Touch substrate and display device

Abstract

The present application discloses a touch substrate and a display device, wherein a mounting hole is provided on the touch substrate, and the touch substrate further comprises: a first crack detection line and a first electrode, wherein the first crack detection line and the first electrode are connected in the same layer; a second crack detection line and a second electrode, wherein the second crack detection line and the second electrode are connected in the same layer; an insulating isolation layer is provided between the layer where the first crack detection line is located and the layer where the second crack detection line is located, and the first electrode and the second electrode form a mutual inductance capacitor; the projections of the first crack detection line and the second crack detection line on the insulating isolation layer form a detection loop surrounding the mounting hole, and the normal use of the detection function can be effectively ensured through double-layer routing.

Description

Technical Field

[0001] The present application relates to the technical field of touch control substrates, and in particular to a touch control substrate and a display device. Background Art

[0002] FMLOC (Flexible Metal-layer on cell Touch) has become a product design trend. Currently, most full-screen mobile phones are equipped with AA Hole technology, which requires cutting after opening a hole in the AA area (operable area). The opening creates a risk of cracks in the edge area of ​​the hole, so crack detection is required.

[0003] Due to the complexity of routing at the edge of the hole, in related technologies, a single metal layer routing is usually used in the perforated area. However, due to the small gap between the two isolation dams set at the edge of the hole, the single-layer routing is prone to short circuits between the dams, and the crack detection function cannot be realized.

[0004] Therefore, improvements are needed. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the present application is to provide a touch control substrate that effectively ensures the normal use of the detection function through double-layer wiring.

[0006] To achieve the above-mentioned objectives, the first aspect embodiment of the present application proposes a touch substrate, which is provided with a mounting hole, and the touch substrate also includes: a first crack detection line and a first electrode, the first crack detection line and the first electrode are connected in the same layer; a second crack detection line and a second electrode, the second crack detection line and the second electrode are connected in the same layer; an insulating isolation layer is provided between the layer where the first crack detection line is located and the layer where the second crack detection line is located, and the first electrode and the second electrode form a mutual inductance capacitor; the projections of the first crack detection line and the second crack detection line on the insulating isolation layer form a detection loop surrounding the mounting hole.

[0007] According to an embodiment of the present application, the mutual inductance capacitor is disposed between the detection loop and the mounting hole, and at least a portion of the mutual inductance capacitor surrounds the mounting hole.

[0008] According to one embodiment of the present application, the touch substrate further includes an isolation dam surrounding the mounting hole, the isolation dam is disposed on the outside of the detection loop, and the first crack detection line and the second crack detection line extend from the outside of the isolation dam to the inside of the isolation dam.

[0009] According to an embodiment of the present application, in the isolation dam area, the first crack detection line and the second crack detection line are arranged to overlap each other vertically.

[0010] According to one embodiment of the present application, the isolation dam includes a first isolation dam and a second isolation dam, and the first isolation dam and the second isolation dam are trapezoidal structures, wherein the isolation dam close to the mounting hole is higher than the isolation dam far from the mounting hole.

[0011] According to one embodiment of the present application, the projection of the first crack detection line surrounds the mounting hole and / or the projection of the second crack detection line surrounds the mounting hole.

[0012] According to one embodiment of the present application, the first crack detection line and the second crack detection line respectively surround a portion of the mounting hole, and a projection of the first crack detection line and a projection of the second crack detection line partially overlap.

[0013] According to one embodiment of the present application, the first electrode surrounds the mounting hole in a closed manner or surrounds the mounting hole in an open manner.

[0014] According to one embodiment of the present application, the second electrode surrounds the mounting hole in a closed manner or surrounds the mounting hole in an open manner.

[0015] According to the touch control substrate of the embodiment of the present application, an insulating isolation layer is provided between the layer where the first crack detection line is located and the layer where the second crack detection line is located, so that the first crack detection line and the second crack detection line can be isolated by the insulating isolation layer, thereby effectively ensuring that the power supply circuit is not short-circuited.

