Backlight module and display device
By introducing a fixed structure of limiters and light strips into the backlight module, the compatibility problem of the backlight module in being compatible with different partition light control schemes is solved, the back panel body can be reused multiple times, the molding cost and construction period are reduced, and the assembly efficiency and overall aesthetics are improved.
Patent Information
- Application Number
- CN202422382586.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-27
AI Technical Summary
When existing backlight modules are compatible with optical solutions for different zone light control, the back panel body needs to be re-molded or re-molded, which leads to extended construction period and increased costs, and poor compatibility.
The limiters are fixed to the light strips. Positioning grooves and limit protrusions are set on the back panel body to achieve stable fixation of the limiters and the light strips. It is suitable for optical solutions with multiple zone light control. The distribution of the light strips can be adjusted by simply changing the position of the limiters.
The stability and compatibility of the backlight module are improved, the need to replace the back panel body is reduced, costs are saved, and assembly efficiency and the aesthetics of the overall structure are improved.
Smart Images
Figure CN223486322U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display technology, and in particular to a backlight module and a display device. Background Technology
[0002] Display devices are lightweight, thin, and consume little power, and are widely used in modern information equipment. Since the display panel itself does not have light-emitting properties, it needs to rely on the backlight module to supply sufficient and evenly distributed light sources to achieve the display function. Therefore, the performance of the backlight module directly affects the quality of the LCD.
[0003] Currently, to perfectly present the layered details of the image, backlight modules need to utilize local dimming technology. However, there are many optical solutions that meet the requirements of local dimming, and the positioning and fixing methods of the LED strips and the backplate body differ under different optical solutions. The existing technology, which adds positioning protrusions to the backplate body, can only be applied to one type of local dimming optical solution, resulting in poor compatibility. When applied to other local dimming optical solutions, it is often necessary to completely re-mold the backplate body to match other designs, or to re-mold it, which leads to extended production time and increased costs.
[0004] Therefore, there is a need to provide a backlight module and a display device to solve the above problems. Utility Model Content
[0005] This application provides a backlight module and a display device that are compatible with different local dimming schemes.
[0006] This application provides a backlight module, including:
[0007] Back panel main body;
[0008] Limiting components;
[0009] The light strip and the limiting member are disposed on the same side of the back plate body, and the limiting member is fixed to the light strip.
[0010] In some embodiments, the back plate body is provided with a positioning groove; the limiting member is disposed in the positioning groove and has a slot protruding from the positioning groove.
[0011] In some embodiments, the limiting member includes a limiting body and a limiting protrusion. The projection of the limiting protrusion on the back plate body is smaller than the projection of the limiting body on the back plate body. The limiting protrusion protrudes from the opening of the positioning groove. The limiting protrusion is fixed to the light strip.
[0012] In some embodiments, the depth of the positioning groove is greater than or equal to the thickness of the limiting body.
[0013] In some embodiments, the limiting member has a first recess on the side near the back plate body, so that the limiting member forms the limiting protrusion on the side away from the back plate body.
[0014] In some embodiments, the limiting protrusion includes a first limiting protrusion, and the light strip is provided with a limiting hole, wherein the first limiting protrusion is disposed in the limiting hole.
[0015] In some embodiments, there are multiple light strips, and the limiting protrusion includes a second limiting protrusion disposed between adjacent light strips.
[0016] In some embodiments, the backlight module further includes a filler disposed between the positioning groove and the periphery of the limiting member.
[0017] In some embodiments, the backlight module further includes an adhesive disposed between the backplate body and the light strip.
[0018] This application embodiment also provides a display device, including:
[0019] Backlight module, wherein the backlight module is the aforementioned backlight module;
[0020] The display panel is disposed opposite to the backlight module.
