Backlight module

Abstract

The utility model provides a backlight module and relates to the technical field of optical display. The backlight module comprises a partition plate, a light splitting groove in a hollow inverted quadrangular frustum pyramid shape is formed, an opening is formed in the bottom of the light splitting groove, and the bottom face of the partition plate is attached to the circuit board. The tops of the lamp beads penetrate through the open holes to be exposed out of the middles of the light splitting grooves, the lamp beads and the light splitting grooves are arranged in a one-to-one correspondence mode, each lamp bead comprises at least one reflection groove and at least one light-emitting body, the light-emitting bodies are arranged at the bottoms of the reflection grooves, and light rays of the light-emitting bodies are scattered to the partition plate through the reflection grooves; and the circuit board is arranged on the bottom surface of the partition board and is connected and attached to the lamp beads. According to the backlight module, an effective light area can be increased, and the advancing direction of light rays is controlled through the arrangement of the lamp beads and the light splitting grooves, so that halo energy is effectively converged, halo interference in a large range is avoided, and the backlight module with more optimized picture color contrast is obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical display, and in particular relates to a backlight module. Background Art

[0002] In the field of optical display technology, the backlight module is an important component of display devices such as liquid crystal displays. Its main function is to provide a uniform backlight with moderate brightness for the display panel.

[0003] Traditional backlight modules usually use side-entry or direct-down LED lamp beads as light sources, and evenly disperse the light to the entire display area through a light guide plate or partition plate and a diffuser plate to form a surface light source. However, the light from the side-entry LED lamp beads is prone to attenuation and loss when propagating in the middle, resulting in lower brightness in the edge area and an inability to achieve a uniform backlight effect. Secondly, although direct-down LED lamp beads can provide a more uniform backlight, due to the optical characteristics of the LED lamp beads themselves, the light they emit often has a strong directionality, which can easily cause local overbrightness or overdarkness, affecting the picture display effect of the backlight module. In addition, since the surface light source cannot achieve block control of the picture, the color contrast of the picture display is low and the improvement is extremely limited. Utility Model Content

[0004] One purpose of the utility model is to provide a light modular backlight module to solve the technical problem of limited improvement of the color contrast of the display picture of the backlight module in the prior art.

[0005] Another purpose of the utility model is to reduce the halo interference of the backlight module.

[0006] According to the purpose of the utility model, the utility model provides a backlight module, including:

[0007] A partition plate is formed with a light splitting groove in the shape of a hollow inverted quadrangular pyramid, an opening is provided at the bottom of the light splitting groove, and the bottom surface of the partition plate is attached to the circuit board;

[0008] A lamp bead, the top of which passes through the opening and is exposed in the middle of the structure, and is arranged one-to-one with the light splitting grooves, the lamp bead comprises at least one reflecting groove and at least one illuminant, the illuminant is arranged at the bottom of the reflecting groove, so that the light of the illuminant is diffused to the surroundings through the reflecting groove to the partition plate;

[0009] The circuit board is arranged on the bottom surface of the partition board and is connected to the lamp beads.

[0010] Optionally, the lamp bead further includes:

[0011] A reflector having an L-shaped structure, the reflector comprising a horizontal wall and a vertical wall, and the light emitter is located on the horizontal wall;

[0012] The light-transmitting member is arranged in the vertical direction and abuts against the edge of the transverse wall. The light-transmitting member and the reflective member are arranged to form the reflective groove.

[0013] Optionally, there are two reflective grooves, each of which contains a light-emitting body, and the two reflective grooves are symmetrically arranged.

[0014] Optionally, the reflective groove of the lamp bead is filled with a filler, and the surface of the filler is coated with diffusion powder.

[0015] Optionally, the beam splitter groove is formed by cutting and splicing.

[0016] Optionally, it also includes:

[0017] The spectrometer comprises a base plate and a plurality of spectrometer blocks in a triangular pyramid structure. The bottom of the base plate abuts against the top of the partition plate. The plurality of spectrometer blocks are arranged on the top of the base plate, and a spectrometer area is formed between two adjacent spectrometer blocks to effectively distribute the distribution area of ​​the light.

[0018] Optionally, the orthographic projection of the light splitting block on the base plate is a non-equilateral triangle.

[0019] Optionally, the included angle between two adjacent light splitting blocks of the light splitting plate is any value in the range of 10°-180°.

[0020] Optionally, it also includes:

[0021] The diffusion plate is located on the top of the partition plate to make the light distribution uniform.

[0022] Optionally, there are multiple light splitting slots distributed in a rectangular array.

