CN111596803A

CN111596803A - Touch panel device

Info

Publication number: CN111596803A
Application number: CN202010473563.8A
Authority: CN
Inventors: 卞经纬
Original assignee: Wuxi Wuhao Machinery Equipment Co ltd
Current assignee: Wuxi Wuhao Machinery Equipment Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-08-28

Abstract

The invention provides a touch panel device with a single-layer radial electrode point layout, which comprises a touch panel and a plurality of electrode points. The touch panel has a surface. The plurality of electrode points are arranged on the surface in a diamond structure, each electrode point is respectively arranged on four vertexes of the diamond structure, wherein each electrode point is extended outwards in a diffused mode at uniform intervals from the center of the electrode point by a plurality of linear wires to form a radial shape, and one linear wire of each electrode point extends to one side edge of the touch panel by a connecting wire. The touch panel device with the single-layer radial electrode point layout saves cost and can avoid detection errors when the electrode points are connected to the control circuit.

Description

Touch panel device

Technical Field

The present invention relates to a touch panel structure, and more particularly, to a touch panel device with a single-layer radial electrode layout.

Background

The touch panel has a technical principle that when a finger or other medium touches a screen, voltage, current, sound wave or infrared ray and the like are detected according to different induction modes, so that the coordinate position of a touch point is measured. For example, the resistance type is to calculate the position of the pressure point by using the potential difference between the upper and lower electrodes to detect the position of the touch point. The capacitive touch panel detects coordinates of a transparent electrode arranged on a touch panel from a current or voltage generated by a capacitance change generated by electrostatic coupling between the transparent electrode and a human body.

With the popularization of smart phones, the technical demand of multi-touch is increasing day by day. At present, multi-touch is mainly realized by a projected capacitive touch technology.

The projected capacitive technology is mainly to form a matrix of staggered rows and columns of sensing units by a double-layer indium tin oxide material to detect an accurate touch position. The basic principle of the projected capacitive touch technology is mainly capacitance sensing, and a plurality of groups of transparent conducting wires which have different planes and are mutually vertical are added by designing a plurality of etched indium tin oxide material electrodes to form a driving wire similar to an X, Y axis. The wires are controlled by the controller, and the scanning detection capacitance value is sequentially and alternately changed to the controller.

However, the touch panel using the dual-layer ito structure is realized only by adopting a bridge structure. In addition, because the double-layer structure is adopted on the same plane, the circuit distance is narrow when the electrode points are connected to the controller, and short circuit is easy to generate to cause detection errors.

Disclosure of Invention

The present invention is directed to a touch panel device with a single-layer radial electrode layout, which can save the cost and avoid the detection error when the electrode is connected to the control circuit.

The invention provides a touch panel device with a single-layer radial electrode point layout, which comprises a touch panel and a plurality of electrode points. The touch panel has a surface. The plurality of electrode points are arranged on the surface in a diamond structure, each electrode point is respectively arranged on four vertexes of the diamond structure, wherein each electrode point is extended outwards in a diffused mode at uniform intervals from the center of the electrode point by a plurality of linear wires to form a radial shape, and one linear wire of each electrode point extends to one side edge of the touch panel by a connecting wire.

Preferably, the plurality of electrode points may be made of an indium tin oxide material. Then, the connecting wire extending to the first side is connected to a flexible circuit board. The present invention further includes a control circuit electrically connected to the plurality of electrode points via the flexible printed circuit.

Drawings

FIG. 1 is a schematic diagram illustrating the operation of the preferred embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 3 and 4 are schematic diagrams illustrating the detection of the position of a touch point according to the present invention.

FIG. 5 is a schematic structural diagram of another preferred embodiment of the present invention.

Detailed Description

As shown in the drawings, the touch panel device 1 of the present invention with a single-layer radial electrode dot layout includes: the touch panel 10, a plurality of electrode points 11, a flexible circuit board 12, and a control circuit 13.

The touch panel 10 has a surface 100, a first side 101, and a second side 102. The surface 100 is laid out with the plurality of electrode points 11.

