Touch-control display module and electronic device

Abstract

A touch-control display module (10) and an electronic device. The touch-control display module (10) comprises a display panel (110), a touch-control layer (120), and a peep-proof layer (130). The touch-control layer (120) is located on a light-emergent side of the display panel (110), and the peep-proof layer (130) is located on the side of the touch-control layer (120) that is away from the display panel (110). The peep-proof layer (130) comprises a PDLC film layer (131) and a first electrode layer (132), which are stacked in sequence in the direction of thickness of the display panel (110), wherein the first electrode layer (132) comprises a plurality of first electrodes (1321) extending in a first direction; each first electrode (1321) is a strip-shaped electrode; there is a gap between two adjacent first electrodes (1321); and the PDLC film layer (131) is configured for presenting a light-transmitting state or a light-shielding state at least under the action of a voltage applied by the plurality of first electrodes (1321). By means of the peep-proof layer (130), the touch-control display module (10) can achieve a peep-proof function; and by means of patterning the first electrode layer (132) in order to reduce the shielding effect of the first electrode layer (132) on a touch-control electrode in the touch-control layer (120), the touch-control display module (10) can achieve a touch-control function in a normal manner. The electronic device comprises a housing (20) and the touch-control display module (10).

Description

Touch display modules and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on August 16, 2023, with application number 202311036028.6 and application name “Touch display module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic technology, and in particular to a touch display module and an electronic device. Background Art

[0003] With the continuous development of electronic technology, electronic devices with touch functions have gradually become common tools in people's daily lives and work. In recent years, users have also paid more and more attention to the protection of personal privacy. However, some electronic devices have a wide viewing angle range and lack anti-peeping effect. As a result, when users use electronic devices in public places such as subways, buses, and high-speed trains, the information they browse may be viewed by others, which can easily lead to the leakage of personal privacy.

[0004] Therefore, how to implement an anti-peeping function in a touch display module with a touch function has become an urgent problem to be solved.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a touch display module and an electronic device. By setting an anti-peeping layer on the side of the touch layer away from the display panel and patterning the first electrode layer in the anti-peeping layer, the shielding effect of the first electrode layer on the touch electrodes in the touch layer is reduced, so that the touch display module can realize both touch function and anti-peeping function.

[0007] In a first aspect, an 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 comprising a dimming film layer and a first electrode layer, the dimming film layer and the first electrode layer being stacked in sequence in the thickness direction of the display panel. The first electrode layer comprises a plurality of first electrodes extending along a first direction, each first electrode being a strip electrode, and a gap existing between two adjacent first electrodes; the dimming film layer is configured to exhibit a light-transmitting state or a light-shielding state under at least the action of a voltage applied by the plurality of first electrodes; when the dimming film layer is in a light-transmitting state, the touch display module is in a non-privacy mode; when the dimming film layer is in a light-shielding state, the touch display module is in an anti-peeping mode.

[0008] In this way, by providing 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, that is, the first electrode layer is patterned, so as to reduce the shielding effect of the first electrode layer on the touch electrodes in the touch layer, so that the touch display module can normally realize the touch function.

[0009] In one possible implementation, the first electrode layer further includes a plurality of first dummy electrodes, which are disposed in the same layer as the first electrodes, and each first dummy electrode is located in a gap between two adjacent first electrodes; wherein the transmittance of the first dummy electrodes is the same as the transmittance of the first electrodes. Thus, when the dimming film layer is in a light-transmitting state, the transmittance at the location of the first electrodes is consistent with the transmittance at the location of the first dummy electrodes, thereby reducing the brightness difference between the location of the first electrodes and the gap between two adjacent first electrodes on the touch display module, thereby improving the visual effect of the touch display module.

[0010] In one possible implementation, the anti-peeping layer further 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 including a plurality of second electrodes extending along a second direction, each second electrode being a strip electrode, with a gap between two adjacent second electrodes, and the second direction intersecting with the first direction; a plurality of third electrodes, each third electrode being located within an area defined by the intersection of the plurality of first electrodes and the plurality of second electrodes; and a plurality of switching tubes, the gate of each switching tube being connected to the second electrode, the first electrode of each switching tube being connected to the first electrode, and the second electrode of each switching tube being connected to the third electrode. Multiple switching tubes located in the same row in the second direction are connected to the same second electrode, and multiple switching tubes located in the same row in the first direction are connected to the same first electrode. Each switching tube is configured to disconnect during the touch control phase to control the third electrode to which it is connected 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.

[0011] In one 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. Thus, by disposing the third electrodes in the same layer as the first electrodes, the thickness of the privacy protection layer can be reduced, thereby reducing the thickness of the touch display module.

[0012] In one possible implementation, the second electrode layer and the first electrode layer are disposed in separate layers, an insulating layer is disposed 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 that is close to the dimming film layer. Thus, by disposing the 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. Furthermore, by disposing the first electrode layer on a side of the second electrode layer that is close to the dimming film layer, the first electrode layer is brought closer to the dimming film layer, allowing the voltage signal applied to the first electrode to control the dimming film layer to exhibit 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.

[0013] In one possible implementation, each switch 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, the first electrode, and the second electrode. The gate and the second electrode are provided on the same layer, and the first electrode and the second electrode are provided on the same layer as the first electrode. This reduces the thickness of the touch display module.

[0014] In one possible implementation, the first electrode layer is located on the side of the dimming film layer away from the display panel, or the first electrode layer is located on the side of the dimming film layer close to the display panel. This provides an implementation method of providing the first electrode layer on a single side of the dimming film layer.

[0015] In one 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 to, when the first voltage signal and the second voltage signal are applied to the two adjacent first electrodes in each first electrode group, present a light-shielding state; and when the third voltage signal is applied to the two adjacent first electrodes in each first electrode group, present a light-transmitting state. 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 multiple first electrodes in the first electrode layer. This can reduce the thickness of the anti-peep layer, thereby reducing the thickness of the touch display module, and can reduce the process complexity of the touch display module.

[0016] In one possible implementation, 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. The third electrode layer includes a plurality of fourth electrodes extending along the first direction, each fourth electrode being a strip-shaped electrode, and a gap exists 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 be in a light-transmitting state or a light-shielding state by using 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, thereby reducing the shielding effect of the third electrode layer on the touch electrodes in the touch layer, allowing the touch display module to perform touch functions normally.

[0017] In one possible implementation, the plurality of fourth electrodes are divided into a plurality of second electrode groups, each second electrode group including two adjacent fourth electrodes. The dimming film layer is further configured to present a light-shielding state when a first voltage signal and a second voltage signal are applied to the two adjacent fourth electrodes in each second electrode group, respectively; and present a light-transmitting state when a third voltage signal is applied to the two adjacent fourth electrodes in each second electrode group or when no voltage signal is applied to the two adjacent fourth electrodes. For the first electrode and the fourth electrode whose orthographic projections on the display panel overlap, 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. 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, thereby improving the anti-peeping display effect of the touch display module.

[0018] In one possible implementation, the dimming film layer is specifically configured to exhibit 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 exhibit 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, fifth, sixth, and seventh voltage signals are all DC voltage signals; the voltage difference between the fourth and fifth voltage signals is greater than a second voltage threshold, the voltage difference between the sixth and seventh voltage signals is less than a 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 exhibit a light-transmitting state or a light-shielding state by a vertical electric field between the first electrode in the first electrode layer and the fourth electrode in the third electrode layer.

[0019] In one possible implementation, the third electrode layer further includes a plurality of second dummy electrodes, which are disposed in the same layer as the fourth electrode, and each second dummy electrode is located in a gap between two adjacent fourth electrodes; wherein the transmittance of the second dummy electrode is the same as the transmittance of the fourth electrode. Thus, by disposing the second dummy electrodes in the third electrode layer, when the dimming film layer is in a light-transmitting state, the transmittance at the location of the fourth electrode is consistent with the transmittance at the location of the second dummy electrodes, thereby reducing the brightness difference between the touch display module at the location of the fourth electrode and the gap between two adjacent fourth electrodes, thereby improving the visual effect of the touch display module.

[0020] In one possible implementation, the privacy protection 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 second electrode control layer comprises a layer structure identical to that of 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. Thus, when the touch display module is operating in the display phase, the second electrode control layer can further enhance the privacy protection of the touch display module. Furthermore, when the touch display module is operating in the touch phase, the switch transistor in the second electrode control layer can be controlled to be disconnected, causing the electrode connected to the switch transistor in the second electrode control layer to be suspended, thereby reducing the shielding effect on the touch electrodes in the touch layer.

[0021] In one 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 electrodes in the touch layer can be reduced.

[0022] In a possible implementation, the dimming film layer includes a polymer dispersed liquid crystal layer or an electrochromic layer.

[0023] In one possible implementation, the electrochromic layer includes multiple electrochromic portions extending along a third direction. Each electrochromic portion is arranged in a strip shape, with gaps between adjacent electrochromic portions. The third direction intersects the first direction. Thus, by patterning the electrochromic layer, the electrochromic layer includes multiple electrochromic portions spaced apart, thereby improving the privacy protection of the touch display module.

