Display module and display device

Abstract

The invention discloses a display module and a display device. The display panel comprises a display panel body, a filter layer and a protective adhesive layer, the display panel body comprises a display part, a binding part and a bending part located between the display part and the binding part, and the display panel body is provided with a first side and a second side which are oppositely arranged; the filter layer is located on the first side of the display panel and is arranged on the display part; the protection adhesive layer is located on the first side of the display panel, at least part of the protection adhesive layer is arranged on the bending part, and the surface of the side, close to the display part, of the protection adhesive layer is attached to the surface of the side, close to the bending part, of the filter layer. According to the display module, the surface of the side, close to the display part, of the protection adhesive layer is attached to the surface of the side, close to the bent part, of the light filtering layer, so that no gap exists between the light filtering layer and the protection adhesive layer, static electricity is effectively prevented from permeating into the display panel through the gap, and the yield of the display panel is increased.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) is an active light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Currently, display screens based on AMOLED (Active-matrix organic light-emitting diode) have been commercialized in the fields of smartphones, watches, and laptops.

[0003] However, currently, during the electrostatic discharge (ESD) capability test, the display panel is often damaged due to the ESD capability test, thereby reducing the product yield. Summary of the invention

[0004] In view of this, the purpose of the present disclosure is to provide a display module and a display device, wherein the display module shields static electricity from penetrating into a display panel, reduces damage to the display panel caused by static electricity, and improves the yield rate of the display panel.

[0005] Based on the above objectives, the present disclosure discloses a display module, which includes:

[0006] A display panel, the display panel comprising a display portion, a binding portion, and a bending portion located between the display portion and the binding portion, the display panel having a first side and a second side arranged opposite to each other;

[0007] a filter layer, the filter layer being located on the first side of the display panel and disposed on the display portion;

[0008] A protective adhesive layer, the protective adhesive layer is located on the first side of the display panel and at least a portion of the protective adhesive layer is disposed on the bending portion, wherein a surface of the protective adhesive layer close to the display portion is bonded to a surface of the filter layer close to the bending portion.

[0009] In one embodiment, the protective adhesive layer includes a first protective adhesive portion covering the bent portion, and a second protective adhesive portion extending from a side of the first protective adhesive portion close to the display portion toward a direction where the display portion is located, and a side surface of the first protective adhesive portion close to the display portion wraps a side surface of the filter layer close to the bent portion;

[0010] The second protective adhesive portion includes a covering portion, and the covering portion is located at a side of the first protective adhesive portion close to the display portion and covers a side of the filter layer away from the display panel.

[0011] In one embodiment, in a direction perpendicular to the surface where the display panel is located, the thickness of the filter layer is less than or equal to the thickness of the protective adhesive layer.

[0012] In one embodiment, the material of the protective adhesive layer includes one of a UV curing adhesive or a heat curing adhesive;

[0013] Preferably, the filter layer comprises one of a polarizer and a color filter.

[0014] In one embodiment, it further comprises:

[0015] a driving chip, wherein the driving chip is located at the first side of the display panel and on the binding portion of the display panel, and the driving chip is electrically connected to the binding portion of the display panel;

[0016] Preferably, a second protective adhesive layer is disposed around the driving chip.

[0017] In one embodiment, the protective adhesive layer further includes a third protective adhesive portion extending from a side of the first protective adhesive portion close to the binding portion toward a direction where the binding portion is located, and an orthographic projection of the third protective adhesive portion on the display panel is spaced apart from an orthographic projection of the driver chip on the display panel;

[0018] Preferably, there is a gap between the third protective adhesive portion and the driving chip.

[0019] In one embodiment, it further comprises:

[0020] a cover plate, the cover plate being located at a side of the filter layer away from the display portion of the display panel;

[0021] Preferably, the orthographic projection of the first side of the curved surface of the bending portion on the cover plate is located on the cover plate;

[0022] Preferably, the display module further comprises an adhesive layer, and the adhesive layer is located between the cover plate and the filter layer;

[0023] Preferably, the material of the adhesive layer includes transparent optical glue.

[0024] In one embodiment, it further comprises:

[0025] a buffer layer, located between the display portion of the display panel and the binding portion;

[0026] Preferably, the material of the buffer layer includes composite foam.