The plurality of electrode points 11 include fifteen electrode points 1101-1115. Preferably, the fifteen electrode points 1101-1115 are made of transparent conductive material. The transparent conductive material is preferably an indium tin oxide material.

The invention is mainly characterized in that: each of the electrode points 1101-1115 is respectively disposed on four vertices of the diamond structure 21, wherein each of the electrode points 1101-1115 is formed in a radial shape by a plurality of linear wires 22 extending outward from the center 23 of the electrode points 1101-1115 at regular intervals in a diffused manner, and one of the linear wires 22 of each of the electrode points 1101-1115 extends to a side 101 of the touch panel 1 by a connecting wire 801-815.

The plurality of electrode points 1101-1115 extend to the same side 101 of the touch panel 1 through respective connecting wires 801-815 to be further electrically connected to a flexible circuit board 12. The flexible printed circuit 12 is further connected to the control circuit 13. Thus, the control circuit 13 can detect the sensing values of the plurality of electrode points 1101-1115 through the flexible circuit board 12.

Hereinafter, the present embodiment illustrates how to detect the touch point position according to the present invention. First, the surface 100 of the touch panel 10 receives at least one touch point, and each of the electrode points 1101-1115 generates a sensing value according to the position and size of the at least one touch point.

When the finger directly touches the electrode point 1108, the induced voltage generated by the electrode point 1108 is larger than the induced voltages generated by the

peripheral electrode points

1105, 1106, 1111, and 1112, that is, when the induced voltage generated by the electrode point 1108 is larger than the first threshold and the induced voltages generated by the

peripheral electrode points

1105, 1106, 1111, and 1112 are smaller than the first threshold, the control circuit 13 may determine that the finger directly touches the electrode point 1108. The area of the electrode point 1108 can be further divided into nine areas a to I in the form of a grid, and at this time, the control circuit 13 determines which area of the areas a to I in the electrode point 1108 the finger touches according to the induced voltages generated by the

peripheral electrode points

1105, 1106, 1111, and 1112.

When the induced voltages generated by the upper left and lower

left electrodes

1105, 1106 of the electrode 1108 are both greater than the second threshold value, and the induced voltages generated by the upper right and lower

right electrodes

1111, 1112 of the electrode 1108 are both less than the second threshold value, the control circuit 13 may determine that the finger directly touches the A, B, C area in the electrode 1108.

Then, the control circuit 13 determines which area A, B, C of the electrode point 1108 the finger touches, and when the difference between the induced voltages generated by the

electrode points

1105 and 1106 is smaller than the third threshold, the induced voltages generated by the

electrode points

1105 and 1106 may be considered to be equal, so the control circuit 13 may determine that the finger touches the B area of the electrode point 1108.

When the difference between the induced voltage generated by the electrode point 1105 and the induced voltage generated by the electrode point 1106 is larger than the third threshold, the control circuit 13 determines that the finger touches the area a in the electrode point 1108. When the difference between the induced voltage generated by the electrode point 1106 and the induced voltage generated by the electrode point 1105 is greater than the third threshold, the control circuit 13 determines that the finger touches the C region of the electrode point 1108.

As shown in fig. 4, when the induced voltages generated by the

electrode points

1102, 1105, 1106, and 1108 located at the four vertices of the diamond-shaped structure 21 are not greater than the first threshold, the control circuit 13 may determine that the finger does not directly touch the top of any of the

electrode points

1102, 1105, 1106, and 1108. At this time, the area not covered by the

electrode points

1102, 1105, 1106 and 1108 in the middle of the diamond structure 21 can be divided into nine areas a 'to I' in the form of a grid, and the control circuit 13 determines which area of the areas a 'to I' between the

electrode points

1102, 1105, 1106 and 1108 the touch point position is in according to the induced voltage generated by the

peripheral electrode points

1102, 1105, 1106 and 1108.

When the induced voltage generated by the electrode point 1102 is greater than the fourth threshold and the induced voltages generated by the

electrode points

1105, 1106, and 1108 are less than the fourth threshold, the control circuit 13 can determine that the finger touch position is in the areas a ', B ', and C '.

