Display module and terminal equipment

Abstract

The invention provides a display module and terminal equipment, the display module comprises a display panel, an electrode layer, a friction layer and a signal detection unit, the electrode layer is arranged on the side, away from the display panel, of the touch side of the display panel, the friction layer is arranged on the side, away from the display panel, of the electrode layer, and the signal detection unit is electrically connected with the electrode layer. The electrode layer and the friction layer are arranged on the touch side of the display panel, the friction layer generates friction charges based on external force friction, the electrode layer generates electrical signals based on the friction charges, and the signal detection unit can obtain the electrical signals output by the electrode layer. The pressure applied to the display panel is represented according to the electric signal, namely, the mechanical performance applied to the display panel is converted into the electric signal, the magnitude of the pressure borne by the screen body is determined by analyzing the electric signal, an additional power supply unit is not needed, and self-driven pressure detection is achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic displays, and in particular to a display module and a terminal device. Background Art

[0002] A display panel with a touch function includes a display layer, a touch layer and a protective layer. The touch layer is laminated on the display side of the display layer, and the protective layer is laminated on the side of the touch layer away from the display layer. Since the display layer, the touch layer and the protective layer are made through a lamination process, if any one of the layers is damaged, the entire display panel will not work and the entire screen module needs to be replaced, which will cause certain economic losses. One of the reasons for the damage of the display panel is that the pressure on its surface is too high, so it is necessary to monitor the pressure on its surface. Summary of the invention

[0003] In view of this, the purpose of the present disclosure is to provide a display module and a terminal device, which can not only realize self-driven pressure detection of the display panel, but also provide electrical energy for the display panel.

[0004] A display module, comprising:

[0005] Display panel;

[0006] The electrode layer is arranged on a side of the touch-control side of the display panel away from the display panel;

[0007] A friction layer is arranged on a side of the electrode layer facing away from the display panel;

[0008] and a signal detection unit, which is electrically connected to the electrode layer and is used to obtain the electrical signal output by the electrode layer.

[0009] In one embodiment, both the electrode layer and the friction layer are transparent film layers;

[0010] Preferably, the friction layer comprises at least one of a polydimethylsiloxane layer, a polyethylene terephthalate layer, a polytetrafluoroethylene layer, and a fluorinated ethylene propylene copolymer layer;

[0011] The electrode layer includes an indium tin oxide or an indium zinc oxide layer.

[0012] In one embodiment, the friction layer includes a plurality of friction units, and the plurality of friction units are arranged in an array;

[0013] Preferably, the electrode layer includes a plurality of electrode units, a side of each electrode unit facing away from the display panel corresponds to a friction unit, and each electrode unit is electrically connected to the signal detection unit.

[0014] In one embodiment, the friction layer and the electrode layer are both integral structures;

[0015] The signal detection unit comprises a detection element, a first end of the detection element is connected to the electrode layer, and a second end of the detection element is grounded.

[0016] In one embodiment, the friction layer and the electrode layer are both split structures;

[0017] Preferably, the display panel comprises a first portion, a bending portion and a second portion connected in sequence, and the first portion and the second portion are folded or unfolded through the bending portion;

[0018] The electrode layer includes a first electrode portion and a second electrode portion, the first electrode portion is arranged on the first portion and the partially bent portion, and the second electrode portion is arranged on the second portion and the partially bent portion;

[0019] The friction layer includes a first friction part and a second friction part, the first friction part is arranged on a side of the first electrode part away from the first part, the second friction part is arranged on a side of the second electrode part away from the second part, and the materials of the first friction part and the second friction part have different triboelectric properties;

[0020] The signal detection unit is electrically connected to the first electrode portion and / or the second electrode portion;

[0021] Preferably, a projection area of ​​the first electrode portion on the bent portion is the same as a projection area of ​​the second electrode portion on the bent portion.

[0022] In one embodiment, the signal detection unit includes a detection element and a switch control module;

[0023] The first end of the detection element is connected to the first electrode portion;

[0024] The switch control module is used to control the second end of the detection element to be grounded or connected to the second electrode portion.

