Touch panel and display device

Abstract

The embodiments of the present application provide a touch panel and a display device. The touch panel includes a substrate and a display function layer and a touch pattern sequentially formed on the substrate, and the touch pattern transmits touch signals to a control chip through multiple channels. At least a portion of at least one of the channels is arranged on a side of the display function layer away from the touch pattern, and a shielding layer is arranged between the display function layer and the channel. By arranging the channel on a side of the display function layer away from the touch pattern, and using the shielding layer between the channel and the display function layer for signal shielding, the channel can be arranged in both the non-display area and the display area, so that the wiring area of ​​the channel is not restricted.

Description

Technical Field

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

[0002] With the development of display technology, Flexible Multiple Layer on Cell (FMLOC) technology is gradually being applied in OLED display devices. FMLOC integrates the display structure and touch structure together, which can meet the development trend of display technology to be thin, foldable and with narrow bezel.

[0003] The touch structure includes a touch pattern and a channel (Trace). The touch pattern is used to generate a touch signal in response to the user's touch, and the channel connects the touch pattern to the IC chip (Integrated Circuit Chip) to transmit the touch signal. The usual design of the flexible multi-layer structure on the unit is to design the channel in the non-display area (Border area), and in order to ensure the integrity of the channel pattern, the channel needs to be designed within the barrier dam (Dam), which greatly limits the space for channel wiring.

[0004] With the development of full-screen displays, the non-display area is getting smaller and smaller, and channel wiring has become a major problem. Summary of the invention

[0005] The present application provides a touch panel and a display device to solve the problem that the non-display area is getting smaller and smaller and channels are difficult to route.

[0006] According to a first aspect of an embodiment of the present application, a touch panel is provided, the touch panel comprising a substrate and a display function layer and a touch pattern sequentially formed on the substrate, the touch pattern transmitting a touch signal to a control chip through a plurality of channels;

[0007] At least a portion of at least one of the channels is disposed on a side of the display function layer away from the touch pattern, and a shielding layer is disposed between the display function layer and the channel.

[0008] In one embodiment, at least one of the channels includes a first portion and a second portion, the first portion is disposed in the same layer as the touch pattern, the second portion is disposed on a side of the display function layer away from the touch pattern, and the first portion and the second portion are connected via a contact hole;

[0009] One end of the first part is connected to the touch pattern, and the other end of the first part is connected to the contact hole; one end of the second part is connected to the contact hole, and the other end of the second part is connected to the control chip.

[0010] In one embodiment, the touch panel has a display area and a non-display area, and the contact hole is arranged in the non-display area.

[0011] In one embodiment, the second portion is disposed in a non-display area;

[0012] Alternatively, at least part of the second portion is disposed in the display area.

[0013] In one embodiment, the display function layer includes a constant signal line, a blocking dam and an encapsulation layer;

[0014] The touch pattern includes a plurality of first touch patterns and a plurality of second touch patterns;

[0015] The plurality of channels include a sending channel and a receiving channel, one end of the sending channel is connected to the first touch pattern, and the receiving channel is connected to the second touch pattern.

[0016] In one embodiment, the shielding layer is electrically connected to the constant signal line, and the signal of the shielding layer is a constant signal.

[0017] In one embodiment, the signal of the shielding layer is one of VSS, VDD, VGH, and VGL.

[0018] In one embodiment, the constant signal line is connected to the shielding layer through a contact hole.

[0019] In one embodiment, the touch panel further includes a ground line and a protection line, the ground line and / or the protection line are arranged side by side with the channel, and at least a portion of the ground line and / or the protection line is arranged on a side of the display function layer away from the touch pattern.

[0020] In one embodiment, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, and the organic encapsulation layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer;

[0021] The touch pattern is arranged on the encapsulation layer;

[0022] The display function layer adopts OLED display technology.

[0023] In one embodiment, the touch panel has a display area and a non-display area, and the non-display area includes a bending area;

[0024] At least one of the channels is located in the SD layer in the bending area, and the SD layer is a neutral layer in the bending area. At least one of the channels is arranged on a side of the display function layer away from the touch pattern in the display area.

[0025] In one embodiment, the channel portion located in the bending area is connected to the channel portion located in the display area by punching in the non-display area outside the bending area.

[0026] In one embodiment, at least a portion of at least one of the channels is disposed in or on the substrate.

[0027] According to a second aspect of an embodiment of the present application, a display device is provided, comprising a display panel as described in any one of the above.

