Display module and display device

Abstract

The application discloses a display module and a display device, which comprise a backlight module and a display panel arranged oppositely, the backlight module is located at least partially on a side of the display panel away from a light-out surface, the display panel comprises a binding area, the binding area is bound with a circuit board, the circuit board comprises a bending area, the circuit board is bent to the side of the display panel away from the light-out surface along the bending area; the backlight module comprises a back plate, the back plate comprises adjacent first and second areas, the first area comprises a first clamping groove, and an opening of the first clamping groove faces the side away from the light-out surface of the display panel; in a direction perpendicular to the light-out surface of the display panel, the second area at least partially overlaps with the bending area; further comprising a light-shielding structure located on the first and second areas, and the light-shielding structure is at least partially inserted into the first clamping groove and extends to the side of the back plate away from the display panel. The application solves the problem of light leakage at an outlet end of the circuit board.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to a display module and a display device. Background Technology

[0002] Currently, display technology has permeated all aspects of people's daily lives, and correspondingly, more and more materials and technologies are being used in displays. Display panels, as a crucial component of display devices, are used to realize the display function. Today, the mainstream display panels are mainly liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays. LCDs have advantages such as being thin and light, having low power consumption, and low radiation, and are widely used in various fields.

[0003] A liquid crystal display panel typically includes a color filter substrate and an array substrate arranged opposite each other, as well as a liquid crystal layer between the color filter substrate and the array substrate. The side of the color filter substrate closest to the array substrate has a black matrix and a color resist layer. The electric field between the pixel electrode and the common electrode in the display panel can deflect the liquid crystal molecules. After the liquid crystal molecules are deflected, the light generated by the backlight component will pass through the display panel. By adjusting the magnitude of the electric field, the degree of deflection of the liquid crystal molecules can be different. When the degree of deflection of the liquid crystal molecules is different, the light transmittance of the display panel is different, and the amount of light transmitted through the liquid crystal display panel by the backlight component is different, thereby realizing the display of images. COF stands for Chip on Film, which means that the driver chip IC is bonded to a flexible printed circuit board (FPC). In this connection method, the driver chip IC of the LCD panel does not need to go through any packaging form and is directly mounted on the flexible circuit board. It has high structural density, reduced size, and can be bent freely, reducing overall weight. After the flexible circuit board is bent, it is attached to the back of the backlight assembly. Assembly gaps need to be reserved on the left and right sides of the exit end of the flexible circuit board. Light-shielding adhesive is usually set here to prevent light leakage. However, due to the difficulty of applying light-shielding adhesive in the current technology, it is easy to misalign and wrinkle, and light leakage still exists.

[0004] Therefore, there is an urgent need to provide a display module and display device that can prevent light leakage at the exit end of the flexible circuit board. Summary of the Invention

[0005] In view of this, the present invention provides a display module and display device to prevent light leakage at the outlet end of the circuit board.

[0006] On one hand, the present invention provides a display module, including a backlight module and a display panel disposed opposite to each other, wherein the backlight module is at least partially located on the side of the display panel away from the light-emitting surface, wherein,

[0007] The display panel includes a bonding area, on which a circuit board is bonded. The circuit board includes a bending area, along which the circuit board is bent to the side of the display panel away from the light-emitting surface.

[0008] The backlight module includes a back plate, which includes an adjacent first region and a second region. The first region includes a first slot, the opening of which faces away from the light-emitting surface of the display panel. In a direction perpendicular to the light-emitting surface of the display panel, the second region at least partially overlaps with the bending region.

[0009] It also includes a light-shielding structure located in the first and second zones, and the light-shielding structure is at least partially inserted into the first slot and extends toward the side of the back panel away from the display panel.

[0010] On the other hand, the present invention also provides a display device including the above-described display module.

[0011] Compared with the prior art, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0012] In related technologies, one solution to prevent light leakage from the left and right sides of the flexible circuit board is to apply interference-fit light-shielding tape to both sides of the back panel of the backlight module before bonding the CFOG (Flexible PCB Bonded to Glass) to the backlight module. Because the light-shielding tape needs to be bent and applied, the application is difficult, affecting production efficiency. Furthermore, tension exists at the bends after application, and there is a risk of the light-shielding tape separating from the back panel after long-term storage or transportation, leading to light leakage. This invention first assembles the display panel and backlight module, then bends the circuit board to the back of the backlight module, and finally applies the light-shielding structure. Therefore, it avoids the problems of bending and applying the light-shielding tape, the difficulty of application, and the risk of the light-shielding tape separating from the back panel that exist in related technologies.

