CN117706818A - Display module and display device - Google Patents

Abstract

The application discloses a display module and a display device, wherein the display module comprises a substrate, a driving circuit layer, a first diffusion sheet and a second diffusion sheet, and the driving circuit layer is arranged on one side of the substrate; the first diffusion sheet is arranged on one side of the driving circuit layer, which is far away from the substrate; the second diffusion sheet is arranged on one side of the first diffusion sheet far away from the driving circuit layer; the first light-transmitting protective film and the second light-transmitting protective film are arranged between the first diffusion sheet and the second diffusion sheet in a relative mode; the first light-transmitting protective film and the second light-transmitting protective film are both in the shape of waves, and the waves comprise wave crests and wave troughs which are sequentially arranged at intervals. The display module can resist deformation caused by pressing, so that the problem of scratch moire (Trace mura) caused by pressing a screen is prevented.

Description

Display module and display device

Technical Field

The application relates to the technical field of display, in particular to a display module and a display device.

Background

Trace mura (scratch moire) is a poor display, and is that after a screen is pressed or slid by a hand or other objects, a mark which is not easy to disappear is generated on the screen, and the poor display can affect the normal display of the screen.

In the display module of the related art, the module glass is deformed when touched, thereby forming Trace mura caused by pressing.

Disclosure of Invention

Accordingly, the present application provides a display module and a display device, which solve the problem of Trace mura caused by pressing or sliding a screen by the display module in the prior art.

In order to solve the technical problem, the first technical scheme provided by the application is as follows: the display module comprises a substrate, a driving circuit layer, a first diffusion sheet and a second diffusion sheet, wherein the driving circuit layer is arranged on one side of the substrate; the first diffusion sheet is arranged on one side of the driving circuit layer away from the substrate; the second diffusion sheet is arranged on one side of the first diffusion sheet far away from the driving circuit layer; a first light-transmitting protective film and a second light-transmitting protective film which are oppositely arranged are arranged between the first diffusion sheet and the second diffusion sheet; the first light-transmitting protective film and the second light-transmitting protective film are both in a wave shape, and the wave shape comprises wave crests and wave troughs which are sequentially arranged at intervals; in a normal display state, the wave crest of the first light-transmitting protective film and the wave crest of the second light-transmitting protective film are correspondingly arranged; and in a state of receiving a touch pressing signal, the wave crest of the first light-transmitting protective film is arranged corresponding to the wave trough of the second light-transmitting protective film.

In an embodiment, the shapes of the first light-transmitting protective film and the second light-transmitting protective film are U-shaped waves, and the U-shaped waves are provided with rounded wave crests and rounded wave troughs which are sequentially arranged at intervals; in a normal display state, the wave crest of the U-shaped wave shape of the first light-transmitting protective film is arranged corresponding to the wave crest of the U-shaped wave shape of the second light-transmitting protective film; and in a state of receiving a touch pressing signal, the wave crest of the U-shaped wave shape of the first light-transmitting protective film is arranged corresponding to the wave trough of the U-shaped wave shape of the second light-transmitting protective film.

In an embodiment, the display module further includes a brightness enhancement film, the brightness enhancement film is disposed on a side of the driving circuit layer away from the substrate, and the driving circuit layer is disposed between the substrate and the brightness enhancement film; wherein, the brightness enhancement film is attached to the substrate.

In an embodiment, the display module further includes a first expansion plate, a second expansion plate, and a connection frame, where the first expansion plate is disposed at two ends of the first diffusion sheet along a first direction; the second expansion plates are arranged at two ends of the second diffusion sheet along the first direction; the connecting frame is arranged at two ends of the first diffusion sheet and the second diffusion sheet along the second direction; wherein the connecting frame connects the first expansion plate and the second expansion plate in the second direction; the first and second expansion plates are configured to be elongated or shortened in a state of receiving a touch press signal; the first direction is perpendicular to the second direction.

In an embodiment, the materials of the first light-transmitting protective film and the second light-transmitting protective film are transparent polyester.