[0021] The backlight module and display device provided in this application include a backplate body, a limiting member, and multiple LED strips. The limiting member and the multiple LED strips are disposed on the backplate body and are fixed to the LED strips to fix the relative position of the LED strips to the backplate body or the relative position between the LED strips, thereby maintaining the stability of the backlight module. The backplate body provided in this application can be adapted to multiple local dimming optical schemes. Only the position of the limiting member needs to be changed to adapt to different LED strip distributions to meet different local dimming optical schemes. Attached Figure Description
[0022] 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 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.
[0023] Figure 1 This is a schematic diagram of the structure of a backlight module in the prior art.
[0024] Figure 2 This is a schematic diagram of a first structure of a backlight module provided in an embodiment of this application.
[0025] Figure 3 This is a schematic diagram of a second structure of the backlight module provided in an embodiment of this application. Detailed Implementation
[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.
[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a backlight module in the prior art. Display devices have advantages such as being lightweight, thin, and having low power consumption, and are widely used in modern information equipment. Since the display panel itself does not have light-emitting characteristics, it needs to rely on the backlight module 10 to supply sufficient and evenly distributed light sources to achieve the display function. Therefore, the performance of the backlight module 10 directly affects the quality of the liquid crystal display.
[0028] Currently, to perfectly present the details of the image, the backlight module 10 needs to use a local dimming optical solution. However, there are many optical solutions that meet the requirements of local dimming, and the positioning and fixing methods of the LED strip 12 and the backplate body 11 are also different under different optical solutions. The existing technology, which adds a positioning protrusion 111 to the backplate body 11, can only be applied to one type of local dimming optical solution, resulting in poor compatibility. When applied to other local dimming optical solutions, it is often necessary to re-mold the entire backplate body 11 to match other designs, or to re-mold it, which will lead to extended production time and increased costs.
[0029] Therefore, there is a need to provide a backlight module and display device to solve the above-mentioned technical problems.
[0030] Please see Figure 2 as well as Figure 3 , Figure 2 This is a schematic diagram of a first structure of a backlight module provided in an embodiment of this application. Figure 3 This is a second structural schematic diagram of the backlight module provided in an embodiment of this application. This application provides a backlight module and a display device that are compatible with different local dimming schemes.
[0031] This application provides a backlight module 20, which includes a back panel body 21, a limiting member 22, and an LED strip 23. The LED strip 23 and the limiting member 22 are disposed on the same side of the back panel body 21, and the limiting member 22 is fixed to the LED strip 23.
[0032] Please continue reading. Figure 3 The main body 21 of the back panel, as a large-area support structure, should have certain strength and fire resistance characteristics. The material of the back panel can be metal or plastic.
[0033] In the optical scheme of local dimming, the back panel body 21 is divided into multiple light-emitting areas of different or equal shapes. The brightness and contrast of the light-emitting structure in each light-emitting area are also different, thereby improving the sense of layering and detail of the image.
[0034] Multiple LED strips 23 can be arranged within each light-emitting area, and the LED strips 23 serve as carriers for the light-emitting units 231. The light-emitting units 231 can be mini LEDs, micro LEDs, or ordinary LEDs. Please refer to [link / reference]. Figure 2 , Figure 2 Taking two adjacent light strips 23 as an example, in reality, there are more than two light strips. Adjacent light strips 23 can have a fixed distance between them to improve the light emission uniformity of the backlight module 20. The light strips 23 can be classified according to their shape into straight light strips, U-shaped light strips, light panels, harpoon-shaped light strips, etc.
[0035] However, in different optical schemes for zoned light control, the positions of the light strips 23 on the backplate body 21 are different relative to the same backplate body 21, and the positions between the light strips 23 are also different. Therefore, this application proposes to fix the limiting member 22 to the light strips 23, which can limit the relative position of the light strips 23 to the backplate body 21 or the relative position of the light strips 23 to each other, thus meeting the needs of different optical schemes for zoned light control.