[0013] In related technologies, to prevent light leakage from the left and right sides of the flexible circuit board, the second solution adopted is to attach the CFOG to the backlight module and then apply light-shielding tape after bending the flexible circuit board. However, the application is difficult, the application cost is high, it is easy to misalign the application, the uneven bonding surface forms wrinkles that lead to the risk of light leakage, there is a risk of misalignment during the application process, and there is a risk of interference with the front shell of the whole machine assembly. In this invention, the back panel includes an adjacent first area and a second area. The first area includes a first slot, the opening of which faces away from the light-emitting surface of the display panel. In a direction perpendicular to the light-emitting surface of the display panel, the second area overlaps at least partially with the bending area. A light-shielding structure is located in the first and second areas, and the light-shielding structure is at least partially inserted into the first slot and extends towards the side of the back panel away from the display panel. The light-shielding structure is an integral structure, and the insertion of the light-shielding structure into the first slot is a plug-in type of light-shielding structure. The first slot serves to limit the light-shielding structure and can prevent the light-shielding structure from shifting during attachment. After the plug-in type of light-shielding structure is attached, the light-shielding structure is located in the first and second areas, completely covering the circuit board and the first areas on both sides of the circuit board. The light inside the backlight cannot pass through, completely solving the light leakage problem.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0015] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0017] Figure 1 This is a front view of a display module provided by the present invention;

[0018] Figure 2 This is a rear view of a display module provided by the present invention;

[0019] Figure 3 yes Figure 2 A magnified view of a portion of region M in the middle;

[0020] Figure 4 yes Figure 2 A cross-sectional view along the A-A' direction in the middle;

[0021] Figure 5 yes Figure 2 A cross-sectional view along the B-B' direction;

[0022] Figure 6 yes Figure 2 Another cross-sectional view along the A-A' direction;

[0023] Figure 7 yes Figure 2 Another cross-sectional view along the A-A' direction;

[0024] Figure 8 yes Figure 2 Another cross-sectional view along the A-A' direction;

[0025] Figure 9 yes Figure 2 Another magnified view of region M in the image;

[0026] Figure 10 This is a schematic diagram of a planar structure of a light-shielding structure provided by the present invention;

[0027] Figure 11 This is a schematic diagram of a planar structure of a light-shielding structure provided by the present invention;

[0028] Figure 12 yes Figure 11 A cross-sectional view along the C-C' direction;

[0029] Figure 13 yes Figure 2 Another cross-sectional view along the A-A' direction;

[0030] Figure 14 yes Figure 13 A magnified view of a portion of region N in the middle;

[0031] Figure 15 yes Figure 2 Another cross-sectional view along the B-B' direction;

[0032] Figure 16 This is a schematic diagram of the planar structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] Given the light leakage issue at the flexible circuit board (FPC) exit end of the display module in related technologies, the inventors conducted the following research: Since assembly gaps need to be reserved at both ends of the flexible circuit board, light leakage occurs on both sides. Two solutions exist to prevent light leakage in related technologies. First, before bonding the CFOG (Flexible Printed Circuit Board) to the backlight module, interference-fit light-shielding tape is applied to both sides of the backplate of the backlight module. However, this requires bending and application, which is difficult and affects production efficiency. Furthermore, tension exists at the bend after application, and prolonged storage or transportation may cause the tape to separate from the backplate, leading to light leakage. Second, light-shielding tape is applied after bonding the CFOG to the backlight module and bending the FPC. However, this method is difficult, costly, prone to misalignment, and prone to uneven bonding surfaces causing wrinkles and light leakage. Misalignment during application also poses a risk of interference during the assembly of the entire device's front casing.

[0039] In view of this, the present invention provides a display module and display device that can prevent misalignment of the light-shielding adhesive and wrinkles caused by uneven adhesion of the light-shielding adhesive. Specific embodiments of the display module will be described in detail below.

[0040] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 This is a front view of a display module provided by the present invention. Figure 2 This is a rear view of a display module provided by the present invention. Figure 3 yes Figure 2 A magnified view of a portion of region M. Figure 4 yes Figure 2 A cross-sectional view along the A-A' direction in the diagram. Figure 5 yes Figure 2A cross-sectional view along the B-B' direction. This embodiment provides a display module 100, including a backlight module 20 and a display panel 10 disposed opposite to each other. The backlight module 20 is at least partially located on the side of the display panel 10 away from the light-emitting surface. The display panel 10 includes a bonding area BD, on which a circuit board 30 is bonded. The circuit board 30 includes a bending area 301, and the circuit board 30 is bent along the bending area 301 to the side of the display panel 10 away from the light-emitting surface. The backlight module 20 includes a back plate 201, which includes an adjacent first area 201a and a second area 201b. The first area 201a includes a first slot 50, the opening of which faces the side away from the light-emitting surface of the display panel 10. In a direction perpendicular to the light-emitting surface of the display panel 10, the second area 201b at least partially overlaps with the bending area 301. The backlight module 20 also includes a light-shielding structure 40 located in the first area 201a and the second area 201b, and the light-shielding structure 40 is at least partially inserted into the first slot 50 and extends toward the side of the back plate 201 away from the display panel 10.

