Display module and display device

Abstract

The invention provides a display module and a display device. The display module at least comprises a first display panel, a second display panel and a printed circuit board, the second display panel is located on one side of the first display panel; the printed circuit board is electrically connected with the first display panel and the second display panel, the first display panel and the second display panel share the printed circuit board, one end of the flexible circuit board is electrically connected with the printed circuit board, and the other end of the flexible circuit board is electrically connected with the second display panel. The other end of the flexible circuit board is electrically connected with one of the first display panel and the second display panel.

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] Organic Light-Emitting Diode (OLED) display technology is widely used in consumer electronics, automobiles, aerospace and other fields. However, in the fields of science, education and culture (such as large-scale display walls in museums), its potential has yet to be fully tapped. In scenes like museums, in addition to the basic demand for high image quality, higher requirements are also placed on the creation of display atmosphere and high integration. For large-scale display walls in cultural venues such as museums, how to overcome the limitations of traditional display technology in size and flexibility, and how to ensure the stability and reliability of the display have become urgent issues to be solved.

[0003] The above information disclosed in this section is only for understanding the background of the inventive concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art. Summary of the invention

[0004] In one aspect, a display module is provided, which includes at least a first display panel, a second display panel and a printed circuit board; the second display panel is located on one side of the first display panel; the printed circuit board is electrically connected to the first display panel and the second display panel, respectively, wherein the first display panel and the second display panel share the printed circuit board, and the display module also includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the printed circuit board, and the other end of the flexible circuit board is electrically connected to one of the first display panel and the second display panel.

[0005] According to some exemplary embodiments, at least one of the first display panel and the second display panel includes a display portion, a binding portion, and a bending portion connecting the display portion and the binding portion, and the binding portion is bent to a side away from the light emitting side of the display portion by the bending portion, and the display module also includes a driving chip; and the driving chip is disposed on the binding portion; or the flexible circuit board includes a chip-on-chip film, the driving chip is disposed on the chip-on-chip film, and the chip-on-chip film is connected to the binding portion; or the flexible circuit board includes a flexible circuit board, the driving chip is disposed on the flexible circuit board, and the flexible circuit board is connected to the binding portion.

[0006] According to some exemplary embodiments, at least one of the first display panel and the second display panel includes a display portion and a binding portion located on one side of the display portion, the flexible circuit board includes a chip-on-chip film and a driver chip located on the chip-on-chip film, the chip-on-chip film is connected to the binding portion, and the driver chip is bent to a side away from the light emitting side of the display portion through the chip-on-chip film.

[0007] According to some exemplary embodiments, at least one of the first display panel and the second display panel includes a display portion and a binding portion located on one side of the display portion, the flexible circuit board includes a flexible circuit board and a driving chip located on the flexible circuit board, the flexible circuit board is connected to the binding portion, and the driving chip is bent through the flexible circuit board to a side away from the light emitting side of the display portion.

[0008] According to some exemplary embodiments, the printed circuit board is in contact with a side of the first display panel away from the light emitting side, and a connection distance between the binding parts of the printed circuit board and the first display panel is less than or equal to a connection distance between the binding parts of the printed circuit board and the second display panel; or the printed circuit board is in contact with a side of the second display panel away from the light emitting side, and a connection distance between the binding parts of the printed circuit board and the second display panel is less than or equal to a connection distance between the binding parts of the printed circuit board and the first display panel; or the printed circuit board has no contact with either the first display panel or the second display panel.

[0009] According to some exemplary embodiments, the display module also includes a light shading layer, which is located on the light emitting sides of the first display panel and the second display panel, and the light shading layer includes a first light shading portion, a second light shading portion and a third light shading portion; the orthographic projection of the edge of the first display panel on the light shading layer is located within the first light shading portion and the second light shading portion, and the orthographic projection of the edge of the second display panel on the light shading layer is located within the second light shading portion and the third light shading portion; and the color of the second light shading portion is different from the color of the first light shading portion, and the color of the third light shading portion is the same as the color of the first light shading portion.

[0010] According to some exemplary embodiments, at least one of the first display panel and the second display panel includes a touch electrode layer.

[0011] According to some exemplary embodiments, the display module also includes a first touch layer and a first touch circuit board, the orthographic projection of the first display panel on the first touch layer is located in the first touch layer, and the first touch layer is connected to the first touch circuit board; and / or, the display module also includes a second touch layer and a second touch circuit board, the orthographic projection of the second display panel on the second touch layer is located in the second touch layer, and the second touch layer is connected to the second touch circuit board.

[0012] According to some exemplary embodiments, the display module further includes a polarizing layer, which is located on the light emitting sides of the first display panel and the second display panel, and the orthographic projections of the first display panel and the second display panel on the polarizing layer are located within the polarizing layer.

[0013] According to some exemplary embodiments, the display module also includes a cover plate, which is bonded to the side of the polarizing layer away from the first display panel and the second display panel through an optical adhesive layer; or, the cover plate is bonded to the side of the polarizing layer away from the first display panel and the second display panel through a first optical adhesive portion and a second optical adhesive portion respectively, and the orthographic projection of the first display panel on the first optical adhesive portion is located in the first optical adhesive portion, and the orthographic projection of the second display panel on the second optical adhesive portion is located in the second optical adhesive portion.

[0014] According to some exemplary embodiments, the display module further includes a supporting layer, which is located on a side of the first display panel and the second display panel away from a light emitting side, and the orthographic projections of the first display panel and the second display panel on the supporting layer are located within the supporting layer.

