CN113589567A

CN113589567A - Display module and preparation method thereof

Info

Publication number: CN113589567A
Application number: CN202110743877.XA
Authority: CN
Inventors: 柴宝燕; 韩立静
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-11-02
Anticipated expiration: 2041-06-30
Also published as: CN113589567B

Abstract

The embodiment of the invention discloses a display module and a preparation method thereof, wherein the display module comprises a display panel, a polaroid and a cover plate which are arranged in a stacked mode; the periphery of the display panel exceeds the periphery of the polaroid to form a first flange, the polaroid is provided with a first surface far away from one side of the display panel, and a first bonding layer is arranged between the first surface and the cover plate; the first adhesive layer covers the first surface of the polaroid and extends along the peripheral side surface of the polaroid and the surface of the display panel facing the polaroid, covers the side surface of the polaroid and forms a boss close to one side of the surface of the display panel facing the polaroid. The side face of the polaroid is extended and covered by the bonding layer, and the boss is formed on one side of the surface, close to the display panel and facing the polaroid, so that the contact area of the glue layer is greatly increased, and the risk of water inflow caused by incomplete wrapping due to the error of attachment is avoided; based on the same inventive concept, a preparation method of the display module is also provided, and the display module of the embodiment can be obtained.

Description

Display module and preparation method thereof

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display module and a preparation method of the display module.

Background

In recent years, electronic equipment is worn towards frivolous direction towards like intelligence, because consumer service environment's difference, the display screen inefficacy proportion of intaking constantly promotes, and each intelligence is dressed the firm and to wearing the waterproof nature requirement of product to the complete machine more and more high, and the screen can cause if intaking to show badly.

Disclosure of Invention

The invention provides a display module and a preparation method thereof, which can improve the waterproof effect of display equipment.

In a first aspect, the present application provides a display module, including a display panel, a polarizer and a cover plate, which are stacked;

the periphery of the display panel exceeds the periphery of the polaroid to form a first flange, the polaroid is provided with a first surface far away from one side of the display panel, and a first bonding layer is arranged between the first surface and the cover plate;

the first bonding layer covers the first surface of the polaroid, extends along the peripheral side surface of the polaroid and the surface of the display panel facing the polaroid, covers the side surface of the polaroid, and forms a boss on one side close to the surface of the display panel facing the polaroid.

On the other hand, the application provides another display module, which comprises a display panel, a polarizer and a cover plate which are arranged in a stacked mode;

the periphery of the cover plate exceeds the periphery of the polaroid to form a second flange, the polaroid is provided with a second surface close to one side of the display panel, and a second bonding layer is arranged between the second surface and the display panel;

the second adhesive layer covers the second surface of the polaroid, extends along the peripheral side surface of the polaroid and the surface of the cover plate facing the polaroid, covers the side surface of the polaroid, and forms a boss on one side close to the surface of the cover plate facing the polaroid.

In another aspect, the present application provides a method for manufacturing a display module, including providing a display panel; attaching the polarizer to the display panel;

the first bonding layer covers the first surface of the polaroid, the first bonding layer is vacuumized to enable the first bonding layer to cover the first surface of the polaroid and extend along the peripheral side surface of the polaroid and the surface of the display panel facing the polaroid, the side surface of the polaroid is covered, and a boss is formed on one side, close to the surface of the display panel facing the polaroid, of the display panel; and then the cover plate is attached to the polaroid through the first adhesive layer.

In another aspect, the present application provides a method for manufacturing a display module, including providing a cover plate; attaching the cover plate to the polaroid;

the second adhesive layer covers the second surface of the polaroid, the second adhesive layer is vacuumized to enable the first adhesive layer to cover the second surface of the polaroid and extend along the peripheral side surface of the polaroid and the surface of the cover plate facing the polaroid, the side surface of the polaroid is covered, and a boss is formed on one side, close to the cover plate, of the surface facing the polaroid; and then the display panel is attached to the polaroid through the second adhesive layer.

The display module comprises a display panel, a polaroid and a cover plate which are arranged in a stacked mode; the periphery of the display panel exceeds the periphery of the polaroid to form a first flange, the polaroid is provided with a first surface far away from one side of the display panel, and a first bonding layer is arranged between the first surface and the cover plate; the first adhesive layer covers the first surface of the polaroid and extends along the peripheral side surface of the polaroid and the surface of the display panel facing the polaroid, covers the side surface of the polaroid and forms a boss close to one side of the surface of the display panel facing the polaroid.

The application provides another display module which comprises a display panel, a polaroid and a cover plate which are arranged in a stacked mode; the periphery of the cover plate exceeds the periphery of the polaroid to form a second flange, the polaroid is provided with a second surface close to one side of the display panel, and a second bonding layer is arranged between the second surface and the display panel; the second adhesive layer covers the second surface of the polaroid and extends along the peripheral side surface of the polaroid and the surface of the cover plate facing the polaroid, covers the side surface of the polaroid and forms a boss on one side close to the surface of the cover plate facing the polaroid.