[0024] In one possible implementation, the first electrode is made of a transparent conductive material; or the first electrode includes multiple metal grids. This reduces the amount of light blocked by the first electrode from the display panel when the touch display module is in non-privacy protection mode, thereby improving the display brightness of the touch display module.

[0025] In one possible implementation, the privacy layer further includes a first substrate and a second substrate, the first substrate being located on the side of the dimming film layer away from the first electrode layer, and the second substrate being located on the 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 the side of the polarizer away from the display panel; the second adhesive layer is located on the side of the privacy layer away from the display panel; and the cover plate is located on the 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 below it.

[0026] 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.

[0027] The possible implementation methods of the second aspect have effects similar to those of the first aspect and the possible designs of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the three-dimensional structure of an electronic device provided in an embodiment of the present application;

[0029] FIG2 is a schematic diagram of the exploded structure of the electronic device shown in FIG1 ;

[0030] FIG3 is a cross-sectional schematic diagram of a first touch display module provided by an embodiment of the present application, in which an anti-peeping layer is located above a touch layer;

[0031] FIG4 is a schematic top view of the anti-peeping layer in the touch display module shown in FIG3 ;

[0032] FIG5 is a cross-sectional schematic diagram of a second touch display module provided by an embodiment of the present application, in which an anti-peeping layer is located above a touch layer;

[0033] FIG6 is a cross-sectional schematic diagram of a third touch display module provided by an embodiment of the present application, in which the privacy protection layer is located above the touch layer;

[0034] FIG7 is a cross-sectional schematic diagram of a fourth touch display module provided by an embodiment of the present application, in which the privacy protection layer is located above the touch layer;

[0035] FIG8 is a schematic top view of the anti-peeping layer in the touch display module shown in FIG7 ;

[0036] FIG9 is a cross-sectional schematic diagram of a fifth touch display module provided by an embodiment of the present application, in which the privacy protection layer is located above the touch layer;

[0037] FIG10 is a graph showing a relationship between a touch signal ratio and a distance between two adjacent first electrodes in a first electrode layer according to an embodiment of the present application;

[0038] FIG11 is a schematic structural diagram of a touch electrode provided in an embodiment of the present application;

[0039] FIG12 is a schematic structural diagram of another touch electrode provided in an embodiment of the present application;

[0040] FIG13 is a schematic structural diagram of another touch electrode provided in an embodiment of the present application;

[0041] FIG14 is a cross-sectional diagram of a first touch display module in which electrodes in an anti-peep layer are reused as touch electrodes according to an embodiment of the present application;

[0042] FIG15 is a schematic top view of the anti-peeping layer in the touch display module shown in FIG14 ;

[0043] FIG16 is a cross-sectional schematic diagram of a second touch display module in which electrodes in the privacy protection layer are reused as touch electrodes according to an embodiment of the present application;

[0044] FIG17 is a cross-sectional schematic diagram of a third touch display module in which electrodes in the privacy protection layer are reused as touch electrodes according to an embodiment of the present application;

[0045] FIG18 is a cross-sectional schematic diagram of a fourth touch display module in which electrodes in the privacy protection layer are reused as touch electrodes according to an embodiment of the present application;

[0046] FIG19 is a schematic top view of the anti-peeping layer in the touch display module shown in FIG18 ;

[0047] FIG20 is a 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 according to an embodiment of the application;

[0048] FIG21 is another 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 according to an embodiment of the present application;

[0049] FIG22 is a cross-sectional schematic diagram of a first touch display module provided by an embodiment of the present application, in which the privacy protection layer is located below the touch layer;

[0050] FIG23 is a cross-sectional schematic diagram of a second touch display module provided by an embodiment of the present application, in which the privacy protection layer is located below the touch layer;

[0051] FIG24 is a cross-sectional schematic diagram of a third touch display module provided by an embodiment of the present application, in which the privacy protection layer is located below the touch layer;

[0052] FIG25 is a cross-sectional schematic diagram of a fourth touch display module provided by an embodiment of the present application, in which the anti-peeping layer is located below the touch layer. DETAILED DESCRIPTION

[0053] 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 between identical or similar items with substantially the same functions and effects. For example, the first chip and the second chip are merely used to distinguish different chips and do not limit their order. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean that they are different.

[0054] It should be noted that in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0055] In the embodiments of the present application, "at least one" refers to one or more, and "more" 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: the existence of A alone, the existence of A and B at the same time, and the existence of B 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 items" or similar expressions refers to any combination of these items, including any combination of single items 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.

[0056] With the continuous development of electronic technology, electronic devices with touch functions have gradually become common tools in people's daily lives and work. In recent years, users have also paid more and more attention to the protection of personal privacy. However, some electronic devices have a wide viewing angle range and lack anti-peeping effect. As a result, when users use electronic devices in public places such as subways, buses, and high-speed trains, the information they browse may be viewed by others, which can easily lead to the leakage of personal privacy.

[0057] 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.

[0058] The privacy film can be a Venetian blind film, which uses the optical privacy protection principle of Venetian blinds. Through a parallel arrangement of grating structures (i.e., Venetian blinds), the light emitted by the electronic device can only be emitted from a certain angle range. Light at other angles will be blocked by the grating structure, thereby reducing the viewing angle range of the electronic device to achieve a privacy protection effect. The viewing angle range refers to the angle range in which the user can clearly view the information displayed by the electronic device from different directions.

[0059] Although this method of attaching an anti-peep film to the screen surface of an electronic device is simple and convenient to operate, due to the poor transmittance of the anti-peep film, it will reduce the clarity of the electronic device screen and the screen will have obvious graininess, thereby affecting the visual effect of the electronic device when displaying; moreover, the method of attaching an anti-peep film to the screen surface of an electronic device cannot enable the electronic device to switch between anti-peep mode and non-anti-peep mode.

[0060] Based on this, embodiments of the present application provide a touch display module and electronic device, the touch display module comprising 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, and the anti-peeping layer is 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, which are stacked sequentially in the thickness direction of the display panel. The first electrode layer comprises a plurality of first electrodes extending along a first direction, each first electrode being a strip-shaped electrode, and a gap exists between two adjacent first electrodes. The dimming film layer is configured to exhibit a light-transmitting state or a light-shielding state under at least the action of a 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 a non-spying mode. When the dimming film layer is in the light-shielding state, the touch display module is in an anti-peeping mode.

[0061] In this way, by providing 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, that is, the first electrode layer is patterned, so as to reduce the shielding effect of the first electrode layer on the touch electrodes in the touch layer, so that the touch display module can normally realize the touch function.

[0062] Furthermore, the embodiment of the present application, which provides an anti-privacy layer on the side of the touch layer away from the display panel, does not significantly affect the transmittance of the touch display module, compared to the related art method of attaching an anti-privacy film to the screen surface of the electronic device. This does not significantly reduce the clarity of the electronic device screen and can reduce the graininess of the screen, thereby improving the visual effect of the electronic device display. Furthermore, the embodiment of the present application provides an anti-privacy layer on the side of the touch layer away from the display panel, and the first electrode layer in the anti-privacy layer can control the dimming film layer to present a light-transmitting state or a light-blocking state, allowing the touch display module to switch between non-privacy mode and privacy mode.

[0063] Figure 1 is a schematic diagram of the three-dimensional structure of an electronic device provided in an embodiment of the present application, and Figure 2 is a schematic diagram of the exploded structure of the electronic device shown in Figure 1. Referring to Figures 1 and 2, taking a mobile phone as an example, the electronic device can include a touch display module 10 and a housing 20, with the touch display module 10 being mounted on the housing 20.

[0064] 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 enable the touch display module 10 to be mounted on the housing 20. Furthermore, a cavity is formed between the middle frame 21 and the back cover 22 for accommodating electronic components such as a battery, camera module, main board, and sub-board (not shown in Figure 2).

[0065] In some embodiments, the middle frame 21 and back cover 22 can be integrally formed to enhance the compactness of the electronic device and reduce the possibility of damage to the electronic components within the electronic device due to the detachment of the back cover 22 when the electronic device is dropped. In other embodiments, the middle frame 21 and back cover 22 can also be detachably connected to facilitate the repair or replacement of electronic components such as batteries and circuit boards within the electronic device, thereby increasing the flexibility of the electronic device.

[0066] The touch display module 10 is used to implement touch and display functions. The touch display module 10 may include a display panel, which may be a liquid crystal display (LCD) panel, an organic light-emitting diode (OLED) display panel, 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.

[0067] It is understandable that the electronic devices in the embodiments of the present application may also be tablet computers (Pads), laptop computers, smart TVs, wearable devices (such as smart watches, smart bracelets, etc.), e-book readers, personal computers (PCs), personal digital assistants (PDAs), vehicle-mounted devices, financial devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, 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 devices.

[0068] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be implemented independently or in combination with each other. For the same or similar concepts or processes, some embodiments may not be described in detail.

