CN114882802B

CN114882802B - Display module and electronic equipment

Info

Publication number: CN114882802B
Application number: CN202210484200.3A
Authority: CN
Inventors: 杨柳
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2023-09-12
Anticipated expiration: 2042-05-06
Also published as: CN114882802A

Abstract

The application discloses a display module, which is characterized in that a first edge protection part is arranged at the edge of a buffer body of a buffer layer, extends towards a lens layer and wraps at least part of the edge of an inner screen to protect the edge of the inner screen, so that the strength performance of CG/TFT in falling is improved; further, the lens layer is close to the inner screen and extends towards the buffer layer to form a second edge protection part, at least part of the edge of the inner screen is wrapped by the inner side of the second edge protection part, stress concentration at the protruding shape of the inner screen is avoided, and the unloading protection effect on the edge of the inner screen is achieved. The application also discloses electronic equipment applying the display module, which can be particularly a wearable equipment or a mobile phone.

Description

Display module and electronic equipment

Technical Field

The application relates to the technical field of display equipment, in particular to the technical field of OLED (organic light emitting diode), and particularly relates to a display module and electronic equipment.

Background

Because the electronic equipment has a complex structure, the electronic equipment needs to be protected when in use and storage, and the phenomenon that the electronic equipment is damaged due to the influence of external factors is avoided.

The anti-falling performance of the electronic equipment is a key parameter and is provided with corresponding drop tests and qualification indexes. If the strength of the wearing product/mobile phone product falls down, the performance is important in the new product trial production stage, and particularly, the protection effect of the display module is achieved.

In existing structures, often the individual drop performance of the lens can pass the test, but the breakage involving the internal screen CG/TFT can lead to sample failure. When the whole client falls, the products fall in 6 directions. There is a CG/TFT cracking situation because the top corners of the product are fragile.

Therefore, how to improve the anti-falling performance of the electronic device, especially the strength performance of the display device in falling, is an important technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of this, the application provides a display module, which improves the strength performance of CG/TFT in falling through the design of the lens structure and the foam structure in the module.

The application also provides electronic equipment applying the display module.

In order to achieve the above purpose, the present application provides the following technical solutions:

a display module, comprising: a buffer layer, an inner screen and a lens layer;

the inner screen is positioned between the buffer layer and the lens layer;

the edge of the buffer body of the buffer layer extends towards the lens layer to form a first edge protection part, and the first edge protection part wraps at least part of the edge of the inner screen.

According to the technical scheme, the first edge protection part is arranged at the edge of the buffer body of the buffer layer and extends towards the lens layer to wrap at least part of the edge of the inner screen, so that the protection effect on the edge of the inner screen is achieved, the strength performance of the CG/TFT in falling is improved, and the daily requirement of a user is met.

Based on the same inventive concept, the application also provides electronic equipment comprising the display module.

In view of the above-mentioned display module adopted in the electronic device of the present embodiment, the electronic device has corresponding beneficial effects, and the foregoing description may be referred to specifically, and will not be repeated here.

Drawings

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

Fig. 1 is a schematic top view of a display module according to a first embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a display module according to a first embodiment of the application;

fig. 3 is a schematic partial structure of a display module according to a first embodiment of the application;

FIG. 4 is a schematic diagram of a buffer layer according to a first embodiment of the present application;

FIG. 5 is a schematic view showing the structure of a lens layer according to a first embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a bending or stacking structure of a first edge protection portion according to an embodiment of the present application;

fig. 7 is a schematic top view of a display module according to a second embodiment of the application;

fig. 8 is a schematic side view of a display module according to a second embodiment of the application.

In fig. 1 to 4 and 6 to 8, 10 is a buffer layer, 11 is a buffer body, 12 is a first edge protection part, 13 is a rubber surface, 14 is supporting foam, and 15 is double-sided tape;

in fig. 1, 2, 3, 5, 7 and 8, 20 is a lens layer, and 21 is a second edge protection portion;

in fig. 2 and 3, 30 is an OCA layer, 40 is a POL layer, 50 is CG, and 60 is a TFT layer.