Utilize the bond line to extend the side that covers the polaroid to form the boss and strengthened the area of contact of glue film greatly near display panel towards surface one side of polaroid, avoided still having the risk of intaking because the parcel that the error of laminating caused is incomplete.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an overall structure of a display module according to the related art;

FIG. 2 is a schematic diagram of an overall structure of another display module in the related art;

FIG. 3 is a schematic view of an overall structure of a display module according to the present application;

FIG. 4 is a partially enlarged view of a first overall structure of a display module according to the present application;

FIG. 5 is a partially enlarged view of a second overall structure of the display module of the present application;

FIG. 6 is a partially enlarged view of a third overall structure of the display module of the present application;

FIG. 7 is a partial enlarged view of a fourth overall structure of a display module according to the present application;

FIG. 8 is a partially enlarged view of a fifth overall structure of a display module according to the present application;

FIG. 9 is a schematic view of an overall structure of another display module according to the present application;

FIG. 10 is a partially enlarged view of a first overall structure of another display module of the present application;

FIG. 11 is a partially enlarged view of a second overall structure of another display module of the present application;

FIG. 12 is a partially enlarged view of a third overall structure of another display module of the present application;

FIG. 13 is a partial enlarged view of a fourth overall structure of another display module of the present application;

FIG. 14 is a schematic view of another overall structure of another display module according to the present application;

FIG. 15 is a schematic view of another overall structure of another display module according to the present application;

FIG. 16 is a schematic view of another overall structure of another display module according to the present application;

fig. 17 is a process route diagram of a manufacturing method of a display module according to the present application;

FIG. 18 is a process route diagram of another display module manufacturing method of the present application;

FIG. 19 is a graph comparing the results of experiments performed in the present application;

fig. 20 is a display device provided in the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The display module provided in the embodiments of the present application will be described in detail below. The display module can be arranged in the electronic equipment, and the electronic equipment can be equipment such as a smart phone and a tablet personal computer.

In the related art, as shown in fig. 1, fig. 1 is a schematic diagram of an overall structure of a display module in the related art, a light-emitting side of a display panel 03 'is attached to a polarizer 01' so that when the polarizer works, a linear light incident from a light-emitting unit in the display panel is separated by a polarized light component, and a part of the linear light passes through the polarized light component, and the other part of the linear light is concealed by absorption, reflection, scattering and the like, so that light emitted from the light-emitting unit in the display panel is subjected to color separation and pressure reduction, and an image display effect of the display panel is controlled; to further protect the display panel, the cover plate 04 'is attached by the optical adhesive layer 02', and the cover plate is generally a transparent cover plate, so that the display panel can display through the cover plate.

As described above, in order to improve the image display effect, a polarizer is added, and a main effective component of a polarizing layer in the polarizer is PVA (Polyvinyl Alcohol), and a PVA film is manufactured by dyeing and stretching. The PVA film is dyed and adsorbs iodine molecules with a bidirectional absorption function, and the iodine molecules are orderly arranged on the PVA film through stretching, so that a polarizing film with uniform bidirectional absorption performance is formed; the transmission axis is perpendicular to the stretching direction. The basic processing technology of the polarizing layer can be divided into two series of dye system and iodine system according to a dyeing method, and can be divided into two series of dry-method stretching and wet-method stretching according to a stretching technology; the adjustment of the performances of the polarization degree, the transmittance, the color tone, the optical durability and the like can be realized by changing the material and the processing technology of the polarization layer. Further, since the polarizing layer made of the PVA film has the quality problems of easy water absorption, fading, loss of polarizing performance, etc., in the related art, a TAC (Triacetyl Cellulose) film with good optical uniformity and transparency is often disposed on each of two sides of the polarizing layer to prevent water and oxygen from corroding the polarizing layer, so as to protect the polarizing layer, thereby making the polarizer in the related art. In addition, the TAC film with ultraviolet isolation (UV CUT) and Anti-dazzle (Anti-Glare) functions can be used for manufacturing Anti-ultraviolet polaroids, Anti-dazzle polaroids and other application polaroids, so that the use requirements of different scenes are met.

Based on the analysis, the PVA film determines optical indexes such as polarization degree, transmittance and the like of the polarizer in the related technology, and is also a main factor influencing the performances such as color tone, optical durability and the like of the polarizer; and the TAC film also determines the optical durability of the polarizer. Therefore, the polarizer manufactured in the related art has a basic structure in which a PVA film is generally sandwiched between two TAC films. And above-mentioned structure, the side of polaroid exposes in atmospheric environment, and the polarisation layer PVA in the polaroid absorbs water and fades and lead to the polarization performance to lose, leads to the bad display such as white edge bubble, and not only the polaroid life-span descends, and display module's display reliability descends.

In order to solve the problem in the related art, a polarizer attachment structure is proposed, please refer to fig. 2, fig. 2 is a schematic diagram of an overall structure of another display module in the related art, as described in patent No. CN212781584U _ U, the polarizer attachment structure provided in the related art includes a polarizer 01, and further includes an OCA optical adhesive layer 02, and one side surface and the periphery of the polarizer 01 are covered with OCA optical adhesive, that is, the polarizer 01 is embedded in the OCA optical adhesive layer 02; the thickness of the optical adhesive layer is larger than that of the polarizer 01, because the OCA optical adhesive layer 02 has high adhesive force, small curing shrinkage, strong water resistance and high temperature resistance and excellent laminating offset filling property, the OCA optical adhesive layer 02 covers the periphery of the polarizer 01, so that water vapor cannot permeate into the polarizer 01 to corrode the polarizer 01, the service life is prolonged, and the reliability of the display module is enhanced. However, in the implementation process, the manufacturing process is difficult, and the cost is increased; because OCA's subsides and attaches the tolerance, there is the space between OCA and the polaroid, still has the risk of water oxygen invasion to the frivolous development trend of display module assembly is also not favorable to the OCA optical adhesive layer of thickening.

