CN217543580U - Display module and electronic equipment - Google Patents

Abstract

The utility model provides a display module assembly and electronic equipment relates to and shows technical field for it is bad to improve the rainbow line. This display module assembly includes: comprises a reflective display panel, a front light module and a cover plate; the front light module is arranged on the display side of the reflective display panel, and the cover plate is attached to one side, far away from the reflective display panel, of the front light module through a frame glue frame; the side, facing the front light module, of the cover plate is provided with a first micro-structure layer, the first micro-structure layer comprises a first portion located in the frame glue surrounding area, and the first portion comprises a plurality of first microstructures.

Description

Display module and electronic equipment

Technical Field

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

Background

The reflective display module with front light generally includes a reflective display panel, a front light module and a cover plate; the front light module is arranged on the display side of the reflective display panel, the cover plate is attached to one side, away from the reflective display panel, of the front light module through the frame glue, the frame glue supports a frame pasting gap between the cover plate and the front light module, and the frame pasting gap is filled with air to form an air film.

The cover plate is easily deformed under the action of external force (such as finger touch pressing, capacitance pen writing, accidental extrusion and the like), the thickness of an air film between the deformed cover plate and the front light module is reduced or even is zero (the cover plate is in direct contact with the front light module), and therefore colorful Newton rings can be generated at the deformed position, namely rainbow lines are poor.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this disclosure is to provide a display module assembly and electronic equipment for it is bad to improve the rainbow line that apron deformation leads to.

In order to achieve the above purpose, the embodiments of the present disclosure provide the following technical solutions:

on one hand, the display module comprises a reflective display panel, a front light module and a cover plate; the front light module is arranged on the display side of the reflective display panel, and the cover plate is attached to one side, away from the reflective display panel, of the front light module through a frame glue frame;

one side of the cover plate, which faces the front light module, is provided with a first micro-structural layer, the first micro-structural layer comprises a first part which is located in the frame glue surrounding area, and the first part comprises a plurality of first microstructures.

In the display module, the first microstructure in the first microstructure layer enables the first microstructure layer to be provided with a microstructure layer surface which is uneven relative to the cover plate on one side close to the front light module. When the surface of the uneven microstructure layer is contacted with the front light module along with the deformation of the cover plate, the thickness of the air film around the contact position is in a state of different sizes, so that on one hand, the optical path difference at the same distance from the contact position is different, and the condition of equal-thickness interference is damaged; on the other hand, at the same distance from the contact position, the rugged microstructure layer surface may have a position air film thickness larger than the wave train length and a position air film thickness not larger than the wave train length, thereby hindering the generation of the rainbow unevenness in a partial area.

At the position where the color Newton ring occurs, the uneven surface of the microstructure layer can also enable the interference ring in the color Newton ring to possibly protrude outwards at some positions and protrude inwards at some positions; thereby disturbing the extending direction of the interference rings in the color Newton's ring. The outward protruding part and the inward protruding part of the interference ring can be superposed with interference rings of other orders, and because the interference rings of different orders have different colors, when the interference rings of different orders are superposed, the superposed color is changed into or tends to be white; thereby improving or even eliminating the color newton's rings.

In addition, the structural feature of the surface height fluctuation of the microstructure layer enables the cover plate and the front light module not to be completely close to each other when in contact, so that vacuum adsorption is avoided, and the problem that the color Newton's rings (rainbow lines) cannot be eliminated after external force is removed is avoided. Moreover, the first microstructure layer can improve and even eliminate the color Newton's rings, so that the design of the display module is favorable for being light and thin.

In some embodiments, at least one first microstructure of the plurality of first microstructures has a different dimensional shape and/or size than another first microstructure.

In some embodiments, at least one first microstructure of the plurality of first microstructures is not equal to another first microstructure with respect to a maximum height, a minimum height, and/or a height difference of the first microstructures relative to the cover plate.

In some embodiments, the maximum dimension of at least one first microstructure is on the order of hundreds of nanometers or less, the maximum dimension being the maximum of the linear distance between any two points in the first microstructure.

In some embodiments, the first microstructure is a protruding structure protruding toward the front light module, or a recessed structure recessed in a direction away from the front light module;

the first microstructure is spherical, hemispherical, pyramid-shaped or conical.

In some embodiments, the plurality of first microstructures is continuously or near-continuously distributed.

In some embodiments, the front light module includes a light guide plate, one side of the light guide plate is attached to the reflective display panel, and the other side of the light guide plate is connected to the cover plate through the sealant;

in the surrounding area of the frame glue, the light guide plate is provided with a plurality of dimming structures;

the distribution density of the plurality of first microstructures is larger than that of the plurality of light adjusting structures.

In some embodiments, the first microstructured layer is an atomized layer having a haze of less than or equal to 10%.

In some embodiments, the display module further includes a second microstructure layer disposed on a side of the first microstructure layer away from the front light module, and the second microstructure layer is an atomized layer having a haze greater than that of the first microstructure layer.

In some embodiments, the second microstructured layer has a haze of 20% or greater.

In some embodiments, the first microstructure layer is an anti-glare film attached to the cover plate, and the anti-glare film comprises a substrate and a plurality of atomized particles disposed on the substrate; the base material is attached to the cover plate, and the plurality of atomized particles form the plurality of first microstructures.

In some embodiments, the first microstructure layer is an atomized layer fabricated on the cover plate.

In some embodiments, the display module further includes an anti-reflection layer disposed on a side of the first microstructure layer away from the cover plate.

In some embodiments, the cover plate is a touch panel or/and cover glass.

In another aspect, an electronic device is provided. The electronic device includes: the display module according to any of the above embodiments.