In an embodiment, the connection frame, the first expansion plate, the second expansion plate, the first diffusion sheet and the second diffusion sheet enclose a diffusion system with a closed space, transparent liquid is filled in the closed space, and the transparent liquid, the first light-transmitting protective film and the second light-transmitting protective film are all arranged in the closed space; wherein the refractive index of the transparent liquid is the same as or similar to that of the transparent polyester.

In one embodiment, the transparent liquid material is chloroform; the first expansion plate and the second expansion plate are made of piezoelectric ceramics.

In an embodiment, the display module further includes a plurality of light emitting units, a reflective layer and a back plate, where the plurality of light emitting units are disposed at intervals on a side of the second diffusion sheet away from the first diffusion sheet; the reflecting layer is arranged on one side of the plurality of light-emitting units, which is far away from the second diffusion sheet; the backboard comprises a bottom board and side boards, and the bottom board is arranged on one side of the reflecting layer far away from the light-emitting unit; the side plates extend from the bottom plate to the connecting frame and cover the connecting frame; wherein, a light emitting surface is formed on one side of the light emitting units far away from the bottom plate.

In an embodiment, the display module further includes: the first polaroid is arranged on one side of the substrate far away from the driving circuit layer; the second polaroid is arranged between the driving circuit layer and the brightness enhancement film and is opposite to the first polaroid; wherein, the first polarizer and the second polarizer are both one type of light which only allows light with a single polarization direction to pass through.

In order to solve the technical problem, the second technical scheme provided by the application is as follows: the display device comprises a touch module and a display module, wherein the display module is electrically connected with the touch module; the display module is any one of the display modules.

The beneficial effects of this application: compared with the prior art, the display module comprises a substrate, a driving circuit layer, a first diffusion sheet and a second diffusion sheet, wherein the driving circuit layer is arranged on one side of the substrate; the first diffusion sheet is arranged on one side of the driving circuit layer, which is far away from the substrate; the second diffusion sheet is arranged on one side of the first diffusion sheet far away from the driving circuit layer; the first light-transmitting protective film and the second light-transmitting protective film are arranged between the first diffusion sheet and the second diffusion sheet in a relative mode; the first light-transmitting protective film and the second light-transmitting protective film are both in the shape of waves, and the waves comprise wave crests and wave troughs which are sequentially arranged at intervals. In the normal display state, the wave crest of the first light-transmitting protective film and the wave crest of the second light-transmitting protective film are correspondingly arranged; in a state of receiving the touch pressing signal, the peaks of the first light-transmitting protective film are disposed corresponding to the valleys of the second light-transmitting protective film, so that the substrate can resist deformation caused by pressing, thereby preventing the problem of scratch moire (Trace mura) caused by pressing the screen.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a display module provided in the present application in a normal state;

fig. 2 is a schematic structural diagram of the display module provided in the present application in a touch-pressed state;

FIG. 3 is an enlarged schematic view of the portion A of FIG. 1;

FIG. 4 is an enlarged schematic view of the portion A' of FIG. 2;

fig. 5 is a schematic diagram of a display device provided in the present application.

Reference numerals illustrate:

200. a display device; 201. a touch control module; 100. a display module; 10. a substrate; 101. an adhesive layer; 102. a first polarizer; 103. a second polarizer; 11. a color film substrate; 12. an array substrate; 20. a driving circuit layer; 30. a diffusion system; 31. a first diffusion sheet; 32. a second diffusion sheet; 33. a first expansion plate; 34. a second expansion plate; 35. a connection frame; 36. a closed space; 40. a light enhancement film; 50. a diffusion plate; 61. a first light-transmitting protective film; 611. a first peak; 612. a first trough; 62. a second light-transmitting protective film; 621. a second peak; 622. a second trough; 63. a transparent liquid; 70. a back plate; 71. a bottom plate; 72. a side plate; 80. a reflective layer; 90. a light emitting unit; 91. a support frame; l1, a first length; l2, a second length; l3, third length; l4, fourth length.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "first," "second," and the like, herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", or "first" may include at least one such feature, either explicitly or implicitly. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

With the development of new energy automobiles, the touch screen becomes an automobile standard configuration. An IPS (In-Plane Switching) screen is widely used for In-vehicle display due to characteristics of high response speed, high transmittance, and the like. IPS is particularly serious because of its liquid crystal alignment structure, which is prone to mura when deformed by touch pressure, especially when it is used for black pictures. Because automobiles are often used in outdoor environments, the brightness of the display screen needs to be very high, typically greater than 1000nit. IPS screen press mura is more serious under high brightness conditions. Thus pressing mura is a currently important soft rib of IPS vehicle products.

