CN210428416U

CN210428416U - Self-contained touch screen and touch display device with same

Info

Publication number: CN210428416U
Application number: CN201921729565.8U
Authority: CN
Inventors: 侯卫京; 吴大春; 陈箭雾; 肖辉丹; 龚尤岗
Original assignee: Duntai Technology Shenzhen Co Ltd
Current assignee: Duntai Technology Shenzhen Co Ltd; FocalTech Systems Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-04-28
Anticipated expiration: 2029-10-15
Also published as: TWM608754U

Abstract

The utility model provides a self-contained touch screen, which comprises a substrate, a plurality of electrode units, a plurality of first leads and a plurality of second leads, wherein the plurality of electrode units are arranged on the substrate and are arranged at intervals along the circumferential direction, each electrode unit comprises an azimuth angle electrode group and a radius electrode group, any adjacent azimuth angle electrode groups have the same angle difference, and a radius electrode group is arranged between two adjacent azimuth angle electrode groups; the plurality of first leads and the plurality of second leads are used for electrically connecting the azimuth electrode group and the radius electrodes with different radiuses to corresponding bonding pads respectively; the plurality of electrode units, the first lead and the second lead are all arranged on the same conductive layer; and obtaining the coordinates of the touch points through the azimuth information of the azimuth electrode and the radius information of the radius electrode in the electrode unit. The utility model also provides a touch-control display device.

Description

Self-contained touch screen and touch display device with same

Technical Field

The utility model relates to a touch screen technical field especially relates to a from holding formula touch screen and having this touch-control display device from holding formula touch screen.

Background

With the development of touch screen technology, capacitive touch screens are increasingly widely used in electronic devices such as mobile phones and tablet computers as human-computer interaction interfaces. The traditional single-layer self-capacitance touch screen only needs one layer of transparent conductive material, so that the cost is low.

Referring to fig. 1, for a rectangular touch screen, a design similar to a triangular electrode can be adopted to realize single-point touch. Wherein each pair of triangular electrodes extends in the Y-axis (long side) direction. In the X-axis (short side) direction, the identification of coordinates is done by groups of different electrodes. The dimension of each set of electrodes in the X-axis (short side) direction is one PITCH (channel). Therefore, in the X-axis (short side) direction, multi-touch can be really recognized, and in the Y-axis (long side) direction, the touch coordinates are calculated by the ratio of the two same electrode induction quantities, and single-point touch or multi-point touch corresponds to the induction ratio of the same group of electrodes, so that the coordinates of multi-point touch in the same group cannot be distinguished. Meanwhile, referring to fig. 2 to 4, a scheme of X-axis multi-point touch and Y-axis two-point touch (see fig. 2), a scheme of X-axis single-point touch and Y-axis multi-point touch (see fig. 3), a scheme of X-axis two-point touch and Y-axis multi-point touch (see fig. 4), and the like can be designed according to requirements.

In addition, in recent years, with the gradual popularization of wearable products, the demand for touch solutions of irregular shapes, such as square shapes, square shapes with arc corners (quasi-square shapes), and circular shapes, has become stronger, and various manufacturers have proposed solutions such as GFF (mutual capacitance) and ON-CELL (mutual capacitance bridge), and the single-layer self-capacitance solution has become a low-cost choice.

Referring to fig. 5 to 7, for a square, circular or circular-like touch screen, when a triangular electrode design is used, the touch screen cannot support real two-point touch, and therefore a square array design is usually adopted. However, although the tile array design can realize real multi-touch, if higher linearity and precision are required, the size of the tile needs to be designed to be smaller, which is liable to cause problems such as increase of lead wires and increase of the area of a Flexible Printed Circuit (FPC), and is not favorable for the structural layout of the wearable product.

Referring to fig. 7, taking a square touch panel with arc corners as an example, when a triangular electrode design is used, the edge portion has poor pattern symmetry with the increase of geometric dimensions, and the touch accuracy and linearity are greatly reduced. For example, when the geometric dimensions increase, the asymmetry of the asymmetric regions of the square edges with arc angles, such as the regions B1, B2 and B3, increases, and thus the linearity and accuracy are greatly affected.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing, it is desirable to provide a self-contained touch panel and a touch display device having the same, which can achieve multi-touch at low cost.

An aspect of the utility model provides a from holding formula touch screen, include:

a substrate;

the electrode units are arranged on the substrate and are arranged at intervals along the circumferential direction, each electrode unit comprises an azimuth angle electrode group and a radius electrode group, any adjacent azimuth angle electrode group has the same angle difference, and a radius electrode group is arranged between every two adjacent azimuth angle electrode groups;

the azimuth electrode group comprises one or a pair of azimuth electrodes, the one or a pair of azimuth electrodes extend along the radius of the circumference, and the radius electrode group comprises at least two radius electrodes arranged along the radius direction of the circumference; and

a plurality of first leads for electrically connecting the azimuth electrode groups to the corresponding pads, respectively; and

a plurality of second leads for electrically connecting the radius electrodes of different radii to the corresponding pads, respectively;

the plurality of electrode units, the first lead and the second lead are all arranged on the same conductive layer;

and obtaining the coordinates of the touch points through the azimuth information of the azimuth electrode and the radius information of the radius electrode in the electrode unit.

Preferably, the radial electrodes in the radial electrode group have equal extension lengths along the radial direction.

Preferably, radius electrodes having the same radius are partially or fully connected together.

Preferably, the outermost radius electrode comprises a pair of sub-radius electrodes, the sub-radius electrodes being complementary triangular or polygonal pairs, the sub-radius electrodes being driven by two different second leads.