The display device has the same structure and beneficial technical effects as the display module provided in some embodiments, and the description is omitted here.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings required to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to these drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

FIG. 1 is a block diagram of a display module according to some embodiments;

FIG. 2 is a block diagram of a reflective display panel according to some embodiments;

FIG. 3 is a view of the cover plate and the light guide plate shown in FIG. 1;

FIG. 4 is a structural diagram of the light guide plate and the deformable cover plate in FIG. 3;

FIG. 5 is a block diagram of another display module according to some embodiments;

FIG. 6 is a schematic structural view of the first microstructure layer of FIG. 5;

FIG. 7 is a structural diagram of the light guide plate and the deformable cover plate in FIG. 5;

FIG. 8 is a graph of the effect of a protruding structure on an interference ring according to some embodiments;

FIG. 9 is a graph illustrating the effect of a recessed feature on an interference ring according to some embodiments;

FIG. 10 is a block diagram of a protrusion-type microstructure and a recess-type microstructure according to some embodiments;

fig. 11 is a block diagram of a first microstructure layer according to some embodiments;

fig. 12 is a block diagram of another first microstructured layer in accordance with some embodiments;

fig. 13 is a block diagram of yet another first microstructured layer in accordance with some embodiments;

FIG. 14 is a block diagram of yet another first microstructure layer according to some embodiments;

FIG. 15 is a graph of haze vs. display module contrast for a first microstructured layer, in accordance with some embodiments;

FIG. 16 is a block diagram of an AG film, according to some embodiments;

FIG. 17 is a block diagram of an atomized layer according to some embodiments;

FIG. 18 is a block diagram of another display module according to some embodiments;

FIG. 19 is a block diagram of yet another display module according to some embodiments;

FIG. 20 is a block diagram of another display module according to some embodiments.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

Throughout the specification and claims, the term "comprising" is to be interpreted in an open, inclusive sense, i.e., as "including, but not limited to," unless the context requires otherwise. In the description herein, the terms "one embodiment," "some embodiments," "an example embodiment," "an example" or "some examples" or the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, the expressions "coupled" and "connected," along with their derivatives, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

"at least one of A, B and C" has the same meaning as "at least one of A, B or C" and includes the following combination of A, B and C: a alone, B alone, C alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

As used herein, the term "if" is optionally interpreted to mean "when … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if … … is determined" or "if [ stated condition or event ] is detected" is optionally interpreted to mean "at … … is determined" or "in response to … … is determined" or "when [ stated condition or event ] is detected" or "in response to [ stated condition or event ] being detected", depending on the context.

The use of "adapted to" or "configured to" herein is meant to be an open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps.

Additionally, the use of "based on" means open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or values beyond those stated.

As used herein, "about," "approximately" or "approximately" includes the stated value as well as average values within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with measuring the particular quantity (i.e., the limitations of the measurement system).

As used herein, "parallel," "perpendicular," and "equal" include the stated case and cases that approximate the stated case to within an acceptable range of deviation as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where an acceptable deviation from approximately parallel may be, for example, within 5 °; "perpendicular" includes absolute perpendicular and approximately perpendicular, where an acceptable deviation from approximately perpendicular may also be, for example, within 5 °. "equal" includes absolute and approximate equality, where the difference between the two, which may be equal within an acceptable deviation of approximately equal, is less than or equal to 5% of either.

It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

An embodiment of the present disclosure provides a display module, and fig. 1 is a structural diagram of a display module according to some embodiments, and as shown in fig. 1, the display module in the embodiment of the present disclosure includes a reflective display panel 1, a front light module 6, and a cover plate 4. The reflective display panel 1 reflects external light, such as ambient light, incident inside the display panel to realize display.

The reflective display panel 1 has a plate-shaped structure, and includes a display side 11 and a display back side 12 opposite to each other, a direction between the display back side 12 and the display side 11 is a display direction of the reflective display panel 1, and a user views display contents of the reflective display panel 1 in front of the display side 11. Taking the orientation shown in fig. 1 as an example, the upper side of the reflective display panel 1 in fig. 1 is a display side 11, and the lower side of the reflective display panel 1 is a display back side 12.

As an implementation of the reflective display panel 1, the reflective display panel 1 may be a reflective liquid crystal display panel, and fig. 2 is a structural diagram of the reflective liquid crystal display panel according to some embodiments, as shown in fig. 2, the reflective liquid crystal display panel includes an Array (Array) substrate 14, a pair of cell substrates 13, and a liquid crystal layer 15, the Array substrate 14 and the pair of cell substrates 13 are arranged in a pair of cells, and the liquid crystal layer 15 is arranged between the pair of cell substrates 14 and 13.

The array substrate 14 includes a reflective layer, a substrate, and a pixel electrode disposed on the substrate, and a common electrode corresponding to the pixel electrode is disposed on the opposite-to-case substrate 13 or the array substrate 14. When a driving voltage is applied between the pixel electrode and the common electrode, an electric field is generated between the pixel electrode and the common electrode, the liquid crystal layer 15 positioned between the pixel electrode and the common electrode is turned over under the action of the electric field, and the light transmission quantity can be changed by turning over the liquid crystal layer 15, so that the display control of the reflective liquid crystal display panel can be realized in a mode of applying the driving voltage between the pixel electrode and the common electrode.

The reflective layer is disposed on the substrate, may be disposed on a side of the substrate away from the pixel electrode, may be disposed on a side of the pixel electrode away from the substrate, or may be disposed between the substrate and the pixel electrode. For example, in the present embodiment, the reflective layer is disposed on a side of the pixel electrode away from the substrate.

In the display process of the reflective liquid crystal display panel, external light irradiates the reflective layer from the opposite box substrate 13 and the liquid crystal layer 15, the reflective layer reflects the external light to form reflected light, and the reflected light irradiates the outside of the reflective liquid crystal display panel through the liquid crystal layer 15 and the opposite box substrate 13, so that reflective display is realized. The turning of the liquid crystal between the pixel electrode and the common electrode can be controlled by controlling the driving voltage between the pixel electrode and the common electrode, and the adjustment of the transmission amount of the reflected light of the reflecting layer is realized by the turning of the liquid crystal layer 15.

The opposite-box substrate 13 may be a color filter (abbreviated as CF) substrate having a color film layer, where the color film layer in the color filter substrate includes a plurality of optical filters, the optical filters are made of color-resistant materials, and the color-resistant materials have a higher light transmittance in a specific wavelength range and a lower light transmittance in other wavelength ranges. That is, the color-resist material can allow light of a specific wavelength to pass therethrough and block light of other wavelengths, so that the passed light shows a predetermined color. For example, in some specific examples, the color film layer includes a red filter, a green filter and a blue filter for displaying three primary colors of red, green and blue, and then the color display is realized by mixing the three primary colors of red, green and blue.