In the prior art, an air gap (air gap) must be reserved between the glass substrate and the membrane of the liquid crystal module, so as to prevent friction between the polarizer and the membrane at the lower side of the liquid crystal screen in the vibration process of the vehicle and grind the screen. Because of the air gap, the liquid crystal glass is easily deformed in a space below the air gap during touch, and thus a pressing mura is formed.

In order to solve the above problems, the present application provides a new display module and a display device.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a display module provided in the present application in a normal state; fig. 2 is a schematic structural diagram of the display module provided in the present application in a touch-pressed state; FIG. 3 is an enlarged schematic view of the portion A of FIG. 1; fig. 4 is an enlarged schematic view of the structure of the portion a' in fig. 2.

The display module 100 provided in an embodiment of the present application includes a substrate 10, a driving circuit layer 20, a first diffusion sheet 31 and a second diffusion sheet 32, where the driving circuit layer 20 is disposed on one side of the substrate 10; the first diffusion sheet 31 is disposed on a side of the driving circuit layer 20 away from the substrate 10; the second diffusion sheet 32 is disposed on a side of the first diffusion sheet 31 away from the driving circuit layer 20; wherein, a first light-transmitting protective film 61 and a second light-transmitting protective film 62 which are oppositely arranged are arranged between the first diffusion sheet 31 and the second diffusion sheet 32; the first light-transmitting protective film 61 and the second light-transmitting protective film 62 are each in the shape of a wave, and the wave includes peaks and valleys arranged at intervals in order.

Specifically, the first diffusion sheet 31 and the second diffusion sheet 32 are respectively disposed on opposite sides of the driving circuit layer 20, so that the light angle can be adjusted, but the second diffusion sheet 32 is not in contact with the driving circuit layer 20.

In an embodiment, a diffusion plate 50 may be further disposed on a side of the second diffusion plate 32 away from the driving circuit layer 20, and the diffusion plate 50 is disposed on a side of the second diffusion plate 32 away from the first diffusion plate 31; the diffuser plate 50 may be used to adjust the angular beam change of the light distribution curve of the light.

The first and second light-transmitting protective films 61 and 62 are disposed opposite to each other between the first and second diffusion sheets 31 and 32, and the first and second light-transmitting protective films 61 and 62 may each have a wave shape, so that the first and second light-transmitting protective films 61 and 62 each have a peak and a trough. For convenience of explanation, the peaks of the first light-transmitting protective film 61 are defined as first peaks 611 and the valleys are defined as first valleys 612 in the embodiments provided herein. The peaks of the second light-transmitting protective film 62 are defined as second peaks 621, and the valleys are defined as second valleys 622. The first and second light-transmitting protective films 61 and 62 are used to support a gap between the display panel and the backlight module, prevent liquid crystal molecules in the display panel from being deformed when receiving a pressing stress, and prevent the brightness enhancement film from being scratched by friction with a polarizer in the display panel. In addition, the first light-transmitting protective film 61 and the second light-transmitting protective film 62 have the effect of not affecting the light emission in the backlight module because they can allow light to pass through on the basis of protecting the polarizer.

One of the main improvements and inventions of the present application is: the first light-transmitting protective film 61 and the second light-transmitting protective film 62 display different states in the normal display and the pressed state. That is, in the normal display state, the first crest 611 of the first light-transmitting protective film 61 is provided corresponding to the second crest 621 of the second light-transmitting protective film 62; in a state where the touch pressing signal is received, the first peaks 611 of the first light-transmitting protective film 61 are provided corresponding to the second valleys 622 of the second light-transmitting protective film 62. It will be understood that the main body that receives the touch press information may be the driving circuit layer 20, and the driving circuit layer 20 may include a driving chip (not shown) and a printed circuit board (not shown), and the touch press information is received through the driving chip as a control unit (not shown), for example, electrically connected to the driving chip through a sensor (not shown), so that the sensor transmits the touch press information to the driving chip after receiving the touch press information on the substrate 10 or the light-transmitting protective film, thereby controlling the first and second light-transmitting protective films 61 and 62 through the driving chip to perform state adjustment different from the normal display state.

