CN115132089A - Display module and display device - Google Patents
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- CN115132089A CN115132089A CN202210841546.4A CN202210841546A CN115132089A CN 115132089 A CN115132089 A CN 115132089A CN 202210841546 A CN202210841546 A CN 202210841546A CN 115132089 A CN115132089 A CN 115132089A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model provides a display module and a display device, belonging to the technical field of display, and disclosing a display module, which comprises a support structure, a display panel and a first bonding layer for bonding the display panel and the support structure; the display module is provided with a bending area; the display module further comprises a stabilizing structure located on the end face of the first bonding layer, and the stabilizing structure at least covers a connecting interface of the display panel and the first bonding layer in the bending area.
Description
Technical Field
The utility model belongs to the technical field of show, concretely relates to display module assembly and display device.
Background
With the development of the Display industry, the Display devices commonly used today in Organic Light Emitting Diode (OLED) Display devices are receiving great attention and development in the Display technology field. The OLED is applied to the flexible display device, has wide development prospects in folding, expanding, narrow frame and the like, and therefore becomes a key point for attention and development of various large-screen manufacturers and mobile phone manufacturers. The display screen switching device has the advantages that the display screen can be expanded, so that the display switching between a small screen and a large screen is realized, and the display requirements of consumers on different sizes are met. Furthermore, referring to the requirements of a full-screen and beautiful appearance of a flat mobile phone, a foldable and expandable screen becomes the latest research focus.
Collapsible, expanded screen, narrow frame screen's display module assembly design structure is with pressure sensitive adhesive bonding to bearing structure for display panel, and bearing structure passes through the punching press and forms the bending zone and keep the radian, but the thick great of display module assembly is difficult to keep the state of buckling, has the straight trend of reply in the bending zone. Therefore, the display module and the supporting structure are easy to be stripped in the bending area, and further the partial production process and the product reliability of the flexible display device are influenced.
Disclosure of Invention
The present invention is directed to at least one of the technical problems of the prior art, and provides a display module and a display device.
In a first aspect, an embodiment of the present disclosure provides a display module, which includes a support structure, a display panel, and a first adhesive layer for attaching the display panel to the support structure; the display module is provided with a bending area;
the display module further comprises a stabilizing structure located on the end face of the first bonding layer, and the stabilizing structure at least covers a connecting interface of the display panel and the first bonding layer in the bending area.
The stable structure covers the end face of the display panel in the bending area and the end face of the first bonding layer in the bending area.
The stable structure covers the end face of the display panel in the bending area, the end face of the first bonding layer in the bending area, and the connecting interface of the first bonding layer and the supporting structure in the bending area.
The stable structure covers the end face of the display panel in the bending area, the end face of the first bonding layer in the bending area and the end face of the support structure in the bending area.
The display panel comprises a laminated structure and cover plate glass which are arranged in sequence away from the supporting structure; the orthographic projection of the cover glass on the supporting structure is superposed with the supporting structure; the orthographic projection area of the cover glass on the supporting structure is larger than that of the laminated structure on the supporting structure.
The laminated structure comprises a protective layer, a display layer, a polarizing layer and an adhesive layer; at least one of the protective layer, the polarizing layer and the adhesive layer is positioned in the orthographic projection area of the supporting structure and is larger than that of the display layer.
The display module further comprises a flat area; the stabilization structure comprises a first sub-stabilization structure and a second sub-stabilization structure;
the first sub-stable structure covers the connection interface of the display panel and the first bonding layer in the bending area;
the second sub-stabilizing structure covers a connection interface of the display panel and the first adhesive layer in the flat region.
Wherein the material of the stable structure positioned in the bending area is different from that of the stable structure positioned in the straight area.
Wherein, the material of the stable structure is pressure-sensitive adhesive.
Wherein, the pressure-sensitive adhesive is made of any one of organic glass, synthetic rubber, synthetic resin, epoxy resin and organic silicon.
Wherein the elastic modulus of the first sub-stabilization structure is smaller than the elastic modulus of the second sub-stabilization structure.