[0028] The touch panel and display device provided in the embodiments of the present application arrange the channel on the side of the display function layer away from the touch pattern, and use a shielding layer arranged between the channel and the display function layer to shield the signal, so that the channel can be arranged in both the non-display area and the display area, thereby making the wiring area of ​​the channel unrestricted.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] Figure 1 is a schematic diagram of various areas of the touch panel;

[0032] Figure 2 It is a wiring diagram of the channel connecting the control chip and the touch pattern in the touch panel;

[0033] Figure 3 Is the existing touch panel in such Figure 1 Schematic diagram of the cross section at the AA position;

[0034] Figure 4 The touch panel of the embodiment of the present application is Figure 1 Schematic diagram of the cross section at the AA position;

[0035] Figure 5 A wiring diagram of a channel crossing a blocking dam area at a lower frame of an existing touch panel;

[0036] Figure 6 The touch panel of the embodiment of the present application is Figure 1 Schematic diagram of the cross section at the middle BB position;

[0037] Figure 7 Another embodiment of the present application is a touch panel. Figure 1 Schematic diagram of the cross section at the AA position;

[0038] Figure 8 Another embodiment of the present application is a touch panel. Figure 1 Schematic diagram of the cross section at the middle BB position;

[0039] Figure 9-13 It is a wiring diagram of channels in a touch panel of multiple embodiments of the present application using a 1T1R driving architecture;

[0040] Figure 14-16 It is a wiring diagram of channels in a touch panel of multiple embodiments of the present application using a 2T1R driving architecture;

[0041] Fig.17 It is a wiring diagram of channels in a touch panel of multiple embodiments of the present application using a 2T2R driving architecture.

[0042] The symbols in the accompanying drawings are:

[0043] 11. Display area

[0044] 12. Non-display area

[0045] 13. First touch pattern

[0046] 14. Second touch pattern

[0047] 15. Touch panel border

[0048] 16. Barrier dam boundary

[0049] 17. Display area boundaries

[0050] 18. Channel wiring area

[0051] 19. Flattening layer excavation area

[0052] 20. Bending zone

[0053] 21. Border area

[0054] 30. Ground wire

[0055] 31. Protection line

[0056] 33. Control chip

[0057] 34. Sending Channel

[0058] 36. Receiving Channel

[0059] 110. Base

[0060] 120. Channel

[0061] 130. Shielding layer

[0062] 140. EM GOA layer

[0063] 150.Gate GOA layer

[0064] 160. Planarization layer

[0065] 170. Anode

[0066] 180, cathode

[0067] 190. Planarization layer groove

[0068] 200. Support column

[0069] 210. Barrier Dam

[0070] 220. First inorganic encapsulation layer

[0071] 230. Organic encapsulation layer

[0072] 240. Second inorganic encapsulation layer

[0073] 250. Encapsulation layer

[0074] 260, VSS signal line

[0075] 270, VDD signal line

[0076] 300. First insulation layer

[0077] 310. Second insulation layer DETAILED DESCRIPTION

[0078] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0079] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0080] In a touch panel, the touch position is detected by cross-laying transmitting electrodes (Tx electrodes) and receiving electrodes (Rx electrodes) in mutually orthogonal directions on the panel. In the electrode layout scheme proposed by the flexible multi-layer technology on the unit, the transmitting electrodes and the receiving electrodes are made on the packaging layer of the display panel, and the transmitting electrodes and the receiving electrodes are laid out on the same layer to form a touch pattern.

[0081] The channel is used to connect the control chip (IC) and the touch pattern (Sensor). The signal sent by the control chip reaches the touch pattern through the sending channel (Tx Trace), and the electrical signal generated by the touch pattern is received by the control chip through the receiving channel (Rx Trace), thereby realizing the touch function.

[0082] Typically, the channel is designed in the non-display area and needs to be designed within the boundary of the blocking dam, which limits the space for channel wiring. With the development of full-screen displays, the area of ​​the non-display area has become smaller, and the space left for channel wiring has become smaller and smaller. At the same time, with the development of styluses and the improvement of performance such as touch accuracy, the size of a single touch unit in a touch pattern is getting smaller and smaller, and the number of channels is increasing, making the originally insufficient space even more unable to meet the wiring of the channels. How to achieve the wiring of channels in a full-screen or narrow-border screen is a technical problem that needs to be solved urgently by those skilled in the art.

[0083] Figure 1 Schematic diagram of each area of ​​the touch panel. The touch panel is prepared by using the flexible multi-layer technology on the unit. Figure 1 The display panel includes a display area 11 and a non-display area (Border area) 12. The non-display area 12 includes a channel wiring area 18, a planarization layer removal area 19 and a border area 21. The border area 21 also includes a bending area 20.

[0084] The display area 11 is an area used for picture display and is located within an AA area (Active area) boundary 17 . The AA area (Active area) boundary is also called a display area boundary.

[0085] The channel wiring area 18 is an area outside the AA area boundary 17 and within the barrier dam boundary 16 of the non-display area 12. Specifically, the channel wiring area 18 is located within the planarization layer excavation area 19. The channel wiring area 18 is an area where the channel is wired through leads. The channel connects the touch pattern and the control chip of the display area 11, and plays a role in touch signal transmission. In the product prepared by the flexible multi-layer technology on the traditional unit, one end of the channel is connected to the corresponding touch pattern, the main part of the channel is wound in the non-display area 12, and the other end of the channel is connected to the gold finger (Pin) of the control chip after passing through the bending area 20.

