Touch display module and electronic equipment

Abstract

The embodiment of the invention provides a touch display module and electronic equipment, and is applied to the technical field of electronics. The touch display module comprises a display panel, a touch layer and a peep-proof layer, the touch layer is located on the light emitting side of the display panel, the peep-proof layer is located on the side, away from the display panel, of the touch layer, and the peep-proof layer comprises a dimming film layer and a first electrode layer which are sequentially stacked in the thickness direction of the display panel; the first electrode layer comprises a plurality of first electrodes extending in the first direction, each first electrode is a strip-shaped electrode, a gap exists between every two adjacent first electrodes, and the dimming film layer is used for being in a light transmitting state or a light shading state at least under the action of voltage applied by the first electrodes. In this way, the peep-proof function of the touch display module can be achieved through the peep-proof layer; moreover, the first electrode layer is patterned, so that the shielding effect of the first electrode layer on the touch electrodes in the touch layer is reduced, and the touch display module can normally achieve the touch function.

Description

Technical Field

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

[0002] With the continuous development of electronic technology, electronic devices with touch functions have gradually become a common tool in people's daily life and work. In addition, in recent years, users have paid more and more attention to the protection of personal privacy, but some electronic devices have a large viewing angle range and do not have anti-peeping effect, resulting in the user's browsing information being peeped by others when using electronic devices in public places such as subways, buses or high-speed trains, which can easily lead to the leakage of personal privacy.

[0003] Therefore, how to realize the anti-peeping function in a touch display module with a touch function has become a problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application provide a touch display module and an electronic device. An anti-peeping layer is provided on a side of the touch layer away from the display panel, and the first electrode layer in the anti-peeping layer is patterned to reduce the shielding effect of the first electrode layer on the touch electrode in the touch layer, so that the touch display module can realize both a touch function and an anti-peeping function.

[0005] In the first aspect, the embodiment of the present application proposes a touch display module, comprising: a display panel; a touch layer, located on the light-emitting side of the display panel; an anti-peeping layer, located on the side of the touch layer away from the display panel; the anti-peeping layer comprises a dimming film layer and a first electrode layer, and the dimming film layer and the first electrode layer are sequentially stacked in the thickness direction of the display panel. Among them, the first electrode layer comprises a plurality of first electrodes extending along a first direction, each first electrode is a strip electrode, and there is a gap between two adjacent first electrodes; the dimming film layer is used to present a light-transmitting state or a light-shielding state at least under the action of the voltage applied by the plurality of first electrodes; when the dimming film layer presents a light-transmitting state, the touch display module is in a non-peeping mode; when the dimming film layer presents a light-shielding state, the touch display module is in an anti-peeping mode.

[0006] In this way, by setting an anti-peeping layer on the side of the touch layer away from the display panel, the touch display module can realize the anti-peeping function; and, since the first electrode layer in the anti-peeping layer includes a plurality of first electrodes extending along the first direction, and there is a gap between two adjacent first electrodes, the first electrode layer is patterned to reduce the shielding effect of the first electrode layer on the touch electrode in the touch layer, so that the touch display module can normally realize the touch function.

[0007] In a possible implementation, the first electrode layer further includes a plurality of first virtual electrodes, which are arranged in the same layer as the first electrodes, and each first virtual electrode is located in the gap between two adjacent first electrodes; wherein the transmittance of the first virtual electrode is the same as the transmittance of the first electrode. In this way, when the dimming film layer is in a light-transmitting state, the transmittance at the position where the first electrode is located tends to be consistent with the transmittance at the position where the first virtual electrode is located, so as to reduce the brightness difference between the touch display module at the position where the first electrode is located and the gap between two adjacent first electrodes, thereby improving the visual effect of the touch display module.

[0008] In a possible implementation, the anti-peeping layer also includes a first electrode control layer, and the first electrode control layer and the first electrode layer are both located on the same side of the dimming film layer. The first electrode control layer includes: a second electrode layer, the second electrode layer includes a plurality of second electrodes extending along the second direction, each second electrode is a strip electrode, and there is a gap between two adjacent second electrodes, and the second direction intersects with the first direction; a plurality of third electrodes, each third electrode is located in an area defined by the intersection of the plurality of first electrodes and the plurality of second electrodes; a plurality of switch tubes, the gate of each switch tube is connected to the second electrode, the first pole of each switch tube is connected to the first electrode, and the second pole of each switch tube is connected to the third electrode. Among them, the plurality of switch tubes located in the same row in the second direction are connected to the same second electrode, and the plurality of switch tubes located in the same row in the first direction are connected to the same first electrode, and each switch tube is used to disconnect during the touch stage to control the third electrode connected to it to be in a suspended state. In this way, when the touch display module is working in the display stage, the switch tube can be controlled to be turned on by controlling the voltage signal applied to the second electrode, and the voltage signal applied to the first electrode can be written to the third electrode through the turned-on switch tube, so that the third electrode can also control the dimming film layer to present a light-transmitting state or a light-shielding state, so as to further improve the anti-peeping effect of the touch display module; and, when the touch display module is working in the touch stage, the switch tube can be controlled to be disconnected by controlling the voltage signal applied to the second electrode, so that the third electrode connected to the disconnected switch tube is in a suspended state, so as to reduce the shielding effect of the third electrode on the touch electrode in the touch layer.

[0009] In a possible implementation, each third electrode is disposed in the same layer as the first electrode, and the orthographic projection of each third electrode on the display panel does not overlap with the orthographic projection of the first electrode on the display panel. In this way, by disposing the third electrode in the same layer as the first electrode, the thickness of the anti-peeping layer can be reduced, thereby reducing the thickness of the touch display module.

[0010] In a possible implementation, the second electrode layer and the first electrode layer are arranged in different layers, an insulating layer is arranged between the second electrode layer and the first electrode layer, and the first electrode layer is located on the side of the second electrode layer close to the dimming film layer. In this way, by arranging an insulating layer between the second electrode layer and the first electrode layer, the mutual influence between the voltage signal applied to the second electrode and the voltage signal applied to the first electrode can be reduced; and by arranging the first electrode layer on the side of the second electrode layer close to the dimming film layer, the first electrode layer is closer to the dimming film layer, so that the voltage signal applied to the first electrode can control the dimming film layer to present a light-transmitting state or a light-shielding state, thereby improving the control effect of the voltage signal applied to the first electrode on the dimming film layer.

[0011] In a possible implementation, each switch tube includes an active layer, a gate, a first electrode, and a second electrode; a first insulating layer is provided between the active layer and the gate, and a second insulating layer is provided between the gate and the first electrode and the second electrode; wherein the gate and the second electrode are provided in the same layer, and the first electrode and the second electrode are provided in the same layer as the first electrode. In this way, the gate and the second electrode are provided in the same layer, and the first electrode and the second electrode are provided in the same layer as the first electrode, which can reduce the thickness of the touch display module.

[0012] In a possible implementation, the first electrode layer is located on a side of the dimming film layer away from the display panel, or the first electrode layer is located on a side of the dimming film layer close to the display panel. Thus, an implementation of arranging the first electrode layer on a single side of the dimming film layer is provided.

[0013] In a possible implementation, a plurality of first electrodes are divided into a plurality of first electrode groups, and each first electrode group includes two adjacent first electrodes. The dimming film layer is specifically used for presenting a light-shielding state when the first voltage signal and the second voltage signal are applied to the two adjacent first electrodes in each first electrode group, respectively; and presenting a light-transmitting state when the third voltage signal is applied to the two adjacent first electrodes in each first electrode group or when no voltage signal is applied. Among them, the first voltage signal, the second voltage signal and the third voltage signal are all DC voltage signals, and the voltage difference between the voltage of the first voltage signal and the voltage of the second voltage signal is greater than the first voltage threshold. In this way, the first electrode layer is set on one side of the dimming film layer, and the dimming film layer is controlled to present a light-transmitting state or a light-shielding state through the parallel electric field between the plurality of first electrodes in the first electrode layer, which can reduce the thickness of the anti-peeping layer, thereby reducing the thickness of the touch display module, and can reduce the process complexity of the touch display module.

[0014] In a possible implementation, the anti-peeping layer also includes a third electrode layer, and the first electrode layer and the third electrode layer are respectively located on both sides of the dimming film layer in the thickness direction of the display panel. The third electrode layer includes a plurality of fourth electrodes extending along the first direction, each fourth electrode is a strip electrode, and there is a gap between two adjacent fourth electrodes; the orthographic projection of each fourth electrode on the display panel overlaps with the orthographic projection of the first electrode on the display panel. In this way, the dimming film layer can be controlled to present a light-transmitting state or a light-shielding state through the first electrode layer and the third electrode layer on both sides of the dimming film layer; and the orthographic projection of each fourth electrode in the third electrode layer on the display panel overlaps with the orthographic projection of the first electrode on the display panel, so as to reduce the shielding effect of the third electrode layer on the touch electrode in the touch layer, so that the touch display module can normally realize the touch function.

[0015] In a possible implementation, a plurality of fourth electrodes are divided into a plurality of second electrode groups, and each second electrode group includes two adjacent fourth electrodes. The dimming film layer is also used for presenting a light-shielding state when the first voltage signal and the second voltage signal are applied to the two adjacent fourth electrodes in each second electrode group, respectively; and presenting a light-transmitting state when the third voltage signal is applied to the two adjacent fourth electrodes in each second electrode group or when no voltage signal is applied. Wherein, for the first electrode and the fourth electrode whose orthographic projections on the display panel have an overlapping area, the voltage of the voltage signal applied is the same; the first voltage signal, the second voltage signal and the third voltage signal are all DC voltage signals, and the voltage difference between the voltage of the first voltage signal and the voltage of the second voltage signal is greater than the first voltage threshold. In this way, the dimming film layer is controlled to present a light-transmitting state or a light-shielding state by the parallel electric field between the plurality of first electrodes in the first electrode layer and the parallel electric field between the plurality of fourth electrodes in the third electrode layer, so as to improve the anti-peeping display effect of the touch display module.

[0016] In a possible implementation, the dimming film layer is specifically used to present a light-shielding state when a fourth voltage signal is applied to each first electrode and a fifth voltage signal is applied to each fourth electrode; and to present a light-transmitting state when a sixth voltage signal is applied to each first electrode and a seventh voltage signal is applied to each fourth electrode. The fourth voltage signal, the fifth voltage signal, the sixth voltage signal and the seventh voltage signal are all DC voltage signals; the voltage difference between the voltage of the fourth voltage signal and the voltage of the fifth voltage signal is greater than the second voltage threshold, the voltage difference between the voltage of the sixth voltage signal and the voltage of the seventh voltage signal is less than the third voltage threshold, and the second voltage threshold is greater than or equal to the third voltage threshold. In this way, the dimming film layer can be controlled to present a light-transmitting state or a light-shielding state by the vertical electric field between the first electrode in the first electrode layer and the fourth electrode in the third electrode layer.

[0017] In a possible implementation, the third electrode layer further includes a plurality of second virtual electrodes, the second virtual electrodes are arranged in the same layer as the fourth electrodes, and each second virtual electrode is located in the gap between two adjacent fourth electrodes; wherein the transmittance of the second virtual electrode is the same as the transmittance of the fourth electrode. In this way, by arranging the second virtual electrode in the third electrode layer, when the dimming film layer is in a light-transmitting state, the transmittance at the position where the fourth electrode is located tends to be consistent with the transmittance at the position where the second virtual electrode is located, so as to reduce the brightness difference of the touch display module at the position where the fourth electrode is located and the gap between two adjacent fourth electrodes, thereby improving the visual effect of the touch display module.

[0018] In a possible implementation, the anti-peeping layer also includes a second electrode control layer, and the second electrode control layer and the third electrode layer are both located on the same side of the dimming film layer; wherein the layer structure included in the second electrode control layer is the same as the layer structure included in the first electrode control layer located on the other side of the dimming film layer, and is symmetrically arranged relative to the dimming film layer. In this way, when the touch display module works in the display stage, the anti-peeping effect of the touch display module can be further improved by the second electrode control layer; and when the touch display module works in the touch stage, the switch tube in the second electrode control layer can be controlled to be disconnected, so that the electrode connected to the switch tube in the second electrode control layer is in a suspended state, thereby reducing the shielding effect on the touch electrode in the touch layer.

[0019] In a possible implementation, the gap between two adjacent first electrodes is greater than or equal to 980 micrometers. In this way, by properly setting the gap between two adjacent first electrodes, the shielding effect of the first electrode layer on the touch electrode in the touch layer can be reduced.

[0020] In a possible implementation, the dimming film layer includes a polymer dispersed liquid crystal layer or an electrochromic layer.

[0021] In a possible implementation, the electrochromic layer includes a plurality of electrochromic portions extending along a third direction, each electrochromic portion is distributed in a strip shape, and there is a gap between two adjacent electrochromic portions; the third direction intersects with the first direction. In this way, by patterning the electrochromic layer, the electrochromic layer includes a plurality of electrochromic portions arranged at intervals, so as to improve the anti-peeping effect of the touch display module.

[0022] In a possible implementation, the material of the first electrode is a transparent conductive material; or the first electrode includes a plurality of metal grids. In this way, when the touch display module is in a non-peeping mode, the first electrode can reduce the blocking of light emitted by the display panel, thereby improving the display brightness of the touch display module.

[0023] In a possible implementation, the privacy layer further includes a first substrate and a second substrate, the first substrate being located on a side of the dimming film layer away from the first electrode layer, and the second substrate being located on a side of the first electrode layer away from the dimming film layer. The touch display module further includes: a polarizer, a first adhesive layer, a second adhesive layer, and a cover plate; the polarizer and the first adhesive layer are located between the touch layer and the privacy layer, and the first adhesive layer is located on a side of the polarizer away from the display panel; the second adhesive layer is located on a side of the privacy layer away from the display panel; the cover plate is located on a side of the second adhesive layer away from the display panel. In this way, the provision of the first substrate and the second substrate facilitates the production of the dimming film layer and the first electrode layer; and the polarizer can block the reflection of external light to improve the contrast of the touch display module, and the cover plate can protect the privacy layer, touch layer, display panel and other structures located thereunder.

[0024] In a second aspect, an embodiment of the present application provides an electronic device, comprising a housing and the above-mentioned touch display module, wherein the touch display module is mounted on the housing.

