Light source module, backlight module and display device

Abstract

The utility model relates to a light source module, backlight module and display device. A kind of light source module includes a substrate, a reflecting unit, and multiple light emitting components. The reflecting unit includes a bottom wall, multiple first side walls arranged along a first direction, multiple second side walls arranged along a second direction, and multiple reflecting baffles. The first side walls and the second side walls are arranged alternately and form a missing slot at each interface, and the bottom wall has multiple through holes communicating with the corresponding missing slots. The reflecting baffles are arranged at the interface of the first side walls and the second side walls, and the reflecting baffles and the corresponding through holes are located on the opposite sides of the corresponding missing slots. The light emitting components are respectively inserted into the corresponding through holes and exposed in the corresponding missing slots. In this way, the light uniformity is improved and the brightness difference is reduced. The utility model also provides a backlight module and a display device comprising the light source module.

Description

Technical Field

[0001] This utility model relates to an optical device, and more particularly to a light source module, a backlight module, and a display device that can improve the uniformity of light output. Background Technology

[0002] A backlight module display (UPD) is a display that uses a backlight source to provide brightness, such as an LCD. Since liquid crystals themselves do not emit light, they must be illuminated by a backlight source (such as an LED). The light is then evenly distributed to the liquid crystal layer via optical components such as light guide plates, diffusers, and polarizers to display the image. Therefore, the design of the backlight module has a crucial impact on display brightness, uniformity, and color performance.

[0003] For direct-lit monitors, the light-emitting surface can suffer from grid mura and halo effects. Grid mura causes grid-like brightness differences when displaying images at low to medium grayscale levels. Halo effect refers to unnatural halos or glowing edges around bright areas, especially in high-contrast images (such as white objects on a black background), where a ring of light diffuses around the bright areas, appearing like a "halo" or "light leakage."

[0004] Therefore, improving the optical design to mitigate these problems and enhance the optical quality of displays is the goal that manufacturers are striving for. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a light source module that can optimize the light emission effect, as well as a backlight module and a display device including the light source module.

[0006] To achieve the aforementioned objective, this utility model discloses a light source module comprising a substrate, a reflective unit disposed on the substrate, and a plurality of light-emitting elements disposed on the substrate. The reflective unit includes a bottom wall disposed on the substrate, a plurality of first sidewalls disposed on the bottom wall along a first direction, a plurality of second sidewalls disposed on the bottom wall along a second direction, and a plurality of reflective baffles, wherein the first direction is not parallel to the second direction. The first sidewalls and second sidewalls are staggered and form a notch at each junction. The bottom wall has a plurality of spaced-apart perforations communicating with corresponding notches. The reflective baffles are disposed at the junctions of the first and second sidewalls, and each reflective baffle and each corresponding perforation are located on opposite sides of each corresponding notch. The light-emitting elements extend through the corresponding perforations and are exposed within the corresponding notches.

[0007] Another technical means of this utility model is that the first sidewall and the second sidewall are staggered and surround multiple reflective spaces. Each of the reflective baffles has multiple corners and multiple regions. Each corner is located in a corresponding region, and each region extends into adjacent different reflective spaces.

[0008] Another technical means of this utility model is that each of the reflection spaces has at least one first reflection surface formed on the reflection baffle and facing the bottom wall, a plurality of second reflection surfaces formed on the first side wall and the second side wall respectively and facing the same reflection space, and a third reflection surface formed on the bottom wall.

[0009] Another technical means of this utility model is that the first reflective surface is an arc-shaped or inclined surface that convexes toward the light-emitting element.

[0010] Another technical means of this utility model is that the third reflective surface is a plane or an arc-convex surface convex to the substrate.

[0011] Another technical means of this utility model is that the thickness of each first sidewall and each second sidewall gradually decreases in the direction away from the bottom wall, so that in the same reflection space, the angle between each second reflecting surface and the third reflecting surface is greater than or equal to 90 degrees.

[0012] Another technical aspect of this invention is that each of the reflective baffles is opaque.

[0013] Another technical aspect of this invention is that the reflective baffle is connected to at least one of the first sidewall or the second sidewall.

[0014] Another objective of this invention is to provide a backlight module comprising a light source module as described above, and an optical unit disposed on the light source module.

[0015] Another technical aspect of this invention is that the optical unit includes a diffuser plate located on the light-emitting side of the light source module, and a plurality of optical films stacked on the diffuser plate.

[0016] Another objective of this invention is to provide a display device comprising a backlight module as described above, and a display panel disposed on the backlight module.