In a possible embodiment, the box substrate 13 may not be provided with a color film layer, that is, the reflective liquid crystal display panel may be suitable for an application scenario where color display is not performed. The reflective liquid crystal display panel may be any type of Twisted Nematic (TN) liquid crystal display panel, in Plane Switching (IPS) liquid crystal display panel, advanced Super Dimension Switch (ADS) liquid crystal display panel, super Advanced Super Dimension Switch (HADS) liquid crystal display panel, or the like; the embodiments of the present disclosure do not limit the specific type of the reflective liquid crystal display panel.

The foregoing embodiment has been described with the liquid crystal display panel as an example of the reflective display panel 1, but the display module provided in the embodiments of the disclosure is not limited thereto, and as another embodiment of the reflective display panel 1, the reflective display panel 1 may also be other types of display panels capable of implementing reflective display, such as an electrophoretic display panel (EPD), an E-Ink display panel, and a CID (clear Ink) display panel. The disclosed embodiments do not limit the specific type of the reflective display panel 1.

In a possible embodiment, the reflective display panel 1 further comprises a Polarizer (Polarizer, POL for short) arranged at the display side 11 of the reflective display panel 1.

As can be known from the description of the operating principle of the reflective display panel 1, the reflective display panel 1 realizes the display function by reflecting the external light, so that the intensity of the external light directly affects the display effect of the reflective display panel 1, and thus has certain limitations in the using process. For example, in a dark light environment, the reflective display panel 1 has a poor display effect, and the display may be unclear; in a dark and dark environment, the reflective display panel 1 cannot display the image. In view of this, in some products, for example, in the embodiment shown in fig. 1, the display module is provided with a front light module 6 on the display side 11 of the reflective display panel 1, and the front light module 6 is used for providing a light source for the display of the reflective display panel 1, so as to ensure that the reflective display panel 1 can realize normal display in dark light and dark environment.

Fig. 3 is a view showing the cover Plate and the Light Guide Plate of fig. 1, please refer to fig. 1 and 3, in some embodiments, the front Light module 6 includes a front Light source (Light Bar, abbreviated as LB) 62 and a Light Guide Plate (Light Guide Plate, abbreviated as LGP) 61, wherein the Light Guide Plate 61 is a Plate-shaped structure disposed generally parallel to the reflective display panel 1, and includes a first side surface 611 and a second side surface 612 disposed opposite to each other along the display direction, and a peripheral end surface connecting the first side surface 611 and the second side surface 612; the first side 611 is close to the reflective display panel 1 with respect to the second side 612.

The reflective display panel 1 and the light guide plate 61 may be bonded together or frame-bonded together. Illustratively, in the embodiment shown in fig. 1, the light guide plate 61 is fully attached to the display side 11 of the reflective display panel 1 by a transparent optical Adhesive (OCA) 2. In the embodiment having the polarizer, the light guide plate 61 is entirely attached to the polarizer by the transparent optical adhesive 2. The front light source 62 is disposed outside the peripheral end surface of the light guide plate 61, and light generated by the front light source 62 is introduced from the peripheral end surface of the light guide plate 61, guided and reflected to the display side 11 of the reflective display panel 1 through the light guide plate 61, and enters the reflective display panel 1 from the display side 11 to provide light source for the reflective display panel 1. The reflective display panel 1 adopts the light source of the front light module 6 to perform reflective display, so that the reflective display panel can normally display in dark and dark environments, the use scene of the reflective display panel 1 is enlarged, and the display effect of the reflective display panel 1 can be obviously improved.

The display module provided in the embodiment of the present disclosure further includes a cover plate 4, where the cover plate 4 is disposed on a side of the light guide plate 61 away from the reflective display panel 1, that is, the second side 612 of the light guide plate 61. In some possible application scenarios, the Cover plate 4 includes a Touch Panel (TP) 41 and a Cover Glass (CG) 42, the Touch Panel 41 is used for implementing a Touch function of the display module, and the Cover Glass 42 is disposed on a side of the Touch Panel 41 away from the reflective display Panel 1, so as to protect the Touch Panel 41 and the reflective display Panel 1.

In some other possible application scenarios, for example: the display module is not provided with the touch panel 41, the touch panel 41 in the display module is in a plug-in form or the touch panel 41 is arranged at other positions of the display module, and the cover plate 4 in the display module is the cover plate glass 42 and does not include the touch panel 41.

In a possible embodiment, the cover glass 42 can also be replaced by other transparent plate-like structures, such as: quartz cover plates, plastic cover plates, etc., wherein the plastic cover plates may be made of PMMA (polymethyl methacrylate, also known as organic glass, acryl) or Polycarbonate (Polycarbonate, abbreviated as PC), etc.

Referring to fig. 1, in the display module provided in the embodiment of the present disclosure, the cover plate 4 is a general name of a touch panel 41 and a cover glass 42, the cover plate 4 includes the touch panel 41 and the cover glass 42, and the cover glass 42 is disposed on a side of the touch panel 41 away from the reflective display panel 1.

Referring to fig. 3, the light guide plate 61 in the front light module 6 is frame-attached to the cover plate 4 through the sealant 3 on a side away from the reflective display panel 1, i.e., the second side 612 of the light guide plate 61. The sealant 3 is generally a colloid structure extending along the closed contour, for example, the sealant 3 may be a square colloid. Under the support of the frame glue 3, a certain gap is kept between the light guide plate 61 and the cover plate 4 in the display direction of the display module, and the gap between the light guide plate 61 and the cover plate 4, which is supported by the frame glue 3, is a frame pasting gap 5.

It can be understood that the size of the frame pasting gap 5 is related to the thickness of the frame glue 3, the frame pasting gap 5 that the thicker frame glue 3 can support is larger, and the frame body gap that the thinner frame glue 3 can support is smaller.

