CN111813264A - Touch substrate and display device - Google Patents

Abstract

A touch substrate and a display device are provided. The touch substrate includes a base and a plurality of first touch units and a plurality of second touch units arranged in an array on the base. The first touch The unit is connected with a first signal line, the second touch unit is connected with a second signal line, the substrate is provided with an opening passing through the first touch unit and/or the second touch unit, The first touch unit penetrated by the opening is connected with a third signal line, and the third signal line and the first signal line form dual signal channels of the first touch unit penetrated by the opening; And/or the second touch unit penetrated by the opening is connected with a fourth signal line, and the fourth signal line and the second signal line form a double touch unit of the second touch unit penetrated by the opening. Signal channel; to ensure the touch performance around the opening.

Description

Touch substrate and display device

technical field

The present invention relates to the technical field of touch control, and in particular, to a touch control substrate and a display device.

Background technique

Organic Light Emitting Diode (Organ Integrated Circuit Light Emitting Diode, OLED) is an active light emitting display device, which has the advantages of self-luminescence, wide viewing angle, high contrast ratio, low power consumption, wide color gamut, lightness and thinness, and can be shaped. With the continuous development of display technology, OLED technology is increasingly used in flexible displays and transparent displays. Transparent display is an important branch of display technology, which refers to the display of images in a transparent state. The viewer can not only see the image in the display device, but also see the scene behind the display device, which can realize virtual reality/augmented reality ( Virtual Reality/Augmented Reality, VR/AR) and 3D display capabilities.

At present, touch substrates are used in display devices. Depending on the combination of the touch substrate and the display screen in the display device, the touch screen generally includes: an out-cell touch screen (for example, the touch substrate is attached to the display screen) ), the touch sensor is on-cell (that is, the touch substrate is formed on the display screen), and the touch sensor is in-cell (that is, the touch substrate is formed on the display substrate of the display panel).

With the continuous pursuit of full-screen mobile phones by customers, the touch area of OLED mobile phones is required to be larger and larger, and the borders are getting narrower. There is a small concave hole above the screen to place the camera module, and then a new full-screen solution is proposed: opening a hole in the display area (AAHole screen).

For the AA Hole screen solution, the touch substrate has the problem of poor touch performance around the opening. The current solution 1: The touch bridge point is designed to avoid the opening position, and the integrated circuit is used to optimize the algorithm processing to realize the touch function of the surrounding position of the opening. This solution requires higher performance of the integrated circuit and increases the power consumption. At the same time, due to the avoidance of the touch bridge point design, the area of the touch unit adjacent to the opening is small, and the channel impedance increases, which seriously affects the transmission of the channel signal. Solution 2: The touch bridge point is not designed for avoidance, and the bridge point part dug out by the opening is connected to the channel through a special bridge structure design. This solution basically sacrifices the touch function near the opening position, and the special frame The bridge structure also has the risk of electrostatic discharge (ESD), and also has the problem that the channel impedance increases, which affects the channel signal transmission.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present invention is to provide a touch substrate and a display device to ensure the touch performance around the opening.

In order to solve the above technical problems, an embodiment of the present invention provides a touch substrate, including a base and a plurality of first touch units and a plurality of second touch units arranged on the base and arranged in an array. A touch unit is connected with a first signal line, the second touch unit is connected with a second signal line, and the substrate is provided with a hole extending through the first touch unit and/or the second touch unit an opening, the first touch unit penetrated by the opening is connected with a third signal line, and the third signal line and the first signal line form a double layer of the first touch unit penetrated by the opening a signal channel; and/or the second touch unit penetrated by the opening is connected with a fourth signal line, and the fourth signal line and the second signal line form a second touch control penetrated by the opening unit's dual signal channels.

In some possible implementations, the opening penetrates the first touch unit and the second touch unit, and the first touch unit penetrated by the opening is connected to a third signal line, which is connected to the first touch unit. A fourth signal line is connected to the second touch unit penetrating through the opening, and the third signal line and the fourth signal line are separated by a first protection line.