Based on the above analysis, in order to achieve a better water blocking effect, the present disclosure provides a display module, please refer to fig. 3, where fig. 3 is a schematic view of a first overall structure of the display module of the present application, including a display panel 30, a polarizer 10, and a cover plate 40, which are stacked; exemplarily, fig. 3 illustrates a self-luminous display panel, and in the related art, the OLED display panel includes an array substrate 31, a light emitting layer 32, and an encapsulation layer 33 sequentially stacked; wherein the array substrate 31 is mainly used to control the pixel units in the light emitting layer 32, an exemplary pixel unit includes at least two colors of sub-pixels, PX1, PX2, and PX3, so that the OLED display panel represents different colors. The array substrate includes a plurality of pixel circuits arranged in an array, the pixel circuits including Thin Film Transistors (TFTs) and pixel units connected to the pixel circuits. In the preparation process of the array substrate, the same film layer adopts the same process, the active layers among different pixel circuits are of an integrated graph structure, the active layers are not conductive, partial region conduction is realized by doping the active layers, and the conductive active layers can be electrically connected with the wiring layers to replace partial wiring. In a specific implementation, the active layer of each transistor may optionally include a polysilicon active layer or a metal oxide active layer. The polysilicon active layer can be formed by Low Temperature Polysilicon (LTPS) technology, and has the advantages of simple structure, good stability, high electron mobility, small circuit area, etc. Alternatively, the active layer may be a Low Temperature Polycrystalline Oxide (LPTO), which may be exemplified by 2T1c, 7T1C, and the like.

In other embodiments, the display panel may also be an LCD panel, and the LCD display panel in the related art includes a backlight source, a lower polarizer, an array substrate, a liquid crystal layer, a color filter, an upper polarizer, and a transparent cover plate, which are stacked. The backlight source is mainly used for providing a light source for the LCD screen, and the array substrate is mainly used for controlling the liquid crystal molecules in the liquid crystal layer to deflect, so that light beams with different brightness reach the color film filter. The vegetable farming filter is provided with a plurality of color sub-pixels which are arranged in an array mode and used for enabling the LCD display panel to display different colors. Of course, the display panel may also be other display panels, such as Micro-LED, Mini LED, quantum dot, etc., which are not described herein again. It should be noted that the present application is not limited to a flexible display panel or a rigid display panel.

The encapsulation layer 33 is mainly used for isolating water and oxygen to prevent the luminescent layer from being corroded by water and oxygen, and prolong the service life of the luminescent layer 33, for example, a rigid Frit encapsulation can be performed, a flexible TFE encapsulation can be performed, specifically, an inorganic-organic-inorganic laminated structure can be performed, and a multilayer inorganic and organic laminated structure can be performed to increase the encapsulation reliability; the cover plate 40 may be glass or the like having a function of protecting the display panel.

More specifically, referring to fig. 4, fig. 4 is a partially enlarged schematic view of a first overall structure of the display module of the present application; wherein the peripheral edge L3 of the display panel 30 exceeds the peripheral edge L1 of the polarizer 10 to form the first flange FL, and more specifically, in some embodiments, the size of the polarizer 10 is smaller than the size of the display panel 30, so as to reduce the reflection of ambient light by the OLED display device and reduce the display contrast and visibility, the orthographic projection of the polarizer 10 on the display panel 30 is located in the display panel 30, so as to form a step region, and the first flange FL is located in the non-display region. More specifically, the polarizer 10 has a first surface 101 on a side away from the display panel 30, and a first adhesive layer 20 is disposed between the first surface 101 and the cover plate 40; the first adhesive layer 20 is mainly used to increase the bonding strength of the remaining cover plate 40 of the polarizer 10, thereby increasing the structural strength of the cover plate assembly. Alternatively, the first Adhesive layer 10 may be one or more of OCA (optical Clear Adhesive), PSA (Pressure Sensitive Adhesive), and the like. Since the polarizing layer PVA film is sensitive to moisture, the first adhesive layer 20 may be preferably OCA optical glue.

The first adhesive layer 20 covers the first surface 101 of the polarizer 10 and extends along the peripheral side of the polarizer and the surface of the display panel facing the polarizer, covers the side of the polarizer 10, and forms a boss 60 near the surface of the display panel 30 facing the polarizer. In the present application, the size of the first adhesive layer 20 is larger than the size of the polarizer 10, and the orthographic projection of the polarizer 10 on the first adhesive layer 20 is located in the first adhesive layer 20, and first, the size of the first adhesive layer 20 beyond the periphery of the polarizer 10 is larger than the thickness of the polarizer, so that the side edge of the polarizer can be sealed by using the first adhesive layer 20 itself, and meanwhile, the first adhesive layer 20 can also extend to the surface of the display panel 30 facing the polarizer 10 to cover at least part of the surface of the display panel 30, i.e., a step is formed at the flange of the display panel 30, so that the contact area of the first adhesive layer 20 can be increased, and it is avoided that a part of gaps still exist in the display panel 30 due to the fitting error, so that part of the side surface of the polarizer is still exposed to the atmosphere, and the polarizer 10 fails. The integrated packaging by utilizing the first bonding layer is equivalent to the omnibearing wrapping of the polaroid, so that the side surface of the polaroid achieves a good water and oxygen blocking effect, the service life of the polaroid is prolonged, and meanwhile, the process is simple and is suitable for the development trend of lightness and thinness of electronic equipment.

It should be noted that, in some embodiments, after the bosses 60 are formed and the side of the polarizer 10 is completely sealed, the orthographic projection of the first adhesive layer 20 on the display panel 30 is still located in the display panel, i.e., the peripheral edge L2 of the first adhesive layer 20 does not exceed the peripheral edge L3 of the display panel 30, and the peripheral edge L2 of the first adhesive layer 20 may be flush with the peripheral edge L3 of the display panel 30, so that no additional bezel is occupied, and the process difficulty is reduced.

