Display module and display device

Abstract

The invention provides a display module and a display device. The display module comprises a display panel, a touch panel arranged on one side of the display panel and a color film panel arranged on the side, away from the display panel, of the touch panel. The touch panel includes a first electrode layer, a piezoelectric film, and a second electrode layer. The first electrode layer is arranged on the surface, facing the color film panel, of the display panel. The piezoelectric film is arranged on the side, away from the display panel, of the first electrode layer. The second electrode layer is arranged on the side, away from the first electrode layer, of the piezoelectric film. The piezoelectric film is integrated in the touch panel, and the light refracted by the piezoelectric film is absorbed or filtered through the color film panel, so that the thickness and the weight of the display panel are reduced while the touch function and the pressure detection function are ensured.

Description

Technical Field

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

[0002] With the development of science and technology, the degree of intelligence and thinness of touch display modules is constantly improving. The touch display module includes a display panel, a touch sensing layer and a pressure sensing layer stacked in sequence, so as to detect the touch position through the touch sensing layer and detect the touch pressure through the pressure sensing layer. However, the above touch display module is thick and heavy, which is not conducive to the thinness of the panel. Summary of the invention

[0003] The object of the present invention is to provide a display module and a display device to solve the problem that the existing touch display module is thick and heavy.

[0004] To achieve the above objective, the present invention provides a display module, which includes a display panel, a touch panel disposed on one side of the display panel, and a color film panel disposed on a side of the touch panel away from the display panel.

[0005] The touch panel includes a first electrode layer, a piezoelectric film, and a second electrode layer. The first electrode layer is disposed on a surface of the display panel facing the color filter panel. The piezoelectric film is disposed on a side of the first electrode layer away from the display panel. The second electrode layer is disposed on a side of the piezoelectric film away from the first electrode layer.

[0006] Further, the first electrode layer includes a plurality of first touch electrodes and a plurality of first pressure electrodes, and the second electrode layer includes a plurality of second touch electrodes and a plurality of second pressure electrodes. The orthographic projection of the first touch electrode on the display panel overlaps with the orthographic projection of the second touch electrode on the display panel. The orthographic projection of the first pressure electrode on the display panel overlaps with the orthographic projection of the second pressure electrode on the display panel.

[0007] Further, the first touch electrodes and the first pressure electrodes are arranged at intervals along a first direction and extend along a second direction perpendicular to the first direction. The second touch electrodes and the second pressure electrodes are arranged at intervals along the second direction and extend along the first direction.

[0008] Further, the piezoelectric film includes a plurality of piezoelectric parts and dielectric parts arranged at intervals. The orthographic projections of the first pressure electrode and the second pressure electrode on the display panel overlap with the orthographic projections of the piezoelectric part on the display panel. The orthographic projections of the first touch electrode and the second touch electrode on the display panel overlap with the orthographic projections of the dielectric part on the display panel. Preferably, the material of the dielectric part includes at least one of an inorganic material and an organic material.

[0009] Furthermore, the material of the piezoelectric film includes a ferroelectric polymer. Preferably, the ferroelectric polymer includes at least one of polyvinylidene fluoride, polytrifluoroethylene, a copolymer of polyvinylidene fluoride and trifluoroethylene, and polyurethane.

[0010] Furthermore, the thickness of the piezoelectric film is 0.1-10 microns.

[0011] Furthermore, the color filter panel includes a black matrix and a color resist layer. The black matrix is ​​arranged on a side of the second electrode layer away from the piezoelectric film and has a plurality of light-transmitting holes. The color resist layer fills the light-transmitting holes.

[0012] Furthermore, the display panel includes an array substrate, a light-emitting layer disposed on a side of the array substrate facing the color film panel, and a packaging layer disposed on a side of the light-emitting module away from the array substrate.

[0013] Furthermore, the display module further comprises a cover plate disposed on a side of the color filter panel away from the touch panel. Preferably, the display module further comprises an adhesive layer disposed on a side of the cover plate facing the color filter panel. Further preferably, the adhesive layer is made of optical glue.

[0014] The present invention further provides a display device, which includes the display module as described above.