[0069] For example, Figure 3 is a cross-sectional schematic diagram of a first touch display module according to an embodiment of the present application, in which a privacy layer is located above a touch layer. Figure 4 is a top view schematic diagram of the privacy layer in the touch display module shown in Figure 3. As shown in Figure 3, the touch display module 10 includes a display panel 110, a touch layer 120, a privacy layer 130, and a cover plate 140.

[0070] In some embodiments, the display panel 110 may be an OLED display panel, which may include 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.

[0071] The substrate may be a rigid substrate, such as a glass substrate; or, the substrate may be a flexible substrate, such as a polyimide (PI) substrate or a polyethylene terephthalate (PET) substrate.

[0072] 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.

[0073] The anode layer is arranged on the side of the driving circuit layer away from the base substrate. The material of the anode layer can be a conductive material with high reflectivity, such as aluminum, silver, copper, titanium or other metal materials or alloy materials.

[0074] The pixel definition layer is disposed on a side of the driving circuit layer away from the base substrate. Specifically, the pixel definition layer can cover the driving circuit layer and a portion of the anode layer. The pixel definition layer has a plurality of pixel openings for defining sub-pixels, and each pixel opening can expose a portion of the anode layer.

[0075] The light-emitting layer is located within the pixel openings in the pixel defining layer and can be formed within the pixel openings in the pixel defining layer using an inkjet printing process or an evaporation process. 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. Alternatively, the light-emitting layer can include only an organic material layer, which can be an organic electroluminescent material.

[0076] 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).

[0077] The encapsulation layer is located on the side of the cathode layer away from the base substrate. The encapsulation layer may include a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer arranged in a stacked manner, and the first inorganic encapsulation layer, the organic encapsulation layer and the second inorganic encapsulation layer are arranged in sequence 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 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.

[0078] 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.

[0079] In other embodiments, the display panel 110 may be an LCD display panel, in which 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.

[0080] The first polarizer is located on 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.

[0081] The array substrate and color filter substrate are arranged in a cell-like configuration, with the liquid crystal layer sandwiched between them. The array substrate includes multiple transistors and pixel electrodes 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 multiple color resists arranged in an array, such as red, blue, and green. A black matrix is ​​placed between each adjacent color resist.

[0082] The transistors in the array substrate are used to provide pixel voltages to the pixel electrodes connected to them. 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.

[0083] The second polarizer is located on the light-emitting side of the display panel 110, that is, on the side of the color filter substrate away from the liquid crystal layer. The second polarizer is used to interpret polarized light modulated by the liquid crystal molecules. For example, light with the same polarization direction as the second polarizer can pass through the second polarizer, thereby creating a contrast between light and dark on the display panel 110 and displaying an image.

[0084] As shown in Figure 3, touch layer 120 is located on the light-emitting side of display panel 110. Specifically, if display panel 110 is an OLED display panel, touch layer 120 is located on the side of the encapsulation layer away from the base substrate. If display panel 110 is an LCD display panel, touch layer 120 is located on the side of the second polarizer away from the array substrate. Touch layer 120 is used to detect the user's touch position.

[0085] 3 , the privacy layer 130 is located on a side of the touch layer 120 away from the display panel 110 . The privacy 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 .

[0086] In some embodiments, the light-adjusting film layer 131 includes a polymer dispersed liquid crystal layer or an electrochromic layer.

[0087] 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.

[0088] For example, a negative PDL layer is used. When the voltage difference applied to the PDL layer is greater than a first preset value, the PDL layer enters a scattering state, also known as a foggy state. When the voltage difference applied to the PDL layer is less than a second preset value, the PDL layer enters a transparent state. The first and second preset values ​​may be equal or unequal.

[0089] Taking a positive polymer dispersed liquid crystal layer 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.

[0090] 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 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 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.

[0091] It should be noted that since the polymer dispersed liquid crystal layer is not easy to pattern, the embodiments of the present application can pattern the electrodes that apply voltage to the polymer dispersed liquid crystal layer. Taking the example of providing 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 the polymer dispersed liquid crystal between the patterned electrodes on both sides that is in a scattering state, while the polymer dispersed liquid crystal at other locations can be in a transparent state. In this case, the polymer dispersed liquid crystal between the patterned electrodes on both sides can scatter light emitted by the display panel 110, while the polymer dispersed liquid crystal at other locations can transmit light emitted by the display panel 110. As a result, users within the viewing angle range see a transparent image (i.e., they can clearly see the information displayed by the touch display module 10), while viewers outside the viewing angle range see a fogged image (i.e., they cannot clearly see the information displayed by the touch display module 10). At this time, the touch display module 10 is in anti-peeping mode to achieve anti-peeping display. When the polymer dispersed liquid crystal layer is in a transparent state, it is actually that the polymer dispersed liquid crystal between the patterned electrodes on both sides and the polymer dispersed liquid crystal at other positions are all transparent. 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.

[0092] 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, thereby switching the touch display module 10 between the anti-peeping mode and the non-anti-peeping mode.

[0093] In the case where the dimming film layer 131 includes an electrochromic (EC) layer, the material of the EC layer includes an electrochromic material.

[0094] Electrochromism refers to the phenomenon in which a material's optical properties (such as reflectivity, transmittance, and absorptivity) undergo a stable, reversible color change under the influence of an applied electric field. This is manifested in a reversible change in color and transmittance. Materials exhibiting electrochromic properties are called electrochromic materials.

[0095] Electrochromic materials may include inorganic metal oxides. For example, the electrochromic material may include 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). Alternatively, the electrochromic material may be any of the above inorganic metal oxides doped with lithium, sodium, potassium, vanadium, or titanium, or a mixture of multiple inorganic metal oxides doped with lithium, sodium, potassium, vanadium, or titanium. The above 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.

[0096] The electrochromic material may also include an organic electrochromic material. For example, the electrochromic material may be one or more of polythiophenes and their derivatives, viologens, tetrathiafulvalene, metal phthalocyanine compounds, and the like.

[0097] When the voltage difference applied to the electrochromic layer is greater than a 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 a fourth preset value, the color of the electrochromic material in the electrochromic layer becomes transparent. The third and fourth preset values ​​may be equal or different.

[0098] 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.

[0099] 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.

[0100] In one possible implementation, the dimming film layer 131 includes an electrochromic layer. As shown in FIG4 , the electrochromic layer includes multiple electrochromic portions 1311 extending along a third direction. Each electrochromic portion 1311 is arranged in a strip shape, and a gap exists between adjacent electrochromic portions 1311. For example, the third direction may be the Y direction shown in FIG4 .

[0101] In this way, when the light-adjusting film layer 131 includes an electrochromic layer, the electrochromic layer is patterned so that the electrochromic layer includes a plurality of electrochromic portions 1311 that are spaced apart.

[0102] Therefore, when the electrochromic layer is in an opaque state, it is actually the electrochromic portions 1311 in the electrochromic layer that are opaque, while the gaps between adjacent electrochromic portions 1311 are normally transparent, causing the electrochromic layer to exhibit a grating state as shown in FIG4 . In this case, when light emitted by the display panel 110 enters the electrochromic layer, light with a wide viewing angle is blocked by the electrochromic portions 1311, and only light with a narrow viewing angle can pass through and exit normally. This reduces the viewing angle range of the touch display module 10, preventing viewers outside the viewing angle range from seeing the displayed image. At this point, the touch display module 10 is in anti-peeping mode, achieving an anti-peeping display.

[0103] When the electrochromic layer is transparent, it is actually the electrochromic portions 1311 within the electrochromic layer that are transparent. The electrochromic portions 1311 can transmit light normally, and the gaps between adjacent electrochromic portions 1311 can also transmit light normally. In this case, light emitted by the display panel 110 is not blocked by the electrochromic layer when entering it. The touch display module 10 is now in non-privacy protection mode, achieving normal display.

[0104] 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.

[0105] As shown in Figure 4, the first electrode layer 132 includes multiple first electrodes 1321 extending along a first direction. Each first electrode 1321 is a strip-shaped electrode, and gaps exist between adjacent first electrodes 1321. The dimming film layer 131 is configured to exhibit a light-transmitting state or a light-shielding state under at least the voltage applied by the multiple first electrodes 1321. When the dimming film layer 131 is in the light-transmitting state, the touch display module 10 is in a non-privacy mode; when the dimming film layer 131 is in the light-shielding state, the touch display module 10 is in a privacy mode.

[0106] The first direction intersects the third direction. The first direction may be the X direction shown in Figure 4, and the third direction may be the Y direction shown in Figure 4. In some embodiments, the third direction is perpendicular to the first direction.

[0107] In one embodiment, the first direction may be the row direction of the display panel 110, i.e., the first electrode layer 132 includes a plurality of first electrodes 1321 extending along the row direction of the display panel 110; and the third direction may be the column direction of the display panel 110, i.e., the electrochromic layer includes a plurality of electrochromic portions 1311 extending along the column direction of the display panel 110. In this embodiment, left and right privacy protection of the touch display module 10 can be achieved.

