Touch control substrate, touch control display panel and touch control display device

Abstract

The present invention provides a touch control substrate, a touch control display panel, and a touch control display device. The touch control substrate includes: a substrate; a plurality of touch control electrode groups located on the substrate and arranged in an array. Each touch control electrode group includes a first electrode and a plurality of second electrodes, and the second electrodes are arranged between adjacent first electrodes. Wherein, the minimum working touch size of the first electrode and the second electrode and the touch control substrate satisfies the following constraint condition: at any position on the touch control substrate, the ratio of the overlapping area of the minimum working touch size of the touch control substrate and at least one of the second electrodes to the area of the second electrode is greater than a preset value. The electrode size design of the present invention can ensure that at any position on the touch control substrate, the overlapping area of the minimum working touch size and the electrode is greater than the preset value, thereby ensuring the detectability of touch.

Description

Technical Field

[0001] The present invention relates to the field of touch technology, and in particular, to a touch substrate, a touch display panel, and a touch display device. Background Art

[0002] Currently, in the layout of a single-layer discontinuous touch pattern, the electrodes and the traces are on the same layer. Therefore, the distance between the transmitting electrode and the receiving electrode and the selection of their sizes can make the positioning of a smaller touch have less interaction with the surrounding electrodes, resulting in weaker touch signals for mutual and self-capacitance sensing. Under low ground quality conditions, a small-sized working touch size may cause problems of touch detection failure. Summary of the Invention

[0003] The present invention provides a touch substrate, a touch display panel, and a touch display device to solve the problem that under low ground quality conditions, a small-sized working touch size may cause touch detection failure.

[0004] According to a first aspect of the present invention, there is provided a touch substrate, including: a substrate; a plurality of touch electrode groups located on the substrate and arranged in an array, each touch electrode group including a first electrode and a plurality of second electrodes, the second electrodes being arranged between adjacent first electrodes; wherein, the minimum working touch size of the first electrode and the second electrode on the touch substrate satisfies the following constraint condition: at any position on the touch substrate, the ratio of the overlapping area of the minimum working touch size of the touch substrate and at least one of the second electrodes to the area of the second electrode is greater than a preset value.

[0005] In some embodiments, when the center of the minimum working touch size is located on the column center line of the first electrode and on the horizontal symmetry axis of two adjacent second electrodes, the maximum overlapping area among the overlapping areas of the minimum working touch size and the plurality of second electrodes reaches the minimum.

[0006] In some embodiments, the constraint condition is:

[0007]

[0008]

[0009]

[0010]

[0011]

[0012] Among them, A represents the overlapping area between the minimum working touch size and two adjacent second electrodes in the same touch electrode group, θ represents the central angle corresponding to A, R represents the radius of the minimum working touch size, L represents the distance between the center of the minimum working touch size and the side of the second electrode close to the first electrode, Xwidth represents the width of the first electrode, XYGap represents the gap width between the first electrode and the second electrode, MaxArea represents the maximum overlapping area among the overlapping areas of the minimum working touch size and multiple second electrodes, YYGap represents the gap width between adjacent second electrodes, S represents the area of one second electrode, and μ represents the ratio.

[0013] In some embodiments, the first electrode is a sensing electrode and the second electrode is a driving electrode; or the first electrode is a driving electrode and the second electrode is a sensing electrode.

[0014] In some embodiments, the number of second electrodes arranged between every two adjacent first electrodes is 3 or 4.

[0015] In some embodiments, the number of second electrodes between every two adjacent first electrodes is equal.

[0016] In some embodiments, in the column direction, multiple second electrodes in every two adjacent touch electrode groups are arranged in a mirror symmetry.

[0017] In some embodiments, in each touch electrode group, the length of the first electrode in the column direction is the same as or substantially the same as the length of the area occupied by multiple second electrodes between two adjacent first electrodes in the column direction.

[0018] According to the second aspect of the present invention, the present invention provides a touch display panel, including the touch substrate described in any one of the above.