[0041] Specifically, this embodiment only uses a liquid crystal display panel as an example for illustrative purposes, and does not specifically limit the type of display panel 10. Optionally, the display module 100 includes a display panel 10 and a backlight module 20 arranged opposite to each other. The backlight module 20 provides backlight for the display panel 10. Optionally, the display panel 10 in this embodiment may include a color filter substrate 4 and an array substrate 5 arranged opposite to each other, and liquid crystal molecules sandwiched between the color filter substrate 4 and the array substrate 5. The electric field between the pixel electrode and the common electrode can deflect the liquid crystal molecules. After the liquid crystal molecules are deflected, the light generated by the backlight component will pass through the display panel 10. By adjusting the magnitude of the electric field, the degree of deflection of the liquid crystal molecules can be different. When the degree of deflection of the liquid crystal molecules is different, the transmittance of the display panel 10 is different. The backlight component passes through the liquid crystal display panel 10. Different light levels enable image display. The glass substrate of the color filter substrate 4 is smaller than the glass substrate of the array substrate 5 at the bottom bezel, creating a stepped area between the color filter substrate 4 and the array substrate 5. This stepped area includes a bonding area BD, which contains pads (not shown in the figure). The pads are typically made of a highly conductive metal. The pads connect to the traces in the display area to transmit electrical signals, and also bond to the circuit board 30. The circuit board 30 is bonded to the bonding area BD of the display panel 10. The circuit board 30 is bent along the bending area 301 to the side of the display panel 10 away from the light-emitting surface, where the driver chip is placed. This further saves space and achieves a narrow bezel. Optionally, the circuit board 30 is a flexible circuit board. Flexible circuit boards can be made with polyimide or polyester film as the substrate, possessing flexibility, high wiring density, light weight, and thinness. Optionally, a cover plate 1 is included on the side of the display panel 10 away from the backlight module 20. The display panel 10 includes opposing color filter substrates 4 and array substrates 5. Liquid crystal molecules (not shown in the figure) are also included between the color filter substrates 4 and array substrates 5. The specific film layers of the color filter substrates 4 and array substrates 5 are not shown in the figure. An upper polarizer 3 is included on the side of the color filter substrate 4 away from the array substrate 5, and a lower polarizer 6 is included on the side of the array substrate 5 away from the color filter substrate 4. The cover plate 1 is fixed to the display panel 10 by optical adhesive 2, that is, the cover plate 1 and the upper polarizer 3 are bonded together by optical adhesive 2. A dustproof foam 7 is also included between the display panel 10 and the backlight module 20. The backlight module 20 includes a back plate 201, which can be integrally formed, for example, it can be a die-cast part, without specific limitations. Optionally, the back plate 201 is made of metal material, which not only improves the mechanical strength of the entire frame of the backlight module 20, but also improves heat dissipation performance. The back plate 201 can be manufactured by casting.The backplate 201 has a receiving space, within which an optical film is provided. Optionally, a reflective polarizing brightness enhancement film 8, a brightness enhancement film 9, a diffusion film 11, a light guide plate 12, and a reflective film 13 are sequentially arranged in the direction from the display panel 10 to the backlight module 20. A limiting light guide plate rubber 14 is also provided within the receiving space. The backplate 201 and the cover plate 1 are glued and fixed together by double-sided adhesive 15. This embodiment is only illustrated using a liquid crystal display panel as an example. It should be noted that the present invention is also applicable to OLED and Mini / Micro LED. For example, a flexible circuit board is bound in the lower bezel of an OLED display panel or a Mini / Micro LED display panel. The flexible circuit board is bent to the back of the display panel. If there is a light leakage problem at the bend of the flexible circuit board, a first slot can be provided in the housing. The light-shielding structure is inserted into the first slot and then pasted onto the back of the housing to prevent light leakage.

[0042] Figure 3 The structure of the back panel 201 is not shown in the diagram, but the light-shielding structure 40 is not shown. Figure 3 This is a partial enlarged view of the back of the display module. The back panel 201 includes adjacent first area 201a and second area 201b. In the direction perpendicular to the light-emitting surface of the display panel 10, the second area 201b at least partially overlaps with the bending area 301. Before the light-shielding structure 40 is attached, the bonding area BD of the display panel 10 is bonded to the circuit board 30. The circuit board 30 is bent along its bending area 301 to the side of the display panel 10 away from the light-emitting surface. Specifically, the circuit board 30 is attached backwards to the back panel 201 of the backlight module 20. A notch is formed in the back panel 201 at the edge position. The position corresponding to this notch is the second area 201b. This notch is used for the circuit board 30 to be bent and then attached backwards to the back panel 201. Of course, this notch corresponds to the exit end of the circuit board 30. The exit end of the circuit board 30 is prone to light leakage. The above two problems exist in the setting of the light-shielding structure in related technologies, which will not be elaborated here. In this invention, the first region 201a refers to the position adjacent to the second region 201b, and does not represent all positions other than the second region 201b. There is one first region 201a on each of the left and right sides of the second region 201b. Figure 3 , Figure 4 and Figure 5 The first zone 201a includes a first slot 50, the opening of which faces away from the light-emitting surface of the display panel 10. A light-shielding structure 40 is located in the first zone 201a and the second zone 201b. The light-shielding structure 40 is at least partially inserted into the first slot 50 and extends towards the back plate 201 away from the display panel 10. The first slot 50 is used to position the light-shielding structure 40, thereby avoiding the risk of light leakage caused by positional displacement of the light-shielding structure 40 or uneven adhesive surface forming wrinkles.