[0086] The planarization layer removed area 19 is an area located outside the channel wiring area 18 and within the barrier dam boundary 16 of the non-display area 12 , and mainly serves as a ventilation area.

[0087] The area in the region where the non-display region 12 is located except the channel wiring region 18 and the planarization layer excavation region 19 constitutes a boundary region 21 for forming the boundary of the entire touch panel.

[0088] Depend on Figure 1 It can be seen that in the structure of the existing touch panel, the channel wiring area 18 is located within the barrier dam boundary 16 of the non-display area 12, and the wiring space is very small.

[0089] Figure 2 It is a wiring diagram of the channel between the control chip and the touch pattern in the touch panel. The touch panel is in 2T2R access mode. Figure 2 The touch panel includes a touch pattern, a plurality of channels, a ground line 30 and a protection line 31. The touch pattern is located in the display area 11 ( Figure 2 The plurality of channels include a plurality of transmission channels 34 and a plurality of receiving channels 36. Figure 2 The receiving channel is connected to the touch pattern from the left and right directions, and the sending channel is connected to the touch pattern from the top and bottom directions.

[0090] The touch pattern includes a plurality of sub-touch patterns arranged in an array, and the plurality of sub-touch patterns include a plurality of touch patterns along a first direction ( Figure 2 The first touch patterns 13 arranged in the horizontal direction of the image and the plurality of touch patterns arranged in the second direction ( Figure 2 One end of the plurality of transmission channels 34 is connected to the plurality of rows along the first direction ( Figure 2 One end of each of the plurality of receiving channels 36 is connected to a plurality of columns along the second direction ( Figure 2 When connected with the 2T2R driving architecture, the sending channel 34 is connected to the touch pattern from the upper and lower ends of the touch panel, the receiving channel 36 is connected to the touch pattern from the left and right ends of the display panel, and the other ends are connected to the control chip 33.

[0091] The guard line 31 is formed at least on one side of a portion of the transmission channel 34 and the receiving channel 36. The guard line 31 is provided between the transmission channel 34 and the receiving channel 36 as a shielding structure to prevent signal interference between the transmission channel and the receiving channel.

[0092] Depend on Figure 2It can be seen that the signal sent by the control chip 33 reaches the touch pattern located in the display area 11 through the sending channel 34, and the electrical signal generated by the touch pattern is received by the control chip 33 through the receiving channel 36, and multiple sending channels 34 and receiving channels 36 are used to connect the control chip 33 and the touch pattern.

[0093] Figure 3 Is the existing touch panel in such Figure 1 Schematic diagram of the cross section at the AA position in the middle, with some film layers omitted. Figure 3 The touch panel is made by flexible multi-layer technology on the unit.

[0094] As can be seen from the figure, the touch panel includes a substrate 110, a channel 120, an EM GOA layer 140, a Gate GOA layer 150, a planarization layer 160, an anode 170, a cathode 180, a planarization layer groove 190, a barrier dam 210, a support column 200 and an encapsulation layer 250. The encapsulation layer 250 includes a first inorganic encapsulation layer 220, an organic encapsulation layer 230 and a second inorganic encapsulation layer 240.

[0095] The channel wiring area 18 (combined Figure 1 ) is located above the second inorganic packaging layer 240, and the channel wiring area 18 can be marked with a wiring width, and its wiring width a is determined by the width of the non-display area and needs to be arranged within the barrier dam boundary 16 of the non-display area.

[0096] The boundary of the organic encapsulation layer 230 is located within the boundary of the blocking dam 210 to prevent water vapor at the edge of the touch panel from entering the display area along the organic encapsulation layer 230 and causing display failure. In theory, the boundary of the organic encapsulation layer 230 can be the same as the boundary of the blocking dam 210, but due to the limitation of the printing accuracy of the process for preparing the organic encapsulation layer 230, and the thin thickness of the organic encapsulation layer 230 at the location of the planarization layer excavation area 19 at the edge of the blocking dam 210, the channel wiring area 18 needs to be a certain distance (generally greater than 100 μm) from the blocking dam 210, which makes the area of ​​the channel 120 wiring more limited.

[0097] In view of the above problems, the present application provides a touch panel, such as Figure 4, at least a portion of the channel 120 (especially the channel portion located in the display area 11) is arranged on the side of the display function layer (including the TFT layer, the organic light-emitting layer, etc.) away from the touch pattern (for example, the channel 120 is arranged in the substrate 110 or on the substrate 110), and a shielding layer 130 is arranged between the channel 120 and the display function layer to shield the channel 120 to prevent the display signal (GOA, Data, etc.) from interfering with the touch signal. The above method makes it possible to layout the channel 120 in the display area 11. Therefore, in the embodiment of the present application, the channel 120 can be arranged in the non-display area 12 and the display area 11 at the same time. In addition, the shielding layer 130 can be connected to a constant signal, such as grounding, to achieve a better signal shielding effect.