[0108] In another embodiment, the first direction may be the column direction of the display panel 110, i.e., the first electrode layer 132 includes a plurality of first electrodes 1321 extending along the column direction of the display panel 110; and the third direction may be the row direction of the display panel 110, i.e., the electrochromic layer includes a plurality of electrochromic portions 1311 extending along the row direction of the display panel 110. In this embodiment, top and bottom privacy protection can be achieved for the touch display module 10.

[0109] 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. Furthermore, because the first electrode layer 132 in the anti-peeping layer 130 includes a plurality of first electrodes 1321 extending along a first direction, and a gap exists between two adjacent first electrodes 1321, the first electrode layer 132 is patterned 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.

[0110] It should be noted that the extension direction of the first electrode 1321 is the first direction, and the extension direction of the electrochromic portion 1311 is the third direction, and the third direction intersects 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 (i.e., 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 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 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.

[0111] 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.

[0112] In one case, the first electrode 1321 may be formed of a transparent conductive material, and the transparent conductive material may be ITO or IZO.

[0113] In another embodiment, the first electrode 1321 may include multiple metal grids, which may be formed by multiple metal lines intersecting each other. Since the metal grids are normally light-transmissive, they do not affect the display effect of the touch display module 10 in the anti-peeping mode and the non-anti-peeping mode.

[0114] The metal mesh may be made of a single metal or a metal alloy, for example, silver (Ag), copper (Cu), aluminum (Al), or aluminum-niobium alloy (AlNb). The shape of the metal mesh may be rectangular, diamond, triangular, pentagonal, hexagonal, or circular, and is not limited in this embodiment of the present application.

[0115] In one possible implementation, as shown in FIG4 , the first electrode layer 132 further includes a plurality of first dummy electrodes 1322 . The first dummy electrodes 1322 are disposed in the same layer as the first electrodes 1321 , and each first dummy electrode 1322 is located in a gap between two adjacent first electrodes 1321 . The first dummy electrodes 1322 may also be referred to as first dummy electrodes.

[0116] By disposing the first dummy electrode 1322 and the first electrode 1321 in the same layer, the thickness of the privacy protection layer 130 can be reduced, thereby reducing the thickness of the touch display module 10 .

[0117] Since each first dummy electrode 1322 is located in the gap between two adjacent first electrodes 1321 , the orthographic projection of the first dummy electrode 1322 on the display panel 110 does not overlap with the orthographic projection of the first electrode 1321 on the display panel 110 .

[0118] The transmittance of the first dummy electrode 1322 is the same as the transmittance of the first electrode 1321. In some embodiments, the material of the first dummy electrode 1322 and the material of the first electrode 1321 can be the same, so that the transmittance of the first dummy electrode 1322 is the same as the transmittance of the first electrode 1321. For example, the first dummy electrode 1322 and the first electrode 1321 are both made of a transparent conductive material such as ITO or IZO.

[0119] For example, if both the first dummy electrode 1322 and the first electrode 1321 are made of ITO, since the transmittance of ITO is generally around 90%, if the first dummy electrode 1322 is not provided in the gap between two adjacent first electrodes 1321, then when the dimming film layer 131 is in a light-transmitting state, the transmittance at the location of the first electrode 1321 will differ 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.

[0120] It should be understood that FIG4 shows that two rows of first virtual electrodes 1322 are set 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 the embodiment of the present application does not limit this. In addition, the positive projection shape of the first virtual electrode 1322 on the display panel 110 can be a rectangle as shown in FIG4, or a diamond, triangle, pentagon, hexagon or circle, etc., and the embodiment of the present application does not limit this. In addition, the first virtual electrode 1322 and the first electrode 1321 can be formed using the same composition process to simplify the production process of the first virtual electrode 1322 and the first electrode 1321 and reduce the process complexity.

[0121] 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 this is to reduce the brightness difference between the touch display module 10 at the position where the first electrode 1321 is located and the gap between the two adjacent first electrodes 1321.

[0122] 3 , the cover plate 140 is located on a side of the privacy layer 130 away from the display panel 110. Specifically, the cover plate 140 is located on a 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.

[0123] It can be understood that the cross-sectional view obtained along the cross-sectional view AA′ shown in FIG. 4 may be the touch display module 10 shown in FIG. 3 .

[0124] For example, Figure 5 is a cross-sectional schematic diagram of a second touch display module according to an embodiment of the present application, wherein the privacy layer is located above the touch layer. As shown in Figure 5 , the touch display module 10 includes a display panel 110, a touch layer 120, a polarizer 150, a first adhesive layer 160, a privacy layer 130, a second adhesive layer 170, and a cover plate 140.

[0125] The touch layer 120 is located on 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. 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.

[0126] As shown in Figure 5, polarizer 150 and first adhesive layer 160 are located between touch layer 120 and privacy layer 130, with first adhesive layer 160 located on the side of polarizer 150 away from display panel 110. Polarizer 150 is used to block reflection of external light to improve the contrast of touch display module 10. First adhesive layer 160 can be an optically clear adhesive (OCA) layer.

[0127] As shown in Figure 5, the privacy protection 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 arranged in this order away from the display panel 110 along the thickness direction of the display panel 110. The first substrate 133 is located on the side of the dimming film layer 131 away from the first electrode layer 132, and the second substrate 134 is located on the side of the first electrode layer 132 away from the dimming film layer 131.

[0128] As shown in FIG5 , the second adhesive layer 170 is located on the side of the privacy 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.

[0129] For example, Figure 6 is a cross-sectional view of a third touch display module according to an embodiment of the present application, in which a privacy layer is located above a touch layer. As shown in Figure 6 , 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, a privacy layer 130, a second adhesive layer 170, and a cover plate 140.

[0130] 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.

[0131] As shown in FIG6 , 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.

[0132] As shown in FIG. 6 , 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 .

[0133] As shown in FIG6 , the privacy protection 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 arranged in this order away from the display panel 110 along the thickness direction of the display panel 110. The first substrate 133 is located on the side of the dimming film layer 131 away from the first electrode layer 132, and the second substrate 134 is located on the side of the first electrode layer 132 away from the dimming film layer 131.

[0134] 6 , the second adhesive layer 170 is located on a side of the privacy protection 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 .

[0135] It should be noted that the difference between the touch display module 10 shown in Figure 5 and the touch display module 10 shown in Figure 6 is that the touch layer 120 in the touch display module 10 shown in Figure 5 can be directly manufactured on the light-emitting surface of the display panel 110, while the touch layer 120 in the touch display module 10 shown in Figure 6 is manufactured separately and bonded to the light-emitting surface of the display panel 110 through the third adhesive layer 180.

[0136] It can be understood that the cross-sectional view obtained along the cross-sectional view AA′ shown in FIG. 4 may be the touch display module 10 shown in FIG. 5 or FIG. 6 .

[0137] For example, Figure 7 is a cross-sectional schematic diagram of a fourth touch display module provided by an embodiment of the present application, in which a privacy protection layer is located above a touch layer. Figure 8 is a top-down schematic diagram of the privacy protection layer in the touch display module shown in Figure 7 . As shown in Figure 7 , the touch display module 10 includes: a display panel 110, a touch layer 120, a polarizer 150, a first adhesive layer 160, an privacy protection layer 130, a second adhesive layer 170, and a cover plate 140.

[0138] The touch layer 120 is located on 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. 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.

[0139] As shown in Figure 7, the polarizer 150 and the first adhesive layer 160 are located between the touch layer 120 and the privacy layer 130, with the first adhesive layer 160 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.

[0140] As shown in FIG7 , 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 the side of the dimming film layer 131 away from the display panel 110.

[0141] As shown in FIG. 7 and FIG. 8 , the first electrode control layer includes a second electrode layer 135 , a plurality of third electrodes 136 and a plurality of switching tubes 137 .

[0142] The first electrode layer 132 includes a plurality of first electrodes 1321 extending along a first direction, each first electrode 1321 being a strip-shaped electrode, with a gap 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 being a strip-shaped electrode, with a gap between two adjacent second electrodes 1351. The second direction intersects the first direction.

[0143] For example, the first direction may be the X direction shown in FIG8 , and the second direction may be the Y direction shown in FIG8 . 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 the Y direction shown in FIG8 .

[0144] 8 , each third electrode 136 is located within a region defined by the intersection of the plurality of first electrodes 1321 and the 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.

[0145] As shown in FIG8 , the switches 137 are provided in a one-to-one correspondence with the third electrodes 136. The gate of each switch 137 is connected to the second electrode 1351, the first electrode of each switch 137 is connected to the first electrode 1321, and the second electrode of each switch 137 is connected to the third electrode 136. Furthermore, each switch 137 is configured to be disconnected during the touch phase to control the connected third electrode 136 to be in a suspended state, which may also be referred to as a floating state.

[0146] The touch display module 10 can work alternately in the display stage and the touch stage. When working in the display stage, the touch display module 10 is used to drive the display panel 110 to display the image. When working in the touch stage, the touch display module 10 is used to control the touch layer 120 to perform touch detection.

[0147] In an embodiment of the present application, when the touch display module 10 is operating 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, thereby reducing the shielding effect of the third electrode 136 on the touch electrode in the touch layer 120.

