Backlight module and display device

Abstract

Embodiments of the present application provide a backlight module and a display device, and relate to the technical field of display, which aims to solve the problem of reduced utilization of light emitted from a diffusion plate due to the light emitted from the edge of the diffusion plate being blocked. The backlight module comprises a frame, a diffusion plate and a light guide piece. The frame comprises a first frame, which comprises a platform portion and a peripheral portion bently connected to one side of the platform portion; the diffusion plate comprises a main body portion and an edge portion connected to at least one side of the main body portion, and the edge portion is supported on the platform portion; the light guide piece is connected to the peripheral portion; wherein the light guide piece is located on the edge portion to abut against the edge portion towards the platform portion, and is adapted to guide the light emitted from the edge portion.

Description

Technical Field

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

[0002] As a key component of some display devices, the backlight module's light emission performance directly affects the image quality and display effect of the display device.

[0003] In related technologies, backlight modules typically include a frame, a diffuser plate, and an optical film mounted on the frame. However, in practical applications, to prevent the diffuser plate from moving vertically and pressing on the optical film, causing deformation or wrinkling and thus affecting the uniform distribution of light, a limiting component is usually installed to restrict the vertical movement of the diffuser plate. However, the installation of the limiting component can cause light emitted from the edge of the diffuser plate to be blocked, thereby reducing the utilization rate of the light emitted from the diffuser plate and affecting the light emission performance of the backlight module. Utility Model Content

[0004] This application provides a backlight module and display device to at least solve the problem in the related art where light emitted from the edge of the diffuser plate is blocked, thus reducing the utilization rate of light emitted from the diffuser plate.

[0005] On one hand, embodiments of this application provide a backlight module, the backlight module comprising:

[0006] The frame includes a first frame, the first frame including a platform portion and a peripheral portion bent and connected to one side of the platform portion;

[0007] A diffuser plate includes a main body and an edge portion connected to at least one side of the main body, the edge portion being supported on the platform portion; and

[0008] Light guide component, connected to the peripheral part;

[0009] The light guide is located on the edge portion to abut against the edge portion toward the platform portion, and is adapted to guide the light emitted from the edge portion.

[0010] In some embodiments, the backlight module further includes an optical film located on the light guide; wherein the light guide is adapted to guide light emitted from the edge toward the optical film.

[0011] In some embodiments, the light guide is a transparent light guide.

[0012] In some embodiments, the optical film is supported on the light guide.

[0013] In some embodiments, the size of the platform portion is larger than the size of the light guide along the length direction of the diffuser plate.

[0014] In some embodiments, a gap is provided between the peripheral portion and the edge portion, the gap being adapted to accommodate an adhesive for bonding the peripheral portion and the edge portion.

[0015] In some embodiments, the frame further includes a back plate, the back plate including a back plate bottom plate portion and a back plate side plate portion bent and connected to the back plate bottom plate portion; the first frame further includes a support portion, the support portion being bent and connected to the end of the platform portion away from the peripheral portion; wherein, the support portion is supported on the back plate bottom plate portion, and the peripheral portion is supported on the back plate side plate portion.

[0016] In some embodiments, the frame further includes a second frame connected to the outer side of the back panel side panel and the periphery.

[0017] In some embodiments, the backlight module further includes an optical film abutting between the light guide and the second frame.

[0018] On the other hand, embodiments of this application also provide a display device, which includes a backlight module as described in any of the above embodiments.

[0019] In the backlight module provided in this embodiment, the platform provides a large supporting surface for the diffuser plate, ensuring its installation stability. The light guide abuts against the edge portion on the side facing the platform, ensuring that opposite sides of the diffuser plate are contacted by the platform and the light guide, effectively preventing relative displacement of the diffuser plate in the vertical direction (i.e., the thickness direction of the diffuser plate). This prevents the diffuser plate from pressing against the optical film on one side and affecting the light emission uniformity of the backlight module. In other words, since the diffuser plate in this embodiment does not experience relative displacement in the vertical direction, it helps ensure the light emission uniformity of the backlight module. Furthermore, since the light guide can guide the light emitted from the edge portion, it prevents this light from being blocked and thus improves the utilization rate of the light emitted from the diffuser plate, thereby enhancing the light emission effect of the backlight module. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a top view of a display device provided in some embodiments of this application;

[0022] Figure 2 yes Figure 1 A sectional view along the A-A' direction;

[0023] Figure 3 This is a partial schematic diagram of a backlight module provided in some embodiments of this application;

[0024] Figure 4 yes Figure 3 Enlarged structural diagram of the middle part E. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0026] In the description of this application, it should be understood that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words mean two or more, unless otherwise expressly defined.