[0043] The assembly process of the display module of the present invention is as follows:

[0044] S1, Assemble the backlight module 20: Provide a back plate 201, and assemble the reflective film 13, light guide plate 12, side-lit light source (not shown in the figure), diffuser 11, brightness enhancement film and reflective polarizing brightness enhancement film 8, as well as the middle sheet metal 202 and dustproof foam 7 in sequence in the accommodating space of the back plate 201.

[0045] S2, Assemble the CFOG, provide the display panel 10, attach the upper polarizer 3 and the lower polarizer 6, attach the circuit board 30 in the bonding area BD of the display panel 10, and attach the display panel 10 to the cover plate 1 using optical adhesive 2.

[0046] S3, the backlight module 20 and CFOG are bonded together to form a display module 100 using double-sided adhesive 15, and the circuit board 30 is bent along the bending area 301 to the back of the backlight module 20 for bonding.

[0047] S4, the light-shielding structure 40 includes:

[0048] S401, a light-shielding structure 40 is provided, which corresponds to the first region 201a and the second region 201b;

[0049] S402, the light-shielding structure 40 is aligned with the first slot 50, the light-shielding structure 40 is inserted into the first slot 50 on the left and right sides and is snapped into the bottom of the first slot 50, and the light-shielding structure 40 is attached to the bottom of the back plate 201 so that the light-shielding structure 40 covers the circuit board 30 of the first area 201a and the second area 201b.

[0050] Compared with related technologies, the display module 100 of this embodiment has at least the following beneficial effects:

[0051] In related technologies, one solution to prevent light leakage from the left and right sides of the flexible circuit board is to apply interference-fit light-shielding tape to both sides of the back panel of the backlight module before bonding the CFOG (flexible circuit board bonded to glass) to the backlight module. However, this method is difficult due to the need for bending and applying the tape, impacting production efficiency. Furthermore, the tension at the bend after application poses a risk of the tape separating from the back panel after prolonged storage or transportation, leading to light leakage. In this embodiment, the display panel 10 and backlight module 20 are assembled first, then the circuit board 30 is bent to the back of the backlight module 20, and finally the light-shielding structure 40 is bonded. Therefore, the problems of bending and applying the light-shielding tape, the difficulty of application, and the risk of the tape separating from the back panel as found in related technologies are eliminated.

[0052] In related technologies, to prevent light leakage from the left and right sides of flexible circuit boards, a second solution is used: CFOG and backlight module bonding machine bend the flexible circuit board and then apply light-shielding tape. However, this method is difficult to apply, costly, prone to misalignment, and uneven bonding surfaces can lead to wrinkles and light leakage risks. Furthermore, the application process can result in misalignment, and there is a risk of interference when assembling the front shell of the entire device. In this embodiment, the backplate 201 includes adjacent first areas 201a and second areas 201b. The first area 201a includes a first slot 50, the opening of which faces away from the light-emitting surface of the display panel 10. In a direction perpendicular to the light-emitting surface of the display panel 10, the second area 201b at least partially overlaps with the bending area 301. The light-shielding structure 40 is located in the first area 201a and the second area 201b, and at least partially inserts into the first slot 50 and extends towards the backplate 201 away from the display panel 10. The light-shielding structure 40 is an integral structure. The light-shielding structure 40 is inserted into the first slot 50 in a plug-in type. The first slot 50 serves to limit the light-shielding structure 40 and prevent it from being misaligned during attachment. After the plug-in type attachment of the light-shielding structure 40, the light-shielding structure 40 is located in the first area 201a and the second area 201b, completely covering the circuit board 30 and covering the first area 201a on both sides of the circuit board 30. Light inside the backlight module 20 cannot pass through, thus completely solving the light leakage problem.

[0053] In some alternative embodiments, reference continues to be made to... Figure 3 , Figure 4 and Figure 5 and reference Figure 6 , Figure 6 yes Figure 2 Another cross-sectional view along the A-A' direction, to show the location of the first settling tank 20111, Figure 6 The light-shielding structure 40 is not shown in the diagram. The back plate 201 includes a bottom plate 2011 and a side plate 2012. The side plate 2012 is perpendicularly connected to the bottom plate 2011, and the side plate 2012 and the bottom plate 2011 form an accommodating space.

