Display-module assembly and electronic device

A display-module assembly (100) and an electronic device (1000) are described. The display-module assembly (100) includes: a cover plate (10) including a window portion (101) and a non-window portion (102) surrounding the window portion (101); a display module (30) disposed at the inner side of the cover plate (10); a bonding layer (20) including a first bonding portion (201) and a second bonding portions (202). The first bonding portion (201) is adhered between the window portion (101) and the display module (30). An ink layer (40) is provided on the surface of the non-window portion (102) facing the display module (30). The second bonding portion (202) is adhered between the ink layer (40) and the display module (30).

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a U.S. National Phase Entry of International Application No. PCT/CN2020/082397 having an international filing date of Mar. 31, 2020, which is based on and claims priority to the Chinese patent application No.201910430561.8, filed on May 22, 2019. The contents of the above-identified applications are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

The present application relates to the technical field of OLED (Organic Light-Emitting Diode) display, in particular to a display-module assembly and an electronic device.

BACKGROUND

In the related art, an ink layer is generally provided on the cover plate of AMOLED (Active-Matrix Organic Light-Emitting Diode) display-module assembly. The cover plate and the display module of the display-module assembly are bonded by solid OCA glue in a vacuum, and then deaerated by the vacuum. However, the provision of the ink layer causes a level difference. The ability of OCA to compensate the level difference is only 15%-30% of its own thickness, which tends to cause bubble defects in the bonding, resulting in product rejection.

SUMMARY

The present application intents to solve at least one of the technical problems existing in the prior art. Therefore, an object of this present application is to provide a display-module assembly which can substantially eliminate the generation of bubbles and avoid the bubble defects.

The present application also provides an electronic device which includes the display-module assembly mentioned above.

The display-module assembly according to embodiments of the present application includes a cover plate, wherein the cover plate includes a window portion and a non-window portion surrounding the window portion; a display module disposed at the inner side of the cover plate; a bonding layer including a first bonding portion and a second bonding portion, the first bonding portion being a first OCA (optical adhesive) layer and adhered between the window portion and the display module; wherein an ink layer is provided on the surface of the non-window portion facing the display module, and the second bonding portion is an OCR (liquid adhesive) layer, which is adhered between the ink layer and the display module; or, wherein the second bonding portion is adhered between the non-window portion and the display module, and the second bonding portion includes a second OCA (optical adhesive) layer and an ink layer disposed within the second OCA (optical adhesive) layer.

The display-module assembly according to embodiments of the present application may substantially eliminate the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly.

According to some embodiments of the present application, the second OCA (optical adhesive) layer includes a first adhesive sub-layer and a second adhesive sub-layer spaced apart along the offsetting direction between the cover plate and the display module, and the ink layer is sandwiched between the first adhesive sub-layer and the second adhesive sub-layer.

According to some embodiments of the present application, the ink layer, the second OCA (optical adhesive) layer and the first OCA (optical adhesive) layer are formed integrally.

According to some embodiments of the present application, in the direction away from the center of the window portion, the non-window portion bends in an arc shape toward the display module.

According to some embodiments of the present application, the optical refractive, light transmittance and thermal expansion coefficient of the OCR (liquid adhesive) layer are the same as those of the first OCA (optical adhesive) layer.

The electronic device according to embodiments of the present application includes a housing, one side of which is open; and the display-module assembly described above is disposed on the open side of the housing.

With the display-module assembly described above, the electronic device according to embodiments of the present application may substantially eliminate the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly.

According to some embodiments of the present application, the cover plate further includes an installing portion which surrounds the non-window portion peripherally. A step portion is formed on the end face of the open end of the housing, and the installing portion abuts against the step portion.

According to some embodiments of the present application, the step portion and the installing portion are connected by a glue layer.

According to some embodiments of the present application, t the glue layer has the same color as the ink layer.

According to some embodiments of the present application, the electronic device is a mobile phone.

Additional aspects and advantages of the present application will be partially shown or become apparent in the following description, or will be learned from practice of the present application.

DETAILED DESCRIPTION

Descriptions will now be made in detail to embodiments, illustrations of which are shown in the accompanying drawings. The same or similar, or functionally same or similar elements are indicated by like reference numerals throughout the descriptions. The embodiments described herein with reference to the accompanying drawings are exemplary, used for explaining the present disclosure only, and should not be construed to limit the present application.