[0015] The advantages of the present invention are: in a display module and a display device of the present invention, the light refracted by the piezoelectric film is absorbed or filtered by the color film panel, which is conducive to integrating the piezoelectric film into the touch panel, while ensuring the touch function and pressure detection function, reducing the thickness and weight of the display panel, thereby realizing the lightness and thinness of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1It is a schematic diagram of the layered structure of the display module in Embodiment 1 or Embodiment 2 of the present invention;

[0018] Figure 2 It is an enlarged schematic diagram of the layered structure of the touch panel in Embodiment 1 of the present invention;

[0019] Figure 3 Schematic diagram of the electrode arrangement of the first electrode layer in Example 1 or Example 2 of the present invention;

[0020] Figure 4 Schematic diagram of the electrode arrangement of the second electrode layer in Embodiment 1 or Embodiment 2 of the present invention;

[0021] Figure 5 It is an enlarged schematic diagram of the layered structure of the touch panel in Embodiment 2 of the present invention.

[0022] The components in the figure are shown as follows:

[0023] Display module 1; Display panel 10;

[0024] Array substrate 11; Light emitting layer 12;

[0025] Red light emitting device 12R; Green light emitting device 12G;

[0026] Blue light emitting device 12B; Encapsulation layer 13;

[0027] Touch panel 20; First electrode layer 21;

[0028] A first touch electrode 211; A first pressure electrode 212;

[0029] Piezoelectric film 22; Piezoelectric portion 221;

[0030] Dielectric portion 222; Second electrode layer 23;

[0031] Second touch electrode 231; Second pressure electrode 232;

[0032] Color film panel 30; Black matrix 31;

[0033] Color resist layer 32; Red color resist 32R;

[0034] Green color resist 32G; Blue color resist 32B;

[0035] Cover plate 40; Adhesive layer 41. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below with reference to the drawings in the specification to prove that the present invention can be implemented. The embodiments of the invention can fully introduce the present invention to those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied through many different forms of embodiments of the invention, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0037] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0038] In addition, the following descriptions of the various embodiments of the invention are made with reference to the attached diagrams to illustrate specific embodiments of the invention that the present invention can be implemented with. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted on" or "connected to" another component, the two may be understood to be directly "mounted on" or "connected", or one component may be indirectly "mounted on" or "connected to" another component via an intermediate component.

[0040] Example 1

[0041] In the display module provided by the related art, a touch sensor, a piezoelectric sensor and a circular polarizer to reduce light reflection are usually provided. However, due to the material and process limitations of the piezoelectric film in the piezoelectric sensor, the piezoelectric film is very prone to birefringence. In order to prevent the double reflection of the piezoelectric film from affecting the anti-reflection effect of the circularly polarized light, the piezoelectric film needs to be provided on the light-emitting side of the circular polarizer (i.e., the side of the circular polarizer away from the display panel), thereby making it impossible for the piezoelectric sensor to be integrated into the display panel, which is not conducive to the thinness of the display module. At the same time, in order to compensate for the refractive index of the piezoelectric film, the display module provided by the related art is preferably provided with a phase difference film. Although it can alleviate the birefringence problem of the piezoelectric film, it also further increases the overall thickness of the display module, which is not conducive to the thinness of the display panel.

[0042] In view of the above problems, an embodiment of the present invention provides a display module 1, such as Figure 1 and Figure 2 As shown, the display module 1 includes a display panel 10 , a touch panel 20 , a color film panel 30 and a cover plate 40 which are stacked in sequence.

[0043] The display panel 10 includes an array substrate 11, a light-emitting layer 12 and an encapsulation layer 13. The array substrate 11 is provided with a plurality of TFT (Thin Film Transistor) devices arranged in an array. The light-emitting layer 12 is provided on the side of the array substrate 11 facing the color filter panel 30, and includes a plurality of light-emitting devices, each of which is electrically connected to a corresponding TFT device, and is electrically conductive and emits light under the control of the TFT device, thereby providing a display light source for the display module 1. The encapsulation layer 13 is provided on the side of the light-emitting layer 12 away from the array substrate 11, and is prepared by TFE (Thin Film Encapsulation) process, and is used to encapsulate and protect the light-emitting layer 12 and the array substrate 11, and prevent water and oxygen from invading and corroding the devices in the display panel 10.