[0017] The advantage of this invention is that by using the reflective baffle to block the forward light of each light-emitting element, and by placing each light-emitting element at the junction, multiple reflections of the light from the light-emitting element are achieved through the bottom wall, the first side wall, and the second side wall, thereby improving the uniformity of light emission and reducing the difference between bright and dark areas. Attached Figure Description

[0018] Figure 1 This is an exploded three-dimensional view, which is a preferred embodiment of the light source module of this utility model; Figure 2 It is a magnified view of a part, illustrating the detailed structure of a reflective unit; Figure 3 This is a magnified view of a portion of the image, illustrating... Figure 1 The combined structure; Figure 4 This is a sectional view from one side, for illustrative purposes. Figure 3 ; Figure 5 This is a sectional view from one side, illustrating another aspect of the preferred embodiment; Figure 6 This is a perspective view, representing a preferred embodiment of the backlight module of this utility model; and Figure 7 This is a perspective view, which is a preferred embodiment of the display device of this utility model. Detailed Implementation

[0019] The features and technical content of this utility model will be clearly presented in the following detailed description of the preferred embodiments with reference to the accompanying drawings. Before the detailed description, it should be noted that similar elements are represented by the same numbers. Furthermore, directional terms mentioned in the following embodiments, such as up, down, left, right, front, back, bottom, and top, are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the utility model.

[0020] See Figure 1 This is a preferred embodiment of the light source module 2 of the present invention, comprising a substrate 3, a reflective unit 4 disposed above the substrate 3, and a plurality of light-emitting elements 5 disposed on the substrate 3. (See reference...) Figure 2 The reflective unit 4 includes a bottom wall 41, a plurality of first side walls 42 disposed on the bottom wall 41 along a first direction D1, a plurality of second side walls 43 disposed on the bottom wall 41 along a second direction D2, and a plurality of reflective baffles 44. The first direction D1 is not parallel to the second direction D2. The first side walls 42 and second side walls 43 are staggered, forming a notch 45 at each junction. The bottom wall 41 has a plurality of spaced-apart perforations 411, which communicate with corresponding notches 45. The reflective baffles 44 are disposed at the junctions of the first side walls 42 and the second side walls 43, and each reflective baffle 44 and each corresponding perforation 411 are located on opposite sides of each corresponding notch 45. Figure 3 As shown, the light-emitting element 5 is respectively inserted through the corresponding perforation 411 and exposed in the corresponding notch 45.

[0021] The reflective baffle 44 is used to block the forward light of each light-emitting element 5, thereby avoiding the occurrence of halo effect and improving the uniformity of light output.

[0022] Please continue reading. Figure 3 The first sidewall 42 and the second sidewall 43 are staggered and surround multiple reflection spaces 46. The reflective baffle 44 is connected to at least one of the first sidewall 42 or the second sidewall 43. This design provides a stable structural support while ensuring that no displacement or deformation occurs during use, maintaining stable optical performance. This connection design also simplifies the manufacturing process, allowing the entire reflective unit 4 to be manufactured as a single piece, reducing production costs and improving product reliability.

[0023] Each of the aforementioned reflective baffles 44 has multiple regions 441 and multiple corners 442, each corner 442 being located within a corresponding region 441, and each region 441 extending into adjacent different reflective spaces 46. In this embodiment, each of the aforementioned reflective baffles 44 has four regions 441 and four corners 442, the four regions 441 extending into four adjacent different reflective spaces 46. See also... Figure 4 Each of the aforementioned reflection spaces 46 has at least one first reflective surface 461 formed on the reflective baffle 44 and facing the bottom wall 41, a plurality of second reflective surfaces 462 respectively formed on the first side wall 42 and the second side wall 43 and facing the same reflection space 46, and a third reflective surface 463 formed on the bottom wall 41. Through the at least one first reflective surface 461 formed on the reflective baffle 44 and facing the bottom wall 41, the plurality of second reflective surfaces 462 respectively formed on the first side wall 42 and the second side wall 43 and facing the same reflection space 46, and the third reflective surface 463 formed on the bottom wall 41, multiple reflections of the light from the light-emitting element 5 are achieved. The light reflection effect is used to compensate for the decrease in brightness caused by the light-emitting element 5 being blocked by the reflective baffle 44, thereby preventing the appearance of dark areas and improving the uniformity of light emission.

[0024] More specifically, each first reflective surface 461 is the surface of one region 441 of each of the reflective baffles 44. Therefore, each of the reflective baffles 44 has four first reflective surfaces 461, which are respectively placed in four adjacent different reflection spaces 46. The light emitted by each light-emitting element 5 is uniformly reflected into the four different reflection spaces 46 around the light-emitting element 5. This allows a single reflective baffle 44 to affect multiple adjacent reflection spaces 46 at the same time, achieving better control of light uniformity and effectively improving the grid mura phenomenon that is easily generated in traditional designs.