The space surrounded by the sealant 3 between the light guide plate 61 and the cover plate 4 is defined as a sealant space, the sealant space is filled with air to form an air film with a thickness equal to that of the frame paste GAP 5, i.e., the air GAP.

Although the cover plate 4 generally has a certain rigidity requirement, under the influence of factors such as its material and structure, the cover plate 4 deforms toward the light guide plate 61 under the action of natural or external force, and when the deformation amplitude reaches a certain degree, for example, when the cover plate contacts the light guide plate 61, color newton rings, i.e., rainbow patterns, are generated at the contact position, and the center of the color newton rings is the contact position.

The newton ring is a phenomenon of thin film interference, which is a phenomenon that if a beam of light is irradiated onto a thin film, the light is reflected by an upper interface and a lower interface of the thin film due to different refractive indexes, and new light waves are formed due to mutual interference.

Newton's rings belong to the phenomenon of equal thickness interference in thin film interference, and interference patterns are concentric rings with alternate light and dark. For example, a convex surface of a convex lens with a large curvature radius is contacted with a plane glass, and when the interference pattern is irradiated by sunlight or white light, a contact point in the interference pattern can be seen as a dark point, and a plurality of color rings with alternate light and shade are arranged around the dark point; when the single-color light is used for illumination, the interference pattern is represented by a plurality of light and shade alternate single-color rings. The rings (colored rings or monochromatic rings) in the Newton rings are interference rings formed by mutual interference of light rays, the sequence of the interference rings relative to the circle center is the order of the interference rings, and for the colored rings, the colored rings with different orders in the interference pattern have different colors.

In a common application scenario of the display module in the embodiment of the present disclosure, the display module is generally used under sunlight and white light, so that the newton ring is a colored newton ring with color, and colored interference rings with different polarities in the interference pattern have different colors.

The principle of generating color Newton's rings by the display module in the embodiment shown in FIG. 1 is as follows:

referring to fig. 4, when the cover plate 4 in the display module is deformed to contact the light guide plate 61, the deformed cover plate 4 forms a convex structure similar to a convex lens, the convex structure extends toward the light guide plate 61, and the side surface of the cover plate 4 contacts the light guide plate 61. A circular wedge-shaped air film which is unevenly changed is formed between the cover plate 4 and the light guide plate 61 around the contact position of the cover plate 4 and the light guide plate 61; when external light is vertically emitted to the deformed position (i.e., the contact position) of the cover plate 4, two beams of light reflected from the upper and lower surfaces of the wedge-shaped air film are superimposed on each other to generate interference. The air film thickness is the same at the position of the circular ring with the same radius away from the contact position, and the reflected light path difference of the upper surface and the lower surface is the same, so that the interference pattern is in a circular ring shape.

Under sunlight or white light irradiation, the contact position of the cover plate 4 and the light guide plate 61 can be seen as a dark point, the interference pattern is represented as a plurality of color rings with alternate light and shade, which take the contact position as the center of a circle, namely, a color Newton ring can be generated at the contact position, and the center of the color Newton ring is the contact position; the rings of different polarity in the interference pattern have different colors.

An important condition for generating the color Newton rings is that the thickness of the air film is less than the length of the wave train, and when the thickness of the air film is greater than the length of the wave train, the color Newton rings can be avoided because the interference can not occur. As will be appreciated by those skilled in the art, the wavetrain length of a typical light source is typically on the order of a few microns.

Based on this, in order to avoid the display module from generating the color newton's rings in a natural state, in a possible embodiment, the thickness of the air film between the cover plate 4 and the light guide plate 61 may be controlled to be always larger than the length of the wave train, that is, the frame adhesive gap 5 between the cover plate 4 and the light guide plate 61 needs to be controlled to be always larger than the length of the wave train by the frame adhesive 3. And the cover plate 4 also has a certain warping degree, so the frame attaching gap 5 can be arranged according to the warping degree and the wave train length of the cover plate 4. For example, in some products, the warpage of the cover plate 4 is generally controlled within 0.5mm, and therefore, the frame adhesive gap 5 with a thickness of more than 0.5mm is generally required to be reserved through the frame adhesive 3.

However, in the using process of the display module, the cover plate 4 may still be subjected to an external force, such as finger touch pressing, capacitive pen writing, accidental squeezing, etc., the cover plate 4 is easily deformed toward the light guide plate 61 under the external force, and the thickness of the air film between the deformed cover plate 4 and the light guide plate 61 is reduced or even zero (smaller than the wave train length), so that even if the thicker sealant 3 is used, the occurrence of the color newton rings at the deformed position may not be hindered.

In some embodiments, the frame paste gap 5 is continuously increased to ensure that the frame paste gap 5 (air film thickness) between the cover plate 4 and the light guide plate 61 is greater than the wave train length when the cover plate 4 is in the maximum deformation state, which can also be known from the above principle about the generation of color newton rings, so as to avoid the generation of color newton rings. However, the thickness of the display module is increased by increasing the frame paste gap 5, and the display effect of the display module is affected, which is not favorable for the light and thin design of the display module.

In view of this, the present disclosure provides a display module, please refer to fig. 5 and fig. 6, the display module is provided with a first microstructure layer 7, the first microstructure layer 7 is disposed on one side of the cover plate 4 facing the light guide plate 61, and at least a plurality of first microstructures 71 are disposed in the sealant space surrounded by the sealant 3. The first microstructures 71 in the first microstructure layer 7 make the side surface of the first microstructure layer 7 close to the light guide plate 61 exhibit a variation trend of unevenness relative to the cover plate 4.

Herein, the side of the first microstructure layer 7 close to the light guide plate 61 is defined as a microstructure layer surface 72, and the first microstructures 71 in the first microstructure layer 7 make the microstructure layer surface 72 exhibit a variation trend of unevenness. It should be noted that, with respect to the height of the microstructure layer surface 72 relative to the cover plate 4, the distance of a certain point in the microstructure layer surface 72 relative to the cover plate 4 is the height of the point.