[0025] The possible implementation methods of the second aspect have effects similar to those of the first aspect and possible designs of the first aspect, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of an electronic device provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the electronic device shown;

[0028] Figure 3 A cross-sectional schematic diagram of a first touch display module in which an anti-peeping layer is located above a touch layer provided in an embodiment of the present application;

[0029] Figure 4 for Figure 3 A schematic top view of an anti-peeping layer in a touch display module is shown;

[0030] Figure 5 A cross-sectional schematic diagram of a second touch display module in which the anti-peeping layer is located above the touch layer provided in an embodiment of the present application;

[0031] Figure 6 A cross-sectional schematic diagram of a third touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located above the touch layer;

[0032] Figure 7 A cross-sectional schematic diagram of a fourth touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located above the touch layer;

[0033] Figure 8 for Figure 7 A schematic top view of an anti-peeping layer in a touch display module is shown;

[0034] Fig. 9 A cross-sectional schematic diagram of a fifth touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located above the touch layer;

[0035] Fig.10 A curve relationship diagram of a touch signal ratio and a distance between two adjacent first electrodes in a first electrode layer provided in an embodiment of the present application;

[0036] Fig.11 A schematic diagram of the structure of a touch electrode provided in an embodiment of the present application;

[0037] Fig.12 A schematic diagram of the structure of another touch electrode provided in an embodiment of the present application;

[0038] Fig.13 A schematic diagram of the structure of another touch electrode provided in an embodiment of the present application;

[0039] Fig.14 A cross-sectional schematic diagram of a first touch display module in which electrodes in the privacy protection layer provided in an embodiment of the present application are reused as touch electrodes;

[0040] Fig.15 for Fig.14 A schematic top view of an anti-peeping layer in a touch display module is shown;

[0041] Fig.16 A cross-sectional schematic diagram of a second touch display module in which electrodes in the anti-peep layer provided in an embodiment of the present application are reused as touch electrodes;

[0042] Fig.17 A cross-sectional schematic diagram of a third touch display module in which the electrodes in the privacy protection layer provided in an embodiment of the present application are reused as touch electrodes;

[0043] Fig.18 A cross-sectional schematic diagram of a fourth touch display module in which the electrodes in the privacy protection layer provided in an embodiment of the present application are reused as touch electrodes;

[0044] Fig.19 for Fig.18 A schematic top view of an anti-peeping layer in a touch display module is shown;

[0045] Fig. 20 A timing diagram of a voltage signal applied to the electrodes in the privacy protection layer when the electrodes in the privacy protection layer are reused as touch electrodes provided in the embodiment of the application;

[0046] Fig.21Another timing diagram of voltage signals applied to electrodes in the privacy protection layer when the electrodes in the privacy protection layer are reused as touch electrodes provided in an embodiment of the present application;

[0047] Fig. 22 A cross-sectional schematic diagram of a first touch display module in which the anti-peeping layer is located below the touch layer provided in an embodiment of the present application;

[0048] Fig.23 A cross-sectional schematic diagram of a second touch display module in which the anti-peeping layer is located below the touch layer provided in an embodiment of the present application;

[0049] Fig.24 A cross-sectional schematic diagram of a third touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located below the touch layer;

[0050] Fig.25 A cross-sectional schematic diagram of a fourth touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located below the touch layer. DETAILED DESCRIPTION

[0051] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first chip and the second chip are only used to distinguish different chips, and their order is not limited. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit them to be different.

[0052] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0053] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0054] With the continuous development of electronic technology, electronic devices with touch functions have gradually become a common tool in people's daily life and work. In addition, in recent years, users have paid more and more attention to the protection of personal privacy, but some electronic devices have a large viewing angle range and do not have anti-peeping effect, resulting in the user's browsing information being peeped by others when using electronic devices in public places such as subways, buses or high-speed trains, which can easily lead to the leakage of personal privacy.

[0055] Therefore, in order to enable electronic devices to achieve touch functions while meeting users' privacy needs, some related technologies can attach anti-peeping films to the screen surfaces of electronic devices with touch functions, so that the electronic devices have both touch functions and anti-peeping functions.

[0056] Among them, the privacy film can be a louver film, which uses the louver optical privacy principle, through the parallel arrangement of grating structures (i.e. louvers), so that the light emitted by the electronic device can only be emitted from a certain angle range, and the light at other angles will be blocked by the grating structure, thereby reducing the visible angle range of the electronic device to achieve the privacy protection effect. The visible angle range refers to the angle range when the user can clearly view the information displayed by the electronic device from different directions.

[0057] Although the method of attaching an anti-peep film on the screen surface of an electronic device is simple and convenient to operate, the anti-peep film has a poor transmittance, which will reduce the clarity of the electronic device screen and make the screen granular, thereby affecting the visual effect of the electronic device when displaying; and the method of attaching an anti-peep film on the screen surface of an electronic device also cannot switch the electronic device between anti-peep mode and non-anti-peep mode.

[0058] Based on this, the embodiment of the present application provides a touch display module and an electronic device, the touch display module includes a display panel, a touch layer and an anti-peeping layer, the touch layer is located on the light-emitting side of the display panel, the anti-peeping layer is located on the side of the touch layer away from the display panel, the anti-peeping layer includes a dimming film layer and a first electrode layer, the dimming film layer and the first electrode layer are stacked in sequence in the thickness direction of the display panel. Among them, the first electrode layer includes a plurality of first electrodes extending along a first direction, each first electrode is a strip electrode, and there is a gap between two adjacent first electrodes; the dimming film layer is used to present a light-transmitting state or a light-shielding state under the action of at least the voltage applied by the plurality of first electrodes; when the dimming film layer presents a light-transmitting state, the touch display module is in a non-peeping mode; when the dimming film layer presents a light-shielding state, the touch display module is in an anti-peeping mode.

[0059] In this way, by setting an anti-peeping layer on the side of the touch layer away from the display panel, the touch display module can realize the anti-peeping function; and, since the first electrode layer in the anti-peeping layer includes a plurality of first electrodes extending along the first direction, and there is a gap between two adjacent first electrodes, the first electrode layer is patterned to reduce the shielding effect of the first electrode layer on the touch electrode in the touch layer, so that the touch display module can normally realize the touch function.

[0060] Moreover, the embodiment of the present application sets an anti-peeping layer on the side of the touch layer away from the display panel. Compared with the method of attaching an anti-peeping film on the screen surface of the electronic device in the related art, it will not affect the transmittance of the touch display module too much, and will not reduce the clarity of the electronic device screen too much, and can reduce the graininess of the screen, thereby improving the visual effect of the electronic device when displaying. In addition, the embodiment of the present application sets an anti-peeping layer on the side of the touch layer away from the display panel, and the first electrode layer in the anti-peeping layer can control the dimming film layer to present a light-transmitting state or a light-shielding state, so that the touch display module can switch between non-peeping mode and anti-peeping mode.

[0061] Figure 1 A schematic diagram of the three-dimensional structure of an electronic device provided in an embodiment of the present application, Figure 2 for Figure 1 The exploded structure diagram of the electronic device shown is shown. Figure 1 and Figure 2 As shown, taking the electronic device as a mobile phone as an example, the electronic device can include a touch display module 10 and a housing 20 , and the touch display module 10 is installed on the housing 20 .

[0062] The housing 20 includes a middle frame 21 and a back cover 22. The middle frame 21 is located between the touch display module 10 and the back cover 22. The touch display module 10 and the back cover 22 are respectively connected to the middle frame 21 to realize the installation of the touch display module 10 on the housing 20. In addition, a receiving cavity can be formed between the middle frame 21 and the back cover 22 to accommodate electronic components such as batteries, camera modules, main boards, and small boards (not shown). Figure 2 ).

[0063] In some embodiments, the middle frame 21 and the back cover 22 may be an integrally formed structure to enhance the compactness of the structure of the electronic device and reduce the possibility that the electronic components inside the electronic device will be damaged due to the detachment of the back cover 22 when the electronic device falls. In other embodiments, the middle frame 21 and the back cover 22 may also be connected in a detachable manner to facilitate the repair or replacement of electronic components such as batteries and circuit boards inside the electronic device, thereby increasing the flexibility of use of the electronic device.

[0064] The touch display module 10 is used to realize touch and display functions. The touch display module 10 may include a display panel, which may be a liquid crystal display panel (LCD), an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display panel, a flexible light-emitting diode (FLED) display panel, a Miniled display panel, a MicroLed display panel, a Micro-oled display panel, a quantum dot light-emitting diode (QLED) display panel, etc.

[0065] It is understandable that the electronic device in the embodiments of the present application may also be a tablet computer (Pad), a laptop computer, a smart TV, a wearable device (such as a smart watch, a smart bracelet, etc.), an e-book reader, a personal computer (PC), a personal digital assistant (PDA), a vehicle-mounted device, a financial device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and other electronic products with touch and display functions. The embodiments of the present application do not limit the specific technology and specific device form used by the electronic device.

[0066] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be implemented independently or in combination with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0067] For example, Figure 3 A cross-sectional schematic diagram of a first touch display module in which the anti-peeping layer is located above the touch layer provided in an embodiment of the present application, Figure 4 for Figure 3 A top view schematic diagram of the anti-peeping layer in the touch display module shown in FIG. Figure 3 As shown, the touch display module 10 includes: a display panel 110 , a touch layer 120 , an anti-peeping layer 130 and a cover plate 140 .

[0068] In some embodiments, the display panel 110 may be an OLED display panel. In this case, the display panel 110 may include film layers such as a substrate, a driving circuit layer, an anode layer, a pixel defining layer, a light emitting layer, a cathode layer, and an encapsulation layer.

[0069] Among them, the substrate substrate can be a rigid substrate substrate, such as a glass substrate; or, the substrate substrate can also be a flexible substrate substrate, such as a polyimide (PI) substrate or a polyethylene terephthalate (PET) substrate.

[0070] The driving circuit layer is disposed on the base substrate. Specifically, the driving circuit layer may include a pixel driving circuit corresponding to each sub-pixel, which is used to drive the corresponding sub-pixel to emit light.

[0071] The anode layer is arranged on the side of the driving circuit layer away from the substrate. The material of the anode layer may be a conductive material with high reflectivity, such as a metal material or alloy material such as aluminum, silver, copper, titanium, etc.

[0072] The pixel definition layer is disposed on the side of the driving circuit layer away from the substrate. Specifically, the pixel definition layer can cover the driving circuit layer and part of the anode layer. The pixel definition layer has a plurality of pixel openings for defining sub-pixels, and each pixel opening can expose part of the anode layer.

[0073] The light-emitting layer is located in the pixel opening in the pixel defining layer, and the light-emitting layer can be formed in the pixel opening in the pixel defining layer by inkjet printing or evaporation. The light-emitting layer can include stacked layers such as a hole injection layer, a hole transport layer, an organic material layer, an electron transport layer, and an electron injection layer, or the light-emitting layer can only include an organic material layer, and the organic material layer can use an organic electroluminescent material.

[0074] The cathode layer covers the pixel defining layer and the light emitting layer. The material of the cathode layer may be a conductive material with high transmittance, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0075] The encapsulation layer is located on the side of the cathode layer away from the substrate. The encapsulation layer may include a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer which are stacked, and the first inorganic encapsulation layer, the organic encapsulation layer and the second inorganic encapsulation layer are sequentially arranged away from the cathode layer. The material of the first inorganic encapsulation layer may be silicon nitride, silicon oxide or silicon oxynitride, etc., which may be formed by a deposition process, and the deposition process may be a chemical vapor deposition (CVD) process. The material of the organic encapsulation layer may be one or more combinations of aliphatic polyester, aliphatic polyurethane, aromatic polyurethane, polyimide resin, epoxy resin, siloxane resin and acrylic resin, which may be formed by an inkjet printing process. The material of the second inorganic encapsulation layer may be silicon nitride, silicon oxide or silicon oxynitride, etc., which may be formed by a deposition process, and the deposition process may be a CVD process.

[0076] It can be understood that the encapsulation layer in the embodiment of the present application is not limited to the encapsulation structure corresponding to the first inorganic encapsulation layer, the organic encapsulation layer and the second inorganic encapsulation layer stacked above, and it can also be other encapsulation structures, which is not limited in the embodiment of the present application.

[0077] In some other embodiments, the display panel 110 may be an LCD display panel. In this case, the display panel 110 may include a first polarizer, an array substrate, a liquid crystal layer, a color filter substrate, and a second polarizer stacked in sequence along the light emitting direction thereof.

[0078] The first polarizer is located at the light incident side of the display panel 110, that is, between the array substrate and the backlight module. The first polarizer is used to convert the light emitted by the backlight module into polarized light.

[0079] The array substrate and the color filter substrate are arranged in a box, and the liquid crystal layer is sandwiched between the array substrate and the color filter substrate. The array substrate includes a plurality of transistors and a pixel electrode connected to each transistor. The color filter substrate includes a common electrode, a color resist layer and a black matrix. The color resist layer includes a plurality of color resists distributed in an array, such as red color resist, blue color resist and green color resist, etc. A black matrix is ​​arranged between each two adjacent color resists.

[0080] The transistors in the array substrate are used to provide pixel voltages to the pixel electrodes connected thereto. A common voltage is applied to the common electrodes on the color filter substrate, thereby forming an electric field between the array substrate and the color filter substrate to control the deflection of the liquid crystal molecules in the liquid crystal layer. The polarization direction of the light passing through the liquid crystal molecules will change.

[0081] The second polarizer is located at the light-emitting side of the display panel 110, that is, at the side of the color film substrate away from the liquid crystal layer. The second polarizer is used to analyze the polarized light modulated by the liquid crystal molecules. For example, the light reaching the second polarizer with the same polarization direction as the second polarizer can pass through the second polarizer, so that the display panel 110 produces light and dark contrast to display an image.

[0082] like Figure 3 As shown, the touch layer 120 is located on the light-emitting side of the display panel 110. Specifically, when the display panel 110 is an OLED display panel, the touch layer 120 is actually located on the side of the encapsulation layer away from the base substrate; when the display panel 110 is an LCD display panel, the touch layer 120 is actually located on the side of the second polarizer away from the array substrate. The touch layer 120 is used to detect the user's touch position.

[0083] like Figure 3 As shown, the privacy protection layer 130 is located on a side of the touch layer 120 away from the display panel 110. The privacy protection layer 130 includes a dimming film layer 131 and a first electrode layer 132, which are sequentially stacked in the thickness direction of the display panel 110.

[0084] In some embodiments, the dimming film layer 131 includes a polymer dispersed liquid crystal layer or an electrochromic layer.

[0085] When the dimming film layer 131 includes a polymer dispersed liquid crystal layer, the material of the polymer dispersed liquid crystal layer includes polymer dispersed liquid crystal (PDLC), wherein the polymer dispersed liquid crystal may include positive polymer dispersed liquid crystal and negative polymer dispersed liquid crystal.

[0086] Take the case where the polymer dispersed liquid crystal layer is a negative polymer dispersed liquid crystal. When the voltage difference applied to the polymer dispersed liquid crystal layer is greater than a first preset value, the polymer dispersed liquid crystal layer is in a scattering state, which can also be called a foggy state; when the voltage difference applied to the polymer dispersed liquid crystal layer is less than a second preset value, the polymer dispersed liquid crystal layer is in a transparent state. The first preset value and the second preset value may be equal or unequal.

[0087] Taking the polymer dispersed liquid crystal layer as a positive polymer dispersed liquid crystal as an example, when the voltage difference applied to the polymer dispersed liquid crystal layer is greater than a first preset value, the polymer dispersed liquid crystal layer is in a transparent state; when the voltage difference applied to the polymer dispersed liquid crystal layer is less than a second preset value, the polymer dispersed liquid crystal layer is in a scattering state.

[0088] It should be understood that when the polymer dispersed liquid crystal layer is in a scattering state, it means that the dimming film layer 131 is in a shading state. When the dimming film layer 131 is in a shading state, the touch display module 10 is in an anti-peeping mode; when the polymer dispersed liquid crystal layer is in a transparent state, it means that the dimming film layer 131 is in a light-transmitting state. When the dimming film layer 131 is in a light-transmitting state, the touch display module 10 is in a non-peeping mode, which can also be called a sharing mode.

