Backlight module with optimized light emission

Abstract

The utility model relates to the technical field of backlight module, especially a backlight module capable of optimizing light emitting effect, including module main part, the module main part includes backlight plate, outer frame and metal cover plate, the backlight plate is embedded and fixed in the inside of outer frame, the metal cover plate is covered in the upper surface edge position of backlight plate, the outer frame and metal cover plate detachable clamping joint cooperation, the side surface of metal cover plate towards the backlight plate is sprayed with extinction ink layer, and the extinction ink layer is used for homogenizing the light distribution of viewing area to optimize the viewing area light emitting uniformity and brightness consistency of module main part. The utility model aims at providing a backlight module capable of optimizing light emitting effect, which can replace artificial black glue, improve efficiency and reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of backlight module technology, and in particular to a backlight module that can optimize light emission effect. Background Technology

[0002] In existing technologies, to optimize the backlight module's luminous effect in the viewing area, it is usually necessary to manually attach four strips of matte black adhesive (i.e., matte glue) to the inside of the metal cover plate corresponding to the non-luminous area to reduce stray light and improve luminous uniformity. However, this process has significant drawbacks: manual attachment requires positioning each piece individually, which is cumbersome and not only has extremely low production efficiency, making it difficult to adapt to the needs of mass production, but also easily leads to the black glue lifting or shifting due to attachment position deviation and uneven attachment force, which in turn causes light leakage or excessive shading, affecting the consistency of luminous effect. At the same time, the manual operation and the material cost of the black glue itself are high, which will significantly increase the overall production cost of the module in the long run. In addition, the adhesion stability of traditional black glue is poor, and it is easy to fall off due to changes in environmental temperature and humidity during long-term use, resulting in the decay of the backlight module's luminous effect and failing to meet the requirements of long-term stable use. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a backlight module that can replace manual application of black glue, improve efficiency, and reduce costs, thereby optimizing the light emission effect.

[0004] The present invention adopts the following technical solution:

[0005] A backlight module with optimized light emission effect includes a module body, the module body including a backlight panel, an outer frame and a metal cover plate; the backlight panel is embedded and fixed inside the outer frame; the metal cover plate covers the upper surface edge of the backlight panel; the outer frame and the metal cover plate are detachably snap-fitted together; the surface of the metal cover plate facing the backlight panel is coated with a matte ink layer, the matte ink layer is used to homogenize the light distribution in the viewing area to optimize the uniformity of light emission and brightness consistency in the viewing area of ​​the module body.

[0006] A further improvement to the above technical solution is that the matte ink layer is a black UV ink layer.

[0007] A further improvement to the above technical solution is that the inner sidewall of the outer frame encloses a receiving cavity, and the bottom wall of the receiving cavity is provided with a mounting boss; the top surface of the mounting boss is in contact with the bottom surface of the backlight panel, and the mounting boss is installed and connected to the backlight panel.

[0008] A further improvement to the above technical solution is that the accommodating cavity has a first flange on each of its two transverse sides for abutting against the metal cover plate, and each first flange has a first slot and a second slot on its top surface; the first slot has a first trapezoidal locking protrusion on the side wall near the mounting boss; the number of the second slots is set to two, and the two second slots are respectively located on both sides of the first slot, each second slot has a first positioning groove on the side near the first slot, and each second slot has a second trapezoidal locking protrusion on the side wall near the mounting boss.

[0009] A further improvement to the above technical solution is that a second flange for abutting against a metal cover plate is provided on one vertical side of the receiving cavity, and a third slot is provided on both sides of the second flange. A third trapezoidal protrusion is provided on the side wall of each third slot near the mounting boss; and an outer trapezoidal protrusion is provided at both outer ends of the second flange.

[0010] A further improvement to the above technical solution is that a third flange for abutting against a metal cover plate is provided on the other vertical side of the receiving cavity, and a fourth slot and a fifth slot are provided on the top surface of the third flange; the number of the fourth slots is set to three and is located in the center of the third flange; a second positioning groove is provided on one side of each fourth slot, and a fourth trapezoidal locking protrusion is provided on the side wall of each fourth slot near the mounting boss; the number of the fifth slots is set to two, and the two fifth slots are respectively located on both sides of the three fourth slots; a fifth trapezoidal locking protrusion is provided on the side wall of the fifth slot near the mounting boss.