[0015] According to some exemplary embodiments, the supporting layer includes a first surface and a second surface, the first surface is close to the first display panel and the second display panel, the second surface is far away from the first display panel and the second display panel, and a groove is provided on the first surface and / or the second surface, and the groove overlaps with the splicing area of ​​the first display panel and the second display panel.

[0016] According to some exemplary embodiments, the display module further includes a sealing portion, wherein the sealing portion is located between the first display panel and the second display panel.

[0017] According to some exemplary embodiments, in a cross section perpendicular to a light emitting direction of the display module, an area of ​​the first display panel is unequal to an area of ​​the second display panel.

[0018] In another aspect, a display device is provided, comprising the display module as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other objects and advantages of the present disclosure will be apparent from the following description of the present disclosure with reference to the accompanying drawings, and will help to have a comprehensive understanding of the present disclosure.

[0020] Figure 1 A top view of a display module according to some embodiments of the present disclosure is schematically shown.

[0021] Figure 2a and Figure 2b The schematic diagrams of the structures of the first display panel or the second display panel in a non-bent state and a bent state respectively according to some embodiments of the present disclosure are schematically shown.

[0022] Figure 3 and Figure 4 A top view of a display module according to some embodiments of the present disclosure is schematically shown.

[0023] Figure 5a The figure schematically shows a connection diagram between a first display panel or a second display panel and a chip-on-film according to some embodiments of the present disclosure.

[0024] Figure 5b A top view of a display module according to some embodiments of the present disclosure is schematically shown.

[0025] Figure 6a The figure schematically shows a connection diagram between a first display panel or a second display panel and a flexible circuit board according to some embodiments of the present disclosure.

[0026] Figure 6b A top view of a display module according to some embodiments of the present disclosure is schematically shown.

[0027] Figure 7 The figure schematically shows the contact between the printed circuit board and the second display panel according to some embodiments of the present disclosure.

[0028] Figure 8 A schematic diagram schematically illustrates that a printed circuit board according to some embodiments of the present disclosure has no contact with either the first display panel or the second display panel.

[0029] Figure 9a and Figure 9b Schematically shows a display module according to some embodiments of the present disclosure Figure 1 Cross-sectional view along the A-A' direction.

[0030] Figure 10a to Figure 10e Schematically shows a display module according to some embodiments of the present disclosure Figure 1 Cross-sectional view along the A-A' direction. DETAILED DESCRIPTION

[0031] In the following description, for the purpose of explanation, many specific details are set forth to provide a comprehensive understanding of various exemplary embodiments. However, it is apparent that various exemplary embodiments may be implemented without these specific details or with one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, the specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0032] In the accompanying drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. Thus, the size and relative size of each element are not necessarily limited to the size and relative size shown in the drawings. In addition, the same reference numerals represent the same elements.

[0033] When an element is described as being "on" another element, "connected to" another element, or "coupled to" another element, the element may be directly on, directly connected to, or directly coupled to another element, or there may be intermediate elements. However, when an element is described as being "directly on" another element, "directly connected to" another element, or "directly coupled to" another element, there are no intermediate elements. Other terms and / or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, "between" versus "directly between", "adjacent" versus "directly adjacent", or "on" versus "directly on", etc. In addition, the term "connected" may refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection.

[0034] It should be understood that, although the terms first, second, etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiment, the first element may be named as the second element, and similarly, the second element may be named as the first element.

[0035] In the related art, due to the limitations of size and flexibility of traditional display technology, it is impossible to meet the requirements of large-scale display walls in cultural venues such as museums for creating a display atmosphere and high integration, and it is impossible to ensure the stability and reliability of the display. Therefore, in order to solve at least one aspect of the above technical problems, the embodiments of the present disclosure provide a display module and a display device, which are conducive to improving the flexibility of display size and the stability and reliability of display.

[0036] Figure 1 is a top view of a display module according to some embodiments of the present disclosure. Figure 2a and Figure 2b 1 is a schematic structural diagram of the first display panel 101 or the second display panel 102 in a non-bent state and a bent state, respectively, according to some embodiments of the present disclosure. Figure 3 and Figure 4 is a top view of a display module according to some embodiments of the present disclosure.

[0037] Reference Figures 1 to 4 The display module at least includes a first display panel 101, a second display panel 102 and a printed circuit board 103 (Printed Circuit Board, abbreviated as PCB); the second display panel 102 is located on one side of the first display panel 101; the printed circuit board 103 is electrically connected to the first display panel 101 and the second display panel 102 respectively, wherein the first display panel 101 and the second display panel 102 share the printed circuit board 103, and the display module also includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the printed circuit board 103, and the other end of the flexible circuit board is electrically connected to one of the first display panel 101 and the second display panel 102.

[0038] For example, refer to Figure 1 The flexible circuit board may include a flexible printed circuit board 105 (Flexible Printed Circuit, abbreviated as FPC), and the flexible printed circuit board 105 is divided into a first flexible printed circuit board 1051 and a second flexible printed circuit board 1052. One end of the first flexible printed circuit board 1051 is electrically connected to the printed circuit board 103, and the other end of the first flexible printed circuit board 1051 is electrically connected to the first display panel 101; one end of the second flexible printed circuit board 1052 is electrically connected to the printed circuit board 103, and the other end of the second flexible printed circuit board 1052 is electrically connected to the second display panel 102.

[0039] For example, refer to Figure 3 The flexible circuit board may include a chip on film (COF) 106 , and the chip on film 106 includes a first chip on film 1061 . One end of the first chip on film 1061 is electrically connected to the printed circuit board 103 , and the other end of the first chip on film 1061 is electrically connected to the first display panel 101 .