A display-module assembly100according to embodiments of the present application will be described below with reference toFIGS.1-6. The display-module assembly100may be applied in an electronic device1000, such as a mobile phone, to perform functions such as display for the electronic device1000.

As shown inFIGS.1-6, the display-module assembly100according to the embodiments of the present application may include a cover plate10, a display module30and a bonding layer20.

The cover plate10includes a window portion101and a non-window portion102surrounding the window portion101peripherally. The display module30is disposed at the inner side of the cover plate10and aligned with the window portion101and the non-window portion102respectively. It should be explained that when the display module30is applied on the electronic device1000, “inner side” refers to the side close to the interior of the electronic device1000.

The bonding layer20is disposed between the display module30and the cover plate10, so that the display module30and the cover plate10are assembled together by the bonding layer20.

Specifically, as shown inFIGS.3and6, the bonding layer20includes a first bonding portion201and a second bonding portion202. The first bonding portion201is a first OCA (optical adhesive) layer. As shown inFIG.1, the first bonding portion201is adhered between the window portion101and the display module30. As a result, the bonding between the window portion101and the display module30is achieved by applying the first portion201, furthermore, because the first OCA (optical adhesive) is solid, the bonding process of bonding the window portion101and the display module30is simplified, the problem of glue overflow is avoid, and the reliability of the bond is improved. In addition, the first OCA (optical adhesive) may also serves as a support in the bonding process involving OCR (liquid adhesive) layer described below, so as to ensure the shape stability of the product during the process thereby ensuring successful bonding.

In the related processes, an ink layer40is generally provided on the cover plate10of display-module assembly100. The cover plate10and the display module30of the display-module assembly100are bonded by solid OCA in a vacuum, and then deaerated by the vacuum. The inventor found in practical research that the provision of the ink layer40causes a level difference. Because the ability of OCA to compensate the level difference is only 15%˜30% of its own thickness, which tends to cause bubble defects in the bonding, resulting in product rejection.

In some optional embodiments of this present application, as shown inFIG.1andFIG.2, the surface of the non-window portion102facing the display module30is provided with an ink layer40. The second bonding portion202is an OCR (liquid adhesive) layer, which is adhered between the ink layer40and the display module30. That is, while the surface of the non-window portion102facing the display module30is provided with an ink layer40, the second bonding portion202sandwiched between the ink layer40and the display module30is an OCR (liquid adhesive) layer. It can be understood that under certain temperature changes, the status of the OCR (liquid adhesive) layer will be transformed between liquid and solid. Since the OCR (liquid adhesive) layer is liquid during the process of bonding the non-window portion102and the display module30, the liquid OCR (liquid adhesive) layer is conducive to filling and compensating against the ink, ensuring improved filling capacity and compensating capacity for level difference caused by the ink, without affecting the process stability, so that it is possible to substantially eliminate the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly100.

Optionally, the optical refractive, light transmittance and thermal expansion coefficient of the OCR (liquid adhesive) layer are the same as those of the first OCA (optical adhesive) layer. This is helpful to ensure the reliability of display-module assembly100.

In other optional embodiments of the present application, as shown inFIGS.4-6, the second bonding portion202is adhered between the non-window portion102and the display module30. The second bonding portion202includes a second OCA (optical adhesive) layer2021and an ink layer40disposed within the second OCA (optical adhesive) layer2021. That is, instead of providing the ink layer40on the cover plate10as the prior art, the ink layer40is disposed within the second OCA (optical adhesive) layer2021, so that the second bonding portion202and the first bonding portion201with substantially the same thickness can be used for bonding when the cover plate10and the display module30are adhered by the bonding layer20, which is helpful to a better fit, thus the bonding effect can be improved. By doing so, the problem of the level difference caused by the ink layer40in the related art is solved, thereby substantially eliminating the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, the process stability is not affected, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly100. Moreover, disposing the ink layer40within the second OCA (optical adhesive) layer2021is also helpful to ensure the bonding ability of the second bonding portion202, thereby the reliability of bonding the second bonding portion202respectively with the non-window portion102and the display module30is improved.

The display-module assembly100according to the embodiments of the present application may substantially eliminate the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly100.

