CN204143419U - Electronic equipment and capacitive type touch pad thereof - Google Patents

Abstract

The embodiment of the utility model discloses an electronic device and a capacitive touch panel thereof. The capacitive touch panel includes: a substrate, including: a first surface and a second surface oppositely arranged; A plurality of via holes on the surface; a plurality of induction electrode units arranged in parallel, the plurality of induction electrode units are arranged on the first surface, each induction electrode unit includes: a first electrode and a second electrode, the first electrode and the second electrode The second electrodes are comb-shaped, and the first electrodes intersect with the second electrodes to couple to form a mutual capacitance sensing node; the first lead and the second lead are arranged on the second surface, and the first lead passes through the via hole and the second lead. The first electrode is connected, and the second lead is connected to the second electrode through the via hole; the touch chip is connected to the first electrode through the first lead, and connected to the second electrode through the second lead. The capacitive touch panel and the electronic equipment have good touch precision and low manufacturing cost.

Description

Electronic equipment and its capacitive touch panel

technical field

The utility model relates to the technical field of touch control, in particular to an electronic device and a capacitive touch panel thereof.

Background technique

At present, capacitive touch panels, as an important part of human-computer interaction, have been widely used in electronic devices such as notebook computers. The touchpad consists of a pressure-sensitive panel that can sense the trajectory of the finger and two buttons, which are equivalent to the left and right buttons of a standard mouse.

The capacitive touch panel needs to include: a touch chip, a plurality of drive electrodes, a plurality of detection electrodes, a lead wire connecting the plurality of drive electrodes and detection electrodes to the touch chip, and a wire for carrying the touch chip, drive electrodes, and detection electrodes. , Lead substrate. The driving electrodes form a coupling capacitance with the detecting electrodes. The touch chip provides touch driving signals to the plurality of driving electrodes, and receives touch sensing signals output from the plurality of detection electrodes, so as to determine the touched position of the capacitive touch panel.

However, at present, the driving electrodes, detection electrodes, and lead wires of the capacitive touch panel need to be respectively arranged on different layers of the substrate, resulting in a thicker thickness of the capacitive touch panel, which leads to an increase in manufacturing cost, and is not in line with electronic requirements. The development trend of thinner and lighter equipment.

Utility model content

In order to solve the above technical problems, the utility model provides an electronic device and its capacitive touch panel, which reduces the thickness and production cost of the capacitive touch panel, and facilitates thinning of the electronic device.

In order to achieve the above object, the utility model provides the following technical solutions:

A capacitive touch panel, the capacitive touch panel includes:

A substrate, comprising: a first surface and a second surface oppositely disposed, and a plurality of via holes penetrating the first surface and the second surface;

A plurality of sensing electrode units arranged in parallel, the plurality of sensing electrode units are arranged on the first surface, each sensing electrode unit includes: a first electrode and a second electrode, wherein the first electrode and the second electrode Both are comb-shaped, and the first electrode and the second electrode are intersected to couple to form a mutual capacitance sensing node;

a first lead and a second lead disposed on the second surface, the first lead is connected to the first electrode through the via hole, and the second lead is connected to the second electrode through the via hole connect;

The touch chip is connected to the first electrode through the first lead, and connected to the second electrode through the second lead.

Preferably, in the above-mentioned capacitive touch panel, the touch chip is arranged on the second surface of the substrate, and the touch chip is used to detect the capacitance change of the mutual capacitance sensing node to determine that the touch panel is touched s position.

Preferably, in the above-mentioned capacitive touch panel, the touch chip is used to provide a touch drive signal to one of the two types of electrodes, the first electrode and the second electrode, and to receive the output signal from the other type of electrode. The touch sensing signal is used to detect the capacitance change of the mutual capacitance sensing node.

Preferably, in the above-mentioned capacitive touch panel, the first electrode is a driving electrode for receiving the touch driving signal, and the second electrode is a detection electrode for outputting the touch sensing signal.