In some embodiments, further, the thickness of the polarizer 10 is T1, and the thickness of the first adhesive layer 20 attached to the peripheral side of the polarizer is T2, wherein T2 is greater than or equal to T1. With reference to fig. 4, since the first adhesive layer 20 on the side surface may be squeezed by a fixture to become thin or may be deformed by stretching to become thin, thereby affecting the waterproof sealing effect, the thickness of the first adhesive layer 20 attached to the peripheral side surface of the polarizer is greater than the thickness of the polarizer, thereby ensuring a good waterproof and oxygen-tight sealing effect, and relieving the tensile stress caused by the step of the first adhesive layer, so that the boss 60 is better bonded with the surface of the display panel 30 facing the polarizer 10, thereby preventing the polarizer from failing due to the intrusion of water and oxygen.

It should be further noted that the thickness in the drawings of the specification is enlarged to embody the hierarchical relationship, and the size in the drawings does not represent the actual size, but is provided for illustration only.

In some embodiments, with continued reference to fig. 3-4, the polarizer 10 has a second surface 102 near one side of the display panel 30, a second adhesive layer 50 is disposed between the second surface 102 and the display panel 30, and the first adhesive layer 20 covers the second adhesive layer 50. The second adhesive layer 50 is mainly used for assembling the polarizer 10 and the display panel 30, wherein the second adhesive layer 50 includes an optical adhesive layer such as OCA, and a pressure sensitive adhesive such as PSA, and the second adhesive layer 50 may preferably be a PSA pressure sensitive adhesive in view of cost.

In some embodiments, referring to fig. 5, fig. 5 is a partial enlarged view of a second overall structure of the display module of the present application, in which an orthographic projection of the polarizer 10 on the second adhesive layer 50 is located in the second adhesive layer 50, and a peripheral edge of the second adhesive layer 50 may slightly exceed a peripheral edge of the polarizer, or may be flush with the peripheral edge of the polarizer, so that the first adhesive layer 20 extends along a side surface of the polarizer 10 and continues to extend along the second adhesive layer 50, so that the first adhesive layer 20 covers the side surface of the polarizer 10 while covering the side surface of the second adhesive layer (see fig. 4) or covers a part of the surface and the side surface of the second adhesive layer 50 (see fig. 5), thereby forming multiple steps and greatly increasing a contact area; since the second adhesive layer 50 itself serves as an adhesive, the contact of the first adhesive layer 20 with the second adhesive layer 50 enhances the adhesive effect of the first adhesive layer 20, thereby enhancing the waterproof sealing effect of the lateral periphery of the polarizer 10.

In other embodiments, please refer to fig. 6 in combination with fig. 3, and fig. 6 is a partially enlarged schematic view of a third overall structure of the display module of the present application; the periphery of the polarizer 10 exceeds the periphery of the second adhesive layer 50, a first groove SA is formed on the second surface 102 of the polarizer, the side surface of the second adhesive layer, and the surface of the display panel facing the polarizer, and the first adhesive layer 50 is at least partially filled in the first groove SA. In this embodiment, the orthographic projection of the polarizer 10 on the second adhesive layer 50 is located to cover the second adhesive layer 50, that is, the size of the second adhesive layer 50 is smaller than that of the polarizer, for example, the difference distance is a, so that the adhesion effect between the polarizer and the display panel can be realized. Then, the second surface 102 of the polarizer, the side surface of the second adhesive layer, and the surface of the display panel facing the polarizer form a partially semi-enclosed space, and when the first adhesive layer 20 is squeezed or stretched, at least a portion of the first adhesive layer 20 fills the semi-enclosed space of the formed groove SA, thereby further increasing the contact area of the first adhesive layer 20, and simultaneously, the contact with the second adhesive layer 50 enhances the bonding effect, and has a better waterproof sealing effect on the side surface of the polarizer 10.

In particular, with continued reference to FIGS. 3-6, the second adhesive layer 50 has a thickness T3 and the first adhesive layer 20 has an extension D greater than T1+ T3. To ensure the adhesion effect of the bosses 60, the outer edge dimension of the first adhesive layer 20 is at least larger than the sum of the thicknesses of the polarizers, i.e., the second adhesive layer.

In some embodiments, as described above, the display panel 30 includes the array substrate 31, the light emitting layer 32 and the encapsulation layer 33, and the bump 60 is formed on the surface of the encapsulation layer 33, as shown in fig. 3-6, and the encapsulation layer 33 further includes a first inorganic layer, an organic layer and a second inorganic layer, wherein the organic layer is stacked on the first inorganic layer, and the second inorganic layer is stacked on the organic layer, so that the encapsulation layer 33 forms a composite structure in which the inorganic layer and the organic layer are stacked on each other. The first inorganic layer and the second inorganic layer are mainly used as barrier layers and play a role in isolating water and oxygen; the organic layer is mainly sandwiched between the first inorganic layer and the second inorganic layer as a buffer layer, and is used for increasing the flexibility and the bendability of the first encapsulation layer, so that the impact resistance of the encapsulation layer 33 is increased, and the reliability of the display panel is further increased. In other embodiments, the encapsulation layer 33 may further include multiple inorganic layers and multiple organic layers sequentially stacked, for example, three inorganic layers and two organic layers sequentially stacked, so that the encapsulation layer 33 may form a five-layer composite structure in which the organic layers and the inorganic layers are stacked on each other, which is not described herein again. The inorganic surface also has a certain roughness, which is more advantageous for the bonding force of the first adhesive layer 20.

Optionally, in some specific embodiments, please refer to fig. 7, and fig. 7 is a partially enlarged schematic view of a fourth overall structure of the display module of the present application; the display panel includes an array substrate 31, a light emitting layer 32, an encapsulation layer 33 and a touch layer 34, which are stacked, and a bump 60 is formed on the surface of the touch layer 34. In this embodiment, tpot (touch Panel On tfe) is exemplarily used, that is, a touch electrode is formed On the encapsulation film, the touch further includes a sensing area and a wiring area, the touch electrode includes touch sensing electrodes and touch receiving electrodes arranged in an array, and is disposed On a base layer of the sensing area, and the pin is disposed On the base layer of the wiring area; the electric signal generated by touch is transmitted to the driving chip through the touch wiring input pin, so that the touch signal is sensed to realize the touch function. The surface of the touch layer also has a certain roughness, and the bonding force of the first bonding layer 20 is enhanced.