Then, the control circuit 13 determines where the finger touch position is located in the regions a ', B ', and C '. When the difference between the induced voltages generated by the

electrode points

1105 and 1106 is smaller than the fifth threshold, the induced voltages generated by the

electrode points

1105 and 1106 may be considered to be equal, so the control circuit 13 may determine that the finger touches the region B'.

When the difference between the induced voltage generated by the electrode point 1105 and the induced voltage generated by the electrode point 1106 is larger than the sixth threshold, the control circuit 13 determines that the finger touches the region a'. When the difference between the induced voltage generated by the electrode point 1106 and the induced voltage generated by the electrode point 1105 is greater than the sixth threshold, the control circuit 13 determines that the finger touches the region C'.

Fig. 5 is a schematic structural diagram of another preferred embodiment of the present invention, which is similar to fig. 2, and the main difference is that a plurality of auxiliary electrode points 15 are added, each auxiliary electrode point 1501 to 1503 is respectively disposed on the central point of the diamond structure 21, each auxiliary electrode point 1501 to 1503 is formed in a radial shape by a plurality of straight wires 52 extending outward from the center 53 of the auxiliary electrode point at uniform intervals, and one straight wire 52 of each auxiliary electrode point 1501 to 1503 extends to one side 101 of the touch panel 1 by a connecting wire. Each electrode point 1101-1109 has the same first diameter, each auxiliary electrode point 1501-1503 has the same second diameter, and the first diameter is larger than the second diameter. In the present embodiment, the auxiliary electrode points 1501 to 1503 are disposed, so that the region between the touch points 1101 to 1109 can be detected more effectively, and when a finger does not directly touch any one of the

electrode points

1102, 1105, 1106, and 1108 at the four vertices of the diamond structure 21, the auxiliary electrode point 1502 is disposed between the

electrode points

1102, 1105, 1106, and 1108, so that the control circuit 13 can determine that the finger directly touches the auxiliary electrode point 1502, and accurately determine the touched position.

However, the above embodiments are merely exemplary for convenience of description, and the claimed invention should not be limited to the above embodiments but should be defined by the claims.

Claims

1. A touch panel device with a single-layer radial electrode dot layout, comprising: a touch panel having a surface; the touch panel comprises a surface, a plurality of electrode points, a plurality of connecting wires and a plurality of electrodes, wherein the electrode points are arranged on the surface in a diamond structure, each electrode point is respectively arranged on four vertexes of the diamond structure, each electrode point is extended outwards in a diffused mode at uniform intervals from the center of the electrode point by a plurality of linear wires to form a radial shape, and one linear wire of each electrode point extends to one side edge of the touch panel by a connecting wire.

2. The touch panel device of claim 1, wherein the plurality of electrode pads extend to a same side of the touch panel via respective connecting wires for further connection to a flexible circuit board.

3. The touch panel device of claim 2, wherein the plurality of electrode dots are made of a transparent conductive material.

4. The touch panel device of claim 3, wherein the transparent conductive material is ITO.

5. The touch panel device of claim 4, wherein the surface of the touch panel is configured to receive at least one touch point.

6. The touch panel device of claim 5, wherein each electrode generates a sensing value according to the position and size of the at least one touch point.

7. The touch panel device of claim 2, further comprising a control circuit electrically connected to the plurality of electrode pads via the flexible printed circuit.

8. The touch panel device of claim 7, further comprising: each auxiliary electrode point is respectively arranged on the central point of the diamond structure, each auxiliary electrode point is extended outwards in a diffused mode at uniform intervals from the center of the auxiliary electrode point by a plurality of linear wires to form a radial shape, and one linear wire of each auxiliary electrode point extends to one side edge of the touch panel by a connecting wire.

9. The touch panel device of claim 8, wherein each electrode dot has a same first diameter, each auxiliary electrode dot has a same second diameter, and the first diameter is larger than the second diameter.