[0027] In one embodiment, it further comprises:

[0028] A flexible circuit board is located at a first side of the display panel and at a side of the driving chip away from the bending portion, and at least a portion of the flexible circuit board is attached to the binding portion of the display panel.

[0029] Based on the same inventive concept, the present application also provides a display device, which includes the display module described above.

[0030] Compared with the prior art, the surface of the protective adhesive layer in the display module provided by the present invention, which is close to the display part, is bonded to the surface of the filter layer, which is close to the bending part. This design eliminates a gap between the filter layer and the protective adhesive layer, and can effectively shield static electricity from penetrating into the display panel through the gap, thereby improving the yield rate of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a cross-sectional schematic diagram of a display module in a bent state in the prior art;

[0033] Figure 2 A schematic diagram of the structure of the display module provided for implementation of this application in an unbent state;

[0034] Figure 3 The cross-sectional view of the display module provided for the present application in a bent state is shown in FIG. Figure 1 ;

[0035] Figure 4 The cross-sectional view of the display module provided for the present application in a bent state is shown in FIG. Figure 2 ;

[0036] Figure 5 for Figure 4 An enlarged schematic diagram of the middle cover. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0038] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] With the development and progress of technology, OLED display devices are used more and more widely. In the preparation process of OLED display devices, reliability testing of OLED display devices is an indispensable stage in its preparation process, especially the anti-static discharge (ESD) capability test. During the anti-ESD test, the touch or display function of the screen is often broken down due to ESD, thereby affecting the product performance. In the existing technology, the anti-static performance of the display module is improved by widening the metal routing or adding new anti-static materials to resist the damage of static electricity to the actual panel circuit, such as Figure 1 As shown, there is a gap between the protective adhesive layer 30 and the filter layer 20. If the electrostatic voltage of the ESD generator is too large, the generated arc can easily penetrate into the screen through the gap, breaking down the touch or display function, and causing product failure.

[0040] Based on the above reasons, the present application provides a solution that can effectively reduce the damage caused by static electricity to display panel products. By reducing the gap between the lower frame and the screen body, static electricity is shielded from penetrating into the display panel 10, thereby reducing the damage caused by static electricity to the product and improving the yield of the display panel 10.

[0041] Next, combine Figure 2-Figure 5 To describe the display module provided in the embodiment of the present application.

[0042] The display module includes a display panel 10, a filter layer 20 and a protective adhesive layer 30. The display panel 10 includes a display portion S1, a binding portion S3 and a bending portion S2 located between the display portion S1 and the binding portion S3. The display panel 10 has a first side 11 and a second side 12 that are arranged opposite to each other. The filter layer 20 is located on the first side 11 of the display panel 10 and is arranged on the display portion S1. The protective adhesive layer 30 is located on the first side 11 of the display panel 10 and at least part of the protective adhesive layer 30 is arranged on the bending portion S2. A surface of the protective adhesive layer 30 close to the display portion S1 is bonded to a surface of the filter layer 20 close to the bending portion.

[0043] The display panel 10 in the above-mentioned display module may include an OLED display panel 10, a quantum dot light emitting diode (QLED) display panel 10, etc. The OLED display panel 10 has the advantages of small size, easy to carry, bendable and foldable, narrow frame, etc., and is increasingly used in the field of high-performance display. The following embodiments of the present application are all explained by taking the display module including the OLED display panel 10 as an example.

[0044] On this basis, when the substrate in the OLED display panel 10 is made of a flexible substrate material, the OLED display panel 10 can be a flexible display panel 10. The following embodiments of the present application are explained by taking the OLED display panel 10 as a flexible display panel 10 as an example.

[0045] It should be noted that the above-mentioned flexible substrate material may include one or more of polyethylene terephthalate (PET), polyethylene naphthalatetwo formic acid glycol ester (PEN) or polyimide (PI), etc., and the embodiment of the present application is not limited to this.

