Display module and display device

Abstract

Embodiments of the present application disclose a display module and a display device. The display module comprises a driving substrate, a cathode and a touch structure layer. The cathode is arranged on the driving substrate. The touch structure layer is arranged on a side of the cathode layer away from the substrate. The touch structure layer is provided with a first touch electrode and a second touch electrode arranged perpendicularly to each other. When the touch structure layer is subjected to an external pressing force, at least one of the first touch electrode and the second touch electrode is multiplexed as a first pressure sensing electrode, and the cathode is multiplexed as a second pressure sensing electrode. The present application aims to provide a functional layer capable of realizing touch and pressure sensing at the same time, so as to improve the integration of the display module.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and a display device. Background Technology

[0002] As the demands for human-computer interaction experience become increasingly sophisticated, especially for real-time interaction, ordinary planar touchscreens can no longer meet people's daily needs, leading to the emergence of pressure-sensitive touch technology. Existing pressure-sensitive touchscreen displays typically consist of a pressure-sensitive touch layer and a touch sensing layer. Because these two layers are independently configured, they require their own corresponding integrated circuits (ICs), making integration into a single IC significantly increases the production cost and overall thickness of the pressure-sensitive touchscreen display. Therefore, there is an urgent need to find a display module that addresses the technical problem of low integration in existing pressure-sensitive touchscreen displays. Summary of the Invention

[0003] This application provides a display module and a display device, which aims to provide a functional layer that can simultaneously realize touch and pressure sensitivity, so as to improve the integration of the display module.

[0004] This application embodiment provides a display module, the display module comprising:

[0005] Drive substrate;

[0006] Cathode, the cathode being disposed on the driving substrate; and

[0007] A touch structure layer is disposed on the side of the cathode layer opposite to the substrate, and a first touch electrode and a second touch electrode are disposed therein, which are perpendicular to each other.

[0008] When the touch structure layer is subjected to a pressing force, at least one of the first touch electrode and the second touch electrode is reused as the first pressure-sensitive electrode, and the cathode is reused as the second pressure-sensitive electrode.

[0009] Optionally, in some embodiments of this application, the display module further includes a deformation film layer disposed between the cathode and the touch structure layer, and the deformation film layer is a flexible layer.

[0010] Optionally, in some embodiments of this application, the deformable film layer has a plurality of spaced openings.

[0011] Optionally, in some embodiments of this application, the deformation film layer includes a first deformation strip and a second deformation strip, wherein the first deformation strip extends along a first direction and the second deformation strip extends along a second direction intersecting the first direction;

[0012] Multiple first deformation strips and multiple second deformation strips are cross-connected to form multiple openings.

[0013] Optionally, in some embodiments of this application, the deformable film layer is an optical adhesive layer, and the optical adhesive layer is disposed on the side of the touch structure layer near the cathode.

[0014] Optionally, in some embodiments of this application, when the touch structure layer is subjected to a pressing force, both the first touch electrode and the second touch electrode are reused as the first pressure-sensitive electrode.

[0015] Optionally, in some embodiments of this application, the display module includes an encapsulation structure layer, which includes a first inorganic layer, an organic layer, and a second inorganic layer; the deformable film layer is the organic layer.

[0016] The first inorganic layer is disposed on the cathode, the organic layer is disposed on the first inorganic layer, and the second inorganic layer is disposed on the organic layer.

[0017] Optionally, in some embodiments of this application, the touch structure layer further includes an insulating layer disposed between the first touch electrode and the second touch electrode.

[0018] Optionally, in some embodiments of this application, the touch structure layer further includes an insulating layer and a bridge, the first touch electrode and the second touch electrode are disposed in the same layer, the insulating layer is disposed on the first touch electrode and the second touch electrode, the bridge is disposed on the insulating layer, and the bridge connects two adjacent second touch electrodes.

[0019] Accordingly, this application also provides a display device, including a display module and a backlight module, wherein the display module is disposed on the backlight module, and the display module is the display module described above.