In other embodiments, please refer to fig. 8, wherein fig. 8 is a partially enlarged schematic view of a fifth overall structure of the display module of the present application; the polarizer 10 has a second surface 102 close to one side of the display panel 30, and a second adhesive layer 50 is disposed between the second surface 102 and the display panel 30; the periphery of the second adhesive layer 50 extends beyond the periphery of the polarizer 10, and the boss 60 is formed on the surface of the second adhesive layer 50. The function and material of the second adhesive layer 50 are as described above, and will not be described herein. Different from the foregoing, in the present embodiment, the orthographic projection of the polarizer 10 on the second adhesive layer 50 is located in the second adhesive layer 50, the peripheral edge of the second adhesive layer 50 exceeds the peripheral edge of the polarizer and extends to the peripheral edge of the display panel 30 to form another step, which may be defined as a third flange, and the peripheral edge of the second adhesive layer 50 is slightly smaller than the peripheral edge of the display panel 30 or is flush with the peripheral edge of the display panel 30, so as not to occupy the frame of the display panel; thus, the first adhesive layer 20 extends along the side of the polarizer 10 and continues to extend along the second adhesive layer 50, so that the first adhesive layer 20 covers the side of the polarizer 10 and continues to extend on the surface of the second adhesive layer 50 facing the polarizer 10 and covers at least part of the periphery of the second adhesive layer 50, the contact area of the first adhesive layer 20 and the second adhesive layer 50 is greatly increased, the adhesion of the first adhesive layer is firmer, and the waterproof and oxygen-proof sealing performance is more excellent.

Based on the same inventive concept, the present application provides another display module, as shown in fig. 9-10, fig. 9 is a schematic view of an overall structure of another display module of the present application; FIG. 10 is a partially enlarged view of a first overall structure of another display module of the present application; specifically, the display panel comprises a display panel 30, a polarizer 10 and a cover plate 40 which are arranged in a stacked manner; the display panel, the polarizer and the cover plate are as described above, and are not described herein again.

Further, the periphery of the cover plate 40 exceeds the periphery of the polarizer 10 to form a second flange SL, the polarizer 10 has a second surface 102 close to one side of the display panel 30, and a second adhesive layer 50 is disposed between the second surface 102 and the display panel 30; the second adhesive layer 50 is mainly used for assembling the polarizer 10 and the display panel 30, wherein the second adhesive layer 50 includes one or a combination of an optical adhesive layer such as OCA and a pressure sensitive adhesive such as PSA.

The second adhesive layer 50 covers the second surface 102 of the polarizer 10 and extends along the peripheral side of the polarizer 10 and the surface of the cover plate 40 facing the polarizer 10, covers the side of the polarizer 10, and forms a boss 60 near the surface of the cover plate 40 facing the polarizer 40. In the present application, the size of the second adhesive layer 50 is larger than the size of the polarizer 10, and the orthographic projection of the polarizer 10 on the second adhesive layer 50 is located in the second adhesive layer 50, and first, the size of the second adhesive layer 50 exceeding the periphery of the polarizer 10 is larger than the thickness of the polarizer, so that the side edge of the polarizer can be sealed by using the second adhesive layer 50 itself, and meanwhile, the second adhesive layer 50 can also extend to the surface of the side of the cover plate 40 facing the polarizer 10 to cover at least part of the surface of the cover plate 40, i.e., a step is formed at the flange SL of the cover plate 40, so that the contact area of the second adhesive layer 50 can be increased, and it is avoided that a part of a gap still exists between the second adhesive layer 50 and the cover plate 40 due to a fitting error, so that part of the side surface of the polarizer is still exposed to the atmospheric environment, and the polarizer 10 fails. The integrated packaging by using the second bonding layer is equivalent to the omnibearing wrapping of the polaroid, so that the side surface of the polaroid can achieve a good water and oxygen blocking effect, the service life of the polaroid is prolonged, and meanwhile, the process is simple and is suitable for the development trend of lightness and thinness of electronic equipment.

In some embodiments, the 10 polarizer has a first surface 101 on a side away from the display panel 30, a third adhesive layer (corresponding to the first adhesive layer 20) is disposed between the first surface 101 and the cover plate 40, and the second adhesive layer 20 covers the third adhesive layer. Referring to fig. 9-10, the third adhesive layer is mainly used to increase the bonding strength between the polarizer 10 and the cover plate 40, thereby increasing the structural strength of the cover plate assembly. Alternatively, the third Adhesive layer may be one or more of OCA (optical Clear Adhesive), PSA (Pressure Sensitive Adhesive), and the like. Since the polarizing layer PVA film is sensitive to moisture, OCA optical cement may be preferable.

In some embodiments, the orthographic projection of the polarizer 10 on the third adhesive layer 20 is located in the third adhesive layer 20, that is, the periphery of the third adhesive layer 20 may slightly exceed the periphery of the polarizer, or may be flush with the periphery of the polarizer, so that the second adhesive layer 50 extends along the side of the polarizer 10 and continues along the third adhesive layer 20, so that the second adhesive layer 50 covers the side of the polarizer 10 and covers the side of the third adhesive layer (see fig. 9) or covers part of the surface and the side of the third adhesive layer 20 (see fig. 10), forming multi-step steps, which greatly increases the contact area; since the third adhesive layer 20 itself serves as an adhesive, the contact of the second adhesive layer 50 with the third adhesive layer 20 enhances the adhesive effect of the second adhesive layer 50, thereby enhancing the waterproof sealing effect of the lateral periphery of the polarizer 10.