[0025] In one embodiment, it further includes a processing unit,

[0026] The processing unit is electrically connected to the signal detection unit and the display panel, and is used to compare the electrical signal acquired by the signal detection unit with a preset threshold signal, and output a corresponding control signal;

[0027] If the electrical signal does not exceed the first threshold signal, the processing unit outputs an insulation signal;

[0028] If the electrical signal exceeds the first threshold signal, the processing unit outputs a touch signal;

[0029] Preferably, if the electrical signal exceeds the second threshold signal, the processing unit outputs a warning signal, and the first threshold signal is smaller than the second threshold signal.

[0030] In one embodiment, the present invention further comprises: a metal wiring layer, the metal wiring layer is electrically connected to the signal detection unit,

[0031] The metal wiring layer is located on the side of the electrode layer away from the display panel and on the side of the friction layer close to the display panel, and the material of the metal wiring layer is at least one of Ti / Al / Ti, Mo or ITO;

[0032] Alternatively, the metal wiring layer and the electrode layer are provided in the same layer, and the material of the metal wiring layer is ITO.

[0033] In one embodiment, the metal wiring layer includes a plurality of metal wirings, the plurality of metal wirings are in a mesh structure and are electrically connected to the signal detection unit;

[0034] Preferably, the metal routing includes a plurality of first sub-metal routings extending along a first direction and arranged along a second direction, and a plurality of second sub-metal routings extending along a second direction and arranged along the first direction. The first sub-metal routings and the second sub-metal routings are arranged in the same layer, and the first direction is arranged to cross the first direction.

[0035] A second aspect of the present application discloses a terminal device, the terminal device comprising the above-mentioned display module;

[0036] The energy storage unit is electrically connected to the electrode layer and stores the electrical signal output by the electrode layer.

[0037] Compared with the prior art, the friction layer in the display module of the present invention generates friction charges based on external force friction, and the electrode layer generates electrical signals based on the friction charges. The signal detection unit can obtain the electrical signal output by the electrode layer, and characterize the pressure applied to the display panel according to the electrical signal, that is, the mechanical properties applied to the display panel are converted into electrical signals. By analyzing the electrical signals, the pressure on the screen can be determined, and no additional power supply unit is required, thereby realizing self-driven pressure detection. At the same time, the terminal device in the present invention provides electrical energy to the display panel by setting an energy storage unit, thereby realizing autonomous power supply to the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the display module structure disclosed in this embodiment;

[0040] Figure 2 This is a schematic diagram of the arrangement of friction units in the friction layer disclosed in this embodiment;

[0041] Figure 3 This is a schematic diagram of a non-foldable display panel disclosed in this embodiment;

[0042] Figure 4 A schematic diagram of the working principle of sensing the pressure applied to the non-foldable display panel disclosed in this embodiment;

[0043] Figure 5 is a schematic diagram of a foldable display panel disclosed in this embodiment;

[0044] Figure 6 A schematic diagram of the working principle of sensing the pressure applied to the foldable display panel disclosed in this embodiment;

[0045] Figure 7 A schematic diagram of a first connection between an electrode layer and an energy storage unit of a non-foldable display panel disclosed in this embodiment;

[0046] Figure 8 A second connection diagram of the electrode layer and the energy storage unit of the non-foldable display panel disclosed in this embodiment;

[0047] Fig. 9 This is a schematic diagram of a first connection between an electrode layer and an energy storage unit of a foldable display panel disclosed in this embodiment;

[0048] Fig.10 This is a second connection diagram of the electrode layer and the energy storage unit of the foldable display panel disclosed in this embodiment. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0050] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] As described in the background technology, in order to effectively detect the pressure applied to the display panel by the outside, a pressure sensor is set on the display panel. However, in the prior art, the pressure sensors set on the display panel are mostly based on resistive, capacitive, or piezoelectric sensors. For example, a resistive pressure sensor is set on the bending portion of the foldable display panel. The pressure sensor is used to detect the deformation state of the surface of the bending portion and generate electrical signals representing different deformation states. The bending angle of the foldable display panel is judged based on the resistance value, and the external pressure applied to the foldable display panel is calculated based on the bending angle of the foldable display panel; for example, a capacitive pressure sensor is set on the foldable display panel, and the external pressure applied to the foldable display panel is sensed based on the change in capacitance. However, the inventors of the present application have found the following problems in the relevant technology during long-term actual work: the above-mentioned pressure sensor is not sensitive to the pressure detection applied to the display panel by the outside, and needs to be powered by a battery, and cannot realize self-driven detection.

