CN212586866U - Touch sensing layer and touch panel - Google Patents

Abstract

A touch sensing layer and a touch panel are provided. The first axial conductive unit extends substantially along a first axial direction. The second shaft conductive unit extends along the second axial direction substantially and comprises two conductive electrodes and a conductive bridge. The two conductive electrodes are respectively positioned on two opposite sides of the first shaft conductive unit. The conductive bridge spans the first axis conductive unit and is connected with the two conductive electrodes. The dummy electrode includes at least a portion located in a gap formed between the first axis conductive unit and one of the two conductive electrodes. Therefore, the touch refresh rate of the touch panel can be effectively improved.

Description

Touch sensing layer and touch panel

Technical Field

The utility model relates to a touch-control sensing layer and touch panel.

Background

With the ever-expanding size and the indispensable trend in game applications, the most critical change of touch display devices is the increasing display refresh rate of the display module. For example, the display refresh rate of the display module of the mobile phone will be increased from 120Hz to 180Hz, or even higher order 240 Hz. Correspondingly, the touch refresh rate of the touch module is also required to be synchronously increased.

In terms of the principle of the touch refresh rate, the driving speed of the touch module is mainly considered as the value of two adjacent mutual capacitances (Cm) between the driving electrode (Tx) and the receiving electrode (Rx). More specifically, the driving speed per electrode scan is determined by the charging and discharging speed, and in the case of a touch module, the driving speed depends on the RC value. The smaller the RC value is, the faster the charging and discharging speed is (namely, the higher the touch refresh rate is); the larger the RC value is, the slower the charging and discharging speed is (i.e., the lower the touch refresh rate is). For the conventional architecture using Tx and Rx interleaving and bridging design, the distance between two adjacent Tx and Rx is extremely close, and there is a large Cm value, so that the touch refresh rate is low and cannot be effectively improved.

Therefore, how to provide a touch sensing layer and a touch panel capable of solving the above problems is one of the problems that the industry needs to invest in research and development resources to solve.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a touch sensing layer and a touch panel capable of solving the above problems.

In order to achieve the above objects, according to one embodiment of the present invention, a touch sensing layer includes a first shaft conductive unit, a second shaft conductive unit and at least one dummy electrode. The first axial conductive unit extends substantially along a first axial direction. The second shaft conductive unit extends along the second axial direction substantially and comprises two conductive electrodes and a conductive bridge. The two conductive electrodes are respectively positioned on two opposite sides of the first shaft conductive unit. The conductive bridge spans the first axis conductive unit and is connected with the two conductive electrodes. The dummy electrode includes at least a portion located in a gap formed between the first axis conductive unit and one of the two conductive electrodes.

In one or more embodiments of the present invention, the dummy electrode includes a body portion and an extension portion. The body portion is arranged in the second axial direction with the first axial conductive unit and is arranged in the first axial direction with the aforementioned one of the two conductive electrodes. The extension portion is connected with the body portion and extends into the gap.

In one or more embodiments of the present invention, the extension portion is a long strip.

In one or more embodiments of the present invention, an end of the extension portion away from the main body portion has an end surface.

In one or more embodiments of the present invention, the dummy electrode includes two main bodies and an extension portion. The two body parts are respectively positioned at two opposite sides of the two conductive electrodes. The extension part is connected with the body part and penetrates through the gap.

In one or more embodiments of the present invention, the extension portion is arranged between the two conductive electrodes in the second axial direction.

In one or more embodiments of the present invention, the dummy electrode is arranged between the two conductive electrodes in the second axial direction.

In one or more embodiments of the present invention, the number of the dummy electrodes is plural. The dummy electrodes are arranged along the gap.

In one or more embodiments of the present invention, the number of the dummy electrodes is plural. The dummy electrodes are arranged from one boundary of the gap to the other.

In order to achieve the above object, according to one embodiment of the present invention, a touch panel includes a substrate and the touch sensing layer. The touch sensing layer is arranged on the substrate.

