Backlight module and display device
By setting limiting components in the recess of the back plate to contact the bottom and sides of the light guide plate, the support problem of the light guide plate above the recess is solved, thereby improving the stability and light output effect of the light guide plate.
Patent Information
- Application Number
- CN202423321096.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the backlight module, the light guide plate is difficult to be effectively supported above the recessed area due to the recessed area around the back plate, resulting in poor light output.
By setting a limiting member in the recess of the back plate, the limiting member contacts the bottom and side surfaces of the light guide plate, providing stable support, limiting the displacement of the light guide plate, and ensuring effective support of the light guide plate in the position above the recess.
The stability and light guiding effect of the light guide plate have been improved, ensuring the structural stability and light output effect of the backlight module.
Smart Images
Figure CN223624501U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, specifically to a backlight module and display device. Background Technology
[0002] Backlight modules typically include a backplate and a limiting component and a light guide plate disposed on the backplate. The limiting component can restrict the displacement of the light guide plate to prevent the position of the light guide plate from changing under different placement states of the backlight module (e.g., upright and inverted states), thereby preventing the light emission effect of the backlight module from being affected.
[0003] In related technologies, considering the backplate manufacturing process and the heat dissipation requirements of electronic components, there will be a recess around the backplate. This creates a step difference between the plane of the backplate that supports the light guide plate and the bottom of the recess. This makes it difficult for the part of the light guide plate located above the recess to be effectively supported, which can easily lead to sagging and cause the backlight module to emit darker light at the position above the recess, ultimately affecting the light emission effect of the backlight module. Utility Model Content
[0004] This application provides a backlight module and a display device to at least solve the problem of poor light emission effect of the backlight module at the position above the recess in the related art.
[0005] On one hand, this application provides a backlight module, which includes a back plate, a light guide plate, and at least one limiting member. At least one side of the back plate has a recess; the light guide plate is disposed on the back plate; the limiting member is disposed within the recess, and the limiting member contacts the bottom surface of the light guide plate and abuts against the side surface of the light guide plate.
[0006] In some embodiments, the backlight module further includes a light source disposed on a first side of the back plate and facing a first side of the light guide plate; the limiting member is disposed on the first side, the limiting member includes a limiting portion, the limiting portion abutting against a second side of the light guide plate, the first side and the second side being adjacent.
[0007] In some embodiments, the backlight module further includes a light source disposed on a first side of the back plate and facing a first side of the light guide plate; the back plate has a second side opposite to the first side, and the limiting member is disposed on the second side; the limiting member includes a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion abutting against two adjacent sides of the light guide plate.
[0008] In some embodiments, the limiting member further includes a support portion that contacts the bottom surface of the light guide plate, and the first limiting portion and the second limiting portion are disposed on the support portion and located on two adjacent sides of the support portion.
[0009] In some embodiments, the backlight module further includes a blocking member, the two ends of which abut against the first side of the light source and the light guide plate.
[0010] In some embodiments, the limiting member includes a support portion that contacts the bottom surface of the light guide plate, and the thickness of the support portion is equal to the depth of the recess.
[0011] In some embodiments, the limiting member further includes a limiting portion located on one side of the support portion, the limiting portion abutting against the side of the light guide plate, and the top surface of the limiting portion being flush with the top surface of the light guide plate.
[0012] In some embodiments, one of the back plate and the limiting member is provided with an opening, and the other is provided with a protrusion, the protrusion being inserted into the opening.
[0013] In some embodiments, the opening is provided on the back plate, and the protrusion is provided on the limiting member.
[0014] 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.
[0015] In the backlight module provided in this embodiment, since the limiting member abuts against the side of the light guide plate, the displacement of the light guide plate toward the limiting member can be restricted, thereby improving the stability of the light guide plate and enhancing its light guiding effect. Furthermore, since the limiting member contacts the bottom surface of the light guide plate, it provides good support for the light guide plate, preventing the portion of the light guide plate located above the recess from sagging and causing that part of the light guide plate to have poor light guiding performance. Therefore, the backlight module provided in this embodiment has good structural stability and can achieve good light emission performance. Attached Figure Description
[0016] 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.
[0017] Figure 1 This is a structural diagram of a backlight module without a light guide plate, provided in some embodiments of this application;
[0018] Figure 2 This is a structural diagram of a backlight module after a light guide plate is installed, according to some embodiments of this application;
[0019] Figure 3This is a partial structural cross-sectional view of a backlight module provided in some embodiments of this application;
[0020] Figure 4 This is a schematic diagram of the structure of a limiting member according to some embodiments of this application;
[0021] Figure 5 This is a schematic diagram of the structure of the limiting member according to other embodiments of this application;
[0022] Figure 6 This is a schematic diagram of the structure of the limiting member according to some embodiments of this application;
[0023] Figure 7 This is a schematic diagram of the structure of a backplate according to some embodiments of this application. Detailed Implementation
[0024] 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.