[0052] Based on the above reasons, the present application provides a display module and a terminal device, wherein the display module includes a display panel, an electrode layer, a friction layer and a signal detection unit, wherein the electrode layer is arranged on a side of the touch side of the display panel away from the display panel, and the friction layer is arranged on a side of the electrode layer away from the display panel. The signal detection unit is electrically connected to the electrode layer and is used to obtain an electrical signal output by the electrode layer. In the present disclosure, an electrode layer and a friction layer are arranged on the touch side of the display panel, and the friction layer generates friction charges based on external force friction, and the electrode layer generates electrical properties based on the friction charges. The signal detection unit can obtain the electrical signal output by the electrode layer, and characterize the pressure applied to the display panel according to the electrical signal, that is, convert the mechanical properties applied to the display panel into electrical signals. By analyzing the electrical signals, the magnitude of the pressure applied to the screen is determined, and no additional power supply unit is required, thereby realizing self-driven pressure detection. At the same time, the terminal device provides electrical energy to the display panel by setting an energy storage unit, thereby realizing autonomous power supply to the display panel.

[0053] Please refer to Figure 1 In the first aspect of the present application, a display module is disclosed, which includes a display panel 10, an electrode layer 20, a friction layer 30 and a signal detection unit 50. The electrode layer 20 is arranged on the touch side of the display panel 10 away from the display panel; the friction layer 30 is arranged on the side of the electrode layer 20 away from the display panel 10; the signal detection unit is electrically connected to the electrode layer 20, and is used to obtain the electrical signal output by the electrode layer 20.

[0054] In a specific embodiment, the friction layer 30 and the electrode layer 20 are both transparent film layers, which does not affect the display effect of the display panel 10. It should be noted that the friction layer 30 and the electrode layer 20 are both transparent film layers, which means that the friction layer 30 and the electrode layer 20 have high transparency, so as not to affect the display effect of the display panel 10, and it is not narrowly understood that the transparency must be 00%.

[0055] In a specific embodiment, the friction layer 30 can be selected from a material having triboelectric charging, and the conductive layer 20 includes a metal conductive layer or a metal oxide layer. Specifically, the friction layer 30 includes at least one of a polydimethylsiloxane layer (PDMS layer), a polyethylene terephthalate layer (PET layer), a polypropylene (PP), a polytetrafluoroethylene layer (PTFE) and a fluorinated ethylene propylene copolymer layer (FEP layer), and the electrode layer 20 includes an indium tin oxide (ITO layer) or an indium zinc oxide layer (IZO layer).

[0056] In a specific embodiment, the friction layer 30 may include a friction unit, that is, the friction unit is disposed on the display panel. Further, the electrode layer 20 may include an electrode unit, which is connected to the signal detection unit 50. Figure 2 The friction layer 30 may also include a plurality of friction units 33, and the plurality of friction units 33 are arranged in an array. Further, the electrode layer 20 includes a plurality of electrode units (not shown in the drawings), and each electrode unit corresponds to a friction unit 33 on a side facing away from the display panel 10, and each electrode unit is electrically connected to the signal detection unit 50. By setting the friction layer 30 to include a plurality of friction units 33 arranged in an array, and setting the electrode layer 20 to include a plurality of electrode units, the user's touch action can be effectively captured, and the conversion rate of the mechanical energy of the user's touch action can be further improved.

[0057] refer to Figure 3 and Figure 4 In a specific embodiment, the friction layer 30a and the electrode layer 20a are both integrated structures. In this case, the friction layer 30a and the electrode layer 20a of the integrated structure are suitable for sensing the pressure applied to the non-foldable display panel 10a. The electrode layer 20a and the friction layer 30a of the integrated structure are sequentially stacked on the non-foldable display panel 10a, wherein the signal detection unit 50 includes a detection element 51a, the first end of the detection element 51a is connected to the electrode layer 10a, and the second end of the detection element is grounded. In actual applications, users mostly choose to touch and press the display panel with their fingers or a touch pen, and the pressure applied to the display panel 10a is sensed by setting the friction layer 30a, the electrode layer 20a and the signal detection unit on the touch side of the display panel.

