Touch device

Abstract

The present application provides a touch control device, which includes a touch panel having a touch area. The touch panel includes at least two first-type electrode layers and at least one second-type electrode layer arranged in a stacked manner. The first-type electrode layer includes a first-type touch sensing area, and the orthographic projections of the first-type touch sensing areas included in at least two first-type electrode layers on the touch area are spliced to fill the touch area. The second-type electrode layer includes a second-type touch sensing area, and at least two first-type electrode layers respectively form a mutual capacitance structure with at least one second-type electrode layer; a signal conditioning chip, connected to the touch panel, for receiving the induced capacitance value output by the touch panel and respectively judging the validity of the induced capacitance value based on the set capacitance threshold corresponding to each mutual capacitance structure. In the embodiment of the present application, at least one set capacitance threshold is preset in the signal conditioning chip, thereby improving the recognition degree of the induced signal.

Description

Technical Field

[0001] This application relates to the field of touch technology, and more particularly to a touch device. Background Art

[0002] At present, electronic products are indispensable in people's daily lives, especially electronic products with touch functions. With the increasing demand for electronic products, the touch requirements for touch products are also getting higher and higher.

[0003] In traditional touch devices, the fabricated driving electrodes and sensing electrodes are both single-layer designs, making the upper and lower electrode spacings at each touch node the same. As a result, the capacitance value differences are small, and the recognition of sensing signals is low. Summary of the Invention

[0004] In view of this, embodiments of this application provide a touch device that can improve the recognition of touch signals.

[0005] This application provides a touch device, which includes: a touch panel having a touch area. The touch panel includes at least two first-type electrode layers and at least one second-type electrode layer arranged in a stacked manner. The first-type electrode layer includes a first-type touch sensing area. The first-type touch sensing areas included in the at least two first-type electrode layers are orthogonally projected and spliced on the touch area to fill the touch area. The second-type electrode layer includes a second-type touch sensing area. The at least two first-type electrode layers respectively form at least two mutual capacitance structures with the at least one second-type electrode layer; a signal conditioning chip connected to the touch panel for receiving the induced capacitance values output by the touch panel and respectively judging the effectiveness of the induced capacitance values based on the set capacitance thresholds corresponding to the respective mutual capacitance structures.

[0006] In an embodiment of this application, the set capacitance threshold is related to the electrode spacing between the corresponding mutual capacitance structures, and / or the set capacitance threshold is related to the distance from the upper electrode layer forming the mutual capacitance structure to the surface of the touch device.

[0007] In one embodiment of the present application, at least two set capacitance thresholds include a first set capacitance threshold, a second set capacitance threshold, a third set capacitance threshold and a fourth set capacitance threshold, at least two first-type electrode layers include a first electrode layer and a second electrode layer, at least one second-type electrode layer includes a third electrode layer and a fourth electrode layer, the first electrode layer, the third electrode layer, the second-type electrode layer and the fourth electrode layer are stacked in sequence, and a first mutual capacitance structure formed by the first electrode layer and the third electrode layer corresponds to the first set capacitance threshold; a second mutual capacitance structure formed by the second electrode layer and the third electrode layer corresponds to the second set capacitance threshold; a third mutual capacitance structure formed by the second electrode layer and the fourth electrode layer corresponds to the third set capacitance threshold; and a fourth mutual capacitance structure formed by the first electrode layer and the fourth electrode layer corresponds to the fourth set capacitance threshold.

[0008] In one embodiment of the present application, at least two set capacitance thresholds include a fifth set capacitance threshold and a sixth set capacitance threshold, at least two first-type electrode layers include a fifth electrode layer and a sixth electrode layer, at least one second-type electrode layer includes a seventh electrode layer, the fifth electrode layer, the seventh electrode layer and the sixth electrode layer are stacked in sequence, and the fifth mutual capacitance structure formed by the fifth electrode layer and the seventh electrode layer corresponds to the fifth set capacitance threshold; the sixth mutual capacitance structure formed by the seventh electrode layer and the sixth electrode layer corresponds to the sixth set capacitance threshold.

[0009] In one embodiment of the present application, the first type of touch sensing area includes a plurality of first type electrodes extending along a first direction, the second type of touch sensing area includes a plurality of second type electrodes extending along a second direction, the first type of electrode layer also includes a first peripheral circuit area adjacent to the touch area, wherein the first peripheral circuit area includes a plurality of first signal leads, one end of the plurality of first signal leads is electrically connected to the plurality of first type electrodes, and the other end is distributed on at least one side of the first peripheral circuit area and electrically connected to the signal regulation chip; the second type of electrode layer also includes a second peripheral circuit area adjacent to the touch area, wherein the second peripheral circuit area includes a plurality of second signal leads, one end of the plurality of second signal leads is electrically connected to the plurality of second type electrodes, and the other end is distributed on at least one side of the second peripheral circuit area and electrically connected to the signal regulation chip.

[0010] In one embodiment of the present application, multiple first signal leads are distributed on a first side of the first peripheral circuit area adjacent to the first type of touch sensing area, and a wiring collection portion is provided on the first side, and the other ends of the multiple first signal leads are gathered at at least one wiring collection portion and electrically connected to the signal regulation chip; or, multiple first signal leads are distributed on a first side and a second side of the first peripheral circuit area adjacent to the first type of touch sensing area, and a wiring collection portion is provided on both the first side and the second side, and the other ends of the multiple first signal leads are gathered at the wiring collection portion and electrically connected to the signal regulation chip.

[0011] In one embodiment of the present application, the plurality of first-type electrodes are patterned metal grid electrodes, and the plurality of first-type electrodes included in each of the at least two first-type electrode layers adopt polygonal metal grid patterns that are not completely the same.

[0012] In one embodiment of the present application, multiple second signal leads are distributed on a fourth side of the second peripheral circuit area adjacent to the second type of touch sensing area, and a wiring collection portion is provided on the fourth side, and the other ends of the multiple second signal leads are gathered at at least one wiring collection portion and electrically connected to the signal regulation chip; or, multiple second signal leads are distributed on a first side and a fourth side of the second peripheral circuit area adjacent to the second type of touch sensing area, and a wiring collection portion is provided on both the first side and the fourth side, and the other ends of the multiple second signal leads are gathered at the wiring collection portion and electrically connected to the signal regulation chip.

[0013] In one embodiment of the present application, the plurality of second-type electrodes are patterned metal grid electrodes, and the plurality of second-type electrodes included in each of the at least two second-type electrode layers adopt polygonal metal grid patterns that are not completely the same.

[0014] In one embodiment of the present application, the signal conditioning chip is an independent chip, which is respectively connected to the touch panel and the touch chip of the touch device; or, the signal conditioning chip is integrated into a flexible circuit board, and the flexible circuit board is used to connect the touch panel and the touch chip; or, the signal conditioning chip is integrated into the touch chip.

[0015] The embodiment of the present application provides a touch device, which arranges a type of electrodes in the touch electrodes in different layers so that the distances from the touch capacitor unit to the finger at different positions in the touch area are not completely the same, and the spacing between the two electrode layers constituting the capacitor unit is also not completely the same. At the same time, the set capacitance threshold corresponding to the mutual capacitance structure is pre-stored in the signal conditioning chip. When the finger touches different positions, the generated incompletely identical sensing signals are compared with the set capacitance threshold, so as to assist in identifying the touch position and improve the recognition of the sensing signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic diagram of the structure of a touch control device provided in an embodiment of the present application from a top view perspective.

[0017] Figure 2 FIG. 1 is a schematic diagram showing the structure of the electrode arrangement of a touch device provided in an embodiment of the present application from a top view.

[0018] Figure 3 FIG. 1 is a schematic diagram of a three-dimensional structure of a touch control device provided in an embodiment of the present application.