[0044] The touch panel 20 is arranged on one side of the encapsulation layer 13 of the display panel 10 through the TOE (Touch panel on Encapsulation) process, and includes a first electrode layer 21, a piezoelectric film 22, and a second electrode layer 23 stacked in sequence. The first electrode layer 21 is arranged on the surface of the encapsulation layer 13 away from the light-emitting layer 12, and includes a plurality of first touch electrodes 211 and a first pressure electrode 212 arranged in the same layer. The second electrode layer 23 is arranged on the side of the first electrode layer 21 away from the display panel 10, and includes a plurality of second touch electrodes 231 and a second pressure electrode 232 arranged in the same layer. The piezoelectric film 22 is arranged between the first electrode layer 21 and the second electrode layer 23.

[0045] The orthographic projection of the first touch electrode 211 on the display panel 10 overlaps with the orthographic projection of the second touch electrode 231 on the display panel 10, so that a touch sensor is formed between the first touch electrode 211 and the second touch electrode 231. In the embodiment of the present invention, the first touch electrode 211 is a sensing electrode (Receiver, referred to as RX) in the touch sensor, and the second touch electrode 231 is a driving electrode (Transmitter, referred to as TX) in the touch sensor. When a finger touches the display module 1, the capacitance between the first touch electrode 211 and the second touch electrode 231 changes, and the display module 1 obtains the specific position touched by the finger by obtaining the change in capacitance between the first touch electrode 211 and the second touch electrode 231 before and after the touch.

[0046] The orthographic projection of the first pressure electrode 212 on the display panel 10 overlaps with the orthographic projection of the second pressure electrode 232 on the display panel 10, so that a pressure sensor is formed between the first pressure electrode 212, the second pressure electrode 232 and the piezoelectric film 22. In the embodiment of the present invention, the first pressure electrode 212 is a sensing electrode in the pressure sensor, and the second pressure electrode 232 is a driving electrode in the pressure sensor. When a finger presses the display module 1, the piezoelectric film 22 is deformed under the action of the finger pressure, and induced charges are generated on the upper and lower surfaces of the piezoelectric film 22. The first pressure electrode 212 and the second pressure electrode 232 pick up these induced charges to form a piezoelectric signal, and the display module 1 obtains the magnitude of the pressure induction through the received piezoelectric signal.

[0047] Specifically, Figure 3 The arrangement relationship of the electrodes in the first electrode layer 21 is shown in FIG. Figure 4 2 shows the arrangement relationship of the electrodes in the second electrode layer 23. In the first electrode layer 21, the first touch electrodes 211 and the first pressure electrodes 212 are arranged at intervals along the first direction X, and extend along the second direction Y perpendicular to the first direction X. In the second electrode layer 23, the second touch electrodes 231 and the second pressure electrodes 232 are arranged at intervals along the second direction Y, and extend along the first direction X.

[0048] Furthermore, the thickness of the piezoelectric film 22 is 0.1-10 microns, for example, its thickness can be 1 micron, 3 microns or 7 microns. The piezoelectric film 22 includes at least one of transparent ferroelectric polymers, such as polyvinylidene fluoride (PVDF), polytrifluoroethylene (PCTFE), copolymer of polyvinylidene fluoride and trifluoroethylene (P(VDF-TrFE)), polyurethane (PU) and other ferroelectric polymers. The piezoelectric film 22 can be prepared by a coating process, and the coating process uses one of the coating processes such as slit coating, spin coating, inkjet and the like. The first electrode layer 21 and the second electrode layer 23 are made of a conductive material, such as conductive metals such as silver, aluminum, copper, nickel, molybdenum and their oxides. Preferably, the first electrode layer 21 and the second electrode layer 23 can be a grid structure, so as to improve the light transmittance and reduce the influence of the first electrode layer 21 and the second electrode layer 23 on the brightness of the display module 1.