Wherein, the material of first sub-stable structure is organic glass.
Wherein the material of the second sub-stabilization structure is silicone.
The display panel further comprises a display area and a peripheral area; the peripheral area comprises a pad area positioned on one side of the display area and the bending area positioned on one side of the pad area far away from the display area.
In a second aspect, an embodiment of the present disclosure provides a display device, where the display device includes any one of the display modules described above.
Drawings
FIG. 1 is a schematic end view of a display module with a bending region according to the prior art;
FIG. 2 is a schematic diagram of a prior art display panel and support structure being peeled apart;
FIGS. 3a-3d are schematic views of the securing structure in the bending region according to the embodiment of the disclosure;
FIGS. 4a and 4b are schematic views of the stabilizing structure provided in the embodiment of the present disclosure located in the bending region and the flat region;
FIG. 5 is a schematic illustration of the retraction of a stack structure provided in embodiments of the present disclosure;
FIG. 6 is another schematic illustration of the retraction of a lamination provided in an embodiment of the present disclosure;
fig. 7 is a schematic view of a display module according to an embodiment of the disclosure;
fig. 8 is a schematic diagram of a display module provided in an embodiment of the present disclosure after an interposer and a flexible circuit board are folded;
FIG. 9 is a cross-sectional view A-A' of FIG. 8;
wherein the reference numerals are: 10. a support structure; 20. a display panel; 30. a stable structure; 31. a first sub-stabilizing structure; 32. a second sub-stabilizing structure; 40. a first adhesive layer; 50. a display layer; 60. a polarizing layer; 70. a glue joint layer; 80. cover plate glass; 90. a protective layer; q1, display area; q2, peripheral zone, Q3, bending zone; q4, flat area; COF, chip on film adapter board; FPC, flexible printed wiring board.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and the like in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
FIG. 1 is a schematic end view of a display module with a bending region in the prior art; FIG. 2 is a schematic diagram of a prior art display panel and support structure being peeled apart; as shown in fig. 1, in the prior art, a display screen that requires bending of a partial area, such as an expandable screen, a foldable screen, a full-screen, and a narrow-bezel screen, includes a support structure 10 and a display panel 20, and the support structure 10 and the display panel 20 are bonded by a pressure-sensitive adhesive. To bend the display device, the support structure 10 is bent and maintained in a curved shape by stamping, and then the display panel 20 is attached to the support structure 10. The display panel 20 generally includes a cover glass, an Optical Clear Adhesive (OCA), a polarizing layer, a display layer, and a protective layer, and the overall thickness is up to 300um or more. As shown in fig. 2, since the display panel 20 has a large thickness, after only one layer of pressure sensitive adhesive is attached to the support structure 10 with the bending region Q3, the display panel 20 is not easy to be bent, and may be restored to a flat state, so that the display panel 20 and the support structure 10 may be peeled off. Taking a narrow-frame screen as an example, in a manufacturing process of the narrow-frame screen, in order to narrow a screen frame, a Pad area is arranged in a peripheral area of the display panel 20 not used for displaying by using a Pad bundling process, and the Pad area is bent so as to achieve the purpose of reducing the frame width, and if it cannot be ensured that the bent area Q3 can keep bent, is not straight and returns to be flat, the Pad bundling process will be affected. Therefore, the support structure 10 for assisting the display panel 20 to bend and the display panel 20 are adhered and bonded only by a layer of pressure sensitive adhesive, which causes the bending region Q3 of the display module to straighten and return to flat, thereby affecting part of the process for producing the display module with the bending region Q3, or reducing the reliability of the display device.
With the development of display industry, a foldable screen and an expandable screen have wide development prospects, and a full-screen and a narrow-frame screen are increasingly used on products such as mobile phones, tablet computers, notebook computers and various display devices at present. In order to improve the reliability of the above screens and reduce the problems that part of the process of the display device with the bent portion is seriously affected during the production process and the reliability of the final product is reduced, how to firmly attach the display panel 20 to the support structure 10 which is punched and bent is an urgent problem to be solved.