[0019] Figure 4 FIG. 1 is a schematic diagram of a three-dimensional structure of a touch device provided in another embodiment of the present application.

[0020] Figure 5 The figure shows a schematic structural view of a touch device provided by another embodiment of the present application from a top-down perspective.

[0021] Figure 6 The figure shows a schematic structural view of the electrode arrangement of a touch device provided by another embodiment of the present application from a top-down perspective.

[0022] Figure 7 The figure shows a schematic structural view of a touch device provided by yet another embodiment of the present application from a top-down perspective.

[0023] Figure 8 The figure shows a schematic structural view of a touch device provided by still another embodiment of the present application from a top-down perspective.

[0024] Figure 9 The figure shows a schematic structural view of a patterned metal grid electrode provided by an embodiment of the present application.

[0025] Figure 10 The figure shows a schematic structural view of a patterned metal grid electrode provided by another embodiment of the present application.

[0026] Figure 11 The figure shows a schematic structural view of a patterned metal grid electrode provided by yet another embodiment of the present application. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0028] Figure 1 The figure shows a schematic structural view of a touch device provided by an embodiment of the present application from a top-down perspective. As Figure 1 shown, the touch device provided by the embodiment of the present application has a touch panel with a touch area. The touch panel includes two layers of first-type electrode layers arranged in a stacked manner, such as Figure 1 one layer of the first-type electrode layer 1 (i.e., the first-type electrode layer 1 in (a)) and another layer of the first-type electrode layer 2 (i.e., the first-type electrode layer 2 in (b)). Two layers of second-type electrode layers, such as Figure 1One layer of the second - type electrode layer 3 (i.e., the second - type electrode layer 3 in (c)) and another layer of the first - type electrode layer 4 (i.e., the second - type electrode layer 4 in (d)). The first - type electrode layer 1 (or 2) includes a first - type touch - sensing area. The first - type touch - sensing areas included in the two layers of the first - type electrode layers are orthogonally projected and spliced on the touch area to fill the touch area. The second - type electrode layer 3 (or 4) includes a second - type touch - sensing area. The second - type touch - sensing areas included in the two layers of the second - type electrode layers are also orthogonally projected and spliced on the touch area to fill the touch area. The two layers of the first - type electrode layers and the two layers of the second - type electrode layers form four mutual - capacitance structures. A signal - conditioning chip (not shown), which is connected to the touch panel, is configured to receive the sensed capacitance value output by the touch panel and determine the validity of the sensed capacitance value based on the set capacitance threshold corresponding to each mutual - capacitance structure respectively.

[0029] Specifically, Figure 1 The top - down direction shown is perpendicular to the touch device from top to bottom. It should be noted that the number of layers of the first - type electrode layers and the second - type electrode layers arranged in a stacked manner is not limited to two layers mentioned in the embodiments of the present application, and can also be three layers, four layers or more layers. The embodiments of the present application do not make specific limitations on this.

[0030] Continue to refer to Figure 1 As shown, the two layers of the first - type electrode layers arranged in a stacked manner can be the first - type electrode layer 1 in (a) and the first - type electrode layer 2 in (b) arranged in a stacked manner. In the first - type electrode layer 1, the first - type touch - sensing area can be a touch area formed by a combination of a plurality of first - type electrodes 11 extending along the first direction A, and any two adjacent first - type electrodes 11 are not connected to each other. In the first - type electrode layer 2, the first - type touch - sensing area can also be a touch area formed by a combination of a plurality of first - type electrodes 21 extending along the first direction A, and any two adjacent first - type electrodes 21 are not connected to each other. The first - type touch - sensing area formed by a combination of a plurality of first - type electrodes 11 and the first - type touch - sensing area formed by a combination of a plurality of first - type electrodes 21 can be orthogonally projected and spliced on the touch area to fill the entire touch area. Or rather, the orthogonal projections of the plurality of first - type electrodes 11 and the plurality of first - type electrodes 21 on the touch area have no overlap and exactly fill the entire touch area.

[0031] In the second - type electrode layer 3, the second - type touch - sensing area refers to a touch area formed by a combination of a plurality of second - type electrodes 31 extending along the second direction B, and any two adjacent second - type electrodes 31 are not connected to each other. In the second - type electrode layer 4, the second - type touch - sensing area refers to a touch area formed by a combination of a plurality of second - type electrodes 41 extending along the second direction B, and any two adjacent second - type electrodes 41 are not connected to each other. The second - type touch - sensing area formed by a combination of a plurality of second - type electrodes 31 and the second - type touch - sensing area formed by a combination of a plurality of second - type electrodes 41 can be spliced and completely fill the touch area of the touch panel in the orthographic projection on the touch area.

[0032] The touch area can be the central area of the touch panel (or touch device), and in some embodiments, it can also be equivalent to the display area of the touch screen. This touch area can also be understood as an area formed by a combination of a plurality of first - type touch - sensing areas.

[0033] The following combines Figures 2 to 4 to give an example of the stack of the first - type electrode layer and the second - type electrode layer included in the touch panel in the touch device.

[0034] See Figure 2 , the touch area is completely filled by the first - type electrode layer and the second - type electrode layer. Or rather, a plurality of first - type electrodes 11 and 21 extending along the first direction have no overlap and exactly fill the entire touch area, and at the same time, a plurality of second - type electrodes 31 and 41 extending along the second direction also have no overlap and exactly fill the entire touch area. That is, any area of the touch area corresponds to a mutual - capacitance structure formed by a first - type electrode layer and a second - type electrode layer for signal induction. Since there is a height difference between the electrode layers, the signals induced by each electrode layer are different, so as to improve the signal recognition rate.

[0035] It should be noted that the stack order between the first - type electrode layer and the second - type electrode layer can be diverse. As shown in Figure 1 , for the four - layer electrode layers numbered 1 - 4, the stack order in the vertical direction of the touch device can be 1, 2, 3, and 4. For example, Figure 3 . Among them, one first - type electrode layer 1 is pasted to another first - type electrode layer 2 through the first optical glue layer 34. This first - type electrode layer 2 is pasted to one second - type electrode layer 3 through the second optical glue layer 35. This second - type electrode layer 3 is pasted to another second - type electrode layer 4 through the third optical glue layer 36.

[0036] Also, for example, as shown in Figure 1 , for the four - layer electrode layers numbered 1 - 4, the stack order in the vertical direction of the touch device can also be 1, 3, 4, and 2. For example, Figure 11Among them, a first type of electrode layer 1 of one layer is pasted to a second type of electrode layer 3 of one layer through a first optical adhesive layer 34. The second type of electrode layer 3 is pasted to another second type of electrode layer 4 through a second optical adhesive layer 35. The second type of electrode layer 4 is pasted to another first type of electrode layer 2 through a third optical adhesive layer 36.

[0037] In addition, it should be noted that, as Figure 1 shown, the stacking order of the four electrode layers numbered 1 to 4 in the vertical direction of the touch device can also be 1, 3, 2, and 4, or 3, 2, 1, and 4, etc. The embodiments of the present application do not make specific limitations on the arrangement order of the electrode layers in the vertical direction.

[0038] In an example, the embodiments of the present application paste two layers of double-layer metal mesh electrodes through an optical adhesive layer to form a touch panel. It should be noted that the structure is not limited to the double-layer metal mesh electrodes here. The two layers of double-layer metal mesh electrodes are just one way of combining the four electrode layers.