Preferably, the outermost radius electrode includes a pair of sub-radius electrodes, the pair of sub-radius electrodes are complementary triangular pairs or polygonal pairs, one sub-radius electrode is driven by a single second lead, the other sub-radius electrode is electrically connected with the adjacent sub-radius electrode in the adjacent pair of sub-radius electrodes and driven by the single second lead, and the other sub-radius electrode in the adjacent pair of sub-radius electrodes is driven by the single second lead.

Preferably, the first lead is led out from the outer periphery of the self-contained touch screen, and the second lead is led out from a gap between one of the radius electrode groups and the adjacent azimuth electrode group.

Preferably, the set of azimuth electrodes comprises a pair of azimuth electrodes, the pair of azimuth electrodes being complementary triangular or polygonal pairs, the pair of azimuth electrodes being driven by two different first leads.

Preferably, the azimuth electrode group comprises a pair of azimuth electrodes, the pair of azimuth electrodes are complementary triangular pairs or polygonal pairs, one azimuth electrode is driven by a single first lead, the other azimuth electrode is electrically connected with the adjacent azimuth electrode in the adjacent azimuth electrode group and driven by the single first lead, and the other azimuth electrode in the adjacent azimuth electrode group is driven by the single first lead.

Preferably, the self-contained touch screen further comprises a circle center electrode, when the self-contained touch screen is circular or quasi-circular, the circle center electrode is arranged at the circle center of the self-contained touch screen, a circle is drawn by the radius of the self-contained touch screen, the azimuth electrode group and the radius electrode group are arranged according to the circle center and the radius, and the second lead is further used for electrically connecting the circle center electrode to the corresponding pad.

Preferably, the self-contained touch screen further comprises a circle center electrode, when the self-contained touch screen is square or square with arc angles, a circle is drawn by taking the geometric center of the square as a circle center and taking a half of a diagonal line of the square as a radius, the azimuth electrode group and the radius electrode group are arranged according to the circle center and the radius, the circle center electrode is arranged at the geometric center of the self-contained touch screen, and the second lead is further used for electrically connecting the circle center electrode to a corresponding pad.

The utility model also provides a touch-control display device, including the aforesaid from holding formula touch-control screen, display screen, connecting wire and driver chip, should set up on this display screen or integrated in this display screen from holding formula touch-control screen, and be connected with this driver chip electricity through this connecting wire.

Preferably, the touch display device is circular, round-like, square or square with arc corners.

The utility model discloses a from holding formula touch-control screen uses simplest individual layer from holding technology, can realize true multiple spot and detect, has overcome the tradition from holding the shortcoming that can only realize single-point touch-control or two point touch-controls of subregion, has promoted the touch-control performance by a wide margin. Simultaneously the utility model is suitable for an on dysmorphism touch-control screen such as circular or square, for traditional adoption small square electrode, can obviously reduce the quantity of binding pad (bonding pad) to all-round promotion the individual layer is from holding the competitiveness of product in aspects such as performance, price, structural requirement.

Drawings

Fig. 1 to 4 are schematic diagrams of a rectangular touch screen in the prior art, which adopts a triangular electrode design.

Fig. 5 is a schematic diagram of a circular or quasi-circular touch screen in the prior art adopting a square array design.

Fig. 6 is a schematic diagram of a square array design for a square touch screen in the prior art.

Fig. 7 is a schematic diagram of a square touch screen with curved corners using a triangular electrode design in the prior art.

Fig. 8 is a schematic view of a self-contained touch screen according to a first preferred embodiment of the present invention.

Fig. 9 is a schematic view of a self-contained touch screen according to a second preferred embodiment of the present invention.

Fig. 10 is a schematic view of a self-contained touch panel according to a third preferred embodiment of the present invention.

Fig. 11a and 11b are schematic views of a self-contained touch panel according to a fourth preferred embodiment of the present invention.

Fig. 12a and 12b are schematic views of a self-contained touch panel according to a fifth preferred embodiment of the present invention.

Fig. 13 is a schematic view of a self-contained touch screen according to a sixth preferred embodiment of the present invention.

Fig. 14 is a schematic view of a self-contained touch screen according to a seventh preferred embodiment of the present invention.

Fig. 15 is a schematic view of a self-contained touch panel according to an eighth preferred embodiment of the present invention.

Fig. 16a and 16b are schematic views of a self-contained touch panel according to a ninth preferred embodiment of the present invention.

Fig. 17a is a schematic view of a self-contained touch panel according to a tenth preferred embodiment of the present invention.

Fig. 17b is a schematic view of a self-contained touch panel according to an eleventh preferred embodiment of the present invention.

Fig. 18 is a schematic diagram of a connection line of the self-contained touch screen of the present invention.

Description of the main elements

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 8, a first embodiment of the present invention provides a self-contained touch screen 100. The self-contained touch screen 100 includes a substrate 11, a center electrode R0, and a plurality of electrode units 13.

In the present embodiment, the substrate 11 is circular or circular-like, that is, the self-contained touch screen 100 is a circular or circular-like touch screen. The plurality of electrode units 13 are all disposed on the same conductive layer of the substrate 11.

In the present embodiment, the radius of the self-contained touch screen 100 is used to draw a circle, and the plurality of electrode units 13 are disposed according to the center and radius of the self-contained touch screen 100 and are spaced apart from each other. Specifically, the plurality of electrode units 13 are uniformly arranged at an angle in the circumferential direction, and the plurality of electrode units 13 have the same pitch therebetween. The center electrode R0 is disposed at the center of the self-contained touch screen 100.