[0025] In the description of this application, it should be understood that the terms "length," "width," "thickness," "top," "bottom," "lateral," "longitudinal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different technical features. The term "multiple" and similar words indicate two or more, unless otherwise expressly defined.
[0026] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.
[0027] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values may in practice be based on additional conditions or values beyond those stated.
[0028] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application.
[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 backlight module, such as Figures 1 to 3 As shown, the backlight module 100 includes a back plate 10, a light guide plate 30, and at least one limiting member 20. At least one side of the back plate 10 has a recess K, the light guide plate 30 is located on the back plate 10, and a portion of the light guide plate 30 is located above the recess K. The limiting member 20 is disposed within the recess K, and the limiting member 20 contacts the bottom surface of the light guide plate 30 and abuts against the side surface of the light guide plate 30.
[0031] With the above-described configuration, the limiting member 20, while abutting against the side of the light guide plate 30, can restrict the displacement of the light guide plate 30 toward the limiting member 20, thereby improving the stability of the light guide plate 30 and enhancing its light guiding effect. Furthermore, while contacting the bottom surface of the light guide plate 30, the limiting member 20 can provide good support for the light guide plate 30, thus preventing the portion of the light guide plate 30 above the recess K from sagging and causing the sagging portion to fail to provide a good light guiding effect. Therefore, the backlight module 100 provided in this embodiment has good structural stability and can achieve good light emission.
[0032] In some embodiments, such as Figures 3 to 5 As shown, the limiting member 20 includes a support portion 21, which contacts the bottom surface of the light guide plate 30, and the thickness of the support portion 21 is equal to the depth of the recess K.
[0033] This configuration allows the support portion 21 to provide stable and effective support for the light guide plate 30, ensuring that the bottom surface of the light guide plate 30 is always on the same horizontal plane, thereby ensuring that the light guide plate 30 has a good light guiding effect and thus achieving a good light output effect for the backlight module 100.
[0034] As an example, the backplate 10 includes a support surface 101 located outside the recess K, which contacts the light guide plate 30. The surface of the support portion 21 that contacts the light guide plate 30 is located on the same plane as the support surface 101, thereby enabling the light guide plate 30 to be in a stable horizontal state.
[0035] In some examples, the surface of the support portion 21 away from the light guide plate 30 is in contact with the bottom surface 102 of the recess K. As an example, the surface of the support portion 21 away from the light guide plate 30 and the bottom surface 102 of the recess K are parallel planes, which improves the fit between the support portion 21 and the bottom surface 102 of the recess K, thereby ensuring the installation stability of the support portion 21. The bottom surface 102 of the recess K is a portion of the surface of the back plate 10 near the light guide plate 30 (including the support surface 101 and the bottom surface 102).
[0036] In some embodiments, the dimension of the support portion 21 is less than or equal to the width of the recess K along its width direction. The length direction of the recess K is the same as the extension direction of the sidewall of the back plate 10 on its side, and the width direction of the recess K is perpendicular to its own length direction. This configuration allows the limiting member 20 to be easily placed into the recess K, thereby achieving the installation of the limiting member 20.
[0037] As an example, the size of the support 21 is smaller than the width of the recess K.
[0038] In some embodiments, please continue reading Figures 3 to 5 The limiting member 20 also includes a limiting part 22 located on one side of the support part 21, and the limiting part 22 abuts against the side of the light guide plate 30.
[0039] In some examples, the top surface 220 of the limiting part 22 is flush with the top surface 301 of the light guide plate 30. This arrangement allows the top surface 220 of the limiting part 22 and the top surface 301 of the light guide plate 30 to jointly serve as a bearing surface, which facilitates the placement of other components in the backlight module 100 on this bearing surface, thereby providing good support for the components.
[0040] In some examples, the support 21 and the limiting part 22 can be integrally formed, which can ensure the structural stability of the limiting part 20 so as to effectively limit and support the light guide plate 30.
[0041] In some embodiments, such as Figure 1 and Figure 2 As shown, the backlight module 100 also includes a light source 40, which is disposed on the first side 11 of the back plate 10 and faces the first side 31 of the light guide plate 30. A limiting member 20 is disposed on the first side 11, and the limiting member 20 includes a limiting part 22, which abuts against the second side 32 of the light guide plate 30. The first side 31 and the second side 32 are adjacent to each other.