[0089] It should be noted that, since the polymer dispersed liquid crystal layer is not easy to be patterned, the embodiment of the present application can pattern the electrodes that apply voltage to the polymer dispersed liquid crystal layer. Taking the example of setting patterned electrodes on both sides of the polymer dispersed liquid crystal layer in the thickness direction, when the polymer dispersed liquid crystal layer is in a scattering state, it is actually that the polymer dispersed liquid crystal between the patterned electrodes on both sides is in a scattering state, and the polymer dispersed liquid crystal at the remaining positions can be in a transparent state. In this case, the polymer dispersed liquid crystal between the patterned electrodes on both sides can scatter the light emitted by the display panel 110, and the polymer dispersed liquid crystal at the remaining positions can transmit the light emitted by the display panel 110, so that the user within the viewing angle range sees a transparent state picture (that is, the information displayed by the touch display module 10 can be clearly seen), and the viewer outside the viewing angle range sees a fogged picture (that is, the information displayed by the touch display module 10 cannot be clearly seen). At this time, the touch display module 10 is in an anti-peeping mode to achieve anti-peeping display. When the polymer dispersed liquid crystal layer is in a transparent state, in fact, the polymer dispersed liquid crystal between the patterned electrodes on both sides and the polymer dispersed liquid crystal at other positions are all in a transparent state. In this case, the polymer dispersed liquid crystal between the patterned electrodes on both sides and the polymer dispersed liquid crystal at other positions can transmit the light emitted by the display panel 110. At this time, the touch display module 10 is in a non-peeping mode to achieve normal display.

[0090] In this way, by adjusting the voltage difference applied to the polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer can be switched between the scattering state and the transparent state, so that the touch display module 10 can be switched between the anti-peeping mode and the non-anti-peeping mode.

[0091] In the case where the dimming film layer 131 includes an electrochromic (EC) layer, the material of the EC layer includes an electrochromic material.

[0092] Electrochromism refers to the phenomenon that the optical properties of a material (such as reflectivity, transmittance, absorptivity, etc.) undergo stable and reversible color changes under the action of an external electric field, which is manifested in the reversible changes of color and transmittance. Materials with electrochromic properties are called electrochromic materials.

[0093] The electrochromic material may include an inorganic metal oxide. For example, the electrochromic material may be tungsten oxide (WO3), niobium oxide (Nb2O5), titanium oxide (TiO2), molybdenum oxide (MoO3), iridium oxide (IrO2), copper oxide (CuO), chromium oxide (Cr2O3), manganese oxide (Mn2O3), vanadium oxide (V2O5), cobalt oxide (Co2O3) and nickel oxide (Ni2O3), etc. It may also be a mixture of the above-mentioned various inorganic metal oxides doped with lithium, sodium, potassium, vanadium or titanium, or a mixture of various inorganic metal oxides doped with lithium, sodium, potassium, vanadium or titanium. The above-mentioned inorganic metal oxides have a good electrochromic effect, and the electrochromic color of the electrochromic layer can be controlled by selecting different inorganic metal oxides.

[0094] The electrochromic material may also include an organic electrochromic material. For example, the electrochromic material may be one or more of polythiophene and its derivatives, viologens, tetrathiafulvalene, metal phthalocyanine compounds, and the like.

[0095] When the voltage difference applied to the electrochromic layer is greater than the third preset value, the color of the electrochromic material in the electrochromic layer changes from a transparent state to a darker state, for example, from a transparent state to a darker state such as dark blue, gray or black. When the voltage difference applied to the electrochromic layer is less than the fourth preset value, the color of the electrochromic material in the electrochromic layer presents a transparent state. The third preset value and the fourth preset value may be equal or unequal.

[0096] It should be understood that when the electrochromic layer is in a darkened state (i.e., opaque state), it means that the dimming film layer 131 is in a light-shielding state. When the dimming film layer 131 is in a light-shielding state, the touch display module 10 is in an anti-peeping mode; when the electrochromic layer is in a transparent state, it means that the dimming film layer 131 is in a light-transmitting state. When the dimming film layer 131 is in a light-transmitting state, the touch display module 10 is in a non-peeping mode.

[0097] In this way, by adjusting the voltage difference applied to the electrochromic layer, the electrochromic layer can be switched between an opaque state and a transparent state, thereby switching the touch display module between an anti-peeping mode and a non-anti-peeping mode.

[0098] In a possible implementation, the dimming film layer 131 includes an electrochromic layer. Figure 4 As shown, the electrochromic layer includes a plurality of electrochromic portions 1311 extending along a third direction, each electrochromic portion 1311 is distributed in a strip shape, and there is a gap between two adjacent electrochromic portions 1311. For example, the third direction may be Figure 4 Y direction shown,

[0099] In this way, when the dimming film layer 131 includes an electrochromic layer, the electrochromic layer is patterned so that the electrochromic layer includes a plurality of electrochromic portions 1311 disposed at intervals.

[0100] Therefore, when the electrochromic layer is in an opaque state, it is actually the electrochromic portion 1311 in the electrochromic layer that is in an opaque state, and the gap between two adjacent electrochromic portions 1311 can transmit light normally, so that the electrochromic layer appears as follows: Figure 4 In this case, when the light emitted by the display panel 110 enters the electrochromic layer, the light with a large viewing angle will be blocked by the electrochromic portion 1311, and only the light with a small viewing angle can pass through and exit normally, thereby reducing the viewing angle range of the touch display module 10, so that viewers outside the viewing angle range cannot see the display screen. At this time, the touch display module 10 is in an anti-peeping mode to achieve anti-peeping display.

[0101] When the electrochromic layer is transparent, it is actually the electrochromic portion 1311 in the electrochromic layer that is transparent, and the electrochromic portion 1311 can normally transmit light, and the gap between two adjacent electrochromic portions 1311 can also normally transmit light. In this case, when the light emitted by the display panel 110 enters the electrochromic layer, the light is not blocked by the electrochromic layer, and the touch display module 10 is in a non-peeping mode to achieve normal display.

[0102] Of course, in another possible implementation, when the dimming film layer 131 includes an electrochromic layer, the electrochromic layer may not be patterned. Alternatively, when the dimming film layer 131 includes a polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer may not be patterned.

[0103] like Figure 4 As shown, the first electrode layer 132 includes a plurality of first electrodes 1321 extending along a first direction, each first electrode 1321 is a strip electrode, and there is a gap between two adjacent first electrodes 1321. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state at least under the action of the voltage applied by the plurality of first electrodes 1321. When the dimming film layer 131 presents a light-transmitting state, the touch display module 10 is in a non-peeping mode; when the dimming film layer 131 presents a light-shielding state, the touch display module 10 is in a peeping mode.

[0104] The first direction intersects with the third direction. The first direction can be Figure 4 The X direction is shown, and the third direction can be Figure 4 In some embodiments, the third direction is perpendicular to the first direction.

[0105] In one case, the first direction may be the row direction of the display panel 110, that is, the first electrode layer 132 includes a plurality of first electrodes 1321 extending along the row direction of the display panel 110; the third direction may be the column direction of the display panel 110, that is, the electrochromic layer includes a plurality of electrochromic portions 1311 extending along the column direction of the display panel 110. In this case, left and right peeping protection of the touch display module 10 can be achieved.

[0106] In another case, the first direction may be the column direction of the display panel 110, that is, the first electrode layer 132 includes a plurality of first electrodes 1321 extending along the column direction of the display panel 110; the third direction may be the row direction of the display panel 110, that is, the electrochromic layer includes a plurality of electrochromic portions 1311 extending along the row direction of the display panel 110. In this case, top and bottom peeping protection of the touch display module 10 can be achieved.

[0107] In the embodiment of the present application, an anti-peeping layer 130 is provided on a side of the touch layer 120 away from the display panel 110, so that the touch display module 10 can realize an anti-peeping function; and, since the first electrode layer 132 in the anti-peeping layer 130 includes a plurality of first electrodes 1321 extending along a first direction, and there is a gap between two adjacent first electrodes 1321, the first electrode layer 132 is graphed to reduce the shielding effect of the first electrode layer 132 on the touch electrodes in the touch layer 120, so that the touch display module 10 can normally realize the touch function.

[0108] It should be noted that the extension direction of the first electrode 1321 is the first direction, the extension direction of the electrochromic portion 1311 is the third direction, and the third direction intersects with the first direction. In other words, the extension direction of the first electrode 1321 is inconsistent with the extension direction of the electrochromic portion 1311. If the extension direction of the first electrode 1321 is consistent with the extension direction of the electrochromic portion 1311 (that is, the extension directions of the two are parallel to each other), then when the voltage difference applied to the electrochromic layer is greater than the third preset value, it is possible that the electrochromic material between the two adjacent first electrodes 1321 will not change from a transparent state to an opaque state, thereby affecting the anti-peeping effect of the touch display module 10. Therefore, in the embodiment of the present application, the extension direction of the first electrode 1321 is set to intersect with the extension direction of the electrochromic portion 1311, so as to improve the color change effect of the electrochromic material between the two adjacent first electrodes 1321, thereby improving the anti-peeping effect of the touch display module 10.

[0109] In some embodiments, the material of the first electrode 1321 is a transparent conductive material; or, the first electrode 1321 includes a plurality of metal grids.

[0110] In one case, the first electrode 1321 may be formed of a transparent conductive material, and the transparent conductive material may be ITO, IZO or other materials.

[0111] In another case, the first electrode 1321 may include a plurality of metal grids, which may be formed by a plurality of metal wires intersecting each other. Since the metal grids are normally transparent, they do not affect the display effect of the touch display module 10 in the anti-peeping mode and the non-anti-peeping mode.

[0112] The material of the metal grid may include a metal element or a metal alloy, for example, the metal material may be silver (Ag), copper (Cu), aluminum (Al) or aluminum-niobium alloy (AlNb), etc. The shape of the metal grid may be a rectangle, a diamond, a triangle, a pentagon, a hexagon or a circle, etc., which is not limited in the embodiments of the present application.

[0113] In one possible implementation, Figure 4 As shown, the first electrode layer 132 further includes a plurality of first virtual electrodes 1322, which are disposed in the same layer as the first electrodes 1321, and each first virtual electrode 1322 is located in a gap between two adjacent first electrodes 1321. The first virtual electrode 1322 may also be referred to as a first dummy electrode.

[0114] By disposing the first dummy electrode 1322 and the first electrode 1321 in the same layer, the thickness of the anti-peeping layer 130 can be reduced, thereby reducing the thickness of the touch display module 10 .

[0115] Since each first virtual electrode 1322 is located in the gap between two adjacent first electrodes 1321 , the orthographic projection of the first virtual electrode 1322 on the display panel 110 does not overlap with the orthographic projection of the first electrode 1321 on the display panel 110 .

[0116] The transmittance of the first virtual electrode 1322 is the same as the transmittance of the first electrode 1321. In some embodiments, the material of the first virtual electrode 1322 and the material of the first electrode 1321 may be the same, so that the transmittance of the first virtual electrode 1322 is the same as the transmittance of the first electrode 1321. For example, the first virtual electrode 1322 and the first electrode 1321 are both made of transparent conductive materials such as ITO or IZO.

[0117] Take the case where both the first virtual electrode 1322 and the first electrode 1321 are made of ITO. Since the transmittance of ITO is generally about 90%, if the first virtual electrode 1322 is not provided in the gap between two adjacent first electrodes 1321, when the dimming film layer 131 is in a light-transmitting state, the transmittance at the position of the first electrode 1321 is different from the transmittance at the gap between the two adjacent first electrodes 1321. Therefore, in the embodiment of the present application, a first virtual electrode 1322 is set in the gap between two adjacent first electrodes 1321, and the transmittance of the first virtual electrode 1322 is the same as the transmittance of the first electrode 1321. In this way, when the dimming film layer 131 is in a light-transmitting state, the transmittance at the position of the first electrode 1321 tends to be consistent with the transmittance at the position of the first virtual electrode 1322, so as to reduce the brightness difference between the touch display module 10 at the position of the first electrode 1321 and the gap between the two adjacent first electrodes 1321, thereby improving the visual effect of the touch display module 10.

[0118] It should be understood that Figure 4 It is shown that two rows of first virtual electrodes 1322 are arranged in the gap between two adjacent first electrodes 1321. In actual products, the number of rows of first virtual electrodes 1322 can be set according to actual conditions, and this embodiment of the present application does not limit this. In addition, the orthographic projection shape of the first virtual electrode 1322 on the display panel 110 can be as follows: Figure 4 The rectangle shown may also be a rhombus, triangle, pentagon, hexagon or circle, etc., which is not limited in the present embodiment. In addition, the first virtual electrode 1322 and the first electrode 1321 may be formed by the same patterning process to simplify the manufacturing process of the first virtual electrode 1322 and the first electrode 1321 and reduce the process complexity.

[0119] It should be noted that when the touch display module 10 is working, no signal is applied to the first virtual electrode 1322. The first virtual electrode 1322 is set in the gap between two adjacent first electrodes 1321. The main purpose of reducing the brightness difference between the touch display module 10 at the position of the first electrode 1321 and the gap between the two adjacent first electrodes 1321.

[0120] In addition, if Figure 3 As shown, the cover plate 140 is located on the side of the privacy layer 130 away from the display panel 110. Specifically, the cover plate 140 is located on the side of the first electrode layer 132 away from the display panel 110. In some embodiments, the cover plate 140 may be a glass cover plate, which is used to protect the privacy layer 130, the touch layer 120, the display panel 110 and other structures located thereunder.

[0121] It is understandable that along Figure 4 The cross-sectional view obtained by the section AA' shown can be Figure 3 The touch display module 10 is shown.

[0122] For example, Figure 5 A cross-sectional schematic diagram of a second touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located above the touch layer. Figure 5 As shown, the touch display module 10 includes: a display panel 110 , a touch layer 120 , a polarizer 150 , a first adhesive layer 160 , an anti-peep layer 130 , a second adhesive layer 170 and a cover plate 140 .

[0123] The touch layer 120 is located at the light-emitting side of the display panel 110. The touch layer 120 may include a first touch electrode layer 121, a third insulating layer 122, and a second touch electrode layer 123, which are arranged away from the display panel 110 in sequence along the thickness direction of the display panel 110.

[0124] like Figure 5 As shown, the polarizer 150 and the first adhesive layer 160 are located between the touch layer 120 and the anti-peep layer 130, and the first adhesive layer 160 is located on the side of the polarizer 150 away from the display panel 110. The polarizer 150 is used to block the reflection of external light to improve the contrast of the touch display module 10. The first adhesive layer 160 can be an optically clear adhesive (OCA) layer.

[0125] like Figure 5As shown, the anti-peeping layer 130 may include a first substrate 133, a dimming film layer 131, a first electrode layer 132, and a second substrate 134. The first substrate 133, the dimming film layer 131, the first electrode layer 132, and the second substrate 134 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110, and the first substrate 133 is located on a side of the dimming film layer 131 away from the first electrode layer 132, and the second substrate 134 is located on a side of the first electrode layer 132 away from the dimming film layer 131.

[0126] like Figure 5 As shown, the second adhesive layer 170 is located on the side of the anti-peep layer 130 away from the display panel 110. Specifically, the second adhesive layer 170 is located on the side of the second substrate 134 away from the display panel 110. The second adhesive layer 170 may be an OCA layer. The cover plate 140 is located on the side of the second adhesive layer 170 away from the display panel 110.