Preferably, in the above-mentioned capacitive touch panel, the plurality of sensing electrode units are arranged in sequence along the first direction, each sensing electrode unit includes a first electrode and a plurality of second electrodes, and the plurality of second electrodes The first electrodes are arranged in sequence along the second direction, the second direction is perpendicular to the first direction, and the first electrodes are arranged in parallel with a plurality of cross-coupled second electrodes.

Preferably, in the above-mentioned capacitive touch panel, along the second direction, the second electrodes with the same position sequence in each sensing electrode unit are connected together through the via hole, and connected to the touch panel through the second lead wire. same pin of the chip.

Preferably, in the above-mentioned capacitive touch panel, each sensing electrode unit has the same structure; or two adjacent sensing electrode units are mirror images.

Preferably, in the above capacitive touch panel, the substrate is a non-transparent substrate.

Preferably, in the above-mentioned capacitive touch panel, the substrate is a printed circuit board, and the printed circuit board has a double-sided structure of a single-layer board.

Preferably, in the above-mentioned capacitive touch panel, on the substrate, each of the first electrode and the second electrode corresponds to only one via hole.

Preferably, the first electrode and the second electrode of each sensing electrode unit are located on the same layer, and the first electrode and the second electrode respectively include a plurality of comb-shaped branches, and the plurality of comb-shaped branches of the first electrode Cross-coupled with the plurality of comb branches of the plurality of electrodes to form a mutual capacitance sensing node.

The utility model also provides an electronic device, which includes: the touch panel described in any one of the above items.

Preferably, in the above electronic device, the electronic device includes: the electronic device includes a display screen area and a non-display screen area, wherein the touchpad is arranged in the non-display screen area.

Preferably, in the above electronic device, the electronic device is a notebook computer or a mouse or a camera.

It can be seen from the above technical solutions that the capacitive touch panel provided by the present application includes: a substrate, including: a first surface and a second surface oppositely arranged, and a plurality of via holes penetrating the first surface and the second surface ; A plurality of induction electrode units arranged in parallel, the plurality of induction electrode units are arranged on the first surface, each induction electrode unit includes: a first electrode and a second electrode, wherein the first electrode and the second electrode The electrodes are comb-shaped, and the first electrode and the second electrode intersect to form a mutual capacitance sensing node; the first lead and the second lead are arranged on the second surface, and the first lead passes through the The hole is connected to the first electrode, and the second lead is connected to the second electrode through the via hole; the touch chip is connected to the first electrode through the first lead, and connected to the second electrode through the second lead. The lead wire is connected to the second electrode.

It can be seen that the capacitive touch panel described in the present application arranges the electrodes and the leads on the two opposite surfaces of the substrate, and the layout of the sensing electrode unit and the leads can be completed by using a single-layer substrate, which reduces the thickness of the capacitive touch panel; at the same time, The comb-shaped first electrode and the second electrode can increase the area of the coupling capacitance formed between the first electrode and the second electrode, increase the amount of touch change, thereby improving the touch performance of the capacitive touch panel; and the second The first lead and the second lead are arranged on the other side surface of the substrate, which prevents the first lead and the second lead from occupying the touch area. Therefore, there is no touch blind area in the capacitive touch screen, which further improves touch control. performance. The electronic device has the capacitive touch panel, which is thin and has high touch performance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural view of a capacitive touch panel with a bridging structure provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a first surface of a capacitive touch panel provided in an embodiment of the present application;

3 is a schematic structural view of a second surface of the capacitive touch panel shown in FIG. 2;

FIG. 4 is a schematic structural diagram of the first surface of another capacitive touch panel provided by the embodiment of the present application;

FIG. 5 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another electronic device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another electronic device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In order to make the thickness of the capacitive touch panel thinner, the driving electrodes and the detection electrodes are made on the same layer, and the connection is realized by bridging. Specifically, a capacitive touch panel with a single-layer electrode structure is shown in FIG. 1 . The electrode structure of the capacitive touch panel includes: a plurality of first electrodes Y1 , Y2 , Y3 arranged in parallel along the Y direction and a plurality of second electrodes X1 , X2 , X3 , X4 arranged in parallel along the X direction. Wherein, one type of electrode among the first electrode and the second electrode is used as a driving electrode, and the other type of electrode is used as a detecting electrode. The electrode pattern 14 of the same first electrode is connected to itself in the X direction, and the electrode pattern 13 of the same second electrode is connected through the bridging structure 11 in the Y direction, and a mutual capacitance sensing node 12 is formed between the first electrode and the second electrode . The touch chip (not shown) of the capacitive touch panel realizes touch detection by detecting the mutual capacitance of the mutual capacitance sensing node 12 .