[0098] Figure 4 The touch panel of the embodiment of the present application is Figure 1 Schematic diagram of the cross section at the AA position in the middle. Figure 4 The wiring diagram of the channel 120 in the non-display area 12 is mainly shown. The touch panel can be prepared by the flexible multi-layer technology on the unit. Figure 4 The touch panel includes a substrate 110, a channel 120, a shielding layer 130, an EM GOA layer 140, a Gate GOA layer 150, a planarization layer 160, an anode 170, a cathode 180, a planarization layer groove 190, a blocking dam 210, a support column 200, an encapsulation layer 250 and a VSS signal line 260. The EM GOA layer 140, the Gate GOA layer 150, the planarization layer 160, the anode 170 and the cathode 180 are all display function layers.

[0099] The substrate 110 may be made of an inorganic material or an organic material. The inorganic material may be a glass material or a metal material. Among them, the glass material may be quartz glass or sapphire glass, and the metal material may be aluminum (Al), nickel (Ni), etc. The organic material may be polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyamide, polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET) or a combination thereof. Among the substrates made of organic materials, a polyimide substrate is more common. The polyimide substrate may include a first PI layer, a first barrier layer, a second PI layer and a second barrier layer arranged in sequence in the thickness direction. Among them, the first barrier layer and the second barrier layer are used to prevent water vapor from penetrating. The channel 120 may be arranged in the second PI layer or in the second barrier layer. Disposing the channel 120 at a relatively upper position inside the substrate 110 (i.e., a position closer to the display function layer) can facilitate the punching of the channel 120 and the connection with the touch pattern.

[0100] The number of the channels 120 is multiple. For a single channel 120, if Figure 4, a portion of the channel 120 may be disposed in the substrate 110 , and another portion of the channel 120 may be disposed above the substrate 110 , such as above the encapsulation layer 250 .

[0101] That is, for the channel 120 at least a portion of which is disposed in the substrate 110, it includes a first portion and a second portion. The first portion (i.e., the portion located above the encapsulation layer 250 in the figure) is disposed in the same layer as the touch pattern, and the second portion (i.e., the portion located in the substrate 110 in the figure) is disposed in the substrate 110, and the first portion and the second portion are connected through a contact hole 290. One end of the first portion is connected to the touch pattern, and the other end of the first portion is connected to the contact hole; one end of the second portion is connected to the contact hole 290, and the other end of the second portion is directly or indirectly connected to the control chip 33.

[0102] The channel 120 may be a sending channel and a receiving channel, one of the sending channel and the receiving channel is used to transmit the signal sent by the control chip to the touch pattern, and the other is used to transmit the signal generated by the touch pattern to the control chip.

[0103] The shielding layer 130 has a constant signal, which is used to prevent the channel 120 (including the sending channel and the receiving channel) from being interfered by external signals. The constant signal can be VSS, VDD, VGH, VGL and other signals. Figure 4 In the embodiment, the constant signal is a VSS signal, and the shielding layer 130 is connected to the VSS signal line 260 through a contact hole thereon to obtain the VSS signal.

[0104] Due to the setting of the shielding layer 130, there are two main wiring methods for the channel 120 in various areas. One method is to connect the constant signal of the constant signal line (for example, the VSS signal line 260) to the shielding layer 130 by punching, so that the shielding layer 130 has a constant signal, and a part of the channel 120 is arranged directly below the shielding layer 130. Another wiring method is that one end of the channel 120 is connected to the touch pattern, and then the vertical display boundary crosses the blocking dam 210 to the periphery of the boundary of the encapsulation layer 250 to punch to the channel in the substrate 110.

[0105] In addition to connecting the shielding layer 130 and the constant signal line by punching holes so that the shielding layer 130 obtains a constant signal, the original constant signal line can also be directly used as the shielding layer. For example, the area of ​​the original VSS signal line 260 or the VDD signal line or the VGH signal line or the VGL signal line can be enlarged so that it covers the channel 120 below with a larger area, thereby better serving as the shielding layer of the channel 120.

[0106] Since the size of a general touch pattern is larger than 3.5 mm, the spacing and line width of the channel 120 for flexible multi-layer wiring on the unit can be designed to be larger, and short circuit and open circuit problems will not occur even if they cross the barrier dam 210. Figure 5 FIG. 1 is a wiring diagram of the channel 120 at the lower frame of a conventional touch panel crossing the barrier dam 210 area. Figure 5 As shown, at the position across the barrier dam 210 , the line width of the channel 120 is greater than 10 μm, and the spacing is greater than 13 μm, and no related disconnection or short circuit failure occurs in the current process.