In some possible implementations, a ground line is provided on the substrate, and the ground line is respectively connected to the first signal line, the second signal line, the third signal line, and the fourth signal line They are separated by a second protection line.

In some possible implementations, the first touch units are arranged in a row on the substrate, the second touch units are arranged in a row on the substrate, and adjacent to the first touch units in the same column The touch units are connected through bridges.

In some possible implementations, the openings respectively penetrate the bridges, the first touch units located in the same column and the second touch units located in the same row, and the openings penetrated through the openings are located in the same row. The first touch units in the same column are respectively connected with the third signal lines, and the second touch units in the same row are respectively connected with the fourth signal lines.

In some possible implementations, an insulating layer is provided on the first touch unit, the bridge is provided on the insulating layer, and a connection with the first touch unit is provided in the insulating layer. via holes, the bridges are respectively connected with the adjacent first touch units located in the same column through the via holes.

In some possible implementations, the first touch units are arranged in a row on the substrate, the second touch units are arranged in a row on the substrate, and the first touch units located in the same column The control unit is connected to the same first signal line, and the second touch control units located in the same row are connected to the same second signal line.

In some possible implementations, the opening is a circular through hole, the diameter of the opening is 3.5mm-4.5mm, the first touch unit and the second touch unit are both diamond-shaped, The length of the diagonal of the first touch unit and the second touch unit is 3.8mm-4.3mm.

In some possible implementations, an integrated circuit is further included, and the first touch control unit penetrated by the opening is connected to the integrated circuit through a dual signal channel formed by the third signal line and the first signal line and/or the second touch unit penetrated by the opening is connected to the integrated circuit through a dual signal channel formed by the fourth signal line and the second signal line.

An embodiment of the present invention further provides a display device including the aforementioned touch substrate.

Embodiments of the present invention provide a touch substrate and a display device. A first touch unit and a second touch unit penetrated by openings are respectively connected with a third signal line and a first signal line, and a fourth signal line and a first touch unit. The dual signal channels formed by the two signal lines enable the integrated circuit to scan and receive synchronously at the near and far ends of the opening, ensuring the touch function around the opening. The dual signal channels are connected to the integrated circuit and pass through the internal The algorithm processing can achieve better touch function around the opening, reduce the power consumption of the integrated circuit, and at the same time reduce the process difficulty of the touch substrate fabrication, which can effectively improve the yield and reduce the cost to ensure the touch performance around the opening.

Of course, it is not necessary for any product or method of the present invention to achieve all of the advantages described above at the same time. Other features and advantages of the present invention will be set forth in the description examples which follow, and, in part, will be apparent from the description examples, or may be learned by practice of the invention. The objectives and other advantages of the embodiments of the invention may be realized and attained by the structure particularly pointed out in the description, claims and drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. They are used to explain the technical solutions of the present invention together with the embodiments of the present application, and do not limit the technical solutions of the present invention. The shapes and sizes of the components in the drawings do not reflect the actual scale, and are only intended to illustrate the content of the present invention.

FIG. 1 is a schematic structural diagram 1 of a touch substrate according to an embodiment of the present invention;

Fig. 2 is an enlarged view at a place in Fig. 1;

3 is a schematic structural diagram of a first touch unit and a second touch unit in a touch substrate according to an embodiment of the present invention;

Figure 4 is a sectional view at A-A in Figure 1;

Figure 5 is a sectional view at B-B in Figure 1;

FIG. 6 is an enlarged view 1 of the opening in the touch substrate according to the embodiment of the present invention;

FIG. 7 is an enlarged view 2 of the opening in the touch substrate according to the embodiment of the present invention;

FIG. 8 is an enlarged view 3 of the opening in the touch substrate according to the embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention. It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.