[0019] According to the third aspect of the present invention, the present invention provides a touch display device, including the above touch display panel.

[0020] Compared with the prior art, the beneficial effect of the present invention is that by designing the sizes of the first electrode and the second electrode, at any position on the touch substrate, the ratio of the overlapping area between the minimum working touch size of the touch substrate and at least one second electrode to the area of the second electrode is greater than a preset value, thereby ensuring the detectability of touch under low ground quality conditions. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a touch substrate provided by an embodiment of the present invention.

[0022] Figure 2 It is a partial schematic structural diagram of a touch electrode group provided by an embodiment of the present invention. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0024] As Figure 1 shown, an embodiment of the present invention provides a touch control substrate, including a touch control substrate 11 and a touch control electrode group 12.

[0025] A plurality of touch control electrode groups 12 are located on the substrate substrate 11 and are arranged in an array. Each touch control electrode group 12 includes a first electrode 121 and a plurality of second electrodes 122. The second electrodes 122 are arranged between adjacent first electrodes 121. One first electrode 121 corresponds to a plurality of second electrodes 122. By adopting an asymmetric electrode configuration method, the touch failure area caused by the wire routing distribution of the first electrode 121 and the second electrode 122 in the touch area can be reduced, and the requirements for electrode signal processing at both ends can also be met.

[0026] In some other embodiments, there may be a plurality of first electrodes 121 and one second electrode 122; or there may be a plurality of first electrodes 121 and also a plurality of second electrodes 122.

[0027] In the embodiment of the invention, the minimum working touch size of the first electrode 121 and the second electrode 122 and the touch control substrate satisfies the following constraint condition: at any position on the touch control substrate, the overlapping area between the minimum working touch size of the touch control substrate and at least one second electrode 122, and the area of the second electrode 122 has a ratio greater than a preset value. Wherein the radius of the minimum working touch size is less than or equal to 5 mm, and the preset value is generally greater than or equal to 14%.

[0028] The first electrode 121 is a sensing electrode, and the second electrode 122 is a driving electrode; or the first electrode 121 is a driving electrode, and the second electrode 122 is a sensing electrode.

[0029] Preferably, the number of the second electrodes 122 arranged between every two adjacent first electrodes 121 is 3 or 4, but is not limited thereto.

[0030] In the row direction, the number of the second electrodes 122 between every two adjacent first electrodes 121 is equal to ensure consistent touch sensitivity.

[0031] In the column direction, multiple second electrodes 122 in every two adjacent touch electrode groups 12 are arranged in mirror symmetry or the same arrangement. The same second electrodes 122 are connected to the pads using the same lead wire, realizing a non-orthogonal or discontinuous single-layer sensor pattern design to reduce the number of pads and simplify the scalability of the sensor.

[0032] Optionally, in each touch electrode group 12, the length of the first electrode 121 in the column direction is the same as or approximately the same as the length of the area occupied by multiple second electrodes 122 in the column direction between two adjacent first electrodes 121, to ensure that the first electrode 121 and the second electrode 122 effectively cover the touch area and improve touch sensitivity.

[0033] Refer to Figure 2 As shown, when the center of the minimum working touch size is located on the column center line of the first electrode and on the horizontal symmetry axis of two adjacent second electrodes, the maximum overlapping area among the overlapping areas of the minimum working touch size and multiple second electrodes reaches the minimum. As long as in this case, at any position on the touch substrate, the ratio of the overlapping area of the minimum working touch size of the touch substrate and a second electrode to the area of the second electrode is greater than a preset value, the detectability of touch under low ground quality conditions can be ensured.

[0034] Wherein the constraint condition is:

[0035]

[0036]

[0037]

[0038]

[0039]

[0040] Wherein, A represents the overlapping area of the minimum working touch size and two adjacent second electrodes in the same touch electrode group, θ represents the central angle corresponding to A, R represents the radius of the minimum working touch size, L represents the distance between the center of the minimum working touch size and the side of the second electrode close to the first electrode, Xwidth represents the width of the first electrode, XYGap represents the gap width between the first electrode and the second electrode, MaxArea represents the maximum overlapping area among the overlapping areas of the minimum working touch size and multiple second electrodes, YYGap represents the gap width between adjacent second electrodes, S represents the area of a second electrode, and μ represents the ratio.