[0023] The backlight module of the utility model arranges lamp beads and the splitter grooves of the partition plate in correspondence, and sets a reflection groove inside the lamp beads and a light-emitting body located at the bottom of the reflection groove, so that the light of the light-emitting body is reflected by the reflection groove and diverges to the surrounding area to the splitter groove in the shape of a hollow inverted quadrangular pyramid, and is reflected by the inner wall of the splitter groove to the top exit of the partition plate, so as to increase the effective light area of ​​the backlight module, and control the travel direction of the light by setting the splitter groove, so as to effectively converge the halo energy and avoid the generation of halo interference in a larger range, thereby forming an independent light module, and obtaining a backlight module with more optimized picture color contrast.

[0024] Furthermore, the backlight module of the utility model also includes a beam splitter plate, which includes a base plate and a plurality of beam splitter blocks in the shape of triangular pyramids. The bottom of the base plate is abutted against the top of the partition plate. The plurality of beam splitter blocks are arranged on the top of the base plate, and a beam splitter area is formed between two adjacent beam splitter blocks to increase the light distribution area, thereby increasing the light source distribution of the light source of the light-emitting body and converging the light emitting angle of the backlight module to reduce the interference of halo diffusion, thereby enhancing the effect of the light module and improving the brightness of the backlight module.

[0025] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0027] Figure 1 is a schematic structural diagram of a backlight module according to an embodiment of the utility model;

[0028] Figure 2 is a schematic structural diagram of a lamp bead according to an embodiment of the utility model;

[0029] Figure 3 This is a schematic installation diagram of a lamp bead and a partition plate according to an embodiment of the utility model;

[0030] Figure 4 is a schematic top view of a beam splitter according to an embodiment of the utility model;

[0031] Figure 5 is a schematic front view of a beam splitter according to an embodiment of the utility model;

[0032] Figure 6 is a schematic structural diagram of a backlight module according to another embodiment of the utility model;

[0033] Figure 7 is a schematic top view of a diffuser plate according to another embodiment of the utility model;

[0034] Figure 8 is a schematic front view of a diffuser plate according to another embodiment of the utility model;

[0035] Fig. 9 It is a schematic structural diagram of a partition plate according to an embodiment of the utility model.

[0036] Reference numerals:

[0037] 100-backlight module, 10-partition plate, 20-circuit board, 30-lamp beads, 40-beam splitter plate, 50-diffuser plate, 11-beam splitter groove, 12-opening, 31-reflection groove, 32-illuminant, 33-reflector, 34-light-transmitting member, 35-filler, 36-diffuser powder, 331-horizontal wall, 332-vertical wall, 41-bottom plate, 42-beam splitter block, 43-beam splitter area. DETAILED DESCRIPTION

[0038] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In particular, the utility model provides a backlight template, which is used to supply a light source with sufficient brightness and uniform distribution, so that a liquid crystal display panel can achieve light modularization and light source block control.

[0043] Figure 1 is a schematic structural diagram of a backlight module according to an embodiment of the utility model, Figure 2is a schematic structural diagram of a lamp bead according to an embodiment of the utility model, Figure 3 It is a schematic installation diagram of lamp beads and partition plates according to an embodiment of the utility model.

[0044] like Figures 1 to 3 As shown, the utility model provides a backlight module 100, which includes a partition plate 10, a lamp bead 30 and a circuit board 20. The partition plate 10 is formed with a hollow inverted quadrangular pyramid-shaped splitter groove 11, and an opening 12 is provided at the bottom of the splitter groove 11. The bottom surface of the partition plate 10 is attached to the circuit board 20. The top of the lamp bead 30 passes through the opening 12 and is exposed in the middle of the splitter groove 11, and is arranged one-to-one with the splitter groove 11. The lamp bead 30 includes at least one reflective groove 31 and at least one illuminant 32. The illuminant 32 is arranged at the bottom of the reflective groove 31, so that the light of the illuminant 32 is diffused to the partition plate 10 through the reflective groove 31. The circuit board 20 is arranged at the bottom surface of the partition plate 10 and is connected to the lamp bead 30. Here, the partition plate 10 is made of a reflective film material, and the number of the splitter grooves 11 formed by the partition plate 10 can be one or more. The circuit board 20 provides power for the lamp bead 30, and the illuminant 32 is an LED chip.