[0148] When the touch display module 10 is operating in the display stage, the voltage signal applied to the second electrode 1351 can be controlled to control the switch tube 137 to be turned on. 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, thereby further improving the anti-peeping effect of the touch display module 10.

[0149] In some embodiments, as shown in FIG8 , multiple switching transistors 137 located in the same row in the second direction are connected to the same second electrode 1351, and multiple switching transistors 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. Thus, multiple switching transistors 137 located in the same column are connected to the same second electrode 1351, and multiple switching transistors 137 located in the same row are connected to the same first electrode 1321.

[0150] 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 electrodes 136 and the first electrodes 1321 in the same layer, the thickness of the privacy protection layer 130 can be reduced, thereby reducing the thickness of the touch display module 10.

[0151] The third electrode 136 and the first electrode 1321 can be manufactured using the same patterning process to simplify the manufacturing process of the third electrode 136 and the first electrode 1321 and reduce process complexity. Furthermore, the material of the third electrode 136 can be the same as that of the first electrode 1321. Furthermore, the orthographic projection shape of the third electrode 136 on the display panel 110 can be a rectangle as shown in FIG8 , or it can be a diamond, triangle, pentagon, hexagon, or circle, etc., which is not limited in this embodiment of the present application.

[0152] 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.

[0153] Since the voltage signal applied to the second electrode 1351 is used to control the switching transistor 137 to be turned on or off, and the voltage signal applied to the first electrode 1321 is used to control the light-transmitting state or the light-blocking state of the dimming film layer 131, 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 provided in separate layers, and an insulating layer is provided between the second electrode layer 135 and the first electrode layer 132.

[0154] In addition, by setting 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.

[0155] It should be noted that the switch tube 137 shown in FIG8 is represented by a transistor circuit symbol, which does not represent the actual layout structure of the switch tube 137 in the anti-peep layer 130. In fact, the switch tube 137 can be manufactured by multiple film layer structures.

[0156] As shown in FIG7 , each switching transistor 137 includes an active layer 1371, a gate 1372, a first electrode 1373, and a second electrode 1374. A first insulating layer 1375 is disposed between the active layer 1371 and the gate 1372, and a second insulating layer 1376 is disposed 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, depending on the actual product.

[0157] Specifically, the active layer 1371 is located on the 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 the side of the first insulating layer 1375 close to the display panel 110; and 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 the side of the second insulating layer 1376 close to the display panel 110, and are connected to the active layer 1371 via vias penetrating the second insulating layer 1376 and the first insulating layer 1375, respectively.

[0158] The gate 1372 and the second electrode 1351 are disposed in the same layer to reduce the thickness of the touch display module 10. Furthermore, 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 process complexity.

[0159] The first electrode 1373 and the second electrode 1374 are disposed in the same layer as the first electrode 1321 to reduce the thickness of the touch display module 10. Furthermore, the first electrode 1373, the second electrode 1374, and the first electrode 1321 can be manufactured using the same patterning process, thereby simplifying the manufacturing process of the first electrode 1373, the second electrode 1374, and the first electrode 1321 and reducing process complexity.

[0160] When the gate 1372 and the second electrode 1351 are provided in the same layer, and the first electrode 1373 and the second electrode 1374 are provided in 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 .

[0161] Of course, in other embodiments, the gate 1372 and the second electrode 1351 may also be provided 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 provided in different layers.

[0162] It is understood that the cross-sectional view along section BB' shown in FIG8 may be the touch display module 10 shown in FIG7. Moreover, the specific film structure of the switch tube 137 in the touch display module 10 includes but is not limited to the film structure of the switch tube 137 shown in FIG7.

[0163] 3 , 5 , 6 , and 7 , the touch display module 10 shows that the first electrode layer 132 is located on the side of the dimming film layer 131 away from the display panel 110 . Alternatively, the first electrode layer 132 may be located on the side of the dimming film layer 131 closer to the display panel 110 .

[0164] 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 a single 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.

[0165] Specifically, the plurality of first electrodes 1321 are divided into a plurality of first electrode groups, each of which includes two adjacent first electrodes 1321. The dimming film layer 131 is specifically configured to present a light-shielding state when a first voltage signal and a second voltage signal are applied to the two adjacent first electrodes 1321 in each first electrode group, respectively; and present a light-transmitting state when a third voltage signal is applied to both adjacent first electrodes 1321 in each first electrode group, or when no voltage signal is applied to both adjacent first electrodes 1321.

[0166] The first voltage signal, the second voltage signal, and the third voltage signal are all DC voltage signals, and the voltage difference between the first voltage signal and the second voltage signal is greater than a first voltage threshold. The first voltage threshold can be set according to actual conditions.

[0167] When the touch display module 10 is in the anti-peep mode, a first voltage signal and a second voltage signal can be applied to two adjacent first electrodes 1321 in each first electrode group, respectively, so that there is a voltage difference between the 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.

[0168] 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 numerical value corresponding to the voltage of the first voltage signal and the numerical value corresponding to the voltage of the second voltage signal are the inverse of 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.

[0169] 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 .

[0170] When the touch display module 10 is in the non-privacy protection mode, a third voltage signal can be applied to both adjacent first electrodes 1321 in each first electrode group, or no voltage signal can be applied to both adjacent first electrodes 1321 in each first electrode group, so that there is no voltage difference between the two adjacent first electrodes 1321 in each first electrode group, thereby controlling the dimming film layer 131 to be in a light-transmitting state. For example, the voltage of the third voltage signal can be 0V or 1.5V.

[0171] Therefore, in the embodiment of the present application, a 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 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. 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.

[0172] Furthermore, with respect to the touch display module 10 shown in FIG7 , when the touch display module 10 is in anti-peeping mode, in addition to applying the first and second voltage signals to 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 conduction of the switch 137. The voltage signal applied to the first electrode 1321 can then be written to the third electrode 136 via the turned-on switch 137, so that the voltage signal applied to the third electrodes 136 in the same row is either the first or second voltage signal, and one of any two adjacent rows of third electrodes 136 is applied with the first voltage signal and the other with the second voltage signal. In this way, a voltage difference exists between the two adjacent first electrodes 1321 in each first electrode group, forming a parallel electric field, and a voltage difference also exists between any two adjacent rows of third electrodes 136, forming a parallel electric field, thereby controlling the dimming film layer 131 to exhibit a light-shielding state.

[0173] With respect to the touch display module 10 shown in FIG7 , when the touch display module 10 is in non-privacy protection mode, in addition to applying a third voltage signal to 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 conduction of the switch tube 137. The voltage signal applied to the first electrode 1321 can then be written to the third electrode 136 via the turned-on switch tube 137, thereby applying a 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, thereby controlling the dimming film layer 131 to be in a light-transmitting state.

[0174] For example, Figure 9 is a cross-sectional schematic diagram of a fifth touch display module provided by an embodiment of the present application, wherein the privacy layer is located above the touch layer. As shown in Figure 9 , the touch display module 10 includes: a display panel 110, a touch layer 120, a polarizer 150, a first adhesive layer 160, a privacy layer 130, a second adhesive layer 170, and a cover plate 140.

[0175] The privacy protection 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 either side of the dimming film layer 131 in the thickness direction of the display panel 110.

[0176] 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-shaped electrode, and a gap exists 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.

[0177] 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, thereby reducing 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.

[0178] In one feasible manner, 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.

[0179] In some embodiments, the fourth electrode may be made of a transparent conductive material; or, the fourth electrode includes a plurality of metal grids.

[0180] Therefore, the anti-peeping 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, respectively, on either side of the dimming film layer 131. In one implementation, the dimming film layer 131 is controlled to exhibit a light-transmitting state or a light-shielding state by means of a parallel electric field between the multiple first electrodes 1321 in the first electrode layer 132 and a parallel electric field between the multiple fourth electrodes in the third electrode layer 138. In another implementation, the dimming film layer 131 is controlled to exhibit a light-transmitting state or a light-shielding state by means of a perpendicular electric field between the first electrodes 1321 in the first electrode layer 132 and the fourth electrodes in the third electrode layer 138.

[0181] In one implementation, when a parallel electric field is used to control the dimming film layer 131 to exhibit a light-transmitting state or a light-shielding state, the plurality of fourth electrodes are divided into a plurality of second electrode groups, each second electrode group including two adjacent fourth electrodes. The dimming film layer 131 is further configured to exhibit a light-shielding state when a first voltage signal and a second voltage signal are applied to two adjacent fourth electrodes in each second electrode group, respectively; and to exhibit a light-transmitting state when both adjacent fourth electrodes in each second electrode group are applied a third voltage signal or no voltage signal is applied.

[0182] Among them, for the first electrode 1321 and the fourth electrode whose orthographic projections on the display panel 110 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 the first voltage threshold.

[0183] When the touch display module 10 is in the anti-peep mode, the first voltage signal and the second voltage signal can be applied to the two adjacent first electrodes 1321 in each first electrode group, respectively, so that there is a voltage difference 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 applied to the two adjacent fourth electrodes in each second electrode group, respectively, so that there is a voltage difference 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.