[0127] For example, Figure 6 This is a cross-sectional schematic diagram of a third touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located above the touch layer. Figure 6 As shown, the touch display module 10 includes: a display panel 110 , a third adhesive layer 180 , a touch layer 120 , a polarizer 150 , a first adhesive layer 160 , an anti-peep layer 130 , a second adhesive layer 170 and a cover plate 140 .

[0128] The third adhesive layer 180 is located between the display panel 110 and the touch layer 120, and is used to adhere the touch layer 120 to the light-emitting side of the display panel 110. The third adhesive layer 180 may be an OCA layer.

[0129] like Figure 6 As shown, the touch layer 120 is located on a side of the third adhesive layer 180 away from the display panel 110. The touch layer 120 includes a third substrate 124, a first touch electrode layer 121, a third insulating layer 122, and a second touch electrode layer 123. The third substrate 124, the first touch electrode layer 121, the third insulating layer 122, and the second touch electrode layer 123 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110.

[0130] like Figure 6 As shown, the polarizer 150 and the first adhesive layer 160 are located between the touch layer 120 and the privacy protection layer 130 , and the first adhesive layer 160 is located on a side of the polarizer 150 away from the display panel 110 .

[0131] like Figure 6As shown, the anti-peeping layer 130 may include a first substrate 133, a dimming film layer 131, a first electrode layer 132, and a second substrate 134. The first substrate 133, the dimming film layer 131, the first electrode layer 132, and the second substrate 134 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110, and the first substrate 133 is located on a side of the dimming film layer 131 away from the first electrode layer 132, and the second substrate 134 is located on a side of the first electrode layer 132 away from the dimming film layer 131.

[0132] like Figure 6 As shown, the second adhesive layer 170 is located on a side of the anti-peeping layer 130 away from the display panel 110 . The cover plate 140 is located on a side of the second adhesive layer 170 away from the display panel 110 .

[0133] It should be noted that Figure 5 The touch display module 10 shown in FIG. Figure 6 The difference between the touch display module 10 shown is: Figure 5 The touch layer 120 in the touch display module 10 shown can be directly manufactured on the light emitting surface of the display panel 110. Figure 6 The touch layer 120 in the touch display module 10 shown is manufactured separately and is bonded to the light emitting surface of the display panel 110 through the third bonding layer 180 .

[0134] It is understandable that along Figure 4 The cross-sectional view obtained by the section AA' shown can be Figure 5 or Figure 6 The touch display module 10 is shown.

[0135] For example, Figure 7 A cross-sectional schematic diagram of a fourth touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located above the touch layer. Figure 8 for Figure 7 A top view schematic diagram of the anti-peeping layer in the touch display module shown in FIG. Figure 7 As shown, the touch display module 10 includes: a display panel 110 , a touch layer 120 , a polarizer 150 , a first adhesive layer 160 , an anti-peep layer 130 , a second adhesive layer 170 and a cover plate 140 .

[0136] The touch layer 120 is located at the light-emitting side of the display panel 110. The touch layer 120 may include a first touch electrode layer 121, a third insulating layer 122, and a second touch electrode layer 123, which are arranged away from the display panel 110 in sequence along the thickness direction of the display panel 110.

[0137] like Figure 7As shown, the polarizer 150 and the first adhesive layer 160 are located between the touch layer 120 and the privacy layer 130, and the first adhesive layer 160 is located on the side of the polarizer 150 away from the display panel 110. The second adhesive layer 170 is located on the side of the privacy layer 130 away from the display panel 110. The cover plate 140 is located on the side of the second adhesive layer 170 away from the display panel 110.

[0138] like Figure 7 As shown, the privacy protection layer 130 may include a first substrate 133, a dimming film layer 131, a first electrode control layer, a first electrode layer 132, and a second substrate 134. The first electrode control layer and the first electrode layer 132 are both located on the same side of the dimming film layer 131. For example, the first electrode control layer and the first electrode layer 132 are both located on a side of the dimming film layer 131 away from the display panel 110.

[0139] like Figure 7 and Figure 8 As shown, the first electrode control layer includes a second electrode layer 135 , a plurality of third electrodes 136 and a plurality of switch tubes 137 .

[0140] The first electrode layer 132 includes a plurality of first electrodes 1321 extending along a first direction, each first electrode 1321 is a strip electrode, and a gap exists between two adjacent first electrodes 1321. The second electrode layer 135 includes a plurality of second electrodes 1351 extending along a second direction, each second electrode 1351 is a strip electrode, and a gap exists between two adjacent second electrodes 1351; the second direction intersects with the first direction.

[0141] For example, the first direction can be Figure 8 The X direction shown, the second direction can be Figure 8 Specifically, the second direction may be perpendicular to the first direction. In some embodiments, the dimming film layer 131 includes an electrochromic layer, and the electrochromic layer includes a plurality of electrochromic portions 1311 extending along a third direction. The third direction may be parallel to the second direction, that is, the third direction may also be Figure 8 Y direction shown.

[0142] like Figure 8 As shown, each third electrode 136 is located in a region defined by the intersection of a plurality of first electrodes 1321 and a plurality of second electrodes 1351. That is, each third electrode 136 is distributed between two adjacent second electrodes 1351 in the first direction, and each third electrode 136 is distributed between two adjacent first electrodes 1321 in the second direction.

[0143] like Figure 8As shown, the switch tubes 137 are arranged in one-to-one correspondence with the third electrodes 136, and the gate of each switch tube 137 is connected to the second electrode 1351, the first electrode of each switch tube 137 is connected to the first electrode 1321, and the second electrode of each switch tube 137 is connected to the third electrode 136. In addition, each switch tube 137 is used to be disconnected in the touch stage to control the third electrode 136 connected thereto to be in a suspended state, which can also be called a floating state.

[0144] The touch display module 10 can work alternately in the display stage and the touch stage. When the touch display module 10 works in the display stage, it is used to drive the display panel 110 to display images. When the touch display module 10 works in the touch stage, it is used to control the touch layer 120 to perform touch detection.

[0145] In the embodiment of the present application, when the touch display module 10 is working in the touch stage, the switch tube 137 can be controlled to be disconnected by controlling the voltage signal applied to the second electrode 1351, so that the third electrode 136 connected to the disconnected switch tube 137 is in a suspended state, so as to reduce the shielding effect of the third electrode 136 on the touch electrode in the touch layer 120.

[0146] When the touch display module 10 is working in the display stage, the switch tube 137 can be controlled to be turned on by controlling the voltage signal applied to the second electrode 1351. Then, the voltage signal applied to the first electrode 1321 can be written to the third electrode 136 through the turned-on switch tube 137, so that the third electrode 136 can also control the dimming film layer 131 to present a light-transmitting state or a light-shielding state, so as to further improve the anti-peeping effect of the touch display module 10.

[0147] In some embodiments, Figure 8 As shown, a plurality of switch tubes 137 located in the same row in the second direction are connected to the same second electrode 1351, and a plurality of switch tubes 137 located in the same row in the first direction are connected to the same first electrode 1321. For example, the first direction may be the row direction of the display panel 110, and the second direction may be the column direction of the display panel 110, so that a plurality of switch tubes 137 located in the same column are connected to the same second electrode 1351, and a plurality of switch tubes 137 located in the same row are connected to the same first electrode 1321.

[0148] In some embodiments, each third electrode 136 is disposed in the same layer as the first electrode 1321, and the orthographic projection of each third electrode 136 on the display panel 110 does not overlap with the orthographic projection of the first electrode 1321 on the display panel 110. By disposing the third electrode 136 and the first electrode 1321 in the same layer, the thickness of the anti-peeping layer 130 can be reduced, thereby reducing the thickness of the touch display module 10.

[0149] The third electrode 136 and the first electrode 1321 can be manufactured by the same patterning process to simplify the manufacturing process of the third electrode 136 and the first electrode 1321 and reduce the process complexity. In addition, the material of the third electrode 136 can be the same as that of the first electrode 1321. In addition, the orthographic projection shape of the third electrode 136 on the display panel 110 can be as follows: Figure 8 The rectangle shown may also be a rhombus, a triangle, a pentagon, a hexagon or a circle, etc., which is not limited in the embodiments of the present application.

[0150] In some embodiments, the second electrode layer 135 and the first electrode layer 132 are arranged in different layers, an insulating layer is arranged between the second electrode layer 135 and the first electrode layer 132 , and the first electrode layer 132 is located on a side of the second electrode layer 135 close to the dimming film layer 131 .

[0151] Since the voltage signal applied to the second electrode 1351 is used to control the switch tube 137 to be turned on or off, and the voltage signal applied to the first electrode 1321 is used to control the dimming film layer 131 to present a light-transmitting state or a light-shielding state. Therefore, in order to reduce the mutual influence between the voltage signal applied to the second electrode 1351 and the voltage signal applied to the first electrode 1321, the second electrode layer 135 and the first electrode layer 132 are arranged in different layers, and an insulating layer is arranged between the second electrode layer 135 and the first electrode layer 132.

[0152] Furthermore, by disposing the first electrode layer 132 on the side of the second electrode layer 135 close to the dimming film layer 131, the first electrode layer 132 is closer to the dimming film layer 131, so that the voltage signal applied to the first electrode 1321 can control the dimming film layer 131 to present a light-transmitting state or a light-shielding state, thereby improving the control effect of the voltage signal applied to the first electrode 1321 on the dimming film layer 131.

[0153] It should be noted that Figure 8 The switch tube 137 shown is represented by a circuit symbol of a transistor, which does not represent the actual layout structure of the switch tube 137 in the anti-peeping layer 130 . In fact, the switch tube 137 can be manufactured by a plurality of film layer structures.

[0154] For example, Figure 7 As shown, each switch tube 137 includes an active layer 1371, a gate 1372, a first electrode 1373, and a second electrode 1374; a first insulating layer 1375 is provided between the active layer 1371 and the gate 1372, and a second insulating layer 1376 is provided between the gate 1372 and the first electrode 1373 and the second electrode 1374. One of the first electrode 1373 and the second electrode 1374 can be a source electrode, and the other can be a drain electrode, which depends on the actual product.

[0155] Specifically, the active layer 1371 is located on a side of the second substrate 134 close to the display panel 110; the first insulating layer 1375 covers the active layer 1371 and a portion of the second substrate 134; the gate electrode 1372 is located on a side of the first insulating layer 1375 close to the display panel 110; the second insulating layer 1376 covers the gate electrode 1372 and a portion of the first insulating layer 1375. The first electrode 1373 and the second electrode 1374 are located on a side of the second insulating layer 1376 close to the display panel 110, and the first electrode 1373 and the second electrode 1374 are connected to the active layer 1371 through via holes penetrating the second insulating layer 1376 and the first insulating layer 1375, respectively.

[0156] The gate 1372 and the second electrode 1351 are disposed in the same layer to reduce the thickness of the touch display module 10. In addition, the gate 1372 and the second electrode 1351 can be manufactured using the same patterning process to simplify the manufacturing process of the gate 1372 and the second electrode 1351 and reduce the process complexity.

[0157] The first electrode 1373 and the second electrode 1374 are both disposed in the same layer as the first electrode 1321 to reduce the thickness of the touch display module 10. In addition, the first electrode 1373, the second electrode 1374 and the first electrode 1321 can be manufactured using the same patterning process to simplify the manufacturing process of the first electrode 1373, the second electrode 1374 and the first electrode 1321 and reduce the process complexity.

[0158] When the gate 1372 is disposed on the same layer as the second electrode 1351 , and the first electrode 1373 and the second electrode 1374 are disposed on the same layer as the first electrode 1321 , the insulating layer between the second electrode layer 135 and the first electrode layer 132 is the second insulating layer 1376 .

[0159] Of course, in other embodiments, the gate 1372 and the second electrode 1351 may also be arranged in different layers, and at least two of the first electrode 1373, the second electrode 1374, the first electrode 1321 and the third electrode 136 may also be arranged in different layers.

[0160] It is understandable that along Figure 8 The cross-sectional view obtained by the cross-sectional view BB' shown in FIG. Figure 7 The touch display module 10 shown. In addition, the specific film structure of the switch tube 137 in the touch display module 10 includes but is not limited to Figure 7 The film structure of the switch tube 137 is shown.

[0161] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7As shown in the touch display module 10, it can be seen that the first electrode layer 132 is located on the side of the dimming film layer 131 away from the display panel 110. Of course, the first electrode layer 132 can also be located on the side of the dimming film layer 131 close to the display panel 110.

[0162] Therefore, the anti-peep layer 130 included in the touch display module 10 in the embodiment of the present application can set the first electrode layer 132 on one side of the dimming film layer 131, and control the dimming film layer 131 to be in a light-transmitting state or a light-shielding state through the parallel electric field between the multiple first electrodes 1321 in the first electrode layer 132.

[0163] Specifically, the plurality of first electrodes 1321 are divided into a plurality of first electrode groups, and each first electrode group includes two adjacent first electrodes 1321. The dimming film layer 131 is specifically used for presenting a light-shielding state when the first voltage signal and the second voltage signal are applied to the two adjacent first electrodes 1321 in each first electrode group, respectively; and presenting a light-transmitting state when the third voltage signal is applied to the two adjacent first electrodes 1321 in each first electrode group or no voltage signal is applied to the two adjacent first electrodes 1321.

[0164] The first voltage signal, the second voltage signal and the third voltage signal are all DC voltage signals, and the voltage difference between the voltage of the first voltage signal and the voltage of the second voltage signal is greater than a first voltage threshold. The first voltage threshold can be set according to actual conditions.

[0165] When the touch display module 10 is in the anti-peep mode, a first voltage signal and a second voltage signal can be respectively applied to two adjacent first electrodes 1321 in each first electrode group, so that there is a voltage difference between two adjacent first electrodes 1321 in each first electrode group to form a parallel electric field, which can control the dimming film layer 131 to present a light-shielding state.

[0166] In one implementation, the voltage of the first voltage signal may be greater than 0V, the voltage of the second voltage signal may be less than 0V, and the value corresponding to the voltage of the first voltage signal and the value corresponding to the voltage of the second voltage signal are opposite to each other. For example, the first voltage signal may be a 1.5V DC voltage signal, and the second voltage signal may be a -1.5V DC voltage signal.

[0167] It should be noted that, when the touch display module 10 is in the anti-peeping mode, for any two adjacent first electrodes 1321 , a first voltage signal is applied to one of the first electrodes 1321 , and a second voltage signal is applied to the other first electrode 1321 .

[0168] When the touch display module 10 is in the non-peeping mode, the third voltage signal may be applied to both adjacent two first electrodes 1321 in each first electrode group, or no voltage signal may be applied to both adjacent two first electrodes 1321 in each first electrode group, so that there is no voltage difference between the adjacent two first electrodes 1321 in each first electrode group, thereby controlling the dimming film layer 131 to present a light-transmitting state. For example, the voltage of the third voltage signal may be 0V or 1.5V.

[0169] Therefore, in the embodiment of the present application, the first electrode layer 132 can be set on a single side of the dimming film layer 131, and the dimming film layer 131 can be controlled to present a light-transmitting state or a light-shielding state through the parallel electric field between the multiple first electrodes 1321 in the first electrode layer 132. This can reduce the thickness of the anti-peep layer 130, thereby reducing the thickness of the touch display module 10, and can reduce the process complexity of the touch display module 10.