In a further embodiment, the first light-transmitting protective film 61 and the second light-transmitting protective film 62 are each in the shape of a U-shaped wave having rounded peaks and rounded valleys arranged at intervals in sequence; in the normal display state, the first crest 611 of the U-shaped wave shape of the first light-transmitting protective film 61 is provided corresponding to the second crest 621 of the U-shaped wave shape of the second light-transmitting protective film 62; in a state that the display module 100 is touched and pressed, that is, when the driving circuit layer 20 receives information of external touch and pressing, the first wave crest 611 of the U-shaped wave shape of the first light-transmitting protective film 61 is disposed corresponding to the second wave crest 622 of the U-shaped wave shape of the second light-transmitting protective film 62.

In an embodiment, the substrate 10 includes an array substrate 12 and a color film substrate 11 disposed opposite to each other, wherein a liquid crystal layer (not shown) is filled between the array substrate 12 and the color film substrate 11. The array substrate 12 and the color film substrate 11 can both adopt glass as the substrate 10 thereof to prepare other functional layers on the substrate 10 thereof. In the embodiment of the present application, the array substrate 12 is disposed close to the driving circuit layer 20.

In an embodiment, the display module 100 further includes a brightness enhancement film 40, wherein the brightness enhancement film 40 is disposed on a side of the driving circuit layer 20 away from the substrate 10, and the driving circuit layer 20 is disposed between the substrate 10 and the brightness enhancement film 40; the light enhancement film 40 is bonded to the substrate 10.

Specifically, unlike the prior art, the embodiment provided in the present application is that the brightness enhancement film 40 (DEBF, dual brightness enhancement film) is attached to the substrate 10, and it is understood that the zero gap between the substrate 10 and the brightness enhancement film 40 is set, that is, there is no air gap between the glass and the membrane in the prior art. The substrate 10 and the intensifying film 40 which are mutually adhered can primarily improve the resistance to external pressing, and reduce the deformation of the substrate 10 and the pressing mura caused by touch pressing.

In an embodiment, the display module 100 further includes a first expansion plate 33, a second expansion plate 34, and a connection frame 35, where the first expansion plate 33 is disposed at two ends of the first diffusion plate 31 along the first direction; the second expansion plates 34 are disposed at both ends of the second diffusion sheet 32 in the first direction; the connection frame 35 is disposed at both ends of the first diffusion sheet 31 and the second diffusion sheet 32 in the second direction. That is, the first expansion plate 33 and the second expansion plate 34 are connected in the second direction by the connection frame 35. The first direction is perpendicular to the second direction.

Specifically, the first expansion plate 33 and the second expansion plate 34 configured to be expanded or contracted in a state where a touch press signal is received can be understood as: the first and second expansion plates 33 and 34 may apply different voltages to the first and second expansion plates 33 and 34 through the driving circuit layer 20 in a normal display state and in a case of receiving a touch press signal, so that the first and second expansion plates 33 and 34 perform different length displays in two states, respectively.

As shown in fig. 3 and 4, in the normal display state, the length of the first expansion plate 33 is short, which is defined as a first length L1, and when the driving circuit layer 20 receives a touch pressing signal, a first voltage (not shown) is applied to the first expansion plate 33 to extend its length, which is defined as a second length L2. In the normal display state, the length of the second expansion board 34 is long, which is defined as a third length L3, and when the driving circuit layer 20 receives the touch pressing signal, the first voltage is applied to the second expansion board 34, so that the length of the second expansion board 34 is shortened, which is defined as a fourth length L4. And the third length L3 is greater than the first length L1, that is, the length of the second expansion plate 34 is greater than the length of the first expansion plate 33 in the normal display state. When the driving circuit layer 20 receives the touch pressing signal, the second expansion board 34 is controlled to input the first voltage to shorten the length thereof on the basis of the third length L3, thereby reaching the fourth length L4. When the driving circuit layer 20 receives the touch press signal, the first expansion plate 33 is controlled to be elongated to a second length L2 by the voltage, and the second length L2 is the same as the fourth length L4 after the second expansion plate 34 is shortened. So that the first crest 611 of the first expansion plate 33 is disposed corresponding to the second crest 621 of the second light-transmitting protective film 62 in a normal state; in a state where the touch pressing signal is received, the first peaks 611 of the first light-transmitting protective film 61 are provided corresponding to the second valleys 622 of the second light-transmitting protective film 62.