[0184] 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 to both, so that there is no voltage difference between the 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 to both, so that there is no voltage difference between the two adjacent fourth electrodes in each second electrode group, thereby controlling the dimming film layer 131 to be in a light-transmitting state.

[0185] 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.

[0186] 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 fourth voltage signal and the fifth voltage signal is greater than the second voltage threshold, the voltage difference between the sixth voltage signal and 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.

[0187] 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.

[0188] For example, the fourth voltage signal may be a 1.5V DC voltage signal, and the fifth voltage signal may be a 0V DC voltage signal. Then, the voltage difference between the fourth voltage signal and the fifth voltage signal may be 1.5V.

[0189] 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.

[0190] 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 sixth voltage signal and 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 sixth voltage signal and the seventh voltage signal may be 0 V.

[0191] In some embodiments, the third electrode layer 138 further includes a plurality of second dummy electrodes, which are disposed in the same layer as the fourth electrodes and each second dummy electrode is located in a gap between two adjacent fourth electrodes. The second dummy electrodes may also be referred to as second dummy electrodes.

[0192] Since each second dummy electrode is located in the gap between two adjacent fourth electrodes, the orthographic projection of the second dummy electrode on the display panel 110 does not overlap with the orthographic projection of the fourth electrode on the display panel 110 .

[0193] 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 providing 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 is 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.

[0194] Furthermore, 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.

[0195] In other embodiments, the privacy protection 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 second electrode control layer has the same layer structure as 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.

[0196] That is, the second electrode control layer also includes a second electrode layer 135 , a plurality of third electrodes 136 , a plurality of switch tubes 137 and other film layer structures as shown in FIG. 7 and FIG. 8 , which will not be described in detail here.

[0197] When the touch display module 10 operates in the touch stage, the multiple switch transistors in the second electrode control layer can also be controlled to be in a suspended state to reduce the shielding effect on the touch electrodes in the touch layer 120 .

[0198] For example, FIG10 is a graph showing the relationship between the touch signal ratio and the distance between two adjacent first electrodes in the first electrode layer, as provided in an embodiment of the present application. Referring to FIG10 , the horizontal axis represents the distance (i.e., pitch) between two adjacent first electrodes 1321, which is actually the sum of the gap between the two adjacent first electrodes 1321 and the width W of the first electrode 1321, expressed in micrometers. The vertical axis represents the touch signal ratio, which is actually the ratio of the signal difference when the first electrodes 1321 shield the touch electrodes to the signal difference when the touch electrodes are not shielded. The signal difference is the difference between the signal between the touch sensing electrode and the touch driving electrode when a finger is not touching the touch electrode and the signal between the touch sensing electrode and the touch driving electrode when a finger is touching the touch electrode.

[0199] 10 takes the case where the width W of the first electrode 1321 is 20 micrometers as an example to test the corresponding relationship between the distance between two adjacent first electrodes 1321 and the ratio of the touch signal amount.

[0200] As can be seen from FIG. 10 , when the distance between two adjacent first electrodes 1321 is greater than or equal to 1000 microns, the touch signal ratio is greater than 0.8, indicating that the shielding effect of the first electrodes 1321 on the touch electrodes has been reduced to a relatively low level.

[0201] 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 microns. In this way, by properly setting the gap between two adjacent first electrodes 1321, the shielding effect of the first electrode layer 132 on the touch electrodes in the touch layer 120 can be reduced.

[0202] In the embodiment of the present application, the touch electrodes in the touch layer 120 may be mutual capacitance touch electrodes, wherein the touch layer 120 includes a first touch electrode layer 121 , a third insulating layer 122 , and a second touch electrode layer 123 .

[0203] In one implementation, as shown in Figure 11, 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-shaped 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-shaped electrodes. The first direction may be the X direction shown in Figure 11, and the second direction may be the Y direction shown in Figure 11, with the first direction and the second direction intersecting.

[0204] 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.

[0205] For example, the first touch electrodes 1211 are touch drive electrodes, and the second touch electrodes 1231 are touch sensing electrodes. A touch drive signal can be applied sequentially to each of the first touch electrodes 1211, and the touch position can be determined based on the sensing signals received by the multiple second touch electrodes 1231. When a finger touches the touch electrode, part of the touch drive signal on the first touch electrode 1211 is transmitted back to the ground through the finger, while the remaining part is received by the second touch electrode 1231. Therefore, when a finger touches the touch electrode, the amount of the sensing signal received by the second touch electrode 1231 decreases, thereby enabling touch position detection.

[0206] In some embodiments, the first touch electrode 1211 and the second touch electrode 1231 are made of a transparent conductive material; or, the first touch electrode 1211 and the second touch electrode 1231 both include a plurality of metal grids.

[0207] In another implementation, as shown in Figure 12, the first touch electrode layer 121 includes multiple bridging electrodes 1212; the second touch electrode layer 123 includes third and fourth touch electrodes arranged in the same layer. The third touch electrode includes multiple third touch sub-electrodes 1232 spaced apart, with any two third touch sub-electrodes 1232 along the first direction electrically connected via the bridging electrode 1212; and the fourth touch electrode includes multiple directly connected fourth touch sub-electrodes 1233, extending along the second direction.

[0208] The first direction may be the X direction shown in Figure 12, the second direction may be the Y direction shown in Figure 12, and 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.

[0209] In some embodiments, the third touch electrode and the fourth touch electrode are made of a transparent conductive material; or, the third touch electrode and the fourth touch electrode each include a plurality of metal grids.

[0210] 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 .

[0211] Taking the example where the touch layer 120 only includes the first touch electrode layer 121, as shown in Figure 13, 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 capacitor with the ground, and each touch electrode 1213 is used to receive a touch drive signal.

[0212] When a finger touches the touch electrode 1213, 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, thereby detecting the touch position of the finger.

[0213] 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.

[0214] The above description of the touch display module 10 in which the privacy layer 130 is located above the touch layer 120 according to an embodiment of the present application is provided in conjunction with Figures 3 to 13. In some touch display modules 10, the electrodes in the privacy layer 130 can also be reused as touch electrodes, or the privacy layer 130 can also be located below the touch layer 120.

[0215] For example, Figure 14 is a cross-sectional schematic diagram of a first touch display module in which electrodes in the privacy layer are reused as touch electrodes, as provided in an embodiment of the present application. Figure 15 is a top view schematic diagram of the privacy layer in the touch display module shown in Figure 14 . Referring to Figure 14 , the touch display module 10 includes a display panel 110 , a privacy layer 130 , and a cover plate 140 .

[0216] The privacy layer 130 is located on the light-emitting side of the display panel 110. The privacy 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 either side of the dimming film layer 131 in the thickness direction of the display panel 110.

[0217] As shown in FIG15 , the third electrode layer 138 includes a plurality of fifth electrodes 1381 extending along the second direction. Each fifth electrode 1381 is a strip-shaped 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-shaped electrode, and a gap exists between two adjacent first electrodes 1321. The first direction intersects the second direction.

[0218] The dimming film layer 131 includes an electrochromic layer. 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.

[0219] The first direction may be the X direction shown in Figure 15, and the second direction and the third direction may be the Y direction shown in Figure 15. For example, the second direction and the third direction may be perpendicular to the first direction.

[0220] In some embodiments, the dimming film layer 131 is configured to exhibit a light-transmitting state or a light-shielding state under the action of a voltage applied by the fifth electrode 1381 and the first electrode 1321. When the dimming film layer 131 is in the light-transmitting state, the touch display module 10 is in a non-privacy mode; when the dimming film layer 131 is in the light-shielding state, the touch display module 10 is in a privacy mode.

[0221] 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.

[0222] It can be understood that the cross-sectional view obtained along the cross-sectional view CC′ shown in FIG. 15 may be the touch display module 10 shown in FIG. 14 .

[0223] For example, Figure 16 illustrates a cross-sectional view of a second touch display module in which electrodes in the privacy layer are reused as touch electrodes, as provided in an embodiment of the present application. As shown in Figure 16 , the touch display module 10 includes a display panel 110, a third adhesive layer 180, a privacy layer 130, a polarizer 150, a second adhesive layer 170, and a cover plate 140.

[0224] The third adhesive layer 180 is located between the display panel 110 and the privacy protection layer 130 , and is used to adhere the privacy protection layer 130 to the light-emitting side of the display panel 110 .

[0225] As shown in Figure 16, 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.

[0226] 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 configured to exhibit a light-transmitting state or a light-blocking state under the action of voltages applied by the fifth electrodes 1381 and the first electrodes 1321. Furthermore, one of the fifth electrodes 1381 and the first electrodes 1321 functions as a touch drive electrode, while the other functions as a touch sensing electrode.

[0227] As shown in FIG16 , the polarizer 150 is located on the side of the privacy protection 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.

[0228] 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 set 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.

[0229] Since the thickness of the polarizer 150 is less than the thickness of the first substrate 133 and less 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 position of the polarizer 150 and the first substrate 133 in the anti-peeping layer 130 are interchanged. This can reduce the thickness of the touch display module 10.

[0230] It can be understood that the cross-sectional view obtained along the cross-sectional view CC′ shown in FIG. 15 may be the touch display module 10 shown in FIG. 16 .