[0011] A further improvement to the above technical solution is that a hollow cavity corresponding to the backlight emitting area is provided in the center of the metal cover plate to avoid blocking the backlight emitting area.

[0012] A further improvement to the above technical solution is that the metal cover plate has a plurality of first inserts on its lateral sides, and the plurality of first inserts are used to be inserted into and cooperate with the first slot and the second slot respectively; two first positioning pieces are provided between the plurality of first inserts on each side, and the first positioning pieces are used to position and abut against the first positioning groove; the first inserts have a first snap-fit ​​notch, and the first snap-fit ​​notch is used to be snap-fit ​​with the first trapezoidal snap protrusion and the second trapezoidal snap protrusion respectively.

[0013] A further improvement to the above technical solution is that the metal cover plate has two second inserts and two third inserts on one vertical side; the two second inserts are used to engage with the third slots, and the second inserts have second snap-fit ​​notches for engaging with the third trapezoidal protrusions; the two third inserts are located between the two second inserts; the third inserts have symmetrically arranged third snap-fit ​​notches for engaging with the outer trapezoidal protrusions.

[0014] A further improvement to the above technical solution is that the metal cover plate has a plurality of fourth inserts on its other vertical side, and the plurality of fourth inserts are used to be inserted into the fourth slot and the fifth slot respectively; each of the fourth inserts has a fourth snap-fit ​​notch, and the fourth snap-fit ​​notch is used to be snap-fitted into the fourth trapezoidal snap protrusion and the fifth trapezoidal snap protrusion respectively; a plurality of second positioning pieces are provided between the plurality of fourth inserts, and the second positioning pieces are used to position and abut against the second positioning groove.

[0015] The beneficial effects of this utility model are as follows: This invention achieves comprehensive optimization in terms of process, performance, and cost through the synergistic design of the outer frame, metal cover plate, and matte ink layer. In terms of process, inkjet-molded matte ink layer replaces traditional manual application of black adhesive, and the precise snap-fit ​​assembly of the metal cover plate and outer frame effectively improves production efficiency while reducing labor and black adhesive material costs, thus lowering overall production costs. In terms of performance, the multi-directional positioning structure of the outer frame and the insert and snap-fit ​​structure of the metal cover plate ensure assembly deviation, allowing the matte ink layer to accurately cover non-light-emitting areas. Combined with the low reflectivity and high adhesion characteristics of black UV ink, it optimizes the uniformity of light emission and brightness consistency in the viewing area, and the ink layer maintains stable adhesion over a long period, extending the module's lifespan. In terms of maintenance, the detachable snap-fit ​​assembly facilitates subsequent module maintenance, avoiding the maintenance losses of traditional black adhesive-applied modules, further reducing the total lifespan cost. Ultimately, it achieves a comprehensive advantage of high-efficiency production, low cost, high light emission performance, and long lifespan, making it suitable for mass-produced backlight module applications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the backlight module with optimized light emission effect according to this utility model; Figure 2 for Figure 1 An exploded view of a backlight module with optimized light emission effects; Figure 3 for Figure 1 A schematic diagram of the outer frame of a backlight module with optimized light emission effect; Figure 4 for Figure 1 A schematic diagram of the structure of the metal cover plate of the backlight module that can optimize the light emission effect.