In view of this, the present disclosure provides a display module, which includes a display panel 20 and a supporting structure 10 bonded by a first bonding layer 40, wherein a fixing structure 30 is disposed on an end surface of the display module in order to fix the display panel 20 and the supporting structure 10 at a bent portion and prevent peeling.
The display module according to the embodiments of the present disclosure is described below with reference to the accompanying drawings and specific embodiments.
In a first aspect, an embodiment of the disclosure provides a display module, and fig. 3a to 3d are schematic diagrams illustrating a stable structure located in a bending region in an embodiment of the disclosure; as shown in fig. 3a-3d, the display module of the present disclosure includes a support structure 10 and a display panel 20. The display panel 20 is bonded to the support structure 10 by the first adhesive layer 40 to achieve the attachment of the display panel 20 to the support structure 10. The display module in the disclosure further includes a bending region Q3, because the display module is used for expandable screens, foldable screens, full-screen screens, narrow-frame screens and the like which need to bend partial regions. In order to firmly bond the display panel 20 and the support structure 10 in the bending region Q3 of the display module, a fixing structure 30 is disposed on an end surface of the first adhesive layer 40 of the display module, and the fixing structure 30 at least covers a connection interface between the display panel 20 and the first adhesive layer 40 in the bending region Q3. It can be understood that the peeling of the display panel 20 and the support structure 10 at the bending region Q3 occurs mainly at the portion where the first adhesive layer 40 is adhered to the display panel 20, and therefore the securing structure 30 covers at least the connecting interface between the display panel 20 and the first adhesive layer 40 at the bending region Q3, so as to prevent the display panel 20 from being straightened and the possibility of peeling the display panel 20 and the support structure 10.
In some examples, the securing structure 30 covers the end surface of the display panel 20 at the bending region Q3 and the end surface of the first adhesive layer 40 at the bending region Q3. In this case, compared with the case that the fixing structure 30 is covered on the display panel 20 and the connection interface of the first adhesive layer 40 in the bending region Q3, the coverage of the fixing structure 30 on the end surface of the display module is enlarged, and the display panel 20 is further prevented from being straightened, which may cause the display panel 20 and the support structure 10 to peel off.
In some examples, the securing structure 30 covers the end surface of the display panel 20 in the bending region Q3, the end surface of the first adhesive layer 40 in the bending region Q3, and the connection interface of the first adhesive layer 40 and the support structure 10 in the bending region Q3. In addition to covering the securing structure 30 on the display panel 20 and the first adhesive layer 40, the securing structure 30 is also covered on the connecting interface between the first adhesive layer 40 and the support structure 10 in the bending region Q3, so that the adhesive peeling of the adhesive part between the first adhesive layer 40 and the display panel 20 is prevented, and the adhesive peeling of the adhesive part between the first adhesive layer 40 and the support structure 10 is also prevented, i.e. the possibility that the display panel 20 and the first adhesive layer 40 are peeled off from the support structure 10 as a whole is reduced. In this case, the coverage of the fixing structure 30 on the end surface of the display module is enlarged, and the protection range of the fixing structure 30 on the end surface of the bending region Q3 of the display module is enlarged, so as to prevent the display panel 20 from being peeled off from the support structure 10 due to the straightening of the display panel 20.
In some examples, the securing structure 30 covers the end surface of the display panel 20 at the bending region Q3, the end surface of the first adhesive layer 40 at the bending region Q3, and the end surface of the support structure 10 at the bending region Q3. It can be understood that the whole of the end face of the bending region Q3 of the display module is covered by the securing structure 30, so as to reduce the possibility of the display panel 20 and the supporting structure 10 peeling off to the maximum.
It should be noted that the material of the supporting structure 10 may be a metal material or a composite metal material, such as: stainless steel, the material of the support structure 10 is not further limited in the disclosed embodiment.