[0025] In this embodiment, the light-emitting element 5 is a cube, so its top surface and four sides emit light. By placing the light-emitting element 5 at the junction of the first sidewall 42 and the second sidewall 43, and placing the opaque reflective baffle 44 above the light-emitting element 5, the direct light (light from the top surface) of the light-emitting element 5 can be blocked, reducing the excessive brightness above the light-emitting element 5. Simultaneously, the light blocked by the reflective baffle 44 is reflected by the first reflective surface 461 formed on the reflective baffle 44. Since the four regions 441 of each reflective baffle 44 extend into four adjacent different reflection spaces 46, the light reflected by the first reflective surface 461 is also dispersed into the adjacent reflection spaces 46. More specifically, a portion of the light emitted from the top surface of the light-emitting element 5 is reflected by the first reflective surface 461 of the reflective baffle 44 to the third reflective surface 463 of the bottom wall 41, and then reflected again by the third reflective surface 463 before being emitted upwards; another portion of the light emitted from the top surface of the light-emitting element 5 is reflected by the first reflective surface 461 of the reflective baffle 44 to the second reflective surfaces 462 of the first sidewall 42 and the second sidewall 43, and then reflected again by the second reflective surface 462 before being emitted upwards; or another portion of the light emitted from the top surface of the light-emitting element 5 is reflected by the first reflective surface 461 to the second reflective surfaces 462 of the first sidewall 42 and the second sidewall 43, then reflected to the third reflective surface 463 of the bottom wall 41, and finally reflected again by the third reflective surface 463 before being emitted upwards. Furthermore, light emitted from the side of the light-emitting element 5 can be reflected upwards by the third reflective surface 463, reflected upwards by the second reflective surface 462 of the first sidewall 42 and the second sidewall 43, or reflected upwards by the second reflective surface 462 of the first sidewall 42 and the second sidewall 43 to the third reflective surface 463, and then reflected upwards. It should be noted that the aforementioned light reflection sequence is only one possibility, and the order is not fixed. The first reflective surface 461, the second reflective surface 462, and the third reflective surface 463 cooperate to reflect light before it is emitted. Through the cooperation of the three reflective surfaces 461, 462, and 463, multiple light reflection effects can be achieved, improving the utilization rate of light. Figure 3As shown, taking a single light-emitting element 5 as an example, since it is located at the intersection of four different reflection spaces 46, and the direct light from its top surface is also blocked, its light is reflected and dispersed into the four different reflection spaces 46. This reduces the probability of a single light-emitting element 5 being too bright and producing a hotspot or halo effect. Each reflection space 46 can converge the local light from the light-emitting elements 5 located at the four vertices, and use the reflection effect to compensate for the brightness reduction caused by the blocking of the light-emitting elements 5 directly above them, making the overall light more uniform and reducing the brightness difference of the light-emitting surface.

[0026] like Figure 4 As shown, in this embodiment, the first reflective surface 461 is an arcuate surface convex towards the light-emitting element 5, and the angle between each second reflective surface 462 and the third reflective surface 463 is equal to 90 degrees. However, in some embodiments, such as... Figure 5 As shown, the first reflective surface 461 can also be an inclined surface convex towards the light-emitting element 5 (i.e., inclined towards the light-emitting element 5). The arc-convex surface design provides a smoother light reflection effect, while the inclined surface design allows for adjustment of the reflection angle according to specific optical requirements. More specifically, the thickness of each first sidewall 42 and each second sidewall 43 gradually decreases away from the bottom wall 41 (only the thickness of the second sidewall 43 is shown due to the viewing angle), so that in the same reflection space 46, the angle between each second reflective surface 462 and the third reflective surface 463 is greater than 90 degrees. This gradual thickness design not only helps in manufacturing but, more importantly, ensures the optimization of the reflection angle, avoiding unnecessary light loss or adverse optical effects during reflection. When the angle is greater than 90 degrees, it ensures that after being reflected by the second reflective surface 462, the light can smoothly exit upwards without causing reflections or other adverse phenomena that reduce light utilization efficiency in the reflection space 46. Furthermore, the third reflective surface 463 can also be an arcuate surface convex towards the substrate 3 (i.e., a downwardly recessed shape) to further optimize the light distribution characteristics. In other words, the reflection space 46 formed by the first sidewall 42, the second sidewall 43 (i.e., the second reflective surface 462), and the bottom wall 41 (i.e., the third reflective surface 463) is generally a structure with an opening area greater than or equal to the bottom area. Through this angle design, the light extraction efficiency can be maximized.