[0046] refer to Figure 2 As shown, Figure 2The present application implements a structural schematic diagram of a display module in an unbent state; the display panel 10 includes a display portion S1, a bending portion S2 located on one side of the display portion S1, and a binding portion S3 connected to the bending portion S2, the display portion S1 is used to display to the user, the bending portion S2 is the portion of the display panel 10 that realizes the bending function, and the portion adjacent to the bending portion S2 is the binding area. The binding portion S3 can be used to bind areas such as an integrated circuit (IC), a flexible printed circuit 80 (FPC), etc. to achieve connection and communication with other components. Further, the display panel 10 includes a first side 11 and a second side 12 that are arranged opposite to each other, where the first side 11 and the second side 12 specifically refer to two opposite sides along the thickness direction of the display panel 10, wherein the first side 11 of the display panel 10 is the light-emitting side of the display panel 10, and the second side 12 of the display panel 10 is the non-light-emitting side of the display panel 10, and the binding portion S3 is bent to the second side 12 (non-light-emitting side) of the display portion S1 via the bending portion S2.

[0047] refer to Figure 3 As shown, the display module includes a filter layer 20, which is located on the first side 11 of the display panel 10 and on the display portion S1 of the display panel 10, wherein the orthographic projection of the filter layer 20 on the display panel 10 is located in the display portion S1 of the display panel 10, wherein the filter layer 20 filters the light, reduces the external reflected light, thereby preventing the ambient light from affecting the display light emitted by the display panel 10, and improving the image quality of the display picture. Exemplarily, the filter layer 20 in this embodiment includes a color filter (color filter on encapsulation, referred to as COE) or a polarizer (Polarizer, referred to as POL).

[0048] refer to Figure 3As shown, the display module also includes a protective adhesive layer 30, which is located on the first side 11 of the display panel 10, and at least a portion of the protective adhesive layer 30 is located on the bending portion S2 of the display panel 10, wherein a surface of the protective adhesive layer 30 close to the display portion S1 is bonded to a surface of the filter layer 20 close to the bending portion S2. This design ensures that there is no gap between the filter layer 20 and the protective adhesive layer 30, effectively shielding static electricity from penetrating into the display panel 10 (pane) through the gap, thereby improving the yield rate of the display panel 10. Among them, at least a part of the protective adhesive layer 30 is located at the bending portion S2 of the display panel 10, which can be specifically understood as follows: the protective adhesive layer 30 includes a first protective adhesive portion 31 covering the bending portion S2, a second protective adhesive portion 32 extending from a side of the first protective adhesive portion 31 close to the display portion S1 in a direction where the display portion S1 is located, and a third protective adhesive portion 33 extending from a side of the first protective adhesive portion 31 close to the binding portion S3 in a direction where the binding portion S3 is located. The surface of the protective adhesive layer 30 close to the display portion S1 is bonded to the surface of the filter layer 20 close to the bending portion S2, which specifically refers to the surface of the second protective adhesive portion 32 close to the display portion S1 is bonded to the surface of the filter layer 20 close to the bending portion S2.

[0049] refer to Figure 4-Figure 5 As shown, further, during the anti-ESD test, external static electricity can also enter the display panel 10 through the filter layer 20, so the thickness h2 of the protective glue layer 30 in the direction perpendicular to the surface of the display panel 10 (for example, the Z direction, or the direction with an angle with the Z direction) is greater than or equal to the thickness h1 of the filter layer 20, so that the side surface of the protective glue layer 30 close to the display portion S1 completely covers the side surface of the filter layer 20 close to the display portion S1, thereby preventing external static electricity from entering the display panel 10 through the filter layer 20, and further The invention further shields static electricity from penetrating into the display panel 10 (panel), thereby improving the yield rate of the display panel 10. Since the first protective glue is formed by coating, glue overflow will occur during the curing process, so that part of the protective glue layer 30 will cover the side of the filter layer 20 away from the display panel 10 to form a covering portion 321. Specifically, the second protective glue portion 32 includes a covering portion 321, and the covering portion 321 is located on the side of the first protective glue portion 31 close to the display portion S1 and covers the side of the filter layer 20 away from the display panel 10. It should be noted that the covering portion 321 here is formed by the overflow of the first protective glue during the curing process after coating. This design enables the surface of the side of the protective glue layer 30 close to the display portion S1 to completely wrap the surface of the side of the filter layer 20 close to the display portion S1, completely avoiding the external static electricity from the filter layer 20 from entering the display panel 10 during the anti-ESD test, thereby further improving the yield rate of the display panel 10. Exemplarily, the material of the protective glue layer 30 includes one of ultraviolet curing glue and thermal curing glue.