[0054] The first area 201a, the base plate 2011 includes a first recess 20111 recessed toward the display panel 10, and the light-shielding structure 40 extends from the first slot 50 to the first recess 20111.

[0055] Specifically, in combination Figure 2 and Figure 4The side plate 2012 includes a first side plate, a second side plate 20121, a third side plate 20123, and a fourth side plate 20124. The first side plate 20121 and the second side plate 20122 are located on opposite sides of the bottom plate 2011 along the first direction X, and the third side plate 20123 and the fourth side plate 20124 are located on opposite sides of the bottom plate 2011 along the second direction Y. A receiving cavity is formed between the bottom plate 2011, the first side plate 20121, the second side plate 20122, the third side plate 20123, and the fourth side plate 20124. The first direction X and the second direction Y intersect.

[0056] Reference Figure 6 In the first area 201a, the base plate 2011 includes a first recess 20111 recessed towards the side of the display panel 10. The first recess 20111 refers to the recess on the surface of the base plate 2011 towards the light-emitting surface of the display panel 10, forming a pit. When the light-shielding structure 40 is attached, the light-shielding structure 40 extends from the first slot 50 to the first recess 20111 and is attached to the first recess 20111. This ensures that the surface of the light-shielding structure 40 away from the display panel 10 is flat, and when it is attached to the base plate 2011, there will be no uneven adhesive surface that causes wrinkles and the risk of light leakage, thus further preventing light leakage.

[0057] In some alternative embodiments, refer to Figure 7 and Figure 8 , Figure 7 yes Figure 2 Another cross-sectional view along the A-A' direction in the diagram. Figure 8 yes Figure 2 Another cross-sectional view along the A-A' direction, to show the location of the first settling tank 20111, Figure 7 The light-shielding structure 40 is not shown. In the direction from the side plate 2012 to the center of the bottom plate 2011, the depth of the first recess 20111 gradually decreases in the direction perpendicular to the light-emitting surface of the display panel 10.

[0058] Specifically, along the second direction, that is, from the side plate 2012 toward the center of the bottom plate 2011, the depth of the first recess 20111 gradually decreases, that is, the height of the recess of the surface of the bottom plate 2011 toward the display panel 10 gradually decreases, so that the first recess 20111 forms an arc-shaped gentle slope. When attaching the light-shielding structure 40, after the light-shielding structure 40 is inserted into the first slot 50, the light-shielding structure 40 can be attached along the arc-shaped gentle slope. The surface of the light-shielding structure 40 away from the display panel 10 is flatter and easier to attach.

[0059] In some alternative embodiments, reference continues to be made to... Figure 3 , Figure 4 and Figure 6The first area 201a also includes a brim 2013 and a post 2014. The brim 2013 is perpendicularly connected to the side plate 2012 and is located on the side of the side plate 2012 away from the bottom plate 2011. The post 2014 is perpendicularly connected to the brim 2013 and has a first gap 2015 between the post 2014 and the side plate 2012 to form a first slot 50.

[0060] Specifically, the brim 2013 is set parallel to the base plate 2011 on the outer edge of the side plate 2012. The brim 2013 is perpendicular to the side plate 2012 and located on the side of the side plate 2012 away from the base plate 2011. The post 2014 is parallel to the side plate 2012 and perpendicular to the brim 2013. The first gap 2015 between the post 2014 and the side plate 2012 forms a first slot 50. The semi-open space formed by the post 2014, the brim 2013, and the side plate 2012 forms a first slot 50. The side of the first slot 50 near the second area 201b is open. The side furthest from the display panel 10 is an opening, allowing the light-shielding structure 40 to be at least partially inserted into the first slot 50 while ensuring that the light-shielding structure 40 is simultaneously located in the first zone 201a and the second zone 201b. The first slot 50 serves to limit the light-shielding structure 40, preventing it from shifting during attachment. The light-shielding structure 40 is located in the first zone 201a and the second zone 201b, completely covering the circuit board 30 and the first zone 201a on both sides of the circuit board 30. Light inside the backlight module 20 cannot pass through, completely solving the light leakage problem.

[0061] In some alternative embodiments, reference continues to be made to... Figure 3 , Figure 4 , Figure 6 and Figure 7 In the direction perpendicular to the plane of the display panel 10, the height of the baffle 2014 is less than the height of the side panel 2012.