[0017] The numbers on the map are: 10. Module body; 11. Backlight panel; 12. Matte ink layer; 20. Outer frame; 21. Receiving cavity; 22. Mounting boss; 30. Metal cover plate; 31. Hollow cavity; 32. First insert plate; 33. First positioning plate; 34. First snap-fit ​​notch; 40. First flange; 41. First slot; 42. Second slot; 43. First trapezoidal protrusion; 44. First positioning groove; 45. Second trapezoidal protrusion; 50. Second flange; 51. Third slot; 52. Third trapezoidal protrusion; 53. Outer trapezoidal protrusion; 60. Third flange; 61. Fourth slot; 62. Fifth slot; 63. Second positioning groove; 64. Fourth trapezoidal locking protrusion; 65. Fifth trapezoidal locking protrusion; 70. Second insert; 71. Second snap-fit ​​notch; 80. Third insert; 81. Third snap-fit ​​notch; 90. Fourth insert; 91. Fourth snap-fit ​​notch; 92. Second positioning piece. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "vertical direction," "up," "down," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figures 1 to 4 As shown, this is an embodiment of the present invention, relating to a backlight module with optimized light emission effect, including a module body 10. The module body 10 includes a backlight panel 11, an outer frame 20, and a metal cover plate 30. The backlight panel 11 is embedded and fixed inside the outer frame 20. The metal cover plate 30 covers the upper surface edge of the backlight panel 11. The outer frame 20 and the metal cover plate 30 are detachably snap-fitted together. The side surface of the metal cover plate 30 facing the backlight panel 11 is coated with a matte ink layer 12, which is used to homogenize the light distribution in the viewing area to optimize the uniformity of light emission and brightness consistency in the viewing area of ​​the module body 10. Specifically, by spraying a matte ink layer 12 onto the side of the metal cover plate 30 facing the backlight panel 11 instead of the traditional manual application of black glue, the tedious steps of manual positioning and application are eliminated, improving processing efficiency and reducing the cost of black glue materials and labor, thus lowering the overall production cost. On the other hand, the matte ink layer 12 can evenly cover the non-light-emitting area, and compared with the positional deviation and lifting problems that are prone to occur when manually applying black glue, it can more accurately homogenize the light distribution in the viewing area, significantly improving the uniformity of light emission and brightness consistency in the module's viewing area. In addition, the detachable snap-fit ​​connection between the outer frame 20 and the metal cover plate 30 not only facilitates precise alignment during module assembly but also provides convenience for subsequent maintenance, avoiding the secondary costs caused by damaging the black glue during the maintenance of traditional black glue-applied modules.

[0022] like Figure 2 As shown, the matte ink layer 12 is a black UV ink layer. Specifically, the matte ink layer 12 is a black UV ink layer. Black ink has low reflectivity, which can further absorb stray light from non-luminous areas, reduce the interference of light reflection on the luminous effect in the viewing area, and effectively reduce reflectivity. At the same time, UV ink is rapidly formed through ultraviolet curing, with a curing time of only a few seconds to tens of seconds, which greatly shortens the processing cycle of the ink layer.

[0023] like Figure 2As shown, the inner sidewall of the outer frame 20 encloses a receiving cavity 21, and the bottom wall of the receiving cavity 21 is provided with a mounting boss 22; the top surface of the mounting boss 22 is in contact with the bottom surface of the backlight panel 11, and the mounting boss 22 is installed and connected to the backlight panel 11. Specifically, the cavity 21 enclosed by the inner wall of the outer frame 20 provides a regular assembly space for the backlight panel 11 and the metal cover plate 30, avoiding positional displacement of the components due to irregular assembly space; the mounting boss 22 on the bottom wall of the cavity is attached and fixed to the bottom surface of the backlight panel 11. On the one hand, the surface contact improves the support stability of the backlight panel 11, preventing the backlight panel 11 from bending or deforming due to vibration or external force, and ensuring the stability of the light transmission path; on the other hand, the top surface of the mounting boss 22 can serve as the positioning reference for the backlight panel 11, ensuring that the backlight panel 11 and the matte ink layer 12 inside the metal cover plate 30 are accurately aligned, avoiding the ink layer from blocking the light-emitting area or leaking light due to the misalignment of the backlight panel 11, and further ensuring the consistency of the light emission effect in the viewing area.