Although the embodiment shown in FIG. 1 can implement a capacitive touch panel with a single-layer electrode structure, a bridging structure needs to be fabricated, resulting in high manufacturing costs. In addition, the coupling capacitance between the first electrode and the second electrode is mainly concentrated at the bridging junction, the coupling area of the mutual capacitance node is small, the amount of touch change is small, and there is a problem of poor touch performance. Further, in the electrode patterns 13 belonging to the same second electrode, except for the electrode patterns on both sides of the edge, a via hole 15 is correspondingly provided, and the electrode patterns 13 at other positions need to be provided with two via holes 15, so that by setting the via holes 15 Bridging realizes the corresponding connection of the same second electrode. It can be seen that the number of via holes 15 required for such a connection is large, which further leads to an increase in manufacturing cost.

Referring to FIG. 2 and FIG. 3 , the embodiment of the present application provides a capacitive touch panel 1 with high touch performance, no need for bridging structures, and a small number of via holes. FIG. 2 is a schematic structural diagram of the first surface of the capacitive touch panel 1 , and FIG. 3 is a schematic structural diagram of the second surface of the capacitive touch panel 1 shown in FIG. 2 .

The capacitive touch panel 1 includes: a substrate 2 , a plurality of sensing electrode units 3 arranged in parallel, a first lead 4 , a second lead 5 and a touch chip 6 .

The substrate 2 includes: a first surface 21 and a second surface 22 oppositely disposed, and a plurality of via holes 7 penetrating through the first surface 21 and the second surface 22 .

The plurality of sensing electrode units 3 are disposed on the first surface 21 . The plurality of sensing electrode units 3 are arranged in sequence along the first direction. Each sensing electrode unit 3 includes: a first electrode and a second electrode, wherein the first electrode and the second electrode are both comb-shaped, respectively including a plurality of comb-shaped branches, and the comb of the first electrode The comb-shaped branch a intersects with the comb-shaped branch b of the second electrode to couple to form a mutual capacitance sensing node ab. Wherein, the substrate 2 is a non-transparent substrate. Preferably, the substrate 2 is a printed circuit board (PCB), and the printed circuit board is a single-layer board with double-sided structure. Preferably, the first electrode and the second electrode are single-layer electrode patterns, in other words, the first electrode and the second electrode are made of the same layer of conductive material.

Both the first electrode and the second electrode are arranged in a comb shape, which can increase the area of the coupling capacitance formed between the first electrode and the second electrode, increase the amount of touch change, and thus improve the capacitive touch. Touch performance of board 1. In this embodiment, the structures of the sensing electrode units 3 are the same. Each sensing electrode unit 3 includes a first electrode and a plurality of second electrodes, the plurality of second electrodes are arranged in sequence along the second direction, and the first electrode and the plurality of second electrodes are arranged in parallel. The first electrode of each sensing electrode unit 3 is cross-coupled with a plurality of second electrodes to form a plurality of mutual capacitance sensing nodes. Wherein, the first electrodes of the plurality of sensing electrode units 3 are arranged in sequence along the first direction, which are respectively Y1, Y2, Y3, and Y4. A plurality of second electrodes of the same sensing electrode unit 3 are arranged in sequence along the second direction, respectively X1, X2, X3, and X4. The first direction is perpendicular to the second direction. The first direction is the Y-axis direction of the coordinate system marked in FIG. 2 , and the second direction is the X-axis direction.

It should be noted that the number of the first electrodes and the second electrodes is not limited to the number given in this embodiment, for example, it may also be different according to the size of the product. In addition, for the first electrodes: each first electrode can also be divided into multiple electrodes, that is, the first electrodes can be integrated as shown in FIG. 2 , or the second electrodes can be divided into multiple segments as shown in FIG. 2 .