[0107] The planarization layer 160 is used to form a planarized surface. A planarization layer groove 190 is present inside the planarization layer 160 . The planarization layer groove 190 is a groove dug on the planarization layer 160 to allow gases of various film layers below the planarization layer 160 to overflow better.

[0108] The support column 200 is disposed above the planarization layer 160. During the evaporation process of the organic light-emitting material, static electricity is easily generated when the precision metal mask (FMM) contacts the entire surface of the back glass. The support column 200 is designed as a support to reduce the contact area between the precision mask and the back glass substrate.

[0109] Due to the presence of the planarization layer grooves 190 and the support pillars 200, there are many pits or protrusions on the surface of the planarization layer 160. These uneven designs may easily cause short circuit or open circuit when the channel 120 passes through. Therefore, it is necessary to fill these uneven areas with the encapsulation layer 250, especially the organic encapsulation layer 230, so that the channel 120 is arranged above the flat encapsulation layer 250 to ensure that the channel 120 does not short circuit or open circuit.

[0110] The encapsulation layer 250 includes a first inorganic encapsulation layer 220, an organic encapsulation layer 230 and a second inorganic encapsulation layer 240. The organic encapsulation layer 230 is located between the first inorganic encapsulation layer 220 and the second inorganic encapsulation layer 240. The first inorganic encapsulation layer 220 and the second inorganic encapsulation layer 240 are used to improve the water oxidation resistance of the film layer, and can be made of silicon nitride (SiNx) or silicon oxide (SiOx) materials. The organic encapsulation layer 230 has strong fluidity and is used to increase the flatness of the entire encapsulation layer 250.

[0111] The function of the barrier dam 210 is to prevent the organic encapsulation layer 230 from overflowing. The boundary of the organic encapsulation layer 230 is located within the boundary of the barrier dam 210 to prevent the water vapor at the edge of the touch panel from entering the display area 11 along the organic encapsulation layer 230 and causing display failure. Figure 3 The barrier dam 210 in the touch panel shown has the same function.

[0112] Figure 6 The touch panel of the present application embodiment is as follows Figure 1 Schematic diagram of the cross section at the BB position. Figure 6 , a shielding layer 130 is disposed above the channel 120 disposed in the substrate 110, and the shielding layer 130 can also be disposed in the substrate 110. The channel 120 extends vertically from the display area 11 to the starting line 280 of the bending area, and is connected to the SD layer (the film layer where the source and drain regions of the TFT transistor are located) above the substrate 110 through a hole in front of the starting line 280 of the bending area. The SD layer is a neutral layer in the bending area 20, and is not subjected to tensile and compressive stresses when bending, and is not prone to cracks.

[0113] There are VSS signal lines 260 and VDD signal lines 270 above the channel 120 in the substrate 110, and the VSS signal lines 260 and VDD signal lines 270 are located in the same layer. The VSS signal line 260 is electrically connected to the channel 120 through four connection holes below. The VSS signal is the cathode signal of the OLED pixel, which is connected to the display area 11 from the control chip side, and the VDD signal is the anode signal of the OLED pixel, which is directly connected to the display area 11 from the bottom frame.

[0114] In one embodiment of the present application, the channel 120 may be arranged above the substrate 110, such as Figure 7 , Figure 8 shown. Figure 7 In an embodiment of a touch panel in which a channel is arranged above a substrate, Figure 1 Schematic diagram of the cross section at the AA position in the middle. Figure 8 In the embodiment of the touch panel in which the channel is arranged above the substrate, Figure 1 Schematic diagram of the cross section at the BB position. Figure 7 and Figure 8 A first insulating layer 300 and a second insulating layer 310 are further arranged between the substrate 110 and the display function layer. The first insulating layer 300 covers the substrate 110 , and the second insulating layer 310 is located on a side of the first insulating layer 300 away from the substrate 110 .

[0115] like Figure 7 The second part of the channel 120 is located on the substrate 110 and covered by the first insulating layer 300, the shielding layer 130 is located on the first insulating layer 300 and covered by the second insulating layer 310, and the display function layer is formed on the second insulating layer 310. The first part of the channel 120 is connected to the second part of the channel 120 by punching holes in the first insulating layer 300 and the second insulating layer 310. The VSS signal line 260 is connected to the shielding layer 130 by punching holes in the second insulating layer 310. The structures of the other layers of the touch panel are the same as those of the touch panel. Figure 4 The touch panels are identical.

[0116] like Figure 8 , the channel 120 is located above the substrate 110 and covered by the first insulating layer 300, and the shielding layer 130 is located on the first insulating layer 300 and covered by the second insulating layer 310. The portion of the channel 120 in the first insulating layer 300 vertically extends from the display area 11 to the starting line 280 of the bending area, and passes through the first insulating layer 300 and the second insulating layer 310 through a hole in front of the starting line 280 of the bending area, and then transfers to the SD layer (the film layer where the source and drain of the TFT transistor are located) above the substrate 110. The SD layer is a neutral layer in the bending area 20, and is not subjected to tensile and compressive stress when bending, and is not prone to cracks.