[0040] It can be understood that in this embodiment, the connection between the first display panel 101 and the second display panel 102 is achieved through the printed circuit board 103 and the flexible circuit board. Compared with traditional complex wiring, the use of materials can be significantly reduced, and the material and processing costs are reduced. At the same time, the assembly process is simplified, the error rate of electrical connections is reduced, and maintenance and replacement become easier.

[0041] It should be noted that Figure 1 , Figure 3 and Figure 4 In the figure, only a display module including two display panels (i.e., a first display panel 101 and a second display panel 102) is used as an example for illustration. In actual applications, the display module may include more than two display panels for splicing display, thereby improving the flexibility of display size and meeting large-size display requirements.

[0042] It should be noted that, in this embodiment, the display module can be used for indoor display, and the first display panel 101 and the second display panel 102 can be OLED display panels, so as to utilize the self-luminous characteristics of organic materials to present a visual experience of high contrast, bright colors and ultra-wide viewing angle. Furthermore, the first display panel 101 and the second display panel 102 can also be flexible OLED display panels. Flexible OLED display panels have the characteristics of being bendable and foldable, which can not only provide excellent picture quality, but also be integrated into various display designs in a more flexible way, providing unlimited possibilities for creating more flexible display effects. In some embodiments, the size of the first display panel 101 and the second display panel 102 is greater than or equal to 20 inches and less than or equal to 50 inches, for example, the size of the first display panel 101 and the second display panel 102 is any value of 20 inches, 30 inches, 35 inches, 40 inches, and 50 inches. For example, the aspect ratio of the first display panel 101 and the second display panel 102 is 16:9 or 16:10.

[0043] It should be noted that in the display module, the printed circuit board 103 provides mechanical support and electrical connection for various electronic components to achieve connection of a predetermined circuit and signal transmission. In this embodiment, by connecting the first display panel 101 and the second display panel 102 to the same printed circuit board 103, that is, the first display panel 101 and the second display panel 102 share the printed circuit board 103, and using the same printed circuit board 103 to control the first display panel 101 and the second display panel 102, stable signal transmission and efficient display control can be achieved, and display inconsistency caused by signal delay or loss can be avoided, thereby improving the stability and reliability of the display. In addition, display panels of standardized sizes can also be mass-produced. By splicing display panels of standardized sizes, the needs of various display sizes can be met, thereby reducing the need for customized production to reduce manufacturing costs.

[0044] In some embodiments of the present disclosure, in a cross section perpendicular to the light emitting direction of the display module, the area of ​​the first display panel 101 is not equal to the area of ​​the second display panel 102. That is, the area of ​​the first display panel 101 may be larger than the area of ​​the second display panel 102, or the area of ​​the first display panel 101 may be smaller than the area of ​​the second display panel 102. The following description is made by taking the example that the area of ​​the first display panel 101 is larger than the area of ​​the second display panel 102, that is, the first display panel 101 is the main screen, and the second display panel 102 is the secondary screen.

[0045] It can be understood that in this embodiment, the first display panel 101 (i.e., the main screen) can be used as the main carrier of the display content and undertake the task of conveying core information. The second display panel 102 (i.e., the secondary screen) is used to create an atmosphere or highlight a specific theme. It can be a theme introduction or atmosphere display of the product, or it can display some prompts (i.e., interactive display). The combined display of the main screen and the secondary screen allows different content to be displayed in a coordinated manner, making the entire display rich and harmonious, enhancing the diversity and interactivity of the display, enhancing the audience's immersive experience, and meeting the needs of different exhibitions and activities.

[0046] In some embodiments of the present disclosure, referring to Figure 2a At least one of the first display panel 101 and the second display panel 102 includes a display portion 11, a binding portion 13, and a bending portion 12 connecting the display portion 11 and the binding portion 13. Figure 2b The binding portion 13 is bent by the bending portion 12 to the light-emitting side away from the display portion 11 (the light-emitting side is Figure 2b The light emitting side of the display portion 11 is the front side of the display panel, and the side opposite to the light emitting side is the back side of the display panel. That is, in this embodiment, by bending the display panel, the binding portion 13 can be bent to the back side of the display panel, thereby not occupying the display area and realizing "borderless" display.

[0047] It should be noted that, in the present embodiment, only the binding portion 13 of the first display panel 101 may be bent to the back side through the bending portion 12, or only the binding portion 13 of the second display panel 102 may be bent to the back side through the bending portion 12, or both the binding portions 13 of the first display panel 101 and the second display panel 102 may be bent to the back side through the bending portion 12. The following description will be made by taking the case where the binding portion 13 of the first display panel 101 is bent to the back side through the bending portion 12 as an example.

[0048] Continue to refer to Figure 1The display module further includes a driver chip 104, which is used to generate appropriate voltage and current signals to drive the pixels on the display panel. The driver chip 104 can be disposed on the binding portion 13, that is, the driver chip 104 (Chip On Plastic, abbreviated as COP) is disposed on the bendable plastic substrate. Specifically, the driver chip 104 can be bound to the binding portion 13 through an anisotropic conductive film (Anisotropic Conductive Film, abbreviated as ACF), which can achieve vertical conductivity and horizontal insulation, so as to improve the accuracy of the thermal compression bonding process.

