contacts are provided at the front ends of the X-axis traces 21 and Y-axis traces 22, respectively. Are electrically connected to each other and also connected to signal output wiring. A plurality of X-axis traces 21 and Y-axis traces 22 are installed on the same plane. The sensor units on the individual X-axis traces 21 are connected to each other, and the sensor units on the individual Y-axis traces 22 are arranged at intervals. Any two sensor units adjacently arranged on the individual Y-axis trace 22 are interconnected, and the Y-axis trace 22 portion passing between the two adjacently arranged sensor units is insulated.
[Selection] Figure 2

Description

  The present invention provides a capacitor type touch pad in which X-axis and Y-axis sensor traces are arranged on the same plane.

  The structure of a known capacitor-type touch pad is composed of an X-axis sensor layer and a Y-axis sensor layer. The X and Y-axis sensor layers are insulated and installed in the touch pad. Ground and connect to the control circuit. During operation, the capacitor effect occurs at the moment when the user's finger or conductor touches, so the position of the finger or conductor is determined based on the change in the capacitor value. The capacitor-type touch pad can be input with a finger, and the input operation is convenient. The input operation does not need to be touched, and the plate does not suffer from damage caused by repeated stress or deformation. In addition, the structure constituting this type of touchpad is simple, has few parts, has a high product yield, and is suitable for cost reduction by mass production.

  However, since the known capacitor type touchpad has the X-axis and Y-axis sensor traces arranged on two different planes, the X-axis and Y-axis installed on the two different planes in the touchpad production process. When sensor traces are overlapped and combined, there is a disadvantage that positional deviation is likely to occur and the sensitivity and accuracy of the touch pad condensed sensor signal are lowered.

  An object of the present invention is to provide a capacitor type touch pad in which sensor traces in the X-axis direction and the Y-axis direction are arranged on the same plane. Thereby, the arrangement of each sensor trace is accurate, and the sensitivity and accuracy of the touchpad sensor are improved.

  The capacitor-type touchpad according to the present invention includes a base layer, a sensor layer, and a surface layer. Each of the layers is a transparent material, and the layers are bonded and superposed on the basis of order to form a transparent plate body. The sensor layer is provided with a plurality of X-axis traces and Y-axis traces arranged in a deterministic manner, and contacts are provided at the front ends of the X-axis traces and Y-axis traces, respectively. The sensor signal of the capacitor type touch pad is transmitted to the subsequent signal processing circuit through the signal output wiring because it is connected to the signal output wiring. In addition, as a feature, since a plurality of X-axis traces and Y-axis traces are installed on the same plane, each sensor unit on each individual X-axis trace is connected to each other, and each sensor on each individual Y-axis trace is connected. The units are arranged at a distance from each other, and an erection structure is provided between any two sensor units arranged adjacent to each other on each Y-axis trace, and any two of the units arranged adjacent to each other on the Y-axis trace are arranged. The sensor units are interconnected, and the Y-axis trace portion passing between two sensor units arranged adjacent to each other is insulated.

  The erection structure is composed of a coating film and a conductive wire. The covering film is an insulating thin film, and the covering area is at least large enough to cover the X-axis trace portion passing between two sensor units arranged adjacent to each other on the Y-axis trace. In addition, the conductive wire is installed on the upper surface of the coating film, and two ends of the conductive wire are extended to the outside of the coating film to form an electrical connection portion. In the case of combination, a coating film is disposed between two sensor units arranged adjacent to each other on the Y-axis trace, and an X-axis trace portion passing between the two sensor units arranged adjacent to each other is insulated. In addition, the two electrical connection portions of the conductive wires are electrically connected to the two adjacent sensor units, respectively. Thereby, the sensor units on the individual Y-axis traces are electrically connected to each other, and the X-axis sensor trace and the Y-axis sensor trace of the capacitor type touch pad are provided on the same plane.

  In another embodiment, the erection structure is constituted by a covering film and a conductive wire, the covering film is an insulating thin layer, and the covering area is two adjacently arranged on the Y-axis trace. At least a part of the surface of one sensor unit is covered, and at least two through holes are formed on the coating film. The positions of each through hole are exactly the two sensor units arranged adjacent to each other on the Y-axis trace. Correspond. In addition, the conductive wire is installed on the upper surface of the coating film and is spanned between the two through holes. Two ends of the conductive wire are exposed in the two through holes to form an electrical connection. In the case of combination, the coating film is disposed between two sensor units arranged adjacent to each other on the Y-axis trace, and the X-axis trace portion passing between the two sensor units arranged adjacent to each other is insulated. Further, the electrical connection portions at the two ends of the conductive wire pass through the through holes and are electrically connected to the two adjacent sensor units, respectively. Thereby, the sensor units on the individual Y-axis traces are electrically connected to each other, and the X-axis sensor trace and the Y-axis sensor trace of the capacitor type touch pad are arranged on the same plane.