[0170] In addition, for Figure 7 In the touch display module 10 shown, when the touch display module 10 is in the anti-peeping mode, in addition to applying the first voltage signal and the second voltage signal to the two adjacent first electrodes 1321 in each first electrode group, a voltage signal can also be applied to each second electrode 1351 to control the switch tube 137 to be turned on, and then the voltage signal applied to the first electrode 1321 can be written to the third electrode 136 through the turned-on switch tube 137, so that the voltage signal applied to the third electrodes 136 in the same row is the first voltage signal or the second voltage signal, and one of any two adjacent rows of third electrodes 136 is applied with the first voltage signal, and the other is applied with the second voltage signal. In this way, there is a voltage difference between the two adjacent first electrodes 1321 in each first electrode group to form a parallel electric field, and there is also a voltage difference between any two adjacent rows of third electrodes 136 to form a parallel electric field, so as to control the dimming film layer 131 to present a light shielding state.

[0171] against Figure 7 In the touch display module 10 shown, when the touch display module 10 is in the non-peeping mode, in addition to applying the third voltage signal to the two adjacent first electrodes 1321 in each first electrode group, a voltage signal can also be applied to each second electrode 1351 to control the switch tube 137 to be turned on, and the voltage signal applied to the first electrode 1321 can be written to the third electrode 136 through the turned-on switch tube 137 to apply the third voltage signal to each third electrode 136. In this way, there is no voltage difference between the two adjacent first electrodes 1321 in each first electrode group, and there is no voltage difference between each third electrode 136, so that the dimming film layer 131 is controlled to present a light-transmitting state.

[0172] For example, Fig. 9A cross-sectional schematic diagram of a fifth touch display module provided in an embodiment of the present application, wherein the anti-peeping layer is located above the touch layer. Fig. 9 As shown, the touch display module 10 includes: a display panel 110 , a touch layer 120 , a polarizer 150 , a first adhesive layer 160 , an anti-peep layer 130 , a second adhesive layer 170 and a cover plate 140 .

[0173] The anti-peeping layer 130 includes a first substrate 133, a third electrode layer 138, a dimming film layer 131, a first electrode layer 132, and a second substrate 134. The first substrate 133, the third electrode layer 138, the dimming film layer 131, the first electrode layer 132, and the second substrate 134 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110, that is, the first electrode layer 132 and the third electrode layer 138 are respectively located on both sides of the dimming film layer 131 in the thickness direction of the display panel 110.

[0174] In some embodiments, the third electrode layer 138 includes a plurality of fourth electrodes extending along the first direction, each fourth electrode is a strip electrode, and there is a gap between two adjacent fourth electrodes. The orthographic projection of each fourth electrode on the display panel 110 overlaps with the orthographic projection of the first electrode 1321 on the display panel 110.

[0175] In this way, by graphing the third electrode layer 138, the orthographic projection of each fourth electrode in the third electrode layer 138 on the display panel 110 overlaps with the orthographic projection of the first electrode 1321 on the display panel 110, so as to reduce the shielding effect of the third electrode layer 138 on the touch electrodes in the touch layer 120, so that the touch display module 10 can normally realize the touch function.

[0176] In one achievable method, the orthographic projection of each fourth electrode on the display panel 110 coincides with the orthographic projection of the first electrode 1321 on the display panel 110, that is, the distribution of each first electrode 1321 in the first electrode layer 132 is consistent with the distribution of each fourth electrode in the third electrode layer 138, so as to further reduce the shielding effect of the first electrode layer 132 and the third electrode layer 138 on the touch electrodes in the touch layer 120.

[0177] In some embodiments, the fourth electrode may be made of a transparent conductive material; or, the fourth electrode includes a plurality of metal grids.

[0178] Therefore, the anti-peep layer 130 included in the touch display module 10 in the embodiment of the present application can be provided with a first electrode layer 132 and a third electrode layer 138 on both sides of the dimming film layer 131. In one implementation, the dimming film layer 131 is controlled to present a light-transmitting state or a light-shielding state by a parallel electric field between a plurality of first electrodes 1321 in the first electrode layer 132 and a parallel electric field between a plurality of fourth electrodes in the third electrode layer 138. In another implementation, the dimming film layer 131 is controlled to present a light-transmitting state or a light-shielding state by a vertical electric field between a first electrode 1321 in the first electrode layer 132 and a fourth electrode in the third electrode layer 138.

[0179] In one implementation, when the dimming film layer 131 is controlled by a parallel electric field to present a light-transmitting state or a light-shielding state, the plurality of fourth electrodes are divided into a plurality of second electrode groups, and each second electrode group includes two adjacent fourth electrodes. The dimming film layer 131 is also used to present a light-shielding state when the first voltage signal and the second voltage signal are applied to the two adjacent fourth electrodes in each second electrode group, respectively; and present a light-transmitting state when the third voltage signal is applied to the two adjacent fourth electrodes in each second electrode group or no voltage signal is applied.

[0180] Among them, for the first electrode 1321 and the fourth electrode whose orthographic projections on the display panel 110 have overlapping areas, the voltages of the voltage signals applied thereto are the same; the first voltage signal, the second voltage signal and the third voltage signal are all DC voltage signals, and the voltage difference between the voltage of the first voltage signal and the voltage of the second voltage signal is greater than the first voltage threshold.

[0181] When the touch display module 10 is in the anti-peep mode, the first voltage signal and the second voltage signal can be respectively applied to two adjacent first electrodes 1321 in each first electrode group, so that a voltage difference exists between the two adjacent first electrodes 1321 in each first electrode group to form a parallel electric field; and the first voltage signal and the second voltage signal can be respectively applied to two adjacent fourth electrodes in each second electrode group, so that a voltage difference exists between the two adjacent fourth electrodes in each second electrode group to form a parallel electric field, thereby controlling the dimming film layer 131 to present a light-shielding state.

[0182] When the touch display module 10 is in non-peeping mode, a third voltage signal can be applied to two adjacent first electrodes 1321 in each first electrode group, or no voltage signal can be applied, so that there is no voltage difference between two adjacent first electrodes 1321 in each first electrode group; and a third voltage signal can be applied to two adjacent fourth electrodes in each second electrode group, or no voltage signal can be applied, so that there is no voltage difference between two adjacent fourth electrodes in each second electrode group, thereby controlling the dimming film layer 131 to be in a light-transmitting state.

[0183] In another implementation method, when the dimming film layer 131 is controlled by a vertical electric field to present a light-transmitting state or a light-shielding state, the dimming film layer 131 is specifically used to present a light-shielding state when a fourth voltage signal is applied to each first electrode 1321 and a fifth voltage signal is applied to each fourth electrode; and to present a light-transmitting state when a sixth voltage signal is applied to each first electrode 1321 and a seventh voltage signal is applied to each fourth electrode.

[0184] Among them, the fourth voltage signal, the fifth voltage signal, the sixth voltage signal and the seventh voltage signal are all DC voltage signals; the voltage difference between the voltage of the fourth voltage signal and the voltage of the fifth voltage signal is greater than the second voltage threshold, the voltage difference between the voltage of the sixth voltage signal and the voltage of the seventh voltage signal is less than the third voltage threshold, and the second voltage threshold is greater than or equal to the third voltage threshold. The second voltage threshold and the third voltage threshold can be set according to actual conditions.

[0185] When the touch display module 10 is in the anti-peep mode, a fourth voltage signal can be applied to each first electrode 1321 in the first electrode layer 132, and a fifth voltage signal can be applied to each fourth electrode in the third electrode layer 138, and the voltage difference between the voltage of the fourth voltage signal and the voltage of the fifth voltage signal is greater than the second voltage threshold, so that a vertical electric field is formed between each first electrode 1321 and its corresponding fourth electrode, thereby controlling the dimming film layer 131 to present a light-shielding state.

[0186] For example, the fourth voltage signal may be a 1.5V DC voltage signal, the fifth voltage signal may be a 0V DC voltage signal, and the voltage difference between the fourth voltage signal and the fifth voltage signal may be 1.5V.

[0187] When the touch display module 10 is in non-peeping mode, a sixth voltage signal can be applied to each first electrode 1321 in the first electrode layer 132, and a seventh voltage signal can be applied to each fourth electrode in the third electrode layer 138, and the voltage difference between the voltage of the sixth voltage signal and the voltage of the seventh voltage signal is less than the third voltage threshold, thereby controlling the dimming film layer 131 to be in a light-transmitting state.

[0188] For example, the sixth voltage signal may be a DC voltage signal of -1.5 V, and the seventh voltage signal may be a DC voltage signal of 0 V, and the voltage difference between the voltage of the sixth voltage signal and the voltage of the seventh voltage signal may be -1.5 V. Alternatively, the sixth voltage signal and the seventh voltage signal may both be DC voltage signals of 0 V, and the voltage difference between the voltage of the sixth voltage signal and the voltage of the seventh voltage signal may be 0 V.

[0189] In some embodiments, the third electrode layer 138 further includes a plurality of second virtual electrodes, which are disposed in the same layer as the fourth electrodes, and each second virtual electrode is located in a gap between two adjacent fourth electrodes. The second virtual electrodes may also be referred to as second dummy electrodes.

[0190] Since each second virtual electrode is located in the gap between two adjacent fourth electrodes, the orthographic projection of the second virtual electrode on the display panel 110 does not overlap with the orthographic projection of the fourth electrode on the display panel 110 .

[0191] Among them, the transmittance of the second virtual electrode is the same as the transmittance of the fourth electrode. In some embodiments, the material of the second virtual electrode and the material of the fourth electrode can be the same, so that the transmittance of the second virtual electrode is the same as the transmittance of the fourth electrode. In this way, by setting the second virtual electrode in the third electrode layer 138, when the dimming film layer 131 is in a light-transmitting state, the transmittance at the position of the fourth electrode tends to be consistent with the transmittance at the position of the second virtual electrode, so as to reduce the brightness difference of the touch display module 10 at the position of the fourth electrode and the gap between the two adjacent fourth electrodes, thereby improving the visual effect of the touch display module 10.

[0192] Further, the orthographic projection of each second virtual electrode on the display panel 110 overlaps with the orthographic projection of the first virtual electrode 1322 on the display panel 110. Specifically, the orthographic projection of each second virtual electrode on the display panel 110 overlaps with the orthographic projection of the first virtual electrode 1322 on the display panel 110.

[0193] In other embodiments, the anti-peeping layer 130 further includes a second electrode control layer, and the second electrode control layer and the third electrode layer 138 are both located on the same side of the dimming film layer 131. The layer structure included in the second electrode control layer is the same as the layer structure included in the first electrode control layer located on the other side of the dimming film layer 131, and is symmetrically arranged relative to the dimming film layer 131.

[0194] That is, the second electrode control layer also includes Figure 7 and Figure 8 The film structure of the second electrode layer 135 , the plurality of third electrodes 136 , the plurality of switch tubes 137 and the like will not be described in detail here.

[0195] When the touch display module 10 is operating in the touch stage, the plurality of switch tubes in the second electrode control layer may also be controlled to be in a suspended state to reduce the shielding effect on the touch electrodes in the touch layer 120 .

[0196] For example, Fig.10 The curve relationship diagram of the touch signal ratio and the distance between two adjacent first electrodes in the first electrode layer provided in the embodiment of the present application is shown in FIG. Fig.10 As shown, the horizontal axis represents the distance (i.e., pitch) between two adjacent first electrodes 1321, which is actually the sum of the distance of the gap between the two adjacent first electrodes 1321 and the width W of the first electrode 1321, and the unit is micrometer; the vertical axis represents the touch signal ratio, which is actually the ratio of the signal difference when the first electrode 1321 shields the touch electrode to the signal difference when the touch electrode is not shielded, and the signal difference is the difference between the signal between the touch sensing electrode and the touch driving electrode when the finger is not touching and the signal between the touch sensing electrode and the touch driving electrode when the finger is touching.

[0197] and, Fig.10 Taking the width W of the first electrode 1321 as 20 micrometers as an example, the corresponding relationship between the distance between two adjacent first electrodes 1321 and the ratio of the touch signal quantity is tested.

[0198] from Fig.10 It can be seen from the figure that when the distance between two adjacent first electrodes 1321 is greater than or equal to 1000 micrometers, the touch signal ratio is greater than 0.8, indicating that the shielding effect of the first electrode 1321 on the touch electrode has been reduced to a relatively low level.

[0199] Therefore, in the touch display module 10, the gap between two adjacent first electrodes 1321 can be set to be greater than or equal to 980 micrometers. In this way, by reasonably setting the gap between two adjacent first electrodes 1321, the shielding effect of the first electrode layer 132 on the touch electrode in the touch layer 120 can be reduced.

[0200] In the embodiment of the present application, the touch electrodes in the touch layer 120 may be mutual capacitance touch electrodes. The touch layer 120 includes a first touch electrode layer 121 , a third insulating layer 122 and a second touch electrode layer 123 .

[0201] One way to implement this is Fig.11 As shown, the first touch electrode layer 121 includes a plurality of first touch electrodes 1211 extending along the second direction, and the first touch electrodes 1211 are strip electrodes; the second touch electrode layer 123 includes a plurality of second touch electrodes 1231 extending along the first direction, and the second touch electrodes 1231 are strip electrodes. The first direction can be Fig.11 The X direction shown, the second direction can be Fig.11 In the Y direction shown, the first direction intersects the second direction.

[0202] One of the first touch electrode 1211 and the second touch electrode 1231 is a touch driving electrode, and the other is a touch sensing electrode.

[0203] Take the first touch electrode 1211 as a touch driving electrode and the second touch electrode 1231 as a touch sensing electrode as an example. A touch driving signal can be applied to each first touch electrode 1211 in sequence, and the touch position can be determined according to the sensing signals received by the plurality of second touch electrodes 1231. When a finger touches, part of the touch driving signal on the first touch electrode 1211 will be transmitted back to the ground through the finger, and the other part will be received by the second touch electrode 1231. Therefore, when a finger touches, the signal amount of the sensing signal received by the second touch electrode 1231 will be reduced, thereby realizing the detection of the touch position.

[0204] In some embodiments, the materials of the first touch electrode 1211 and the second touch electrode 1231 are transparent conductive materials; or, the first touch electrode 1211 and the second touch electrode 1231 both include a plurality of metal grids.

[0205] Another way to implement it is Fig.12 As shown, the first touch electrode layer 121 includes a plurality of bridging electrodes 1212; the second touch electrode layer 123 includes a third touch electrode and a fourth touch electrode arranged in the same layer. The third touch electrode includes a plurality of third touch sub-electrodes 1232 arranged at intervals, and any two third touch sub-electrodes 1232 along the first direction are electrically connected through the bridging electrode 1212; the fourth touch electrode includes a plurality of directly connected fourth touch sub-electrodes 1233, and the plurality of directly connected fourth touch sub-electrodes 1233 extend along the second direction.

[0206] The first direction can be Fig.12The X direction shown, the second direction can be Fig.12 In the Y direction shown, the first direction intersects the second direction. One of the third touch electrode and the fourth touch electrode is a touch driving electrode, and the other is a touch sensing electrode.

[0207] In some embodiments, the third touch electrode and the fourth touch electrode are made of transparent conductive material; or, the third touch electrode and the fourth touch electrode both include a plurality of metal grids.

[0208] In the embodiment of the present application, the touch electrodes in the touch layer 120 may also be self-capacitive touch electrodes, wherein the touch layer 120 only includes the first touch electrode layer 121 or the second touch electrode layer 123 .