[0016] In order to achieve the above-mentioned objective, a second aspect of the present application provides a display device, and the display device includes the touch control substrate described in the first aspect of the present application.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a touch control substrate proposed in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of another touch control substrate proposed in an embodiment of the present application;

[0020] Figure 3 For this application Figure 1 Schematic diagram of the cross section at AA';

[0021] Figure 4 For this application Figure 1 Schematic diagram of the cross section at BB';

[0022] Figure 5 For this application Figure 1 Schematic diagram of the cross section at CC';

[0023] Figure 6 A schematic diagram of a power supply circuit principle proposed in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of another touch control substrate proposed in an embodiment of the present application;

[0025] Figure 8 A block diagram of a display device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The touch control substrate and the display device proposed in the present application are described below with reference to the accompanying drawings.

[0028] Figure 1 FIG. 1 is a schematic diagram of the structure of a touch control substrate proposed in an embodiment of the present application. Figure 1-Figure 7 As shown, the touch substrate 1 is provided with a mounting hole 10 , a first crack detection line 101 , a second crack detection line 102 , a first electrode 103 , a second electrode 104 , and an insulating isolation layer 105 .

[0029] In some embodiments, the mounting hole may be a through hole or a blind hole. In some embodiments, there may be at least one mounting hole. When there are more than two mounting holes, the shapes of the mounting holes may be the same or different. The mounting hole may be used to place devices such as a camera and a fingerprint recognition sensor.

[0030] In some embodiments, the first crack detection line 101 and the first electrode 103 are connected in the same layer, the second crack detection line 102 and the second electrode 104 are connected in the same layer, an insulating isolation layer 105 is arranged between the layer where the first crack detection line 101 is located and the layer where the second crack detection line 102 is located, the first electrode 103 and the second electrode 104 form a mutual inductance capacitor, and the projections of the first crack detection line 101 and the second crack detection line 102 on the insulating isolation layer 105 form a detection loop surrounding the mounting hole.

[0031] It should be noted that the first crack detection line 101 and the second crack detection line 102 are metal wires arranged on the touch substrate. Figure 6 As shown, one of the first crack detection line 101 and the second crack detection line 102 is connected to the positive pole of the power supply of the electric device, and the other is connected to the negative pole of the power supply of the electric device. The layer where the first crack detection line 101 is located and the layer where the second crack detection line 102 is located are isolated by an insulating isolation layer to ensure that the positive and negative circuits are not short-circuited. The electric device can be a smart mobile terminal, such as a mobile phone, iPad, or other device with a touch screen, which is not specifically limited here.

[0032] It should also be noted that since a mounting hole is provided on the touch substrate, cracks are easily formed at the edge of the mounting hole after drilling. The cracks will have adverse effects in the subsequent packaging operations and even affect the user's experience of the product. Therefore, crack detection is required near the mounting hole.

[0033] Specifically, the present application sets up a detection loop near the mounting hole by utilizing the first crack detection line 101 and the second crack detection line 102, that is, the combination of the first crack detection line 101 and the second crack detection line 102 can completely cover the four sides of the mounting hole, forming a detection loop surrounding the mounting hole, so that if a crack occurs in the area covered by the detection loop, the first crack detection line 101 and / or the second crack detection line 102 covering it will be broken due to the crack, and a reliable power supply circuit cannot be formed, thereby achieving the purpose of crack detection in the area near the mounting hole.

[0034] It should be understood that the projection of the first crack detection line surrounds the mounting hole and / or the projection of the second crack detection line surrounds the mounting hole. Specifically, only the first crack detection line 101 surrounds the mounting hole (e.g. Figure 1 As shown in FIG. 1 ), only the second crack detection line 102 may surround the mounting hole, the first crack detection line 101 and the second crack detection line 102 may both surround the mounting hole, or the first crack detection line 101 and the second crack detection line 102 may each surround a portion of the mounting hole (as shown in FIG. 1 ). Figure 7 As shown), and the projection formed by the surrounding part of the first crack detection line 101 and the projection formed by the surrounding part of the second crack detection line 102 can be combined to form a detection loop surrounding the mounting hole, wherein the coverage of the first crack detection line 101 and the second crack detection line 102 may partially overlap or may not overlap.