[0231] For example, Figure 17 illustrates a cross-sectional view of a third touch display module, in which electrodes in the privacy layer are reused as touch electrodes, according to an embodiment of the present application. As shown in Figure 17 , the touch display module 10 includes a display panel 110, a privacy layer 130, a fourth adhesive layer 190, a polarizer 150, a second adhesive layer 170, and a cover plate 140.

[0232] The anti-peep 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 .

[0233] 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 configured to exhibit a light-transmitting state or a light-blocking state under the action of voltages applied by the fifth electrodes 1381 and the first electrodes 1321. Furthermore, one of the fifth electrodes 1381 and the first electrodes 1321 functions as a touch drive electrode, while the other functions as a touch sensing electrode.

[0234] The fourth adhesive layer 190 is located on the side of the privacy protection layer 130 away from the display panel 110. Specifically, the fourth adhesive layer 190 is located on the side of the first electrode layer 132 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.

[0235] It can be understood that the cross-sectional view obtained along the cross-sectional view CC′ shown in FIG. 15 may be the touch display module 10 shown in FIG. 17 .

[0236] For example, Figure 18 is a cross-sectional schematic diagram of a fourth touch display module provided by an embodiment of the present application, in which electrodes in the privacy layer are reused as touch electrodes. Figure 19 is a top-down schematic diagram of the privacy layer in the touch display module shown in Figure 18. Referring to Figure 18 , the touch display module 10 includes: a display panel 110, a third adhesive layer 180, a polarizer 150, a privacy layer 130, a second adhesive layer 170, and a cover plate 140.

[0237] 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 .

[0238] As shown in Figure 18, 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.

[0239] As shown in FIG19 , the third electrode layer 138 is a surface electrode, and the first electrode layer 132 includes a plurality of sixth electrodes 1323 distributed in an array. The sixth electrodes 1323 may be block electrodes. A gap exists between two adjacent sixth electrodes 1323 along a first direction, and a gap also exists between two adjacent sixth electrodes 1323 along a second direction. The first direction intersects the second direction.

[0240] The dimming film layer 131 includes an electrochromic layer. 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.

[0241] The first direction may be the X direction shown in Figure 19, and the second direction and the third direction may be the Y direction shown in Figure 19. For example, the second direction and the third direction may be perpendicular to the first direction.

[0242] In some embodiments, the dimming film layer 131 is configured to exhibit 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. Furthermore, the sixth electrodes 1323 are multiplexed as touch electrodes, which are self-capacitive touch electrodes.

[0243] 18 , the second adhesive layer 170 is located on the side of the privacy 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 .

[0244] It can be understood that the cross-sectional view obtained along the cross-sectional view DD′ shown in FIG. 19 may be the touch display module 10 shown in FIG. 18 .

[0245] In the touch display module 10 shown in Figures 14 to 19 above, 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, when the dimming film layer 131 includes a polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer may not be patterned.

[0246] The following takes the touch display module 10 shown in FIG. 14 to FIG. 17 as an example to illustrate how the touch display module 10 implements the touch function and the anti-peeping function using a time-sharing control method.

[0247] As shown in FIG20 , the touch display module 10 can alternate between a touch phase and a display phase. Within each frame, the touch phase and the display phase are separated in time. For example, each frame can last 16.6 ms. Furthermore, when the touch display module 10 is operating in the display phase, it can be in either a privacy mode or a non-privacy mode.

[0248] 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.

[0249] When the touch display module 10 operates in the touch stage, a touch driving signal can be applied to the fifth electrode 1381, and the touch driving signal can be a square wave signal as shown in Figure 20; an eighth voltage signal can be applied to the first electrode 1321, and the eighth voltage signal is a DC voltage signal.

[0250] 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 eighth 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.

[0251] 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 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 continuously switches between 1.5 V and -1.5 V.

[0252] However, since each frame duration is in the microsecond range, such as 16.6ms, and the touch phase in each frame accounts for a smaller portion of the frame duration than the display phase, the touch phase accounts for a smaller portion of the frame duration. This shortens the time it takes for the dimming film 131 to continuously switch between the light-transmitting and light-blocking states. Furthermore, since the touch drive signal has a relatively high frequency, the dimming film 131 switches between the light-transmitting and light-blocking states at a high frequency. This ultimately makes the jitter caused by the dimming film 131 switching between the light-transmitting and light-blocking states less noticeable to the human eye, thereby improving the anti-peeping or non-anti-peeping display effect during the touch phase.

[0253] Furthermore, taking the example of a dimming film layer 131 including an electrochromic layer, since the electrochromic layer is conductive, the touch drive signal applied to the fifth electrode 1381 is transmitted to the first electrode 1321 through the electrochromic layer. Consequently, during the touch detection phase, the current signal output by the first electrode 1321 includes both 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. However, since the electrochromic layer has a relatively slow response speed while the touch capacitance has a relatively fast response speed, during the touch detection phase, the majority of the early signal in the current signal output by the first electrode 1321 is due to the current signal coupled by the touch capacitance formed between the first electrode 1321 and the fifth electrode 1381. This allows touch detection to be implemented based on the early signal in the current signal output by the first electrode 1321, thereby improving touch detection accuracy.

[0254] When the touch display module 10 is operating in the display stage and 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 be in a light-shielding state.

[0255] 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 a fourth voltage threshold. The fourth voltage threshold can be set according to actual conditions, for example, the fourth voltage threshold can be 0V.

[0256] 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, then the voltage difference between the voltage of the ninth voltage signal and the voltage of the tenth voltage signal may be 1.5V.

[0257] When the touch display module 10 is operating 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.

[0258] The eleventh voltage signal and the twelfth voltage signal are both DC voltage signals, and the voltage difference between the eleventh voltage signal and the twelfth voltage signal is less than a fifth voltage threshold. The fifth voltage threshold can be set according to actual conditions, for example, the fifth voltage threshold can be 0V.

[0259] 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 may be opposite to each other.

[0260] For example, the eleventh voltage signal applied to the first electrode 1321 can be a DC voltage signal of -1.5V, and the twelfth voltage signal applied to the fifth electrode 1381 can 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 can be -1.5V.

[0261] In summary, the specific implementation method of time-sharing 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 operates 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.

[0262] 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.

[0263] When the touch display module 10 is operating in the touch stage and 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 is operating in the touch stage and in the non-anti-peeping mode, the voltage of the eighth voltage signal applied to the first electrode 1321 may be the second voltage.

[0264] Furthermore, the voltage of the touch driving signal applied to the fifth electrode 1381 when it is at a peak can 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 can be equal to the second voltage. The value corresponding to the first voltage and the value corresponding to the second voltage are reciprocal numbers.

[0265] For example, the voltage of the touch drive signal at a peak may be 0.75 V, and the voltage of the touch drive signal at a valley may be -0.75 V. When the touch display module 10 is operating in the touch stage and in the privacy protection 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 is operating in the touch stage and in the non-privacy protection mode, the eighth voltage signal applied to the first electrode 1321 may be a -0.75 V DC voltage signal.

[0266] The above is directed to a time-sharing control method in a mutual-capacity scenario. Of course, for the touch display module 10 shown in FIG. 18 and FIG. 19 , a time-sharing control method can also be used to implement the touch function and the anti-peeping function.

[0267] Specifically, the sixth electrodes 1323 in the touch display module 10 can be time-division multiplexed, and the sixth electrodes 1323 are multiplexed as touch driving electrodes.

[0268] When the touch display module 10 operates in the touch stage, a touch driving signal may be applied to the sixth electrode 1323 , which may be a square wave signal. A thirteenth voltage signal may be applied to the third electrode layer 138 , which may be a DC voltage signal.

[0269] 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.

[0270] 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.

[0271] Alternatively, when the touch display module 10 operates in the touch stage and is in the privacy protection 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 is in the non-privacy protection mode, the voltage of the thirteenth voltage signal applied to the third electrode layer 138 may be the fourth voltage.

[0272] 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 reciprocal numbers of each other.

[0273] For example, the voltage of the touch drive signal at a peak may be 0.75 V, and the voltage of the touch drive signal at a valley may be -0.75 V. When the touch display module 10 is operating in the touch stage and in the privacy protection mode, the thirteenth voltage signal applied to the third electrode layer 138 may be a DC voltage signal of -0.75 V. When the touch display module 10 is operating in the touch stage and in the non-privacy protection mode, the thirteenth voltage signal applied to the third electrode layer 138 may be a DC voltage signal of 0.75 V.

[0274] When the touch display module 10 is operating in the display stage and in the anti-peeping mode, a fourteenth voltage signal can be applied to the sixth electrode 1323 and a fifteenth voltage signal can be applied to the third electrode layer 138 to control the dimming film layer 131 to be in a light-shielding state.

[0275] The fourteenth voltage signal and the fifteenth voltage signal are both DC voltage signals, and the voltage difference between the fourteenth voltage signal and the fifteenth voltage signal is greater than a sixth voltage threshold. The sixth voltage threshold can be set according to actual conditions, for example, the sixth voltage threshold can be 0V.