[0058] The following takes the finger contacting and pressing the display panel as an example to describe the working principle of the friction layer 30a, the electrode layer 20a and the signal detection unit 50 sensing the pressure applied to the display panel in this embodiment (eg, Figure 4 As shown); before the finger 70 contacts and presses the friction layer 30a, the finger 70 and the friction layer 30a are not in contact, and no charge is generated on the surfaces of both. When the finger 70 contacts and presses the friction layer 30a, due to the different frictional electrical properties between the finger 70 and the friction layer 30a, taking the finger 70 having a stronger electron loss ability as an example, the surface of the friction layer 30a has a negative charge, and the surface of the finger 70 has a positive charge. Electrons will flow from the electrode layer 20a to the detection element 51a, and the detection element 51a can detect the corresponding electrical signal output. When the finger 70 and the friction layer 30a are completely separated, the charges reach a balance and no electrons flow. When the finger 70 contacts the friction layer 30a again, in order to maintain the charge balance, electrons will flow from the earth to the electrode layer 20a, and the detection element 51a detects an electrical signal in the opposite direction. At the same time, the electrical signal detected by the detection element 51a can represent the degree of pressure of the finger 70.

[0059] In this embodiment, since the fingers 70 in contact with the friction layer 30a are mostly uncharged, the friction layer 30a in this embodiment can be selected from materials that have a strong ability to absorb negative electrons when friction occurs, such as the friction layer 30a includes a polydimethylsiloxane layer (PDMS layer), and the electrode layer 20a includes an indium tin oxide layer (ITO layer). It can be understood that the polydimethylsiloxane layer (PDMS layer) has high transparency and good chemical stability, can improve the wear resistance of the friction layer, and has a strong ability to absorb negative charges. Similarly, the indium tin oxide layer (ITO layer) has better transparency, can further improve the display effect of the display panel 10, and the indium tin oxide layer (ITO layer) has better conductivity, which can ensure the power generation capacity of the power generation layer group 20.

[0060] refer to Figure 5 and Figure 6In a specific embodiment, the friction layer and the electrode layer are both split structures. In this case, the friction layer and the electrode layer of the split structure are suitable for sensing the pressure applied to the foldable display panel 10b. The foldable display panel 10b includes a first portion 11b, a bending portion 13b, and a second portion 2b connected in sequence. The first portion 11b and the second portion 12b are folded or unfolded through the bending portion; the electrode layer includes a first electrode portion 21b and a second electrode portion 22b, wherein the first electrode portion 21b is arranged on the first portion 11b and a portion of the bending portion 13b of the foldable display panel, and the second electrode portion 22b is arranged on the second portion 12b and a portion of the bending portion 13b of the display surface. Optionally, the projection area of ​​the first electrode portion 21b on the bending portion 13b is the same as the projection area of ​​the second electrode portion 22b on the bending portion 13b, that is, the first electrode portion 21b and the second electrode portion 22b respectively cover half of the bending portion 13b, the friction layer includes a first friction portion 31b and a second friction portion 32b, the first friction portion 31b is arranged on the side of the first electrode portion 21b away from the first portion 11b, and the second friction portion 32b is arranged on the side of the second electrode portion 22b away from the second portion 12b, and the material frictional electrical properties of the first friction portion 31b and the second friction portion 32b are different; the signal detection unit 50 is electrically connected to the first electrode portion 21b and / or the second electrode portion 22b.

[0061] Continue to refer Figure 5 and Figure 6 In a specific embodiment, the signal detection unit 50 includes a detection element 51b and a detection switch control module 52b; the first end of the detection element 51 is connected to the first electrode portion 21b, and the detection switch control module 52b is used to control the second end of the detection element 51b to be grounded or connected to the second electrode portion 22b. Specifically, the detection switch control module 53 includes a first switch element (TFT1) and a second switch element (TFT2), the gate of the first switch element (TFT1) and the gate of the second switch element (TFT2) are arranged in parallel at the second end of the detection element 51b, the source of the first switch element (TFT1) is grounded, and the source of the second switch element (TFT1) is connected to the second electrode portion 22b. When the foldable display panel is in the unfolded state, the first switch element (TFT1) is turned on, and the second end of the detection element 51b is grounded. When the foldable display panel 10b is in the folded state, the second switch element (TFT1) is turned on, and the second end of the detection element 51b is connected to the second electrode portion 22b.