An embodiment of the present invention provides a touch substrate, including a base, a plurality of first touch units and a plurality of second touch units arranged on the base and arranged in an array, the first touch units are connected with a first signal line, the second touch unit is connected to a second signal line, the substrate is provided with an opening penetrating the first touch unit and/or the second touch unit, The first touch unit penetrated by the opening is connected with a third signal line, and the third signal line and the first signal line form a dual signal channel of the first touch unit penetrated by the opening; and/or The second touch unit penetrated by the opening is connected with a fourth signal line, and the fourth signal line and the second signal line form dual signal channels of the second touch unit penetrated by the opening. Through the dual signal channels formed by the third signal line and the first signal line and the fourth signal line and the second signal line, the touch performance around the opening is ensured.

FIG. 1 is a schematic structural diagram 1 of a touch substrate according to an embodiment of the present invention; FIG. 2 is an enlarged view of a position in FIG. 1 . As shown in FIG. 1 and FIG. 2 , the planar structure of the touch substrate includes a substrate 1 and a plurality of first touch units 2 and a plurality of second touch units 3 arranged in an array on the substrate 1 , and the first touch The control unit 2 and the second touch unit 3 are insulated from each other. A plurality of first touch units 2 are arranged in a row on the substrate 1, a plurality of second touch units 3 are arranged in a row on the substrate 1, and a bridge 4 is used between adjacent first touch units 2 located in the same column. Connected. The first touch units 2 located in the same column are connected to the same first signal line 5 , and the second touch units 3 located in the same row are connected to the same second signal line 6 . The first touch unit 2 and the second touch unit 3 are disposed on the same layer to form a self-capacitive integrated structure. A coupling capacitance region is formed between the first touch unit 2 and the second touch unit 3 . When a touch occurs, the capacitance of the coupling capacitance region between the first touch unit 2 and the second touch unit 3 changes, so that the sensing signal changes accordingly, and the touch position is determined.

3 is a schematic structural diagram of a first touch unit and a second touch unit in a touch substrate according to an embodiment of the present invention. One of the first touch unit 2 and the second touch unit 3 in the touch substrate of the embodiment of the present invention is a Tx (driving) electrode and the other is an Rx (sensing) electrode, so that the two cooperate to complete the touch response. In specific implementation, the first touch unit 2 may be the Tx electrode, the second touch unit 2 may be the Rx electrode, or the second touch unit 2 may be the Tx electrode, and the first touch unit 2 may be the Rx electrode. As shown in FIG. 3 , in the touch substrate of the embodiment of the present invention, the first touch unit 2 is a Tx electrode, and the second touch unit 3 is an Rx electrode. The adjacent first touch units 2 in the same column are connected through bridges 4 , and the adjacent second touch units 3 in the same row are connected through bridges 4 . When the first touch unit 2 and the second touch unit 3 in the touch substrate of the embodiment of the present invention are in mutual capacitance mode, what is detected is the change of the mutual capacitance value of the Tx and Rx channels, including: the fringe capacitance CM1 of the Tx and Rx sensing units , CM2, CM3, CM4, and the coupling capacitor CM0 (not marked in the figure) at the intersection of the Tx and Rx sensing units (ie, the position of the bridge 4). When a finger touches, the mutual capacitance value usually becomes smaller, and the integrated circuit detects the touch position according to the change of the mutual capacitance value and feeds it back to the Host terminal.

FIG. 4 is a cross-sectional view at A-A in FIG. 1 . As shown in FIG. 4 , a plurality of retaining walls 10 are arranged around the opening 7 in the touch substrate at intervals around the opening 7 . The retaining walls 10 include: a touch unit material layer 101 disposed on the substrate 1 and a A first insulating layer 11 and a second insulating layer 12 are provided on the metal layer 102 on the touch unit material layer 101 and the retaining wall 10 .