[0049] It should be noted that, in this embodiment, the binding portion 13 of the first display panel 101 can be directly connected to the printed circuit board 103, that is, the driving chip 104 of the first display panel 101 is disposed on the binding portion 13, and the binding portion 13 is connected to the printed circuit board 103, and no other connecting components are required in the middle, thereby reducing the loss of signal transmission. In other embodiments, the binding portion 13 of the first display panel 101 can also be connected to the printed circuit board 103 through a flexible circuit board 105 (such as Figure 1 As shown in the figure, the setting position of the printed circuit board 103 is not limited to the binding portion 13 close to the first display panel 101. The flexible circuit board 105 is divided into a first flexible circuit board 1051 and a second flexible circuit board 1052. The binding portion 13 of the first display panel 101 is connected to the printed circuit board 103 through the first flexible circuit board 1051, and the binding portion 13 of the second display panel 102 is connected to the printed circuit board 103 through the second flexible circuit board 1052.

[0050] It should be noted that, since the area of ​​the first display panel 101 is relatively large, the corresponding binding portion 13 is also relatively wide, so the first flexible circuit board 1051 can be divided into several small boards (for example, Figure 1 3 as shown), the multiple binding terminals of the binding part 13 are bound separately, which can reduce the difficulty of binding. In other embodiments, in order to reduce costs, only one large first flexible circuit board 1051 can be set, and the embodiments of the present disclosure are not limited thereto.

[0051] It can be understood that in this embodiment, the connection between the first display panel 101 and the second display panel 102 is achieved through the printed circuit board 103 and the flexible circuit board 105, which can significantly reduce the use of materials compared to traditional complex wiring, while simplifying the assembly process, reducing the error rate of electrical connections, and making maintenance and replacement easier.

[0052] In some embodiments of the present disclosure, referring to Figure 3The flexible circuit board includes a COF 106, a driver chip 104 is disposed on the COF 106, and the COF 106 is connected to the binding portion 13. That is, the binding portion 13 of the first display panel 101 is bent to the back through the bending portion 12 and then connected to the COF 106. The driver chip 104 is disposed on the COF 106, so that the driver chip 104 does not need to be integrated on the binding portion 13, which can reduce the process difficulty of manufacturing the first display panel 101. The binding portion 13 can be connected to the COF 106 through the ACF, and the end of the COF 106 away from the binding portion 13 can be directly connected to the printed circuit board 103 (such as Figure 3 The first display panel 101 and the second display panel 102 may be connected to each other through the first chip-on-film 1061 and the second chip-on-film 1062. The first display panel 101 and the second display panel 102 may be connected to each other through the first chip-on-film 1061 and the second display panel 102 may be connected to each other through the second chip-on-film 1062. Specifically, the second chip-on-film 106 may be connected to the printed circuit board 103 through the second flexible circuit board 1052.

[0053] In some embodiments of the present disclosure, referring to Figure 4 The flexible circuit board includes a flexible circuit board 105, a driving chip 104 is arranged on the flexible circuit board 105, and the flexible circuit board 105 is connected to the binding portion 13. That is, the binding portion 13 of the first display panel 101 is bent to the back side through the bending portion 12 and connected to the first flexible circuit board 1051, and the driving chip 104 is arranged on the first flexible circuit board 1051, so that the driving chip 104 does not need to be integrated on the binding portion 13, which can reduce the process difficulty of manufacturing the first display panel 101. The binding portion 13 of the first display panel 101 can be connected to the first flexible circuit board 1051 through ACF, and the end of the first flexible circuit board 1051 away from the binding portion 13 is directly connected to the printed circuit board 103. In some embodiments, the binding portion 13 of the second display panel 102 can also be bent to the back side through the bending portion 12 and then connected to the second flexible circuit board 1052, and the driving chip 104 of the second display panel 102 is set on the second flexible circuit board 1052, and the end of the second flexible circuit board 1052 away from the binding portion 13 of the second display panel 102 is directly connected to the printed circuit board 103.

[0054] In some embodiments of the present disclosure, referring to Figure 1 , Figure 2b , Figure 3 and Figure 4, the printed circuit board 103 is in contact with the side of the first display panel 101 away from the light emitting side (i.e., the back side of the first display panel 101), for example, the printed circuit board 103 is fixed to the back side of the first display panel 101 by double-sided tape. The connection distance x1 between the printed circuit board 103 and the binding portion 13 of the first display panel 101 is less than or equal to the connection distance x2 between the printed circuit board 103 and the binding portion 13 of the second display panel 102. It should be noted that the connection distance refers to the length of the connecting component between the printed circuit board 103 and the binding portion 13. For example, the printed circuit board 103 and the binding portion 13 are connected by a flexible circuit board, and the connection distance is the length of the flexible circuit board along the extension direction. Specifically, as Figure 1 As shown, the printed circuit board 103 and the binding portion 13 of the first display panel 101 are connected via the first flexible circuit board 1051, and the connection distance x1 between the printed circuit board 103 and the binding portion 13 of the first display panel 101 is the length of the first flexible circuit board 1051; the printed circuit board 103 and the binding portion 13 of the second display panel 102 are connected via the second flexible circuit board 1052, and the connection distance x2 between the printed circuit board 103 and the binding portion 13 of the second display panel 102 is the length of the second flexible circuit board 1052.

[0055] It can be understood that by disposing the printed circuit board 103 on the back side of the first display panel 101, that is, the connection distance x1 between the printed circuit board 103 and the binding portion 13 of the first display panel 101 is less than or equal to the connection distance x2 between the printed circuit board 103 and the binding portion 13 of the second display panel 102, the length of the connecting component between the first display panel 101 and the printed circuit board 103 can be shortened, the loss of signal transmission can be reduced, and the cost of materials can be saved.

[0056] It should be noted that the printed circuit board 103 can be a large board, or the printed circuit board 103 can be divided into several small boards, and the heating components on the printed circuit board 103 can be separately arranged on different small boards to prevent the printed circuit board 103 from being damaged by overheating.