  The condenser touch pad according to the present invention is characterized in that the sensitivity and accuracy of the touch pad sensor are improved because the X-axis and Y-axis sensor traces are arranged on the same plane.

  1 to 3 show a capacitor-type touch pad of a transparent plate body in Embodiment 1 of the present invention. It is mainly composed of a base layer 1, a sensor layer 2, a surface layer 3, and a construction structure 4. Among them, the base layer 1 and the surface layer 3 are insulating thin-layer plate materials having high light transmittance, and are made of glass, polycarbonate (PC), polyethylene terephthalate (PET), methyl methacrylate resin (Polymethylmethacrylate: PMMA). ), A thin film material of a cyclic olefin copolymer. For the sensor layer 2, a transparent conductive thin film such as indium tin oxide or a transparent organic conductive material thin film such as polyethylenedioxythiophene (PEDOT) is selected. The sensor layer 2 is disposed between the base layer 1 and the surface layer 3 and is transparently arranged in the X-axis direction and transparently arranged in parallel with each other, and in the Y-axis direction. Are arranged in parallel and transparent, and the X-axis trace 21 and the Y-axis trace 22 are crossed in a determinant. The sensor units 21a on the individual X-axis traces 21 are interconnected, and the sensor units 22a on the individual Y-axis traces 22 are not connected but are arranged at intervals. The widths of the X-axis trace 21 and the Y-axis trace 22 are generally about 0.05 to 5 mm, the trace contact 24 is provided at the line end of the X-axis trace 21, and the trace contact 25 is provided at the line end of the Y-axis trace 22. The trace contact 24 and the trace contact 25 are electrically connected to the silver conduction path 7a and the silver conduction path 7b at the pad edge, and also connected to the signal output wiring (not shown). Therefore, the sensor signals of the X-axis trace 21 and the Y-axis trace 22 on the sensor layer 2 are transmitted to the subsequent signal processing circuit via the signal output wiring (not shown). Further, the construction structure 4 shown in FIGS. 2 and 3 includes a coating film 41 and a conductive wire 42. Among them, the coating film 41 uses an insulating thin layer material having a dielectric constant of about 2 to 4 and a high light transmittance. For example, ink and high light transmittance polyethylene terephthalate (PET) thin film. The coating area of the coating film 41 is at least large enough to cover the X-axis trace portion 21 b passing between the two sensor units 22 a arranged adjacent to each other on the Y-axis trace 22. The conductive wire 42 is made of a transparent organic conductive material such as indium tin oxide or polyethylenedioxythiophene, and the conductive wire 42 is installed on the upper surface of the coating film 41, The two ends extend to the outside of the coating film 41 to form the electrical connection portion 42a. When combining the construction structure 4 and the sensor layer 2, the coating film 41 is disposed between two sensor units 22 a adjacently arranged on the Y-axis trace 22, and passes between the two sensor units 22 a adjacently arranged. The shaft trace portion 21b is insulated. In addition, the two electrical connection portions 42a of the conductive wire 42 are electrically connected to the two adjacent sensor units 22a, respectively, and the sensor units 22a on the individual Y-axis traces 22 are electrically connected to each other. . Thus, the X-axis trace 21 and the Y-axis trace 22 are provided on the same sensor layer surface.

  With this structure, an equivalent capacitor is formed between the X-axis trace 21 and the silver conduction path 7a, and an equivalent capacitor is also present between the Y-axis trace 22 and the silver conduction path 7b. Therefore, when the finger or conductor touches or slides on the touch pad surface, the signal processing circuit immediately determines the contact position of the conductor or finger in response to the change of the capacitor. As a result, the transparent touchpad of the present invention can be placed in front of the display of electronic products, and the user can easily input by simply touching the required position on the panel with a finger according to the instructions on the monitor screen. Can be done. In addition, since the capacitor-type touchpad in the embodiment of the present invention has the sensor traces in the X-axis direction and the Y-axis direction arranged on the same plane, the arrangement of the sensor traces is accurate and error-free. It has the effect of increasing sensitivity and accuracy.