[0035] Combine the following Figure 1 and Figure 3-Figure 5 A specific embodiment of the present application is described. In this embodiment, the detection loop is formed by laying out the first crack detection line 101. Figure 3As shown, the second crack detection line 102 is arranged on the touch substrate, extending from the outer side (left side) of the isolation dam to the inner side (right side) of the isolation dam, the second crack detection line 102 is connected to the second electrode 104 at the AA' section, the insulating isolation layer 105 is arranged above the layer where the second crack detection line 102 is located, the first electrode 103 is arranged above the insulating isolation layer 105 and corresponds to the position of the second electrode 104, and the first crack detection line 101 is connected to the first electrode 103 at point 13. Figure 4 As shown, the first crack detection line 101 extends from the outer side (left side) of the isolation dam to the inner side (right side) of the isolation dam, and a detection loop is arranged around the mounting hole starting from point 14 at the cross section BB'. Figure 5 As shown, at point 15 at the CC' section, the first crack detection line 101 arranged as a detection loop can be seen, that is, the first crack detection line 101 is arranged around the mounting hole 10 starting from point 14, and after circling the mounting hole 10 once, it is connected to the first electrode 103 at point 13.

[0036] Specifically, the electrical equipment may also include an electrical detection unit, wherein the electrical detection unit may include a current detection subunit. When crack detection is performed, the current flows through the first crack detection line 101 to the mutual inductance capacitor formed by the first electrode 103 and the second electrode 104, and then flows into the negative electrode of the power supply through the second crack detection line 102, forming a complete current loop. At this time, if there is no crack in the area covered by the detection loop, the first crack detection line 101 and the second crack detection line 102 are both in a conducting state, and the electrical detection unit can detect the current of the mutual inductance capacitor through the current detection subunit, so as to determine that the area covered by the detection loop has no cracks. If cracks are formed in the area covered by the detection loop, at least one of the first crack detection line 101 or the second crack detection line 102 is broken due to the crack, so that the electrical detection unit cannot detect the current of the mutual inductance capacitor through the current detection subunit, so as to determine that the area covered by the detection loop has cracks.

[0037] Therefore, the touch substrate of the embodiment of the present application sets an insulating isolation layer between the layer where the first crack detection line is located and the layer where the second crack detection line is located, so that the first crack detection line and the second crack detection line can be isolated by the insulating isolation layer, thereby effectively ensuring that the power supply circuit is not short-circuited.

[0038] Furthermore, the touch control substrate 1 further includes an isolation dam surrounding the mounting hole 10 , the isolation dam is arranged outside the detection loop, and the first crack detection line 101 and the second crack detection line 102 extend from the outside of the isolation dam to the inside of the isolation dam.

[0039] It should be noted that the inner side of the detection loop is the mounting hole 10 area, the outer side of the detection loop is the display area of ​​the touch substrate 1, and the isolation dam is arranged on the outer side of the detection loop, that is, the detection loop is arranged between the isolation dam and the mounting hole 10. When the first crack detection line 101 and the second crack detection line 102 are arranged, they start from the outer side of the isolation dam, cross the isolation dam and extend to the inner side of the isolation dam, and then form a detection loop around the mounting hole 10 between the isolation dam and the mounting hole 10.

[0040] The isolation dam is used to isolate the mounting hole area from other areas on the touch substrate 1 , and is specifically used to prevent dust, water vapor, and crack extension.

[0041] It should be understood that in order to ensure that the detection loop can completely surround the installation hole without leaving any gaps, and to reduce the wiring difficulty and reduce the wiring area, the first crack detection line 101 and the second crack detection line 102 can be overlapped in the isolation dam area, such as Figure 2 shown.

[0042] Furthermore, if Figure 3-Figure 5 As shown, the isolation dam includes a first isolation dam 11 and a second isolation dam 12 . The first isolation dam 11 and the second isolation dam 12 are trapezoidal structures, wherein the isolation dam close to the mounting hole 10 is higher than the isolation dam far from the mounting hole 10 .

[0043] For example, if Figure 3 As shown, the first isolation dam 11 is an isolation dam close to the mounting hole 10, and the second isolation dam 12 is an isolation dam far away from the mounting hole 10. The height of the first isolation dam 11 is higher than the height of the second isolation dam 12. Therefore, the first isolation dam 11 and the second isolation dam 12 can form a better isolation effect through the height difference.