[0027] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0028] The use of “suitable for” or “used for” in this application implies open and inclusive language, which does not exclude the applicability to or configuration of devices to perform additional tasks or steps.

[0029] The various embodiments of this application are similar, and features from different embodiments and / or different examples can be combined with each other.

[0030] Some embodiments of this application provide a display device, such as... Figure 1 and Figure 2 As shown, Figure 1 This is a top view of the display device 1000. Figure 2 for Figure 1 A cross-sectional view along the A-A' direction. The display device 1000 includes a backlight module 100 and a display panel 200, with the display panel 200 disposed on the light-emitting side of the backlight module 100. The backlight module 100 provides a backlight source for the display panel 200 to display an image, and the display panel 200 receives the light from the backlight source to display the image.

[0031] In some embodiments, such as Figure 2 As shown, the backlight module 100 includes a frame 10, a diffuser plate 20, and a light guide 30.

[0032] The frame 10 includes a first frame 11, which includes a platform portion 111 and a peripheral portion 112 bent and connected to one side of the platform portion 111. For example, the platform portion 111 and the peripheral portion 112 can be perpendicular to each other. The diffuser plate 20 includes a main body portion 21 and an edge portion 22 connected to at least one side of the main body portion 21, with the edge portion 22 supported on the platform portion 111. The platform portion 111 can provide a large supporting plane for the diffuser plate 20, allowing the edge portion 22 to be positioned on the platform portion 111, thereby ensuring good installation stability of the diffuser plate 20. As an example, the edge portion 22 can be connected to the perimeter of the main body portion 21, thus utilizing the platform portion 111 of the frame 10 to provide good support for the diffuser plate 20, further ensuring the installation stability of the diffuser plate 20.

[0033] In addition, the light guide 30 is connected to the peripheral portion 112. The light guide 30 is located on the edge portion 22 to abut against the edge portion 22 toward the platform portion 111 and is adapted to guide the light emitted from the edge portion 22.

[0034] In the backlight module 100 provided in this embodiment, the platform portion 111 provides a large supporting plane for the diffuser plate 20 to ensure the installation stability of the diffuser plate 20. The light guide 30 abuts against the edge portion 22 on the side facing the platform portion 111, so that the opposite sides of the diffuser plate 20 are respectively abutted by the platform portion 111 and the light guide 30, thereby effectively preventing the diffuser plate 20 from undergoing relative displacement in the vertical direction (i.e., the thickness direction of the diffuser plate 20), and thus preventing the diffuser plate 20 from pressing on the optical film located on one side and affecting the light emission uniformity of the backlight module 100. In other words, since the diffuser plate 20 in this embodiment does not undergo relative displacement in the vertical direction, it is beneficial to ensure the light emission uniformity of the backlight module 100. In addition, since the light guide 30 can guide the light emitted from the edge portion 22, it can prevent this part of the light from being blocked and unable to be emitted, thereby improving the utilization rate of the light emitted from the diffuser plate 20, and thus improving the light emission effect of the backlight module 100.

[0035] It is worth noting that since the display device 1000 in this embodiment includes the backlight module 100, the display device 1000 has the technical effects corresponding to the backlight module 100. The technical effects of the display device 1000 will not be described again here or below.

[0036] In some embodiments, please continue reading Figure 2 The backlight module 100 also includes an optical film 40 located on the light guide 30, the light guide 30 being adapted to guide light emitted from the edge portion 22 toward the optical film 40.

[0037] In this embodiment, the light guide 30 can guide the light emitted from the edge 22 toward the optical film 40, allowing this light to be emitted under the modulation of the optical film 40, thereby effectively improving the light emission effect of the backlight module 100. Furthermore, since the optical film 40 is located on the light guide 30, and there is a certain distance between the optical film 40 and the diffuser plate 20, the problem of pressure easily occurring due to contact between the diffuser plate 20 and the optical film 40 can be effectively avoided, thus preventing the optical film 40 from being deformed or wrinkled due to pressure.

[0038] In some examples, the optical film 40 may include at least one of a brightness enhancement film, a polarizer, and a phase retardation film. The structure of the aforementioned film can be referred to the description in the prior art, and will not be repeated here.

[0039] In some examples, the light guide 30 is a transparent light guide. In this case, the light emitted from the edge 22 of the diffuser plate can be emitted towards the optical film 40 in roughly the original direction, thus effectively ensuring the uniformity of the light emission direction of the backlight module 100.