[0057] In some embodiments of the present disclosure, referring to Figure 1 , Figure 3 and Figure 4 The display module further includes a light shielding layer 20, which is located on the light-emitting sides of the first display panel 101 and the second display panel 102. Specifically, the light shielding layer 20 is located on the cover plate 600 (refer to Figure 9a) is close to the side of the first display panel 101 and the second display panel 102. The light shielding layer 20 includes a first light shielding portion 201, a second light shielding portion 202 and a third light shielding portion 203. The orthographic projection of the edge of the first display panel 101 on the light shielding layer 20 is located in the first light shielding portion 201 and the second light shielding portion 202, and the orthographic projection of the edge of the second display panel 102 on the light shielding layer 20 is located in the second light shielding portion 202 and the third light shielding portion 203, that is, the second light shielding portion 202 is used to cover the joint of the first display panel 101 and the second display panel 102. The color of the second light shielding portion 202 is different from the color of the first light shielding portion 201, and the color of the third light shielding portion 203 is the same as the color of the first light shielding portion 201. The first light shielding portion 201 and the third light shielding portion 203 are, for example, black ink, and the second light shielding portion 202 is, for example, ink of other colors except black ink.

[0058] It can be understood that in this embodiment, by using a second shading portion 202 of a different color for decoration at the splicing, not only can the wiring at the splicing be shielded to avoid visual gaps and light leakage problems caused by mechanical splicing, but also the color difference between the first display panel 101 and the second display panel 102 and the second shading portion 202 can be avoided to be too large, and the transition in the middle is unnatural, which further enhances the overall visual effect and the overall aesthetics of the display wall, makes the display wall more visually coherent, and enhances the audience's immersive experience.

[0059] It should be noted that, in other embodiments, the color of the first light shielding portion 201, the color of the second light shielding portion 202, and the color of the third light shielding portion 203 may all be the same. Or the color of the second light shielding portion 202 is different from the color of the first light shielding portion 201, and the color of the second light shielding portion 202 is the same as the color of the third light shielding portion 203. Or the color of the second light shielding portion 202 is the same as the color of the first light shielding portion 201, and the color of the second light shielding portion 202 is different from the color of the third light shielding portion 203. Or the color of the first light shielding portion 201, the color of the second light shielding portion 202, and the color of the third light shielding portion 203 are all different, and the embodiments of the present disclosure are not limited thereto.

[0060] Figure 5a 1 is a schematic diagram of connecting the first display panel 101 or the second display panel 102 and the COF 106 according to some embodiments of the present disclosure. Figure 5b is a top view of a display module according to some embodiments of the present disclosure.

[0061] Reference Figure 5a and Figure 5bIn some embodiments of the present disclosure, at least one of the first display panel 101 and the second display panel 102 includes a display portion 11 and a binding portion 13 located on one side of the display portion 11. The flexible circuit board includes a chip-on-film 106 and a driver chip 104 located on the chip-on-film 106, the chip-on-film 106 is connected to the binding portion 13, and the driver chip 104 is bent to a side away from the light-emitting side of the display portion 11 through the chip-on-film 106.

[0062] It should be noted that, in the present embodiment, only the driver chip 104 of the first display panel 101 may be bent to the back side through the chip-on-chip film 106, or only the driver chip 104 of the second display panel 102 may be bent to the back side through the chip-on-chip film 106, or both the driver chips 104 of the first display panel 101 and the second display panel 102 may be bent to the back side through the chip-on-chip film 106. The following description will be made by taking the example of the driver chip 104 of the first display panel 101 being bent to the back side through the first chip-on-chip film 1061.

[0063] Specifically, Figure 5a and Figure 5b As shown, one end of the first COF 1061 is connected to the binding portion 13 of the first display panel 101, and one end of the first COF 1061 away from the binding portion 13 of the first display panel 101 is bent to the back of the first display panel 101 and connected to the printed circuit board 103. Specifically, one end of the first COF 1061 away from the binding portion 13 of the first display panel 101 can be directly connected to the printed circuit board 103, or connected to the printed circuit board 103 through the first flexible circuit board 1051 (such as Figure 5b As shown), there is no need to bend the first display panel 101, which can reduce the process difficulty of manufacturing the first display panel 101.

[0064] Figure 6a 1 is a schematic diagram of connecting the first display panel 101 or the second display panel 102 with the flexible circuit board 105 according to some embodiments of the present disclosure. Figure 6b is a top view of a display module according to some embodiments of the present disclosure.

[0065] Reference Figure 6a and Figure 6b In some embodiments of the present disclosure, at least one of the first display panel 101 and the second display panel 102 includes a display portion 11 and a binding portion 13 located on one side of the display portion 11. The flexible circuit board includes a flexible circuit board 105 and a driving chip 104 located on the flexible circuit board 105, the flexible circuit board 105 is connected to the binding portion 13, and the driving chip 104 is bent to a side away from the light emitting side of the display portion 11 through the flexible circuit board 105.

[0066] It should be noted that, in the present embodiment, only the driver chip 104 of the first display panel 101 may be bent to the back side through the flexible circuit board 105, or only the driver chip 104 of the second display panel 102 may be bent to the back side through the flexible circuit board 105, or both the driver chips 104 of the first display panel 101 and the second display panel 102 may be bent to the back side through the flexible circuit board 105. The following description will be made by taking the example of the driver chip 104 of the first display panel 101 being bent to the back side through the first flexible circuit board 1051.