[0117] The VSS signal line 260 is connected to the shielding layer 130 by drilling a hole in the second insulating layer 310. The structures of the other layers of the touch panel are similar to those of the Figure 6 The touch panels are identical.

[0118] In a specific embodiment, the TFT layer in the display function layer may include, from bottom to top, an active layer (active), a first gate insulating layer (GI1), a first gate (Gate1), a second gate insulating layer (GI2), a second gate (Gate2), an interlayer dielectric layer (ILD), a first SD layer, a first planarization layer (PLN1), a second SD layer and a second planarization layer (PLN2). The organic light-emitting layer in the display function layer may include an anode layer (anode) located on the second planarization layer, a light-emitting material layer located on the anode layer (anode), and a cathode layer located on the light-emitting material layer. The encapsulation layer is located above the cathode layer. In the above Figure 8 In the embodiment, the SD layer where the channel 120 in the bending region is located may be the first SD layer or the second SD layer. In addition, the second portion of the channel 120 may be a film layer disposed between the SD layer and the substrate 110, preferably a film layer disposed between the active layer and the substrate 110. The material of the channel 120 may be a metal (including alloys and metal oxides), such as copper, aluminum, silver, ITO, etc.

[0119] Figure 9-Figure 17 Schematic diagram of the wiring of channels in different types of touch panels. In each of the above touch panels, the channels can be divided into two types: a transmitting channel 34 and a receiving channel 36. One end of the transmitting channel 34 and the receiving channel 36 is connected to the touch pattern in the display area, and the other end of the transmitting channel 34 and the receiving channel 36 is connected to the control chip 33.

[0120] The materials of the transmitting channel 34 and the receiving channel 36 may be metal, conductive metal oxide, conductive polymer, conductive composite material or a combination thereof. The metal material may be gold (Au), silver (Ag), aluminum (Al), platinum (Pt), copper (Cu), molybdenum (Mo), titanium (Ti), calcium (Ca), magnesium (Mg) or a combination thereof, the conductive metal oxide may be indium oxide (InO2), tin oxide (SnO2), indium tin oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide or a combination thereof, the conductive polymer may be polyaniline (PANI), polythiophene (PT), polyacetylene (PE) or a combination thereof, and the conductive composite material may be a conductive composite material dispersed with carbon black, graphite powder, metal particles, etc.

[0121] Figure 9-13 The touch panels shown all use a 1T1R drive architecture. Figure 14-16 The touch panels shown all use a 2T1R drive architecture. Fig.17 The touch panel shown adopts the 2T2R driving architecture. In the 1T1R driving architecture, the receiving channel usually accesses the touch pattern located in the display area from the left or right side, and the transmitting channel usually accesses the touch pattern from the top or bottom side; in the 2T1R driving architecture, the receiving channel usually accesses the touch pattern from the left or right side, and the transmitting channel usually accesses the touch pattern from the top and bottom sides; in the 2T2R driving architecture, the receiving channel usually accesses the touch pattern from the left and right sides, and the transmitting channel usually accesses the touch pattern from the top and bottom sides.

[0122] In the 1T1R driving architecture of the embodiment of the present application, there are mainly eight wiring methods for the receiving channel and the transmitting channel to realize the connection with the touch pattern, namely: access from the bottom of the transmitting channel and access from the left side of the receiving channel; access from the bottom of the transmitting channel and access from the right side of the receiving channel; access from the top of the transmitting channel and access from the left side of the receiving channel; access from the top of the transmitting channel and access from the right side of the receiving channel; access from the left side of the transmitting channel and access from the top of the receiving channel; access from the left side of the transmitting channel and access from the bottom of the receiving channel; access from the right side of the transmitting channel and access from the top of the receiving channel; access from the right side of the transmitting channel and access from the bottom of the receiving channel.

[0123] Figure 9-13 The wiring method adopted in the embodiment is that the sending channel 34 is connected from the bottom and the receiving channel 36 is connected from the left. The touch pattern is located at the boundary 16 of the barrier dam (combined with Figure 1 ), more precisely, the touch pattern is located within the display area boundary 17.

[0124] Figure 9-12 This is an embodiment in which the left and right borders of the touch panel are relatively small. Fig. 9, the left and right frames of the touch panel are relatively small, and there is not enough space to arrange the routing of the channel 120. At this time, the channel 120 (BP) that exceeds the wiring space of the left frame is routed into the substrate 110 (or on the substrate 110) through a punched jumper, which can ensure that the channel 120 in the wiring space is still routed on the flexible multi-layer film layer on the unit. The reference number 290 in the figure corresponds to the punching location, that is, the location of the contact hole for implementing the jumper. The wiring of the lower frame is sufficient, so the channel 120 in the lower frame portion is designed for routing through the flexible multi-layer film layer on the unit, that is, the channel 120 in the lower frame portion is arranged on the same layer as the flexible multi-layer film layer (or touch pattern) on the unit.