In the present embodiment, each electrode unit 13 includes an azimuthal electrode set 131 and a radial electrode set 133. The azimuthal electrode sets 131 and the radial electrode sets 133 in the plurality of electrode units 13 are alternately arranged at intervals along the circumferential direction. The pitch between the azimuthal electrode group 131 and the radial electrode group 133 in each electrode unit 13 is the same. In the present embodiment, one radius electrode set 133 is disposed between every two adjacent azimuth electrode sets 131. And the two adjacent azimuthal electrode sets 131 are completely symmetrical with respect to the radial electrode set 133. Similarly, an azimuthal electrode set 131 is disposed between two adjacent radial electrode sets 133. And the two adjacent radial electrode sets 133 are completely symmetrical with respect to the azimuthal electrode set 131.

For example, in the present embodiment, the self-contained touch panel 100 includes eight electrode units 13. Therefore, the self-contained touch screen 100 includes eight azimuthal electrode sets 131 and eight radial electrode sets 133. The eight azimuthal electrode sets 131 and the eight radial electrode sets 133 are alternately arranged along the circumferential direction. Each of the azimuth electrode groups 131 represents an angle of 45 degrees (i.e., 360/8-45), i.e., any adjacent ones of the azimuth electrode groups 131 have the same angle difference.

It is understood that in the present embodiment, the azimuth electrode set 131 includes one azimuth electrode 131 a. That is, the number of azimuth electrodes in the azimuth electrode group 131 is one. Each of the azimuth electrodes 131a has a full block shape, such as a bar shape, a polygon shape, a fan shape, or the like. The azimuth electrodes 131a in the plurality of azimuth electrode groups 131 each extend in a radial direction of the circumference. The azimuthal electrodes 131a have the same shape, size, and structure.

It will be appreciated that each set of radial electrodes 133 includes at least two radial electrodes arranged in a radial direction. The radius electrodes are all in a complete block shape, such as a bar shape, a polygon shape, a fan shape or other similar shapes. In the present embodiment, each of the radial electrode groups 133 includes two radial electrodes R1, R2 arranged in the radial direction. The electrodes having the same radius have the same shape, size, and structure.

It is understood that in the present embodiment, the azimuthal electrode set 131 and the radial electrode set 133 are disposed in the same layer, i.e., on the same conductive layer. For example, a patterning process may be used to form the entire sensing electrode layer, then a photolithography process is used to etch the azimuthal electrode set 131, and then a corresponding radial electrode set 133 is formed in the same layer. The arrangement of the azimuth electrode set 131 and the radius electrode set 133 on the same layer can reduce the arrangement of interlayer insulating layers, which is beneficial to reducing the thickness of the self-contained touch screen 100.

It is understood that the azimuth electrode 131a of the azimuth electrode group 131 in each electrode unit 13 and the radius electrodes R1, R2 of the corresponding radius electrode group 133 are disposed at a distance from each other and insulated from each other. Meanwhile, each electrode unit 13 includes an azimuth electrode and a plurality of radius electrodes. Therefore, the coordinates of the corresponding touch points can be obtained according to the information of the two electrodes. For example, the approximate position (i.e., the orientation information) of the touch point can be determined by the azimuth electrode 131a in the electrode unit 13, and then the coordinates of the corresponding touch point can be obtained according to the radius information (e.g., the self-capacitance electric quantity change) of the radius electrodes R1 and R2 in the electrode unit 13.

It is understood that, in the present embodiment, the radial electrodes in the radial electrode group 133 have the same extension length in the radial direction. For example, the radial electrode R1 has a radial extension equal to the radial extension of the radial electrode R2.

It will be appreciated that in this embodiment, radius electrodes representing the same radius may be connected locally or wholly internally. For example, in this embodiment, all of the radius electrodes R1 are electrically connected either partially or entirely internally. All of the radius electrodes R2 are electrically connected partially or entirely internally and are provided insulated from the radius electrode R1.

It is understood that the radius electrodes R1, R2 include only radius information. Therefore, the radial electrodes representing the same radius and separated by the azimuth electrode group 131 (i.e., the azimuth electrode 131a) can be connected internally, wholly or partially, without external wiring, thereby greatly saving the number of bonding pads.

It can be understood that the self-contained touch screen 100 has a plurality of azimuth electrode sets 131 arranged along the circumferential direction. Therefore, the self-contained touch screen 100 supports real multi-touch in the direction (i.e., the circumferential direction). The number of real touch points supported by the self-contained touch screen 100 is proportional to the number of radius electrodes in the radius or diameter direction. For example, in the present embodiment, without counting the center electrode R0, since each radial electrode group 133 in the self-contained touch panel 100 is uniformly provided with two radial electrodes R1 and R2 along the radial direction, the self-contained touch panel 100 supports real two-point touch along the radial direction and supports real four-point touch along the radial direction.

It will be appreciated that since all of the electrodes, such as the azimuth electrode 131a and the radius electrodes R1 and R2, are in the form of blocks, it is convenient to wire between the electrodes.

It can be understood that, since the center of circle electrode R0 is disposed at the center of the self-contained touch screen 100, the center of circle electrode R0 can be conveniently detected at the center of the self-contained touch screen 100, for example, at the center of circle, so as to effectively improve the testing accuracy of the self-contained touch screen 100.

Referring to fig. 9, a second embodiment of the invention provides a self-contained touch screen 200. The self-contained touch screen 200 includes a center electrode R0 and a plurality of electrode units 23. Each electrode unit 23 includes an azimuthal electrode set 231 and a radial electrode set 233. Each of the radial electrode groups 233 includes two radial electrodes R1, R2 arranged in the radial direction.

In the present embodiment, the structure of the self-contained touch screen 200 is similar to that of the self-contained touch screen 100 in the first embodiment, except that the structure of the azimuth electrode set 231 in the self-contained touch screen 200 is different from that of the azimuth electrode set 131 in the first embodiment.