In some examples, the material of the stabilization structure 30 is a pressure sensitive adhesive. The pressure-sensitive adhesive is efficient and environment-friendly, has good compatibility and stability, and basically cannot be influenced by the material of a bonded object to achieve the bonding effect. The pressure sensitive adhesive may be any one of organic glass (PMMA), synthetic rubber, synthetic resin, epoxy resin and silicone. It will be appreciated that there are numerous types of pressure sensitive adhesives, and the particular pressure sensitive adhesive may be selected based on the location of the particular bond and the material of the bonded part.
It should be noted that there are many ways for the pressure sensitive adhesive to form the fixing structure 30 on the end surface of the display module with the bending area Q3. For example: the pressure sensitive adhesive is coated or sprayed to the end face of the area of the display module where the stable structure 30 is required to be formed, and then the pressure sensitive adhesive in a liquid form is fixed to the end face of the display module by using an ultraviolet curing or thermosetting manner, so as to form the stable structure 30 for preventing the display panel 20 and the support structure 10 in the bending area Q3 of the display module from being peeled off. The firm structure 30 formed by curing in this way may have an elastic modulus greater than 500Mpa, ensuring sufficient rigidity to prevent the display panel 20 from being straightened and causing the display panel 20 and the support structure 10 to peel apart. In addition to the above-described methods, there may be other processes for forming the securing structure 30 by pressure sensitive adhesive. In the present disclosure, the specific process and manufacturing method of how to form the pressure sensitive adhesive into the stable structure 30 on the end surface of the display module are not further specifically limited.
In some examples, display screens with a bending region Q3, such as foldable screens, expandable screens, full-screen screens, and narrow-bezel screens, have a flat region Q4 for the display function of the display screen. Therefore, the display module further includes a flat area Q4 mainly used for realizing the display function. Figures 4a and 4b are schematic views of the anchoring structures provided in the embodiments of the present disclosure located in the bending region and the flat region; as shown in FIGS. 4a and 4b, the stabilization structure 30 includes a first sub-stabilization structure 31 and a second sub-stabilization structure 32. The first sub-securing structure 31 covers the connection interface of the display panel 20 and the first adhesive layer 40 in the bending region Q3, and the second sub-securing structure 32 covers the connection interface of the display panel 20 and the first adhesive layer 40 in the flat region Q4. By the method, the display panel 20 in the bending area Q3 of the display module is effectively prevented from being straight, the possibility of peeling the display panel 20 and the support structure 10 is reduced, and the whole end face of the display module can be protected. Cover firm structure 30 on the terminal surface that the display module assembly has bending zone Q3 wholly, because firm structure 30 is bigger with the bonding area of the terminal surface of display module assembly, its bonding is more stable. The display panel 20 has a tendency to be straightened at the bending region Q3, and a certain pulling force is generated, and the larger the bonding area between the fixing structure 30 and the end surface of the display module is, the more reliable the display module is, so as to more effectively resist the pulling force generated by the bending portion of the display panel 20 due to the tendency to be straightened. By the above method, the peeling of the display panel 20 and the support structure 10 caused by the straightening of the display panel 20 is further prevented, so that part of the production process is affected or the reliability of the product is reduced.
Further, the first sub-securing structure 31 may cover the end surface of the display panel 20 in the bending region Q3 and the end surface of the first adhesive layer 40 in the bending region Q3, and the second sub-securing structure 32 may cover the end surface of the display panel 20 in the flat region Q4 and the end surface of the first adhesive layer 40 in the flat region Q4; the first sub-securing structure 31 may further cover an end surface of the display panel 20 in the bending region Q3, an end surface of the first adhesive layer 40 in the bending region Q3, and a connection interface between the first adhesive layer 40 and the support structure 10 in the bending region Q3, and the second sub-securing structure 32 may further cover an end surface of the display panel 20 in the flat region Q4, an end surface of the first adhesive layer 40 in the flat region Q4, and a connection interface between the first adhesive layer 40 and the support structure 10 in the flat region Q4. The first sub-securing structure 31 may also cover the end surface of the display panel 20 in the bending region Q3, the end surface of the first adhesive layer 40 in the bending region Q3, and the end surface of the support structure 10 in the bending region Q3, and the second sub-securing structure 32 may also cover the end surface of the display panel 20 in the flat region Q4, the end surface of the first adhesive layer 40 in the flat region Q4, and the end surface of the support structure 10 in the flat region Q4. Through the methods, the possibility that the display panel 20 of the display module is straightened in the bending area Q3 to cause the display panel 20 and the support structure 10 to be peeled off can be reduced to the greatest extent, and the protection can be provided for the end face of the display module, so that the reliability of the product is improved.