[0062] It is understandable that the baffle 2014, together with the brim 2013 and the side panel 2012, forms a first slot 50, into which the light-shielding structure 40 is inserted. The first slot 50 serves to limit the movement of the light-shielding structure 40. If the height of the baffle 2014 is greater than or equal to the height of the side panel 2012 in a direction perpendicular to the plane of the display panel 10, a certain amount of time will be required between the baffle 2014 and the side panel 2012 to position the first slot 50 when inserting the light-shielding structure 40, which is not conducive to inserting the light-shielding structure 40 into the first slot 50. In this embodiment, the height of the baffle 2014 is less than the height of the side plate 2012 in the direction perpendicular to the plane of the display panel 10, which facilitates quick positioning in the first slot 50. Moreover, when inserting the light-shielding structure 40, the light-shielding structure 40 can be inserted into the first slot 50 simply by following the side plate 2012, without needing to find the positioning between the baffle 2014 and the side plate 2012, thus enabling efficient insertion of the light-shielding structure 40.

[0063] In some alternative embodiments, refer to Figure 9 , Figure 9 yes Figure 2 Another magnified view of region M in the image shows that, along the direction from region 201a to region 201b, the width m1 of the first slot 50 is greater than the width m2 of the first sink 20111.

[0064] It is understandable that, along the direction from the first region 201a to the second region 201b, a larger width m1 of the first slot 50 makes it easier to position the first slot 50 and insert the light-shielding structure 40 into it. In this embodiment, along the direction from the first region 201a to the second region 201b, the width m1 of the first slot 50 is greater than the width m2 of the first recess 20111, which further facilitates the insertion of the light-shielding structure 40 into the first slot 50.

[0065] Furthermore, to ensure a smoother surface after the light-shielding structure 40 is adhered to the back panel 201, the shape of the light-shielding structure 40 can be modified, with protrusions 404 formed at the bottom corners of the light-shielding structure 40, in conjunction with reference to... Figure 9 and Figure 10 , Figure 10 This is a schematic diagram of a planar structure of a light-shielding structure provided by the present invention. The protrusion 404 corresponds to the portion where the width m1 of the first slot 50 is greater than the width m2 of the first recess 20111. That is, along the direction from the first region 201a to the second region 201b, the width of the protrusion 404 is equal to m1-m2. Thus, after the light-shielding structure 40 is inserted into the first slot 50 and attached to the first recess 20111, there will be no excess light-shielding structure 40 exposed outside the areas of the first region 201a and the second region 201b.

[0066] In some alternative embodiments, reference continues to be made to... Figure 3 and Figure 9 The width of the first slot 50 is 1mm-2mm in the direction from the first zone 201a to the second zone 201b.

[0067] The instruction manual requires that the width of the first slot 50 in the direction from the first zone 201a to the second zone 201b should not be too large or too small. If the width of the first slot 50 is too small, it will be difficult to position the first slot 50, and the light-shielding structure 40 will not be able to be quickly inserted into the first slot 50. If the width of the first slot 50 is too large, then the width of the stop post 2014 that needs to be set will also need to be too large, and then the space occupied by the first zone 201a will be larger, occupying the space on the side of the first zone 201a away from the second zone 201b. The side of the first zone 201a away from the second zone 201b originally needs to be set with other structures, such as the sheet metal slot 20121. Therefore, the width of the first slot 50 in the direction from the first zone 201a to the second zone 201b should not be too large.

[0068] In this embodiment, the width of the first slot 50 is 1mm-2mm along the direction from the first area 201a to the second area 201b. Optionally, the width of the first slot 50 can be 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm or 2mm, or any value between 1mm and 2mm. No specific limitation is made here. This is conducive to locating the first slot 50 and quickly inserting the light-shielding structure 40 into the first slot 50, without causing the width of the first slot 50 to be too large and affecting the structure that originally needed to be set on the side of the first area 201a away from the second area 201b.

[0069] In some alternative embodiments, reference continues to be made to... Figure 3 , Figure 4 and Figure 9 The back panel 201 includes a bottom panel 2011 and a side panel 2012. The side panel 2012 is perpendicularly connected to the bottom panel 2011, and the side panel 2012 and the bottom panel 2011 form an accommodating space.

[0070] The backlight module 20 also includes a middle sheet metal 202, which is located between the back panel 201 and the display panel 10; the side panel 2012 includes a plurality of middle sheet metal slots 20121, which engage with the middle sheet metal 202, and one of the middle sheet metal slots 20121 is located on the side of the first area 201a away from the second area 201b.

[0071] It is understandable that the middle sheet metal 202 and the back plate 201 are assembled and cooperate to form the overall frame structure of the backlight module 20, which can limit, support and protect the optical film layers in the backlight module 20. In this embodiment, the connection between the middle sheet metal 202 and the back plate 201 is by snap-fit. Specifically, the back plate 201 has a side plate 2012, and multiple middle sheet metal slots 20121 are provided on the side plate 2012. The middle sheet metal 202 can be snapped into the middle sheet metal slots 20121. In related technologies, a middle sheet metal slot 20121 is originally provided on the side of the first area 201a away from the second area 201b. Therefore, the width of the first slot 50 in the direction from the first area 201a to the second area 201b cannot be too large, so as not to affect the setting of the middle sheet metal slot 20121 and cause the connection between the middle sheet metal 202 and the side plate 2012 to be unstable.