In the present embodiment, the azimuth electrode group 231 includes a pair of

azimuth electrodes

231a and 231b (i.e., two azimuth electrodes). In the present embodiment, the

azimuthal electrodes

231a and 231b in each azimuthal electrode group 231 are triangular in shape and complementary to each other. That is, the pair of

azimuth electrodes

231a, 231b are complementary triangular pairs. Of course, in other embodiments, the shape of the

azimuth electrodes

231a, 231b is not limited to triangular. The pair of

azimuth electrodes

231a, 231b may also be complementary polygonal pairs, for example.

It can be understood that when multiple touches occur on the same radius circle, the sensing amount of each touch point is difficult to split. Thus, in this embodiment, the azimuthal electrode group 231 is divided into two complementary triangular or polygonal electrodes. Therefore, each azimuth electrode is attached with certain radius information, and the position of the multi-finger touch can be accurately determined by combining the azimuth information of the azimuth electrode, the auxiliary radius information and the radius information of the radius electrode group 233.

Referring to fig. 10, a third embodiment of the present invention provides a self-contained touch panel 300. The self-contained touch screen 300 includes a center electrode R0 and a plurality of electrode units 33. Each electrode unit 33 comprises an azimuthal electrode set 331 and a radial electrode set 333. The azimuth electrode set 331 includes a pair of azimuth electrodes, such as two complementary

triangular azimuth electrodes

331a, 331 b. Each set 333 of radius electrodes includes two radius electrodes R1, R2 arranged in a radial direction.

In the present embodiment, the structure of the self-contained touch screen 300 is similar to the structure of the self-contained touch screen 200 in the second embodiment, except that the connection manner of the azimuth electrode set 331 in the self-contained touch screen 300 is different from the connection manner of the azimuth electrode set 231 in the second embodiment.

In this embodiment, the azimuth electrode set 331 is formed by jumping or spacing wires. For example, in the direction shown in fig. 10, the azimuth electrode 331a in one of the azimuth electrode groups 331 is driven individually, the azimuth electrode 331b in the azimuth electrode group 331 complementary to the azimuth electrode 331a is connected to the azimuth electrode 331a in the adjacent azimuth electrode group 331, and the azimuth electrode 331b in the adjacent azimuth electrode group 331 is driven individually. And so on until all the azimuth electrode sets 331 are wired.

It is understood that in the self-contained touch screen 200 shown in fig. 9, since each azimuth electrode group 231 is divided into two complementary

triangular azimuth electrodes

231a, 231b, and each pair of

complementary azimuth electrodes

231a, 231b is driven by two different wires, the number of pads required for the azimuth electrode group 231 is doubled relative to the number of pads required for the azimuth electrode group 131 shown in fig. 8. In the embodiment, the

azimuthal angle electrodes

331a or 331b in the azimuthal angle electrode set 331 are interconnected with the

azimuthal angle electrodes

331a or 331b in the adjacent azimuthal angle electrode set 331, so that the number of azimuthal angle electrodes to be driven independently is significantly reduced. For example, the self-contained touch screen 200 shown in fig. 9 requires 16 independent channels (pitch, i.e., 16 leads). The self-contained touch screen 300 shown in fig. 10 has reduced to 12 channels (i.e., 12 leads).

Referring to fig. 11a and 11b, a fourth embodiment of the invention provides a self-contained touch screen 400. The self-contained touch screen 400 includes a center electrode R0 and a plurality of electrode units 43. Each electrode unit 43 includes an azimuthal electrode set 431 and a radial electrode set 433. The azimuthal electrode group 431 includes a pair of

azimuthal electrodes

431a and 431 b. Each of the radial electrode groups 433 includes at least two radial electrodes arranged in a radial direction.

In the present embodiment, the structure of the self-contained touch screen 400 is similar to the structure of the self-contained touch screen 300 in the third embodiment, except that the structure of the radial electrode group 433 in the self-contained touch screen 400 is different from the structure of the radial electrode group 333 in the third embodiment.

Specifically, the utility model provides a touch-control error of touch-control screen can divide into radius error and circumference error. Wherein the radius error is related to the size of the radius block (i.e., the radius electrode) in the radial direction. For example, referring to fig. 8 and 9, when the radial dimension of the radial electrodes R1, R2, e.g., the length in the radial direction, is set to be the same, the error in the radial direction can be considered linear, and the radial error can be reduced by increasing the number of radial electrodes in the radial direction.

In addition, in the circumferential direction, the arc length from the center to the circumference of the electrodes R1, R2 is gradually increased due to the radius. Therefore, its circumferential error is non-linear. The arc length of the radius electrode R1 close to the center of the circle is short, and the error is small. While the radius electrode R2 near the circumference has a longer arc length and a larger error.

Therefore, in the present embodiment, each radial electrode group 433 of the self-contained touch screen 400 includes three radial electrodes, i.e., radial electrodes R1, R2, and R3. The radius electrodes R2 and R3 are disposed on the same radius and are aligned in the radial direction with the radius electrode R1. That is, the self-contained touch screen 400 is formed by adding one radius electrode R3 to the radius electrode R2 with larger circumference error, i.e., two radius electrodes R2 and R3 are disposed on the same radius. Alternatively, the self-contained touch screen 400 is formed by splitting the outermost radius electrode into a pair of sub-radius electrodes, such as radius electrodes R2 and R3. Thus, between the two azimuthal electrode sets 431, the two radial electrodes R2, R3 also carry auxiliary orientation information. Therefore, the maximum PITCH in the circumferential direction is reduced to half of the original value, the maximum arc length is reduced to half of the original value, and the circumferential error is also reduced to half of the original value.

It can be understood that, referring to fig. 11a, in the present embodiment, the shape and structure of the radius electrodes R2 and R3 are the same, i.e. they are block-shaped, such as polygonal. Of course, in other embodiments, the radius electrodes R2, R3 may have other shapes, such as a triangle (see fig. 11b), and the radius electrodes R2, R3 are complementary to each other. That is, the pair of sub-radius electrodes disposed at the outermost periphery are complementary triangular pairs or polygonal pairs.