This application is through setting up the crest correspondence of first printing opacity protection film 61 and second printing opacity protection film 62 under normal display condition to make first printing opacity protection film 61 and second printing opacity protection film 62 be in soft state, be applied to the car at this display module assembly 100, when the car normally goes, can not carry out mutual collision friction and lead to the abrasion between first printing opacity protection film 61 and the second printing opacity protection film 62. And collision scratch does not occur between the first light-transmitting protective film 61, the second light-transmitting protective film 62 and the light-increasing film 40. In the state that the driving circuit layer 20 receives the touch pressing signal, as shown in fig. 1 and 3, the first peaks 611 of the first light-transmitting protective film 61 are disposed corresponding to the second valleys 622 of the second light-transmitting protective film 62, so that when the module 100 is pressed, a mutual support can be formed between the first peaks 611 and the second valleys 622 which are disposed oppositely, and a rigid state is achieved, so that the substrate 10, the brightness enhancement film 40, the first light-transmitting protective film 61, the second light-transmitting protective film 62 and the like can be supported, thereby preventing the substrate 10 from being greatly deformed, and further preventing the pressing mura from being generated.

The second direction may be understood as a stacking direction of the functional layers of the display module 100, and the first direction is a direction perpendicular to the second direction. For example, the first direction is a horizontal direction and the second direction is a vertical direction. In the present embodiment, the materials of the first light-transmitting protective film 61 and the second light-transmitting protective film 62 are both transparent PET (polyester, polyethylene Terephthalate), and the materials of the first expansion plate 33 and the second expansion plate 34 are both piezoelectric ceramics. In other embodiments, the first light-transmitting protective film 61 and the second light-transmitting protective film 62 may be made of other polymer materials, which is not limited in this application.

In an embodiment, the connection frame 35, the first expansion plate 33, the second expansion plate 34, the first diffusion sheet 31 and the second diffusion sheet 32 enclose to form a diffusion system 30 with an enclosed space 36, the enclosed space 36 is filled with a transparent liquid 63, and the transparent liquid 63, the first transparent protective film 61 and the second transparent protective film 62 are all disposed in the enclosed space 36; wherein the refractive index of the transparent liquid 63 is the same as or similar to that of the transparent PET. In the present embodiment, the material of the transparent liquid 63 is chloroform. By setting the refractive index of the material used for the transparent liquid 63 to be the same as or similar to that of the transparent PET, the U-shaped wavy first light-transmitting protective film 61 and second light-transmitting protective film 62 can not generate optical shadows, so that the problem that mura is easy to occur when the display module 100 is deformed by touch and press in black pictures is avoided.

In an embodiment, the display module 100 further includes a plurality of light emitting units 90, a reflective layer 80 and a back plate 70, where the plurality of light emitting units 90 are disposed at intervals on a side of the diffusion plate 50 away from the second diffusion plate 32; a light emitting surface (not shown) is formed on a side of the plurality of light emitting units 30 away from the bottom plate 71, the reflective layer 80 is disposed on a side of the plurality of light emitting units 90 away from the diffusion plate 50, and the plurality of light emitting units 90 may be disposed on a surface of the reflective layer 80 close to the diffusion plate 50. In a further embodiment, a supporting frame 91 may be further provided on a side of the diffusion plate 50 away from the second diffusion plate 32 to support the diffusion plate 50 such that a certain distance is maintained between the diffusion plate 50 and the reflective layer 80. The supporting frame 91 may be specifically disposed between the light emitting units 90 disposed at intervals, and in the second direction, one end of the supporting frame 91 abuts against the surface of the diffusion plate 50 away from the second diffusion plate 32, and the other end is disposed on the surface of the reflective layer 80 close to the diffusion plate 50, that is, the supporting frame 91 and the light emitting units 90 are disposed on the same layer. It will be appreciated that the width of the supporting frame 91 needs to be as narrow as possible on the basis of ensuring the supporting effect, so as to avoid the influence of the supporting frame 91 on the reflecting effect of the reflecting layer 80.