[0042] This arrangement positions the limiting part 22 at one corner of the back plate 10, restricting the light guide plate 30 from moving toward the limiting part 22 along its length. The length direction of the light guide plate 30 is the same as the extending direction of its first side surface 31.
[0043] In some examples, the surface of the limiting member 20 away from the second side 32 contacts the sidewall of the back plate 10 near the limiting member 20, thereby improving the limiting effect of the limiting member 20 on the light guide plate 30. As one implementation, the thickness of the limiting member 20 is equal to the distance between the light guide plate 30 and the sidewall of the back plate 10 near the limiting member 20, so that both sides of the limiting member 20 contact the sidewall of the back plate 10 and the second side 32 of the light guide plate 30, respectively.
[0044] In some embodiments, such as Figure 2 As shown, the light guide plate 30 has a third side 33 opposite to the second side 32. There are at least two limiting members 20, one of which abuts against the second side 32 of the light guide plate 30 and the other limiting member 20 abuts against the third side 33 of the light guide plate 30. In this way, the light guide plate 30 can be limited in its length direction, thereby achieving the lateral fixation of the light guide plate 30.
[0045] In some embodiments, such as Figure 1 , Figure 2 as well as Figure 5 As shown, when the backlight module 100 includes a light source 40 and the light source 40 is disposed on the first side 11 of the back plate 10, the back plate 10 has a second side 12 disposed opposite to the first side 11, and a limiting member 20 is disposed on the second side 12. The limiting member 20 includes a first limiting portion 221 and a second limiting portion 222, which abut against two adjacent sides of the light guide plate 30.
[0046] In some examples, the light guide plate 30 has a fourth side 34 opposite to the first side 31, a first limiting portion 221 abuts against the second side 32, and a second limiting portion 222 abuts against the fourth side 34.
[0047] Therefore, since the limiting member 20 includes a first limiting portion 221 and a second limiting portion 222, and the first limiting portion 221 and the second limiting portion 222 abut against two adjacent sides of the light guide plate 30, the displacement of the light guide plate 30 along its length direction toward the first limiting portion 221 can be restricted, while the displacement of the light guide plate 30 along its width direction toward the second limiting portion 222 can also be restricted. Furthermore, this reduces the number of limiting members 20 required, thereby saving on manufacturing costs.
[0048] It is worth noting that the width direction of the light guide plate 30 is the same as the extension direction of the second side 32.
[0049] In some examples, two limiting members 20 may be provided on the second side 12 of the back plate 10, with the two limiting members 20 located at both ends of the second side 12. For example, the two limiting members 20 may be located at two corners of the back plate 10 on the second side 12. The first limiting portion 221 of one limiting member 20 abuts against the second side 32 of the light guide plate 30, and the first limiting portion 221 of the other limiting member 20 abuts against the third side 33 of the light guide plate 30. This can limit the light guide plate 30 in its length direction, thereby achieving lateral fixation of the light guide plate 30. In addition, the second limiting portions 222 of both limiting members 20 abut against the fourth side of the light guide plate 30.
[0050] In some embodiments, such as Figure 2 As shown, the backlight module 100 also includes a blocking member 50, the two ends of which abut against the first side surface 31 of the light source 40 and the light guide plate 30.
[0051] With this configuration, the second limiting part 222 of the limiting member 20 and the blocking member 50 can limit the light guide plate 30 in its width direction, thereby achieving longitudinal fixation of the light guide plate 30.
[0052] In some examples, there can be multiple blocking elements 50, and the multiple blocking elements 50 can be evenly arranged along the extension direction of the light source 40, which can improve the fixing effect of the light guide plate 30.
[0053] In some embodiments, such as Figure 2 and Figure 5 As shown, the limiting member 20 also includes a support portion 21, which contacts the bottom surface of the light guide plate 30. The first limiting portion 221 and the second limiting portion 222 are disposed on the support portion 21 and located on two adjacent sides of the support portion 21.
[0054] This configuration provides a relatively large surface area for the support portion 21 to support the light guide plate 30. It also facilitates the contact of the side surface of the first limiting portion 221 away from the light guide plate 30 with the side wall of the back plate 10, and the contact of the side surface of the second limiting portion 222 away from the light guide plate 30 with the other side wall of the back plate 10, thereby enhancing the limiting effect on the light guide plate 30.
[0055] In some embodiments, such as Figure 1 As shown, four limiting members 20 can be provided. Two limiting members 20 are located at both ends of the first side 11 of the back plate 10, and the other two limiting members 20 are located at both ends of the second side 12 of the back plate 10. In this case, the four limiting members 20 are provided at the four corners of the back plate 10.