It is understood that in the present embodiment, the radius electrodes R2 and R3 are connected in two ways, for example, a single lead line or a jumping or spacing connection line. The specific connection manner can refer to the connection manner of the

azimuth electrodes

231a and 231b in the self-contained touch screen 200 shown in fig. 9 or the connection manner of the

azimuth electrodes

331a and 331b in the self-contained touch screen 300 shown in fig. 10, which is not described herein again.

It can be understood that, referring to fig. 8 to fig. 10 together, in the present application, when the error compensation scheme described in fig. 11a and fig. 11b is not adopted, that is, the outermost radius electrode is not split into two sub-radius electrodes, the radius of the self-contained touch screen is defined as R, and L azimuth electrodes extend in the circumferential direction. Obviously, as can be seen from fig. 8, the PITCH gradually increases from the center of the circle to the outer circumference. Wherein the arc length of the PITCH at the outer circumference is

Conversely, when the maximum arc length is designated as P, L azimuthal electrodes are required to be arranged, wherein

Meanwhile, in order to realize real multi-touch, the number of the radius electrodes in each radius electrode group is assumed to be N (not including the center electrode R0).

Therefore, for the first embodiment shown in fig. 8, the number BP of pads (bonding pads) required by the self-contained touch panel 100 is BP ═ L + N. For the second embodiment shown in fig. 9, the number BP of bonding pads (bonding pads) required by the self-contained touch panel 200 is BP ═ 2 × L + N. In the third embodiment shown in fig. 10, the number BP of bonding pads (bonding pads) required by the self-contained touch panel 300 is equal to 1.5 × L + N.

Referring also to table 1, taking a two inch circle as an example, assuming a radius of 25mm and N is 3. Obviously, in the first embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, respectively, the number of channels (i.e., the number of leads) is 17, 21, and 29, respectively. In the second embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, the number of channels is 31, 40, and 55, respectively. In the third embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, the number of channels is 24, 30, and 42, respectively. It is apparent that when the third embodiment is adopted, the number of channels (number of pins) is significantly reduced as the PITCH is reduced.

TABLE 1 relationship tables of maximum PITCH size and number of channels in the first, second and third embodiments without error compensation

It can be understood that when the error compensation scheme described in fig. 11a and fig. 11b is adopted, the number BP of bonding pads (bonding pads) required by the self-capacitance touch screen 100 is equal to 0.5 × L + N +1 for the first embodiment shown in fig. 8. For the second embodiment shown in fig. 9, the number BP of bonding pads (bonding pads) required by the self-capacitance touch panel 200 is BP ═ L + N + 1. In the third embodiment shown in fig. 10, the number BP of bonding pads (bonding pads) required by the self-contained touch panel 300 is equal to 0.75 × L + N + 1.

Referring also to table 2, a two inch circle is also used as an example, assuming a radius of 25mm and N is 3. Obviously, in the first embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, respectively, the number of channels (i.e., the number of leads) is 11, 13, and 17, respectively. In the second embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, the number of channels is 18, 22, and 30, respectively. In the third embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, the number of channels is 16, 18, and 24, respectively. Obviously, when the scheme design of error compensation is adopted, the number of channels (number of lead wires) is greatly reduced along with the reduction of the PITCH.

TABLE 2 relationship tables of maximum PITCH size and number of channels in the first, second and third embodiments when an error compensation scheme is employed

Referring to fig. 12a and 12b, a fifth embodiment of the invention provides a self-contained touch screen 500. The self-contained touch panel 500 includes a center electrode R0 and a plurality of electrode units 53. Each electrode unit 53 includes an azimuthal electrode set 531 and a radial electrode set 533. Each of the azimuth electrode groups 531 includes one azimuth electrode 531 a. Each of the radial electrode groups 533 includes at least two radial electrodes arranged in a radial direction.

In the present embodiment, the structure of the self-contained touch screen 500 is similar to the structure of the self-contained touch screen 100 in the first embodiment, except that the self-contained touch screen 500 is a square or square touch screen with arc corners, that is, the conductive layer of the self-contained touch screen 500 has a square shape (see fig. 12a) or a square shape with arc corners (see fig. 12 b). Specifically, the self-contained touch screen 500 is centered at the geometric center of the square or the square with the arc angle, and draws a circle with a certain radius, for example, a half of the diagonal line of the square or the square with the arc angle. The center electrode R0 is disposed at the geometric center of the self-contained touch screen 500. The azimuthal electrode group 531 and the radial electrode group 533 are alternately arranged at intervals along the circumferential direction and are insulated and spaced apart from each other.

It can be understood that the structure of the self-contained touch screen 500 is different from the self-contained touch screen 100 in the first embodiment in that the number of the radial electrodes in each radial electrode group 533 is different. In the present embodiment, each of the radial electrode sets 533 includes three radial electrodes R1, R2, and R3 arranged along a radial direction, that is, the self-contained touch screen 500 supports real three-point touch along the radial direction.

It can be understood that, in the present embodiment, since the self-contained touch screen 500 is a square or arc-shaped square touch screen, which makes a circular sweep around the geometric center, the intersection lengths of the two are not consistent in each sweep direction. As shown in fig. 12a and 12b, the length of the radial electrode group 533 is longest in the diagonal direction, and the length of the radial electrode group 533 is shortest in the length or width direction. That is, when the electrodes are arranged as shown in fig. 12a and 12b, the length of the radial electrode group 533 varies periodically from the diagonal direction to the x (y) axis direction, thereby affecting the uniformity of the radial information.