[0039] For example, continuing to refer to Figure 1 , it can be that the first type of electrode layer 1 in (a) and the second type of electrode layer 3 in (c) form a double-layer metal mesh electrode, and the first type of electrode layer 2 in (b) and the second type of electrode layer 4 in (d) form another double-layer metal mesh electrode, and they are pasted through an optical adhesive layer. Or it can also be that the first type of electrode layer 1 in (a) and the first type of electrode layer 2 in (b) form a double-layer metal mesh electrode, and the second type of electrode layer 3 in (c) and the second type of electrode layer 4 in (d) form another double-layer metal mesh electrode, and they are pasted through an optical adhesive layer. Or the first type of electrode layer 1 in (a) and the second type of electrode layer 4 in (d) form a double-layer metal mesh electrode, and the second type of electrode layer 3 in (c) and the first type of electrode layer 2 in (b) form another double-layer metal mesh electrode, and they are pasted through an optical adhesive layer.

[0040] In an example, a substrate is also included in each of the two layers of double-layer metal mesh electrodes. The first substrate is equivalent to the carrier of the two layers of the first type of electrode layer. The second substrate is equivalent to the carrier of the two layers of the second type of electrode layer. The first substrate and the second substrate can be prepared by processes such as the yellow light process, or can be prepared by sputtering and other methods.

[0041] In an example, an electrode layer of one layer can also be disposed on the surface (such as the lower surface) of the cover plate away from the display screen. The other two electrode layers are respectively disposed on the upper and lower surfaces of the first substrate. The last electrode layer is disposed on the upper surface of the second substrate, and then the cover plate, the first substrate, and the second substrate are pasted through an OCA adhesive.

[0042] In one embodiment, the first type of electrode layer is a driving electrode layer, and the second type of electrode layer is a sensing electrode layer; alternatively, the first type of electrode layer is a sensing electrode layer, and the second type of electrode layer is a driving electrode layer.

[0043] At least two set capacitance thresholds are pre-stored in the signal conditioning chip. It should be noted that the number of set capacitance thresholds can be set according to the number of electrode layers (i.e., the first type of electrode layer and the second type of electrode layer), and the embodiments of the present application do not specifically limit the number of set capacitance thresholds. For example, if the number of electrode layers is four, then the number of set capacitance thresholds is four at this time. Another example is that if the number of electrode layers is three, then the number of set capacitance thresholds is two at this time.

[0044] In one embodiment, the set capacitance threshold is related to the electrode spacing between the corresponding mutual capacitance structures, and / or the set capacitance threshold is related to the distance from the upper electrode layer forming the mutual capacitance structure to the surface of the touch device.

[0045] Specifically, the set capacitance threshold can be determined based on the electrode spacing between the mutual capacitance structures. For example, the larger the electrode spacing, the smaller the corresponding set capacitance threshold; it can also be determined based on the distance from the upper electrode layer forming the mutual capacitance structure to the surface of the touch device. For example, the smaller this distance, the larger the corresponding set capacitance threshold; it can also be determined based on both the electrode spacing of the mutual capacitance structure and the distance from the upper electrode layer to the surface of the touch device, and the embodiments of the present application do not specifically limit this.

[0046] In one embodiment, the set capacitance threshold can be the lowest capacitance threshold within the touch area corresponding to each mutual capacitance structure; the signal conditioning chip determines the validity of the sensed capacitance value output by the touch panel based on the set capacitance threshold corresponding to each mutual capacitance structure.

[0047] Specifically, when the signal conditioning chip receives the sensed capacitance value output by the touch panel, it can first determine the mutual capacitance structure that generates this sensed capacitance value according to the first type of electrode (such as a driving electrode) and the second type of electrode (such as a sensing electrode) that generate this sensed capacitance value, and then call the set capacitance threshold corresponding to this mutual capacitance structure and compare it with this sensed capacitance value. If this sensed capacitance value is greater than this set capacitance threshold, it is determined that this sensed capacitance value is valid, that is, it can be determined that the area where this sensed capacitance value is generated is the area touched by a touch object.

[0048] In one embodiment, the set capacitance threshold can be a range of capacitance value changes; the signal conditioning chip determines the validity of the sensed capacitance value output by the touch panel based on the set capacitance threshold corresponding to each mutual capacitance structure.

[0049] Specifically, when the signal conditioning chip receives the sensed capacitance value output by the touch panel, it compares the sensed capacitance value with the set capacitance thresholds corresponding to each mutual capacitance structure. If the sensed capacitance value falls within a certain set capacitance threshold range, it is determined that the sensed capacitance value is valid, and the touch area corresponding to the set capacitance threshold within which the sensed capacitance value falls can be determined as the area where the touch operation occurs; the touch device can further determine the specific touch coordinates within the touch area according to the driving electrode and the sensing electrode that generate the sensed capacitance value. If the sensed capacitance value does not fall within any of the set capacitance threshold ranges, it is determined that the sensed capacitance value is invalid, that is, no effective touch operation has occurred.

[0050] It should be noted that the set capacitance threshold can also be in other forms, and the embodiments of the present application do not specifically limit the specific form of the set capacitance threshold.

[0051] In one embodiment, the number of layers of the first type of electrode layer is two, and the number of layers of the second type of electrode layer is one, or the number of layers of the first type of electrode layer is one, and the number of layers of the second type of electrode layer is two.

[0052] In one embodiment, the number of layers of the first type of electrode layer is two, and the number of layers of the second type of electrode layer is two.

[0053] It should be understood that Figure 5 is Figure 1 an example of an embodiment Figure 5 with two layers of the first type of electrode layer. For example, Figure 1 one layer of the first type of electrode layer 1 (i.e., the first type of electrode layer 1 in (a)) and another layer of the first type of electrode layer 2 (i.e., the first type of electrode layer 2 in (b)) in Figure 1 and one layer of the second type of electrode layer 3. It should be noted that when the second type of electrode layer has a one-layer structural design, the orthographic projection of the second type of touch sensing area included in the second type of electrode layer in this embodiment can be approximately equivalent to the touch area of the touch panel. The specific content is basically the same as that of Figure 1 the described embodiment. For details, please refer to the description of

[0054] the embodiment, and details will not be repeated here.

[0055] In an embodiment of the present application, at least two set capacitance thresholds include a first set capacitance threshold, a second set capacitance threshold, a third set capacitance threshold, and a fourth set capacitance threshold. At least two first-type electrode layers include a first electrode layer and a second electrode layer. At least one second-type electrode layer includes a third electrode layer and a fourth electrode layer. The first electrode layer, the third electrode layer, the second-type electrode layer, and the fourth electrode layer are stacked in sequence. The first mutual capacitance structure formed by the first electrode layer and the third electrode layer corresponds to the first set capacitance threshold; the second mutual capacitance structure formed by the second electrode layer and the third electrode layer corresponds to the second set capacitance threshold; the third mutual capacitance structure formed by the second electrode layer and the fourth electrode layer corresponds to the third set capacitance threshold; the fourth mutual capacitance structure formed by the first electrode layer and the fourth electrode layer corresponds to the fourth set capacitance threshold.

[0056] Specifically, the touch device includes two stacked first-type electrode layers and two stacked second-type electrode layers. Among them, one of the two first-type electrode layers is the first electrode layer, and the other is the second electrode layer. One of the two second-type electrode layers is the third electrode layer, and the other is the fourth electrode layer.

[0057] In an example, the touch panel in the touch device is stacked in sequence as the first first-type electrode layer (i.e., the first electrode layer), the second second-type electrode layer (i.e., the third electrode layer), the third first-type electrode layer (i.e., the second electrode layer), and the fourth second-type electrode layer (i.e., the fourth electrode layer).