[0050] refer to Figure 3As shown, the display module also includes a cover plate 50, and the cover plate 50 is provided with a side of the filter layer 20 away from the display panel 10, which is used to protect the surface of the display panel 10 and prevent the surface of the display panel 10 from being scratched. When the display panel 10 is in a bent state, the outer side of the curved surface of the bent portion S2 is projected on the cover plate 50, which can effectively reduce the frame area of ​​the display module, which is conducive to realizing a narrow frame design. Since the cover plate 50 is located on the light-emitting side of the display panel 10, when making the cover plate 50, a material with a large light transmittance, such as glass material, is selected, so that the cover plate 50 can protect the display panel 10 while ensuring that the display panel 10 has a sufficient amount of light output, thereby ensuring the overall display effect of the flexible display panel 10. Further, the display module also includes an adhesive layer 40, which is located between the cover plate 50 and the filter layer 20, and plays a role of bonding and fixing. The material of the adhesive layer 40 includes transparent optical glue.

[0051] refer to Figure 3 As shown, the display module also includes a buffer layer 60, which is located on the second side 12 of the display panel 10 and on the display portion S1 of the display panel 10. The material of the buffer layer 60 can be a composite foam, such as copper foil foam or aluminum foil foam. The buffer layer 60 can play a shielding role to prevent electromagnetic interference generated by the circuit board on the binding portion S3 of the display panel 10. At the same time, the buffer layer 60 can play a buffering role, alleviate the external impact received during the production or use of the flexible display panel 10, and protect the display panel 10. In addition, since the buffer layer 60 is a foam structure and has a good heat dissipation effect, the buffer layer 60 can also play a heat dissipation role, so that the heat generated by the display panel 10 during use can be quickly and effectively discharged through the buffer layer 60, avoiding overheating inside the flexible display panel 10, affecting the display effect and service life of the display module. It should be noted that before the buffer layer 60 is attached, a support layer is provided on the second side 12 of the display panel 10. The support layer is a process film layer, which needs to be removed (such as peeling) before the buffer layer 60 is attached.

[0052] refer to Figure 1As shown, the display module also includes a driver chip 70, which is located on the first side 11 of the display panel 10 and on the binding portion S3 of the display panel 10. The driver chip 70 is electrically connected to the binding portion S3 of the display panel 10. The driver chip 70 is electrically connected to the array substrate in the display portion S1 through the wiring in the binding portion S3 and the bending portion S2, and transmits display signals to the devices in the display portion S1. The display portion S1 presents a corresponding display screen according to the display signals. The driver chip 70 is, for example, an IC driver chip 70 (Integrated Circuit Driver Chip), which is an integrated circuit chip used to drive the operation of other electronic devices or systems. The driver chip 70 is usually designed to control and manage various electronic devices, such as motor drive, display screen drive, LED drive, sensor interface, etc. By integrating IC on the display panel 10, a more highly integrated flexible display solution can be achieved, while ensuring that the display panel 10 has the required functions and performance. Furthermore, a second protective adhesive layer 71 (also called IC sealing glue) is provided around the driver chip 70. The material of the second protective adhesive layer 71 includes but is not limited to UV glue. By providing the second protective adhesive layer 71, the driver chip 70 is fixed to the binding portion S3 of the display panel 10, thereby improving the bonding strength of the driver chip 70, and avoiding the driver chip 70 cracking during module production and RA and display abnormalities caused by peeling with the display panel 10. The positive projection of the third protective adhesive portion 33 of the above-mentioned protective adhesive layer 30 on the display panel 10 is arranged at an interval from the positive projection of the driver chip 70 on the display panel 10. Furthermore, the third protective adhesive portion 33 and the third protective adhesive portion 33 of the protective adhesive layer 30 have a gap. This design avoids the protective adhesive layer 30 from affecting the functions of other components around the bending portion S2.