[0125] When the left and right frames of the touch panel are small, there is not enough space to arrange the channel 120 wiring, and the channel 120 of the left frame exceeds the wiring space, the following can be used: Fig.10 In the wiring method shown, all the channels 120 (BP) of the left frame are connected to the substrate 110 (or on the substrate 110) through punching for routing. The channels 120 for routing in the substrate 110 (or on the substrate 110) can be arranged in the entire non-display area, that is, they can be arranged outside the barrier dam 210. The wiring of the lower frame is sufficient, so the channels 120 of the lower frame part are designed for routing through the flexible multilayer (FMLOC) film layer on the unit, that is, the channels 120 of the lower frame part are arranged on the same layer as the flexible multilayer film layer (or touch pattern) on the unit.

[0126] exist Fig.11 In the embodiment shown, even if the channel 120 of the left frame is jumped to the substrate 110 (or on the substrate 110) for routing, the non-display area cannot provide sufficient wiring space. In this case, a portion (the channel at the bottom in the figure) of the channel 120 (BP) disposed in the substrate 110 (or on the substrate 110) can be routed in the non-display area, and a portion (the channel at the top in the figure) can be arranged in the display area. The lower frame has sufficient wiring, so the channel 120 of the lower frame is designed for routing through the flexible multi-layer film layer on the unit, that is, the channel 120 of the lower frame is disposed on the same layer as the flexible multi-layer film layer (or touch pattern) on the unit. Of course, it can also be as follows Fig.12 As shown in FIG. 1 , all channels 120 (BP) accessed from the left frame side first enter the substrate 110 (or on the substrate 110) through the contact hole 290 for routing, and then return to the display area along the horizontal direction in the substrate 110 for routing, and extend vertically in the display area to the bending area 20. In the area from the contact hole 290 to the bending area 20, the channels 120 are all arranged in the substrate 110 (or on the substrate 110).

[0127] Fig.13 This corresponds to an embodiment in which the left frame, the right frame and the bottom frame of the touch panel are all relatively small. Fig.13The left, right and bottom frames of the touch panel are relatively small, and there is not enough space for arranging the channel 120. The channels 120 on the left and bottom sides can be routed by punching holes into the substrate 110 (or on the substrate 110). The reference numeral 290 in the figure corresponds to the punching location, which is the location of the contact hole for implementing the jumper.

[0128] In the 2T1R driving architecture of the embodiment of the present application, there are four main wiring methods for the receiving channel and the transmitting channel to achieve connection with the touch pattern, namely: access to the upper and lower sides of the transmitting channel, and access to the left side of the receiving channel; access to the upper and lower sides of the transmitting channel, and access to the right side of the receiving channel; access to the left and right sides of the transmitting channel, and access to the upper side of the receiving channel; access to the left and right sides of the transmitting channel, and access to the lower side of the receiving channel.

[0129] Figure 14-16 The wiring method adopted in the embodiment is that the sending channel 34 is connected from the upper side and the lower side, and the receiving channel 36 is connected from the left side. The touch pattern is located at the boundary 16 of the barrier dam (combined with Figure 1 ), more precisely, the touch pattern is located within the display area boundary 17.

[0130] Fig.14 This is an embodiment in which the upper border, the left border and the right border are relatively small. Fig.14 When the upper frame, left frame and right frame are small, the touch panel does not have enough space to arrange the channel 120 wiring. The channel 120 (BP) of the left frame and the upper frame can be jumpered to the substrate 110 (or on the substrate 110) through punching for channel routing, and the channel routing is in the entire non-display area. The reference numeral 290 in the figure corresponds to the punching location, that is, the location of the contact hole for implementing the jumper. Since the lower frame meets the wiring space, the channel 120 of the lower frame can still be designed to be wired on the flexible multi-layer film layer on the unit, that is, the channel 120 of the lower frame part is arranged on the same layer as the flexible multi-layer film layer (or touch pattern) on the unit.

[0131] When the upper frame, the left frame and the right frame are small and cannot meet the wiring requirements of the channel 120, the channel 120 (BP) connected from the upper frame can also be set in the display area. Fig.15 As shown, one end (the upper end in the figure) of the channel 120 (BP) is connected to the touch pattern, and then extends upward into the non-display area, and extends to the substrate 110 (or on the substrate 110) through the contact hole 290 in the non-display area; the channel 120 (BP) in the substrate 110 (or on the substrate 110) extends downward again into the display area and passes through the entire display area into the bending area 20 below to connect with the control chip. From the contact hole 290 to the bending area 20, the channel 120 (BP) is located in the substrate 110 (or on the substrate 110).

