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 units arranged in an array on the substrate, each touch control unit including at least two first electrodes and at least two second electrodes arranged at intervals, and within the same touch control unit, the at least two second electrodes are all located between the at least two first electrodes, and no second electrode is provided between two adjacent touch control units in the same row. According to the touch control substrate of the embodiment of the present invention, since the second electrodes within the same touch control unit are located between the first electrodes, there is no second electrode between the first electrodes of adjacent touch control units, thereby achieving the same coupling ratio of mutual capacitance and self-capacitance between electrodes at any position and ensuring the touch sensitivity.

Description

Technical Field

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

[0002] Currently, in the layout of a single-layer touch pattern, touch electrodes are distributed in a touch area and a transition area. Since the coupling strength between the electrodes in the touch area and the transition area is different, it directly affects the touch sensitivity. That is to say, the inconsistent coupling strength between the electrodes will affect the touch position accuracy, linear response and signal-to-noise ratio. Summary of the Invention

[0003] In view of this, the present invention provides a touch substrate, a touch display panel and a touch display device, which can solve the problem that the coupling strength between the electrodes in the touch area and the transition area in the electrode arrangement of the prior art is inconsistent, thus affecting the touch sensitivity.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A first aspect embodiment of the present invention provides a touch substrate, which includes:

[0006] A substrate;

[0007] A plurality of touch units arranged in an array on the substrate, each touch unit includes at least two first electrodes and at least two second electrodes arranged at intervals. In the same touch unit, the at least two second electrodes are both located between the at least two first electrodes, and no second electrode is provided between two adjacent touch units in the same row.

[0008] Optionally, at least two first electrodes in the same touch unit are arranged at intervals in the row direction.

[0009] Optionally, in the same touch unit, at least two second electrodes are included between two adjacent first electrodes, and the at least two second electrodes between two adjacent first electrodes are arranged at intervals in the column direction.

[0010] Optionally, in the same touch unit, 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 at least two second electrodes between two adjacent first electrodes in the column direction.

[0011] Optionally, in the same touch unit, the number of second electrodes between every two adjacent first electrodes is equal.

[0012] Optionally, the number of second electrodes arranged between every two adjacent first electrodes in the touch unit is 3.

[0013] Optionally, the number of the second electrodes arranged between every two adjacent first electrodes in the touch unit is four.

[0014] Optionally, the first electrode is a driving electrode and the second electrode is a sensing electrode, or the first electrode is a sensing electrode and the second electrode is a driving electrode.

[0015] An embodiment of the second aspect of the present invention further provides a touch display panel, which includes the touch substrate as described in the embodiment of the first aspect.

[0016] An embodiment of the third aspect of the present invention further provides a touch display device, which includes the touch display panel as described in the embodiment of the second aspect.

[0017] The beneficial effects of the above technical solutions of the present invention are as follows:

[0018] According to the touch substrate of the embodiment of the present invention, since the second electrodes in the same touch unit are located between the first electrodes, there are no second electrodes between the first electrodes of adjacent touch units. Thus, the coupling ratios of the mutual capacitance and the self-capacitance between the electrodes at any position are the same, ensuring the touch sensitivity. Description of the Drawings

[0019] Figure 1 is a schematic diagram of nodes in a single-layer touch in the prior art;

[0020] Figure 2 is a schematic layout diagram of single-layer touch electrodes in the prior art;

[0021] Figure 3 is a schematic structural diagram of a touch substrate provided by an embodiment of the present invention. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the protection scope of the present invention.

[0023] Please refer to Figure 1 , which is a schematic diagram of nodes in a single-layer touch in the prior art. As Figure 1As shown, in a discontinuous single-layer touch design, a common touch unit includes a driving electrode T1 and three sensing electrodes (R1 to R3). That is to say, within one touch unit, one driving electrode corresponds to three sensing electrodes, and a node 11 is formed between the driving electrode and one sensing electrode.