[0036] When the backlight module 20 is used with a first-zone light control optical scheme, the limiting member 22 is positioned at a first position on the backplate body 21, which restricts the arrangement of the LED strips 23 according to the first-zone light control optical scheme. When the backlight module 20 is used with a second-zone light control optical scheme, the limiting member 22 is positioned at a second position on the backplate body 21, which restricts the arrangement of the LED strips 23 according to the second-zone light control optical scheme. It is understood that, depending on the different zone light control optical schemes, only the arrangement of the limiting member 22 on the backplate body 21 needs to be changed to restrict the relative positions of multiple LED strips 23, i.e., there is no need to replace the backplate body 21.
[0037] The limiting member 22 can be fixed to the back panel body 21 using detachable methods such as adhesive, screws, or riveting, facilitating changes to the relative position of the limiting member 22 and the back panel body 21. The limiting member 22 can be made of plastic or metal. When the limiting member 22 is made of plastic, it can be manufactured by vacuum forming or injection molding; when the limiting member 22 is made of metal, it can be manufactured by stamping.
[0038] In this way, one backplate body 21 can be used for multiple local dimming optical schemes. Only the limiting component 22 needs to be replaced. Under the premise of keeping the OD value of the backlight module 20 unchanged, it can adapt to different LED strip 23 distributions to meet different local dimming optical schemes. That is, the backlight module 20 provided in this embodiment can be compatible with different local dimming optical schemes. The material of the backplate body 21 is a high-strength and fire-resistant metal material, which means that the cost is high. If one backplate body 21 can be used for multiple local dimming optical schemes, the reuse rate of the backplate body 21 is improved, and there is no need to modify or re-mold, which greatly saves costs.
[0039] In order to further improve the stability of the connection between the limiting member 22 and the back plate body 21 and to quickly fix the limiting member 22 on the back plate body 21, the back plate body 21 is provided with a positioning groove 211, the limiting member 22 is disposed in the positioning groove 211 and the limiting member 22 protrudes from the groove of the positioning groove 211.
[0040] Understandably, when the limiting member 22 is to move along the plane of the back panel body 21, the groove wall of the positioning groove 211 can abut against the limiting member 22. This not only restricts the limiting member 22 from moving or shaking during the fixing process with the back panel body 21, but also restricts the movement of the light strip 23 when it abuts against the limiting member 22, and also prevents the limiting member 22 from falling off the back panel due to handling or gravity during the use of the backlight module 20. Therefore, the positioning groove 211 provided on the back panel body 21 can improve the stability of the limiting member 22 fixed on the back panel body 21.
[0041] In a further embodiment, to further ensure that the limiting member 22 is fixed within the positioning groove 211 and to prevent the limiting member 22 from shaking and affecting the positioning of the light strip 23 on the back panel body 21, the backlight module 20 also includes a filler, which is disposed between the positioning groove 211 and the periphery of the limiting member 22. This filler can be elastic and can be foam. By providing the filler, when the limiting member 22 is inserted into the positioning groove 211 and fixed, the filler can press and fix the limiting member 22 from its periphery, further restricting the movement of the limiting member 22 within the positioning groove 211, and also preventing the limiting member 22 from colliding with the groove wall of the positioning groove 211 and causing damage.
[0042] It is understandable that the size of the light strip 23 is small, and the distance between the light strips 23 is small, but the opening of the positioning groove 211 is relatively wide. If the size of the limiting member 22 only matches the positioning groove 211, it is not suitable for setting the light strip 23. If the size of the limiting member 22 only meets the structure and distance setting of the light strip 23, then the size of the positioning groove 211 will not match, or the positioning groove 211 needs to be set as long and narrow, but this is not convenient to manufacture.