[0049] In the embodiment of the present invention, the first pressure electrode 212, the second pressure electrode 232 and the piezoelectric film 22 constituting the piezoelectric sensor are integrated in the touch panel 20, and the first pressure electrode 212 and the first touch electrode 211, and the second pressure electrode 232 and the second touch electrode 231 are prepared in the same layer, which can reduce the thickness and weight of the display module 1 while reducing the preparation process and improving the production efficiency. At the same time, the piezoelectric film 22 replaces the original insulating film layer and is arranged between the first electrode layer 21 and the second electrode layer 23, which can further reduce the thickness of the display module 1.

[0050] The color filter panel 30 is arranged on the side of the touch panel 20 away from the display panel 10 through the COE (Color filter on Encapsulation) process, and includes a black matrix 31 and a color resist layer 32. The black matrix 31 is arranged on the side of the second electrode layer 23 away from the piezoelectric film 22, and has a plurality of light-transmitting holes, and the orthographic projection of each light-transmitting hole on the array substrate 11 overlaps with the orthographic projection of the corresponding light-emitting device in the light-emitting layer 12 on the array substrate 11. The black resist layer 32 is made of a light-shielding material, which is used to absorb light and prevent the edges of adjacent sub-pixels from generating cross-color, thereby improving the picture contrast of the display module 1. The color resist layer 32 is filled in each light-transmitting hole of the black matrix 31. Specifically, the light-emitting device includes a red light-emitting device 12R, a green light-emitting device 12G, and a blue light-emitting device 12B, which are respectively used to generate light of corresponding colors; the color resistance layer 32 includes a red color resistance 32R, a green color resistance 32G, and a blue color resistance 32B; wherein the red color resistance 32R is arranged in the light-transmitting hole corresponding to the red light-emitting device 12R, the green color resistance 32G is arranged in the light-transmitting hole corresponding to the green light-emitting device 12G, and the blue color resistance 32B is arranged in the light-transmitting hole corresponding to the blue light-emitting device 12B. The color resistance layer 32 is used to filter the light into corresponding colors, thereby further improving the picture contrast of the display module 1.

[0051] In the embodiment of the present invention, the color filter panel 30 prepared by the COE process can replace the circular polarizer in the existing display module, which can not only achieve anti-reflection, but also improve the light transmittance, and can also improve the display effect and reduce power consumption while reducing the thickness of the display module 1. At the same time, the black matrix 31 and the color resistance layer 32 in the color filter panel 30 can also absorb or filter the light refracted by the piezoelectric film 22, so that the optical film (such as the phase difference film) used in the existing display module to compensate for the refractive index of the piezoelectric touch can be further removed, and the overall thickness of the display module 1 can be further reduced, so as to achieve the thinness of the display module 1.

[0052] The cover glass 40 (CG for short) is disposed on the side of the color filter panel 30 away from the touch panel 20, and is used to protect the surface of the display module 1, prevent the display module 1 from being scratched, and improve the wear resistance of the surface of the display module 1. Furthermore, an adhesive layer 41 is disposed on the surface of the cover glass 40 facing the color filter panel 30, and the adhesive layer 41 is used to adhere the cover glass 40 to a surface of the color filter panel 30 away from the display panel 10, and the adhesive layer 41 may be made of an optically clear adhesive (OCA for short).

[0053] The present invention also provides a display device in an embodiment, which includes the display module as described above, and the display module is used to provide a display image for the display device. The display device can be any display device with a display function, such as a mobile phone, a laptop computer, a tablet computer, a car display, etc.

[0054] In the display module provided in the embodiment of the present invention, the circular polarizer in the prior art is replaced by a color film panel, which can prevent reflection, improve light transmittance, and reduce the thickness of the display module. At the same time, the color film panel can also absorb or filter the light refracted by the piezoelectric film, which is conducive to integrating the piezoelectric film into the touch panel, thereby removing the optical film in the existing display module and the insulating film layer in the existing touch panel, further reducing the thickness and weight of the display panel while ensuring the touch function and pressure detection function, and realizing the thinness of the display module.

[0055] Example 2

[0056] In an embodiment of the present invention, a display module 1 is provided, such as Figure 1 and Figure 5 As shown, the display module 1 includes a display panel 10 , a touch panel 20 , a color film panel 30 and a cover plate 40 which are stacked in sequence.