In other alternative embodiments, the periphery of the polarizer 10 exceeds the periphery of the third adhesive layer, the first surface 101 of the polarizer 10, the side of the third adhesive layer, and the surface of the cover plate 40 facing the polarizer 10 form a second groove SB, and the second adhesive layer 50 at least partially fills the second groove SB. Please refer to fig. 11 in combination with fig. 9, fig. 11 is a partially enlarged schematic view of a second overall structure of another display module according to the present application; in this embodiment, the polarizer 10 orthographically projects on the third adhesive layer 20 to cover the third adhesive layer 20, that is, the size of the third adhesive layer 20 is smaller than that of the polarizer, for example, the difference is B, so that the adhesion effect between the polarizer and the cover plate can be achieved. Therefore, the first surface 101 of the polarizer, the side surface of the third adhesive layer, and the surface of the cover plate facing the polarizer form a partially semi-closed space, when the second adhesive layer 50 is squeezed or stretched, at least a portion of the second adhesive layer 50 will be filled in the semi-closed space of the formed groove SB, so as to further increase the contact area of the second adhesive layer 50, and meanwhile, the contact with the third adhesive layer 20 enhances the bonding effect, and thus, the polarizer 10 has a better waterproof sealing effect on the side surface.

In still other alternative embodiments, please refer to fig. 12, in which fig. 12 is a partially enlarged schematic view of a third overall structure of another display module according to the present application; the polarizer 10 has a first surface 101 on a side away from the display panel 30, a third adhesive layer (corresponding to the first adhesive layer 20) is disposed between the first surface 101 and the cover plate 40, and the protrusion 60 is formed on the surface of the third adhesive layer. The function and material of the third adhesive layer 20 are as described above, and will not be described herein. Different from the foregoing, in the present embodiment, the orthographic projection of the polarizer 10 on the third adhesive layer 20 is located in the third adhesive layer 20, the peripheral edge of the third adhesive layer 20 exceeds the peripheral edge of the polarizer and extends to the peripheral edge of the cover plate 40 to form a further step, which may be defined as a fourth flange, and the peripheral edge of the third adhesive layer 20 is slightly smaller than the peripheral edge of the cover plate 40 or is flush with the peripheral edge of the cover plate 40, so as not to occupy the frame of the display panel; thus, the second adhesive layer 50 extends along the side of the polarizer 10 and continues to extend along the third adhesive layer 20, so that the second adhesive layer 50 covers the side of the polarizer 10 and continues to extend on the surface of the third adhesive layer 20 facing the side of the polarizer 10 and covers at least part of the periphery of the third adhesive layer 20, which greatly increases the contact area between the second adhesive layer 50 and the third adhesive layer 20, makes the adhesion of the first adhesive layer firmer, and makes the waterproof and oxygen-proof performance more excellent.

Optionally, in order to further enhance the adhesion strength between the second adhesive layer 50 and the cover plate, the surface of the cover plate second flange SL facing the polarizer 10 is rough. Please refer to fig. 13, fig. 13 is a partial enlarged schematic view of a fourth overall structure of another display module according to the present application; the flange SL of the cover plate 40 may be polished or otherwise processed on a surface of the polarizer 10 near one side thereof to increase surface roughness, and the rough surface may increase adhesion with the second adhesive layer 50, thereby improving the waterproof and oxygen-tight effect of the polarizer 10.

Optionally, the cover plate 40 may further include a groove 402, and the polarizer 10 is embedded in the groove 402, please refer to fig. 14, and fig. 14 is another schematic overall structure diagram of another display module of the present application; referring to fig. 14, the cover plate 40 may be provided with a groove 402 for accommodating the polarizer 10, and a third adhesive layer 20 may be disposed between the first surface 101 of the polarizer 10 and the bottom surface of the groove 402, so that the polarizer 10 and the cover plate are more firmly fixed, which is not limited in this application. The second adhesive layer 30 covers the second surface 102 of the polarizer 10 and extends along the side of the polarizer 10 to cover the side of the polarizer 10 and the flange of the cover 40, i.e., the surface of the cover facing the polarizer 10. The polarizer is embedded into the cover plate, so that the whole display module is thinner and thinner, and meanwhile, the cover plate and the second adhesive layer 50 have the combined action, so that the sealing effect of the side edge of the polarizer 10 is enhanced.

In another alternative embodiment (not shown), the depth of the groove 402 may be the same as the depth of the polarizer 10, or the same as the sum of the thicknesses of the polarizer and the third adhesive layer, so that the polarizer may be completely embedded in the cover plate, and the second adhesive layer 50 completely covers the polarizer 10, that is, the orthographic projection of the groove 402 on the second adhesive layer 50 is completely in the second adhesive layer 50, the size of the second adhesive layer 50 is larger than that of the groove 402, and the periphery of the second adhesive layer is bonded to the periphery of the cover plate 40, so that the display module is further thinner and lighter, the path of water and oxygen intrusion is extended, and a better waterproof effect is achieved.

Optionally, in some specific embodiments, the display module further includes a compensation layer 70, and the compensation layer 70 is located between the second adhesive layer 50 and the display panel 30. Fig. 15 and 15 are schematic views showing another overall structure of another display module according to the present invention, and referring to fig. 15, the effective component PVA in the polarizer 10 has different water repellency from the compensation layer 70, and has different performances in different polarizers, for example, if the effective component PVA in the polarizer 10 fails first and the frame is narrow, the polarizer 10 may be sealed by using the first adhesive layer 20 or the second adhesive layer 50 as described in the previous embodiment, and the compensation layer 70 may be coated on the side of the display panel close to the polarizer 10 by lc (liquid crystal) coating, where the compensation layer 70 may be an 1/4 wavelength phase film and forms a circular polarizer with the polarizer 10, so as to eliminate the reflected light after the ambient light irradiates the display panel 30, thereby improving the contrast of the display panel.