[0276] For example, the fourteenth voltage signal applied to the sixth electrode 1323 can be a DC voltage signal of 1.5V, and the fifteenth voltage signal applied to the third electrode layer 138 can 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 can be 1.5V.

[0277] When the touch display module 10 is operating in the display stage and is 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.

[0278] 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 a seventh voltage threshold. The seventh voltage threshold can be set according to actual conditions, for example, the seventh voltage threshold can be 0V.

[0279] For example, the sixteenth voltage signal applied to the sixth electrode 1323 can be a DC voltage signal of -1.5V, and the seventeenth voltage signal applied to the third electrode layer 138 can 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 can be -1.5V.

[0280] In addition, for the time-sharing control method in the self-capacitive scenario, the third electrode layer 138 in the touch display module 10 shown in Figures 18 and 19 can also be removed. In this case, when the touch display module 10 is operating 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 is operating 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 sixth electrodes 1323, and a -1.5V DC voltage signal is applied to the other row of sixth electrodes 1323. When the touch display module 10 is operating 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.

[0281] Therefore, in the embodiment of the present application, the electrodes in the privacy layer 130 can be reused as touch electrodes. While achieving touch detection, the electrodes in the privacy layer 130 can drive the dimming film layer 131 to exhibit a light-transmitting state or a light-shielding state. In this way, a signal for driving the dimming film layer 131 can be applied to the electrodes in the privacy layer 130 during the display phase, and a touch drive signal can be applied to the electrodes in the privacy layer 130 during the touch phase. By utilizing the response speed of the dimming film layer 131 to current and the response speed of the touch capacitor, the touch sensing signal can be separated. This allows touch detection to be achieved without affecting the privacy or non-privacy display effects of the touch display module 10.

[0282] The touch display module 10 shown in FIG. 14 to FIG. 17 is taken as an example below to illustrate how the touch display module 10 implements the touch function and the anti-peeping function by adopting the frequency division control method.

[0283] As shown in Figure 21, 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 it is in the anti-peeping mode may include a touch stage and a display stage. Each frame of the touch display module 10 when it is in the non-anti-peeping mode also includes a touch stage and a display stage.

[0284] The fifth electrode 1381 and the first electrode 1321 may be multiplexed as touch electrodes. The following description will take 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.

[0285] During 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 fifth electrode 1381, and the touch drive signal can be a square wave signal as shown in Figure 21, and an eighteenth voltage signal can be applied to the first electrode 1321 to control the dimming film layer 131 to present a light-shielding state.

[0286] 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, which is the average of the voltage at the peak and the voltage at the valley.

[0287] 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 an eighth voltage threshold. The eighth voltage threshold can be set according to actual conditions. For example, the eighth voltage threshold can be 0V.

[0288] For example, the eighteenth voltage signal applied to the first electrode 1321 can be a DC voltage signal of 1.5V, and the average voltage of the touch drive signal applied to the fifth electrode 1381 can be 0V, then the voltage difference between the voltage of the eighteenth voltage signal and the average voltage of the touch drive signal can be 1.5V.

[0289] In the touch stage and display stage of the touch display module 10 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.

[0290] The nineteenth voltage signal is a DC voltage signal. The voltage difference between 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 a ninth voltage threshold. The ninth voltage threshold can be set based on actual conditions. For example, the ninth voltage threshold can be 0V.

[0291] 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.

[0292] Therefore, regardless of whether in the touch mode or the display mode, the touch drive signal is applied to the fifth electrode 1381. For example, if the dimming film layer 131 includes an electrochromic layer, since the electrochromic layer is conductive, the touch drive signal applied to the fifth electrode 1381 is transmitted through the electrochromic layer to the first electrode 1321. Thus, 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 achieved based on the earlier signal in the current signal output by the first electrode 1321.

[0293] The above is directed to the frequency division control method in the mutual capacitance scenario. Of course, for the touch display module 10 shown in Figures 18 and 19, the frequency division control method can also be used to achieve the touch function and the anti-peeping function.

[0294] 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, and the touch drive signal can be a square wave signal. A twentieth voltage signal can be applied to the third electrode layer 138, and the twentieth voltage signal is a DC voltage signal.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] Therefore, in the embodiment of the present application, the electrodes in the privacy layer 130 can be reused as touch electrodes. While realizing touch detection, the electrodes in the privacy layer 130 can drive the dimming film layer 131 to present a light-transmitting state or a light-shielding state.

[0301] For example, Figure 22 is a cross-sectional view of a first touch display module provided by an embodiment of the present application, wherein the privacy layer is located below the touch layer. Referring to Figure 22 , the touch display module 10 includes: a display panel 110 , a privacy layer 130 , a touch layer 120 , and a cover plate 140 .

[0302] The privacy 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 arranged in sequence 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 either side of the dimming film layer 131 in the thickness direction of the display panel 110. The dimming film layer 131 is configured to exhibit a light-transmitting state or a light-blocking state under the action of the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0303] As shown in FIG22 , the touch layer 120 is located on the side of the privacy 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 .

[0304] 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.

[0305] For example, Figure 23 is a cross-sectional schematic diagram of a second touch display module according to an embodiment of the present application, wherein the privacy layer is located below the touch layer. As shown in Figure 23 , the touch display module 10 includes a display panel 110, a third adhesive layer 180, a privacy layer 130, a polarizer 150, a touch layer 120, a second adhesive layer 170, and a cover plate 140.

[0306] The third adhesive layer 180 is located between the display panel 110 and the privacy protection layer 130 , and is used to adhere the privacy protection layer 130 to the light-emitting side of the display panel 110 .

[0307] The privacy 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 configured to present a light-transmitting state or a light-blocking state under the action of the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0308] As shown in Figure 23, the polarizer 150 is located on the side of the privacy protection 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.

[0309] It should be noted that the positions of the polarizer 150 and the first substrate 133 in the privacy layer 130 can be interchanged; alternatively, the polarizer 150 can 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. In addition, the touch display module 10 shown in Figure 23 can also be called an external touch display module.

[0310] For example, Figure 24 is a cross-sectional schematic diagram of a third touch display module according to an embodiment of the present application, wherein the privacy layer is located below the touch layer. As shown in Figure 24 , the touch display module 10 includes a display panel 110, a third adhesive layer 180, a privacy layer 130, a polarizer 150, a second adhesive layer 170, a touch layer 120, and a cover plate 140.

[0311] The third adhesive layer 180 is located between the display panel 110 and the privacy protection layer 130 , and is used to adhere the privacy protection layer 130 to the light-emitting side of the display panel 110 .

[0312] The privacy 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 configured to present a light-transmitting state or a light-blocking state under the action of the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0313] As shown in Figure 24, the polarizer 150 is located on the side of the privacy protection 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.

[0314] It should be noted that the touch display module 10 shown in FIG24 has a touch layer 120 formed on a cover plate 140. The cover plate 140 with the touch layer 120 is then bonded to other film layers via a second adhesive layer 170. Therefore, the touch display module 10 shown in FIG24 can also be referred to as an on glass solution (OGS) touch display module.

[0315] For example, Figure 25 is a cross-sectional schematic diagram of a fourth touch display module according to an embodiment of the present application, in which the privacy layer is located below the touch layer. As shown in Figure 25 , the touch display module 10 includes a display panel 110, a privacy 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.

[0316] The privacy 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 configured to exhibit a light-transmitting state or a light-blocking state under the action of the voltage applied by the first electrode layer 132 and the third electrode layer 138.

[0317] As shown in Figure 25, the fourth insulating layer 191 is located on the side of the privacy protection 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.

[0318] 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, the spacing 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 in the thickness direction of the display panel 110.

[0319] Taking the touch display module 10 shown in FIG25 as an example, the thickness of the fourth insulating layer 191 is actually set to be greater than 8 microns. Taking the touch display module 10 shown in FIG23 as an example, the thickness of the polarizer 150 is actually set to be greater than 8 microns. Taking the touch display module 10 shown in FIG24 as an example, the total thickness of the polarizer 150 and the second adhesive layer 170 is actually set to be greater than 8 microns.

[0320] 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 is reduced.

[0321] For the touch display module 10 shown in Figures 22 to 25 , 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, which includes multiple electrochromic portions 1311 extending along a third direction. Each electrochromic portion 1311 is arranged in a strip shape, and gaps exist between 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.

[0322] 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 can refer to the above-mentioned Figures 15 or 19.

[0323] In addition, for the touch display module 10 shown in Figures 22 to 25, 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 structure of the first touch electrode layer 121 and the second touch electrode layer 123 can refer to the structure shown in Figure 11, Figure 12 or Figure 13 above. To avoid repetition, they will not be repeated here.

[0324] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of this application in detail. It should be understood that the above are only specific implementation methods of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included in the scope of protection of this 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, located on a 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 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 includes a plurality of second electrodes extending along a second direction, each of the second electrodes is a strip electrode, and there is a gap between two adjacent second electrodes; the second direction intersects with 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 both connected to the first An electrode is arranged in the same layer.

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.

Images