In one embodiment, as shown in fig. 1, the back plate 70 includes a bottom plate 71 and a side plate 72, and the bottom plate 71 is disposed on a side of the reflective layer 80 away from the light emitting unit 90; the side plates 72 extend from the bottom plate 71 to the connection frame 35 and cover the connection frame 35. The back plate 70 may be configured as a plate structure having a groove structure (not shown), the reflective layer 80, the light emitting unit 90, and the support frame 91, the diffusion plate 50, and the closed diffusion system 30 are sequentially disposed on the bottom plate 71 along the second direction, the light enhancement film 40 is disposed on a side of the diffusion system 30 away from the diffusion plate 50, the adhesive layers 101 are disposed on opposite sides of the light enhancement film 40, and the adhesive layers 101 are disposed in the same layer as and spaced apart from the light enhancement film 40.

In an embodiment, as shown in fig. 1 and 2, the display module 100 further has a first polarizer 102 and a second polarizer 103, where the first polarizer 102 and the second polarizer 103 are an optical film that only allows light having a single polarization direction to pass through, and can achieve a polarizing effect. The first polarizer 102 and the second polarizer 103 are respectively disposed on two opposite sides of the substrate 10 in the second direction, wherein the first polarizer 102 is specifically disposed on one side of the color film substrate 11 away from the array substrate 12, and the second polarizer 103 is specifically disposed between the array substrate 12 and the brightness enhancement film 40. The substrate 10 and the back plate 70 are connected by bonding the bonding layer 101, which is provided in the same layer as the light enhancement film 40 and spaced apart from the surface of the second polarizer 103 near the light enhancement film 40.

It can be understood that the first polarizer 102, the second polarizer 103, the brightness enhancement film 40 and the substrate 10 are not disposed in the groove structure, but cover the groove structure, and the connection between the substrate 10 and the side plate 72 of the back plate 70 is realized by connecting the two ends of the brightness enhancement film 40 with the second polarizer 103 through the adhesive layer 101. The adhesive layer 101 may be specifically made of a foam adhesive or the like having a certain thickness.

In order to solve the above technical problem, the present application further provides a display device 200.

Referring to fig. 5, fig. 5 is a schematic diagram of a display device provided in the present application.

In an embodiment, the display device 200 includes a touch module 201 and a display module 100, and the display module 100 is electrically connected to the touch module 201; the touch module 201 faces the light emitting surface; the display module 100 is any one of the display modules 100 described above, and will not be described herein.

The display module comprises a substrate, a driving circuit layer, a first diffusion sheet, a second diffusion sheet and a diffusion plate, wherein the driving circuit layer is arranged on one side of the substrate; the first diffusion sheet is arranged on one side of the driving circuit layer, which is far away from the substrate; the second diffusion sheet is arranged on one side of the first diffusion sheet far away from the driving circuit layer; the diffusion plate is arranged on one side of the second diffusion sheet far away from the first diffusion sheet; the first light-transmitting protective film and the second light-transmitting protective film are arranged between the first diffusion sheet and the second diffusion sheet in a relative mode; the first light-transmitting protective film and the second light-transmitting protective film are both in the shape of waves, and the waves comprise wave crests and wave troughs which are sequentially arranged at intervals. In the normal display state, the wave crest of the first light-transmitting protective film and the wave crest of the second light-transmitting protective film are correspondingly arranged; in a state of receiving the touch pressing signal, the wave crest of the first light-transmitting protective film and the wave trough of the second light-transmitting protective film are correspondingly arranged, so that the substrate can resist deformation caused by pressing, and the problem of scratch moire (Trace mura) caused by pressing a screen is prevented. Meanwhile, the display module provided by the application can avoid scratches of the brightness enhancement film and the liquid crystal display; avoid the optical image quality defects such as dark shadow; no abnormal sound is generated during the running of the vehicle or when the vehicle is pressed by external touch.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (10)