[0072] In some alternative embodiments, refer to Figure 11 , Figure 12 , Figure 13 and Figure 14 , Figure 11 This is a schematic diagram of a planar structure of a light-shielding structure provided by the present invention. Figure 12 yes Figure 11 A cross-sectional view along the C-C' direction. Figure 13 yes Figure 2 Another cross-sectional view along the A-A' direction in the diagram. Figure 14 yes Figure 13 A partial enlarged view of region N. The light-shielding structure 40 includes a light-shielding layer 401, an adhesive layer 402, and a release layer 403. The adhesive layer 402 is bonded to the light-shielding layer 401, and the release layer 403 is located on the side of the adhesive layer 402 away from the light-shielding layer 401, and the release layer 403 is located at least within the first slot 50.

[0073] like Figures 11 to 14 As shown, the light-shielding structure 40 sequentially includes a light-shielding layer 401, an adhesive layer 402, and a release layer 403. Optionally, the material of the light-shielding layer 401 can be black film PET (polyethylene terephthalate), the material of the adhesive layer 402 can be acrylic adhesive, and the material of the release layer 403 can be PET. Optionally, the thickness of the release layer 403 is about 50 μm.

[0074] The light-shielding structure 40 of the display module 100 typically does not have a release layer. Before attaching the light-shielding structure 40, the release layer 403 is removed, and the adhesive layer 402 is attached to the first area 201a and the second area 201b. In this embodiment, the release layer 403 is not removed at the position corresponding to the first slot 50. Optionally, a seam line is provided on the release layer 403 before attachment, with the seam line along the outer edge of the corresponding first slot 50. Then, the release layer 403 in the area outside the corresponding first slot 50 is removed, leaving the remaining release layer 403 in the light-shielding structure 40. When inserting the light-shielding structure 40, refer to... Figure 13 and Figure 14 Release layer 403 is located on the side closer to side panel 2012, and light-shielding layer 401 is located on the side closer to baffle 2014.

[0075] It is understandable that if the front part of the release layer 403 is removed, when the light-shielding structure 40 is pasted and inserted into the first slot 50, if there is a positional deviation, the adhesive layer 402 of the light-shielding structure 40 will directly adhere to the side plate 2012 because the release layer 403 is completely removed, and the position of the light-shielding structure 40 cannot be adjusted. In this embodiment, the release layer 403 is located at least within the first slot 50. Because there is a release layer 403 between the adhesive layer 402 and the side plate 2012, the adhesive layer 402 will not directly adhere to the side plate 2012. The position of the light-shielding structure 40 can be adjusted. After the light-shielding structure 40 is positioned, it is pasted, that is, the adhesive layer 402 is pasted to the first recess 20111 and the circuit board 30.

[0076] In some alternative embodiments, reference continues to be made to... Figure 11 and reference Figure 15 , Figure 15 yes Figure 2 Another cross-sectional view along the B-B' direction shows that, in the direction perpendicular to the light-emitting surface of the display panel 10, the release layer 403 does not overlap with the circuit board 30.

[0077] It is understandable that the adhesive layer 402 is bonded to the first recess 20111 and the second area 201b, thereby fixing the light-shielding structure 40. If the release layer 403 overlaps with the circuit board 30 in the direction perpendicular to the light-emitting surface of the display panel 10, that is, the adhesive layer 402 and the circuit board 30 are isolated by the release layer 403, then the connection between the light-shielding structure 40 and the back plate 201 will be unstable, and the light-shielding structure 40 will fall off as the display module 100 is used for a longer period of time. In this embodiment, the release layer 403 does not overlap with the circuit board 30 in the direction perpendicular to the light-emitting surface of the display panel 10, and the adhesive layer 402 is bonded to the circuit board 30, making the bonding of the light-shielding structure 40 more stable.

[0078] In some alternative embodiments, please refer to Figure 16 , Figure 16 This is a schematic diagram of a planar structure of a display device provided in an embodiment of the present invention. The display device 1000 provided in this embodiment includes the display module 100 provided in the above embodiment. Figure 16 This embodiment uses a mobile phone as an example to illustrate the display device 1000. It is understood that the display device 1000 provided in this embodiment can be any other display device 1000 with display functions, such as a computer, television, or vehicle-mounted display device; this invention does not impose specific limitations on this. The display device 1000 provided in this embodiment has the beneficial effects of the display module 100 provided in this embodiment. For details, please refer to the specific descriptions of the display module 100 in the above embodiments; these will not be repeated here.