In summary, in the utility model discloses an in the touch-control sensing layer, through set up virtual electrode between the electrically conductive unit of primary shaft and secondary shaft to make at least some of virtual electrode be located the clearance that forms between the electrically conductive unit of primary shaft and the electrically conductive unit of secondary shaft, can reduce mutual capacitance (Cm) value between the electrically conductive unit of primary shaft and the electrically conductive unit of secondary shaft effectively, and then the RC value is transferred and falls, thereby promotes touch-control panel's touch-control refresh rate effectively.

The above description is only for the purpose of illustrating the problems to be solved, the technical means for solving the problems, the efficacy of the invention, and the like, and the details of the present invention will be described in detail in the following embodiments and the related drawings.

Drawings

In order to make the aforementioned and other objects, features, advantages and embodiments of the invention more comprehensible, the following description is given:

fig. 1 is a schematic cross-sectional view illustrating a touch panel according to an embodiment of the present invention;

fig. 2 is a partial front view illustrating a touch sensing layer according to an embodiment of the present invention;

fig. 3 is a partially enlarged front view illustrating a touch sensing layer according to an embodiment of the present invention;

fig. 4 is a partially enlarged front view illustrating a touch sensing layer according to another embodiment of the present invention;

fig. 5 is a partially enlarged front view illustrating a touch sensing layer according to another embodiment of the present invention;

fig. 6 is a partially enlarged front view illustrating a touch sensing layer according to another embodiment of the present invention;

fig. 7 is a partially enlarged front view illustrating a touch sensing layer according to another embodiment of the present invention.

[ notation ] to show

100 touch panel

110 base plate

111 touch control area

112 peripheral area

120 shielding layer

130 optical matching layer

140,240,340,440,540 touch sensing layer

141 first axis conductive unit

142 second shaft conductive unit

142a conductive electrode

142b conductive bridge

143 first insulating layer

144,244,344,444a,444b,544a,544b dummy electrodes

144a,244a,344a body portion

144b,244b,344b extension

150 routing

160 second insulating layer

170 protective layer

180 flexible circuit board

244b1 end face

A1 first axial direction

A2 second axial direction

B1, B2 boundary

E1, E2 terminal

G is clearance

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.

Fig. 1 is a schematic cross-sectional view illustrating a touch panel 100 according to an embodiment of the present invention. As shown in fig. 1, in the present embodiment, the touch panel 100 includes a substrate 110, a shielding layer 120, an optical matching layer 130, and a plurality of traces 150. The substrate 110 defines a touch area 111 and a peripheral area 112 surrounding the touch area 111. The shielding layer 120 is disposed in the peripheral region 112 of the substrate 110. The optical matching layer 130 is disposed on the substrate 110 and covers the shielding layer 120 to provide a flat upper surface. The trace 150 is disposed on the optical matching layer 130 and located in the peripheral region 112 of the substrate 110. Therefore, when viewed from the bottom surface of the substrate 110, the shielding layer 120 can shield the trace 150 from the viewer.

Fig. 1 is a partial front view of a touch sensing layer 140 according to an embodiment of the present invention. As shown in fig. 1 and fig. 2, the touch panel 100 further includes a touch sensing layer 140. The touch sensing layer 140 is disposed on the optical matching layer 130 on the substrate 110 and includes a plurality of first axis conductive units 141, a plurality of second axis conductive units 142, a first insulating layer 143, and a plurality of dummy electrodes 144. The first axis conductive units 141 substantially extend along the first axial direction a1, and are separated from each other in the touch area 111. The second axis conductive elements 142 substantially extend along the second axial direction a2, and are separated from each other in the touch area 111 and cross the first axis conductive elements 141. In other words, the first shaft conductive elements 141 are conductive traces extending along the first axial direction a1 and are arranged at intervals. The second shaft conductive elements 142 are conductive traces extending along the second axial direction a2 and are arranged at intervals. In some embodiments, the first axial direction a1 and the second axial direction a2 are perpendicular to each other, but the invention is not limited thereto.