[0132] When the upper frame, the lower frame, the left frame and the right frame are small and there is not enough space to arrange the channel 120 wiring, the channel 120 (BP) at the upper frame, the lower frame, the left frame and the right frame can be connected to the substrate 110 (or on the substrate 110) through punching jumpers to route the channel 120, such as Fig.16 As shown, the channel 120 (BP) for routing in the substrate 110 (or on the substrate 110) may be entirely or mainly disposed in the non-display area.

[0133] In the 2T2R driving architecture of the embodiment of the present application, there are mainly two wiring methods for the receiving channel and the transmitting channel, namely: the transmitting channel is connected from the upper and lower sides, and the receiving channel is connected from the left and right sides; the receiving channel is connected from the upper and lower sides, and the transmitting channel is connected from the left and right sides.

[0134] When the upper frame, left frame, right frame and lower frame are small and there is not enough space to arrange the channel 120 wiring, the channels 120 of the upper frame, left frame, right frame and lower frame can be connected to the substrate 110 (or on the substrate 110) through punching jumpers for channel 120 wiring. Fig.17 As shown, the channel 120 connected from the left frame, the right frame and the bottom frame first extends to the non-display area, and then enters the substrate 110 (or on the substrate 110) by punching jumpers. The channel 120 (BP) set in the substrate 110 (or on the substrate 110) is all or mainly wired in the non-display area, and is routed to the bending area 20 below to connect with the control chip. The channel 120 connected from the upper frame first extends upward into the non-display area, and extends to the substrate 110 (or on the substrate 110) in the non-display area by punching jumpers; the channel 120 (BP) in the substrate 110 (or on the substrate 110) extends downward again into the display area and passes through the entire display area to enter the bending area 20 below to connect with the control chip. The number 290 in the figure corresponds to the punching location, that is, the location of the contact hole for implementing the jumper. From the contact hole 290 to the bending region 20 , the channel 120 (BP) is located in the substrate 110 (or on the substrate 110 ).

[0135] The present application also provides a display device, which includes the touch panel as described above. The display device can be a device with a display function such as a television, a notebook, or a mobile phone.

[0136] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0137] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A touch panel, characterized in that: The touch panel includes a substrate, and a display function layer and a touch pattern sequentially formed on the substrate, wherein the touch pattern transmits touch signals to a control chip through a plurality of channels; At least a portion of at least one of the channels is disposed on a side of the display function layer away from the touch pattern, and a shielding layer is disposed between the display function layer and the channel.

2. The touch panel according to claim 1, characterized in that: At least one of the channels includes a first portion and a second portion, the first portion is disposed in the same layer as the touch pattern, the second portion is disposed on a side of the display function layer away from the touch pattern, and the first portion and the second portion are connected via a contact hole; One end of the first portion is connected to the touch pattern, and the other end of the first portion is connected to the contact hole; One end of the second part is connected to the contact hole, and the other end of the second part is used to connect to the control chip.

3. The touch panel according to claim 2, characterized in that: The touch panel has a display area and a non-display area, and the contact hole is arranged in the non-display area.

4. The touch panel according to claim 3, characterized in that: The second portion is disposed in a non-display area; Alternatively, at least part of the second portion is disposed in the display area.

5. The touch panel according to claim 1, characterized in that: The display function layer includes a constant signal line, a blocking dam and a packaging layer; The touch pattern includes a plurality of first touch patterns and a plurality of second touch patterns; The plurality of channels include a sending channel and a receiving channel, one end of the sending channel is connected to the first touch pattern, and one end of the receiving channel is connected to the second touch pattern.

6. The touch panel according to claim 5, characterized in that: The shielding layer is electrically connected to the constant signal line, and the signal of the shielding layer is a constant signal.

7. The touch panel according to claim 6, characterized in that: The signal of the shielding layer is one of VSS, VDD, VGH and VGL.

8. The touch panel according to claim 6, characterized in that: The constant signal line is connected to the shielding layer through a contact hole.

9. The touch panel according to claim 5, characterized in that: The touch panel further includes a grounding line and a protection line. The grounding line and / or the protection line are arranged side by side with the channel. At least part of the grounding line and / or the protection line is arranged on a side of the display function layer away from the touch pattern.

10. The touch panel according to claim 5, characterized in that: The encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, wherein the organic encapsulation layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer; The touch pattern is arranged on the encapsulation layer; The display function layer adopts OLED display technology.

11. The touch panel according to claim 1, characterized in that: The touch panel has a display area and a non-display area, and the non-display area includes a bending area; At least one of the channels is located in the SD layer in the bending area, and the SD layer is a neutral layer in the bending area. At least one of the channels is arranged on a side of the display function layer away from the touch pattern in the display area.

12. The touch panel according to claim 11, characterized in that: The channel portion located in the bending area is connected to the channel portion located in the display area by punching in the non-display area outside the bending area.

13. The touch panel according to claim 1, characterized in that: At least a portion of at least one of the channels is disposed in or on the substrate.

14. A display device, characterized in that: It comprises the touch panel as claimed in any one of claims 1 to 13.

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