[0024] like Figure 3 As shown, the receiving cavity 21 has first flanges 40 on both sides for abutting against the metal cover plate 30. Each first flange 40 has a first slot 41 and a second slot 42 on its top surface. The first slot 41 has a first trapezoidal locking protrusion 43 on the side wall near the mounting boss 22. There are two second slots 42, which are respectively located on both sides of the first slot 41. Each second slot 42 has a first positioning groove 44 on the side near the first slot 41, and each second slot 42 has a second trapezoidal locking protrusion 45 on the side wall near the mounting boss 22. Specifically, the first flange 40 serves as a lateral support and positioning structure for the metal cover plate 30. Its top surface has a first slot 41 and a second slot 42 that correspond one-to-one with the first insert 32 of the metal cover plate 30. The first trapezoidal protrusion 43 engages with the first engagement notch 34 of the insert to securely fix the metal cover plate 30 laterally, preventing lateral displacement that could cause misalignment between the ink layer and the non-light-emitting area of ​​the backlight panel 11. The two second slots 42 are symmetrically arranged on both sides of the first slot 41 to improve the stability of lateral assembly. The first positioning groove 44 abuts against the first positioning piece 33 of the metal cover plate 30, which can quickly calibrate the lateral position of the metal cover plate 30 during assembly. Compared with the deviation of traditional manual application of black glue, which relies on visual positioning, this greatly improves the assembly accuracy, ensures that the ink layer accurately covers the non-light-emitting area, and reduces the risk of light leakage.

[0025] like Figure 3As shown, the vertical side of the receiving cavity 21 is provided with a second flange 50 for abutting against the metal cover plate 30. The two sides of the second flange 50 are respectively provided with third slots 51. Each third slot 51 is provided with a third trapezoidal locking protrusion 52 on the side wall near the mounting boss 22. The outer ends of the second flange 50 are respectively provided with outer trapezoidal locking protrusions 53. Specifically, the second flange 50 provides support for the vertical side of the metal cover plate 30. The third slots 51 on both sides of the flange 50 cooperate with the second insert 70 of the metal cover plate 30, and the third trapezoidal protrusion 52 engages with the second snap-fit ​​notch 71 to achieve basic fixation on the vertical side. The outer trapezoidal protrusions 53 at both ends of the second flange 50 cooperate with the third insert 80 (with symmetrical third snap-fit ​​notches 81) of the metal cover plate 30 to form a double fixing structure of inner slots and outer protrusions. This effectively prevents the metal cover plate 30 from loosening due to vibration during long-term use of the module, thereby avoiding the positional displacement of the matte ink layer 12 and the backlight plate 11 and ensuring the long-term stability of the light-emitting effect. At the same time, the symmetrical design of the outer trapezoidal protrusions 53 facilitates the quick insertion of inserts and improves assembly efficiency.

[0026] like Figure 3 As shown, the other vertical side of the receiving cavity 21 is provided with a third flange 60 for abutting against the metal cover plate 30. The top surface of the third flange 60 is provided with a fourth slot 61 and a fifth slot 62. There are three fourth slots 61, which are located in the center of the third flange 60. A second positioning groove 63 is provided on one side of each fourth slot 61, and a fourth trapezoidal locking protrusion 64 is provided on the side wall of each fourth slot 61 near the mounting boss 22. There are two fifth slots 62, which are respectively located on both sides of the three fourth slots 61. A fifth trapezoidal locking protrusion 65 is provided on the side wall of each fifth slot 62 near the mounting boss 22. Specifically, the fourth slot 61 and the fifth slot 62 on the top surface of the third flange 60 are adapted to the fourth insert 90 on the other side of the vertical side of the metal cover plate 30. The three fourth slots 61 are located in the center and the two fifth slots 62 are symmetrically distributed on both sides. This layout can optimize the distribution of inserts according to the stress of the metal cover plate 30, improve the uniformity of support on the other side of the vertical side, and avoid excessive local stress that could cause deformation of the metal cover plate 30. The fourth trapezoidal snap-fit ​​64 engages with the fourth snap-fit ​​notch 91 to ensure a firm fixation. The second positioning groove 63 abuts against the second positioning piece 92 of the metal cover plate 30 to further calibrate the assembly position on the other side of the vertical side, so that the metal cover plate 30 remains horizontal as a whole. This prevents uneven adhesion between the ink layer and the backlight plate 11 due to assembly tilt, which could lead to local light leakage or reflection. In addition, the multi-slot design can adapt to metal cover plates 30 of different sizes, improving the versatility of the outer frame 20.