[0040] For example, the material of the light guide 30 may include polymethyl methacrylate (PMMA). PMMA has a light transmittance of over 92%, which can effectively reduce light loss when transmitted through the light guide 30.

[0041] Of course, the material of the light guide 30 may also include polycarbonate or optical-grade polystyrene, etc. This application does not impose any limitations on this.

[0042] In addition, the frame 10 is made of an opaque material, so that all the light emitted from the backlight module 100 passes through the optical film 40, thus ensuring the directional light emission effect of the backlight module 100.

[0043] In some examples, the optical diaphragm 40 is supported on the light guide 30. That is, the light guide 30 can provide effective support for the optical diaphragm 40, thereby ensuring the stable installation of the optical diaphragm 40.

[0044] In this case, the light guide 30 not only guides the light but also supports the optical film 40, which can improve the functionality of the light guide 30 and reduce the number of components used in the backlight module 100.

[0045] As an example, the top surface of the light guide 30 and the top surface of the outer periphery 112 of the first frame 11 are flush, and the optical film 40 can be directly mounted on the top surface of the light guide 30 and the outer periphery 112, thus providing a good support effect for the optical film 40.

[0046] In some embodiments, such as Figure 3As shown, along the length direction X of the diffuser plate 20, the first dimension D1 of the platform portion 111 is greater than the second dimension D2 of the light guide 30.

[0047] This design allows the platform portion 111 to have a relatively large flat surface that contacts the edge portion 22 of the diffuser plate 20, thereby providing good support for the diffuser plate 20 and preventing the diffuser plate 20 from easily collapsing, which could lead to uneven brightness in the light emitted from the backlight module 100. Furthermore, since the light guide 30 typically cannot completely transmit light, the above design allows for a relatively small size of the light guide 30, which helps to increase the light output of the backlight module 100.

[0048] As an example, one end of the light guide 30 is connected to the peripheral portion 112, and the other end of the light guide 30 does not extend beyond the platform portion 111, thereby ensuring that in the longitudinal direction X of the diffuser plate 20, the first dimension D1 of the platform portion 111 is greater than the second dimension D2 of the light guide 30.

[0049] In some embodiments, such as Figure 4 As shown, the platform portion 111 and the edge portion 22 are bonded together by an adhesive layer 51, which fixes the diffuser plate 20 to the frame 10 and prevents the diffuser plate 20 from shaking. For example, the adhesive layer 51 can be double-sided tape. Furthermore, the abutment of the light guide 30 above the edge portion 22 effectively prevents the diffuser plate 20 from detaching.

[0050] It is worth noting that, in this embodiment of the application, since the platform portion 111 has a large support surface to support the diffuser plate 20, and when the adhesive layer 51 is provided to bond the two together, the platform portion 111 and the edge portion 22 of the diffuser plate 20 also have a relatively large adhesive surface, thereby ensuring the connection stability between the diffuser plate 20 and the frame 10.

[0051] In some examples, there is a gap K between the peripheral portion 112 and the edge portion 22, which is adapted to accommodate an adhesive to bond the peripheral portion 112 and the edge portion 22.

[0052] In this case, the connection stability between the diffuser plate 20 and the frame 10 is further enhanced by filling the gap between the outer periphery 112 and the edge portion 22 with adhesive. For example, the adhesive can be double-sided tape.

[0053] In some examples, the diffuser 20 can be installed before the light guide 30. For instance, double-sided tape can be applied to at least one of the platform portion 111 and the peripheral portion 112; then the diffuser 20 is attached to the double-sided tape; and finally, the light guide 30 is fixed to the peripheral portion 112, thereby achieving the installation of both the diffuser 20 and the light guide 30. This allows for quick and stable installation of both the diffuser 20 and the light guide 30, resulting in reliable production yield.

[0054] In this embodiment, the light guide 30 is detachably connected to the peripheral portion 112. For example, the two can be connected by snap-fit ​​or adhesive. This improves the efficiency of assembling and disassembling the light guide 30.

[0055] It is worth noting that the light guide 30 is shown as a rectangle in the accompanying drawings of this application. However, in actual applications, the shape and size of the light guide 30 can be set as needed.

[0056] In some embodiments, please refer to Figure 2 The frame 10 also includes a back panel 12, which includes a back panel bottom plate portion 121 and a back panel side plate portion 122 that is bent and connected to the back panel bottom plate portion 121.