[0044] It should be noted that the first isolation dam 11 and the second isolation dam 12 are closely connected, and the width may be only 20 μm, which may easily generate metal residues during the wiring process. Figure 5 As shown, the present application sets an insulating isolation layer between the layer where the first crack detection line 101 is located and the layer where the second crack detection line 102 is located, so that the metal wires remaining between the first isolation dam 11 and the second isolation dam 12 during the wiring process are effectively isolated, and will not cause a short-circuit effect on the entire detection circuit, thereby effectively improving the stability and reliability of crack detection.

[0045] As a feasible embodiment, the mutual inductance capacitor is disposed between the detection loop and the mounting hole 10 , and at least a portion of the mutual inductance capacitor surrounds the mounting hole 10 .

[0046] The first electrode 103 surrounds the mounting hole in a closed manner or in an open manner, and the second electrode 104 surrounds the mounting hole in a closed manner or in an open manner, and the surrounding areas of the first electrode 103 and the second electrode 104 have at least a partial overlap.

[0047] It should be noted that at least one third isolation dam is provided between the mounting hole 10 and the detection loop, and the third isolation dam is used to prevent the crack from extending to the mounting hole. The mutual inductance capacitor formed by the first electrode 103 and the second electrode 104 covers at least one of the at least one third isolation dam. Since the third isolation dam is closer to the mounting hole 10, there is a risk of cracks when no cracks occur in the detection loop. The present application can detect cracks at the third isolation dam by covering the mutual inductance capacitor on the third isolation dam.

[0048] Specifically, the electrical detection unit may further include a capacitance detection subunit, which determines whether a crack occurs in the third isolation dam region and the size of the crack according to a change in the capacitance value of the detected mutual capacitance.

[0049] Optionally, the insulating isolation layer is a TLD film layer.

[0050] To summarize, by providing an insulating isolation layer between the layer where the first crack detection line is located and the layer where the second crack detection line is located, the first crack detection line and the second crack detection line can be isolated by the insulating isolation layer, thereby effectively ensuring that the power supply circuit is not short-circuited.

[0051] To achieve the above objective, the present application further proposes a display device. As shown in the figure, the display device 2 includes the aforementioned touch control substrate 1 .

[0052] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A touch substrate, characterized in that: The touch control substrate is provided with a mounting hole, and the touch control substrate further comprises: A first crack detection line and a first electrode, wherein the first crack detection line and the first electrode are connected in the same layer; a second crack detection line and a second electrode, wherein the second crack detection line and the second electrode are connected in the same layer; An insulating isolation layer is provided between the layer where the first crack detection line is located and the layer where the second crack detection line is located, and the first electrode and the second electrode form a mutual inductance capacitor; Projections of the first crack detection line and the second crack detection line on the insulating isolation layer form a detection loop surrounding the mounting hole; The touch control substrate further includes an isolation dam surrounding the mounting hole, the isolation dam is arranged outside the detection loop, and the first crack detection line and the second crack detection line extend from the outside of the isolation dam to the inside of the isolation dam.

2. The touch substrate according to claim 1, characterized in that: The mutual inductance capacitor is arranged between the detection loop and the mounting hole, and at least a part of the mutual inductance capacitor surrounds the mounting hole.

3. The touch substrate according to claim 1, characterized in that: In the isolation dam area, the first crack detection line and the second crack detection line are arranged to overlap each other vertically.

4. The touch control substrate according to claim 1 or 3, characterized in that: The isolation dam includes a first isolation dam and a second isolation dam, wherein the first isolation dam and the second isolation dam are trapezoidal structures, wherein the isolation dam close to the mounting hole is higher than the isolation dam far from the mounting hole.

5. The touch substrate according to claim 1, characterized in that: The projection of the first crack detection line surrounds the mounting hole and / or the projection of the second crack detection line surrounds the mounting hole.

6. The touch substrate according to claim 1, characterized in that: The first crack detection line and the second crack detection line respectively surround a portion of the mounting hole, and a projection of the first crack detection line and a projection of the second crack detection line partially overlap.

7. The touch substrate according to claim 2, characterized in that: The first electrode surrounds the mounting hole in a closed manner or in an open manner.

8. The touch substrate according to claim 2, characterized in that: The second electrode surrounds the mounting hole in a closed manner or in an open manner.

9. A display device, characterized in that: The display device comprises the touch control substrate as claimed in any one of claims 1 to 8.

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