[0020] The display module provided in this application includes a driving substrate, a cathode, and a touch structure layer. The cathode is disposed on the driving substrate, and the touch structure layer is disposed on the side of the cathode layer facing away from the substrate. The touch structure layer contains a first touch electrode and a second touch electrode arranged perpendicularly to each other. When the touch structure layer is subjected to a pressing force, at least one of the first and second touch electrodes is reused as a first pressure-sensitive electrode, and the cathode is reused as a second pressure-sensitive electrode. Thus, the display module of this application, while simultaneously supporting touch and pressure sensitivity, allows the first and second touch electrodes to be reused according to touch and pressure sensitivity, thereby integrating touch and pressure sensitivity into the touch structure layer. This eliminates the need for separate electrodes for pressure sensitivity control, resulting in higher integration of the display module, a thinner and lighter overall size, and lower product cost. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the display module provided in this application;

[0023] Figure 2 This is a schematic diagram of the structure of the second embodiment of the display module provided in this application;

[0024] Figure 3 This is a schematic diagram of the structure of the first and second deformation bars of the second embodiment of the display module provided in this application;

[0025] Figure 4 This is another structural schematic diagram of the first and second deformation bars of the second embodiment of the display module provided in this application;

[0026] Figure 5 This is a schematic diagram of the structure of the third embodiment of the display module provided in this application;

[0027] Figure 6 This is a schematic diagram of the structure of the fourth embodiment of the display module provided in this application;

[0028] Figure 7 This is a schematic diagram of the touch structure layer of the fourth embodiment of the display module provided in this application.

[0029] Explanation of reference numerals in the attached figures:

[0030]

[0031] Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0033] This application provides a display module 100. Detailed descriptions follow. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0034] Reference Figure 1 The first embodiment of this application provides a display module 100. The display module 100 includes a driving substrate 10, a cathode 20, and a touch structure layer 30. The cathode 20 is disposed on the driving substrate 10, and the touch structure layer 30 is disposed on the side of the cathode 20 facing away from the substrate. The touch structure layer 30 contains a first touch electrode 31 and a second touch electrode 32 arranged perpendicularly to each other. When the touch structure layer 30 is subjected to a pressing force, at least one of the first touch electrode 31 and the second touch electrode 32 is reused as a first pressure-sensitive electrode, and the cathode 20 is reused as a second pressure-sensitive electrode.

[0035] The first touch electrode 31 and the second touch electrode 32 can be made of metal mesh, transparent electrode material such as indium tin oxide (ITO), or...

[0036] Materials such as indium zinc oxide (IZO), silver nanowires, and graphene are used. In this embodiment, the cathode 20 provides a reference potential. It should be noted that the touch structure layer 30 can be either a self-capacitance touch setting or a mutual capacitance touch setting. When it is a mutual capacitance touch setting, the first touch electrode 31 and the second touch electrode 32 are in different film layers and projected along the driving substrate 10 toward the touch structure layer 30, with the projections of the first touch electrode 31 and the second touch electrode 32 being perpendicular to each other. When it is a self-capacitance touch setting, the first touch electrode 31 and the second touch electrode 32 are in the same film layer and are arranged perpendicular to each other; see the embodiments below for details. It is understood that the display module 100 of this application has an algorithm for recognizing touch position detection and an algorithm for recognizing pressing graded force detection. When the display module 100 is touched, one of the first touch electrode 31 and the second touch electrode 32 of the touch structure layer 30 acts as a driving electrode, and the other acts as a sensing electrode. The touch function is realized by detecting the change in capacitance between the two electrodes. When the display module 100 is pressed, the distance between at least one of the first touch electrode 31 and the second touch electrode 32 of the touch structure layer 30 and the cathode 20 changes, thereby causing a change in the capacitance value and electric field lines between them. The pressure-sensitive touch integrated circuit's recognition and pressure-sensing force detection algorithm can realize the pressure-sensitive touch function through calculation.

[0037] The display module 100 provided in this application includes a driving substrate 10, a cathode 20, and a touch structure layer 30. The cathode 20 is disposed on the driving substrate 10, and the touch structure layer 30 is disposed on the side of the cathode 20 facing away from the substrate. The touch structure layer 30 has a first touch electrode 31 and a second touch electrode 32 arranged perpendicularly to each other. When the touch structure layer 30 is subjected to a pressing force, at least one of the first touch electrode 31 and the second touch electrode 32 is reused as a first pressure-sensitive electrode, and the cathode 20 is reused as a second pressure-sensitive electrode.