[0058] Among them, the first mutual capacitance structure formed by the first first-type electrode layer and the second second-type electrode layer corresponds to the first set capacitance threshold; the second mutual capacitance structure formed by the second second-type electrode layer and the third first-type electrode layer corresponds to the second set capacitance threshold; the third mutual capacitance structure formed by the first first-type electrode layer and the fourth second-type electrode layer corresponds to the third set capacitance threshold; the fourth mutual capacitance structure formed by the third first-type electrode layer and the fourth second-type electrode layer corresponds to the fourth set capacitance threshold.

[0059] The stacking manner of the four electrode layers can divide the touch area into four mutual capacitance structures. Refer to Figure 2 the shown orientation, which are the first mutual capacitance structure 61, such as the upper left; the second mutual capacitance structure 62, such as the lower left; the third mutual capacitance structure 63, such as the upper right; the fourth mutual capacitance structure 64, such as the lower right (refer to Figure 2(the area divided by the dashed line in the figure). Considering the electrode spacing, for the three mutual capacitance structures of the first mutual capacitance structure 61, the second mutual capacitance structure 62, and the fourth mutual capacitance structure 64, the upper and lower electrodes forming the mutual capacitance are adjacent layers, and the electrode spacing can be considered the same and is also the minimum spacing. However, for the third mutual capacitance structure 63, it forms the first type of electrode layer of the first layer and the second type of electrode layer of the fourth layer, with the largest spacing. Therefore, the capacitance change caused by touch in this area will be significantly smaller than that in the other three areas.

[0060] However, considering the distance from the upper electrode in the mutual capacitance structure to the surface of the touch device, although the capacitance spacings of the three mutual capacitance structures of the first mutual capacitance structure 61, the second mutual capacitance structure 62, and the fourth mutual capacitance structure 64 are the same, the upper electrode of the first mutual capacitance structure 61 is the first type of electrode layer of the first layer, the upper electrode of the second mutual capacitance structure 62 is the second type of electrode layer of the second layer, and the upper electrode of the fourth mutual capacitance structure 64 is the first type of electrode layer of the third layer. Therefore, for the same touch operation, when touching the first mutual capacitance structure 61, the finger is closest to the mutual capacitance, and the capacitance change amount generated should be the largest. When touching the fourth mutual capacitance structure 64, the finger is farthest from the mutual capacitance, and the capacitance change amount generated should be the smallest.

[0061] Therefore, according to the specific stacking method, different thresholds can be set for different areas, so that when detecting, the signal conditioning chip can determine the corresponding area according to the first type of electrode layer and the second type of electrode layer with different stacking methods, and then select an appropriate threshold for judgment.

[0062] Exemplarily, the first set capacitance threshold is greater than the second set capacitance threshold is greater than the fourth set capacitance threshold is greater than the third set capacitance threshold. It should be noted that for the specific judgment of the set capacitance threshold, it can be set according to the actual situation, and the embodiments of the present application do not make specific limitations on this.

[0063] It should also be noted that the stacking order of the four electrode layers can be set according to the actual situation. For example, the second type of electrode layer of the first layer (i.e., the third electrode layer), the first type of electrode layer of the second layer (i.e., the first electrode layer), the second type of electrode layer of the third layer (i.e., the fourth electrode layer), and the first type of electrode layer of the fourth layer (i.e., the second electrode layer). The embodiments of the present application do not limit the specific order of the electrode layer settings. It should be understood that as long as the same type of electrode layer is divided into at least two-layer stacking structures, and different areas correspond to different set capacitance threshold technical solutions, they should all fall within the scope protected by the present application.

[0064] It should also be noted that if a substrate is provided between the electrode layers (the first type of electrode layer or the second type of electrode layer), the corresponding set capacitance threshold should also be adjusted accordingly.

[0065] It can be seen from this that in the embodiment of the present application, by pre-storing a set capacitance threshold corresponding to the mutual capacitance structure in the signal conditioning chip, the mutual capacitance structures with different electrode layer spacings have different set capacitance thresholds. Furthermore, the signal conditioning chip compares the received induced capacitance value with the set capacitance threshold to assist in identifying the touch position and improve the recognition rate of the induction signal.

[0066] In an embodiment of the application, at least two set capacitance thresholds include a fifth set capacitance threshold and a sixth set capacitance threshold, at least two first-type electrode layers include a fifth electrode layer and a sixth electrode layer, and at least one second-type electrode layer includes a seventh electrode layer. The fifth electrode layer, the seventh electrode layer, and the sixth electrode layer are stacked in sequence. The fifth mutual capacitance structure formed by the fifth electrode layer and the seventh electrode layer corresponds to the fifth set capacitance threshold; the sixth mutual capacitance structure formed by the seventh electrode layer and the sixth electrode layer corresponds to the sixth set capacitance threshold.

[0067] Specifically, the touch panel in the touch device includes two stacked first-type electrode layers and one second-type electrode layer, that is, the seventh electrode layer. One of the two first-type electrode layers is the fifth electrode layer, and the other is the sixth electrode layer.

[0068] In an example, the stacking order of the electrode layers in the touch panel can be the first first-type electrode layer (i.e., the fifth electrode layer) in the first layer, the second second-type electrode layer (i.e., the seventh electrode layer) in the second layer, and the third first-type electrode layer (i.e., the sixth electrode layer) in the third layer.

[0069] The stacking manner of the three electrode layers can divide the touch area into two mutual capacitance structures. Refer to Figure 6 the shown orientation, which are the fifth mutual capacitance structure 65, for example, the upper part; the sixth mutual capacitance structure 66, for example, the lower part (refer to Figure 6 the area divided by the dotted line in). Considering the electrode spacing, for the fifth mutual capacitance structure 65 and the sixth mutual capacitance structure 66, the upper and lower electrodes constituting the mutual capacitance structure are adjacent layers, and the electrode spacing can be considered the same.

[0070] However, considering the distance from the upper electrode in the mutual capacitance structure to the surface of the touch device, although the capacitance spacing of the fifth mutual capacitance structure 65 and the sixth mutual capacitance structure 66 is the same, the upper electrode of the fifth mutual capacitance structure 65 is the first first-type electrode layer, and the upper electrode of the sixth mutual capacitance structure 66 is the second second-type electrode layer. Therefore, for the same touch operation, when touching the fifth mutual capacitance structure 65, the finger is closest to the mutual capacitance, and the generated capacitance change amount should be the largest. When touching the sixth mutual capacitance structure 66, the finger is farther from the mutual capacitance, and the generated capacitance change amount is smaller.

[0071] Exemplarily, the fifth set capacitance threshold corresponding to the fifth mutual capacitance structure is greater than the sixth set capacitance threshold corresponding to the sixth mutual capacitance structure.

[0072] It should be noted that during the process of setting the capacitance threshold, it can be set according to the electrode spacing and the distance from the upper electrode in the mutual capacitance structure to the surface of the touch device. That is to say, the first set capacitance threshold can be the same as the fifth set capacitance threshold. The second set capacitance threshold can be the same as the sixth set capacitance threshold.

[0073] It should also be noted that the present application embodiment does not limit the specific stacking structure of the electrode layer, which can be the first layer of the second type of electrode layer, the second layer of the first type of electrode layer, the third layer of the second type of electrode layer, and the present application embodiment does not make specific limitations.

[0074] It can be seen from this that by pre-storing the set capacitance threshold corresponding to the mutual capacitance structure in the signal conditioning chip in the present application embodiment, the mutual capacitance structures with different electrode layer spacings have different set capacitance thresholds. Furthermore, the signal conditioning chip compares the received induced capacitance value with the set capacitance threshold to assist in identifying the touch position and improve the recognition rate of the induction signal.

[0075] In an embodiment of the present application, the first type of touch sensing area includes a plurality of first type of electrodes extending along the first direction. The first type of electrode layer further includes a first peripheral circuit area adjacent to the touch area. Among them, the first peripheral circuit area includes a plurality of first signal leads, one end of the plurality of first signal leads is electrically connected to the plurality of first type of electrodes, and the other end is distributed on at least one side of the first peripheral circuit area and is electrically connected to the signal conditioning chip.