[0209] For example, the touch layer 120 only includes the first touch electrode layer 121. Fig.13 As shown, the first touch electrode layer 121 includes a plurality of touch electrodes 1213 distributed in an array, each touch electrode 1213 forms a self-capacitance with the ground, and each touch electrode 1213 is used to receive a touch driving signal.

[0210] When a finger touches, a capacitor is formed between the finger and the touch electrode 1213. The capacitance between the finger and the touch electrode 1213 is superimposed on the self-capacitance formed by the touch electrode 1213 and the ground, making the self-capacitance larger, so that the touch position of the finger can be detected.

[0211] In some embodiments, the touch electrode 1213 may be a block electrode, and the material of the touch electrode 1213 may be a transparent conductive material.

[0212] Combined with the above Figures 3 to 13 , a touch display module 10 in which the anti-peeping layer 130 is located above the touch layer 120 provided in an embodiment of the present application is described. In some touch display modules 10, the electrodes in the anti-peeping layer 130 can also be reused as touch electrodes, or the anti-peeping layer 130 can also be located below the touch layer 120.

[0213] For example, Fig.14 A cross-sectional schematic diagram of a first touch display module in which electrodes in the anti-peep layer provided in an embodiment of the present application are reused as touch electrodes, Fig.15 for Fig.14 A top view schematic diagram of the anti-peeping layer in the touch display module shown in FIG. Fig.14 As shown, the touch display module 10 includes: a display panel 110 , an anti-peep layer 130 and a cover plate 140 .

[0214] The privacy protection layer 130 is located on the light-emitting side of the display panel 110. The privacy protection layer 130 includes a dimming film layer 131, a first electrode layer 132, and a third electrode layer 138. The third electrode layer 138, the dimming film layer 131, and the first electrode layer 132 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110, that is, the first electrode layer 132 and the third electrode layer 138 are respectively located on both sides of the dimming film layer 131 in the thickness direction of the display panel 110.

[0215] like Fig.15 As shown, the third electrode layer 138 includes a plurality of fifth electrodes 1381 extending along the second direction, each fifth electrode 1381 is a strip electrode, and a gap exists between two adjacent fifth electrodes 1381. The first electrode layer 132 includes a plurality of first electrodes 1321 extending along the first direction, each first electrode 1321 is a strip electrode, and a gap exists between two adjacent first electrodes 1321. The first direction intersects with the second direction.

[0216] The dimming film layer 131 includes an electrochromic layer, and the electrochromic layer includes a plurality of electrochromic portions 1311 extending along a third direction, and the third direction may be parallel to the second direction.

[0217] The first direction can be Fig.15 The X direction, the second direction and the third direction can be Fig.15 For example, the second direction and the third direction may be perpendicular to the first direction respectively.

[0218] In some embodiments, the dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the action of the voltage applied by the fifth electrode 1381 and the first electrode 1321. When the dimming film layer 131 presents a light-transmitting state, the touch display module 10 is in a non-peeping mode; when the dimming film layer 131 presents a light-shielding state, the touch display module 10 is in a peeping mode.

[0219] Furthermore, the fifth electrode 1381 and the first electrode 1321 are both multiplexed as touch electrodes. Specifically, one of the fifth electrode 1381 and the first electrode 1321 is multiplexed as a touch drive electrode, and the other is multiplexed as a touch sensing electrode. For example, the fifth electrode 1381 is multiplexed as a touch drive electrode, and the first electrode 1321 is multiplexed as a touch sensing electrode.

[0220] It is understandable that along Fig.15 The cross-sectional view obtained by the cross-sectional view C-C' shown in FIG. Fig.14 The touch display module 10 is shown.

[0221] For example, Fig.16A cross-sectional schematic diagram of a second touch display module in which the electrodes in the anti-peep layer provided in the embodiment of the present application are reused as touch electrodes. Fig.16 As shown, the touch display module 10 includes: a display panel 110 , a third adhesive layer 180 , an anti-peep layer 130 , a polarizer 150 , a second adhesive layer 170 and a cover plate 140 .

[0222] The third adhesive layer 180 is located between the display panel 110 and the anti-peeping layer 130 , and is used to adhere the anti-peeping layer 130 to the light emitting side of the display panel 110 .

[0223] like Fig.16 As shown, the anti-peep layer 130 includes a first substrate 133, a third electrode layer 138, a dimming film layer 131 and a first electrode layer 132. The first substrate 133, the third electrode layer 138, the dimming film layer 131 and the first electrode layer 132 are arranged in sequence away from the display panel 110 along the thickness direction of the display panel 110.

[0224] The third electrode layer 138 includes a plurality of fifth electrodes 1381 extending along the second direction, and the first electrode layer 132 includes a plurality of first electrodes 1321 extending along the first direction. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the fifth electrode 1381 and the first electrode 1321. In addition, one of the fifth electrode 1381 and the first electrode 1321 is multiplexed as a touch driving electrode, and the other is multiplexed as a touch sensing electrode.

[0225] like Fig.16 As shown, the polarizer 150 is located on the side of the anti-peeping layer 130 away from the display panel 110. Specifically, the polarizer 150 is located on the side of the first electrode layer 132 away from the display panel 110. The second adhesive layer 170 is located on the side of the polarizer 150 away from the display panel 110. The cover plate 140 is located on the side of the second adhesive layer 170 away from the display panel 110.

[0226] It should be noted that the positions of the polarizer 150 and the first substrate 133 in the anti-peep layer 130 can be interchanged; alternatively, the polarizer 150 can also be replaced by the second substrate 134, and the polarizer 150 can be arranged on the side of the first substrate 133 close to the display panel 110 or on the side of the second substrate 134 away from the display panel 110.

[0227] Since the thickness of the polarizer 150 is smaller than the thickness of the first substrate 133 and smaller than the thickness of the second substrate 134, the anti-peeping layer 130 includes the first substrate 133, and the polarizer 150 is located on the side of the anti-peeping layer 130 away from the display panel 110, and the positions of the polarizer 150 and the first substrate 133 in the anti-peeping layer 130 are interchanged, which can reduce the thickness of the touch display module 10.

[0228] It is understandable that along Fig.15 The cross-sectional view obtained by the cross-sectional view C-C' shown in FIG. Fig.16 The touch display module 10 is shown.

[0229] For example, Fig.17 A cross-sectional schematic diagram of a third touch display module in which the electrodes in the anti-peep layer provided in the embodiment of the present application are reused as touch electrodes. Fig.17 As shown, the touch display module 10 includes: a display panel 110 , an anti-peep layer 130 , a fourth adhesive layer 190 , a polarizer 150 , a second adhesive layer 170 and a cover plate 140 .

[0230] The anti-peep layer 130 includes a third electrode layer 138 , a dimming film layer 131 and a first electrode layer 132 , and the third electrode layer 138 , the dimming film layer 131 and the first electrode layer 132 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110 .

[0231] The third electrode layer 138 includes a plurality of fifth electrodes 1381 extending along the second direction, and the first electrode layer 132 includes a plurality of first electrodes 1321 extending along the first direction. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the fifth electrode 1381 and the first electrode 1321. In addition, one of the fifth electrode 1381 and the first electrode 1321 is multiplexed as a touch driving electrode, and the other is multiplexed as a touch sensing electrode.

[0232] The fourth adhesive layer 190 is located on a side of the anti-peeping layer 130 away from the display panel 110. Specifically, the fourth adhesive layer 190 is located on a side of the first electrode layer 132 away from the display panel 110. The polarizer 150 is located on a side of the fourth adhesive layer 190 away from the display panel 110. The second adhesive layer 170 is located on a side of the polarizer 150 away from the display panel 110. The cover plate 140 is located on a side of the second adhesive layer 170 away from the display panel 110.

[0233] It is understandable that along Fig.15 The cross-sectional view obtained by the cross-sectional view C-C' shown in FIG. Fig.17 The touch display module 10 is shown.

[0234] For example, Fig.18 A cross-sectional schematic diagram of a fourth touch display module in which the electrodes in the anti-peep layer provided in an embodiment of the present application are reused as touch electrodes, Fig.19 for Fig.18 A top view schematic diagram of the anti-peeping layer in the touch display module shown in FIG. Fig.18As shown, the touch display module 10 includes: a display panel 110 , a third adhesive layer 180 , a polarizer 150 , an anti-peep layer 130 , a second adhesive layer 170 and a cover plate 140 .

[0235] The third adhesive layer 180 is located between the display panel 110 and the polarizer 150 . The polarizer 150 is located on a side of the third adhesive layer 180 away from the display panel 110 .

[0236] like Fig.18 As shown, the anti-peep layer 130 includes a third electrode layer 138, a dimming film layer 131, a first electrode layer 132 and a second substrate 134. The third electrode layer 138, the dimming film layer 131, the first electrode layer 132 and the second substrate 134 are arranged in sequence away from the display panel 110 along the thickness direction of the display panel 110.

[0237] like Fig.19 As shown, the third electrode layer 138 is a surface electrode, the first electrode layer 132 includes a plurality of array-distributed sixth electrodes 1323, the sixth electrodes 1323 may be block electrodes, there is a gap between two adjacent sixth electrodes 1323 along the first direction, and there is also a gap between two adjacent sixth electrodes 1323 along the second direction. The first direction intersects the second direction.

[0238] The dimming film layer 131 includes an electrochromic layer, and the electrochromic layer includes a plurality of electrochromic portions 1311 extending along a third direction, and the third direction may be parallel to the second direction.

[0239] The first direction can be Fig.19 The X direction, the second direction and the third direction can be Fig.19 For example, the second direction and the third direction may be perpendicular to the first direction respectively.

[0240] In some embodiments, the dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the third electrode layer 138 and the plurality of sixth electrodes 1323. In addition, the sixth electrodes 1323 are multiplexed as touch electrodes, which are self-capacitive touch electrodes.

[0241] like Fig.18 As shown, the second adhesive layer 170 is located on the side of the anti-peeping layer 130 away from the display panel 110. Specifically, the second adhesive layer 170 is located on the side of the second substrate 134 away from the display panel 110. The cover plate 140 is located on the side of the second adhesive layer 170 away from the display panel 110.

[0242] It is understandable that along Fig.19 The cross-sectional view obtained by the cross-sectional view D-D' shown in FIG. Fig.18 The touch display module 10 is shown.

[0243] Above Figures 14 to 19 In the touch display module 10 shown, the dimming film layer 131 may include a polymer dispersed liquid crystal layer or an electrochromic layer. In the case where the dimming film layer 131 includes an electrochromic layer, the electrochromic layer includes a plurality of electrochromic portions 1311 extending along a third direction, each electrochromic portion 1311 is distributed in a strip shape, and there is a gap between two adjacent electrochromic portions 1311. Of course, in the case where the dimming film layer 131 includes an electrochromic layer, the electrochromic layer may not be patterned. Alternatively, in the case where the dimming film layer 131 includes a polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer may not be patterned.

[0244] Below Figures 14 to 17 The touch display module 10 shown is taken as an example to illustrate how the touch display module 10 implements the touch function and the anti-peeping function by adopting a time-sharing control method.

[0245] Reference Fig. 20 As shown, the touch display module 10 can alternately work in the touch stage and the display stage, and the touch stage and the display stage in each frame are separated in time, such as the duration of each frame can be 16.6ms. In addition, when the touch display module 10 works in the display stage, the touch display module 10 can be in the anti-peeping mode or the non-anti-peeping mode.

[0246] The fifth electrode 1381 and the first electrode 1321 in the touch display module 10 can be multiplexed as touch electrodes. The following description takes the fifth electrode 1381 multiplexed as a touch driving electrode and the first electrode 1321 multiplexed as a touch sensing electrode as an example.

[0247] When the touch display module 10 is operating in the touch stage, a touch driving signal may be applied to the fifth electrode 1381. The touch driving signal may be: Fig. 20 The square wave signal shown; an eighth voltage signal may be applied to the first electrode 1321, and the eighth voltage signal is a DC voltage signal.

[0248] Among them, the value corresponding to the voltage when the touch drive signal is at the peak and the value corresponding to the voltage when it is at the trough can be opposite to each other, and the voltage of the eighth voltage signal can be the average value of the voltage when the touch drive signal is at the peak and the voltage when it is at the trough.

[0249] For example, the voltage of the touch driving signal at the peak may be 1.5 V, and the voltage of the touch driving signal at the valley may be -1.5 V. The eighth voltage signal applied to the first electrode 1321 may be a DC voltage signal of 0 V. In this way, the voltage difference between the eighth voltage signal applied to the first electrode 1321 and the voltage of the touch driving signal applied to the fifth electrode 1381 is continuously switched between 1.5 V and -1.5 V.

[0250] However, since the duration of each frame is in the microsecond level, such as 16.6ms, and the duration of the touch stage in each frame accounts for a smaller proportion of the duration of the display stage in each frame, the duration of the touch stage accounts for a small portion of the duration of each frame, so that the duration of the dimming film layer 131 switching between the light-transmitting state and the light-shielding state is shorter. In addition, since the signal frequency of the touch drive signal is relatively high, the frequency of the dimming film layer 131 switching between the light-transmitting state and the light-shielding state is very high. In this way, the human eye is ultimately less likely to notice the jitter caused by the continuous switching of the dimming film layer 131 between the light-transmitting state and the light-shielding state, thereby improving the anti-peeping or non-anti-peeping display effect in the touch stage.

[0251] In addition, taking the dimming film layer 131 including the electrochromic layer as an example, since the electrochromic layer is conductive, the touch driving signal applied to the fifth electrode 1381 will be transmitted to the first electrode 1321 through the electrochromic layer, resulting in that in the touch stage, the current signal output by the first electrode 1321 includes: the current signal transmitted due to the conductivity of the electrochromic layer, and the current signal coupled by the touch capacitor formed between the first electrode 1321 and the fifth electrode 1381. However, since the response speed of the electrochromic layer is relatively slow, and the response speed of the touch capacitor is relatively fast, therefore, in the touch stage, most of the early signals in the current signal output by the first electrode 1321 are current signals coupled by the touch capacitor formed between the first electrode 1321 and the fifth electrode 1381. In this way, touch detection can be implemented based on the early signals in the current signal output by the first electrode 1321 to improve the accuracy of touch detection.

[0252] When the touch display module 10 operates in the display stage and is in the anti-peeping mode, a ninth voltage signal may be applied to the first electrode 1321 and a tenth voltage signal may be applied to the fifth electrode 1381 to control the dimming film layer 131 to present a light-shielding state.

[0253] The ninth voltage signal and the tenth voltage signal are both DC voltage signals, and the voltage difference between the ninth voltage signal and the tenth voltage signal is greater than the fourth voltage threshold. The fourth voltage threshold can be set according to actual conditions, for example, the fourth voltage threshold can be 0V.

[0254] For example, the ninth voltage signal applied to the first electrode 1321 may be a DC voltage signal of 1.5V, and the tenth voltage signal applied to the fifth electrode 1381 may be a DC voltage signal of 0V, and the voltage difference between the voltage of the ninth voltage signal and the voltage of the tenth voltage signal may be 1.5V.

[0255] When the touch display module 10 operates in the display stage and is in the non-peeping mode, an eleventh voltage signal can be applied to the first electrode 1321 and a twelfth voltage signal can be applied to the fifth electrode 1381 to control the dimming film layer 131 to be in a light-transmitting state.