Detailed Description

First, the technical terms involved in the scheme are explained as follows:

electronic equipment: basically interpreted as an electrical device consisting of microelectronic devices. The electronic equipment is composed of electronic components such as an integrated circuit, a transistor, an electronic tube and the like, and the equipment which applies electronic technology (including) software to play a role comprises an electronic computer, a robot controlled by the electronic computer, a numerical control or program control system and the like.

And a display module: the module is a generic term for modular components assembled by a liquid crystal display panel and related components such as a driving circuit, a backlight source, an integrated circuit and the like, and is a core component of electronic products such as a mobile phone, a tablet personal computer and the like.

An inner screen: the display module is mainly used for displaying information (such as images and characters) and is different from an external screen which is controlled by touch and matched with hands.

OLED: organic Light-Emitting Diode, also known as Organic laser display, organic Light Emitting semiconductor. An OLED is a current-type organic light emitting device, which is a phenomenon of emitting light by injection and recombination of carriers, and the intensity of the light emission is proportional to the current injected. Under the action of an electric field, holes generated by the anode and electrons generated by the cathode of the OLED move, are respectively injected into the hole transport layer and the electron transport layer, and migrate to the light emitting layer. When the two meet at the light emitting layer, an energy exciton is generated, thereby exciting the light emitting molecule to finally generate visible light.

And (3) Lens: i.e. a lens, is an optical element made of transparent material (e.g. glass, crystal, etc.). The lens is a refractive mirror whose refractive surface is a transparent body of two spherical surfaces (a part of a spherical surface) or one spherical surface (a part of a spherical surface) and one plane.

OCA: optically Clear Adhesive, a special adhesive for bonding transparent optical elements (such as lenses, etc.). The adhesive is required to be colorless and transparent, has light transmittance of more than 95%, good cementing strength, can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage and the like.

And (3) POL: the English abbreviation of Polarizer is called polar. The imaging of the liquid crystal display is dependent on polarized light, and all liquid crystals are provided with a front polarizing plate and a rear polarizing plate which are tightly attached to liquid crystal glass to form a liquid crystal plate with the total thickness of about 1 mm.

CG: and the glass cover plate is used for protecting display components (namely TFTs) of the inner screen.

TFT: all Thin Film Transistor (thin film field effect transistor) is that each liquid crystal pixel point on the liquid crystal display is driven by the thin film transistor integrated behind it, so that high-speed, high-brightness and high-contrast display screen information can be achieved, the TFT belongs to an active matrix liquid crystal display, and the TFT-LCD (thin film transistor liquid crystal display) is one of the majority of liquid crystal displays.

COF: chip On Flex, or, chip On Film, commonly referred to as flip Chip Film, is a die-attach technology for attaching Integrated Circuits (ICs) to flexible circuit boards.

TP: the Touch Pad Touch screen is also called a Touch panel, and is an induction type liquid crystal display device capable of receiving input signals such as a contact.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The display module provided by the embodiment of the application comprises: buffer layer 10, inner screen and lens layer 20, the structure of which can be seen with reference to fig. 2 and 3;

wherein the inner screen is located between the buffer layer 10 (left side of fig. 2) and the lens layer 20 (right side of fig. 2), as shown in the middle position in the left-right direction in fig. 2; the inner screen is a part of the display module, which is different from the outer screen and is mainly used for displaying information (such as images and characters);

the edge of the buffer body 11 of the buffer layer 10 extends toward the lens layer 20 to form a first edge protection portion 12, and the structure thereof can be shown with reference to fig. 1 to 4, 7 and 8, and the first edge protection portion 12 wraps at least part of the edge of the inner screen. It will be appreciated that the inner screen is generally a plate-like structure (planar or curved) and is generally square, circular or otherwise approximately shaped, and that the edges thereof refer to the extreme positions of the inner screen extending from the center to the periphery, such as the circular outer peripheral surface. As can be seen from the above technical solution, in the display module provided by the embodiment of the present application, the first edge protection portion 12 is disposed at the edge of the buffer body 11, where the first edge protection portion 12 extends toward the lens layer 20, wraps at least part of the edge of the inner screen, avoids stress concentration at the protruding shape, and plays a role in protecting the edge of the inner screen from being unloaded, so as to improve the strength performance of the inner screen (such as CG/TFT) in falling, and satisfy the daily requirements of users. The scheme can be applied to electronic equipment such as OLED products and the like.