[0076] Specifically, referring to Figure 1 , the first direction A and the second direction B are perpendicular to each other. The first direction A or the second direction B can be the X-axis direction (horizontal) or the Y-axis direction (vertical) of a two-dimensional rectangular coordinate system. That is, when the first direction A is the X-axis direction (horizontal), then the second direction B refers to the Y-axis direction (vertical). When the first direction A is the Y-axis direction (vertical), then the second direction B refers to the X-axis direction (horizontal).

[0077] The first type of touch sensing area includes a plurality of first type of electrodes 11 (or 21) extending along the first direction A. The first type of electrode layer 1 further includes a first peripheral circuit area adjacent to the touch area (that is, the part between the border of the first type of electrode layer 1 and the dashed box in Figure (a)). Among them, the first peripheral circuit area includes a plurality of first signal leads 12 (or 22). One end of the plurality of first signal leads 12 (or 22) is electrically connected to the plurality of first type of electrodes 11 (or 21), and the other end is distributed on at least one side of the first peripheral circuit area and is electrically connected to the signal conditioning chip (not shown).

[0078] The first type of touch sensing area may also include a plurality of first type of electrodes having a certain angle with the first direction A (for example Figure 7 the first type of electrode 11 or the first type of electrode 21 shown). And, the sizes of the first type of touch sensing areas included in each of the two first type of electrode layers may be equal (i.e., the touch area is evenly divided, see Figure 1 ), or may not be equal. In addition, the shape of the first type of touch sensing area may be rectangular (for example Figure 1 ), trapezoidal (for example Figure 2 ), triangular or other polygons. The embodiments of the present application do not make specific limitations on the size, shape and composition form of the first type of touch sensing area.

[0079] The first type of electrode layer further includes a first peripheral circuit area. The first peripheral circuit area is the part between the border of the first type of electrode layer 1 and the dashed box in FIG. (a), and, the first peripheral circuit area is the part between the border of the first type of electrode layer 2 and the dashed box in FIG. (b). The first peripheral circuit area further includes a plurality of first signal leads 12 (or 22), and a plurality of first type of electrodes 11 are respectively electrically connected to the plurality of first signal leads 12. One first type of electrode 11 is electrically connected to one first signal lead 12 (or one first type of electrode 21 is electrically connected to one first signal lead 22), and thus the plurality of first signal leads 12 formed are all gathered in a certain area on at least one side (which may be the upper side, lower side, left side or right side of the touch device) of the first peripheral circuit area to be connected to the signal conditioning chip, so as to connect the first type of electrode 11 to the signal conditioning chip.

[0080] It should be noted that the plurality of first signal leads may also be distributed on three sides or four sides of the first peripheral circuit area, and the embodiments of the present application do not make specific limitations on this. For the details of the arrangement of the first signal leads, please refer to the description of the following embodiments, and in order to avoid repetition, it will not be elaborated here.

[0081] It should also be noted that the plurality of first signal leads 12 may be a plurality of metal leads. The width of the plurality of first signal leads may be 4 μm to 15 μm, and the material may be silver, copper or nano-scale conductive powder (the powder particles are 10 nm to 100 nm), etc. The preparation process of the plurality of first signal leads 12 may adopt any one of screen printing, laser etching, 3D printing, etc.

[0082] It can be seen that the embodiments of the present application divide the first type of electrodes into at least two layers, so that the number of corresponding signal leads for each layer is reduced. At the same time, the plurality of first signal leads are gathered on at least one side of the first peripheral circuit area, reducing the edge width of the entire touch device.

[0083] In an embodiment of the present application, the second type of touch sensing region includes a plurality of second type of electrodes extending in the second direction. The second type of electrode layer further includes a second peripheral circuit region adjacent to the touch region. Among them, the second peripheral circuit region includes a plurality of second signal leads. One end of the plurality of second signal leads is electrically connected to the plurality of second type of electrodes, and the other end is distributed on at least one side of the second peripheral circuit region and is electrically connected to the signal conditioning chip.

[0084] Specifically, referring to Figure 1 , the second type of touch sensing region may include a plurality of second type of electrodes 31 (or 41) parallel to the second direction B, or may include a plurality of second type of electrodes having a certain angle with the second direction B (for example, Figure 7 the second type of electrodes 31 or 41 in Figure 7 ). And the sizes of the second type of touch sensing regions included in the two second type of electrode layers may be equal (i.e., evenly dividing the touch region), or may not be equal. The shape of the second type of touch sensing region may be a rectangle (for example, Figure 7 ), a trapezoid (for example,

[0085] ), a triangle or other polygons. The embodiments of the present application do not specifically limit the size, shape and composition form of the second type of touch sensing region. Figure 1 It should be understood that the number of layers of the first type of electrode layer is the same as that shown in Figure 7 , and it also includes two layers of the first type of electrode layer and two layers of the second type of electrode layer. In Figure 7 , for the two layers of the first type of electrode layer, one layer is the first type of electrode 1 in (a) and the first type of electrode 2 in figure (b). For the two layers of the second type of electrode layer, one layer is the second type of electrode 3 in (c) and the second type of electrode 4 in figure (d). Among them, the first type of electrode layer 1 in (a) includes a first type of touch sensing region composed of a plurality of first type of electrodes 11 having a certain angle with the first direction A, and a plurality of metal leads 12 electrically connected to the plurality of first type of electrodes 11. The first type of electrode layer 2 in (b) also includes a first type of touch sensing region composed of a plurality of first type of electrodes 21 having a certain angle with the first direction A, and a plurality of metal leads 22 electrically connected to the plurality of first type of electrodes 21. The second type of electrode layer 3 in (c) includes a second type of touch sensing region composed of a plurality of second type of electrodes 31 having a certain angle with the second direction B, and a plurality of metal leads 32 electrically connected to the plurality of second type of electrodes 31. The second type of electrode layer 4 in (d) also includes a second type of touch sensing region composed of a plurality of second type of electrodes 41 having a certain angle with the second direction B, and a plurality of metal leads 42 electrically connected to the plurality of second type of electrodes 41. The touch region is based on the splicing of the first type of electrode layer 1 (or 2) and the second type of electrode layer 3 (or 4) and completely fills this region.

[0086] Continuing to refer to Figure 7As shown, the second type of electrode layer further includes a second peripheral circuit region. The second peripheral circuit region is the part between the border of the second type of electrode layer 31 (or 41) and the dashed box in Fig. (c) (or Fig. (d)). The second peripheral circuit region further includes a plurality of second signal leads 32 (or 42), and a plurality of second type of electrodes 31 are electrically connected to the plurality of second signal leads 32 respectively. One second type of electrode 31 is electrically connected to one second signal lead 32 (or one second type of electrode 41 is electrically connected to one second signal lead 42). The plurality of second signal leads 42 formed thereby converge in a certain area on at least one side (which can be the upper side, lower side, left side or right side of the touch device) of the second peripheral circuit region to be connected to the signal conditioning chip, so as to connect the second type of electrode 31 (or 41) to the signal conditioning chip.

[0087] It should be noted that the first signal lead and the second signal lead are only for convenience of distinction. Substantially, they can be the same type or the same kind of signal leads. For the relevant descriptions of the signal leads, please refer to Figure 1 the description of the embodiments. To avoid repetition, it will not be elaborated here.

[0088] It can be seen therefrom that in the embodiments of the present application, the second type of electrodes are arranged in at least two layers, so that the number of corresponding signal leads for each layer is reduced. At the same time, a plurality of second signal leads are converged on at least one side of the second peripheral circuit region, reducing the edge width of the entire touch device.