Referring to fig. 13, a sixth embodiment of the invention provides a self-contained touch screen 600. The self-contained touch screen 600 includes a center electrode R0 and a plurality of electrode units 63. Each electrode unit 63 includes an azimuthal electrode set 631 and a radial electrode set 633. Each of the azimuth electrode groups 631 includes an azimuth electrode 631 a. Each radial electrode group 633 includes three radial electrodes R1, R2, R3 arranged in a radial direction.

It is understood that, in the present embodiment, the structure of the self-contained touch screen 600 is similar to the structure of the self-contained touch screen 500 in the fifth embodiment, except that the length configuration of the corner electrode set 631 and the radius electrode set 633 in the self-contained touch screen 600 is different from the length configuration of the corner electrode set 531 and the radius electrode set 533 in the self-contained touch screen 500. Specifically, in the present embodiment, each of the radial electrode groups 633 is configured to have an equal length, and each of the azimuthal electrode groups 631 has a different length in each direction.

Obviously, in the present embodiment, since each of the radial electrode groups 633 is configured to have an equal length, the problem of uniformity of the radial electrodes in all directions can be effectively solved. Although each of the azimuth angle electrode groups 631 has different lengths in the respective directions, since the azimuth angle electrodes 631a in the azimuth angle electrode groups 631 are dominant in the pointing direction, the influence thereof is small even if the lengths are different.

Referring to fig. 14, a seventh embodiment of the invention provides a self-contained touch screen 700. The self-contained touch screen 700 includes a center electrode R0 and a plurality of electrode units 73. Each electrode unit 73 includes an azimuthal electrode set 731 and a radial electrode set 733. Each azimuth electrode group 731 includes a pair of

azimuth electrodes

731a, 731 b.

It is understood that, in the present embodiment, the structure of the self-contained touch screen 700 is similar to that of the self-contained touch screen 200 in the second embodiment, except that the self-contained touch screen 700 is a square touch screen with arc corners, and the self-contained touch screen 700 supports real three-point touch in the radial direction (i.e., each radial electrode group 733 includes three radial electrodes R1, R2, R3 arranged in the radial direction). In addition, the self-contained touch screen 700 is different from the self-contained touch screen 200 in the second embodiment in the length configuration of the azimuth angle electrode group 731 and the radius electrode group 733 in the self-contained touch screen 700, and the detailed description can be combined with the description referring to fig. 9 and fig. 13, and is not repeated herein.

Referring to fig. 15, an eighth embodiment of the invention provides a self-contained touch screen 800. The self-contained touch panel 800 includes a center electrode R0 and a plurality of electrode units 83. Each electrode unit 83 includes an azimuthal electrode set 831 and a radial electrode set 833. Each of the azimuth electrode groups 831 includes a pair of

azimuth electrodes

831a, 831 b.

It can be understood that, in the present embodiment, the structure of the self-contained touch screen 800 is similar to the structure of the self-contained touch screen 300 in the third embodiment, except that the self-contained touch screen 800 is a square touch screen with arc corners, and the self-contained touch screen 800 supports real three-point touch in the radial direction (i.e., each radial electrode group 833 includes three radial electrodes R1, R2, R3 arranged in the radial direction). In addition, the self-contained touch screen 800 is different from the self-contained touch screen 300 in the third embodiment in that the length configuration of the azimuth electrode group 831 and the radius electrode group 833 in the self-contained touch screen 800 is different, and the detailed description can be combined with the description with reference to fig. 10 and 13, and is not repeated herein.

Referring to fig. 16a and 16b, a ninth embodiment of the invention provides a self-contained touch screen 900. The self-contained touch panel 900 includes a center electrode R0 and a plurality of electrode units 93. Each electrode unit 93 includes an azimuthal electrode set 931 and a radial electrode set 933. Each of the azimuthal electrode groups 931 includes a pair of

azimuthal electrodes

931a, 931 b.

It can be understood that, in the present embodiment, the structure of the self-contained touch screen 900 is similar to that of the self-contained touch screen 400 in the fourth embodiment shown in fig. 11a and 11b, except that the self-contained touch screen 900 is a square touch screen with arc corners, and the self-contained touch screen 900 supports real three-point touch along the radial direction. In addition, the self-contained touch screen 900 is different from the self-contained touch screen 400 in the fourth embodiment in the length configuration of the azimuth electrode assembly 931 and the radius electrode assembly 933 in the self-contained touch screen 900, and the detailed description can be combined with the description with reference to fig. 11a, fig. 11b, and fig. 13, and will not be repeated herein.

It can be understood that, referring to fig. 13 to fig. 15 together, in the present application, when the error compensation scheme described in fig. 16a and fig. 16b is not adopted, that is, the outermost radius electrode is not split into two complementary sub-radius electrodes R3 and R4, the radius of the self-contained touch screen is defined as R, and L azimuth electrodes extend along the circumferential direction. Obviously, as can be seen from fig. 13, the PITCH gradually increases from the center of the circle to the outer circumference. Wherein the arc length of the PITCH at the outer circumference is

Therefore, for the sixth embodiment shown in fig. 13, the number BP of pads (bonding pads) required by the self-contained touch panel 600 is BP ═ L + N. Referring to the seventh embodiment shown in fig. 14, the number BP of bonding pads (bonding pads) required by the self-contained touch screen 700 is BP 2 × L + N. In the eighth embodiment shown in fig. 15, the number BP of bonding pads (bonding pads) required by the self-contained touch panel 800 is equal to 1.5 × L + N.

Referring also to table 3, taking a two-inch square pattern as an example, assuming that the length (width) is 50mm, N is 3. Obviously, in the sixth embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, respectively, the number of channels (i.e., the number of leads) is 21, 26, and 36, respectively. In the seventh embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, the number of channels is 39, 50, and 70, respectively. In the eighth embodiment, when the maximum PITCH size is 11mm, 8.5mm, 6mm, respectively, the number of channels is 30, 38, 53, respectively. Obviously, when the eighth embodiment is adopted, the number of channels (number of pins) is significantly reduced as the PITCH is reduced.