[0043] To solve the aforementioned technical problems, the limiting component 22 includes a limiting body 221 and a limiting protrusion 222. The projection of the limiting protrusion 222 onto the back plate body 21 is smaller than the projection of the limiting body 221 onto the back plate body 21. The limiting body 221 is disposed within the positioning groove 211, and the volume of the limiting body 221 corresponds to the size of the positioning groove 211. The limiting protrusion 222 protrudes from the opening of the positioning groove 211. The size of the limiting protrusion 222 corresponds to the structure of the light strip 23 or to the distance between adjacent light strips 23.
[0044] The height of the limiting protrusion 222 protruding from the slot can be less than or equal to the thickness of the light strip 23, thus avoiding the limiting member 22 from blocking the light generated by the light strip 23.
[0045] The depth of the positioning groove 211 is greater than or equal to the thickness of the limiting body 221, so that the limiting body 221 will not protrude from the surface of the back plate body 21. Only the limiting protrusion 222 protrudes from the surface of the back plate body 21 to fix the light strip 23, ensuring that the back plate body 21 is flat and beautiful, avoiding interference between the limiting part 22 and the connection and fixation between the light strip 23 and the back plate body 21. At the same time, it can also reduce the overall structural height of the backlight module 20 and have a uniform OD value (distance between the light-emitting unit 231 and the diffuser plate).
[0046] In some cases, the limiting protrusion 222 includes a first limiting protrusion connected to the limiting body 221. The light strip 23 has a limiting hole, and the first limiting protrusion is disposed within the limiting hole. The cooperation between the first limiting protrusion and the limiting hole enables the light strip 23 to be quickly positioned onto the back plate body 21, improving assembly efficiency.
[0047] In other cases, the limiting protrusion 222 includes a second limiting protrusion connected to the limiting body 221. The second limiting protrusion is disposed between adjacent light bars 23 to fix the distance between adjacent light bars 23.
[0048] In some cases, there are multiple limiting protrusions 222, including a first limiting protrusion and a second limiting protrusion. The first limiting protrusion is connected to the limiting body 221. The light strip 23 is provided with a limiting hole, and the first limiting protrusion is disposed in the limiting hole. The second limiting protrusion is connected to the limiting body 221 and is disposed between adjacent light strips 23 to fix the distance between adjacent light strips 23.
[0049] It is understandable that by setting the first limiting protrusion and the first limiting protrusion, the distance between adjacent light strips 23 can be fixed, as well as the relative position of the light strip 23 and the back plate body 21 can be fixed, thereby ensuring that the light strip 23 can be quickly positioned on the back plate body 21 in the later stage, and improving assembly efficiency.
[0050] The limiting member 22 is recessed in the direction away from the back panel body 21 to form a limiting protrusion 222, that is, the limiting member 22 has a recess on the side facing closer to the back panel body 21. For example, the limiting member 22 has a first recess 223 on the side facing closer to the back panel body 21, so that the limiting member 22 forms a limiting protrusion 222 on the side away from the back panel body 21. The method of forming this limiting protrusion 222 is suitable for plastic vacuum forming or metal stamping processes, and the manufacturing method is relatively simple and efficient. In addition, no additional structure or material is required, and no additional weight burden is added.
[0051] The backlight module 20 also includes an adhesive (referred to as the first adhesive 24), which is disposed between the back panel body 21 and the light strip 23. The first adhesive 24 is used to fix the relative positions of the back panel body 21 and the light strip 23.
[0052] In some cases, the light strip 23 also extends toward the limiting body 221 of the limiting member 22, so as to overlap the limiting body 221. The backlight module 20 also includes a second adhesive 25, which is disposed on the limiting body 221 and the light strip 23, and is used to fix the relative position of the limiting member 22 and the light strip 23.
[0053] In addition, the backlight module 20 also includes a third colloid 26, which is disposed in the positioning groove 211. The third colloid 26 is disposed between the bottom of the positioning groove 211 and the limiting body 221. The third colloid 26 is used to fix the limiting member 22 and the back plate body 21 to prevent the limiting member 22 from coming out of the positioning groove 211.