[0067] Specifically, Figure 6a and Figure 6b As shown, one end of the first flexible circuit board 1051 is connected to the binding portion 13 of the first display panel 101, and one end of the first flexible circuit board 1051 away from the binding portion 13 of the first display panel 101 is bent to the back of the first display panel 101 and connected to the printed circuit board 103. Therefore, there is no need to bend the first display panel 101, which can reduce the process difficulty of manufacturing the first display panel 101.

[0068] Figure 7 is a schematic diagram of the printed circuit board 103 contacting the second display panel 102 according to some embodiments of the present disclosure. Figure 8 is a schematic diagram showing that the printed circuit board 103 has no contact with the first display panel 101 and the second display panel 102 according to some embodiments of the present disclosure.

[0069] Reference Figure 7 In some embodiments of the present disclosure, the printed circuit board 103 is in contact with a side of the second display panel 102 away from the light emitting side (ie, the back side of the second display panel 102) (eg Figure 2b As shown in FIG. 1 , for example, the printed circuit board 103 is fixed to the back of the second display panel 102 by double-sided adhesive. The connection distance x3 between the printed circuit board 103 and the binding portion 13 of the second display panel 102 is less than or equal to the connection distance x4 between the printed circuit board 103 and the binding portion 13 of the first display panel 101. Specifically, as Figure 7 As shown, the printed circuit board 103 and the binding portion 13 of the first display panel 101 are connected via the first flexible circuit board 1051, and the connection distance x4 between the printed circuit board 103 and the binding portion 13 of the first display panel 101 is the length of the first flexible circuit board 1051; the printed circuit board 103 and the binding portion 13 of the second display panel 102 are directly connected, and the connection distance x3 between the printed circuit board 103 and the binding portion 13 of the second display panel 102 is the connection length x3 of the binding portion 13 of the printed circuit board 103 and the second display panel 102.

[0070] It can be understood that by disposing the printed circuit board 103 on the back side of the second display panel 102, that is, the connection distance x3 between the printed circuit board 103 and the binding portion 13 of the second display panel 102 is less than or equal to the connection distance x4 between the printed circuit board 103 and the binding portion 13 of the first display panel 101, the connection length between the second display panel 102 and the printed circuit board 103 can be shortened, the signal transmission loss can be reduced, and the material cost can be saved.

[0071] Reference Figure 8 In some embodiments of the present disclosure, the printed circuit board 103 has no contact with the first display panel 101 and the second display panel 102. Therefore, the influence of the heating of the first display panel 101 and the second display panel 102 on the printed circuit board 103 can be avoided, and the electromagnetic interference between the printed circuit board 103 and the first display panel 101 and the second display panel 102 can also be reduced.

[0072] It should be noted that the printed circuit board 103 can also be arranged on the side of the first display panel 101 or the second display panel 102 away from the light emitting side, but with a certain distance from the first display panel 101 or the second display panel 102, so that the printed circuit board 103 is shielded by the first display panel 101 or the second display panel 102 to avoid affecting the aesthetics of the display wall.

[0073] Figure 9a and Figure 9b According to some embodiments of the present disclosure, the display module is Figure 1 Cross-sectional view along the A-A' direction.

[0074] Reference Figure 9a In some embodiments of the present disclosure, at least one of the first display panel 101 and the second display panel 102 includes a touch electrode layer. That is, the touch electrode layer can be integrated into at least one of the first display panel 101 and the second display panel 102, and the touch signal can be transmitted through the binding part 13 (refer to Figure 1 ) transmission, no additional touch circuit board is required, and the overall thickness of the display module is reduced.

[0075] It should be noted that in this embodiment, the touch electrode layer may be integrated only on the first display panel 101 , may be integrated only on the second display panel 102 , or may be integrated on both the first display panel 101 and the second display panel 102 . Figure 9aIn the figure, the touch electrode layer is integrated into the first display panel 101 and the second display panel 102 as an example. Specifically, the touch electrode layer is divided into a first touch electrode layer 1011 and a second touch electrode layer 1021. The first touch electrode layer 1011 is integrated into the first display panel 101, and the second touch electrode layer 1021 is integrated into the second display panel 102. For example, the first touch electrode layer 1011 is arranged on the packaging layer of the first display panel 101, and the second touch electrode layer 1021 is arranged on the packaging layer of the second display panel 102.

[0076] It should be noted that in other embodiments, both the first display panel 101 and the second display panel 102 may not have a touch function, or one of the first display panel 101 and the second display panel 102 may have a touch function and the other may not have a touch function. The embodiments of the present disclosure are not limited to this.

[0077] In some embodiments of the present disclosure, a first protective film 401 and a first supporting layer 301 are further provided on a side of the first display panel 101 away from the light emitting side, and a first polarizing layer 501 is further provided on a side of the first display panel 101 close to the light emitting side. A second protective film 402 and a second supporting layer 302 are further provided on a side of the second display panel 102 away from the light emitting side, and a second polarizing layer 502 is further provided on a side of the second display panel 102 close to the light emitting side. The display module further includes a cover plate 600, which is bonded to the first polarizing layer 501 through a first optical adhesive portion 701 and to the second polarizing layer 502 through a second optical adhesive portion 702. That is, the first display panel 101 and the second display panel 102 share a cover plate 600, which can improve the overall aesthetics of the display module, make the display wall more visually coherent, and enhance the audience's immersive experience.

[0078] Reference Figure 9b In some embodiments of the present disclosure, the display module further includes a first touch layer 801 and a first touch circuit board 8011, the orthographic projection of the first display panel 101 on the first touch layer 801 is located in the first touch layer 801, and the first touch layer 801 is connected to the first touch circuit board 8011; and / or, the display module further includes a second touch layer 802 and a second touch circuit board 8021, the orthographic projection of the second display panel 102 on the second touch layer 802 is located in the second touch layer 802, and the second touch layer 802 is connected to the second touch circuit board 8021. That is, a touch layer is separately arranged outside the display panel, and a touch signal is transmitted to the touch layer through the touch circuit board, and one end of the touch circuit board away from the touch layer is connected to a printed circuit board or to a main controller outside the display module. Since the touch layer is arranged outside the display panel, it is convenient for production and maintenance.