In some embodiments of this present application, as shown inFIG.5andFIG.6, the second OCA (optical adhesive) layer2021includes a first adhesive sub-layer20211and a second adhesive sub-layer20212spaced apart along the offsetting direction between the cover plate10and the display module30. That is, in the offsetting direction between the cover plate10and the display module30, the first adhesive sub-layer20211and the adhesive second sub-layer20212are spaced apart and the ink layer40is sandwiched between the first adhesive sub-layer20211and the second adhesive sub-layer20212. Specifically, for example, during the preparation of the second bonding portion202, a layer of first adhesive sub-layer20211may be laid first, then a layer of ink layer40may be printed on the first adhesive sub-layer20211, and finally the second adhesive sub-layer20212may be laid on the ink layer40, thereby the manufacture of the second bonding portion202is completed.

Therefore, by sandwiching the ink layer40between the first adhesive sub-layer20211and the second adhesive sub-layer20212, specifically, for example, as shown in FIGS.5and6, with the first adhesive sub-layer20211between the display module30and the ink layer40and the second adhesive sub-layer20212between the non-window portion102and the ink layer40, it is helpful to ensure the bonding ability of the second bonding portion202, thereby the non-window portion102and the display module30are reliably bonded together by the second bonding portion202, improving the reliability of the installation.

In some embodiments of the present application, as shown inFIG.6, the ink layer40, the second OCA (optical adhesive) layer2021and the first OCA (optical adhesive) layer are formed integrally, i.e. the bonding layer20is formed as one piece. For example, during the actual preparation of the bonding layer20, a first adhesive layer, including the first adhesive sub-layer20211and a first window adhesive layer corresponding to the window portion101, may be prepared first, then a layer of ink layer40may be printed on the first adhesive sub-layer20211, and then a second adhesive layer, including the second adhesive sub-layer20212and a second window adhesive layer corresponding to the window portion101, is prepared. It can be understood that, the second window adhesive layer may be relatively thicker, so as to fill the level difference caused by the ink layer40. Thus, the level difference caused by the ink layer40is compensated inside the bonding layer20, which is simple and reliable, and is helpful to ensure the bonding ability of the bonding layer20.

In some optional embodiments of the present application, in the direction away from the center of the window portion101, the non-window portion102bends in an arc shape toward the display module30. Therefore, the appearance of the arc-shaped display module assembly100can be achieved, which is helpful to improve the aesthetics of the display-module assembly100.

Optionally, the cover plate10is a glass cover plate10, for lower cost.

The specific structures of two embodiments of this present application will be described in detail below with reference toFIGS.1-6.

As shown inFIGS.1-3, the display-module assembly100according to the embodiments of the present application may include a cover plate10, a display module30and a bonding layer20.

Specifically, the cover plate10includes a window portion101and a non-window portion102surrounding the window portion101peripherally. The display module30is disposed at the inner side of the cover plate10and aligned with the window portion101and the non-window portion102respectively. The window portion101has a planar form, and in the direction away from the center of the window portion101, the non-window portion102bends into an arc shape toward the display module30.

Specifically, the bonding layer20includes a first bonding portion201and a second bonding portion202. The first bonding portion201is a first OCA (optical adhesive) layer, and the first bonding portion201is adhered between the window portion101and the display module30, as shown inFIG.1andFIG.2. The surface of the non-window portion102facing the display module30is provided with an ink layer40. The second bonding portion202is an OCR (liquid adhesive) layer, which is adhered between the ink layer40and the display module30. That is, while the surface of the non-window portion102facing the display module30is provided with an ink layer40, the second bonding portion202sandwiched between the ink layer40and the display module30is an OCR (liquid adhesive) layer. It can be understood that under certain temperature changes, the status of the OCR (liquid adhesive) layer will be transformed between liquid and solid. Since the OCR (liquid adhesive) layer is liquid during the process of bonding the non-window portion102and the display module30, the liquid OCR (liquid adhesive) layer is conducive to filling and compensating against the ink, ensuring improved filling capacity and compensating capacity for level difference caused by the ink, without affecting the process stability, so that it is possible to substantially eliminate the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly100.

Optionally, the optical refractive, light transmittance and thermal expansion coefficient of the OCR (liquid adhesive) layer are the same as those of the first OCA (optical adhesive) layer. This is helpful to ensure the display reliability of the display module30.

As shown inFIGS.4-6, the display-module assembly100according to the embodiments of the present application includes a cover plate10, a display module30and a bonding layer20.