[0054] It is understandable that the side of the limiting body 221 near the bottom of the positioning groove 211 has a rough surface, which can increase the contact area between the third colloid 26 and the limiting body 221, thereby increasing the firmness of fixing the limiting member 22 and the back plate body 21 by the third colloid 26.
[0055] Furthermore, the limiting member 22 is recessed in the direction away from the back panel body 21 to form a limiting protrusion 222, that is, the limiting member 22 has a recess on the side closer to the back panel body 21. For example, the limiting member 22 is recessed in the direction away from the back panel body 21, a limiting protrusion 222 is formed on the side of the limiting member 22 away from the back panel body 21, and a first recess 223 is formed on the side of the limiting member 22 facing the back panel body 21.
[0056] Since the third colloid 26 is disposed between the bottom of the positioning groove 211 and the limiting body 221, the third colloid 26 can fill the first recess 223 to improve the firmness of the third colloid 26 in fixing the limiting member 22 and the back plate body 21.
[0057] This application embodiment also provides a display device, which can be a television set or a display screen or other device with display function. The display device includes the backlight module 20 and a display panel, which is disposed opposite to the backlight module 20, and the light generated by the backlight module 20 can illuminate the display panel.
[0058] In the backlight module 20 and display device provided in this application embodiment, the backlight module 20 includes a backplate body 21, a limiting member 22, and multiple LED strips 23. The backplate body 21 is provided with a positioning groove 211. The limiting member 22 includes a limiting body 221 and a limiting protrusion 222. The limiting body 221 is disposed within the positioning groove 211, and the limiting protrusion 222 protrudes from the opening of the positioning groove 211. The limiting member 22 is connected to the LED strips 23 and can limit the relative position of the LED strips 23 with respect to the backplate body 21 or the relative position of LED strips 23 with each other, satisfying the requirements of different local dimming optical schemes. If the local dimming optical scheme needs to be changed, only the shape of the limiting member 22 needs to be changed to adapt to different LED strip distributions, thus satisfying different local dimming optical schemes. In other words, the backlight module 20 provided in this application embodiment is compatible with different local dimming optical schemes.
[0059] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0060] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.
[0061] The backlight module and display device provided in 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 descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. 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 back panel body is provided with a positioning groove; A limiting member is provided with a first recess on the side of the limiting member close to the back plate body, so that a limiting protrusion is formed on the side of the limiting member away from the back plate body, and the limiting protrusion protrudes from the opening of the positioning groove. A third colloid, wherein the third colloid is disposed in the positioning groove and the third colloid fills the first depression; The light strip and the limiting member are disposed on the same side of the back plate body, and the limiting member is fixed to the light strip.
2. The backlight module according to claim 1, characterized in that, The limiting component includes a limiting body and a limiting protrusion. The projection of the limiting protrusion on the back plate body is smaller than the projection of the limiting body on the back plate body. The limiting protrusion protrudes from the opening of the positioning groove. The limiting protrusion is fixed to the light strip.
3. The backlight module according to claim 2, characterized in that, The depth of the positioning groove is greater than or equal to the thickness of the limiting body.
4. The backlight module according to claim 2, characterized in that, The limiting protrusion includes a first limiting protrusion, and the light strip is provided with a limiting hole, with the first limiting protrusion disposed within the limiting hole.
5. The backlight module according to claim 2, characterized in that, There are multiple light strips, and the limiting protrusion includes a second limiting protrusion, which is disposed between adjacent light strips.
6. The backlight module according to claim 1, characterized in that, It also includes a filler, which is disposed between the positioning groove and the periphery of the limiting member.
7. The backlight module according to any one of claims 1 to 6, characterized in that, It also includes an adhesive, which is disposed between the backplate body and the light strip.
8. A display device, characterized in that, include: A backlight module, wherein the backlight module is the backlight module according to any one of claims 1 to 7; The display panel is disposed opposite to the backlight module.