TABLE 3 relationship tables of maximum PITCH size and number of channels for the sixth, seventh and eighth embodiments without error compensation

It can be understood that when the error compensation scheme described in fig. 16a and 16b is adopted, the number BP of bonding pads (bonding pads) required by the self-capacitance touch screen 600 is equal to 0.5 × L + N +1 for the sixth embodiment shown in fig. 13. For the seventh embodiment shown in fig. 14, the number BP of bonding pads (bonding pads) required by the self-contained touch panel 700 is BP ═ L + N + 1. In the eighth embodiment shown in fig. 15, the number BP of bonding pads (bonding pads) required by the self-contained touch panel 800 is equal to 0.75 × L + N + 1.

Referring also to table 4, a two-inch square pattern is also used as an example, assuming that the length (width) is 50mm and N is 3. Obviously, in the sixth embodiment, when the maximum PITCH sizes are 11mm, 8.5mm, and 6mm, respectively, the number of channels (i.e., the number of leads) is 13, 16, and 21, respectively. In the seventh embodiment, when the maximum PITCH size is 11mm, 8.5mm, and 6mm, the number of channels is 22, 28, and 37, respectively. In the eighth embodiment, when the maximum PITCH size is 11mm, 8.5mm, 6mm, respectively, the number of channels is 18, 22, 29, respectively. Obviously, when the scheme design of error compensation is adopted, the number of channels (number of lead wires) is greatly reduced along with the reduction of the PITCH.

TABLE 4 relationship tables of maximum PITCH size and number of channels for the sixth, seventh and eighth embodiments when error compensation scheme is employed

It is understood that in other embodiments, the number of azimuthal electrodes and the number of radial electrodes may be flexibly set based on the size of the radial dimension and the performance requirements.

For example, referring to fig. 17a, a tenth embodiment of the invention provides a self-contained touch screen 1000. The self-contained touch screen 1000 includes a center electrode R0 and a plurality of electrode units 103. Each electrode unit 103 comprises an azimuthal electrode set 1031 and a radial electrode set 1033. The azimuth electrode group 1031 includes a pair of

azimuth electrodes

1031a, 1031 b. Each of the radial electrode groups 1033 includes at least two radial electrodes arranged in a radial direction.

In the present embodiment, each radial electrode group 1033 of the self-contained touch screen 1000 includes five radial electrodes, i.e., radial electrodes R1, R2, R3, R4, and R5. The radius electrodes R4 and R5 are disposed on the same radius, and are arranged in the radial direction in order of the radius electrodes R1, R2, and R3. That is, the self-contained touch screen 1000 is formed by adding one radius electrode R5 to the radius electrode R4 with larger circumference error, i.e., two radius electrodes R4 and R5 are disposed on the same radius. Thus, between the two azimuthal electrode sets 1031, the two radial electrodes R4, R5 also carry auxiliary orientation information. Therefore, the maximum PITCH in the circumferential direction is reduced to half of the original value, the maximum arc length is reduced to half of the original value, and the circumferential error is also reduced to half of the original value.

Furthermore, in the present embodiment, the self-contained touch screen 1000 supports real four-point touch along the radial direction, and supports real eight-point touch along the radial direction.

For another example, referring to fig. 17b, an eleventh embodiment of the invention provides a self-contained touch screen 1100. The self-contained touch screen 1100 includes a center electrode R0 and a plurality of electrode units 113. Each electrode unit 113 includes an azimuthal electrode set 1131 and a radial electrode set 1133. The azimuthal electrode set 1131 includes an azimuthal electrode 1131 a. Each set of radial electrodes 1133 includes four radial electrodes R1, R2, R3, R4 arranged in a radial direction.

It can be understood that, in the present embodiment, the self-contained touch screen 1100 supports real four-point touch along the radial direction, and supports real eight-point touch along the radial direction.

Referring to fig. 18, a connection method of a self-contained touch screen 1200 that does not employ an error compensation scheme and supports real three-point touch along a radius direction will be briefly described.

In the present embodiment, the self-contained touch panel 1200 includes a center electrode R0 and a plurality of electrode units 123. Each electrode unit 123 includes an azimuthal electrode set 1231 and a radial electrode set 1233. Each azimuthal electrode set 1231 includes one azimuthal electrode 1231 a. Each set 1233 of radius electrodes includes three radius electrodes R1, R2, R3 arranged in a radial direction.

Wherein the radius electrodes R1 representing the same radius are internally partially or fully electrically connected. All of the radius electrodes R2 are electrically connected partially or entirely internally and are provided insulated from the radius electrode R1. All the radius electrodes R3 are electrically connected partially or totally internally and are insulated from the radius electrodes R1 and R2. All the radius electrodes are connected on the inner side near the center electrode R0.

It can be understood that the self-contained touch screen 1200 further includes a plurality of bonding pads (bonding pads) 125, a plurality of first leads 126 and a plurality of second leads 127. The pads 125 are disposed at one side of the electrode units 123. The plurality of pads 125 may be arranged in a certain direction and disposed in a corresponding bonding area (bonding area). Each first lead 126 is used to connect a corresponding set of azimuthal electrodes 1231 to a respective pad 125. Each of the second wires 127 is used to electrically connect electrodes with different radii, such as the radius electrodes R1, R2, R3 and the center electrode R0, to the corresponding pad 125.