[0053] refer to Figure 1 As shown, the display module also includes a flexible printed circuit board 80 (Flexible Printed Circuit Board, FPC), which is located on the first side 11 of the display panel 10, and part of the flexible printed circuit board 80 is located on the binding portion S3 of the display panel 10. One end of the flexible printed circuit board 80 is connected to the binding portion S3, and the other end thereof is provided with a connection port, which is used to connect the display panel 10 with a controller in the display device, so that the display panel 10 can display the image required by the display device. Furthermore, a third protective adhesive layer 81 is provided on the side of the binding portion S3 of the display panel 10 away from the display portion S1, and the third protective adhesive layer 81 is used to adhere the flexible printed circuit board 80 to the binding portion S3 of the display panel 10.

[0054] The embodiment of the second aspect of the present disclosure further provides a display device, comprising the display module of any of the above-mentioned first aspect embodiments. Since the display device provided by the embodiment of the second aspect of the present disclosure comprises the display module of any of the above-mentioned first aspect embodiments, the display device provided by the embodiment of the second aspect of the present disclosure has the beneficial effects of the display module of any of the above-mentioned first aspect embodiments, which will not be described in detail here.

[0055] The display device in the embodiment of the present invention includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart fixed-line phones, consoles and other devices with display functions.

[0056] It should be noted that some embodiments of the present disclosure are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0057] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display module, characterized in that: include: A display panel, the display panel comprising a display portion, a binding portion, and a bending portion located between the display portion and the binding portion, the display panel having a first side and a second side arranged opposite to each other; a filter layer, the filter layer being located on the first side of the display panel and disposed on the display portion; A protective adhesive layer, the protective adhesive layer is located on the first side of the display panel and at least a portion of the protective adhesive layer is disposed on the bending portion, wherein a surface of the protective adhesive layer close to the display portion is bonded to a surface of the filter layer close to the bending portion.

2. The display module according to claim 1, wherein: The protective adhesive layer includes a first protective adhesive portion covering the bent portion, and a second protective adhesive portion extending from a side of the first protective adhesive portion close to the display portion toward a direction where the display portion is located, wherein a side surface of the first protective adhesive portion close to the display portion wraps a side surface of the filter layer close to the bent portion; The second protective adhesive portion includes a covering portion, and the covering portion is located at a side of the first protective adhesive portion close to the display portion and covers a side of the filter layer away from the display panel.

3. The display module according to claim 1, wherein: In a direction perpendicular to the surface where the display panel is located, the thickness of the filter layer is less than or equal to the thickness of the protective adhesive layer.

4. The display module according to claim 1, wherein: The material of the protective adhesive layer includes one of ultraviolet curing adhesive or thermal curing adhesive; Preferably, the filter layer includes one of a polarizer and a color filter.

5. The display module according to claim 2, wherein: Also includes: a driving chip, wherein the driving chip is located at the first side of the display panel and on the binding portion of the display panel, and the driving chip is electrically connected to the binding portion of the display panel; Preferably, a second protective adhesive layer is disposed around the driving chip.

6. The display module according to claim 5, characterized in that: The protective adhesive layer further includes a third protective adhesive portion extending from a side of the first protective adhesive portion close to the binding portion toward a direction where the binding portion is located, and an orthographic projection of the third protective adhesive portion on the display panel is spaced apart from an orthographic projection of the driving chip on the display panel; Preferably, there is a gap between the third protective adhesive portion and the driving chip.

7. The display module according to claim 1, wherein: Also includes: a cover plate, the cover plate being located at a side of the filter layer away from the display portion of the display panel; Preferably, the orthographic projection of the first side of the curved surface of the bending portion on the cover plate is located on the cover plate; Preferably, the display module further comprises an adhesive layer, and the adhesive layer is located between the cover plate and the filter layer; Preferably, the material of the adhesive layer includes transparent optical glue.

8. The display module according to claim 1, wherein: Also includes: a buffer layer, located between the display portion of the display panel and the binding portion; Preferably, the material of the buffer layer includes composite foam.

9. The display module according to claim 4, wherein: Also includes: A flexible circuit board is located at a first side of the display panel and at a side of the driving chip away from the bending portion, and at least a portion of the flexible circuit board is attached to the binding portion of the display panel.

10. A display device, characterized in that: The display device comprises a display module as described in any one of claims 1-9.

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