[0256] The eleventh voltage signal and the twelfth voltage signal are both DC voltage signals, and the voltage difference between the voltage of the eleventh voltage signal and the voltage of the twelfth voltage signal is less than the fifth voltage threshold. The fifth voltage threshold can be set according to actual conditions, for example, the fifth voltage threshold can be 0V.

[0257] In some embodiments, the voltage of the twelfth voltage signal may be equal to the voltage of the tenth voltage signal, and the value corresponding to the voltage of the eleventh voltage signal and the value corresponding to the voltage of the ninth voltage signal are opposite to each other.

[0258] For example, the eleventh voltage signal applied to the first electrode 1321 may be a DC voltage signal of -1.5V, and the twelfth voltage signal applied to the fifth electrode 1381 may be a DC voltage signal of 0V, then the voltage difference between the voltage of the eleventh voltage signal and the voltage of the twelfth voltage signal may be -1.5V.

[0259] In summary, the specific implementation method of time-division multiplexing of the fifth electrode 1381 and the first electrode 1321 in the touch display module 10 is described. Of course, in other embodiments, when the touch display module 10 works in the touch stage, the eighth voltage signal applied to the first electrode 1321 may be different when the touch display module 10 is in the anti-peeping mode and the non-anti-peeping mode.

[0260] Specifically, when the touch display module 10 operates in the touch stage, a touch driving signal may be applied to the fifth electrode 1381 , and an eighth voltage signal may be applied to the first electrode 1321 , where the eighth voltage signal is a DC voltage signal.

[0261] Wherein, when the touch display module 10 works in the touch stage and the touch display module 10 is in the anti-peeping mode, the voltage of the eighth voltage signal applied to the first electrode 1321 may be the first voltage. When the touch display module 10 works in the touch stage and the touch display module 10 is in the non-anti-peeping mode, the voltage of the eighth voltage signal applied to the first electrode 1321 may be the second voltage.

[0262] Furthermore, the voltage of the touch driving signal applied to the fifth electrode 1381 when it is at a peak may be equal to the first voltage, and the voltage of the touch driving signal applied to the fifth electrode 1381 when it is at a valley may be equal to the second voltage. The value corresponding to the first voltage and the value corresponding to the second voltage are opposite numbers.

[0263] For example, the voltage of the touch driving signal at the peak may be 0.75 V, and the voltage of the touch driving signal at the trough may be -0.75 V. When the touch display module 10 operates in the touch stage and the touch display module 10 is in the anti-peeping mode, the eighth voltage signal applied to the first electrode 1321 may be a 0.75 V DC voltage signal; when the touch display module 10 operates in the touch stage and the touch display module 10 is in the non-anti-peeping mode, the eighth voltage signal applied to the first electrode 1321 may be a -0.75 V DC voltage signal.

[0264] The above is for the time-sharing control method in the mutual-capacity scenario. Fig.18 and Fig.19 The touch display module 10 shown can also use a time-sharing control method to realize the touch function and the anti-peeping function.

[0265] Specifically, the sixth electrode 1323 in the touch display module 10 can be multiplexed in time division, and the sixth electrode 1323 is multiplexed as a touch driving electrode.

[0266] When the touch display module 10 operates in the touch stage, a touch driving signal may be applied to the sixth electrode 1323 , and the touch driving signal may be a square wave signal. A thirteenth voltage signal may be applied to the third electrode layer 138 , and the thirteenth voltage signal may be a DC voltage signal.

[0267] Among them, the value corresponding to the voltage when the touch driving signal is at the peak and the value corresponding to the voltage when it is at the trough can be opposite to each other, and the voltage of the thirteenth voltage signal can be the average value of the voltage when the touch driving signal is at the peak and the voltage when it is at the trough.

[0268] For example, the voltage of the touch driving signal at a peak may be 1.5 V, and the voltage of the touch driving signal at a valley may be −1.5 V. The thirteenth voltage signal applied to the third electrode layer 138 may be a 0V DC voltage signal.

[0269] Alternatively, when the touch display module 10 operates in the touch stage and the touch display module 10 is in the anti-peeping mode, the voltage of the thirteenth voltage signal applied to the third electrode layer 138 may be the third voltage. When the touch display module 10 operates in the touch stage and the touch display module 10 is in the non-anti-peeping mode, the voltage of the thirteenth voltage signal applied to the third electrode layer 138 may be the fourth voltage.

[0270] Furthermore, the voltage of the touch driving signal applied to the sixth electrode 1323 when it is at a peak may be equal to the fourth voltage, and the voltage of the touch driving signal applied to the sixth electrode 1323 when it is at a valley may be equal to the third voltage. The value corresponding to the third voltage and the value corresponding to the fourth voltage are opposite numbers.

[0271] For example, the voltage of the touch driving signal at the peak may be 0.75 V, and the voltage of the touch driving signal at the trough may be -0.75 V. When the touch display module 10 operates in the touch stage and the touch display module 10 is in the anti-peeping mode, the thirteenth voltage signal applied to the third electrode layer 138 may be a -0.75 V DC voltage signal; when the touch display module 10 operates in the touch stage and the touch display module 10 is in the non-anti-peeping mode, the thirteenth voltage signal applied to the third electrode layer 138 may be a 0.75 V DC voltage signal.

[0272] When the touch display module 10 is operating in the display stage and in the anti-peeping mode, a fourteenth voltage signal may be applied to the sixth electrode 1323 and a fifteenth voltage signal may be applied to the third electrode layer 138 to control the dimming film layer 131 to be in a light-shielding state.

[0273] The fourteenth voltage signal and the fifteenth voltage signal are both DC voltage signals, and the voltage difference between the voltage of the fourteenth voltage signal and the voltage of the fifteenth voltage signal is greater than the sixth voltage threshold. The sixth voltage threshold can be set according to actual conditions, for example, the sixth voltage threshold can be 0V.

[0274] For example, the fourteenth voltage signal applied to the sixth electrode 1323 may be a DC voltage signal of 1.5V, and the fifteenth voltage signal applied to the third electrode layer 138 may be a DC voltage signal of 0V, then the voltage difference between the voltage of the fourteenth voltage signal and the voltage of the fifteenth voltage signal may be 1.5V.

[0275] When the touch display module 10 is operating in the display stage and in the non-peeping mode, a sixteenth voltage signal can be applied to the sixth electrode 1323 and a seventeenth voltage signal can be applied to the third electrode layer 138 to control the dimming film layer 131 to be in a light-transmitting state.

[0276] The sixteenth voltage signal and the seventeenth voltage signal are both DC voltage signals, and the voltage difference between the sixteenth voltage signal and the seventeenth voltage signal is less than the seventh voltage threshold. The seventh voltage threshold can be set according to actual conditions, for example, the seventh voltage threshold can be 0V.

[0277] For example, the sixteenth voltage signal applied to the sixth electrode 1323 may be a DC voltage signal of -1.5V, and the seventeenth voltage signal applied to the third electrode layer 138 may be a DC voltage signal of 0V, then the voltage difference between the voltage of the sixteenth voltage signal and the voltage of the seventeenth voltage signal may be -1.5V.

[0278] In addition, for the time-sharing control method in the self-contained scenario, you can also remove Fig.18 and Fig.19 The third electrode layer 138 in the touch display module 10 shown. In this case, when the touch display module 10 works in the touch stage, a touch drive signal is applied to the sixth electrode 1323 to perform touch detection. When the touch display module 10 works in the display stage and the touch display module 10 is in the anti-peeping mode, different voltage signals can be applied to any two adjacent rows of sixth electrodes 1323, for example, a 1.5V DC voltage signal is applied to one row of the sixth electrodes 1323, and a -1.5V DC voltage signal is applied to the other row of the sixth electrodes 1323. When the touch display module 10 works in the display stage and the touch display module 10 is in the non-anti-peeping mode, the same voltage signal can be applied to each sixth electrode 1323, or no voltage signal can be applied.

[0279] Therefore, the embodiment of the present application can reuse the electrodes in the anti-peeping layer 130 as touch electrodes, and the electrodes in the anti-peeping layer 130 can drive the dimming film layer 131 to present a light-transmitting state or a light-shielding state while realizing touch detection. In this way, a signal for driving the dimming film layer 131 can be applied to the electrodes in the anti-peeping layer 130 in the display stage, and a touch driving signal can be applied to the electrodes in the anti-peeping layer 130 in the touch stage, and the response speed of the dimming film layer 131 to the current and the response speed of the touch capacitor are used to realize the separation of the touch sensing signal, so that the anti-peeping or non-anti-peeping display effect of the touch display module 10 is not affected while realizing touch detection.

[0280] Below Figures 14 to 17The touch display module 10 shown is taken as an example to illustrate how the touch display module 10 uses a frequency division control method to realize the touch function and the anti-peeping function.

[0281] Reference Fig.21 As shown, the touch display module 10 has an anti-peeping mode and a non-anti-peeping mode. Each frame of the touch display module 10 when in the anti-peeping mode may include a touch stage and a display stage. Each frame of the touch display module 10 when in the non-anti-peeping mode also includes a touch stage and a display stage.

[0282] The fifth electrode 1381 and the first electrode 1321 may be multiplexed as touch electrodes. The following description will be made by taking the fifth electrode 1381 being multiplexed as a touch driving electrode and the first electrode 1321 being multiplexed as a touch sensing electrode as an example.

[0283] In the touch stage and the display stage when the touch display module 10 is in the anti-peeping mode, a touch driving signal may be applied to the fifth electrode 1381. The touch driving signal may be as follows: Fig.21 The square wave signal shown, and an eighteenth voltage signal is applied to the first electrode 1321 to control the dimming film layer 131 to present a light shielding state.

[0284] Since the frequency of the touch driving signal is relatively high, the voltage applied to the fifth electrode 1381 can be regarded as the average voltage of the touch driving signal. The average voltage of the touch driving signal is the average of the voltage at the peak and the voltage at the valley.

[0285] The eighteenth voltage signal is a DC voltage signal. The voltage difference between the voltage of the eighteenth voltage signal applied to the first electrode 1321 and the average voltage of the touch drive signal applied to the fifth electrode 1381 is greater than the eighth voltage threshold. The eighth voltage threshold can be set according to actual conditions, for example, the eighth voltage threshold can be 0V.

[0286] For example, the eighteenth voltage signal applied to the first electrode 1321 may be a DC voltage signal of 1.5V, and the average voltage of the touch drive signal applied to the fifth electrode 1381 may be 0V, then the voltage difference between the voltage of the eighteenth voltage signal and the average voltage of the touch drive signal may be 1.5V.

[0287] In the touch stage and display stage when the touch display module 10 is in the non-peeping mode, a touch driving signal can be applied to the fifth electrode 1381, and a nineteenth voltage signal can be applied to the first electrode 1321 to control the dimming film layer 131 to be in a light-transmitting state.

[0288] The nineteenth voltage signal is a DC voltage signal. The voltage difference between the voltage of the nineteenth voltage signal applied to the first electrode 1321 and the average voltage of the touch drive signal applied to the fifth electrode 1381 is less than the ninth voltage threshold. The ninth voltage threshold can be set according to actual conditions, for example, the ninth voltage threshold can be 0V.

[0289] For example, the nineteenth voltage signal applied to the first electrode 1321 may be a DC voltage signal of -1.5V, and the average voltage of the touch drive signal applied to the fifth electrode 1381 may be 0V, then the voltage difference between the voltage of the nineteenth voltage signal and the average voltage of the touch drive signal may be -1.5V.

[0290] Therefore, no matter in the touch stage or the display stage, the touch driving signal is applied to the fifth electrode 1381. Taking the dimming film layer 131 including the electrochromic layer as an example, since the electrochromic layer is conductive, the touch driving signal applied to the fifth electrode 1381 is transmitted to the first electrode 1321 through the electrochromic layer, so that the current signal output by the first electrode 1321 includes: the current signal transmitted due to the conductivity of the electrochromic layer, and the current signal coupled by the touch capacitance formed between the first electrode 1321 and the fifth electrode 1381. Therefore, touch detection can be realized based on the previous signal in the current signal output by the first electrode 1321.

[0291] The above is for the frequency division control method in the mutual capacitance scenario. Of course, for Fig.18 and Fig.19 The touch display module 10 shown can also use a frequency division control method to achieve a touch function and an anti-peeping function.

[0292] Specifically, in the touch stage and display stage when the touch display module 10 is in the anti-peep mode, a touch drive signal can be applied to the sixth electrode 1323, the touch drive signal can be a square wave signal, and a twentieth voltage signal can be applied to the third electrode layer 138, and the twentieth voltage signal is a DC voltage signal.

[0293] The voltage difference between the average voltage of the touch driving signal applied to the sixth electrode 1323 and the voltage of the twentieth voltage signal applied to the third electrode layer 138 is greater than the tenth voltage threshold. The tenth voltage threshold can be set according to actual conditions, for example, the tenth voltage threshold can be 0V.

[0294] For example, the average voltage of the touch driving signal applied to the sixth electrode 1323 may be 0V, and the twentieth voltage signal applied to the third electrode layer 138 may be a DC voltage signal of -1.5V, then the difference between the average voltage of the touch driving signal and the voltage of the twentieth voltage signal may be 1.5V.

[0295] During the touch stage and display stage when the touch display module 10 is in the non-peeping mode, a touch driving signal can be applied to the sixth electrode 1323, and the touch driving signal can be a square wave signal. A twenty-first voltage signal can be applied to the third electrode layer 138, and the twenty-first voltage signal is a DC voltage signal.

[0296] The voltage difference between the average voltage of the touch driving signal applied to the sixth electrode 1323 and the voltage of the twenty-first voltage signal applied to the third electrode layer 138 is less than the eleventh voltage threshold. The eleventh voltage threshold can be set according to actual conditions, for example, the eleventh voltage threshold can be 0V.

[0297] For example, the average voltage of the touch driving signal applied to the sixth electrode 1323 may be 0V, and the twenty-first voltage signal applied to the third electrode layer 138 may be a DC voltage signal of 1.5V, then the difference between the average voltage of the touch driving signal and the voltage of the twenty-first voltage signal may be -1.5V.

[0298] Therefore, in the embodiment of the present application, the electrodes in the anti-peep layer 130 can be reused as touch electrodes. While realizing touch detection, the electrodes in the anti-peep layer 130 can drive the dimming film layer 131 to present a light-transmitting state or a light-shielding state.

[0299] For example, Fig. 22 The cross-sectional diagram of the first touch display module provided in the embodiment of the present application in which the anti-peeping layer is located below the touch layer. Fig. 22 As shown, the touch display module 10 includes: a display panel 110 , an anti-peeping layer 130 , a touch layer 120 and a cover plate 140 .

[0300] The anti-peeping layer 130 includes a third electrode layer 138, a dimming film layer 131 and a first electrode layer 132. The third electrode layer 138, the dimming film layer 131 and the first electrode layer 132 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110, that is, the first electrode layer 132 and the third electrode layer 138 are respectively located on both sides of the dimming film layer 131 in the thickness direction of the display panel 110. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0301] like Fig. 22 As shown, the touch layer 120 is located on the side of the anti-peeping layer 130 away from the display panel 110 , specifically, the touch layer 120 is located on the side of the first electrode layer 132 away from the display panel 110 . The cover plate 140 is located on the side of the touch layer 120 away from the display panel 110 .