In addition, the second shaft conductive unit 142 crosses over the first shaft conductive unit 141 from above, and the first insulating layer 143 at least electrically insulates at an intersection between the first shaft conductive unit 141 and the second shaft conductive unit 142. Therefore, the first axis conductive unit 141 and the second axis conductive unit 142 are separated by the first insulating layer 143 to form a bridge-like structure, and thus the touch panel 100 of the present embodiment is an ogs (one Glass solution) type touch module.

Specifically, each second shaft conductive unit 142 includes a plurality of conductive electrodes 142a and a plurality of conductive bridges 142 b. The conductive electrodes 142a and the conductive bridges 142b are alternately connected along the second axial direction a 2. Each second axis conductive element 142 spans the first axis conductive element 141 by a conductive bridge 142 b. The first insulating layer 143 is disposed between the first shaft conductive unit 141 and the conductive bridge 142b, so as to electrically insulate the first shaft conductive unit 141 from the second shaft conductive unit 142.

As shown in fig. 1, the touch panel 100 further includes a second insulating layer 160 (also functioning as a second optical matching layer, described later), a protective layer 170, and a flexible printed circuit board 180. The second insulating layer 160 covers the second shaft conductive unit 142. The protective layer 170 covers the second insulating layer 160. The flexible circuit board 180 is connected to the trace 150 located in the peripheral region 112, and extracts the touch signal of the touch sensing layer 140 through the trace 150.

In some embodiments, the material of the substrate 110 includes glass, but the invention is not limited thereto.

Fig. 3 is a partially enlarged front view of the touch sensing layer 140 according to an embodiment of the present invention. Fig. 3 shows a first axis conductive unit 141, two conductive electrodes 142a and a conductive bridge 142b of a second axis conductive unit 142, and a plurality of dummy electrodes 144. The two conductive electrodes 142a are respectively located on two opposite sides of the first axial conductive unit 141. The conductive bridge 142b crosses the first axis conductive unit 141 and is connected to the two conductive electrodes 142 a. The dummy electrode 144 includes at least a portion located in the gap G formed between the first axis conductive unit 141 and the conductive electrode 142 a. In some embodiments, the gap G formed between the first axis conductive element 141 and the conductive electrode 142a may be defined as a narrow channel formed by the conductive electrode 142a and the first axis conductive element 141, wherein one end of the conductive electrode 142a close to the first axis conductive element 141 and the narrow channel are jointly pinched, and the narrow channel communicates with two opposite sides of the conductive electrode 142 a.

Specifically, as shown in fig. 3, the gap G formed between the first shaft conductive unit 141 and the conductive electrode 142a has two ends E1 and E2 (shown by dashed lines in the figure), and the two ends E1 and E2 are located at the position where the distance between the first shaft conductive unit and the conductive electrode begins to decrease, so that the gap G has the shape of the aforementioned narrow channel at the position between the two ends E1 and E2.

In the present embodiment, the dummy electrode 144 includes a body portion 144a and an extension portion 144 b. The body portion 144a is located outside the gap G, aligned with the first axial conductive element 141 in the second axial direction a2, and aligned with the conductive electrode 142a in the first axial direction a 1. The extension portion 144b is connected to the body portion 144a and extends into the gap G. In detail, the extension portion 144b is arranged between the two conductive electrodes 142a in the second axial direction a 2. In view of appearance, the main body 144a can be regarded as an island structure separated from the first shaft conductive unit 141 and the second shaft conductive unit 142, and the extension portion 144b can be regarded as a peninsula structure extending from the main body 144 a.