[0062] Since the foldable display panel 10b has two states, folded and unfolded, when the foldable display panel 10b is in the unfolded state, the working principle of the friction layer, the electrode layer and the signal detection unit sensing the pressure applied to the foldable display panel 10 is the same as the working principle of the non-foldable display panel 10a described above, and no further explanation is given here; when the foldable display panel 10b is in the folded state, the working principle of the first friction portion 31b, the second friction portion 32b, the first electrode portion 21b, the second electrode portion 22b and the signal detection unit 50 sensing the pressure applied to the foldable display panel in this embodiment is as follows Figure 6 As shown, when the first friction part 31b and the second friction part 32b are close to each other under the action of external force, due to the different frictional electric properties between the first friction part 31b and the second friction part 32b, the surfaces of the first friction part 31b and the second friction part 32b generate positive or negative charges respectively, and the frictional charges generated increase with the increase of the degree of folding and pressing. In the process of opening the folding screen, the balance of the charges on the surfaces of the first friction part 31b and the second friction part 32b is destroyed, and electrons flow from the second electrode part to the first electrode through the detection element 51b, and the detection element 51b can detect the corresponding electrical signal output. After the first friction part 31b and the second friction part 32b are completely separated, the charges reach a balance and no electrons flow. In the process of folding the first friction part 31b and the second friction part 32b again, in order to maintain the overall potential balance, electrons flow from the first electrode part 21b to the second electrode part 22b through the detection element 51b, and the detection element 51b detects the electrical signal in the opposite direction. At the same time, the electrical signal detected by the detection element 52b can characterize the folding degree of the foldable display panel 10b.

[0063] In this embodiment, the first friction portion 31b and the second friction portion 32b together constitute a friction layer, and the materials of the first friction portion 31b and the second friction portion 32b have different frictional properties. The first friction portion 31b includes a polyethylene terephthalate layer (PET layer), and the second friction portion 32b includes a polydimethylsiloxane layer (PDMS layer). When the first friction portion 31b and the second friction portion 32b are in contact, since the polyethylene terephthalate layer (PET) has a stronger electron-accepting ability than the polydimethylsiloxane layer (PDMS), the polyethylene terephthalate (PET) is positively charged and the polydimethylsiloxane (PDMS) is negatively charged. The first electrode portion 21b and the second electrode portion 22b may both include an indium tin oxide layer (ITO layer).

[0064] It should be noted that the triboelectric properties of the materials involved in the present disclosure refer to the ability of a material to gain or lose electrons when it rubs or contacts with other materials. That is, when two materials with different triboelectric properties come into contact, one is positively charged and the other is negatively charged, indicating that the two materials have different abilities to gain electrons, that is, their triboelectric properties are different.

[0065] refer to Figure 4 and Figure 6 In a specific embodiment, the display module further includes a processing unit (not shown in the drawings), which is electrically connected to the signal detection unit and the display panel, and is used to compare the electrical signal obtained by the signal detection unit with a preset threshold signal, and output a corresponding control signal. If the electrical signal does not exceed the first threshold signal, the processing unit outputs an insulation signal; if the electrical signal exceeds the first threshold signal, the processing unit outputs a touch signal. Specifically, if the value of the electrical signal output by the electrode layer does not exceed the first threshold signal, it is defined that the external force applied to the touch display panel is an invalid touch; if the electrical signal output by the electrode layer exceeds the first threshold signal, it is defined that the external force applied to the touch display panel is a valid touch. This design avoids accidental touch by the user during practical use; further, when the external pressure applied to the display panel is close to the limit of the external force that the display panel can withstand, the electrical signal sensed by the signal detection unit is defined as a second threshold signal (such as Figure 4 Point A or Figure 6 If the electrical signal exceeds the second threshold signal, the processing unit outputs a warning signal to remind the user that the screen is about to be broken.