1. A display module, comprising:

a substrate;

the driving circuit layer is arranged on one side of the substrate;

the first diffusion sheet is arranged on one side of the driving circuit layer away from the substrate;

the second diffusion sheet is arranged on one side of the first diffusion sheet far away from the driving circuit layer;

a first light-transmitting protective film and a second light-transmitting protective film which are oppositely arranged are arranged between the first diffusion sheet and the second diffusion sheet; the first light-transmitting protective film and the second light-transmitting protective film are both in a wave shape, and the wave shape comprises wave crests and wave troughs which are sequentially arranged at intervals; in a normal display state, the wave crest of the first light-transmitting protective film and the wave crest of the second light-transmitting protective film are correspondingly arranged; and in a state of receiving a touch pressing signal, the wave crest of the first light-transmitting protective film is arranged corresponding to the wave trough of the second light-transmitting protective film.

2. The display module according to claim 1, wherein the first light-transmitting protective film and the second light-transmitting protective film are each in a U-shaped wave shape, and the U-shaped wave shape has rounded crest and rounded trough sequentially arranged at intervals; in a normal display state, the wave crest of the U-shaped wave shape of the first light-transmitting protective film is arranged corresponding to the wave crest of the U-shaped wave shape of the second light-transmitting protective film; and in a state of receiving a touch pressing signal, the wave crest of the U-shaped wave shape of the first light-transmitting protective film is arranged corresponding to the wave trough of the U-shaped wave shape of the second light-transmitting protective film.

3. The display module of claim 1, wherein the display module further comprises:

the light enhancement film is arranged on one side, far away from the substrate, of the driving circuit layer, and the driving circuit layer is arranged between the substrate and the light enhancement film;

wherein, the brightness enhancement film is attached to the substrate.

4. The display module of claim 1, wherein the display module further comprises:

the first expansion plates are arranged at two ends of the first diffusion sheet along a first direction;

the second expansion plates are arranged at two ends of the second diffusion sheet along the first direction;

the connecting frames are arranged at two ends of the first diffusion sheet and the second diffusion sheet along the second direction;

wherein the connecting frame connects the first expansion plate and the second expansion plate in the second direction; the first and second expansion plates are configured to be elongated or shortened in a state of receiving a touch press signal; the first direction is perpendicular to the second direction.

5. The display module of claim 4, wherein the first light-transmissive protective film and the second light-transmissive protective film are both made of transparent polyester.

6. The display module of claim 5, wherein the connection frame, the first expansion plate, the second expansion plate, the first diffusion sheet and the second diffusion sheet enclose a diffusion system having a closed space, the closed space is filled with a transparent liquid, and the transparent liquid, the first light-transmitting protective film and the second light-transmitting protective film are all disposed in the closed space; wherein the refractive index of the transparent liquid is the same as or similar to that of the transparent polyester.

7. The display module of claim 6, wherein the transparent liquid material is chloroform; the first expansion plate and the second expansion plate are made of piezoelectric ceramics.

8. The display module of claim 4, wherein the display module further comprises:

the light-emitting units are arranged at intervals on one side, far away from the first diffusion sheet, of the second diffusion sheet;

the reflecting layer is arranged on one side of the plurality of light emitting units, which is far away from the second diffusion sheet;

the backboard comprises a bottom board and side boards, and the bottom board is arranged on one side of the reflecting layer far away from the light-emitting unit; the side plates extend from the bottom plate to the connecting frame and cover the connecting frame; wherein, a light emitting surface is formed on one side of the light emitting units far away from the bottom plate.

9. The display module of claim 8, wherein the display module further comprises:

the first polaroid is arranged on one side of the substrate far away from the driving circuit layer;

the second polaroid is arranged between the driving circuit layer and the brightness enhancement film and is opposite to the first polaroid.

10. A display device, comprising:

a touch control module; and

the display module is electrically connected with the touch module; the display module is a display module according to any one of the preceding claims 1 to 9.