[0302] Since the third electrode layer 138 and the first electrode layer 132 in the anti-peeping layer 130 are located on the side of the touch layer 120 close to the display panel 110, the third electrode layer 138 and the first electrode layer 132 have little shielding effect on the touch electrodes in the touch layer 120. In this way, the touch display module 10 can normally realize the touch function and the anti-peeping function.

[0303] For example, Fig.23 The cross-sectional diagram of the second touch display module provided in the embodiment of the present application in which the anti-peeping layer is located below the touch layer. Fig.23 As shown, the touch display module 10 includes: a display panel 110 , a third adhesive layer 180 , an anti-peep layer 130 , a polarizer 150 , a touch layer 120 , a second adhesive layer 170 and a cover plate 140 .

[0304] The third adhesive layer 180 is located between the display panel 110 and the anti-peeping layer 130 , and is used to adhere the anti-peeping layer 130 to the light emitting side of the display panel 110 .

[0305] The anti-peeping layer 130 may include a first substrate 133, a third electrode layer 138, a dimming film layer 131, and a first electrode layer 132. The first substrate 133, the third electrode layer 138, the dimming film layer 131, and the first electrode layer 132 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0306] like Fig.23 As shown, the polarizer 150 is located on the side of the anti-peeping layer 130 away from the display panel 110. Specifically, the polarizer 150 is located on the side of the first electrode layer 132 away from the display panel 110. The touch layer 120 is located on the side of the polarizer 150 away from the display panel 110. The second adhesive layer 170 is located on the side of the touch layer 120 away from the display panel 110. The cover plate 140 is located on the side of the second adhesive layer 170 away from the display panel 110.

[0307] It should be noted that the positions of the polarizer 150 and the first substrate 133 in the privacy layer 130 can be interchanged; or, the polarizer 150 can be replaced by the second substrate 134, and the polarizer 150 is arranged on the side of the first substrate 133 close to the display panel 110 or on the side of the second substrate 134 far from the display panel 110. In addition, Fig.23 The touch display module 10 shown may also be referred to as an external touch display module.

[0308] For example, Fig.24 This is a cross-sectional schematic diagram of a third touch display module provided in an embodiment of the present application, in which the anti-peeping layer is located below the touch layer. Fig.24 As shown, the touch display module 10 includes: a display panel 110 , a third adhesive layer 180 , an anti-peep layer 130 , a polarizer 150 , a second adhesive layer 170 , a touch layer 120 and a cover plate 140 .

[0309] The third adhesive layer 180 is located between the display panel 110 and the anti-peeping layer 130 , and is used to adhere the anti-peeping layer 130 to the light emitting side of the display panel 110 .

[0310] The anti-peeping layer 130 may include a first substrate 133, a third electrode layer 138, a dimming film layer 131, and a first electrode layer 132. The first substrate 133, the third electrode layer 138, the dimming film layer 131, and the first electrode layer 132 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0311] like Fig.24 As shown, the polarizer 150 is located on the side of the anti-peeping layer 130 away from the display panel 110. Specifically, the polarizer 150 is located on the side of the first electrode layer 132 away from the display panel 110. The second adhesive layer 170 is located on the side of the polarizer 150 away from the display panel 110. The touch layer 120 is located on the side of the second adhesive layer 170 away from the display panel 110. The cover plate 140 is located on the side of the touch layer 120 away from the display panel 110.

[0312] It should be noted that Fig.24 The touch display module 10 shown in the figure forms a touch layer 120 on a cover plate 140, and then the cover plate 140 formed with the touch layer 120 is bonded to other film layers through a second adhesive layer 170. Fig.24 The touch display module 10 shown may also be referred to as an on glass solution (OGS) touch display module.

[0313] For example, Fig.25 This is a cross-sectional schematic diagram of a fourth touch display module in which the anti-peeping layer is located below the touch layer provided in an embodiment of the present application. Fig.25 As shown, the touch display module 10 includes: a display panel 110 , an anti-peep layer 130 , a fourth insulating layer 191 , a touch layer 120 , a fourth adhesive layer 190 , a polarizer 150 , a second adhesive layer 170 , and a cover plate 140 .

[0314] The anti-peeping layer 130 includes a third electrode layer 138, a dimming film layer 131 and a first electrode layer 132. The third electrode layer 138, the dimming film layer 131 and the first electrode layer 132 are sequentially arranged away from the display panel 110 along the thickness direction of the display panel 110. The dimming film layer 131 is used to present a light-transmitting state or a light-shielding state under the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0315] like Fig.25 As shown, the fourth insulating layer 191 is located on the side of the anti-peeping layer 130 away from the display panel 110. Specifically, the fourth insulating layer 191 is located on the side of the first electrode layer 132 away from the display panel 110. The touch layer 120 is located on the side of the fourth insulating layer 191 away from the display panel 110. The fourth adhesive layer 190 is located on the side of the touch layer 120 away from the display panel 110. The polarizer 150 is located on the side of the fourth adhesive layer 190 away from the display panel 110. The second adhesive layer 170 is located on the side of the polarizer 150 away from the display panel 110. The cover plate 140 is located on the side of the second adhesive layer 170 away from the display panel 110.

[0316] In an embodiment of the present application, for a touch display module in which the anti-peep layer 130 is located below the touch layer 120, in the thickness direction of the display panel 110, the distance between the electrode in the anti-peep layer 130 close to the touch layer 120 and the touch electrode in the touch layer 120 close to the anti-peep layer 130 can be set to be greater than 8 microns.

[0317] by Fig.25 Taking the touch display module 10 shown in the figure as an example, the thickness of the fourth insulating layer 191 is actually set to be greater than 8 microns. Fig.23 Taking the touch display module 10 as an example, the thickness of the polarizer 150 is actually set to be greater than 8 microns. Fig.24 Taking the touch display module 10 as an example, the total thickness of the polarizer 150 and the second adhesive layer 170 is actually set to be greater than 8 micrometers.

[0318] In this way, by setting the distance between the electrode in the anti-peep layer 130 close to the touch layer 120 and the touch electrode in the touch layer 120 close to the anti-peep layer 130 to be greater than 8 microns in the thickness direction of the display panel 110, the shielding effect of the electrode in the anti-peep layer 130 on the touch electrode can be reduced.

[0319] against Figure 22 to Figure 25In the touch display module 10 shown, the first electrode layer 132 and the third electrode layer 138 can both be surface electrodes. The dimming film layer 131 includes an electrochromic layer, and the electrochromic layer includes a plurality of electrochromic portions 1311 extending along a third direction, each electrochromic portion 1311 is distributed in a strip shape, and there is a gap between two adjacent electrochromic portions 1311. The third direction can be the row direction of the display panel 110, or the column direction of the display panel 110.

[0320] Of course, in other embodiments, when the dimming film layer 131 includes an electrochromic layer, the electrochromic layer may not be patterned, but the first electrode layer 132 and / or the third electrode layer 138 may be patterned. Alternatively, when the dimming film layer 131 includes a polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer may not be patterned, but the first electrode layer 132 and / or the third electrode layer 138 may be patterned. The patterning method of the first electrode layer 132 and / or the third electrode layer 138 may refer to the above Fig.15 or Fig.19 shown.

[0321] And, for Figure 22 to Figure 25 In the touch display module 10 shown in FIG. 1 , the touch layer 120 includes a first touch electrode layer 121, a third insulating layer 122, and a second touch electrode layer 123. The specific structures of the first touch electrode layer 121 and the second touch electrode layer 123 can refer to the above Fig.11 , Fig.12 or Fig.13 To avoid repetition, the structure shown will not be described again here.

[0322] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A touch display module, characterized in that: include: Display panel; A touch layer, located on the light-emitting side of the display panel; An anti-peeping layer is located on a side of the touch layer away from the display panel; the anti-peeping layer includes a dimming film layer and a first electrode layer, and the dimming film layer and the first electrode layer are sequentially stacked in a thickness direction of the display panel; The first electrode layer includes a plurality of first electrodes extending along a first direction, each of the first electrodes is a strip electrode, and there is a gap between two adjacent first electrodes; the dimming film layer is used to present a light-transmitting state or a light-shielding state under at least the voltage applied by the plurality of first electrodes; When the dimming film layer is in the light-transmitting state, the touch display module is in the non-peeping mode; when the dimming film layer is in the light-shielding state, the touch display module is in the peeping mode.

2. The touch display module according to claim 1, characterized in that: The first electrode layer further includes a plurality of first virtual electrodes, the first virtual electrodes are arranged in the same layer as the first electrodes, and each of the first virtual electrodes is located in a gap between two adjacent first electrodes; The transmittance of the first virtual electrode is the same as the transmittance of the first electrode.

3. The touch display module according to claim 1, characterized in that: The anti-peeping layer further includes a first electrode control layer, the first electrode control layer and the first electrode layer are both located on the same side of the dimming film layer, and the first electrode control layer includes: A second electrode layer, the second electrode layer comprising a plurality of second electrodes extending along a second direction, each of the second electrodes being a strip electrode, and a gap exists between two adjacent second electrodes; the second direction intersects the first direction; a plurality of third electrodes, each of the third electrodes being located in a region defined by the intersection of the plurality of first electrodes and the plurality of second electrodes; A plurality of switch tubes, wherein a gate of each of the switch tubes is connected to the second electrode, a first electrode of each of the switch tubes is connected to the first electrode, and a second electrode of each of the switch tubes is connected to the third electrode; Among them, multiple switch tubes located in the same row in the second direction are connected to the same second electrode, and multiple switch tubes located in the same row in the first direction are connected to the same first electrode, and each switch tube is used to be disconnected during the touch stage to control the third electrode connected to it to be in a suspended state.

4. The touch display module according to claim 3, characterized in that: Each of the third electrodes is disposed in the same layer as the first electrode, and an orthographic projection of each of the third electrodes on the display panel does not overlap with an orthographic projection of the first electrode on the display panel.

5. The touch display module according to claim 3, characterized in that: The second electrode layer and the first electrode layer are arranged in different layers, an insulating layer is arranged between the second electrode layer and the first electrode layer, and the first electrode layer is located on a side of the second electrode layer close to the dimming film layer.

6. The touch display module according to claim 5, characterized in that: Each of the switch tubes comprises an active layer, a gate, a first electrode and a second electrode; a first insulating layer is provided between the active layer and the gate, and a second insulating layer is provided between the gate and the first electrode and the second electrode; The gate electrode and the second electrode are arranged in the same layer, and the first electrode and the second electrode are arranged in the same layer as the first electrode.

7. The touch display module according to claim 1, characterized in that: The first electrode layer is located on a side of the dimming film layer away from the display panel, or the first electrode layer is located on a side of the dimming film layer close to the display panel.

8. The touch display module according to claim 1, characterized in that: The plurality of first electrodes are divided into a plurality of first electrode groups, each of the first electrode groups includes two adjacent first electrodes; The dimming film layer is specifically used for presenting the light shielding state when the first voltage signal and the second voltage signal are applied to two adjacent first electrodes in each first electrode group respectively; And when two adjacent first electrodes in each first electrode group are both applied with a third voltage signal or are not applied with a voltage signal, they present the light-transmitting state; The first voltage signal, the second voltage signal and the third voltage signal are all DC voltage signals, and a voltage difference between a voltage of the first voltage signal and a voltage of the second voltage signal is greater than a first voltage threshold.

9. The touch display module according to claim 1, characterized in that: The anti-peeping layer further includes a third electrode layer, and the first electrode layer and the third electrode layer are respectively located on both sides of the dimming film layer in the thickness direction of the display panel; In which, the third electrode layer includes a plurality of fourth electrodes extending along the first direction, each of the fourth electrodes is a strip electrode, and there is a gap between two adjacent fourth electrodes; the orthographic projection of each of the fourth electrodes on the display panel has an overlapping area with the orthographic projection of the first electrode on the display panel.

10. The touch display module according to claim 9, characterized in that: The plurality of fourth electrodes are divided into a plurality of second electrode groups, each of the second electrode groups includes two adjacent fourth electrodes; The dimming film layer is further used for presenting the light-shielding state when the first voltage signal and the second voltage signal are applied to two adjacent fourth electrodes in each second electrode group respectively; and presenting the light-transmitting state when the third voltage signal is applied to two adjacent fourth electrodes in each second electrode group or no voltage signal is applied to both. Among them, for the first electrode and the fourth electrode whose orthographic projections on the display panel have an overlapping area, the voltages of the voltage signals applied thereto are the same; the first voltage signal, the second voltage signal and the third voltage signal are all DC voltage signals, and the voltage difference between the voltage of the first voltage signal and the voltage of the second voltage signal is greater than a first voltage threshold.

11. The touch display module according to claim 9, characterized in that: The dimming film layer is specifically used for presenting the light shielding state when a fourth voltage signal is applied to each of the first electrodes and a fifth voltage signal is applied to each of the fourth electrodes; and in the case where a sixth voltage signal is applied to each of the first electrodes and a seventh voltage signal is applied to each of the fourth electrodes, the light-transmitting state is presented; Among them, the fourth voltage signal, the fifth voltage signal, the sixth voltage signal and the seventh voltage signal are all DC voltage signals; the voltage difference between the voltage of the fourth voltage signal and the voltage of the fifth voltage signal is greater than the second voltage threshold, the voltage difference between the voltage of the sixth voltage signal and the voltage of the seventh voltage signal is less than the third voltage threshold, and the second voltage threshold is greater than or equal to the third voltage threshold.

12. The touch display module according to claim 9, characterized in that: The third electrode layer further includes a plurality of second virtual electrodes, which are arranged in the same layer as the fourth electrodes, and each of the second virtual electrodes is located in a gap between two adjacent fourth electrodes; The transmittance of the second virtual electrode is the same as the transmittance of the fourth electrode.

13. The touch display module according to claim 9, characterized in that: The anti-peeping layer further includes a second electrode control layer, and the second electrode control layer and the third electrode layer are both located on the same side of the dimming film layer; The layer structure included in the second electrode control layer is the same as the layer structure included in the first electrode control layer located on the other side of the dimming film layer, and is symmetrically arranged relative to the dimming film layer.

14. The touch display module according to any one of claims 1 to 13, characterized in that: A gap between two adjacent first electrodes is greater than or equal to 980 micrometers.

15. The touch display module according to claim 1, characterized in that: The dimming film layer includes a polymer dispersed liquid crystal layer or an electrochromic layer.

16. The touch display module according to claim 15, characterized in that: The electrochromic layer includes a plurality of electrochromic portions extending along a third direction, each of the electrochromic portions is distributed in a strip shape, and there is a gap between two adjacent electrochromic portions; the third direction intersects with the first direction.

17. The touch display module according to claim 1, characterized in that: The material of the first electrode is a transparent conductive material; or the first electrode includes a plurality of metal grids.

18. The touch display module according to claim 1, characterized in that: The anti-peeping layer further includes a first substrate and a second substrate, the first substrate is located on a side of the dimming film layer away from the first electrode layer, and the second substrate is located on a side of the first electrode layer away from the dimming film layer; The touch display module also includes: a polarizer, a first adhesive layer, a second adhesive layer and a cover plate; the polarizer and the first adhesive layer are located between the touch layer and the anti-peep layer, and the first adhesive layer is located on a side of the polarizer away from the display panel; the second adhesive layer is located on a side of the anti-peep layer away from the display panel; the cover plate is located on a side of the second adhesive layer away from the display panel.

19. An electronic device, characterized in that: It comprises a shell and a touch display module as claimed in any one of claims 1 to 18, wherein the touch display module is mounted on the shell.

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