[0066] refer to Figure 3 or Figure 5In a specific embodiment, it also includes a metal routing layer, the metal routing layer is electrically connected to the signal detection unit, the metal routing layer includes a plurality of metal routings 40, the plurality of metal routings 40 are in a mesh structure and are electrically connected to the signal detection unit; specifically, the plurality of metal routings 40 include a plurality of first sub-metal routings 41 extending along a first direction (X direction) and arranged along a second direction (Y direction), and a plurality of second sub-metal routings 41 extending along the second direction (Y direction) and arranged along the first direction (X direction), the first sub-metal routings 41 and the second sub-metal routings 42 are arranged in the same layer, the first direction (X direction) and the first direction (Y direction) are arranged crosswise, further, the first direction (X direction) and the second direction (Y direction) are perpendicular to each other, and with respect to the position of the metal routing layer, on the one hand, the metal routing layer is located on the side of the electrode layer away from the display panel. side, and is located on the side of the friction layer close to the display panel, the material of the metal routing layer is at least one of Ti / Al / Ti, Mo or ITO, that is, the material of the multiple metal routings is at least one of Ti / Al / Ti, Mo or ITO, wherein Ti / Al / Ti or Mo are all opaque materials, so in order not to affect the display effect of the display panel, Ti / Al / Ti or Mo needs to avoid the display luminous area, and Ti / Al / Ti or Mo needs to be in the form of thin wires, such a design can effectively prevent the multiple metal routings 40 from affecting the display effect of the display panel, wherein the metal routings made of Ti / Al / Ti material have a small resistivity and are more corrosion-resistant, which is conducive to improving the detection accuracy, on the other hand, and also as a preferred embodiment, the metal routing layer is arranged in the same layer as the electrode layer, and the material of the metal routing layer is ITO. The material of the metal routing layer is the same as that of the electrode layer, that is, the material of the multiple metal routings 40 is ITO, and in this embodiment, by setting multiple metal routings 40, the position pressed by the finger can be accurately located.

[0067] refer to Figure 7-10 In the second aspect of the present application, a terminal device is provided, which includes the above-mentioned display module and an energy storage unit. The energy storage unit is electrically connected to the electrode layer and is used to store the electrical signal generated by the electrode layer. Furthermore, the energy storage unit includes a battery or a capacitor. The electrical signal generated by the electrode layer is finally stored in the battery or the capacitor, so that the external mechanical energy can be converted into electrical energy for storage and standby. When the display screen is low on power, this reserve electrical energy can be used. Furthermore, the energy storage unit also includes a rectifier for rectifying the electrical signal generated by the electrode layer, and then transmitting the rectified electrical signal to the battery or the capacitor. On the other hand, the energy storage unit includes a rectifier, and the two ends of the rectifier are respectively connected to the battery of the electrode layer and the display panel. Such a design can self-charge the display panel through folding & opening operation / touch pressing operation, thereby realizing the power supply function.

[0068] refer to Figure 7-Figure 8When the display panel is a non-foldable display panel, the energy storage unit 70a of the terminal device includes a rectifier 71a and a battery 72a or a capacitor Ca, the first end of the rectifier 71a is connected to the electrode layer 20a, the second end of the rectifier 71a is connected to the first end of the battery 72a, or the second end of the rectifier 71a is connected to the first end of the capacitor Ca, and the second end of the capacitor Ca or the battery 72a is grounded.

[0069] refer to Figure 7-Figure 8 When the display panel is a foldable display panel, the energy storage unit 70b of the terminal device includes a rectifier 71b, a battery 72b or a capacitor Cb, and an energy storage switch control module 73b connected in sequence. The energy storage switch control module 73b is used to control the battery 72b or the capacitor Cb to be grounded or connected to the second electrode portion 22b. Specifically, the energy storage switch control module 73b includes a third switch element (TFT3) and a fourth switch element (TFT4). The gate of the third switch element (TFT3) and the gate of the fourth switch element (TFT4) are arranged in parallel at the second end of the battery 72b or the capacitor Cb, the source of the third switch element (TFT3) is grounded, and the source of the fourth switch element (TFT4) is connected to the second electrode portion 22b. When the foldable display panel is in an unfolded state, the third switch element (TFT3) is turned on, and the second end of the battery 72b or the capacitor Cb is grounded. When the foldable display panel 10b is in a folded state, the fourth switch element (TFT4) is turned on, and the second end of the detection element 51b is connected to the second electrode portion 22b.