[0079] It should be noted that in this embodiment, the first touch layer 801 may be provided only outside the first display panel 101, the second touch layer 802 may be provided only outside the second display panel 102, or the first touch layer 801 may be provided outside the first display panel 101 and the second touch layer 802 may be provided outside the second display panel 102. Figure 9b In the figure, a first touch layer 801 is provided outside the first display panel 101 and a second touch layer 802 is provided outside the second display panel 102 as an example. The first touch layer 801 is bonded to the first polarizing layer 501 through the third optical adhesive part 901, and the cover plate 600 is bonded to the first touch layer 801 through the first optical adhesive part 701; the second touch layer 802 is bonded to the second polarizing layer 502 through the fourth optical adhesive part 902, and the cover plate 600 is bonded to the second touch layer 802 through the second optical adhesive part 702.

[0080] Figure 10a to Figure 10e According to some embodiments of the present disclosure, the display module is Figure 1 Cross-sectional view along the A-A' direction.

[0081] Reference Fig.10a In some embodiments of the present disclosure, the display module further includes a polarizing layer 500, which is located at the light-emitting side of the first display panel 101 and the second display panel 102, and the orthographic projections of the first display panel 101 and the second display panel 102 on the polarizing layer 500 are located within the polarizing layer 500. That is, the first display panel 101 and the second display panel 102 share a polarizing layer 500, so a process of attaching the polarizing layer can be saved, thereby improving production efficiency.

[0082] Reference Fig.10b In some embodiments of the present disclosure, the display module further includes a cover plate 600, and the cover plate 600 is bonded to a side of the polarizing layer 500 away from the first display panel 101 and the second display panel 102 through an optical adhesive layer 700. In this embodiment, a whole layer of optical adhesive layer 700 is disposed between the cover plate 600 and the polarizing layer 500, thereby saving a process of attaching optical adhesive and improving production efficiency.

[0083] In some embodiments, continue to refer to Fig.10a, the cover plate 600 is bonded to the side of the polarizing layer 500 away from the first display panel 101 and the second display panel 102 through the first optical adhesive part 701 and the second optical adhesive part 702, respectively. The orthographic projection of the first display panel 101 on the first optical adhesive part 701 is located in the first optical adhesive part 701, and the orthographic projection of the second display panel 102 on the second optical adhesive part 702 is located in the second optical adhesive part 702. In this embodiment, the cover plate 600 is bonded to the side of the polarizing layer 500 away from the first display panel 101 and the second display panel 102 through the first optical adhesive part 701 and the second optical adhesive part 702, respectively. Since the first optical adhesive part 701 and the second optical adhesive part 702 are attached separately, the difficulty of attachment can be reduced.

[0084] Reference Fig.10c In some embodiments of the present disclosure, the display module further includes a support layer 300, which is located on a side of the first display panel 101 and the second display panel 102 away from the light emitting side, and the orthographic projections of the first display panel 101 and the second display panel 102 on the support layer 300 are located within the support layer 300. That is, the first display panel 101 and the second display panel 102 share a support layer 300, so a process of attaching the support layer 300 can be saved, thereby improving production efficiency.

[0085] Reference Fig.10d In some embodiments of the present disclosure, the support layer 300 includes a first surface S1 and a second surface S2, the first surface S1 is close to the first display panel 101 and the second display panel 102, the second surface S2 is far away from the first display panel 101 and the second display panel 102, and a groove 31 is provided on the first surface S1 and / or the second surface S2. That is, the groove 31 may be provided only on the first surface S1, the groove 31 may be provided only on the second surface S2, or the groove 31 may be provided on both the first surface S1 and the second surface S2. Fig.10d In the figure, the groove 31 is provided on both the first surface S1 and the second surface S2 as an example. The groove 31 overlaps with the splicing area of ​​the first display panel 101 and the second display panel 102 (i.e., the area where the second light shielding portion 202 is located). In this embodiment, one or more grooves 31 can be provided on the supporting layer 300, and the groove 31 can be located on the first surface S1 of the supporting layer 300, or on the second surface S2 of the supporting layer 300, so that the stress generated when the supporting layer 300 is attached to the first display panel 101 and the second display panel 102 can be dispersed through the groove 31, thereby avoiding damage to the first display panel 101 and the second display panel 102 caused by stress concentration, and can also improve the shockproof effect of the display module.

[0086] Reference Fig.10eIn some embodiments of the present disclosure, the display module further includes a sealing portion 32, and the sealing portion 32 is located between the first display panel 101 and the second display panel 102. Specifically, the sealing portion 32 can be filled between the support layer 300 and the polarizing layer 500, and between the first display panel 101 and the second display panel 102, so as to improve the packaging performance of the first display panel 101 and the second display panel 102. For example, the sealing portion 32 is a waterproof glue. Further, the positive projection of the sealing portion 32 on the light shielding layer 20 is located in the second light shielding portion 202, that is, the second light shielding portion 202 can be used to shield the sealing portion 32, so that the sealing portion 32 is not limited to using a light-transmitting material. In addition, one end of the sealing portion 32 close to the support layer 300 can be located in the groove 31, so that the contact area between the sealing portion 32 and the support layer 300 becomes larger, which can enhance the bonding strength and stability of the sealing portion 32 and the support layer 300, make the stress distribution more uniform, and reduce the risk of stress concentration and local damage.