FIG. 5 is a cross-sectional view at B-B in FIG. 1 . As shown in FIG. 5 , the vertical structure at the bridge 4 between adjacent first touch units 2 in the touch substrate includes a substrate 1 , a first touch unit 2 formed on the substrate 1 , and a first touch unit 2 formed on the first touch unit 2 . The first insulating layer 11 on the cell 2 , the bridge 4 formed on the first insulating layer 11 , and the second insulating layer 12 formed on the bridge 4 . The first insulating layer 11 is provided with via holes respectively communicating with the adjacent first touch units 2 in the same column, and the bridges 4 are respectively connected with the adjacent first touch units 2 in the same column through the via holes.

As shown in FIG. 1 and FIG. 2 , the substrate 1 is provided with openings 7 penetrating the first touch unit 2 and the second touch unit 3 . The first touch unit 2 penetrated by the opening 7 is connected to a third signal line 8 , and the third signal line 8 and the first signal line 5 are respectively connected to the first touch unit 2 penetrated by the opening 7 to form an open The dual signal channels of the first touch unit 2 penetrated by the hole 7; the second touch unit 3 penetrated by the opening 7 is connected to a fourth signal line 9, and the fourth signal line 9 and the second signal line 6 are respectively connected to the opened The second touch units 3 penetrated by the holes 7 are connected to form dual signal channels of the second touch units 3 penetrated by the holes 7 . Wherein, the first touch unit 2 penetrated by the opening 7 means that the opening 7 penetrates the part of the first touch unit 2 , so that the penetrated part of the first touch unit 2 is missing. The second touch unit 3 penetrated by the opening 7 means that the opening 7 penetrates a part of the second touch unit 3 , so that the penetrated part of the second touch unit 3 is missing.

In some embodiments, the opening may only penetrate the first touch unit, and the first touch unit penetrated by the opening is connected to the third signal line; or the opening may only penetrate the second touch unit, and is A fourth signal line is connected to the second touch unit penetrating through the hole. This embodiment will not be repeated here.

In the embodiment of the present invention, the first touch unit and the second touch unit penetrated by the opening are respectively connected with dual signal channels formed by the third signal line and the first signal line, and the fourth signal line and the second signal line, so that the The integrated circuit can scan and receive the near-end and the far-end synchronously for the opening position to ensure the touch function around the opening. The dual signal channels are connected to the integrated circuit. Through the internal algorithm processing of the integrated circuit, a better opening can be realized. The peripheral touch function reduces the power consumption of the integrated circuit, and at the same time reduces the technological difficulty of manufacturing the touch substrate, which can effectively improve the yield and reduce the cost to ensure the touch performance around the opening.

As shown in FIG. 1 and FIG. 2 , the substrate 1 is provided with an opening 7 penetrating the first touch unit 2 and the second touch unit 3 . The opening 7 penetrates two adjacent first touch units 2 in the same row and two adjacent second touch units 3 in the same column. When the opening 7 is located in the non-bridge 4 area, the two adjacent first touch units 2 in the same row are connected to the two third signal lines 8 respectively, and the two adjacent second touch units 3 in the same column are connected to the two third signal lines 8 respectively. The two fourth signal lines 9 are connected. The position occupied by the opening 7 does not affect the integrity of the connection between the four nodes A, B, C, and D. The first touch unit 2 and the second touch unit 3 around the opening 7 pass through the four nodes are connected. The two adjacent first touch units 2 in the same row are connected to the integrated circuit through the dual signal channel formed by the first signal line 5 and the third signal line 8, and the two adjacent second touch units 3 in the same column are connected to the integrated circuit through the first signal line 5 and the third signal line 8. The dual signal channels formed by the two signal lines 6 and the fourth signal line 9 are connected to the integrated circuit. When the integrated circuit charges the first touch unit 2 or the second touch unit 3, and the signal of the integrated circuit is transmitted to the A and B nodes through the C and D nodes, the existence of the opening 7 causes the first touch unit 2 and the The area of the second touch control unit 3 is reduced, and the signal is continuously attenuated due to the increase in the impedance of the opening 7 . The four nodes A, B, C, and D are directly connected to the integrated circuit through dual signal channels. Because the impedance of the signal line is small, the self-mutual capacitance of the four nodes is guaranteed, and the capacitance is not affected by the opening 7. It cannot be fully filled, thereby ensuring the touch performance of the positions around the opening 7 . Usually the opening 7 is a circular through hole, and the diameter of the opening 7 is 3.5mm-4.5mm. The first touch unit 2 and the second touch unit 3 are both diamond-shaped, and the length of the diagonal of the first touch unit 2 and the second touch unit 3 is 3.8 mm-4.3 mm. The sizes of the first touch unit 2 , the second touch unit 3 and the opening 7 match. When the opening 7 is located in the non-bridge 4 area, usually only four touch units are affected, that is, two adjacent first touch units 2 and two adjacent second touch units 3, and only one first touch unit is required. The signal line, a second signal line, a third signal line and a fourth signal line can form a dual signal channel.