Referring to FIG. 3, the first lead 4 and the second lead 5 are arranged on the second surface 22, and the first lead 4 is connected to the first lead 4 through the corresponding via hole 7 formed on the substrate 2. The electrode is connected, and the second lead 5 is connected to the second electrode through the corresponding via hole 7 formed on the substrate 2 . The first lead 4 and the second lead 5 are arranged on the second surface 22 of the substrate 2, and the first electrode and the second electrode are arranged on the first surface 21, so that the lead wires can be avoided. The touch area is occupied, thereby avoiding the formation of touch blind areas, thereby improving the touch accuracy.

The touch chip 6 is connected to the first electrode through the first lead 4 and connected to the second electrode through the second lead 5 . The touch chip 6 is disposed on the second surface 22 and is used for detecting the capacitance change of the mutual capacitance sensing node ab to determine the touched position of the capacitive touch panel 1 .

The touch chip 6 is used to provide a touch drive signal to one of the two types of electrodes, the first electrode and the second electrode, and to receive a touch sensing signal output by the other type of electrode to detect the A plurality of mutual capacitances senses a change in capacitance of the node ab.

In the embodiment of the present application, the first electrode may be used as a driving electrode for receiving the touch driving signal, and the second electrode may be used as a detection electrode for outputting the touch sensing signal. The first electrode may also be used as a detection electrode, and the second electrode may be used as a driving electrode.

Further, along the second direction, the second electrodes with the same position sequence in each sensing electrode unit 3 are connected together through the corresponding via holes 7 formed on the substrate 2, and connected to the touch sensor through the second lead 5. The same pin of chip 6. As shown in Figure 3, that is, for the second electrodes of the same row, they are all connected into a row through the corresponding via holes 7 formed on the substrate 2 and the second lead wires 5, and then connected to the same electrode of the touch chip 6. pin. Different rows of second electrodes are connected to different pins of the touch chip 6 . Wherein, on the substrate 2, only one via hole 7 is provided corresponding to each of the first electrode and the second electrode. In this embodiment, the via hole 7 can be realized by etching or laser drilling.

Since the capacitive touch panel 1 is only provided with one via hole 7 corresponding to each first electrode and second electrode, each second electrode in a sensing electrode unit 3 communicates with another adjacent electrode through the corresponding via hole 7. The second electrodes with the same position sequence in one sensing electrode unit 3 are connected, therefore, the number of via holes is small, thereby saving manufacturing cost and improving product quality.

In the capacitive touch panel 1 with the electrode structures shown in FIG. 2 and FIG. 3 , the structures of the sensing electrode units 3 are the same. In order to improve touch accuracy and touch linearity, as shown in FIG. 4 , two adjacent sensing electrode units 3 may also be set to be mirror-symmetrical.

It can be seen from the above description that the capacitive touch panel 1 according to the embodiment of the present application has the first electrode and the second electrode arranged on the first surface 21 of the substrate 2, and the first lead 4 and the The second lead wire 5 is arranged on the second surface 22 of the substrate 2, the connection between the corresponding electrode and the lead wire is realized through the corresponding via hole 7, and the connection between the corresponding lead wire and the touch chip 6 is realized through the corresponding via hole 7, so that A thinner substrate 2 with a single-layer double-sided structure can be used, which is convenient for thinner and lighter electronic equipment. At the same time, there is no need to build a bridge, and the cost is low. In addition, the comb electrode structure is adopted to improve the touch performance.

Based on the above embodiments, referring to FIG. 5 , the present application further provides an electronic device 41 , and the electronic device 41 includes: a touch panel 42 . The touch panel 42 is the capacitive touch panel 1 described in any one of the above-mentioned embodiments.

The electronic device 41 in this embodiment is, for example, a notebook computer, a mouse, or a camera.

Preferably, the electronic device 41 further includes a display screen, and the touch panel 42 is connected to the display screen through a controller, and the controller controls the electronic device to perform corresponding operations according to the touch detection result of the touch panel 42. Operate and control the display screen to display corresponding images.