Optionally, in some other embodiments, the compensation layer 70 may be encapsulated in the display panel 30, as shown in fig. 16, fig. 16 is a schematic view of another overall structure of another display module according to the present application; referring to fig. 16, as mentioned above, the effective component PVA in the polarizer 10 and the compensation layer 70 have different water repellency, and have different performances in different polarizers, and for the poor water repellency of the compensation layer or the failure of the effective component PVA in the compensation layer 70 prior to the polarizer 10, the compensation layer may be directly coated on the light emitting surface side of the light emitting layer (OLED device) by lc (liquid crystal) coating, or packaged inside the display panel on the back of the TP glass (rigid package cover plate).

It should be noted that the compensation layer 70 may also be packaged with the polarizer 10 in the first adhesive layer 20 (in the embodiment of fig. 3-8) or packaged with the polarizer 10 in the second adhesive layer 50 (in the embodiment of fig. 10-14), so that the compensation layer is also protected from moisture.

Based on the same inventive concept, on the basis of the embodiment of the present application, the embodiment of the present application further provides a method for manufacturing a display module, the method breaks through the conventional module assembly process flow, and the display module in fig. 3-8 can be obtained by recombining the process flows, specifically please refer to fig. 17, where fig. 17 is a process route diagram of the method for manufacturing a display module; correspondingly, referring to fig. 17, a method for manufacturing a display module according to an embodiment of the present application includes:

s1, providing a display panel;

the display panel is as described above and will not be described herein.

S2, attaching the polarizer to the display panel;

the second adhesive layer may be coated on the surface of the display panel, and further, the second adhesive layer may be an OCA optical adhesive, a PSA pressure sensitive adhesive, or the like, and then the polarizer may be directly attached to the surface of the second adhesive layer by vacuum adsorption.

S3, covering the first adhesive layer on the first surface of the polaroid, vacuumizing to enable the first adhesive layer to cover the first surface of the polaroid and extend along the peripheral side surface of the polaroid and the surface of the display panel facing the polaroid, covering the side surface of the polaroid, and forming a boss on one side close to the surface of the display panel facing the polaroid;

the first adhesive layer may be an OCA optical adhesive, a PSA pressure sensitive adhesive, or the like, and is preferably an OCA optical adhesive.

The first adhesive layer can be covered on the surface of the polaroid through vacuum adsorption, the size of the first adhesive layer is larger than that of the polaroid, then the periphery of the first adhesive layer protruding out of the polaroid is continuously pressed and adsorbed through further adsorption and pressing, the side face of the polaroid is covered and extends towards the surface of the polaroid along the display panel, at least part of the display panel is covered, a boss is formed on one side of the surface of the display panel, which faces towards the polaroid, and the polaroid is packaged.

And S4, attaching the cover plate to the polaroid through the first adhesive layer.

The cover plate can be a transparent glass cover plate, and the cover plate is attached to the polaroid through the first adhesive layer, so that the display module is manufactured.

In the related module preparation method, a first adhesive layer is firstly attached to a polaroid, then the polaroid adhered with the first adhesive layer is attached to a display panel, and then a cover plate is attached to the polaroid through the first adhesive layer; compare in the module preparation method among the correlation technique, this application has only changed the laminating order of first bond line, does not increase the technology degree of difficulty, can realize the waterproof sealing and the module preparation of polaroid in step, possesses certain furtherance, has promoted display module's waterproof performance.

Based on the same concept of the invention, the application also provides another preparation method of the display module, the method breaks through the conventional module assembly process flow, the display module in fig. 9-16 can be obtained by recombining the process flow, and specific reference is made to fig. 18, and fig. 18 is a process route diagram of the preparation method of the display module; correspondingly, referring to fig. 18, a method for manufacturing a display module according to an embodiment of the present disclosure includes:

s1, providing a cover plate;

the cover plate may be the transparent glass cover plate described above, or other display cover plates having a function of protecting the display panel, which is not described herein again.

S2, attaching the cover plate to the polaroid;

the polarizer may be attached to the cover plate by vacuum absorption after a third adhesive layer is coated on the cover plate, where the third adhesive layer may be an OCA optical adhesive, a PSA pressure-sensitive adhesive, or the like, and is preferably an OCA optical adhesive.

S3, the second adhesive layer covers the second surface of the polaroid, the second adhesive layer is vacuumized to enable the first adhesive layer to cover the second surface of the polaroid and extend along the peripheral side surface of the polaroid and the surface of the cover plate facing the polaroid, the side surface of the polaroid is covered, and a boss is formed on one side, close to the cover plate, of the surface facing the polaroid;

the second adhesive layer can be covered on the surface of the polaroid through vacuum adsorption, the size of the second adhesive layer is larger than that of the polaroid, then the periphery of the second adhesive layer protruding out of the polaroid is continuously pressed down for adsorption through further adsorption and pressing, the side face of the polaroid is covered and extends towards the surface of the polaroid along the cover plate, at least part of the cover plate is covered, a boss is formed on one side of the surface of the cover plate, which faces the polaroid, and the cover plate assembly is formed by packaging the polaroid.

Wherein the second adhesive layer may be OCA optical adhesive, PSA pressure sensitive adhesive, or the like.

And S4, laminating the display panel with the polaroid through the second adhesive layer.

The display panel is as described above, and is not described herein again.

And the side, provided with the second bonding layer, of the cover plate assembly faces the display cover plate, the display panel is attached to the polaroid through the second bonding layer, and the attachment of the cover plate assembly and the display panel is completed, so that the display module is formed.