In some examples, in order to simplify the manufacturing process flow, the materials of the first and second sub-stabilization structures 31 and 32 are the same. The first and second sub-stabilization structures 31 and 32 may be any type of pressure sensitive adhesive material. In the manufacturing process, the pressure sensitive adhesive material is coated or sprayed on the whole end face of the display module with the bending area Q3, and the pressure sensitive adhesive is cured by ultraviolet rays or heat to form the stable structure 30. It is understood that other processes may be used to integrally provide the securing structure 30 on the end surface of the display module with the bending region Q3, and the disclosure does not further limit the specific processes.
Further, the fixing structures 30 may be disposed on four end surfaces of the display module, i.e., two end surfaces without the bending region Q3 and two end surfaces with the bending region Q3. By the method, the stable structure 30 can play a role in preventing the display panel 20 from being straightened in the bending area Q3, so that the display panel 20 and the support structure 10 are separated, and meanwhile, the peripheral end faces of the display module can be protected, so that the finally produced display device has higher reliability.
In some examples, the materials of the first and second sub-stabilization structures 31 and 32 are different. Since the fixing structures 30 located in the bending region Q3 and the flat region Q4 of the display module do not perform the same function, and the tensile force and the toughness to be borne are different, the first sub-fixing structure 31 and the second sub-fixing structure 32 are made of different materials in order to make the first sub-fixing structure 31 and the second sub-fixing structure 32 perform their functions better.
In some examples, the elastic modulus of the first sub-stabilization structure 31 is smaller than the elastic modulus of the second sub-stabilization structure 32. The first sub-securing structure 31 located in the bending region Q3 of the display module is mainly used to prevent the display panel 20 from being straightened to peel the display surface from the supporting structure 10. The second sub-fixing structure 32 located in the flat area Q4 of the display module can protect the whole end face of the display module, thereby improving the reliability of the product.
Further, in order to better enable the first sub-stabilization structure 31 and the second sub-stabilization structure 32 to achieve the functions thereof, the first sub-stabilization structure 31 may be made of polymethyl methacrylate (PMMA); the second stabilizing structure 30 may be silicone. The organic glass material is also named as acrylic, has good weather resistance, small influence on the organic glass material due to temperature difference change and good ageing resistance, and is very easy to process in production and manufacture, namely the shape of the organic glass material can be changed by mechanical equipment, and various shapes can be molded by a thermoforming mode. The organosilicon material has excellent characteristics of high and low temperature resistance, electric insulation, oxidation resistance stability, weather resistance, corrosion resistance and the like. In order to effectively stabilize the display panel 20 and make it not stiff and return to flat, the elastic modulus of the first sub-stabilizing structure 31 located in the bending region Q3 of the display module assembly needs to be greater than 100Mpa for the organic glass used for the first sub-stabilizing structure 31, so as to ensure that it has sufficient rigidity and prevent the display panel 20 from being stiff and causing the display panel 20 and the support structure 10 to peel off. In order to prevent the first sub-securing structure 31 from partially dropping or completely dropping off from the display module bending region Q3 due to the pulling force caused by the display panel 20 having a tendency to straighten, the adhesion force of the first sub-securing structure 31 needs to be more than 5B. The silicone for the second sub-securing structure 32 has an elastic modulus of less than 500Mpa, and when the display module with the bending region Q3 is used for an expandable screen, the flat region Q4 can be used for the expandable region, thereby controlling the maximum elastic modulus thereof to ensure the normal use of the expandable screen.