[0038] Thus, the display module 100 of this application, while achieving simultaneous compatibility with touch and pressure sensitivity, allows the first touch electrode 31 and the second touch electrode 32 to be reused according to touch and pressure sensitivity, thereby integrating touch and pressure sensitivity into the touch structure layer 30. This eliminates the need to set up separate electrodes for pressure sensitivity control, resulting in higher integration of the display module 100, a thinner and lighter overall size, and lower product cost.

[0039] In one embodiment, to improve the accuracy of pressure control, when the touch structure layer 30 is subjected to external pressure, both the first touch electrode 31 and the second touch electrode 32 are reused as the first pressure-sensitive electrode. This allows both electrodes to simultaneously determine their distance from the cathode 20. When the distance between both electrodes and the cathode 20 changes, resulting in changes in their capacitance and electric field lines, the pressure-sensitive touch integrated circuit's pressure-grading force detection algorithm can calculate and realize the pressure-sensitive touch function.

[0040] In one embodiment of this application, the display module 100 further includes a deformation film layer disposed between the cathode 20 and the touch structure layer 30, and the deformation film layer is a flexible layer.

[0041] To enhance the pressure sensitivity of the display module 100, a deformation film layer is provided between the cathode 20 and the touch structure layer 30. This deformation film layer is a flexible layer with high flexibility and extensibility, such as foam or colloid. This increases the change in distance between the touch structure layer 30 and the cathode 20 when pressed, thereby making the pressure sensitivity more sensitive and improving the accuracy of pressure sensing.

[0042] It is understood that the elastic modulus of this deformation film layer is less than 3 gigapascals. That is, by setting a deformation film layer with a low elastic modulus, the distance change between the touch structure layer 30 and the cathode 20 under pressure-sensitive conditions can be further improved. The elastic modulus of this deformation film layer can be selected by those skilled in the art according to specific circumstances, and will not be elaborated here.

[0043] Optionally, the touch structure layer 30 further includes an insulating layer 33, which is disposed between the first touch electrode 31 and the second touch electrode 32. In the case of a mutual capacitance touch configuration, the first touch electrode 31 and the second touch electrode 32 can be stacked in the touch structure layer 30, with the insulating layer 33 disposed between them. Furthermore, to enhance the protection of the second touch electrode 32, an insulating layer can also be disposed circumferentially around the second touch electrode 32.

[0044] In the first embodiment of this application, reference is made to Figure 1 The deformable film layer is an optical adhesive layer 40, which is disposed on the side of the touch structure layer 30 near the cathode 20. To ensure the display effect of the display module 100, this deformable film layer is an optical adhesive layer 40. The optical adhesive layer 40 can reduce glare, reduce light loss, increase brightness and provide high transmittance, reduce energy consumption, and increase contrast, especially under strong light. Furthermore, due to its flexibility, the optical adhesive layer 40 can also effectively transmit pressure-sensitive touch signals.

[0045] Furthermore, the display module 100 also includes a cover plate 50, an encapsulation structure layer 60, and a polarizing layer 70. The cover plate 50 is disposed on the side of the touch structure layer 30 away from the optical adhesive layer 40, the encapsulation structure layer 60 is disposed on the side of the cathode 20 close to the optical adhesive layer 40, and the polarizing layer 70 is disposed between the encapsulation structure layer 60 and the optical adhesive layer 40. The encapsulation structure layer 60 encapsulates the cathode 20 and the driving substrate 10 to protect the driving substrate 10. The encapsulation structure layer 60 includes a first inorganic layer, an organic layer, and a second inorganic layer stacked sequentially to improve the water resistance of the driving substrate 10, and the adhesive properties of the adhesive itself ensure the stability of the polarizing layer 70 after its placement. By setting this polarizing layer 70 to reduce the panel reflectivity, the visibility of the display module 100 is improved.