With the above-mentioned structure configuration, the extending portion 144b of the dummy electrode 144 located in the gap G can effectively reduce a mutual capacitance (Cm) between the first axis conductive unit 141 and the second axis conductive unit 142, so as to reduce an RC value (which affects a touch refresh rate), thereby effectively increasing the touch refresh rate of the touch panel 100. In addition, by disposing the dummy electrode 144 between the first axis conductive unit 141 and the second axis conductive unit 142, the visual effect (e.g., an ablation line) of the touch panel 100 can be effectively improved.

In practical applications, the shape and structure of the dummy electrode 144 may be applied to all the dummy electrodes 144 adjacent to the intersection between the first axis conductive unit 141 and the second axis conductive unit 142.

In some embodiments, as shown in fig. 3, an end of the extending portion 144b away from the main body portion 144a has a sharp corner, but the present invention is not limited thereto.

Fig. 4 is a partially enlarged front view illustrating a touch sensing layer 240 according to another embodiment of the present invention. Fig. 4 shows a first shaft conductive unit 141, two conductive electrodes 142a and a conductive bridge 142b of a second shaft conductive unit 142, and a plurality of dummy electrodes 244, wherein the first shaft conductive unit 141 and the second shaft conductive unit 142 are the same as or similar to the embodiment shown in fig. 3, and therefore, the related description can be referred to and will not be repeated herein. In addition, the dummy electrode 244 includes a body portion 244a and an extension portion 244 b. The body portion 244a is located outside the gap G, aligned with the first axial conductive element 141 in the second axial direction a2, and aligned with the conductive electrode 142a in the first axial direction a 1. The extension portion 244b is connected to the body portion 244a and extends into the gap G.

It should be noted that, compared to the embodiment shown in fig. 3, the embodiment is modified with respect to the shape of the dummy electrode 144. Specifically, the end of the extension 244b distal from the body portion 244a has an end face 244b 1. In other words, the end of the extension portion 244b away from the main body portion 244a has a certain width, and the extension portion 244b is elongated. Therefore, the extension portion 244b can be further inserted into the gap G, so as to further reduce the Cm value between the first shaft conductive unit 141 and the second shaft conductive unit 142, and further reduce the RC value.

Fig. 5 is a partially enlarged front view of a touch sensing layer 340 according to another embodiment of the present invention. Fig. 5 shows a first shaft conductive unit 141, two conductive electrodes 142a and a conductive bridge 142b of a second shaft conductive unit 142, and a plurality of dummy electrodes 344, wherein the first shaft conductive unit 141 and the second shaft conductive unit 142 are the same as or similar to the embodiment shown in fig. 3, and therefore, the foregoing description may be referred to and will not be repeated herein. It should be noted that, compared to the embodiment shown in fig. 3, the embodiment is modified with respect to the shape of the dummy electrode 144.

Specifically, in the present embodiment, the dummy electrode 344 includes two main portions 344a and an extension portion 344 b. The two body parts 344a are respectively located on two opposite sides of the two conductive electrodes 142 a. The extension 344b is connected to the body 344a and penetrates the gap G. Therefore, the first shaft conductive unit 141 and the conductive electrode 142a are completely separated from the two opposite sides of the extension portion 344b, so that the Cm value between the first shaft conductive unit 141 and the second shaft conductive unit 142 can be further reduced, and the RC value can be further reduced.

Fig. 6 is a partially enlarged front view illustrating a touch sensing layer 440 according to another embodiment of the present invention. Fig. 6 shows a first axis conductive unit 141, two conductive electrodes 142a and a conductive bridge 142b of a second axis conductive unit 142, and a plurality of dummy electrodes 444a and 444b, wherein the first axis conductive unit 141 and the second axis conductive unit 142 are the same as or similar to the embodiment shown in fig. 3, and therefore, reference may be made to the related description, which is not repeated herein. It should be noted that, compared to the embodiment shown in fig. 3, the embodiment is modified with respect to the shape of the dummy electrode 144.