[0056] With this configuration, the four limiting members 20 can achieve lateral fixation of the light guide plate 30; on the other hand, the limiting member 20 located on the second side 12 of the back plate 10 can also achieve longitudinal fixation of the light guide plate 30 with the cooperation of the blocking member 50. In this way, the light guide plate 30 can be effectively fixed with a small number of limiting members 20, thereby ensuring that the backlight module 100 has a good light emission effect while reducing the manufacturing cost of the backlight module 100.
[0057] In some embodiments, such as Figure 6 and Figure 7 As shown, one of the back plate 10 and the limiting member 20 is provided with an opening N, and the other is provided with a protrusion 201. The protrusion 201 is inserted into the opening N so that the limiting member 20 is fixed on the back plate 10.
[0058] It should be noted that in related technologies, the limiting component is often fixed to the back plate with adhesive. However, in high temperature or high humidity environments, relative displacement can easily occur between the limiting component and the adhesive, resulting in misalignment and a decrease in the reliability of the backlight module. In this embodiment, the limiting component 20 and the back plate 10 are fixed by the insertion and engagement of the protrusion 201 and the opening N. This avoids the use of adhesive, thus saving materials and costs. Furthermore, it improves the structural stability between the limiting component 20 and the back plate 10, thereby ensuring the reliability of the backlight module 100.
[0059] In some embodiments, please continue reading Figure 6 and Figure 7 An opening N is provided on the back plate 10, and a protrusion 201 is provided on the limiting member 20.
[0060] This design allows the limiting component 20 to have a relatively large size, which facilitates its positioning and installation. In addition, since the opening N is located on the back plate 10, the existing back plate 10 production line can be used to directly fabricate the opening N on the back plate 10, thereby avoiding the need to design new production molds and thus avoid increasing costs due to changes in the back plate 10.
[0061] As one implementation method, the back plate 10 can be formed with openings N by stamping.
[0062] In some examples, the cross-sectional shape of the protrusion 201 is adapted to the shape of the opening N to ensure that the protrusion 201 can be inserted and mated with the opening N. As an example, the shape of the opening N can be rectangular, rounded rectangle, ellipse, etc., which can achieve rapid positioning of the placement direction of the protrusion 201, thereby improving the installation efficiency of the limiting member 20.
[0063] Some embodiments of this application also provide a display device, which includes the backlight module 100 described in any of the above embodiments.
[0064] Since it includes a backlight module 100, the display device has the technical effects of the backlight module 100, which will not be elaborated here.
[0065] In some examples, the display device also includes a liquid crystal display panel, and the light transmittance at various positions of the liquid crystal display panel can be controlled by controlling the deflection of liquid crystal molecules in the liquid crystal display panel, thereby enabling the display device to display images.
[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: A back plate, wherein at least one side of the back plate has a recess; A light guide plate is disposed on the back plate; as well as At least one limiting member is disposed within the recess, the limiting member contacting the bottom surface of the light guide plate and abutting against the side surface of the light guide plate.
2. The backlight module according to claim 1, characterized in that, The backlight module also includes a light source, which is disposed on a first side of the back plate and faces the first side of the light guide plate. The limiting member is disposed on the first side, and the limiting member includes a limiting part, which abuts against the second side of the light guide plate. The first side and the second side are adjacent to each other.
3. The backlight module according to claim 1, characterized in that, The backlight module also includes a light source, which is disposed on a first side of the back plate and faces the first side of the light guide plate. The back plate has a second side opposite to the first side, and the limiting member is disposed on the second side; the limiting member includes a first limiting part and a second limiting part, the first limiting part and the second limiting part abutting against two adjacent sides of the light guide plate.
4. The backlight module according to claim 3, characterized in that, The limiting member also includes a support portion, which contacts the bottom surface of the light guide plate. The first limiting portion and the second limiting portion are disposed on the support portion and located on two adjacent sides of the support portion.
5. The backlight module according to claim 3, characterized in that, The backlight module also includes a blocking member, the two ends of which abut against the first side of the light source and the light guide plate.
6. The backlight module according to any one of claims 1-5, characterized in that, The limiting member includes a support portion that contacts the bottom surface of the light guide plate, and the thickness of the support portion is equal to the depth of the recess.
7. The backlight module according to claim 6, characterized in that, The limiting member also includes a limiting part located on one side of the support portion, the limiting part abutting against the side of the light guide plate, and the top surface of the limiting part being flush with the top surface of the light guide plate.
8. The backlight module according to any one of claims 1-5, characterized in that, One of the back plate and the limiting member is provided with an opening, and the other is provided with a protrusion, the protrusion being inserted into the opening.
9. The backlight module according to claim 8, characterized in that, The opening is provided on the back plate, and the protrusion is provided on the limiting member.
10. A display device, characterized in that, Includes the backlight module as described in any one of claims 1-9.