[0046] It should be noted that the polarizing layer 70 can be fixed to the encapsulation structure layer 60 by its own pressure-sensitive adhesive layer. Since the pressure-sensitive adhesive itself has a certain degree of elasticity, this further increases the change in distance between the touch structure layer 30 and the cathode 20 when pressed. Furthermore, openings can be made in the pressure-sensitive adhesive layer to facilitate deformation under pressure, thereby better transmitting pressure control and improving the pressure sensitivity accuracy of the display module 100. The polarizing layer 70 and the touch structure layer 30 are then bonded and fixed by the optical adhesive layer 40. Because the adhesive layer itself has a certain degree of elasticity, it can deform when pressed, ensuring the stability of the connection between the polarizing layer 70 and the touch structure layer 30, while also ensuring the display of the display module 100.

[0047] In some embodiments, the polarizing layer 70 may also be attached externally to the encapsulation structure layer 60 via an adhesive bond.

[0048] The cover plate 50 is disposed above the touch structure layer 30 to protect the touch structure layer. The cover plate 50 is made of fully transparent glass or other transparent material to ensure the display effect of the display module 100.

[0049] Reference Figure 2 The display module 100 of the second embodiment of this application differs from the display module 100 of the first embodiment in that a plurality of spaced openings 41 may be formed on the deformable film layer. It is understood that by forming a plurality of openings 41 on the deformable film layer, the deformable film layer can more easily deform under pressure-sensitive conditions through changes in the openings 41, thereby better transmitting pressure-sensitive control and improving the pressure-sensitive state sensing accuracy of the display module 100. It should be noted that, in order to further increase the deformation of the deformable film layer and facilitate processing, the openings 41 can be through holes; of course, to ensure the supporting strength of the deformable film layer for the touch structure layer 30, they can also be blind holes.

[0050] Reference Figure 3 andFigure 4 The deformation film layer includes a first deformation strip 42 and a second deformation strip 43. The first deformation strip 42 extends along a first direction, and the second deformation strip 43 extends along a second direction intersecting the first direction. Multiple first deformation strips 42 and multiple second deformation strips 43 are cross-connected to form multiple openings 41. Adjacent first deformation strips 42 are located on the same horizontal plane and are spaced apart, and adjacent second deformation strips 43 are located on the same horizontal plane and are spaced apart. The first and second directions can intersect perpendicularly, so that the first deformation strips 42 and the second deformation strips 43 also intersect perpendicularly. This allows the multiple openings 41 formed by the cross-layering of multiple first deformation strips 42 and multiple second deformation strips 43 to form a regular array arrangement, while ensuring that the opening size of the multiple openings 41 is the same. This allows for more accurate sensing of pressure from any position when subjected to external pressure, improving the pressure sensitivity accuracy of the display module 100. Furthermore, since the first deformation strip 42 and the second deformation strip 43 are arranged differently, the opening of the hole 41 can be square or rhomboid, which can be selected by those skilled in the art according to the specific circumstances.

[0051] Reference Figure 5 The display module 100 of the third embodiment of this application differs from the display module 100 of the first or second embodiment in that: the encapsulation structure layer 60 includes a first inorganic layer 61, an organic layer 62, and a second inorganic layer 63 stacked sequentially. The deformable film layer is the organic layer 62, the first inorganic layer 61 is disposed on the cathode 20, the organic layer 62 is disposed on the first inorganic layer 61, and the second inorganic layer 63 is disposed on the organic layer 62.

[0052] The first inorganic layer 61 and the second inorganic layer 63 can be made of one or more of silicon nitride, silicon oxynitride, silicon oxide, or aluminum oxide. The organic layer 62 can be made of one or more of acrylic, epoxy resin, or organosilicon.

[0053] The deformable film layer is an organic layer 62. The deformation of the organic layer 62 increases the distance between the touch structure layer 30 and the cathode 20 when pressed. Forming the deformable film layer directly within the encapsulation structure layer 60 effectively ensures pressure sensitivity accuracy while further reducing the size of the display module 100. Furthermore, multiple spaced openings 621 can be formed on the organic layer 62. Under pressure sensitivity, the organic layer 62 deforms more easily due to changes in the openings 621, thus better transmitting pressure control and improving the pressure sensitivity accuracy of the display module 100.