In some possible implementations, the third signal line and the fourth signal line are separated by a first protection line to avoid signal interference.

In some possible implementations, a ground wire is provided on the substrate, and the ground wire is separated from the first signal wire, the second signal wire, the third signal wire and the fourth signal wire by a second protection wire, so as to avoid signal interference.

In some possible implementations, the first signal line and the second signal line are separated by a third protection line to avoid signal interference.

FIG. 6 is an enlarged view 1 of the opening in the touch substrate according to the embodiment of the present invention. As shown in FIG. 6 , the substrate 1 is provided with an opening 7 penetrating the first touch unit 2 and the second touch unit 3 . The adjacent first touch units 2 in the same column are connected through bridges 4 . When the opening 7 is located in the area of the bridge 4 , the opening 7 penetrates through the two adjacent first touch units 2 in the same column, the two adjacent second touch units 3 in the same row, and the bridge 4 . Two adjacent first touch units 2 in the same column are connected to the same third signal line 8 , and two adjacent second touch units 3 in the same row are connected to the same fourth signal line 9 . The two adjacent first touch units 2 in the same column are connected to the integrated circuit through the dual signal channel formed by the first signal line and the third signal line 8 , and the two adjacent second touch units 3 in the same row are connected to the integrated circuit through the second The dual signal channel formed by the signal line and the fourth signal line 9 is connected to the integrated circuit.

FIG. 7 is an enlarged view 2 of the opening in the touch substrate according to the embodiment of the present invention. As shown in FIG. 7 , the substrate 1 has two openings 7 penetrating through the first touch unit 2 and the second touch unit 3 . When the openings 7 are located in the non-bridge 4 area, the two openings 7 pass through the three adjacent first touch units 2 in the same row, the two openings 7 pass through two adjacent columns, and each column is adjacent to two second touch units 2 . The touch unit 3 , the adjacent three first touch units 2 in the same row are respectively connected with the three third signal lines 8 , and the adjacent two adjacent columns and the adjacent two second touch units 3 in each column are respectively connected with two third signal lines 8 . The fourth signal line 9 is connected.

FIG. 8 is an enlarged view 3 of the opening in the touch substrate according to the embodiment of the present invention. As shown in FIG. 8 , the substrate 1 is provided with two openings 7 penetrating through the first touch unit 2 and the second touch unit 3 . When the openings 7 are located in the area of the bridge 4, the openings 7 penetrate through two adjacent columns, two adjacent first touch units 2 in each column, through three adjacent second touch units 3 in the same row, and two adjacent ones. The adjacent two first touch units 2 in each column are respectively connected with two third signal lines 8 , and the adjacent three second touch units 3 in the same row are connected with one fourth signal line 9 .