It is understood that in this embodiment, the lead connecting the electrodes with different radii and the lead connecting the center electrode R0, such as the second lead 127, can be led out from the gap between one of the radial electrode sets 1233 and the adjacent azimuthal electrode set 1231. The lead wires, such as the first lead wire 126, connected to the azimuth electrode 1231a can be led out from the outer periphery of the self-contained touch screen 1200. Thus, the first lead 126 and the second lead 127 connected to each pad 125 are not crossed, thereby effectively avoiding the use of a bridge or multi-layer electrode structure and reducing the process difficulty.

It is understood that the pads 125 can also be electrically connected to a driving chip (not shown) through a connecting wire, so as to transmit signals between the electrode unit 123 and the driving chip, thereby implementing touch sensing.

It will be appreciated that the electrode includes only radius information as a result of the radius. Thus, radial electrodes representing the same radius and separated by the azimuthal electrode set 1231 (e.g., azimuthal electrode 1231a) can be connected internally, either entirely or locally, without the need for external routing, thereby saving significantly on the number of pads 125.

Obviously, the utility model discloses a from holding formula touch-control screen uses simplest individual layer from holding technology, can realize true multiple spot and detect, has overcome the tradition from holding and can only realize the shortcoming of single-point touch-control or two point touch-controls of subregion, has promoted the touch performance by a wide margin. Simultaneously the utility model is suitable for an on dysmorphism touch-control screen such as circular or square, for traditional adoption small square electrode, can obviously reduce the quantity of binding pad (bonding pad) to all-round promotion the individual layer is from holding the competitiveness of product in aspects such as performance, price, structural requirement.

It can be appreciated that another embodiment of the present invention further provides a touch display device. The touch display device comprises the self-contained touch screen, the display screen, the connecting line and the driving chip. The self-contained touch screen is arranged ON the display screen (ON-CELL) or integrated IN the display screen (IN-CELL), and is electrically connected with the driving chip through the connecting wire. The self-capacitance touch screen collects touch information through self-capacitance variation of touch electrodes, an azimuth electrode group and a radius electrode group which are arranged on the same layer.

The touch display device has low manufacturing cost and can effectively reduce the number of bonding pads (bonding pads) due to the adoption of the self-contained touch screen.

The touch display device is round, round-like, square or square with arc corners.

It is to be appreciated that another embodiment of the present invention further provides an electronic device. The electronic device comprises the touch display device in the embodiment. Therefore, the manufacturing cost is low, and the number of bonding pads (bonding pads) can be effectively reduced. The electronic device can be a mobile phone, a tablet computer, a watch and the like.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention. Those skilled in the art can also make other changes and the like in the spirit of the present invention, and the design of the present invention can be used as long as the technical effects of the present invention are not deviated. Such variations are intended to be included within the scope of the invention as claimed.

Claims

1. A self-contained touch screen is characterized in that: this self-contained touch screen includes:

a substrate;

2. The self-contained touch screen of claim 1, wherein: the extension length of each radius electrode in the radius electrode group along the radius direction is equal.

3. The self-contained touch screen of claim 1, wherein: radius electrodes having the same radius are partially or entirely connected together.

4. The self-contained touch screen of claim 1, wherein: the outermost radius electrode includes a pair of sub-radius electrodes that are complementary triangular or polygonal pairs driven by two different second leads.

5. The self-contained touch screen of claim 1, wherein: the radius electrode arranged at the outermost periphery comprises a pair of sub-radius electrodes which are complementary triangular pairs or polygonal pairs, wherein one sub-radius electrode is driven by a single second lead, the other sub-radius electrode is electrically connected with the adjacent sub-radius electrode in the adjacent pair of sub-radius electrodes and driven by the single second lead in common, and the other sub-radius electrode in the adjacent pair of sub-radius electrodes is driven by the single second lead.

6. The self-contained touch screen of claim 1, wherein: the first lead is led out from the outer periphery of the self-contained touch screen, and the second lead is led out from a gap between one of the radius electrode groups and the adjacent azimuth electrode group.

7. The self-contained touch screen of claim 1, wherein: the azimuth electrode group comprises a pair of azimuth electrodes, the pair of azimuth electrodes are complementary triangular pairs or polygonal pairs, and the pair of azimuth electrodes are driven by two different first leads.

8. The self-contained touch screen of claim 1, wherein: the azimuth electrode group comprises a pair of azimuth electrodes, the pair of azimuth electrodes are complementary triangular pairs or polygonal pairs, one azimuth electrode is driven by a single first lead, the other azimuth electrode is electrically connected with the adjacent azimuth electrode in the adjacent azimuth electrode group and driven by the single first lead, and the other azimuth electrode in the adjacent azimuth electrode group is driven by the single first lead.

9. The self-contained touch screen of claim 1, wherein: the self-contained touch screen further comprises a circle center electrode, when the self-contained touch screen is circular or similar to a circle, the circle center electrode is arranged at the circle center of the self-contained touch screen, a circle is drawn by the radius of the self-contained touch screen, the azimuth electrode group and the radius electrode group are arranged according to the circle center and the radius, and the second lead is further used for electrically connecting the circle center electrode to a corresponding pad.

10. The self-contained touch screen of claim 1, wherein: the self-contained touch screen further comprises a circle center electrode, when the self-contained touch screen is square or square with arc angles, the geometric center of the square is used as the circle center, a half of a diagonal line of the square is used as a radius to draw a circle, the azimuth electrode group and the radius electrode group are arranged according to the circle center and the radius, the circle center electrode is arranged at the geometric center of the self-contained touch screen, and the second lead is further used for electrically connecting the circle center electrode to a corresponding pad.

11. A touch display device is characterized in that: the touch display device comprises the self-contained touch screen as claimed in any one of claims 1 to 10, a display screen, a connecting line and a driving chip, wherein the self-contained touch screen is disposed on the display screen or integrated in the display screen, and is electrically connected to the driving chip through the connecting line.

12. The touch display device of claim 11, wherein: the touch display device is round, round-like, square or square with arc corners.