Specifically, in the present embodiment, the dummy electrode 444a is located outside the gap G, and the dummy electrode 444b is located inside the gap G. The dummy electrode 444b located in the gap G is arranged between the two conductive electrodes 142a in the second axial direction a2 and is arranged along the gap G. From the appearance, the dummy electrode 444a located outside the gap G can be regarded as an island structure separated from the first axis conductive unit 141 and the second axis conductive unit 142, and the dummy electrode 444b located inside the gap G can be regarded as an island structure.

Fig. 7 is a partially enlarged front view of a touch sensing layer 540 according to another embodiment of the present invention. Fig. 7 shows a first axis conductive unit 141, two conductive electrodes 142a and a conductive bridge 142b of a second axis conductive unit 142, and a plurality of dummy electrodes 544a and 544b, wherein the first axis conductive unit 141 and the second axis conductive unit 142 are the same as or similar to the embodiment shown in fig. 3, and therefore, reference may be made to the foregoing description, which is not repeated herein. It should be noted that, compared to the embodiment shown in fig. 3, the embodiment is modified with respect to the shape of the dummy electrode 144.

Specifically, in the present embodiment, the dummy electrode 544a is located outside the gap G, and the dummy electrode 544b is located inside the gap G. The dummy electrodes 544B located in the gap G are arranged from one boundary B1 to the other boundary B2 of the gap G. In other words, in the gap G, the first axial conductive unit 141 and the conductive electrode 142a are separated by two dummy electrodes 544 b. Therefore, the Cm value between the first shaft conductive unit 141 and the second shaft conductive unit 142 can be further reduced, and the RC value can be adjusted and reduced.

By the above to the utility model discloses a detailed description of specific implementation mode can obviously see out, in the utility model discloses an in the touch-control sensing layer, through set up virtual electrode between the electrically conductive unit of primary shaft and secondary shaft to make at least some of virtual electrode be located the clearance that forms between the electrically conductive unit of primary shaft and secondary shaft, can reduce the Cm value between the electrically conductive unit of primary shaft and secondary shaft effectively, and then transfer and fall the RC value, thereby promote touch-control panel's touch-control refresh rate effectively.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims (10)

1. A touch sensing layer, comprising:

a first axial conductive unit extending along a first axial direction;

a second shaft conductive unit extending along a second axial direction and comprising:

two conductive electrodes respectively located on two opposite sides of the first shaft conductive unit; and

a conductive bridge spanning the first axis conductive unit and connected with the two conductive electrodes; and

at least one dummy electrode including at least a portion positioned in a gap formed between the first axial conductive unit and one of the two conductive electrodes.

2. The touch sensing layer of claim 1, wherein the at least one dummy electrode comprises:

a main body part arranged with the first axial conductive unit in the second axial direction and arranged with the one of the two conductive electrodes in the first axial direction; and

an extension part connected with the body part and extending into the gap.

3. The touch sensing layer of claim 2, wherein the extension portion is elongated.

4. The touch sensing layer of claim 2, wherein an end of the extension portion away from the main body has an end surface.

5. The touch sensing layer of claim 1, wherein the at least one dummy electrode comprises:

two body parts respectively located on two opposite sides of the two conductive electrodes; and

an extension part connected with the body parts and penetrating through the gap.

6. The touch sensing layer according to claim 2 or 5, wherein the extension portion is arranged between the two conductive electrodes in the second axial direction.

7. The touch sensing layer of claim 1, wherein the at least one dummy electrode is arranged between the two conductive electrodes in the second axial direction.

8. The touch sensing layer of claim 1, wherein the number of the at least one dummy electrode is plural, and the dummy electrodes are arranged along the gap.

9. The touch sensing layer of claim 1, wherein the number of the at least one dummy electrode is plural, and the dummy electrodes are arranged from one boundary of the gap to another boundary.

10. A touch panel, comprising:

a substrate; and

a touch sensing layer according to any one of claims 1 to 9 disposed on the substrate.

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