[0024] Please refer to Figure 2 , which is a schematic diagram of the arrangement of single-layer touch electrodes in the prior art. As Figure 2 shown, in an existing single-layer touch electrode arrangement design, a touch unit is composed of 4 driving electrodes TX0 and 16 sensing electrodes (RX0 to RX15). Similarly, a touch unit is composed of 4 driving electrodes TX1 and 16 sensing electrodes (RX0 to RX15), a touch unit is composed of 4 driving electrodes TX2 and 16 sensing electrodes (RX0 to RX15), and a touch unit is composed of 4 driving electrodes TX3 and 16 sensing electrodes (RX0 to RX15); and a transition region 21 is provided between two adjacent touch units in the same row. In the transition region 21, the two touch units are coupled through 4 sensing electrodes (RX12 to RX15). Taking the touch unit where the driving electrode TX0 is located as an example, outside the transition region 21, the sensing electrodes RX0 to RX11 are respectively coupled to the driving electrodes TX0 on both sides, that is, each of the sensing electrodes RX0 to RX11 is coupled to two driving electrodes TX0, while in the transition region 21, the sensing electrodes RX12 to RX15 are only coupled to one side of the driving electrode TX0, that is, each of the sensing electrodes RX12 to RX15 is only coupled to one driving electrode TX0. That is to say, within this touch unit, the coupling ratio between the driving electrode and the sensing electrode in the region outside the transition region 21 and the transition region 21 is 1:2. Similarly, the same is true for other touch units; this will result in uneven coupling of the mutual capacitance and self-capacitance between the driving electrode and the sensing electrode, thereby making the touch sensitivity of the touch area inconsistent.

[0025] Therefore, please refer to Figure 3 , which is a schematic diagram of the structure of a touch substrate provided by an embodiment of the present invention. As Figure 3As shown in the figure, the touch substrate provided by the embodiment of the present invention may include: a substrate; a plurality of touch units located on the substrate, and the plurality of touch units may be arranged in an array on one side of the substrate; wherein, each touch unit includes at least two first electrodes and at least two second electrodes arranged at intervals, and, within the same touch unit, the at least two second electrodes are all located between the at least two first electrodes, and no second electrode is provided between two adjacent touch units in the same row; that is to say, at least two first electrodes in each touch unit are arranged at intervals, while the second electrodes are located between two adjacent first electrodes, and the arrangement of the second electrodes between two adjacent touch units in the same row is cancelled; thus, between two adjacent touch units, within the transition region 31, two first electrodes are directly adjacent, that is, no second electrode is provided between the two first electrodes, so that within the same touch unit, each second electrode can be coupled with the first electrodes on both sides, and thus, the coupling ratio between the first electrode and the second electrode at any position is 1:1, that is, the coupling of the self-capacitance and mutual capacitance between the first electrode and the second electrode is evenly distributed, ensuring the consistency of the touch sensitivity of the touch area.

[0026] In some embodiments of the present invention, optionally, at least two first electrodes within the same touch unit are arranged at intervals in the row direction, that is to say, within the same touch unit, all the first electrodes are located in the same direction (row direction) and are arranged at intervals.

[0027] In other embodiments of the present invention, optionally, between two adjacent first electrodes within the same touch unit, there are at least two second electrodes, and the at least two second electrodes between two adjacent first electrodes are arranged at intervals in the column direction. That is to say, within the same touch unit, there are at least two second electrodes between each two adjacent first electrodes, and the at least two second electrodes arranged between two adjacent first electrodes are arranged at intervals in the column direction, wherein the column direction is perpendicular to the row direction. Thus, within the same touch unit, each first electrode corresponds to at least two second electrodes, that is, an asymmetric electrode configuration method is adopted, which can reduce the touch failure area caused by the wiring distribution of the first electrode and the second electrode in the touch area, and can also meet the requirements of electrode signal processing at both ends.