[0089] In an embodiment of the present application, a plurality of first signal leads are distributed on the first side of the first peripheral circuit region adjacent to the first type of touch sensing region, and a wire gathering portion is provided on the first side. The other ends of the plurality of first signal leads converge on at least one wire gathering portion and are electrically connected to the signal conditioning chip.

[0090] Specifically, referring to Figure 8 , the first type of electrode layer 1 (or 2) includes a first side, a second side, a third side and a fourth side adjacent in sequence, wherein the first side and the third side are opposite, and the second side and the fourth side are opposite. And a plurality of first type of electrodes 11 (or 21) extending from the first side to the third side (i.e., the first direction A) are included in the first type of touch sensing region. For example, the first side can be Figure 8 the left side in the shown orientation.

[0091] Both of the two stacked first type of electrode layers include a first peripheral circuit region (i.e., the part between the border of the first type of electrode layer 1 (or 2) and the dashed box in Fig. (a) or (b)) and a first type of touch sensing region. The first peripheral circuit region includes a plurality of first signal leads 12 (or 22). The plurality of first signal leads 12 (or 22) converge on the first side or the third side of the first peripheral circuit region close to one end of the first type of touch sensing region. A wire gathering portion is provided on the first side (or the third side) of the first peripheral circuit region. For example, the wire gathering portion can be set on the first side asFigure 3 On the left side of the orientation shown.

[0092] The wire gathering part can be the gathering place of multiple signal leads on the first side. One ends of multiple first signal leads are respectively electrically connected to multiple first - type electrodes, and the other ends converge at the wire gathering part and are electrically connected to the signal conditioning chip. In the embodiments of the present application, the specific distribution positions of the multiple first signal leads are not specifically limited and can be flexibly set according to actual situations.

[0093] There can be 1 wire gathering part, located in the middle of the first - type touch - sensing area. For example Figure 8 . There can also be 2 wire gathering parts, or 3, 4, etc. The number of wire gathering parts is not specifically limited in the embodiments of the present application. Multiple wire gathering parts can be distributed on the same side or on multiple sides of the first peripheral circuit area. Multiple wire gathering parts can be respectively located at 1 / 4 and 3 / 4 of the first side, or the leads can be evenly distributed to multiple wire gathering parts.

[0094] Exemplarily, the wire outlet mode of the signal leads of two stacked first - type electrode layers is single - side centralized wire outlet. That is, the signal leads in both electrode layers are led out on the first side or the third side, or can also be led out on the second side or the fourth side. The present application does not make specific limitations on this.

[0095] It can be seen from this that in the embodiments of the present application, the first - type electrodes are arranged in at least two layers, so that the number of corresponding signal leads in each layer is reduced. At the same time, the single - side wire - out method is adopted, which further reduces the side width of the entire touch device compared with the non - layered electrode layer in the prior art.

[0096] In an embodiment of the present application, multiple first signal leads are distributed on the first side and the second side adjacent to the first - type touch - sensing area in the first peripheral circuit area, and wire gathering parts are provided on both the first side and the second side. The other ends of the multiple first signal leads converge at the wire gathering parts and are electrically connected to the signal conditioning chip.

[0097] Specifically, referring to Figure 1 , the first - type electrode layer 1 (or 2) includes a first side, a second side, a third side, and a fourth side that are adjacent in sequence, where the first side and the third side are opposite, and the second side and the fourth side are opposite. And multiple first - type electrodes 11 (or 21) extending from the first side to the third side (i.e., the first direction A) are included in the first - type touch - sensing area. For example, the first side can be Figure 1 On the left side of the orientation shown.

[0098] The two stacked first-type electrode layers each include a first peripheral circuit area (i.e., the portion between the border and the dotted frame of the first-type electrode layer 1 (or 2) in Figure (a) or (b)) and a first-type touch sensing area. The first peripheral circuit area includes a plurality of first signal leads 12 (or 22). The plurality of first signal leads 12 (or 22) are gathered at the first side and the second side of the first peripheral circuit area near one end of the first-type touch sensing area. A line collection portion is provided on the first side and the second side of the first peripheral circuit area. The line collection portion may be the gathering place of the plurality of first signal leads on the first side and the second side, one end of the plurality of first signal leads is electrically connected to the plurality of first-type electrodes respectively, and the other end is gathered at the line collection portion and electrically connected to the signal conditioning chip.

[0099] The arrangement method can be to divide the plurality of first-type electrodes 11 (or 21) into two groups based on the symmetry axis parallel to the A direction in the first-type touch sensing area, one group of the plurality of first-type electrodes 11 collects the plurality of first signal leads 12 connected thereto at the collection part on the second side, and the other group of the plurality of first-type electrodes 11 collects the plurality of first signal leads 12 connected thereto at the collection part on the first side, for example Figure 1 (a) Distribution of leads.

[0100] Alternatively, one group of multiple first-type electrodes 21 collects multiple first signal leads 22 connected thereto at the collection portion on the fourth side, and another group of multiple first-type electrodes 21 collects multiple first signal leads 22 connected thereto at the collection portion on the first side, for example Figure 1 Regarding the lead arrangement in (b), the embodiment of the present application does not limit the specific form of the lead arrangement.

[0101] The hub can have 2 (for example Figure 1 and Figure 7 ), there may be 3, 4, etc. The embodiment of the present application does not specifically limit the number of line collection parts. Multiple line collection parts may be distributed on the same side or on multiple sides of the first peripheral line area. For detailed description, please refer to the description of the above embodiment, and will not be repeated here to avoid repetition.

[0102] It should be noted that the above embodiment uses the axis of symmetry as the basis for grouping multiple first-type electrodes, but the actual division method can be grouped in the form of 1:2 or 1:3, etc., and the embodiment of the present application does not specifically limit this. The first-type electrodes can also be divided into three groups, four groups, etc., and the embodiment of the present application does not specifically limit this.

[0103] It can be seen that the embodiment of the present application arranges the first type of electrodes into at least two layers, so that the number of signal leads corresponding to each layer is reduced. At the same time, the two-side lead-out method is adopted, which further reduces the side width of the entire touch device compared with the single-side lead-out method.

[0104] In an embodiment of the present application, a plurality of first - type electrodes are patterned metal grid electrodes, and the plurality of first - type electrodes included in at least two first - type electrode layers respectively adopt polygon metal grid patterns that are not completely the same.

[0105] Specifically, the material of the metal grid electrode can be at least one of Cu, Ag, Al, Ti, or Ni. The grid pattern of the metal grid layer can be a rectangle, a square, a rhombus, or other polygons. The embodiments of the present application do not make specific limitations on the metal grid electrode and the grid pattern. In addition, it should be noted that although the metal wires in the metal grid are opaque to light, due to the thinness of the metal wires, the human eye cannot visually perceive the metal wires. That is, the metal grid appears transparent to the human vision and does not affect the transparency of the entire touch device.

[0106] In an embodiment, the first - type electrodes included in at least two first - type electrode layers respectively adopt polygon metal grid patterns that are not completely the same.

[0107] The polygon metal grid pattern can be an irregular polygon metal grid pattern. The irregular polygon can be a non - regular polygon, that is, at least one side of the polygon has a length different from the lengths of the other sides. For example Figure 9 ; or at least one side of the polygon can be a curve or a broken line, for example Figure 10 ; or the included angles inside the polygon are different; or at least part of the metal wires in the patterned metal grid electrode are non - straight lines, for example Figure 11 (The dotted lines in the figure represent the arrangement of the metal wires), and the present application does not make specific limitations on the irregular polygon pattern.