Preferably, the edge of the inner screen comprises a plurality of edges and corners, the corner connection points of the inner screen are wrapped by a plurality of first edge protection parts 12, the structure of the edge protection parts can be shown by referring to the first embodiment of fig. 1-4, the corner connection points of the edge of the inner screen are in a shape protruding stress concentration, and the force unloading effect of the first edge protection parts 12 is obvious in a targeted arrangement; it will be appreciated that in a one-point edge-corner-edge structure, two first edge protection portions 12 are provided to protect corner connection points on both sides of the corner, respectively, and the structure thereof can be shown with reference to fig. 1;

and/or, the area of the first edge protection part 12 is increased, so that the optimization of the scheme can be obtained, the initial stress is given to be F, the pressure P=F/S, S is the contact area, and the buffer performance is utilized to the maximum extent as the P value is reduced along with the increase of the first edge protection part 12; the corresponding technical scheme is as follows: the edges of the inner screen comprise a plurality of corners, and the corners of the inner screen are wrapped by a plurality of first edge protection parts 12, so that the structure of the inner screen can be shown by referring to the second embodiment of fig. 7 and 8, the top corners of the inner screen are completely wrapped, the protection is more comprehensive, the contact area during falling is increased, and the stress is shared; of course, if the inner panel has no corner structure, such as a circular shape, the first edge protection portion 12 wraps around a certain curvature of the inner panel.

In the first specific embodiment provided by the scheme, the edge of the inner screen comprises four edges and four corners, each corner and the edges on two sides are provided with two corner connection points, as shown in fig. 1, the four edges are respectively positioned on the upper side, the lower side, the left side and the right side, and the four corners are respectively positioned on the upper left, the lower left, the upper right and the lower right; the eight first edge protection portions 12 are respectively corresponding to eight corner connection points of the wrapping inner screen one by one, and the structure of the eight first edge protection portions can be shown with reference to fig. 1 and 4, and correspond to square products, such as wearing equipment, mobile phones and the like.

In the second specific embodiment provided by the scheme, the edge of the inner screen comprises a plurality of arc angles, the arc angles of the inner screen are wrapped by a plurality of first edge protection parts 12, the radian of the first edge protection parts 12 is not smaller than that of the arc angles, so that the arc angles of the inner screen are completely wrapped, the protection is more comprehensive, the structure can be shown by referring to fig. 7, and four vertex angles are specifically corresponding to the four vertex angles, and are respectively positioned at the upper left, the lower left, the upper right and the lower right.

Preferably, the curvature of the first edge protection portion 12 is not limited to one instance, and preferably ranges from 90 ° ± 30 ° 60 ° -120 °, to achieve sufficient coverage. Specifically, the first edge protection portion 12 may have an arc of 60 ° -120 °, 70 ° -110 °, or 80 ° -100 ° to meet different internal screen structural characteristics. Fig. 7 shows an example of a 90 ° arc for a conventional cut, corresponding to a vertical edge configuration.

Further, the first edge protecting part 12 is adhered to the lens layer 20 to improve the firmness and reliability of the inner screen wrapping, and the structure thereof can be shown with reference to fig. 2 and 3. The bonding may be achieved by an adhesive agent that is applied to one side of the first edge protection portion 12, and the specific implementation is not limited herein, and will not be described again.

Specifically, the first edge protection portion 12 wraps part of the edge of the inner screen, and the other edges of the inner screen are provided with connecting mechanisms. As shown in fig. 1 and 7, i.e. the inner screen is not fully sealed by the first edge protection 12, the COF, TP and the connector position openings remain for normal connection, and may specifically be drawn from the straight edge.

The present solution provides two ways of machining the first edge protector 12. First, as shown in fig. 6, the first edge protection portion 12 is formed by protruding and bending the edge of the buffer body 11, and is naturally mounted on a protection target (i.e., the inner panel or the second edge protection portion 21), and has the adhesive surface 13 on one side. The buffer layer 10 can be specifically foam, can obtain an accurate shape by cutting, is bent to be bonded with the lens20, has simple process and convenient operation, is suitable for foam with common thickness, and can be specifically 0.1-0.13mm.