[0070] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0071] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display module, characterized in that: include: Display panel; An electrode layer, arranged on a side of the touch-control side of the display panel away from the display panel; A friction layer, disposed on a side of the electrode layer away from the display panel; and a signal detection unit, which is electrically connected to the electrode layer and is used to obtain the electrical signal output by the electrode layer.

2. The display module according to claim 1, characterized in that: The electrode layer and the friction layer are both transparent film layers; Preferably, the friction layer comprises at least one of a polydimethylsiloxane layer, a polyethylene terephthalate layer, a polytetrafluoroethylene layer and a fluorinated ethylene propylene copolymer layer; The electrode layer includes an indium tin oxide layer or an indium zinc oxide layer.

3. The display module according to claim 1, characterized in that: The friction layer comprises a plurality of friction units, and the plurality of friction units are arranged in an array; Preferably, the electrode layer includes a plurality of electrode units, a side of each electrode unit facing away from the display panel corresponds to a friction unit, and each electrode unit is electrically connected to the signal detection unit.

4. The display module according to claim 1, characterized in that: The friction layer and the electrode layer are both integrated structures; The signal detection unit comprises a detection element, a first end of the detection element is connected to the electrode layer, and a second end of the detection element is grounded.

5. The display module according to claim 1, characterized in that: The friction layer and the electrode layer are both split structures; Preferably, the display panel comprises a first portion, a bending portion and a second portion connected in sequence, and the first portion and the second portion are folded or unfolded through the bending portion; The electrode layer includes a first electrode portion and a second electrode portion, the first electrode portion is arranged on the first portion and a part of the bent portion, and the second electrode portion is arranged on the second portion and a part of the bent portion; The friction layer comprises a first friction part and a second friction part, the first friction part is arranged on a side of the first electrode part away from the first part, the second friction part is arranged on a side of the second electrode part away from the second part, and the materials of the first friction part and the second friction part have different triboelectric properties; The signal detection unit is electrically connected to the first electrode portion and / or the second electrode portion; Preferably, a projection area of ​​the first electrode portion on the bending portion is the same as a projection area of ​​the second electrode portion on the bending portion.

6. The display module according to claim 5, characterized in that: The signal detection unit includes a detection element and a switch control module; The first end of the detection element is connected to the first electrode portion; The switch control module is used to control the second end of the detection element to be grounded or connected to the second electrode portion.

7. The display module according to claim 1, characterized in that: Also includes a processing unit, The processing unit is electrically connected to the signal detection unit and the display panel, and is used to compare the electrical signal acquired by the signal detection unit with a preset threshold signal, and output a corresponding control signal; If the electrical signal does not exceed the first threshold signal, the processing unit outputs an insulation signal; If the electrical signal exceeds the first threshold signal, the processing unit outputs a touch signal; Preferably, if the electrical signal exceeds a second threshold signal, the processing unit outputs a warning signal, and the first threshold signal is smaller than the second threshold signal.

8. The display module according to claim 1, characterized in that: Also includes: a metal wiring layer, the metal wiring layer being electrically connected to the signal detection unit, The metal wiring layer is located on a side of the electrode layer away from the display panel, and is located on a side of the friction layer close to the display panel, and the material of the metal wiring layer is at least one of Ti / Al / Ti, Mo or ITO; Alternatively, the metal wiring layer and the electrode layer are arranged in the same layer, and the material of the metal wiring layer is ITO.

9. The display module according to claim 8, characterized in that: The metal wiring layer includes a plurality of metal wirings, and the plurality of metal wirings are in a mesh structure and are electrically connected to the signal detection unit; Preferably, the multiple metal routings include a plurality of first sub-metal routings extending along a first direction and arranged along a second direction, and a plurality of second sub-metal routings extending along the second direction and arranged along the first direction. The first sub-metal routings and the second sub-metal routings are arranged in the same layer, and the first direction is arranged crosswise with the first direction.

10. A terminal device, characterized in that: in, A display module comprising any one of claims 1 to 9; An energy storage unit is electrically connected to the electrode layer, and the energy storage unit stores the electrical signal output by the electrode layer.

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