[0057] The first frame 11 also includes a support portion 113, which is bent and connected to the end of the platform portion 111 that is away from the outer periphery portion 112. The support portion 113 is supported on the bottom plate portion 121 of the back panel, and the outer periphery portion 112 is supported on the side plate portion 122 of the back panel.

[0058] In this configuration, the platform portion 111 and support portion 113 of the first frame 11, and the back plate bottom portion 121 and back plate side portion 122 of the back plate 12, can define a space. In some examples, a connector for connecting the first frame 11 and the back plate 12 can be provided within this space to fix the first frame 11 and the back plate 12 relatively. Of course, connectors can also be provided between the platform portion 111 and the back plate side portion 122, and between the support portion 113 and the back plate bottom portion 121, to fix the first frame 11 and the back plate 12 relatively. This application does not limit the specific connection method between the first frame 11 and the back plate 12.

[0059] In some examples, the backlight module 100 also includes a light-emitting element 61 disposed on the bottom plate portion 121 of the back panel. The light emitted by the light-emitting element 61 can be directed onto the display panel 200 after passing through the diffuser plate 20 and the optical film 40 in sequence. For example, the light-emitting element 61 can be an LED lamp bead.

[0060] In addition, a reflective sheet 62 can be provided on the bottom plate portion 121 of the back panel. The reflective sheet 62 can be used to direct as much light from the light-emitting element 61 toward the diffuser plate 20 as possible, thereby improving the light output brightness of the backlight module 100 and thus improving the display effect of the display device 1000.

[0061] A support column 63 is also provided between the main body 21 of the diffuser plate 20 and the bottom plate 121 of the back plate. The support column 63 can provide support for the main body 21 of the diffuser plate 20 to effectively prevent the main body 21 of the diffuser plate 20 from collapsing.

[0062] In some embodiments, please continue reading Figure 2 The frame 10 also includes a second frame 13, which is connected to the outer side of the back panel side panel portion 122 and the outer periphery portion 112. The second frame 13 can serve as the outer frame of the backlight module 100.

[0063] In some examples, the outer plane of the back panel side plate portion 122 and the outer plane of the peripheral portion 112 can be flush to facilitate the second frame 13 fitting with the two outer planes, thereby ensuring the overall flatness of the backlight module 100. Exemplarily, the second frame 13 can be bonded and fixed to the outer plane of the back panel side plate portion 122 and the outer plane of the peripheral portion 112.

[0064] In some examples, the optical film 40 of the backlight module 100 abuts between the light guide 30 and the second frame 13. This arrangement allows the second frame 13 to confine the optical film 40 and the light guide 30 within it, thus effectively protecting both.

[0065] In addition, foam can be provided between the display panel 20 and the second frame 13 to provide a certain degree of cushioning protection for the display panel 20.

[0066] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A backlight module, characterized in that, include: The frame includes a first frame, the first frame including a platform portion and a peripheral portion bent and connected to one side of the platform portion; A diffuser plate includes a main body and an edge portion connected to at least one side of the main body, the edge portion being supported on the platform portion; as well as Light guide component, connected to the peripheral part; The light guide is located on the edge portion to abut against the edge portion toward the platform portion, and is adapted to guide the light emitted from the edge portion.

2. The backlight module according to claim 1, characterized in that, The backlight module further includes an optical film located on the light guide; wherein the light guide is adapted to guide light emitted from the edge toward the optical film.

3. The backlight module according to claim 2, characterized in that, The light guide is a transparent light guide.

4. The backlight module according to claim 2, characterized in that, The optical film is supported on the light guide.

5. The backlight module according to claim 1, characterized in that, Along the length of the diffuser plate, the size of the platform portion is larger than the size of the light guide.

6. The backlight module according to any one of claims 1-5, characterized in that, There is a gap between the peripheral portion and the edge portion, the gap being adapted to accommodate an adhesive to bond the peripheral portion and the edge portion.

7. The backlight module according to any one of claims 1-5, characterized in that, The frame also includes a back panel, which includes a back panel bottom plate and a back panel side plate that is bent and connected to the back panel bottom plate; the first frame also includes a support portion, which is bent and connected to the end of the platform portion away from the periphery; wherein the support portion is supported by the back panel bottom plate and the periphery portion is supported by the back panel side plate.

8. The backlight module according to claim 7, characterized in that, The frame also includes a second frame, which is connected to the outside of the back panel side panel and the periphery.

9. The backlight module according to claim 8, characterized in that, The backlight module also includes an optical film, which abuts between the light guide and the second frame.

10. A display device, characterized in that, Includes the backlight module according to any one of claims 1-9.

Images