Specifically, the cover plate10includes a window portion101and a non-window portion102surrounding the window portion101peripherally. The display module30is disposed at the inner side of the cover plate10and aligned with the window portion101and the non-window portion102respectively. The window portion101has a planar form, and in the direction away from the center of the window portion101, the non-window portion102bends into an arc shape toward the display module30.

Specifically, the bonding layer20includes a first bonding portion201and a second bonding portion202. The first bonding portion201is a first OCA (optical adhesive) layer. The first bonding portion201is adhered between the window portion101and the display module30. As a result, the bonding between the window portion101and the display module30is achieved by applying the first portion201, furthermore, because the first OCA (optical adhesive) is solid, the bonding process of bonding the window portion101and the display module30is simplified, the problem of glue overflow is avoid, and the reliability of bonding is improved.

The second bonding portion202is adhered between the non-window portion102and the display module30. The second bonding portion202includes a second OCA (optical adhesive) layer2021and an ink layer40disposed within the second OCA (optical adhesive) layer2021. That is, instead of providing the ink layer40on the cover plate10as the prior art, the ink layer40is disposed within the second OCA (optical adhesive) layer2021, so that the second bonding portion202and the first bonding portion201with substantially the same thickness may be used for bonding when the cover plate10and the display module30are adhered by the bonding layer20, which is helpful to a better fit, thus the bonding effect can be improved. By doing so, the problem of the level difference caused by the ink layer40in the related art is solved, thereby substantially eliminating the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, the process stability is not affected, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly100.

Specifically, as shown inFIGS.5and6, the second OCA (optical adhesive) includes a first adhesive sub-layer20211and a second adhesive sub-layer20212spaced apart along the offsetting direction between the cover plate10and the display module30. The ink layer40is sandwiched between the first adhesive sub-layer20211and the second adhesive sub-layer20212. The ink layer40, the second OCA (optical adhesive) layer2021and the first OCA (optical adhesive) layer are formed integrally, i.e. the bonding layer20is formed as one piece. During the actual preparation of the bonding layer20, a first adhesive layer, including the first adhesive sub-layer20211and a first window adhesive layer corresponding to the window portion101, may be prepared first, then a layer of ink layer40may be printed on the first adhesive sub-layer20211, and then a second adhesive layer, including the second adhesive sub-layer20212and a second window adhesive layer corresponding to the window portion101, is prepared. It can be understood that, the second window adhesive layer may be relatively thicker, so as to fill the level difference caused by the ink layer40. Thus, the level difference caused by the ink layer40is compensated inside the bonding layer20, which is simple and reliable, and is helpful to ensure the bonding ability of the bonding layer20.

An electronic device1000according to embodiments of the present application is described below.

As shown inFIG.7, an electronic device1000according to embodiments of the present application may include the display-module assembly100described above; and a housing200, one side of which is open. The display-module assembly100is disposed on the open side of the housing200.

With the display-module assembly100, the electronic device1000according to the embodiments of the present application is able to substantially solve the problem of bubble defects generated in the bonding process in the prior art due to the poor ability of OCA to fill the level difference, the product rejection is avoided, and meanwhile, it is helpful to achieve a thinner design of the display-module assembly100.

It can be understood that the display module30may include a display screen, a touch screen, etc. The specific structure of the display module30is well known to those skilled in the art and will not be described in detail here.

In some optional embodiments of the present application, as shown inFIG.1,FIG.4andFIG.7, the cover plate10further includes an installing portion103which surrounds the non-window portion102peripherally. A step portion2001is formed on the end face of the open end of the housing200, and the installing portion103abuts against the step portion2001, thereby facilitating the installation of the display-module assembly100.

Optionally, the step portion2001and the installing portion103are connected by the glue layer (sealant layer)300. For example, the step portion2001may be connected with the installing portion103by a glue dispensing process.

Optionally, the color of the glue layer300is the same as that of the ink layer40. Specifically, the glue layer300and the ink layer40are both black. Therefore, it may achieve a uniform black appearance of the installing portion103and the non-window portion102, which is helpful to improve the aesthetics of the electronic device1000and avoid color inconsistency.

In the description of the specification, references like “an embodiment”, “some embodiments”, “schematic embodiment”, “an example”, “a specific example” or “some examples” intend to indicate that specific features, structures, materials, or characteristics described in connection with the embodiment or example is associated with at least one embodiment or example of the present application. In this description, general reference of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a proper way.

Although the specific embodiments of the present application have been illustrated and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and concept of the present application. The scope of the present application is defined by the claims and their equivalents.