In some examples, fig. 5 is a schematic illustration of the retraction of a laminate structure provided in embodiments of the present disclosure; FIG. 6 is another schematic illustration of the retraction of the stack structure provided in embodiments of the present disclosure; as shown in fig. 5 and 6, the display panel 20 of the display module comprises a laminated structure and a cover glass 80 which are arranged in sequence away from the support structure 10; the cover glass 80 is positioned in the orthographic projection of the support structure 10 and is superposed with the support structure 10; the cover glass 80 has an orthographic projection area on the support structure 10 that is greater than the orthographic projection area of the laminate structure on the support structure 10. In the display panel 20, the stacked structure includes the protective layer 90, the display layer 40, the polarizing layer 60, and the adhesive layer 70. In order to increase the coverage area of the end surfaces of the fixing structure 30 and the display panel 20 located in the bending region Q3, and thereby improve the fixing effect of the fixing structure 30 on the end surface of the display module bending region Q3, at least one of the protection layer 90, the polarization layer 60 and the adhesive layer 70 of the stacked structure is located in the orthographic projection area of the supporting structure 10, which is larger than the orthographic projection area of the display layer 40 located in the supporting structure. It can be understood that, by retracting a portion of the structure of the display panel 20, the amount of the pressure-sensitive adhesive applied to the end surface of the display module bending region Q3 is increased, thereby increasing the coverage area of the securing structure 30 on the end surface of the display module bending region Q3. By the method, the firm structure 30 can be more reliably prevented from peeling off the display panel 20 and the support structure 10, and meanwhile, the firm structure 30 can be prevented from peeling off the end face of the bending area Q3 of the display module.
It should be noted that the cover glass 80 may be made of ultra-thin glass or transparent material, the Adhesive layer 70 may be made of Optical Clear Adhesive (OCA), and the protective layer 90 may be made of polyimide film, synthetic rubber, and synthetic resin, and the materials of the cover glass 80, the Adhesive layer 70, and the protective layer 90 are not limited further in the embodiment of the disclosure.
In some examples, as shown in fig. 5, in an embodiment in which a part of the layer structures in the stacked structure of the display panel 20 of the display module is folded inward, the adhesive layer 70 and the display layer 40 are folded inward toward the center of the screen compared to the polarizing layer 60 and the protective layer 90, the orthographic projection of the cover glass 80 on the support structure 10 coincides with the support structure 10, the orthographic projection of the adhesive layer 70 and the orthographic projection of the display layer 40 on the support structure 10 coincide, and the orthographic projection of the polarizing layer 60 and the orthographic projection of the protective layer 90 on the support structure 10 coincide. The distance between two opposite side edges of the display module with the bending area Q3 is taken as the width. Accordingly, the support structure 10 and the display panel 20 and the cover glass 80 and the laminated structure in the display panel 20 have a width at a distance from two opposite sides with the bending region Q3. The orthographic projection width of the polarizing layer 60 and the protective layer 90 on the support structure 10 is larger than the orthographic projection width of the adhesive layer 70 and the display layer 40 on the support structure 10. The distance between the two sides of the adhesive layer 70 and the display layer 40 with the bending region Q3 and the two sides of the cover glass 80 and the support structure 10 is D1, wherein the value of D1 is between 100 and 1000 um. The distance between the two sides of the polarizing layer 60 and the protective layer 90 with the bending regions Q3 to the two sides of the cover glass 80 and the support structure 10, respectively, is D2, wherein D2 has a value between 50-500 um. By means of the method of shrinking the laminated structure part in the display panel 20, the glue coating amount is increased, the bonding area between the stable structure 30 and the end face of the display module is increased, and the adhesive force of the stable structure 30 on the end face of the display module and the stable effect of the stable structure are improved.