[0079] As can be seen from the above embodiments, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0080] In related technologies, one solution to prevent light leakage from the left and right sides of the flexible circuit board is to apply interference-fit light-shielding tape to both sides of the back panel of the backlight module before bonding the CFOG (Flexible PCB Bonded to Glass) to the backlight module. Because the light-shielding tape needs to be bent and applied, the application is difficult, affecting production efficiency. Furthermore, tension exists at the bend after application, and after long-term storage or transportation, there is a risk of the light-shielding tape separating from the back panel at the bend, leading to light leakage. This invention first assembles the display panel and backlight module, then bends the circuit board to the back of the backlight module, and finally applies the light-shielding structure. Therefore, it avoids the problems of bending and applying the light-shielding tape, the difficulty of application, and the risk of the light-shielding tape separating from the back panel that exist in related technologies.

[0081] In related technologies, to prevent light leakage from the left and right sides of the flexible circuit board, the second solution adopted is to bend the flexible circuit board and apply light-shielding tape after using the CFOG and backlight module bonding machine. However, the application is difficult, the bonding cost is high, it is easy to misalign the application, the uneven bonding surface forms wrinkles that lead to the risk of light leakage, there is a risk of misalignment during the application process, and there is a risk of interference when assembling the front shell of the whole machine. In this invention, the back panel includes an adjacent first area and a second area. The first area includes a first slot, the opening of which faces away from the light-emitting surface of the display panel. In a direction perpendicular to the light-emitting surface of the display panel, the second area overlaps at least partially with the bending area. A light-shielding structure is located in the first and second areas, and the light-shielding structure is at least partially inserted into the first slot and extends towards the side of the back panel away from the display panel. The light-shielding structure is an integral structure, and the insertion of the light-shielding structure into the first slot is a plug-in type of light-shielding structure. The first slot serves to limit the light-shielding structure and can prevent the light-shielding structure from shifting during attachment. After the plug-in type of light-shielding structure is attached, the light-shielding structure is located in the first and second areas, completely covering the circuit board and the first areas on both sides of the circuit board. The light inside the backlight cannot pass through, completely solving the light leakage problem.

[0082] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display module, characterized in that, The display panel includes a backlight module and a display panel arranged opposite each other, wherein the backlight module is at least partially located on the side of the display panel away from the light-emitting surface. The display panel includes a bonding area, a circuit board is bonded to the bonding area, and the circuit board includes a bending area, the circuit board is bent along the bending area to the side of the display panel away from the light-emitting surface; The backlight module includes a back plate, which includes an adjacent first area and a second area. The circuit board is located in the second area. The first area includes a first slot, the opening of which faces away from the light-emitting surface of the display panel. In a direction perpendicular to the light-emitting surface of the display panel, the second area at least partially overlaps with the bending area. It also includes a light-shielding structure located in the first area and the second area, and the light-shielding structure is at least partially inserted into the first slot and extends toward the side of the back plate away from the display panel.

2. The display module according to claim 1, characterized in that, The back panel includes a bottom panel and a side panel, the side panel being perpendicularly connected to the bottom panel, and the side panel and the bottom panel forming an accommodating space; In the first area, the base plate includes a first recessed groove recessed towards the side of the display panel, and the light-shielding structure extends from the first slot to the first recessed groove.

3. The display module according to claim 2, characterized in that, In the direction from the side plate to the center of the base plate, the depth of the first recessed groove gradually decreases in the direction perpendicular to the light-emitting surface of the display panel.

4. The display module according to claim 2, characterized in that, The first area also includes a brim and a stop post. The brim is perpendicularly connected to the side plate and is located on the side of the side plate away from the bottom plate. The stop post is perpendicularly connected to the brim and has a first gap between it and the side plate to form the first slot.

5. The display module according to claim 4, characterized in that, In a direction perpendicular to the plane of the display panel, the height of the baffle is less than the height of the side plate.

6. The display module according to claim 4, characterized in that, Along the direction from the first area to the second area, the width of the first slot is greater than the width of the first sink.

7. The display module according to claim 4, characterized in that, Along the direction from the first area to the second area, the width of the first slot is 1mm-2mm.

8. The display module according to claim 1, characterized in that, The back panel includes a bottom panel and a side panel, the side panel being perpendicularly connected to the bottom panel, and the side panel and the bottom panel forming an accommodating space; The backlight module also includes a middle sheet metal, which is located between the back panel and the display panel; the side panel includes a plurality of middle sheet metal slots, which engage with the middle sheet metal slots, and one of the middle sheet metal slots is located on the side of the first area away from the second area.

9. The display module according to claim 1, characterized in that, The light-shielding structure includes a light-shielding layer, an adhesive layer, and a release layer. The adhesive layer is bonded to the light-shielding layer, and the release layer is located on the side of the adhesive layer away from the light-shielding layer, and the release layer is located at least within the first slot.

10. The display module according to claim 9, characterized in that, In the direction perpendicular to the light-emitting surface of the display panel, the release layer does not overlap with the circuit board.

11. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 10.

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