[0087] The present disclosure also provides a display device, including the display module as described above. For the specific structure of the display module, please refer to Figures 1 to 10e And related instructions will not be repeated here.

[0088] Although some embodiments according to the general inventive concept of the present disclosure have been illustrated and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display module, characterized in that: The display module at least includes: a first display panel; a second display panel, located on one side of the first display panel; and a printed circuit board, electrically connected to the first display panel and the second display panel respectively, The first display panel and the second display panel share the printed circuit board, and the display module also includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the printed circuit board, and the other end of the flexible circuit board is electrically connected to one of the first display panel and the second display panel.

2. The display module according to claim 1, characterized in that: At least one of the first display panel and the second display panel includes a display portion, a binding portion, and a bending portion connecting the display portion and the binding portion, the binding portion is bent to a side away from a light emitting side of the display portion through the bending portion, and the display module further includes a driving chip; and The driving chip is arranged on the binding portion; or The flexible circuit board includes a chip-on-chip film, the driving chip is disposed on the chip-on-chip film, and the chip-on-chip film is connected to the binding portion; or The flexible circuit board includes a flexible circuit board, the driving chip is arranged on the flexible circuit board, and the flexible circuit board is connected to the binding part.

3. The display module according to claim 1, characterized in that: At least one of the first display panel and the second display panel includes a display portion and a binding portion located on one side of the display portion, the flexible circuit board includes a chip-on-chip film and a driver chip located on the chip-on-chip film, the chip-on-chip film is connected to the binding portion, and the driver chip is bent through the chip-on-chip film to a side away from the light-emitting side of the display portion.

4. The display module according to claim 1, characterized in that: At least one of the first display panel and the second display panel includes a display portion and a binding portion located on one side of the display portion, the flexible circuit board includes a flexible circuit board and a driving chip located on the flexible circuit board, the flexible circuit board is connected to the binding portion, and the driving chip is bent through the flexible circuit board to a side away from the light emitting side of the display portion.

5. The display module according to any one of claims 2 to 4, characterized in that: The printed circuit board is in contact with a side of the first display panel away from the light emitting side, and a connection distance between a binding portion of the printed circuit board and the first display panel is less than or equal to a connection distance between a binding portion of the printed circuit board and the second display panel; or The printed circuit board contacts a side of the second display panel away from the light emitting side, and a connection distance between a binding portion of the printed circuit board and the second display panel is less than or equal to a connection distance between a binding portion of the printed circuit board and the first display panel; or The printed circuit board has no contact with either the first display panel or the second display panel.

6. The display module according to any one of claims 1 to 5, characterized in that: The display module further includes a light shielding layer, the light shielding layer is located at the light emitting side of the first display panel and the second display panel, and the light shielding layer includes a first light shielding portion, a second light shielding portion, and a third light shielding portion; The orthographic projection of the edge of the first display panel on the light shielding layer is located within the first light shielding portion and the second light shielding portion, and the orthographic projection of the edge of the second display panel on the light shielding layer is located within the second light shielding portion and the third light shielding portion; and The color of the second light shielding portion is different from the color of the first light shielding portion, and the color of the third light shielding portion is the same as the color of the first light shielding portion.

7. The display module according to any one of claims 1 to 5, characterized in that: At least one of the first display panel and the second display panel includes a touch electrode layer.

8. The display module according to any one of claims 1 to 5, characterized in that: The display module further includes a first touch layer and a first touch circuit board, the orthographic projection of the first display panel on the first touch layer is located in the first touch layer, and the first touch layer is connected to the first touch circuit board; and / or The display module further includes a second touch layer and a second touch circuit board. The orthographic projection of the second display panel on the second touch layer is located in the second touch layer. The second touch layer is connected to the second touch circuit board.

9. The display module according to any one of claims 1 to 5, characterized in that: The display module further includes a polarizing layer, which is located at the light emitting side of the first display panel and the second display panel, and the orthographic projections of the first display panel and the second display panel on the polarizing layer are located within the polarizing layer.

10. The display module according to claim 9, characterized in that: The display module also includes a cover plate, which is bonded to the side of the polarizing layer away from the first display panel and the second display panel through an optical adhesive layer; or, the cover plate is bonded to the side of the polarizing layer away from the first display panel and the second display panel through a first optical adhesive portion and a second optical adhesive portion respectively, and the orthographic projection of the first display panel on the first optical adhesive portion is located in the first optical adhesive portion, and the orthographic projection of the second display panel on the second optical adhesive portion is located in the second optical adhesive portion.

11. The display module according to any one of claims 1 to 5, characterized in that: The display module further includes a supporting layer, which is located on a side of the first display panel and the second display panel away from a light emitting side, and the orthographic projections of the first display panel and the second display panel on the supporting layer are located within the supporting layer.

12. The display module according to claim 11, characterized in that: The supporting layer includes a first surface and a second surface, the first surface is close to the first display panel and the second display panel, and the second surface is far away from the first display panel and the second display panel. A groove is arranged on the first surface and / or the second surface, and the groove overlaps with the splicing area of ​​the first display panel and the second display panel.

13. The display module according to claim 11, characterized in that: The display module further includes a sealing portion, and the sealing portion is located between the first display panel and the second display panel.

14. The display module according to claim 1, characterized in that: In a cross section perpendicular to the light emitting direction of the display module, an area of ​​the first display panel is not equal to an area of ​​the second display panel.

15. A display device, characterized in that: The display device comprises a display module according to any one of claims 1-14.

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