[0108] The polygon metal grid patterns that are not completely the same mentioned here can refer to at least one of different included angles, different side lengths, and different degrees of bending of the sides of the polygon. That is to say, as long as the patterns between the first - type electrode layers are different from each other. Even if each layer is an irregular polygon metal grid pattern, the patterns between the layers are also different.

[0109] For example, there are two first - type electrode layers in total. The side length of the polygon metal grid pattern of one first - type electrode layer is different from the side length of the polygon metal grid pattern of the other first - type electrode layer.

[0110] For another example, there are two first - type electrode layers in total. The degree of bending of the sides of the polygon metal grid pattern of one first - type electrode layer is different from the degree of bending of the sides of the polygon metal grid pattern of the other first - type electrode layer.

[0111] In the embodiments of the present application, by using thin metal wires to set at least two first - type electrode layers as patterned metal grid electrodes, the light transmittance of the touch device is increased.

[0112] It can be seen that the embodiment of the present application avoids the generation of interference fringes and increases the signal identifiable features by configuring at least two first-type electrode layers as metal grid electrodes with different patterns.

[0113] In one embodiment of the present application, multiple second signal leads are distributed on the first side and the fourth side of the second peripheral circuit area adjacent to the second type of touch sensing area, and the first side and the fourth side are both provided with a wire collection part, and the other ends of the multiple second signal leads are collected at the wire collection part and electrically connected to the signal regulation chip.

[0114] Specifically, see Figure 1 The second type of electrode layer 3 (or 4) includes a first side, a second side, a third side and a fourth side that are adjacent to each other in sequence, wherein the first side is opposite to the third side, and the second side is opposite to the fourth side. The second type of touch sensing area includes a plurality of second type electrodes 31 (or 41) extending from the second side to the fourth side (i.e., the second direction B). For example, the second side may be Figure 1 Upper side of the orientation shown.

[0115] The two stacked second-type electrode layers both include a second peripheral circuit area (i.e., the portion between the border of the second-type electrode layer 3 (or 4) and the dotted frame in Figure (c) or (d)) and a second-type touch sensing area. The second peripheral circuit area includes a plurality of second signal leads 32 (or 42). The plurality of second signal leads 32 (or 42) are gathered at the first side (or the third side) and the fourth side of the second peripheral circuit area near one end of the second-type touch sensing area. A line collection portion is provided on the first side (or the third side) and the fourth side of the second peripheral circuit area. The line collection portion may be the collection point of the plurality of second signal leads on the first side (or the third side) and the fourth side. One end of the plurality of second signal leads is electrically connected to the plurality of second-type electrodes respectively, and the other end is gathered at the line collection portion and connected to the signal conditioning chip.

[0116] For example, the plurality of second-type electrodes 31 (or 41) are divided into two groups based on the symmetry axis parallel to the B direction in the second-type touch sensing area. One group of the plurality of second-type electrodes 31 collects the plurality of second signal leads 32 connected thereto on the first side, and the other group of the plurality of second-type electrodes 31 collects the plurality of second signal leads 32 connected thereto on the fourth side, and a line collection portion is provided on both the first side and the fourth side, for example Figure 1 (c) The lead arrangement in.

[0117] Alternatively, one group of multiple second type electrodes 41 collects multiple second signal leads 42 connected thereto at the fourth side, and another group of multiple second type electrodes 41 collects multiple second signal leads 42 connected thereto at the third side, and both the third side and the fourth side are provided with a line collection portion, for example Figure 1(d) The arrangement of the leads. The embodiments of the present application do not limit the specific form of the lead arrangement.

[0118] It should be noted that in the above embodiments, the multiple second - type electrodes are grouped based on the axis of symmetry. However, in actuality, the grouping method can be in the form of 1:2 or 1:3, etc. The embodiments of the present application do not specifically limit this. The second - type electrodes can also be divided into three groups, four groups, etc., and the embodiments of the present application do not specifically limit this either.

[0119] It should be understood that for the entire touch panel, this solution requires wire - leading on four sides. The first - type electrodes have a total of four wire - gathering parts, and are distributed on three sides. For example, refer to Figure 1 (a) and (b)'s "second side, fourth side + first side or third side". The second - type electrodes are the same, including four wire - gathering parts and are distributed on three sides. For example, refer to Figure 1 (c) and (d)'s "first side, third side + second side or fourth side".

[0120] It can be seen from this that the embodiments of the present application arrange the first - type electrodes in at least two layers, so that the number of signal leads corresponding to each layer is reduced. At the same time, the entire touch device adopts the wire - leading method on three sides. Compared with the wire - leading method on two sides, the edge width of the entire touch device is further reduced.

[0121] In an embodiment of the present application, multiple second - signal leads are distributed on the fourth side adjacent to the second - type touch - sensing area in the second peripheral circuit area, and a wire - gathering part is provided on the fourth side. The other ends of the multiple second - signal leads converge at at least one wire - gathering part and are electrically connected to the signal - regulating chip.

[0122] Specifically, refer to Figure 8 , the second - type electrode layer 3 (or 4) includes the first side, the second side, the third side, and the fourth side that are adjacent in sequence, where the first side and the third side are opposite, and the second side and the fourth side are opposite. And the multiple second - type electrodes 31 (or 41) extending from the second side to the fourth side (i.e., the second direction B) are included in the second - type touch - sensing area. For example, the fourth side can be Figure 8 the lower side in the shown orientation.

[0123] The two stacked second-type electrode layers both include a second peripheral circuit area (i.e., the portion between the border of the second-type electrode layer 3 (or 4) and the dotted frame in Figure (c) or (d)) and a second-type touch sensing area. The second peripheral circuit area includes a plurality of second signal leads 32 (or 42). The plurality of second signal leads 32 (or 42) converge on the second side or the fourth side of the second peripheral circuit area. A line collection portion is provided on the second side or the fourth side of the second peripheral circuit area. The line collection portion may be the gathering place of the plurality of signal leads on the second side (or the fourth side). One ends of the plurality of second signal leads are electrically connected to the plurality of second-type electrodes, respectively, and the other ends converge at the line collection portion and are electrically connected to the signal conditioning chip. The embodiment of the present application does not specifically limit the specific distribution positions of the plurality of second signal leads 32 (or 42), and can be flexibly arranged according to actual conditions.

[0124] In one example, the signal leads of the two stacked second-type electrode layers are led out in a single-side concentrated manner, that is, the signal leads in the two electrode layers are all led out from the second side or the fourth side.

[0125] It should be understood that for the entire touch device, only two sides are needed to extend the wires. That is, the first type of electrode has only two groups of wire collection parts, for example Figure 8 In (a) and (b), the first signal leads are located in the collection area of the first side and are distributed on the same side. The first type of electrode can only have leads from the first side or the third side. The second type of electrode is also the same, with two sets of collection parts, for example Figure 8 In (c) and (d), the plurality of second signal lead wires are in the collection area of the fourth side and are distributed on the same side. The second type of electrode may only have lead wires extending from the second side or the fourth side.

[0126] It can be seen that the embodiment of the present application arranges the first type of electrodes into at least two layers, so that the number of signal leads corresponding to each layer is reduced. At the same time, the entire touch device adopts a two-side lead-out method, which further reduces the side width of the entire touch device compared to the non-layered electrode layer in the prior art.

[0127] In one embodiment of the present application, the plurality of second-type electrodes are patterned metal grid electrodes, and the plurality of second-type electrodes included in each of the at least two second-type electrode layers adopt polygonal metal grid patterns that are not completely the same.

[0128] Specifically, the metal grid structure of the second type of electrode is substantially the same as the metal grid structure of the first type of electrode. For details, please refer to the description of the above embodiment, which will not be repeated here.