[0027] like Figure 2As shown, a hollow cavity 31 is provided in the center of the metal cover plate 30, corresponding to the light-emitting area of ​​the backlight plate 11, to avoid obstructing the light-emitting area of ​​the backlight plate 11. Specifically, the hollow cavity 31 in the center of the metal cover plate 30 precisely corresponds to the light-emitting area of ​​the backlight plate 11, achieving unobstructed avoidance of the light-emitting area. Compared with the traditional method of manually applying black glue, which may result in a reduction in the light-emitting area due to application deviation, the hollow cavity 31 is molded to ensure that the avoidance range is completely matched with the light-emitting area, effectively improving the utilization rate of the light-emitting area. At the same time, the edge of the hollow cavity 31 is precisely connected to the boundary of the matte ink layer 12, so that the ink layer only acts on the non-light-emitting area, avoiding the ink layer covering the light-emitting area and affecting the brightness, further optimizing the boundary clarity of the light-emitting effect in the viewing area.

[0028] like Figure 4 As shown, the metal cover plate 30 has a plurality of first inserts 32 on each of its two transverse sides. The plurality of first inserts 32 are used to be inserted into the first slot 41 and the second slot 42 respectively. Two first positioning pieces 33 are provided between the plurality of first inserts 32 on each side. The first positioning pieces 33 are used to position and abut against the first positioning groove 44. The first inserts 32 have a first snap-fit ​​notch 34. The first snap-fit ​​notch 34 is used to be snap-fitted into the first trapezoidal snap-fit ​​protrusion 43 and the second trapezoidal snap-fit ​​protrusion 45 respectively. Specifically, the horizontally arranged first inserts 32 correspond one-to-one with the first slots 41 and second slots 42 of the outer frame 20, ensuring the compatibility of the horizontal assembly of the metal cover plate 30 and avoiding instability in single insert assembly; the first positioning piece 33 abuts against the first positioning groove 44 of the outer frame 20, enabling quick pre-positioning during assembly without repeated adjustments, thus shortening the horizontal assembly time; the engagement structure of the first snap-fit ​​notch 34 with the first trapezoidal snap-fit ​​protrusion 43 and the second trapezoidal snap-fit ​​protrusion 45 is detachable, ensuring both secure fixing and easy disassembly of the metal cover plate 30 during subsequent module maintenance, avoiding the problem of damaging the black adhesive during the maintenance of traditional black adhesive modules, and reducing after-sales costs.

[0029] like Figure 4As shown, the metal cover plate 30 has two second inserts 70 and two third inserts 80 on one vertical side; the two second inserts 70 are used to be inserted into the third slot 51, and the second inserts 70 have a second snap-fit ​​notch 71, which is used to be snap-fitted into the third trapezoidal snap-fit ​​protrusion 52; the two third inserts 80 are located between the two second inserts 70; the third inserts 80 have symmetrically arranged third snap-fit ​​notches 81, which are used to be snap-fitted into the outer trapezoidal snap-fit ​​protrusion 53. Specifically, the second insert 70 engages with the third slot 51 of the outer frame 20, and the second snap-fit ​​notch 71 engages with the third trapezoidal snap-fit ​​protrusion 52, achieving basic fixation on one side of the vertical direction; two third inserts 80 are located between the second inserts 70, and their symmetrical third snap-fit ​​notches 81 engage with the trapezoidal snap-fit ​​protrusion 53 on the outer side of the outer frame 20, forming a structure of auxiliary fixation in the middle and main fixation on both sides, improving the fixation stability on one side of the vertical direction and preventing the metal cover plate 30 from shifting up and down in the vertical direction; in addition, the integrated design of the insert and the snap-fit ​​notch (formed synchronously with the metal cover plate 30) reduces the number of parts and assembly complexity compared to the independent black glue parts when applying black glue manually in the traditional way, further improving production efficiency.