[0057] The display panel 10 includes an array substrate 11, a light-emitting layer 12 and an encapsulation layer 13. The array substrate 11 is provided with a plurality of TFT devices arranged in an array. The light-emitting layer 12 is provided on the side of the array substrate 11 facing the color film panel 30, and includes a plurality of light-emitting devices, each of which is electrically connected to a corresponding TFT device, and is electrically conductive and emits light under the control of the TFT device, thereby providing a display light source for the display module 1. The encapsulation layer 13 is provided on the side of the light-emitting layer 12 away from the array substrate 11, and is prepared by TFE process, and is used to encapsulate and protect the light-emitting layer 12 and the array substrate 11, and prevent water and oxygen from invading and corroding the devices in the display panel 10.

[0058] The touch panel 20 is arranged on one side of the encapsulation layer 13 of the display panel 10 through the TOE process, and includes a first electrode layer 21, a piezoelectric film 22, and a second electrode layer 23 which are stacked in sequence. The first electrode layer 21 is arranged on the surface of the encapsulation layer 13 away from the light-emitting layer 12, and includes a plurality of first touch electrodes 211 and a first pressure electrode 212 arranged in the same layer. The second electrode layer 23 is arranged on the side of the first electrode layer 21 away from the display panel 10, and includes a plurality of second touch electrodes 231 and a second pressure electrode 232 arranged in the same layer. The piezoelectric film 22 is arranged between the first electrode layer 21 and the second electrode layer 23, and includes a plurality of piezoelectric portions 221 and a dielectric portion 222 arranged at intervals. The piezoelectric portion 221 includes a transparent ferroelectric polymer, such as at least one of ferroelectric polymers such as polyvinylidene fluoride (PVDF), polytrifluoroethylene (PCTFE), a copolymer of polyvinylidene fluoride and trifluoroethylene (P(VDF-TrFE)), and polyurethane (PU). The dielectric part 222 includes at least one of dielectric materials such as inorganic materials and organic materials. For example, the inorganic material can be at least one of silicon oxide (SiOx), silicon nitride (SiNx) and silicon nitride oxide (SiON), and the organic material can be at least one of acrylic acid, epoxy resin and silicone.

[0059] The orthographic projection of the first pressure electrode 212 on the display panel 10 overlaps with the orthographic projection of the second pressure electrode 232 on the display panel 10, and the orthographic projection of the piezoelectric portion 221 on the display panel 10 overlaps with the orthographic projection of the first pressure electrode 212 and the second pressure electrode 232 on the display panel 10, so that a pressure sensor is formed between the first pressure electrode 212, the second pressure electrode 232 and the corresponding piezoelectric portion 221. In an embodiment of the present invention, the first pressure electrode 212 is a sensing electrode in the pressure sensor, and the second pressure electrode 232 is a driving electrode in the pressure sensor. When a finger presses the display module 1, the corresponding piezoelectric portion 221 in the piezoelectric film 22 is deformed under the action of the finger pressure, and induced charges are generated on the upper and lower surfaces of the piezoelectric portion 221. The first pressure electrode 212 and the second pressure electrode 232 pick up these induced charges to form a piezoelectric signal, and the display module 1 obtains the magnitude of the pressure induction through the received piezoelectric signal. Preferably, the orthographic projection area of ​​the piezoelectric portion 221 on the display panel 10 is equal to the orthographic projection areas of the first pressure electrode 212 and the second pressure electrode 232 on the display panel 10 .