In some examples, as another embodiment of the partial layer structure adduction in the stacked structure of the display panel 20 of the display module, as shown in fig. 6, the polarizing layer 60 and the display layer 40 are retracted towards the center of the screen compared with the adhesive layer 70 and the protective layer 90, the orthographic projection of the cover glass 80 on the support structure 10 is coincident with the orthographic projection of the support structure 10, and the adhesive layer 70 and the protective layer 90 on the support structure 10 are coincident with each other. The distance between two opposite side edges of the display module with the bending area Q3 is taken as the width. Accordingly, the support structure 10 and the display panel 20 and the cover glass 80 and the laminated structure in the display panel 20 have a width at a distance from two opposite sides with the bending region Q3. The orthographic projection width of the adhesive layer 70 and the protective layer 90 on the support structure 10 is larger than the orthographic projection width of the polarizing layer 60 on the support structure 10. The orthographic projection width of the polarizing layer 60 on the support structure 10 is larger than the orthographic projection width of the display layer 40 on the support structure 10. By means of the method of shrinking the laminated structure part in the display panel 20, the glue coating amount is increased, the bonding area between the stable structure 30 and the end face of the display module is increased, the adhesive force of the stable structure 30 on the end face of the display module is improved, and the stable effect of the stable structure is improved. Meanwhile, by the above-mentioned inner shrinking method, the inner shrinking adhesive layer 70 is not excessive, so that the adhesive bonding area between the cover glass 80 and the laminated structure is ensured, and the adhesive bonding quality is not affected.
In some examples, fig. 7 is a schematic view of a display module provided in an embodiment of the disclosure; fig. 8 is a schematic diagram of a display module provided in an embodiment of the present disclosure after an interposer and a flexible circuit board are folded; FIG. 9 is a cross-sectional view A-A' of FIG. 8; as shown in fig. 7-9, the display module generally further includes an interposer and a flexible printed circuit board FPC, wherein in the embodiment of the disclosure, the interposer includes but is not limited to a chip on film interposer COF, but due to the flexible characteristic of the chip on film interposer COF, the flip-chip interposer is convenient for folding, and the scratch on the display module can be reduced. The display panel 20 further includes a display region Q1 and a peripheral region Q2, and the peripheral region Q2 includes a pad region on the side of the display region Q1, and a bent region Q3 on the side of the pad region away from the display region Q1.
Further, the chip on film transfer board COF is soldered to the land area of the display panel 20 to realize connection, and the flexible printed circuit board FPC is connected to the chip on film transfer board COF to realize electrical connection between the flexible printed circuit board FPC and the display panel 20. After the connection is completed, the chip on film interposer COF and the flexible printed circuit board FPC need to be folded to the back side of the display module, and the side of the support structure 10 away from the display panel 20 is the back side of the display module. On the screen without the bending area Q3, the chip on film adapter plate COF and the flexible printed circuit board FPC are directly folded to the back of the display module, because the screen does not have radian, the part of the chip on film adapter plate COF needs to be folded by nearly 180 degrees to be completely folded to the back of the display module and attached, so that the welding quality of the chip on film adapter plate COF and the pad area of the display panel 20 can be influenced, the welding part is dragged to the welding part of the chip on film adapter plate COF and the display panel 20, the welding part is led to fall off, and the normal work of the flexible printed circuit board FPC in the display module is further influenced. In the present disclosure, the bending region Q3 is added on the side of the pad region away from the display region Q1, when the chip on film interposer COF and the flexible printed circuit board FPC are folded to the side of the support structure 10 away from the display panel 20, because the chip on film transistor is partially in the bending region Q3 of the display panel 20, the chip on film interposer COF has a certain radian at this time, the traction force on each welding part of the folded pad region is reduced, and the possibility of the chip on film interposer COF being detached from the display panel 20 is reduced.
It should be noted that the area of the bending region Q3 can be different for different kinds of screens, such as a foldable screen, in which the bending region Q3 passes through the display region Q1 of the display module. The bending region Q3 of the partial narrow-bezel screen is located in the peripheral region Q2, and the pad region is located on the side of the bending region Q3 away from the display region Q1. Still some screens have two bending zones Q3, are located the relative setting in display module assembly edge, realize the full screen display of narrow frame. The embodiment provided by the present disclosure is limited to only include the interposer and the flexible printed circuit board FPC, and the bending region Q3 may be located in other positions in different types of screens, and is not further limited herein.