[0030] like Figure 4 As shown, the metal cover plate 30 has a plurality of fourth inserts 90 on its other vertical side. The plurality of fourth inserts 90 are used to be inserted into the fourth slot 61 and the fifth slot 62 respectively. Each fourth insert 90 has a fourth snap-fit ​​notch 91, which is used to be snap-fitted into the fourth trapezoidal snap protrusion 64 and the fifth trapezoidal snap protrusion 65 respectively. A plurality of second positioning pieces 92 are provided between the plurality of fourth inserts 90. The second positioning pieces 92 are used to position and abut against the second positioning groove 63. Specifically, the fourth insert 90 corresponds one-to-one with the fourth slot 61 and the fifth slot 62 of the outer frame 20, adapting to the multi-slot layout of the third flange 60 to ensure precise assembly on the other side of the vertical axis; the fourth snap-fit ​​notch 91 engages with the fourth trapezoidal snap-fit ​​protrusion 64 and the fifth trapezoidal snap-fit ​​protrusion 65 to achieve a firm fixation; several second positioning pieces 92 abut against the second positioning groove 63 of the outer frame 20, which can form multi-point positioning on the other side of the vertical axis, preventing the metal cover plate 30 from tilting due to force on one side, and ensuring that the matte ink layer 12 on the inner side of the metal cover plate 30 is completely bonded to the non-light-emitting area of ​​the backlight plate 11 without gaps or light leakage; at the same time, the cooperation of multiple inserts and multiple positioning grooves further ensures the consistency of the light-emitting effect.

[0031] The working principle of this utility model is as follows: First, the outer frame 20 provides an overall assembly space through the cavity 21 formed by the inner sidewalls. The mounting boss 22 on the bottom wall of the cavity is fixed to the bottom surface of the backlight panel 11 to ensure the stability of the backlight panel 11 within the module and prevent the light transmission path from being affected by the displacement of the backlight panel 11. Subsequently, the metal cover plate 30 is precisely assembled with the outer frame 20 through multi-directional inserts and slots. The first insert 32 on both sides of the lateral side is inserted into the first slot 41 and the second slot 42 respectively. The first positioning piece 33 abuts against the first positioning groove 44 to limit the lateral displacement. The first snap-fit ​​notch 34 is engaged and fixed with the first trapezoidal snap-fit ​​protrusion 43 and the second trapezoidal snap-fit ​​protrusion 45. The second insert 70 on the vertical side is inserted into the third slot 51, and the second snap-fit ​​notch 71 is engaged with the third trapezoidal snap-fit ​​protrusion 52. The third insert 80 is engaged with the outer trapezoidal snap-fit ​​protrusion through the third snap-fit ​​notch 81. The 53 mechanism achieves double fixation; the fourth insert 90 on the other vertical side is inserted into the fourth slot 61 and the fifth slot 62, the second positioning piece 92 abuts against the second positioning groove 63, and the fourth snap-fit ​​notch 91 engages with the fourth and fifth trapezoidal snap-fit ​​protrusions 65. The multi-directional snap-fit ​​and positioning structure ensures that the metal cover plate 30 and the outer frame 20 are firmly assembled and accurately positioned, so that the black UV ink sprayed on the inner side of the metal cover plate 30 can accurately cover the non-light-emitting area of ​​the backlight plate 11; the hollow cavity 31 in the center of the metal cover plate 30 accurately avoids the light-emitting area of ​​the backlight plate 11, avoiding blocking the effective light; finally, the matte ink layer 12 reduces reflection and light leakage in the non-light-emitting area by homogenizing the stray light in the viewing area, optimizing the uniformity of light emission and brightness consistency in the viewing area. At the same time, the ink layer formed by the inkjet process adheres stably and does not require manual application, which greatly improves production efficiency and reduces costs.