[0041] The electrode size that meets the above constraints can ensure that at any position on the touch substrate under the condition of low ground mass (LGM), the overlapping area between the minimum working touch size and the electrode is greater than a preset value, thereby ensuring the detectability of touch.

[0042] In another embodiment of the present invention, a touch display panel is further provided. The touch display panel includes the touch substrate described in the above embodiment, and a display module is further disposed between the substrate and the touch unit to achieve the touch display function. Since the touch substrate in the above embodiment, according to the touch substrate of the embodiment of the present invention, by designing the sizes of the first electrode and the second electrode, at any position on the touch substrate, the ratio of the overlapping area between the minimum working touch size of the touch substrate and at least one second electrode to the area of the second electrode is greater than a preset value, thereby ensuring the detectability of touch under the condition of low ground mass. The touch display panel in this embodiment also has the above beneficial effects. To avoid repetition, it will not be described in detail here.

[0043] In still another embodiment of the present invention, a touch display device is further provided. The touch display device includes the touch display panel described in the above embodiment, and the touch display device also has the beneficial effects of the above touch display panel. To avoid repetition, it will not be described in detail here.

[0044] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0045] The above has introduced in detail a touch substrate, a touch display panel, and a touch display device provided by the embodiments of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present invention; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A touch substrate, characterized in that, Comprising: A substrate; A plurality of touch electrode groups, which are located on the substrate and are arranged in an array. Each touch electrode group includes a first electrode and a plurality of second electrodes, and the second electrodes are arranged between adjacent first electrodes; Wherein, the minimum working touch size of the first electrode and the second electrode on the touch substrate satisfies the following constraint condition: at any position on the touch substrate, the ratio of the maximum overlapping area between the minimum working touch size of the touch substrate and at least one of the second electrodes to the area of the second electrode is greater than a preset value; When the center of the minimum working touch size is located on the column center line of the first electrode and on the horizontal symmetry axis of two adjacent second electrodes, the maximum overlapping area among the overlapping areas between the minimum working touch size and the plurality of second electrodes reaches the minimum.

2. The touch control substrate according to claim 1, wherein The constraint condition is: Wherein, A represents the overlapping area between the minimum working touch size and two adjacent second electrodes in the same touch electrode group, θ represents the central angle corresponding to A, R represents the radius of the minimum working touch size, L represents the distance between the center of the minimum working touch size and the side of the second electrode close to the first electrode, Xwidth represents the width of the first electrode, XYGap represents the gap width between the first electrode and the second electrode, MaxArea represents the maximum overlapping area among the overlapping areas between the minimum working touch size and the plurality of second electrodes, YYGap represents the gap width between adjacent second electrodes, S represents the area of a second electrode, and μ represents the ratio.

3. The touch control substrate according to claim 1, wherein The first electrode is a sensing electrode and the second electrode is a driving electrode; or the first electrode is a driving electrode and the second electrode is a sensing electrode.

4. The touch control substrate according to claim 1, wherein The number of second electrodes arranged between every two adjacent first electrodes is 3 or 4.

5. The touch control substrate according to claim 1, wherein In the row direction, the number of second electrodes between every two adjacent first electrodes is equal.

6. The touch control substrate according to claim 1, wherein, In the column direction, the plurality of second electrodes in every two adjacent touch electrode groups are arranged in mirror symmetry.

7. The touch control substrate according to claim 1, wherein In each touch electrode group, the length of the first electrode in the column direction is the same as or approximately the same as the length of the area occupied by the plurality of second electrodes between two adjacent first electrodes in the column direction.

8. A touch display panel, characterized in that, Comprising the touch substrate according to any one of claims 1-7.

9. A touch display device, characterized in that, Comprising the touch display panel according to claim 8.

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