In a second aspect, an embodiment of the present disclosure further provides a display device, which includes any of the display modules described above. The display device can be any one of an expandable screen, a foldable screen, a full-face screen, a narrow-frame screen and the like, wherein the display screen needs to be partially folded by a display module. Set up firm structure 30 through the terminal surface to display module assembly, improved display module assembly's reliability, also improved the display device's of using this kind of display module assembly reliability simultaneously.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (15)
1. A display module comprises a support structure, a display panel and a first bonding layer for bonding the display panel and the support structure; the display module is provided with a bending area;
the display module further comprises a stabilizing structure located on the end face of the first bonding layer, and the stabilizing structure at least covers a connecting interface of the display panel and the first bonding layer in the bending area.
2. The display module according to claim 1, wherein the fixing structure covers an end surface of the display panel in the bending region and an end surface of the first adhesive layer in the bending region.
3. The display module according to claim 1, wherein the fixing structure covers an end surface of the display panel in the bending region, an end surface of the first adhesive layer in the bending region, and a connection interface between the first adhesive layer and the support structure in the bending region.
4. The display module according to claim 1, wherein the fixing structure covers an end surface of the display panel in the bending region, an end surface of the first adhesive layer in the bending region, and an end surface of the support structure in the bending region.
5. The display module of claim 1, wherein the display panel comprises a laminate structure and a cover glass arranged in sequence away from the support structure; the orthographic projection of the cover glass on the supporting structure is superposed with the supporting structure; the orthographic projection area of the cover glass on the supporting structure is larger than that of the laminated structure on the supporting structure.
6. The display module according to claim 5, wherein the laminated structure comprises a protective layer, a display layer, a polarizing layer and an adhesive layer; the protective layer the polarisation layer with glue and glue at least one deck in the layer and be located bearing structure's orthographic projection area is greater than the display layer is located bearing structure's orthographic projection area.
7. The display module of claim 1, wherein the display module further comprises a flat region; the stabilization structure comprises a first sub-stabilization structure and a second sub-stabilization structure;
the first sub-stable structure covers the connection interface of the display panel and the first bonding layer in the bending area;
the second sub-stable structure covers the connection interface of the display panel and the first bonding layer in the flat area.
8. The display module of claim 7, wherein the first sub-securing structure and the second sub-securing structure are made of different materials.
9. The display module assembly of claim 1, wherein the material of the securing structure is a pressure sensitive adhesive.
10. The display module according to claim 9, wherein the material of the pressure sensitive adhesive is any one of organic glass, synthetic rubber, synthetic resin, epoxy resin and silicone.
11. The display module of claim 7, wherein the elastic modulus of the first sub-anchoring structure is smaller than the elastic modulus of the second sub-anchoring structure.
12. The display module according to claim 11, wherein the material of the first sub-securing structure is organic glass.
13. The display module according to claim 11, wherein the material of the second sub-securing structure is silicone.
14. The display module of claim 1, wherein the display panel further comprises a display area and a peripheral area; the peripheral area comprises a pad area positioned on one side of the display area and the bending area positioned on one side of the pad area far away from the display area.
15. A display device, characterized in that the display device comprises the display module according to any one of claims 1-14.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170054106A1 (en) * | 2015-08-17 | 2017-02-23 | Samsung Display Co., Ltd. | Flexible display devices |
| KR20190070740A (en) * | 2017-12-13 | 2019-06-21 | 엘지디스플레이 주식회사 | Foldable display device |
| CN114550589A (en) * | 2022-02-22 | 2022-05-27 | 武汉天马微电子有限公司 | Display module and display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170054106A1 (en) * | 2015-08-17 | 2017-02-23 | Samsung Display Co., Ltd. | Flexible display devices |
| KR20190070740A (en) * | 2017-12-13 | 2019-06-21 | 엘지디스플레이 주식회사 | Foldable display device |
| CN114550589A (en) * | 2022-02-22 | 2022-05-27 | 武汉天马微电子有限公司 | Display module and display device |
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