Fig. 7 is a structural diagram of the light guide plate and the deformable cover plate in fig. 5, and as shown in fig. 7, when the cover plate 4 is deformed toward the light guide plate 61 by a force, the first microstructure layer 7 at the deformed position is close to the light guide plate 61, and may even contact with the light guide plate 61.

When the minimum air film thickness between the microstructure layer surface 72 of the first microstructure layer 7 and the light guide plate 61 is greater than the wave train length, the occurrence of interference can be avoided, thereby avoiding the generation of color newton's rings.

When the microstructure layer surface 72 of the first microstructure layer 7 contacts the light guide plate 61 at the deformed position, or the minimum air film thickness between the microstructure layer surface 72 and the light guide plate 61 is less than the wave train length, film interference may occur at the deformed position.

Taking the microstructure layer surface 72 shown in fig. 7 contacting the light guide plate 61 at the deformation position as an example, after the microstructure layer surface 72 contacts the light guide plate 61, the thickness of the air film (air GAP) around the contact position is the distance between the light guide plate 61 and the microstructure layer surface 72, and the uneven microstructure layer surface 72 causes the thickness of the air film around the contact position to also exhibit a variation trend with different magnitudes.

The thickness of the air film around the contact position shows the variation trend of different sizes, so that the thickness of the film at the same distance from the contact position is inconsistent, the optical path difference is changed, and the condition of equal-thickness interference is damaged. On the other hand, at the same distance from the contact location, the rugged microstructure layer surface 72 may have a location air film thickness greater than the wave train length and a location air film thickness not greater than the wave train length; the color Newton rings can be avoided from being generated at the place where the thickness of the air film is larger than the length of the wave train; where the air film thickness is no greater than the wave train length, interference may occur, possibly resulting in colored newton's rings (i.e., rainbow fringes); that is, the first microstructure layer 7 is designed to prevent the generation of rainbow patterns in a partial area.

On the other hand, in the case of interference to generate a color newton ring, the design of the first microstructure layer 7 may also disturb the extending direction of the interference rings in the color newton ring.

Fig. 8 is a diagram illustrating the influence of a protruding structure on an interference ring according to some embodiments, a lower diagram in fig. 8 is an example of the protruding structure, and an upper diagram in fig. 8 is an interference ring generated by the protruding structure in the example of the lower diagram.

Fig. 9 is a diagram illustrating an influence of a concave structure on an interference ring according to some embodiments, where a lower diagram in fig. 9 is an example of the concave structure, and an upper diagram in fig. 9 is an interference ring generated by the concave structure of the example of the lower diagram, it can be seen from fig. 9 that, due to the influence of the concave structure, the interference ring protrudes inward at a position of the concave structure, where the inward is a direction close to a center of the color newton ring.

The microstructure layer surface 72 shows a tendency of variation in height, i.e. the first microstructure layer 7 comprises a convex structure and a concave structure on the side facing the light guide plate 61. Based on the principle shown in fig. 8 and 9, the surface 72 of the micro-structure layer is designed to be uneven and extended, so that the interference rings in the color newton ring may protrude outward at some positions and protrude inward at some positions; thereby disturbing the extending direction of the interference rings in the color Newton's ring. The outward protruding part and the inward protruding part of the interference ring can be overlapped with other extremely interference rings, and the interference rings of different orders have different colors, so when the interference rings of different orders are overlapped, namely different colors are overlapped, the color mixing can be realized by the overlapping of different colors, and the mixed color becomes or tends to be white, so that the color Newton's ring is improved or even eliminated.

As can be seen from the above principle of improving the color newton's rings for the first microstructure layer 7, in the display module provided in the embodiment of the present disclosure, the plurality of first microstructures 71 are disposed to form the relief microstructure layer surface 72, so that when the relief microstructure layer surface 72 generates the color newton's rings, some positions may interfere with each other, and some positions may not interfere with each other; thereby hindering the generation of colored newton's rings in some areas.

In addition, at the position where the color Newton's rings are generated, the interference rings protrude inwards at certain positions and protrude outwards at certain positions; therefore, the extending direction of the interference rings in the color Newton ring generating area is disturbed, and the interference rings which protrude outwards and protrude outwards can be superposed with other interference rings for the utmost time to realize color mixing, so that the color Newton rings are displayed as white or tend to be white; thereby improving or even eliminating the color newton's rings.

Therefore, in the display module provided by the embodiment of the present disclosure, by using the first microstructure layer 7 having the plurality of first microstructures 71, an effect of improving or even eliminating the color newton's rings can be achieved.

In addition, the structural feature of the undulation of the surface 72 of the microstructure layer makes the light guide plate 61 and the cover plate 4 not close to each other completely when contacting each other, so as to avoid vacuum adsorption, and avoid the problem that the light guide plate 61 and the cover plate 4 cannot be separated after the external force is removed after being pressed, and the color newton's rings (rainbow patterns) cannot be eliminated.

Moreover, since the first microstructure layer 7 can improve or even eliminate the color newton's rings, in some scenes, the frame paste gap 5 can be properly reduced, which is beneficial to the design of the display module with light weight and thinness.

As can be seen from the above description of the principle of the effect of the microstructure layer surface 72 on the color newton ring, the uneven microstructure layer surface 72 in the first microstructure layer 7 affects the improvement effect of the color newton ring, and the type, shape and size of the first microstructure 71 in the first microstructure layer 7 are related to the variation trend of the height of the microstructure layer surface 72, that is, affect the improvement effect of the color newton ring.

As shown in fig. 10, the first microstructures 71 in the first microstructure layer 7 can be generally classified into a protruding microstructure 711 and an inward-recessed microstructure 712, where the protruding microstructure 711 is a microstructure protruding toward the light guide plate 61, and the inward-recessed microstructure 712 is a microstructure recessed along a direction away from the light guide plate 61, that is, a groove structure.

The first microstructures 71 in the first microstructure layer 7 may be all protrusion microstructures 711 or all recess microstructures 712, or a portion of the first microstructures may be protrusion microstructures 711 or a portion of recess microstructures 712. That is, the convex microstructure 711 and the concave microstructure 712 are mixed in the first microstructure layer 7.