[0060] The orthographic projection of the first touch electrode 211 on the display panel 10 overlaps with the orthographic projection of the second touch electrode 231 on the display panel 10, so that a touch sensor is formed between the first touch electrode 211 and the second touch electrode 231. In the embodiment of the present invention, the first touch electrode 211 is a sensing electrode in the touch sensor, and the second touch electrode 231 is a driving electrode in the touch sensor. When a finger touches the display module 1, the capacitance between the first touch electrode 211 and the second touch electrode 231 changes, and the display module 1 obtains the specific position touched by the finger by obtaining the change in capacitance between the first touch electrode 211 and the second touch electrode 231 before and after the touch. At the same time, the orthographic projections of the first touch electrode 211 and the second touch electrode 231 on the display panel 10 overlap with the orthographic projections of the dielectric portion 222 on the display panel 10, and the piezoelectric portion 221 is separated from the first touch electrode 211 and the second touch electrode 231 by the dielectric portion 222, thereby preventing the first touch electrode 211 and the second touch electrode 231 from also acquiring the induced charges generated in the piezoelectric portion 221, thereby improving the sensitivity and accuracy of touch sensing. Preferably, the orthographic projection area of ​​the dielectric portion 222 on the display panel 10 is larger than the orthographic projections of the first touch electrode 211 and the second touch electrode 231 on the display panel 10, thereby prompting the dielectric portion 222 to be connected to the adjacent piezoelectric portion 221.

[0061] Specifically, Figure 3 The arrangement relationship of the electrodes in the first electrode layer 21 is shown in FIG. Figure 42 shows the arrangement relationship of the electrodes in the second electrode layer 23. In the first electrode layer 21, the first touch electrodes 211 and the first pressure electrodes 212 are arranged at intervals along the first direction X, and extend along the second direction Y perpendicular to the first direction X. In the second electrode layer 23, the second touch electrodes 231 and the second pressure electrodes 232 are arranged at intervals along the second direction Y, and extend along the first direction X.

[0062] Furthermore, the thickness of the piezoelectric film 22 is 0.1-10 microns, for example, its thickness can be 1 micron, 3 microns or 7 microns. Among them, the piezoelectric part 221 can be prepared by a coating process or an inkjet process, and the coating process selects one of the coating processes such as slit coating and spin coating; the dielectric part 222 can be prepared by a sputtering process, a deposition process or a coating process. The first electrode layer 21 and the second electrode layer 23 are made of conductive materials, such as conductive metals such as silver, aluminum, copper, nickel, molybdenum and their oxides. Preferably, the first electrode layer 21 and the second electrode layer 23 can be a grid structure, so as to improve the light transmittance and reduce the influence of the first electrode layer 21 and the second electrode layer 23 on the brightness of the display module 1.

[0063] In the embodiment of the present invention, the first pressure electrode 212, the second pressure electrode 232 and the piezoelectric film 22 constituting the piezoelectric sensor are integrated in the touch panel 20, the first pressure electrode 212 and the first touch electrode 211 are prepared in the same layer, and the second pressure electrode 232 and the second touch electrode 231 are prepared in the same layer, which can reduce the thickness of the display module 1 while reducing the preparation process and improving the production efficiency. At the same time, the piezoelectric film 22 replaces the original insulating film layer and is arranged between the first electrode layer 21 and the second electrode layer 23, which can further reduce the thickness of the display module 1.

[0064] The color filter panel 30 is arranged on the side of the touch panel 20 away from the display panel 10 through the COE process, and includes a black matrix 31 and a color resist layer 32. The black matrix 31 is arranged on the side of the second electrode layer 23 away from the piezoelectric film 22, and has a plurality of light-transmitting holes, and the orthographic projection of each light-transmitting hole on the array substrate 11 overlaps with the orthographic projection of the corresponding light-emitting device in the light-emitting layer 12 on the array substrate 11. The black resist layer 32 is made of a light-shielding material, which is used to absorb light and prevent the edges of adjacent sub-pixels from generating cross-color, thereby improving the picture contrast of the display module 1. The color resist layer 32 is filled in each light-transmitting hole of the black matrix 31, which is used to filter the light into the corresponding color, thereby further improving the picture contrast of the display module 1.

[0065] In the embodiment of the present invention, the color filter panel 30 prepared by the COE process can replace the circular polarizer in the existing display module 1, which can not only achieve anti-reflection, but also improve the light transmittance, and can also improve the display effect and reduce power consumption while reducing the thickness of the display module 1. At the same time, the black matrix 31 and the color resistance layer 32 in the color filter panel 30 can also absorb or filter the light refracted by the piezoelectric film 22, so that the optical film (such as the phase difference film) used to compensate the refractive index of the piezoelectric film in the existing display module 1 can be further removed, and the overall thickness of the display module 1 can be further reduced, so as to achieve the thinness of the display module 1.