  Further, FIG. 4 and FIG. 5 show a second embodiment of the present invention. The structure is substantially the same as that of the first embodiment, and the main difference is in the construction structure. The erection structure 6 of Example 2 includes a coating film 61 and a conductive wire 62. The coating film 61 uses an insulating thin layer material having a dielectric constant of about 2 to 4 and a high light transmittance. For example, ink and high light transmittance polyethylene terephthalate (PET) thin film. The covering area of the covering film 61 is large enough to cover at least a part of two sensor units 22a arranged adjacent to each other on the Y-axis trace 22, and at least two through holes 61a and through holes are formed on the covering film 61. 61b is penetrated, and the position of each through hole corresponds to each of the two sensor units 22a arranged adjacently on the Y-axis trace 22 respectively. The conductive wire 62 is made of a transparent organic conductive material such as indium tin oxide or polyethylenedioxythiophene. The conductive wire 62 is installed on the upper surface of the coating film 61, and the two through holes 61a described above are used. It is bridged between the through holes 61b. The two ends of the conductive wire 62 are exposed in the two through holes 61a and 61b to form an electrical connection portion 62a and an electrical connection portion 62b. When combining the construction structure 6 and the sensor layer 2, the coating film 61 is disposed between the two sensor units 22 a adjacently arranged on the Y-axis trace 22, and passes between the two sensor units 22 a arranged adjacently. The X-axis trace portion 21b to be insulated is covered with insulation. Further, the two electrical connection portions 62a and 62b at the two ends of the conductive wire 62 are electrically connected to the two adjacent sensor units 22a through the through holes 61a and 61b, respectively. Thereby, the sensor units 22a on the individual Y-axis traces 22 are electrically connected to each other.

It is an arrangement plan of an X-axis trace and a Y-axis trace of a sensor layer in Example 1 of the present invention. It is a partial expanded top view of the construction structure provided on the sensor layer in Example 1 of this invention. It is side surface sectional drawing in the CC line of FIG. It is the elements on larger scale of the construction structure provided on the sensor layer in Example 2 of this invention. It is side surface sectional drawing in the DD line | wire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base layer 2 Sensor layer 21 X-axis trace 21a Sensor unit 21b X-axis trace part 22 Y-axis trace 22a Sensor unit 24 Trace contact 25 Trace contact 3 Surface layer 4 Construction structure 41 Coating film 42 Conductive wire 42a Electrical connection part 6 Construction structure 61 Cover film 61a Through hole 61b Through hole 62 Conductive wire 62a Electrical connection 62b Electrical connection 7a Silver conduction path 7b Silver conduction path 9 Capacitor type touch pad

Claims (3)

The capacitor type touchpad is composed of a base layer, a sensor layer, and a surface layer, and each of the above layers is made of a transparent material, and the layers are bonded and stacked in order to form a transparent plate body.
The sensor layer is provided with a plurality of X-axis traces and Y-axis traces arranged in a deterministic manner, and contacts are provided at the front ends of the X-axis traces and Y-axis traces, respectively. Since it connects to the signal output wiring as well, the sensor signal of the capacitor type touchpad is transmitted to the subsequent signal processing circuit via the signal output wiring,
In order to install a plurality of X-axis traces and Y-axis traces on the same plane, the sensor units on the individual X-axis traces are connected to each other, and the sensor units on the individual Y-axis traces are arranged at intervals from each other. An installation structure is provided between any two sensor units arranged adjacently on each Y-axis trace, and any two sensor units arranged adjacently on individual Y-axis traces are interconnected. In addition, a capacitor type touch pad that insulates a Y-axis trace portion passing between two sensor units arranged adjacent to each other. The capacitor-type touch pad according to claim 1, wherein the erection structure includes a coating film and a conductive wire,
The covering film is an insulating thin film, and the covering area is at least large enough to cover an X-axis trace portion passing between two sensor units arranged adjacent to each other on the Y-axis trace. Installed on the upper surface of the coating film, the two ends of the conductive wire are extended to the outside of the coating film to form an electrical connection, and between the two sensor units in which the coating film is arranged adjacent to the Y-axis trace The X-axis trace part that passes between two sensor units arranged adjacent to each other is insulated and the electrical connection at the two ends of the conductive wire is just electrically connected to the two adjacent sensor units. Thus, each sensor unit on the individual Y-axis trace is electrically connected to each other.   2. The capacitor-type touch pad according to claim 1, wherein the erection structure is constituted by a coating film and a conductive wire, the coating film is an insulating thin layer, and the coating area is on an individual Y-axis trace. At least a portion of the surface of the two sensor units arranged adjacent to each other, and at least two through holes are formed on the coating film, and the positions of the respective through holes are exactly two adjacently arranged on the Y-axis trace. It corresponds to each of the two sensor units, and the conductive wire is installed on the upper surface of the coating film, spanned between the two through holes, and the two ends of the conductive wire are in the two through holes. To form an electrical connection part, and a coating film is arranged between two sensor units adjacently arranged on the Y-axis trace, and an X-axis trace part passing between the two adjacent sensor units is insulated and coated. In addition, the electric wire The connecting portion passes through the through hole and is electrically connected to each of the two adjacent sensor units, whereby the sensor units on the individual Y-axis traces are electrically connected to each other. Touchpad.

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