Compared with the single use of the protruding microstructures 711 and the recessed microstructures 712, the hybrid design of the protruding microstructures 711 and the recessed microstructures 712 can increase the amplitude of variation of the microstructure layer surface 72 in the first microstructure layer 7, and as can be known from the above principle of generation and improvement of color newton rings, the larger amplitude of variation of the microstructure layer surface 72 can make the thickness of air films at more positions greater than the length of a wave train when the microstructure layer surface 72 contacts the light guide plate 61, so that the occurrence of light interference is blocked in more regions, and the improvement and even elimination of color newton rings are facilitated.

The first microstructure 71 in the first microstructure layer 7 may be a three-dimensional structure with any three-dimensional shape, for example, a three-dimensional structure with a regular three-dimensional shape, or a three-dimensional structure with an irregular three-dimensional shape; the regular solid shape may be a sphere, a hemisphere, a pyramid, a cone, or the like. For the protruding microstructures 711, the three-dimensional shape of the first microstructures 71 is the shape of the structure protruding toward the light guide plate 61; for the concave-type microstructures 712, the three-dimensional shape of the first microstructures 71 is a concave groove shape that is concave in a direction away from the light guide plate 61.

The different types and shapes of the first microstructures 71 in the first microstructure layer 7 make the surface 72 of the microstructure layer have different high-low variation trends, and the size of the first microstructures 71 is also a factor affecting the high-low variation trend of the surface 72 of the microstructure layer, especially the factor affecting the high-low variation amplitude. However, since the first microstructures 71 may be a three-dimensional structure of any shape, the use of a uniform standard to measure the size of the first microstructures 71 generally has limitations; therefore, the appropriate size can be selected as a size parameter according to different three-dimensional shapes and different types of the first microstructures 71.

For example, in some embodiments, the first microstructures 71 may use volume as a measure, and when one first microstructure 71 has a larger volume than another first microstructure 71, the first microstructure 71 with the larger volume is larger than the first microstructure 71 with the smaller volume.

For another example, in other embodiments, the height of the first microstructure 71 relative to the cover plate 4 may be used as a measurement parameter. The first microstructures 71 have a maximum height and a minimum height with respect to the cover plate 4, the difference between the maximum height and the minimum height being the height difference of the first microstructures 71 with respect to the cover plate 4.

Taking the embodiment shown in fig. 10 as an example, the maximum height of the first microstructure 71 relative to the cover plate 4 is shown as H1, and the minimum height of the first microstructure 71 relative to the cover plate 4 is shown as H2; the height difference Δ H of the first microstructure 71 relative to the cover plate 4 is H1-H2.

For the first microstructure 71, at least one of the minimum height H2, the maximum height H1 and the height difference Δ H may be used as a parameter for dimensioning. For example, between the two first microstructures 21, when the minimum height H2 is equal, it is considered that the larger of the maximum height H1 and the height difference Δ is larger; when the maximum height H1 is equal, the minimum height H2 and the height difference Δ are considered to be larger; when the maximum height H1 and the minimum height H2 are not equal to each other, it is considered that the larger the height difference Δ is, the larger the height difference Δ is.

For another example, in other embodiments, the first microstructure 71 may further adopt a maximum size as a parameter for measuring the size, wherein the maximum size is a maximum value of a linear distance between any two points in the first microstructure 71; the height difference Δ H above may also be an example of the maximum size.

The volume, the minimum height H2, the maximum height H1, the height difference Δ H, and the maximum size for measuring the size of the first microstructures 71 are merely exemplary, and the disclosed embodiments are not limited thereto.

Although the larger size of the first microstructure 71 can increase the variation range of the height of the surface 72 of the microstructure layer, thereby being beneficial to improving the improvement effect of the color newton's rings, the larger size of the first microstructure 71 will affect the display effect of the display module. Therefore, the size (e.g., height difference and/or maximum dimension) of the first microstructures 71 is typically on the order of hundreds of nanometers and below based on a compromise between display effect and color newton's rings. That is, the first microstructures 71 are generally sized much smaller than the wave train length based on the combined consideration between ensuring the display effect and improving the color newton's ring.

In some embodiments, the first microstructures 71 in the first microstructure layer 7 are of the same type, size and shape, and the first height, second height and height difference with respect to the cover plate 4 are the same between the first microstructures 71 of the same size and shape.

Illustratively, fig. 11 is a structural diagram of a first microstructure layer according to some embodiments, in the embodiment shown in fig. 11, the first microstructure layer 7 includes a plurality of first microstructures 71 having the same size, the first microstructures 71 are protrusion-type microstructures and are each in the shape of a cone, and the first height, the second height and the height difference of the first microstructures 71 relative to the cover plate 4 are equal.

By such design, the first microstructure 71 of the first microstructure layer 7 enables the first microstructure 71 to have a highly undulating microstructure layer surface 72, and the microstructure layer surface 72 can improve or even eliminate color newton's rings generated by deformation of the cover plate 4; the microstructure layer surface 72 can prevent the light guide plate 61 and the cover plate 4 from being completely closed when contacting with each other, thereby avoiding the problem that the light guide plate 61 and the cover plate 4 cannot be separated after the external force is removed after the external force is pressed, and the color newton's rings (rainbow patterns) cannot be eliminated.

In a further possible embodiment, the first microstructure layer 7 has at least one of a different type, size and shape of the first microstructure 7, and the trend of the elevation of the microstructure layer surface 72 of the first microstructure layer 7 is made to exhibit irregular characteristics by using different types, different shapes and/or different sizes of the first microstructures 71 in the first microstructure layer 7. As can be seen from the above-mentioned improvement principle of the microstructure layer surface 72 on the color Newton's rings, the irregular variation characteristic of the microstructure layer surface causes the direction change of the color Newton's rings to also exhibit irregular variation, thereby advantageously improving the improvement effect on the color Newton's rings. And the microstructure layer surface 72 makes the light guide plate 61 and the cover plate 4 not close to each other completely when contacting, thereby avoiding the problems that the light guide plate 61 and the cover plate 4 cannot be separated after the external force is removed after being pressed by the external force, and the color Newton's rings (rainbow lines) cannot be eliminated.