[0066] The cover plate 40 is disposed on a side of the color film panel 30 away from the touch panel 20, and is used to protect the surface of the display module 1, prevent the display module 1 from being scratched, and improve the wear resistance of the surface of the display module 1. Furthermore, an adhesive layer 41 is disposed on the surface of the cover plate 40 facing the color film panel 30, and the adhesive layer 41 is used to adhere the cover plate 40 to a surface of the color film panel 30 away from the display panel 10, and the material of the adhesive layer 41 may be optical adhesive.

[0067] In the display module provided in the embodiment of the present invention, the structure of the piezoelectric film is further optimized. Compared with the full ferroelectric polymer type piezoelectric film provided in the embodiment 1 of the present invention, the piezoelectric film in the embodiment of the present invention is designed to be partitioned, and only the piezoelectric part containing the ferroelectric polymer is set between the first pressure electrode and the second pressure electrode, while the dielectric part set between the first touch electrode and the second touch electrode does not contain the ferroelectric polymer. Therefore, when the finger presses the display module, the dielectric part between the first touch electrode and the second touch electrode will not generate induced charges, thereby completely separating the touch sensing and pressure sensing, and achieving all the technical effects in the embodiment 1 while preventing the crosstalk between the two sensing methods, and realizing independent detection of each signal.

[0068] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A display module, characterized in that: include: Display panel; A touch panel, disposed on one side of the display panel; A color film panel, arranged on a side of the touch panel away from the display panel; The touch panel comprises: A first electrode layer is provided on a surface of the display panel facing the color filter panel; A piezoelectric film is provided on a side of the first electrode layer away from the display panel; The second electrode layer is arranged on a side of the piezoelectric film away from the first electrode layer.

2. The display module according to claim 1, wherein: The first electrode layer includes a plurality of first touch electrodes and a plurality of first pressure electrodes, and the second electrode layer includes a plurality of second touch electrodes and a plurality of second pressure electrodes; The orthographic projection of the first touch electrode on the display panel overlaps with the orthographic projection of the second touch electrode on the display panel; An orthographic projection of the first pressure electrode on the display panel overlaps with an orthographic projection of the second pressure electrode on the display panel.

3. The display module according to claim 2, wherein: The first touch electrodes and the first pressure electrodes are arranged at intervals along a first direction and extend along a second direction perpendicular to the first direction; The second touch electrodes and the second pressure electrodes are arranged at intervals along the second direction and extend along the first direction.

4. The display module according to claim 2, wherein: The piezoelectric film includes a plurality of piezoelectric portions and dielectric portions arranged at intervals; The orthographic projections of the first pressure electrode and the second pressure electrode on the display panel overlap with the orthographic projection of the piezoelectric portion on the display panel; The orthographic projections of the first touch electrode and the second touch electrode on the display panel overlap with the orthographic projection of the dielectric portion on the display panel; Preferably, the material of the dielectric part includes at least one of an inorganic material and an organic material.

5. The display module according to claim 1, wherein: The material of the piezoelectric film includes a ferroelectric polymer; Preferably, the ferroelectric polymer includes at least one of polyvinylidene fluoride, polytrifluoroethylene, a copolymer of polyvinylidene fluoride and trifluoroethylene, and polyurethane.

6. The display module according to claim 1, wherein: The thickness of the piezoelectric film is 0.1-10 microns.

7. The display module according to claim 1, wherein: The color film panel comprises: A black matrix is ​​disposed on a side of the second electrode layer away from the piezoelectric film and has a plurality of light-transmitting holes; The color resist layer fills the light-transmitting hole.

8. The display module according to claim 1, wherein: The display panel comprises: An array substrate; A light-emitting layer, disposed on a side of the array substrate facing the color filter panel; The packaging layer is arranged on a side of the light emitting module away from the array substrate.

9. The display module according to claim 1, wherein: Also includes: A cover plate, arranged on a side of the color film panel away from the touch panel; Preferably, the display module further comprises an adhesive layer provided on a side of the cover plate facing the color film panel; Further preferably, the material of the adhesive layer includes optical glue.

10. A display device, characterized in that: Comprising a display module as described in any one of claims 1-9.

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