[0032] The above description merely illustrates the preferred technical solution of this utility model, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A backlight module with optimized light emission effect, characterized in that, The module includes a main body, which comprises a backlight panel, an outer frame, and a metal cover plate. The backlight panel is embedded and fixed inside the outer frame. The metal cover plate covers the upper edge of the backlight panel. The outer frame and the metal cover plate are detachably snap-fitted together. The surface of the metal cover plate facing the backlight panel is coated with a matte ink layer, which is used to homogenize the light distribution in the viewing area to optimize the uniformity of light emission and brightness consistency in the viewing area of ​​the main body of the module.

2. The backlight module with optimized light emission effect according to claim 1, characterized in that, The matte ink layer is a black UV ink layer.

3. The backlight module with optimized light emission effect according to claim 1, characterized in that, The inner sidewall of the outer frame encloses a receiving cavity, and the bottom wall of the receiving cavity is provided with a mounting boss; the top surface of the mounting boss is in contact with the bottom surface of the backlight panel, and the mounting boss is installed and connected to the backlight panel.

4. The backlight module with optimized light emission effect according to claim 3, characterized in that, The receiving cavity has a first flange on each of its two transverse sides for abutting against the metal cover plate. Each first flange has a first slot and a second slot on its top surface. The first slot has a first trapezoidal protrusion on the side wall near the mounting boss. There are two second slots, which are respectively located on both sides of the first slot. Each second slot has a first positioning groove on the side near the first slot, and each second slot has a second trapezoidal protrusion on the side wall near the mounting boss.

5. The backlight module with optimized light emission effect according to claim 3, characterized in that, The vertical side of the receiving cavity is provided with a second flange for abutting against the metal cover plate. A third slot is provided on both sides of the second flange. A third trapezoidal protrusion is provided on the side wall of each third slot near the mounting boss. An outer trapezoidal protrusion is provided at both outer ends of the second flange.

6. The backlight module with optimized light emission effect according to claim 3, characterized in that, The other vertical side of the receiving cavity is provided with a third flange for abutting against the metal cover plate. The top surface of the third flange is provided with a fourth slot and a fifth slot. There are three fourth slots, which are located in the center of the third flange. A second positioning groove is provided on one side of each fourth slot, and a fourth trapezoidal locking protrusion is provided on the side wall of each fourth slot near the mounting boss. There are two fifth slots, which are respectively located on both sides of the three fourth slots. A fifth trapezoidal locking protrusion is provided on the side wall of each fifth slot near the mounting boss.

7. The backlight module with optimized light emission effect according to claim 1, characterized in that, The metal cover has a hollow cavity in the center that corresponds to the backlight area, in order to avoid blocking the backlight area.

8. The backlight module with optimized light emission effect according to claim 7, characterized in that, The metal cover plate has several first inserts on its two lateral sides, which are used to be inserted into the first slot and the second slot respectively. Two first positioning pieces are provided between the first inserts on each side, which are used to be positioned and abut against the first positioning groove. The first inserts have first snap-fit ​​notches, which are used to be snap-fitted into the first trapezoidal snap protrusion and the second trapezoidal snap protrusion respectively.

9. The backlight module with optimized light emission effect according to claim 7, characterized in that, The metal cover plate has two second inserts and two third inserts on one vertical side; the two second inserts are used to engage with the third slots, and the second inserts have second snap-fit ​​notches for engaging with the third trapezoidal protrusions; the two third inserts are located between the two second inserts; the third inserts have symmetrically arranged third snap-fit ​​notches for engaging with the outer trapezoidal protrusions.

10. The backlight module with optimized light emission effect according to claim 7, characterized in that, The metal cover plate has a plurality of fourth inserts on its other vertical side, which are used to be inserted into the fourth slot and the fifth slot respectively; each of the fourth inserts has a fourth snap-fit ​​notch, which is used to be snap-fitted into the fourth trapezoidal snap protrusion and the fifth trapezoidal snap protrusion respectively; a plurality of second positioning pieces are provided between the plurality of fourth inserts, which are used to be positioned and abutted against the second positioning groove.

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