For example, fig. 12 is a structural diagram of another first microstructure layer 7 according to some embodiments, and in the embodiment shown in fig. 12, the first microstructures 71 of the first microstructure layer 7 are all protrusion-type microstructures 711 and are all cones in shape; however, the first microstructures 71 in the first microstructure layer 7 have different heights with respect to the cover plate 4, that is, the first microstructures 71 in the first microstructure layer 7 have different sizes. By such design, the first microstructures 71 of the first microstructure layer 7 make the surface 72 of the microstructure layer exhibit different variation trends, and the variation of the surface 72 of the microstructure layer exhibits irregular variation trends.

In another example, fig. 13 is a structural diagram of another first microstructure layer 7 according to some embodiments, and in the embodiment shown in fig. 13, the first microstructures 71 of the first microstructure layer 7 are all protrusion-type microstructures 711, but have different shapes and sizes, a part of the first microstructures 71 are conical, and a part of the first microstructures 71 are hemispherical. By such design, the first microstructures 71 of the first microstructure layer 7 make the surface 72 of the microstructure layer exhibit different variation trends, and the variation of the surface 72 of the microstructure layer exhibits more irregular variation trends.

In yet another example, fig. 14 is a structural diagram of another first microstructure layer 7 according to some embodiments, and in the implementation shown in fig. 14, a part of the first microstructures 71 of the first microstructure layer 7 are protrusion-type microstructures 711 and a part of the first microstructures 71 are recess-type microstructures 712, but are conical in shape and have the same size. By such design, the first microstructure 71 of the first microstructure layer 7 makes the microstructure layer surface 72 exhibit different variation trends, and the microstructure layer surface 72 has a larger variation range of height.

The first microstructure layer 7 may realize different trend changes by changing at least one of the type, type ratio, size and shape of the first microstructure 71, and details are not repeated here.

In some embodiments, the first microstructures 71 are continuously arranged or nearly continuously arranged at least in a first portion, wherein the first portion is a portion of the first microstructure layer 7 located in the sealant space, that is, a portion surrounded by the sealant 3. The continuous arrangement here means that adjacent first microstructures 71, whether convex microstructures or concave microstructures, are connected; thereby forming a continuous level change on the microstructure layer surface 72 of the first microstructure layer 7. By the design, the improvement range of the first microstructure layer 7 on the color Newton rings can be ensured, and no matter how the deformation position of the cover plate 4 is on the cover plate 4, a better improvement effect on the color Newton rings can be realized.

Here, the nearly continuous arrangement means a discontinuous state in which the adjacent first microstructures 71 in a partial region are allowed to be disconnected, but the area ratio of the discontinuous arrangement portion in the entire first portion should not exceed 10%.

In addition, the deformation position of the cover plate 4 after being stressed is usually at the central position of the cover plate 4 far away from the frame glue 3, and the cover plate 4 close to the frame glue 3 is supported by the frame glue 3, so that the deformation amplitude is smaller, and the possibility that the cover plate 4 deforms a color Newton ring at the edge position of the frame glue 3 is smaller due to the smaller deformation amplitude; therefore, in some possible embodiments, the first microstructure layer 7 may be disposed only in a region with a set distance with reference to the center of the region surrounded by the sealant 3. Further, the closer the first microstructure layer 7 is to the sealant 3, the smaller the distribution density is.

In other embodiments, the first microstructure layer 7 further includes a second portion in contact with the sealant 3, the second portion is connected to the first portion, and the first microstructure is also disposed on the second portion.

Based on the above description, it can be seen that the first microstructure layer 7 in some embodiments is a specific example of an matte layer, and the features of the first microstructure 71 in the first microstructure layer 7 can be taken into account by haze measurement. For example, the greater the haze of the first microstructure layer 7, the greater the number of the first microstructures 71, and the greater the distribution density, the more irregular the height variation of the microstructure layer surface 72 formed by the first microstructures 71. As can be seen from the above description of the principle of improvement of the color newton rings by the microstructure layer surface 72, the haze of the first microstructure layer 7 is positively correlated with the effect of improvement of the color newton rings.

However, the haze of the first microstructure layer 7 may affect the display effect of the display device. Fig. 15 is a graph of the relationship between haze and contrast of the display module according to some embodiments, where as shown in fig. 15, the abscissa is the haze and the ordinate is the influence on the contrast of the display module, and it can be seen from the curves in the graph that the higher the haze of the first microstructure layer 7 is, the greater the influence on the display contrast is, and thus the greater the influence on the image clarity is. That is, the haze of the first microstructure layer 7 is inversely related to the display effect.

Therefore, the haze of the first micro-structured layer 7 is generally not more than 10% in consideration of the combination of improvement of the color newton's rings and securing of the display definition. For example, in one specific example, the haze of the first microstructured layer 7 is 4%.

As an embodiment of the first microstructure layer 7, the first microstructure layer 7 may be an Anti-glare (AG) film, as shown in fig. 16, the AG film 8 includes an adhesive layer 81, a base 82, and an atomization functional layer 83, the atomization functional layer 83 is disposed on one side of the base 82, and the adhesive layer 81 is disposed on one side of the base 82 away from the atomization functional layer 83. The atomization functional layer 83 is subjected to AG treatment to form an uneven microstructure, and the AG treatment may be coating, spraying, embossing, or the like.

Taking coating as an example, a coating material coated with atomized particles 84 is coated on the base material 82, and the atomized particles 84 are left in the coating material after the coating material is dried to form a rugged microstructure; the refractive index of the coating is similar to that of the substrate 82 and therefore does not affect the optical effect.

The atomized particles 84 for forming the rugged microstructure in the AG film 8 are a specific example of the first microstructure 71, and the size of the atomized particles 84 is in the order of hundreds of nanometers and less, which is much smaller than the wave train length. As can be seen from the above description, when the AG film 8 is in contact with the light guide plate 61, some areas of the atomized particles 84 can change the optical path difference, if not prevent the occurrence of light interference, so as to change the direction of the interference circle, thereby improving or even eliminating the color newton's rings.