The second type is shown in fig. 6, in which the first edge protection portion 12 is stacked with the buffer body 11. Specifically, foam with a certain compression amount is combined with foam on the back to form a sandwich structure, and the ALS device is similar to that of the foam, so that the foam is particularly suitable for foam with the thickness of 0.7-0.9. Specifically, a stacking structure of a common foam such as the buffer body 11 and the supporting foam 14 may be adopted, and double faced adhesive tapes 15 are respectively disposed on two sides of the supporting foam 14. It will be appreciated that the length of the first edge protection 12 (here the thickness of the stack of support foam 14) should be comparable to the thickness of the inner screen glass to be protected.

Preferably, the lens layer 20 extends toward the buffer layer 10 near the inner screen to form a second edge protection part 21, and the inner side of the second edge protection part 21 wraps at least part of the edge of the inner screen, and the structure can be shown with reference to fig. 2, 3 and 5. The second edge protection portion 21 avoids stress concentration at the protruding shape of the inner screen, and plays a role in protecting the inner screen edge from unloading force, so that the strength performance of the inner screen (such as CG/TFT) in falling is improved, and the daily requirement of a user is met.

Further, the edge of the inner screen includes a plurality of arc angles, the arc angles of the inner screen are wrapped by a plurality of second edge protection parts 21, and the radian of the second edge protection parts 21 is not smaller than the radian of the arc angles. The structure of which can be seen with reference to fig. 1 and 5, here specifically four corners. In this embodiment, the first edge protection portion 12 and the second edge protection portion 21 are correspondingly disposed to provide dual protection for the inner screen.

Specifically, the curvature of the second edge protection portion 21 is not limited to one case, and is preferably in the range of 90 ° ± 30 ° to achieve a sufficiently large coverage. Specifically, the radian of the second edge protection portion 21 may be 60 ° -120 °, 70 ° -110 °, or 80 ° -100 °, so as to satisfy different internal screen structural characteristics. Fig. 5 and 7 are both current conventional cutting cases, and an example of 90 ° radian corresponds to the case where two sides of the corner structure are vertical.

In this embodiment, the first edge protection portion 12 is bonded to the outer side of the second edge protection portion 21, so that the first edge protection portion 12 serves as a primary protection and the second edge protection portion 21 serves as a secondary protection during falling, and a more sufficient protection effect can be achieved, and the structure thereof can be shown in fig. 1, 2, 3, 7 and 8.

Preferably, the second edge protecting part 21 and the lens layer 20 are of an integral structure, which is convenient to process and assemble, and the structure thereof can be shown with reference to fig. 2, 3 and 5. The material of the lens layer 20 is not particularly limited, and will not be described.

Specifically, the inner screen includes: the TFT layer 60, the buffer body 11 is bonded to the TFT layer 60, and its structure may be as shown with reference to fig. 2 and 3 to protect the rear surface of the inner screen. The bonding may be achieved by an adhesive agent compounded on one side of the buffer body 11, and the specific implementation is not limited herein, so that description will not be given.

Further, the inner screen further includes: the CG layer 50, the POL layer 40 and the OCA layer 30 are sequentially located between the TFT layer 60 and the lens layer 20, and the structures thereof can be shown with reference to fig. 2 and 3, and the aforementioned first edge protection portion 12 and second edge protection portion 21 play a role of shock-absorbing and buffering for these internal screen components. The matching relationship between the components of the inner screen is the prior art, and is not described herein.

The present solution is further described in connection with the following complete examples:

the display module provided by the application is a module design capable of improving the module strength, and can be particularly applied to OLED module structural design; adding a protruding edge (namely the second edge protection part 21) on the Lens ink surface to protect the CG/TFT vertex angle; the protruding hanging lugs (namely the first edge protection part 12) are added to the foam (namely the buffer layer 10), the foam is bonded with the TFT and the LENS screen at the same time, so that the shockproof buffer effect is achieved, the cfog is wrapped in the LENS and the foam, and the CG/TFT vertex angle is prevented from being stressed first; the inner screen is not in a full sealing state, and still maintains COF, TP and the position openings of the connector for normal connection;

two modes of realizing bonding of foam and lens: (1) the sandwich foam structure at the ALS device can realize the stacking thickness of 0.7-0.9 mm, and foam with a certain compression amount is combined with foam on the back; (2) or common thickness foam (0.1-0.13 mm) can be bonded with the lens by cutting.