[0129] It can be seen that the embodiment of the present application avoids the generation of interference fringes and increases the signal identifiable features by configuring at least two second-type electrode layers as metal grid electrodes with different patterns.

[0130] In an embodiment of the present application, the signal conditioning chip is an independent chip, which is respectively connected to the touch panel and the touch chip of the touch device; alternatively, the signal conditioning chip is integrated in a flexible circuit board, and the flexible circuit board is used to connect the touch panel and the touch chip; or the signal conditioning chip is integrated in the touch chip.

[0131] Specifically, the signal conditioning chip can be an independent chip, one end of which is electrically connected to the touch panel, and the other end is electrically connected to the touch chip of the touch device. It should be noted that in this embodiment, the signal judgment for setting the capacitance threshold can be completed in this independent chip, without the need to improve the touch chip itself. However, since the signal conditioning chip is an independent structure, it may occupy more space in terms of hardware than the traditional structure.

[0132] The signal conditioning chip can also be integrated in a Flexible Printed Circuit (FPC), that is, one end of the signal conditioning chip is electrically connected to the touch panel, and the other end is electrically connected to the touch chip. The signal conditioning chip can also be integrated in the touch chip. The embodiments of the present application do not specifically limit the form of the signal conditioning chip. It should be noted that in the above two embodiments, they are both integrated in existing components, and only the flexible circuit board or the touch chip needs to be improved. Therefore, since the signal conditioning chip is integrated in the existing components, the occupied space of the touch device remains basically unchanged.

[0133] It can be seen from this that the embodiments of the present application are not limited to the presentation form of the signal conditioning chip, making the setting of the signal conditioning chip more flexible to meet the requirements of different touch devices.

[0134] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined by "first" and "second" may explicitly or implicitly include at least one of such features.

[0135] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A touch device, characterized in that, Comprising: A touch panel, the touch panel having a touch area, the touch panel including at least two first - type electrode layers and at least one second - type electrode layer arranged in a stacked manner. The first - type electrode layer includes a first - type touch - sensing area, and the orthographic projections of the first - type touch - sensing areas included in the at least two first - type electrode layers on the touch area are spliced to fill the touch area. The second - type electrode layer includes a second - type touch - sensing area, and the at least one second - type electrode layer includes one layer of the second - type electrode layer or at least two layers of the second - type electrode layer. When the at least one second - type electrode layer includes one layer of the second - type electrode layer, the orthographic projection of the second - type touch - sensing area included in the one layer of the second - type electrode layer on the touch area fills the touch area. When the at least one second - type electrode layer includes at least two layers of the second - type electrode layer, the orthographic projections of the second - type touch - sensing areas included in the at least two layers of the second - type electrode layers on the touch area are spliced to fill the touch area. The at least two first - type electrode layers and the at least one second - type electrode layer form a mutual - capacitance structure respectively. A signal - regulating chip, connected to the touch panel, for receiving the induced capacitance value output by the touch panel and respectively judging the validity of the induced capacitance value based on the set capacitance thresholds corresponding to each mutual - capacitance structure.

2. The touch control device according to claim 1, wherein The set capacitance threshold is related to the electrode spacing between the corresponding mutual - capacitance structures, and / or the set capacitance threshold is related to the distance from the upper - layer electrode layer forming the mutual - capacitance structure to the surface of the touch device.

3. The touch control device according to claim 1, wherein The set capacitance threshold includes a first set capacitance threshold, a second set capacitance threshold, a third set capacitance threshold, and a fourth set capacitance threshold. The at least two first - type electrode layers include a first electrode layer and a second electrode layer, and the at least one second - type electrode layer includes a third electrode layer and a fourth electrode layer. The first electrode layer, the third electrode layer, the second - type electrode layer, and the fourth electrode layer are arranged in a stacked manner in sequence. The first mutual - capacitance structure formed by the first electrode layer and the third electrode layer corresponds to the first set capacitance threshold. The second mutual - capacitance structure formed by the second electrode layer and the third electrode layer corresponds to the second set capacitance threshold. The third mutual - capacitance structure formed by the second electrode layer and the fourth electrode layer corresponds to the third set capacitance threshold. The fourth mutual - capacitance structure formed by the first electrode layer and the fourth electrode layer corresponds to the fourth set capacitance threshold.

4. The touch control device according to claim 1, wherein The set capacitance threshold includes a fifth set capacitance threshold and a sixth set capacitance threshold. The at least two first - type electrode layers include a fifth electrode layer and a sixth electrode layer, and the at least one second - type electrode layer includes a seventh electrode layer. The fifth electrode layer, the seventh electrode layer, and the sixth electrode layer are arranged in a stacked manner in sequence. The fifth mutual - capacitance structure formed by the fifth electrode layer and the seventh electrode layer corresponds to the fifth set capacitance threshold. The sixth mutual - capacitance structure formed by the seventh electrode layer and the sixth electrode layer corresponds to the sixth set capacitance threshold.

5. The touch control device according to claim 1, wherein The first type of touch sensing area includes a plurality of first type electrodes extending along a first direction, and the second type of touch sensing area includes a plurality of second type electrodes extending along a second direction. The first type of electrode layer further includes a first peripheral circuit area adjacent to the touch area, wherein the first peripheral circuit area includes a plurality of first signal leads, one end of the plurality of first signal leads is electrically connected to the plurality of first type electrodes, and the other end is distributed on at least one side of the first peripheral circuit area and electrically connected to the signal conditioning chip; The second type of electrode layer also includes a second peripheral circuit area adjacent to the touch area, wherein the second peripheral circuit area includes a plurality of second signal leads, one end of the plurality of second signal leads is electrically connected to the plurality of second type electrodes, and the other end is distributed on at least one side of the second peripheral circuit area and electrically connected to the signal regulation chip.

6. The touch control device according to claim 5, wherein, The plurality of first signal leads are distributed on a first side of the first peripheral circuit area adjacent to the first type of touch sensing area, and a line collection portion is provided on the first side, and the other ends of the plurality of first signal leads are collected at the line collection portion and electrically connected to the signal conditioning chip; or, The plurality of first signal leads are distributed on a first side and a second side of the first peripheral circuit area adjacent to the first type of touch sensing area, and both the first side and the second side are provided with a line collection portion, and the other ends of the plurality of first signal leads are collected at the line collection portion and electrically connected to the signal regulation chip.

7. The touch control device according to claim 6, wherein, The plurality of first-type electrodes are patterned metal grid electrodes, and the plurality of first-type electrodes included in each of the at least two first-type electrode layers adopt polygonal metal grid patterns that are not completely the same.

8. The touch control device according to claim 5, wherein, The plurality of second signal leads are distributed on a fourth side of the second peripheral circuit area adjacent to the second type touch sensing area, and a line collection portion is provided on the fourth side, and the other ends of the plurality of second signal leads are collected at the line collection portion and electrically connected to the signal conditioning chip; or, The plurality of second signal leads are distributed on a first side and a fourth side of the second peripheral circuit area adjacent to the second type touch sensing area, and both the first side and the fourth side are provided with a line collection portion, and the other ends of the plurality of second signal leads are collected at the line collection portion and electrically connected to the signal regulation chip.

9. The touch control device according to claim 5, wherein, The plurality of second-type electrodes are patterned metal grid electrodes, and the plurality of second-type electrodes included in each of the second-type electrode layers adopt polygonal metal grid patterns that are not completely the same.

10. The touch control device according to claim 1, wherein, The signal conditioning chip is an independent chip, connected to the touch panel and the touch chip of the touch device respectively; or, The signal conditioning chip is integrated into a flexible circuit board, and the flexible circuit board is used to connect the touch panel and the touch chip; or, The signal conditioning chip is integrated into the touch control chip.

Images