The AG film 8 may be entirely attached to the touch panel 41 or the cover glass 42 on the side close to the light guide plate 61 through the adhesive layer 81, and the refractive index of the adhesive layer 81 is usually close to that of glass, and the optical effect is not affected.

The haze is an important parameter of the AG film 8, and as can be seen from the above description, the haze of the AG film 8 is directly related to the improvement effect on the color newton ring, and is negatively related to the display effect, so that the haze of the AG film 8 is generally not more than 10% in consideration of the combination of the improvement effect on the color newton ring and the guarantee of the display definition.

As another embodiment of the first microstructure layer 7, referring to fig. 17, the first microstructure layer 7 may also be an atomized layer 9 on the cover plate 4, where the atomized layer 9 may be formed by performing AG treatment on the cover plate 4, where the AG treatment includes spraying, etching, sputtering, etching, and the like.

In another embodiment, the matte layer 9 may be formed by forming a base layer on the cover sheet 4 and then performing AG treatment on the base layer.

In some embodiments, referring to fig. 18, in order to reduce the reflectivity of the microstructure layer surface 72 of the first microstructure layer 7 to the air, so as to achieve the purpose of reducing the specular reflection, an anti-reflection (AR) layer 10 is formed on the microstructure layer surface 72, and the AR layer 10 may be formed by magnetron sputtering or vacuum coating.

In some embodiments, referring to fig. 19, the display module further includes a second microstructure layer 43, the second microstructure layer 43 is disposed on a side of the first microstructure layer 7 away from the front light module; for example, the second microstructure layer 43 may be directly disposed on the side of the first microstructure layer 7 away from the light guide plate 61, may be disposed between the touch panel 41 and the cover glass 42, or may be disposed on the side of the cover glass 42 away from the touch panel 41.

In the embodiment shown in fig. 19, the second microstructure layer 43 is provided between the touch panel 41 and the cover glass 42.

The second microstructure layer 43 is an atomizing layer with haze greater than that of the first microstructure layer 7, and the generated color newton's rings can be shielded to a certain extent by using the atomizing layer with higher haze. Illustratively, the haze of the second microstructure layer 43 is 20% or more.

As shown in fig. 20, in some products, in order to improve the optical performance of the light guide plate 61, the light guide plate 61 is provided with a light adjusting structure 613, and the light adjusting structure 613 may be a convex structure that is convex toward the cover plate 4 relative to the second side 612 of the light guide plate 61, a concave structure that is concave in a direction away from the cover plate 4, or a dot on the light guide plate 61. Optionally, the distribution density of the first microstructure layer 7 is greater than the distribution density of the dimming structure 613, so that the design can improve the color newton's ring on one hand, and on the other hand, the first microstructure layer 7 can also ensure that the cover plate 4 can be well supported when the cover plate 4 deforms and contacts the light guide plate 61.

The embodiment of the present disclosure also provides an electronic device, which is a product having an image (including a static image or a dynamic image, where the dynamic image may be a video) display function, for example, the electronic device may be: any one of a display, a mobile phone, a notebook computer, a tablet computer, a personal wearable device, a billboard, a digital photo frame, an electronic reader, and the like.

The display device has the same structure and beneficial technical effects as the display module provided in some embodiments, and the description is omitted here.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art will appreciate that changes or substitutions within the technical scope of the present disclosure are included in the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (15)

1. A display module is characterized by comprising a reflective display panel, a front light module and a cover plate; the front light module is arranged on the display side of the reflective display panel, and the cover plate is attached to one side, far away from the reflective display panel, of the front light module through a frame glue frame;

one side of the cover plate, which faces the front light module, is provided with a first micro-structural layer, the first micro-structural layer comprises a first part which is located in the frame glue surrounding area, and the first part comprises a plurality of first microstructures.

2. The display module according to claim 1, wherein at least one of the first microstructures has a different three-dimensional shape and/or size from another first microstructure.

3. The display module according to claim 1, wherein at least one of the first microstructures is not equal to another first microstructure with respect to a maximum height, a minimum height and/or a height difference of the first microstructures relative to the cover plate.

4. The display module according to claim 1, wherein the maximum dimension of at least one first microstructure is hundreds of nanometers or less, and the maximum dimension is the maximum value of the linear distance between any two points in the first microstructures.

5. The display module according to claim 1, wherein the first microstructure is a convex structure protruding toward the front light module or a concave structure recessed in a direction away from the front light module;

the first microstructure is spherical, hemispherical, pyramid-shaped or conical.

6. The display module according to any one of claims 1-5, wherein the plurality of first microstructures are continuously or nearly continuously distributed.

7. The display module according to claim 6, wherein the front light module comprises a light guide plate, one side of the light guide plate is attached to the reflective display panel, and the other side of the light guide plate is connected to the cover plate through the sealant;

in the surrounding area of the frame glue, the light guide plate is provided with a plurality of dimming structures;

the distribution density of the plurality of first microstructures is larger than that of the plurality of light adjusting structures.

8. The display module according to claim 1, wherein the first microstructure layer is an matte layer having a haze of 10% or less.

9. The display module according to claim 8, further comprising a second micro-structure layer disposed on a side of the first micro-structure layer away from the front light module, wherein the second micro-structure layer is an atomized layer having a haze greater than that of the first micro-structure layer.

10. The display module according to claim 9, wherein the haze of the second microstructure layer is 20% or more.

11. The display module according to any one of claims 8 to 10, wherein the first microstructure layer is an anti-glare film attached to the cover plate, the anti-glare film comprising a substrate and a plurality of atomized particles disposed on the substrate; the base material is attached to the cover plate, and the plurality of atomized particles form the plurality of first microstructures.

12. The display module according to any one of claims 8 to 10, wherein the first micro-structural layer is an atomized layer formed on the cover plate.

13. The display module of claim 1, further comprising an anti-reflection layer disposed on a side of the first microstructure layer away from the cover plate.

14. The display module according to claim 1, wherein the cover plate is a touch panel or/and a cover glass.

15. An electronic device, comprising the display module according to any one of claims 1 to 14.

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