[0028] In an embodiment of the present invention, optionally, within the same touch unit, the length of the first electrode in the column direction is the same as or substantially the same as the length of the region occupied by at least two second electrodes in the column direction between two adjacent first electrodes. That is to say, the length of the region occupied by at least two second electrodes in the column direction between two adjacent first electrodes may be equal to the length of the first electrode in the column direction, or may be slightly less than the length of the first electrode in the column direction, thereby avoiding the problem that the second electrode protrudes beyond the first electrode in the column direction, which makes it inconvenient to arrange the touch units in the column direction. And being substantially the same can also ensure that the first electrode and the second electrode effectively cover the touch area and improve the touch sensitivity.

[0029] In an embodiment of the present invention, optionally, the number of second electrodes between every two adjacent first electrodes is equal. That is to say, within each touch unit, the number of second electrodes between two adjacent first electrodes is equal to ensure consistent touch sensitivity. In an optional implementation manner, in the touch unit, the number of second electrodes arranged between every two adjacent first electrodes is 3, that is, one first electrode corresponds to 3 second electrodes; in another optional implementation manner, in the touch unit, the number of second electrodes arranged between every two adjacent first electrodes is 4, that is, one first electrode corresponds to 4 second electrodes. Of course, it can be known that under the concept of the present invention, one first electrode can also correspond to 2 second electrodes, 5 second electrodes, 6 second electrodes, etc., and the present invention does not make specific limitations.

[0030] In an embodiment of the present invention, optionally, the first electrode can be a driving electrode, and the second electrode is an induction electrode, or the first electrode can be an induction electrode, and the second electrode is a driving electrode.

[0031] Exemplarily, as Figure 3 shown, Figure 3 includes four touch units, the first electrodes TX0 - TX3, and the second electrodes RX0 - RX15, forming an arrangement where one first electrode corresponds to four second electrodes. Thus, equal mutual capacitances exist at all nodes, and each second electrode has an equal self - capacitance.

[0032] For the touch substrate according to an embodiment of the present invention, since the second electrodes within the same touch unit are located between the first electrodes, there are no second electrodes between the first electrodes of adjacent touch units. Thus, the coupling ratio of the mutual capacitance and the self - capacitance between the electrodes at any position is 1, ensuring the touch sensitivity.

[0033] Another embodiment of the present invention further provides a touch display panel, which includes the touch substrate described in the above embodiment. A display module is further disposed between the substrate and the touch unit to achieve the touch display function. Since in the touch substrate in the above embodiment, the coupling of the self-capacitance and the mutual capacitance between the first electrode and the second electrode is evenly distributed, ensuring the consistency of the touch sensitivity in the touch area, the touch display panel in this embodiment also correspondingly has the above beneficial effects. To avoid repetition, they will not be elaborated here.

[0034] Another embodiment of the present invention further provides a touch display device, which includes the touch display panel described in the above embodiment. The touch display device also has the beneficial effects of the above touch display panel. To avoid repetition, they will not be elaborated here.

[0035] The above are some embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A touch substrate, characterized in that, Comprising: A substrate; A plurality of touch units arranged in an array on the substrate, each touch unit including at least two first electrodes and at least two second electrodes arranged at intervals. Within the same touch unit, the at least two second electrodes are all located between the at least two first electrodes, and no second electrodes are provided between two adjacent touch units in the same row; The at least two first electrodes within the same touch unit are arranged at intervals in the row direction; Within the same touch unit, at least two second electrodes are included between two adjacent first electrodes, and the at least two second electrodes between two adjacent first electrodes are arranged at intervals in the column direction; Within the same touch unit, the length of the first electrode in the column direction is the same as the length of the region occupied by the at least two second electrodes between two adjacent first electrodes in the column direction.

2. The touch control substrate according to claim 1, wherein Within the same touch unit, the number of second electrodes between every two adjacent first electrodes is equal.

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

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

5. The touch control substrate according to claim 1, characterized in that The first electrode is a driving electrode and the second electrode is a sensing electrode, or the first electrode is a sensing electrode and the second electrode is a driving electrode.

6. A touch display panel, characterized in that, Comprising the touch substrate according to any one of claims 1-5.

7. A touch display device, characterized in that, Comprising the touch display panel according to claim 6.

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