In some possible implementations, the touch control substrate according to the embodiment of the present invention further includes an integrated circuit, and the first touch control unit penetrated by the opening is connected to the integrated circuit through a dual signal channel formed by the third signal line and the first signal line; And/or the second touch unit penetrated by the opening is connected to the integrated circuit through a dual signal channel formed by the fourth signal line and the second signal line.

Embodiments of the present invention further provide a display device, including the touch substrate of the foregoing embodiments. The display device can be any product or component with display function, such as mobile phone, tablet computer, TV, monitor, notebook computer, digital photo frame, navigator, etc., or it can be a product or component with VR, AR and 3D display function.

In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom" "The orientation or positional relationship indicated by "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operates in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited. For example, it may be a fixed connection or a Removable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Although the embodiments disclosed in the present invention are as above, the described contents are only the embodiments adopted to facilitate the understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art to which the present invention belongs, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form and details of the implementation, but within the scope of patent protection of the present invention, still The scope as defined by the appended claims shall prevail.

Claims (10)

1. A touch substrate, comprising a base, a plurality of first touch units and a plurality of second touch units arranged in an array on the base, wherein the first touch units are connected with a first signal line, the second touch unit is connected to a second signal line, the substrate is provided with an opening penetrating the first touch unit and/or the second touch unit, The first touch unit penetrated by the opening is connected with a third signal line, and the third signal line and the first signal line form a dual signal channel of the first touch unit penetrated by the opening; and/or The second touch unit penetrated by the opening is connected with a fourth signal line, and the fourth signal line and the second signal line form dual signal channels of the second touch unit penetrated by the opening. 2 . The touch substrate according to claim 1 , wherein the opening penetrates the first touch unit and the second touch unit, and the first touch is penetrated by the opening. 3 . The unit is connected with a third signal line, the second touch unit penetrated by the opening is connected with a fourth signal line, and the third signal line and the fourth signal line are separated by a first protection line. 3 . The touch substrate of claim 1 , wherein a ground wire is disposed on the base, and the ground wire is connected to the first signal line, the second signal line, the third signal line, and the third signal line respectively. 4 . The signal line and the fourth signal line are separated by a second protection line. 4 . The touch substrate of claim 1 , wherein the first touch units are arranged in a row on the substrate, and the second touch units are arranged in a row on the substrate, 5 . The adjacent first touch units located in the same column are connected through bridges. 5 . The touch substrate of claim 4 , wherein the openings respectively penetrate the bridges, the first touch units located in the same column and the second touch units located in the same row. 6 . , the first touch control units located in the same column penetrated by the openings are respectively connected to the third signal lines, and the second touch control units located in the same row are respectively connected to the fourth signal lines. 6 . The touch substrate according to claim 4 , wherein an insulating layer is provided on the first touch unit, the bridge is provided on the insulating layer element, and the insulating layer is provided with The via holes communicated with the first touch units, and the bridges are respectively connected with the adjacent first touch units located in the same column through the via holes. 7 . The touch substrate of claim 1 , wherein the first touch units are arranged in a row on the substrate, and the second touch units are arranged in a row on the substrate, 8 . The first touch units located in the same column are connected to the same first signal line, and the second touch units located in the same row are connected to the same second signal line. 8 . The touch substrate according to claim 1 , wherein the opening is a circular through hole, the diameter of the opening is 3.5mm-4.5mm, the first touch unit and the The second touch units are all diamond-shaped, and the diagonal lengths of the first touch unit and the second touch unit are 3.8mm-4.3mm. 9 . The touch substrate according to claim 1 , further comprising an integrated circuit, and the first touch unit penetrated by the opening is formed by the third signal line and the first signal line. 10 . The dual signal channels are connected to the integrated circuit; and/or the second touch unit penetrated by the opening is connected to the integrated circuit through dual signal channels formed by the fourth signal line and the second signal line . 10. A display device, comprising the touch substrate according to any one of claims 1-9.

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