In summary, the problem that stress concentration at the protruding shape is solved, and the force of foam is limited to unloading is solved, so that the strength performance of CG/TFT in falling is improved.

The embodiment of the application also provides electronic equipment, which comprises the display module. In view of the above-mentioned display module adopted in the electronic device of the present embodiment, the electronic device has corresponding beneficial effects, and the foregoing description may be referred to specifically, and will not be repeated here.

Specifically, the electronic device is a wearable device or a mobile phone.

In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display module, comprising: a buffer layer (10), an inner screen and a lens layer (20);

the inner screen is positioned between the buffer layer (10) and the lens layer (20), and the buffer layer (10) is foam;

the edge of the buffer body (11) of the buffer layer (10) extends towards the lens layer (20) to form a first edge protection part (12), and the first edge protection part (12) wraps at least part of the edge of the inner screen;

the lens layer (20) extends towards the buffer layer (10) close to the inner screen to form a second edge protection part (21), and the inner side of the second edge protection part (21) wraps at least part of the edge of the inner screen;

the first edge protection portion (12) is bonded to the outside of the second edge protection portion (21).

2. The display module according to claim 1, wherein the edges of the inner screen comprise a plurality of edges and corners, and a plurality of the first edge protection parts (12) wrap corner connection points of the inner screen; and/or the number of the groups of groups,

the edges of the inner screen comprise a plurality of corners, and the corners of the inner screen are wrapped by a plurality of first edge protection parts (12).

3. The display module according to claim 1, wherein the edges of the inner screen comprise four sides and four corners, each corner and the sides of both sides have two corner connection points, and eight first edge protection parts (12) wrap the eight corner connection points of the inner screen in a one-to-one correspondence.

4. The display module according to claim 1, wherein the edge of the inner screen comprises a plurality of arc angles, the arc angles of the inner screen are wrapped by a plurality of first edge protection parts (12), and the radian of the first edge protection parts (12) is not smaller than the radian of the arc angles.

5. A display module according to claim 4, wherein the arc of the first edge protection portion (12) is 60 ° -120 °.

6. The display module of claim 1, wherein the first edge protection portion (12) is bonded to the lens layer (20).

7. The display module assembly according to claim 1, wherein the first edge protection portion (12) wraps a portion of the edge of the inner screen, and the other edge of the inner screen is provided with a connection mechanism.

8. The display module according to claim 1, wherein the first edge protection portion (12) is formed by bending an edge of the buffer body (11), and has a glue surface (13) on one side.

9. The display module assembly according to claim 1, wherein the first edge protection portion (12) is stacked with the buffer body (11).

10. The display module according to claim 9, wherein the first edge protection portion (12) adopts a stacked structure of the buffer body (11) and supporting foam (14), and double faced adhesive tape (15) is respectively disposed on two sides of the supporting foam (14).

11. The display module according to claim 1, wherein the edge of the inner screen comprises a plurality of arc angles, the arc angles of the inner screen are wrapped by a plurality of second edge protection parts (21), and the radian of the second edge protection parts (21) is not smaller than the radian of the arc angles.

12. A display module according to claim 11, wherein the curvature of the second edge protection portion (21) is 60 ° -120 °.

13. The display module according to claim 1, characterized in that the second edge protection (21) and the lens layer (20) are of unitary construction.

14. The display module of claim 1, wherein the inner screen comprises: -a TFT layer (60), said buffer body (11) being bonded to said TFT layer (60).

15. The display module of claim 14, wherein the inner screen further comprises: CG layer (50), POL layer (40) and OCA layer (30), CG layer (50), POL layer (40) and OCA layer (30) are located in order between TFT layer (60) and lens layer (20).

16. An electronic device comprising a display module according to any one of claims 1-15.

17. The electronic device of claim 16, wherein the electronic device is a wearable device or a cell phone.