According to the location of the display screen, the area where the display screen of the electronic device 41 is located is defined as a display screen area, and other areas are non-display screen areas, wherein the touchpad 42 is arranged in the non-display screen area.

When the electronic device 41 includes a display screen, in one embodiment, as shown in FIG. .

When the electronic device 41 includes a display screen, in another embodiment, as shown in FIG. The flat structure 62 can be folded over. Wherein, the touchpad 42 is arranged on one surface of the flat panel structure 61 , and the display screen 43 is arranged on the surface of the flat panel structure 62 opposite to the flat panel structure 61 .

Since the electronic device 41 adopts the capacitive touch panel 1 described in the above embodiment, it can be seen from the description of the above embodiment that the electronic device 41 also has the advantages of good touch accuracy and low manufacturing cost.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (14)

1. A capacitive touch panel, characterized in that, comprising: A substrate, comprising: a first surface and a second surface oppositely disposed, and a plurality of via holes penetrating the first surface and the second surface; A plurality of sensing electrode units arranged in parallel, the plurality of sensing electrode units are arranged on the first surface, each sensing electrode unit includes: a first electrode and a second electrode, wherein the first electrode and the second electrode Both are comb-shaped, and the first electrode and the second electrode are intersected to couple to form a mutual capacitance sensing node; a first lead and a second lead disposed on the second surface, the first lead is connected to the first electrode through the via hole, and the second lead is connected to the second electrode through the via hole connect; The touch chip is connected to the first electrode through the first lead, and connected to the second electrode through the second lead. 2. The capacitive touch panel according to claim 1, wherein the touch chip is arranged on the second surface of the substrate, and the touch chip is used to detect the capacitance change of the mutual capacitance sensing node, so as to A location where the touchpad is touched is determined. 3. The capacitive touch panel according to claim 2, wherein the touch chip is used to provide a touch drive signal to one of the two types of electrodes, the first electrode and the second electrode, and is used for The touch sensing signal output by another type of electrode is received to detect the capacitance change of the mutual capacitance sensing node. 4. The capacitive touch panel according to claim 3, wherein the first electrode is a drive electrode for receiving the touch drive signal, and the second electrode is a detection electrode for outputting the touch drive signal. the touch sensing signal. 5. The capacitive touch panel according to claim 4, wherein the plurality of sensing electrode units are arranged in sequence along the first direction, and each sensing electrode unit includes a first electrode and a plurality of second electrodes, The plurality of second electrodes are arranged in sequence along a second direction, the second direction is perpendicular to the first direction, and the first electrodes are arranged in parallel with the plurality of cross-coupled second electrodes. 6. The capacitive touch panel according to claim 5, characterized in that, along the second direction, the second electrodes with the same position sequence in each sensing electrode unit are connected together through the via hole, and are connected together through the first electrode unit. The two leads are connected to the same pin of the touch chip. 7 . The capacitive touch panel according to claim 5 , wherein the sensing electrode units have the same structure; or two adjacent sensing electrode units are mirror images. 8. The capacitive touch panel according to claim 1, wherein the substrate is a non-transparent substrate. 9. The capacitive touch panel according to claim 8, wherein the substrate is a printed circuit board, and the printed circuit board is a single-layer board with double-sided structure. 10 . The capacitive touch panel according to claim 8 , wherein on the substrate, each of the first electrode and the second electrode corresponds to only one via hole. 11 . 11. The capacitive touch panel according to claim 1, wherein the first electrode and the second electrode of each sensing electrode unit are located on the same layer, and the first electrode and the second electrode respectively comprise a plurality of Comb-shaped branches, the plurality of comb-shaped branches of the first electrode and the plurality of comb-shaped branches of the plurality of electrodes are cross-coupled to form a mutual capacitance sensing node. 12. An electronic device, characterized in that the electronic device comprises: the touch panel according to claims 1-11. 13 . The electronic device according to claim 12 , wherein the electronic device comprises: a display screen area and a non-display screen area, wherein the touchpad is arranged in the non-display screen area. 14 . 14. The electronic device according to claim 12, wherein the electronic device is a notebook computer or a mouse or a camera.