[0054] Furthermore, the display module 100 also includes a cover plate 50, and a touch structure layer 30 is formed on the second inorganic layer 63, with the cover plate 50 disposed on the touch structure layer 30. The touch structure layer 30 can be deposited on the second inorganic layer 63 by chemical vapor deposition (CVD) or physical vapor deposition (PVD) to make the structure of the display module 100 more stable, save on additional optical adhesive layers, and thin the display module 100. The cover plate 50 is also provided to protect the touch structure layer 30, thereby improving its lifespan.

[0055] Reference Figure 6 and Figure 7 The fourth embodiment of this application differs from the embodiments described above in that: the touch structure layer 30 further includes an insulating layer 33 and a bridge 34. The first touch electrode 31 and the second touch electrode 32 are disposed on the same layer, the insulating layer 33 is disposed on the first touch electrode 31 and the second touch electrode 32, and the bridge is disposed on the insulating layer 33, connecting adjacent second touch electrodes 32. This makes the touch state of the touch structure layer 30 a self-capacitance touch, that is, the display module 100 is a self-capacitance screen. A self-capacitance screen requires a conductor to contact the screen to respond, so it does not require much force; a light touch of the finger is sufficient for recognition, making the display module 100 highly sensitive, supporting multi-touch, and improving user convenience.

[0056] This application provides a display device, which includes a display module 100 and a backlight module, wherein the display module 100 is disposed on the backlight module. The display module 100 is the display module 100 described in any of the above embodiments. Since the display module 100 in this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] The above provides a detailed description of a display module and its display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display module, characterized in that, The display module includes: Drive substrate; Cathode, wherein the cathode is disposed on the driving substrate; A touch structure layer is disposed on the side of the cathode away from the substrate, and a first touch electrode and a second touch electrode are disposed therein, which are perpendicular to each other. An encapsulation structure layer, comprising a first inorganic layer, an organic layer, and a second inorganic layer, wherein the first inorganic layer is disposed on the cathode, the organic layer is disposed on the first inorganic layer, and the second inorganic layer is disposed on the organic layer; when the touch structure layer is subjected to a pressing force, at least one of the first touch electrode and the second touch electrode is reused as a first pressure-sensitive electrode, and the cathode is reused as a second pressure-sensitive electrode; and An optical adhesive layer is disposed on the side of the touch structure layer near the encapsulation structure layer, and the touch structure layer is attached to the top of the encapsulation structure layer through the optical adhesive layer; A polarizing layer is disposed between the encapsulation structure layer and the optical adhesive layer. The polarizing layer includes a pressure-sensitive adhesive layer disposed on the encapsulation structure layer, and the pressure-sensitive adhesive layer has openings. The first pressure-sensitive electrode and the second pressure-sensitive electrode form a capacitive pressure-sensitive touch. The display module also includes a deformation film layer, which is disposed between the cathode and the touch structure layer. The deformation film layer is a flexible layer and is the optical adhesive layer. The deformation film layer has a plurality of spaced openings. The elastic modulus of the deformation film layer is less than 3 gigapascals.

2. The display module as described in claim 1, characterized in that, The deformation film layer includes a first deformation strip and a second deformation strip, wherein the first deformation strip extends along a first direction and the second deformation strip extends along a second direction intersecting the first direction; Multiple first deformation strips and multiple second deformation strips are cross-connected to form multiple openings.

3. The display module as described in claim 1, characterized in that, When the touch structure layer is subjected to a pressing force, both the first touch electrode and the second touch electrode are reused as the first pressure-sensitive electrode.

4. The display module as described in claim 1, characterized in that, The touch structure layer further includes an insulating layer disposed between the first touch electrode and the second touch electrode.

5. The display module as described in claim 1, characterized in that, The touch structure layer further includes an insulating layer and a bridge. The first touch electrode and the second touch electrode are disposed in the same layer. The insulating layer is disposed on the first touch electrode and the second touch electrode. The bridge is disposed on the insulating layer and connects two adjacent second touch electrodes.

6. A display device, characterized in that, It includes a display module and a backlight module, wherein the display module is disposed on the backlight module, and the display module is the display module according to any one of claims 1 to 5.

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