[0027] In addition, in this embodiment, the first sidewall 42 and the second sidewall 43 are arranged in a square grid at right angles to each other. In actual implementation, the angle between the first sidewall 42 and the second sidewall 43 can be changed as needed so that each reflection space 46 is a polygon (e.g., a triangle), and the light-emitting element 5 is located at the vertex of the polygon.

[0028] See Figure 6 An optical unit 6 is disposed on the light source module 2, which constitutes a backlight module. The optical unit 6 may include a diffuser plate 61 and a plurality of optical films 62 stacked on the diffuser plate 61. The backlight module may also include a front frame 63 and a back frame 64 that jointly position the light source module 2 and the optical unit 6. (See reference...) Figure 7 A display panel 7 is provided on the backlight module, which is a display device.

[0029] In summary, the light source module 2 of this utility model utilizes the reflective baffle 44 to shield the forward light of each light-emitting element 5, and each light-emitting element 5 is disposed at the junction. Through the reflective baffle 44, bottom wall 41, first side wall 42, and second side wall 43, multiple reflections of the light from the light-emitting element 5 are achieved, reducing the forward light of a single light-emitting element 5, making the overall light more uniform, and reducing the brightness difference of the light-emitting surface. This effectively achieves the purpose of this utility model.

[0030] However, the above description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. All simple equivalent changes and modifications made in accordance with the claims and description of the present utility model shall still fall within the scope of the present utility model patent.

[0031] [Symbol Explanation] 2 light source modules 3 substrate 4 reflective units 41 bottom wall 411 perforation 42 First sidewall 43 Second sidewall 44 reflective baffles Area 441 442 corner 45 Missing slot 46 Reflection Space 461 First reflecting surface 462 Second Reflector 463 Third Reflector 5 light-emitting components 6 optical units 61 diffuser plate 62 Optical Films 63 front frame 64 Back Frame 7 Display Panel D1 First Direction D2 Second Direction.

Claims

1. A light source module, characterized by Include: substrate; A reflective unit includes a bottom wall disposed on a substrate, a plurality of first sidewalls disposed on the bottom wall along a first direction, a plurality of second sidewalls disposed on the bottom wall along a second direction, and a plurality of reflective baffles, wherein the first direction is not parallel to the second direction, the first sidewalls and second sidewalls are staggered and form a notch at each junction, the bottom wall has a plurality of spaced-apart perforations communicating with corresponding notches, the reflective baffles are disposed at the junctions of the first sidewalls and second sidewalls, and each reflective baffle and each corresponding perforation are located on opposite sides of each corresponding notch; and Multiple light-emitting elements are disposed on the substrate and extend through corresponding through holes and exposed in corresponding notches.

2. The light source module of claim 1, wherein The first sidewall and the second sidewall are staggered and surround multiple reflective spaces. Each reflective baffle has multiple corners and multiple regions. Each corner is located in a corresponding region, and each region extends into adjacent different reflective spaces.

3. The light source module as described in claim 2, characterized in that, Each of the reflected spaces has at least one first reflective surface formed on the reflective baffle and facing the bottom wall, a plurality of second reflective surfaces formed on the first sidewall and the second sidewall respectively and facing the same reflected space, and a third reflective surface formed on the bottom wall.

4. The light source module of claim 3, wherein the light source module is configured to be mounted on a printed circuit board (PCB) of a display device. The first reflective surface is an arcuate or inclined surface that convexes toward the light-emitting element.

5. The light source module of claim 3, wherein the light source module is configured to be mounted on a printed circuit board (PCB) of a display device. The third reflective surface is either a flat surface or an arc-convex surface convex to the substrate.

6. The light source module of claim 3, wherein the light source module is configured to be mounted on a printed circuit board (PCB) of a display device. The thickness of each of the first sidewalls and each of the second sidewalls gradually decreases away from the bottom wall, so that in the same reflection space, the angle between each of the second reflecting surfaces and the third reflecting surface is greater than or equal to 90 degrees.

7. The light source module of claim 1, wherein the light source module is configured to be mounted on a printed circuit board (PCB) of a display device. Each of the aforementioned reflective baffles is opaque.

8. The light source module as described in claim 1, characterized in that, The reflective baffle is connected to at least one of the first sidewall or the second sidewall.

9. A backlight module, characterized in that, Include: The light source module as described in any one of claims 1 to 8; and An optical unit is mounted on the light source module.

10. The backlight module of claim 9, wherein, The optical unit includes a diffuser plate located on the light-emitting side of the light source module, and multiple optical films stacked on the diffuser plate.

11. A display device, characterized by comprising: It includes the backlight module as described in claim 9, and the display panel disposed on the backlight module.

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