The manufacturing method of the display module in the related art is as described above, and is not described herein again. Compare in the preparation of display module assembly among the correlation technique, changed the laminating process in this application, not increased the technology complexity, utilize the second bond line with polaroid encapsulation and apron formation apron subassembly, then laminate with display panel, accomplish display module assembly's preparation, guaranteed the waterproof performance of polaroid simultaneously, possess certain progressive nature.

For the embodiment of the present application, the applicant has further studied, and the effect of the related art can be seen in fig. 19, fig. 19 is a comparative graph of the experimental effect of the present application, as shown in fig. 19, E1 is a display module of the related art, E2 is a display module of the present application, and when both the E1 and the E2 display modules are placed in water, it can be further found that the color change has occurred at the periphery of the E1 display module, but the polarizer of the E2 display module has not changed, which indicates that the first adhesive layer, for example, the OCA optical adhesive has water resistance, and the implementation method can make the polarizer have good water-proof and oxygen-proof sealing performance.

Based on the same conception, the application provides a structural schematic diagram of a display device. As shown in fig. 20, a display device 100 provided in an embodiment of the present invention includes the display panel 100 provided in an embodiment of the present invention. The display device 100 may be any electronic device having a display function, such as a touch display screen, a mobile phone, a watch, or the like, or a tablet computer, a notebook computer, or a television.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display module is characterized by comprising a display panel, a polaroid and a cover plate which are arranged in a stacked mode;

2. The display module of claim 1, wherein the polarizer has a thickness of T1, the first adhesive layer attached to the peripheral side of the polarizer has a thickness of T2, and wherein T2 is greater than or equal to T1.

3. The display module of claim 1, wherein the first adhesive layer has a periphery that does not extend beyond a periphery of the display panel.

4. The display module of claim 1, wherein the polarizer has a second surface adjacent to one side of the display panel, a second adhesive layer is disposed between the second surface and the display panel, and the first adhesive layer covers the second adhesive layer.

5. The display module according to claim 4, wherein the periphery of the polarizer exceeds the periphery of the second adhesive layer, a first groove is formed on the second surface of the polarizer, the side surface of the second adhesive layer and the surface of the display panel facing the polarizer, and the first adhesive layer at least partially fills the first groove.

6. The display module as claimed in claim 4, wherein the display panel comprises an array substrate, a light emitting layer and an encapsulation layer, and the projection is formed on the surface of the encapsulation layer.

7. The display module assembly of claim 4, wherein the display panel comprises an array substrate, a light emitting layer, an encapsulation layer and a touch layer, which are stacked, and the boss is formed on the surface of the touch layer.

8. The display module of claim 1, wherein the polarizer has a second surface adjacent to one side of the display panel, and a second adhesive layer is disposed between the second surface and the display panel; the periphery of the second adhesive layer exceeds the periphery of the polaroid, and the boss is formed on the surface of the second adhesive layer.

9. The display module of claim 1, wherein the first adhesive layer comprises one or a combination of an O-optical adhesive and a pressure sensitive adhesive.

10. The display module of claim 1, wherein the second adhesive layer has a thickness of T3, and the first adhesive layer has an extension length greater than T1+ T3.

11. A display module is characterized by comprising a display panel, a polaroid and a cover plate which are arranged in a stacked mode;

12. The display module of claim 11, wherein the surface of the cover plate second flange facing the polarizer is roughened.

13. The display module of claim 11, wherein the polarizer has a first surface on a side away from the display panel, a third adhesive layer is disposed between the first surface and the cover plate, and the second adhesive layer covers the third adhesive layer.

14. The display module according to claim 13, wherein the periphery of the polarizer exceeds the periphery of the third adhesive layer, a second groove is formed on the first surface of the polarizer, the side surface of the third adhesive layer, and the surface of the cover plate facing the polarizer, and the second adhesive layer at least partially fills the second groove.

15. The display module according to claim 11, wherein the polarizer has a first surface on a side away from the display panel, a third adhesive layer is disposed between the first surface and the cover plate, a peripheral edge of the third adhesive layer extends beyond a peripheral edge of the polarizer, and the protrusion is formed on a surface of the third adhesive layer.

16. The display module of claim 11, wherein the cover plate comprises a recess, and the polarizer is embedded in the recess.

17. The display module of claim 11, further comprising a compensation layer between the second adhesive layer and the display panel.

18. The display module of claim 11, further comprising a compensation layer in the display panel.

19. The display module of claim 11, wherein the second adhesive layer comprises one or a combination of a pressure sensitive adhesive and an optical adhesive layer.

20. A method for manufacturing a display module, applied to the display module of claims 1-10, wherein the method comprises the following steps:

providing a display panel;

attaching the polarizer to the display panel;

the first bonding layer covers the first surface of the polaroid, the first bonding layer is vacuumized to enable the first bonding layer to cover the first surface of the polaroid and extend along the peripheral side surface of the polaroid and the surface of the display panel facing the polaroid, the side surface of the polaroid is covered, and a boss is formed on one side, close to the surface of the display panel facing the polaroid, of the display panel;

and then the cover plate is attached to the polaroid through the first adhesive layer.

21. A method for manufacturing a display module, applied to the display module of claims 11-15, wherein the method comprises the following steps:

providing a cover plate;

attaching the cover plate to the polaroid;

the second adhesive layer covers the second surface of the polaroid, the second adhesive layer is vacuumized to enable the first adhesive layer to cover the second surface of the polaroid and extend along the peripheral side surface of the polaroid and the surface of the cover plate facing the polaroid, the side surface of the polaroid is covered, and a boss is formed on one side, close to the cover plate, of the surface facing the polaroid;

and then the display panel is attached to the polaroid through the second adhesive layer.