[0045] The backlight module 100 of the present embodiment arranges the lamp beads 30 corresponding to the dichroic grooves 11 of the partition plate 10, and sets a reflective groove 31 inside the lamp beads 30 and a light-emitting body 32 located at the bottom of the reflective groove 31, so that the light of the light-emitting body 32 is reflected through the reflective groove 31 to the dichroic groove 11 in the shape of a hollow inverted quadrangular pyramid, and is reflected through the inner wall of the dichroic groove 11 to the top exit of the partition plate 10, so as to increase the effective light area of ​​the backlight module 100, and control the traveling direction of the light through the setting of the dichroic groove 11, so as to effectively converge the halo energy and avoid the generation of halo interference in a larger range, so that the backlight module 100 forms light modularization, and then forms a backlight module 100 with higher color contrast.

[0046] In this embodiment, the partition plate 10 includes a beam splitter slot 11, each beam splitter slot 11 is arranged in one-to-one correspondence with a lamp bead 30, and the lamp bead 30 is located at the opening 12 at the bottom of the beam splitter slot 11, so that the lamp bead 30 passes through the opening 12 and is connected to the circuit board 20, so that the circuit board 20 provides power for the lamp bead 30. Specifically, the bottom surface of the beam splitter slot 11 and the bottom surface of the lamp bead 30 are both attached to the circuit board 20, and the height of the beam splitter slot 11 is greater than the height of the lamp bead 30, so that after the light of the lamp bead 30 is diverged to the surroundings to the beam splitter slot 11, it is reflected by the inner wall of the beam splitter slot 11 to the top outlet of the beam splitter slot 11, forming light with uniform brightness distribution, thereby effectively converging the halo energy and avoiding the generation of halo interference in a larger range.

[0047] In this embodiment, the lamp bead 30 also includes a reflective component 33 and a light-transmitting component 34. The reflective component 33 is an L-shaped structure. The reflective component 33 includes a horizontal wall 331 and a vertical wall 332. The light-emitting body 32 is located on the horizontal wall 331. The light-transmitting component 34 is arranged in the vertical direction and abuts against the edge of the horizontal wall 331. The light-transmitting component 34 and the reflective component 33 are arranged to form a reflecting groove 31, so that the light of the light-emitting body 32 is reflected to the light-transmitting component 34 and the top of the reflecting groove 31 through the horizontal wall 331 and the bottom wall of the reflective component 33, so that the light of the light-emitting body 32 can be emitted from the top and side of the lamp bead 30, thereby increasing the light-emitting angle of the lamp bead 30 and effectively increasing the effective light area of ​​the backlight module 100.

[0048] In this embodiment, there are two reflective grooves 31, each of which is provided with a light emitter 32, and the two reflective grooves 31 are symmetrically arranged. Specifically, the reflective members 33 of the two reflective grooves 31 are symmetrically arranged, that is, the vertical walls 332 of the two reflective members 33 are abutted to isolate the light of the two light emitters 32 in the two reflective grooves 31 in the same lamp bead 30. In other words, the light of the two light emitters 32 in the lamp bead 30 is reflected to the corresponding light-transmitting member 34 through the corresponding reflective member 33, so that the two light rays in the lamp bead 30 are respectively emitted from the side walls of the lamp bead 30, thereby increasing the light-emitting angle of the lamp bead 30.

[0049] In this embodiment, the reflective groove 31 of the lamp bead 30 is filled with a filler, and the surface of the filler is coated with diffusion powder. Specifically, the filler includes silica gel and phosphor, and the diffusion powder is titanium dioxide. Among them, the phosphor is used for color conversion of light, and the silica gel is used to protect and improve the quality of light, so that the lamp bead can emit high-quality and high-stability light.

[0050] like Figure 1 As shown, in this embodiment, the upper surface of the lamp bead 30 is coated with titanium dioxide, which can effectively suppress the light intensity at the center of the lamp bead 30, and reflect the light reflected to the titanium dioxide by the reflector 33 into the reflective groove 31 for reuse. The light travel path is changed by the reflector 33 and penetrates the light-transmitting member 34, so that the energy around the lamp bead 30 is increased and the light-emitting angle of the lamp bead 30 is increased, so that the light-emitting angle of the lamp bead 30 is greater than 180°, thereby effectively shortening the optical distance, increasing the halo range of the lamp bead 30, and widening the distance between the lamp beads 30, reducing the number of lamp beads 30, reducing energy consumption, and avoiding the problem of excessive temperature caused by too many lamp beads 30.

[0051] like Figure 3As shown, in this embodiment, the dichroic groove 11 is formed by cutting and splicing. Specifically, by cutting, bending and splicing the reflective film material, and then fixing and combining it with optical-grade ultraviolet glue, a dichroic groove 11 in the shape of a hollow inverted quadrangular pyramid is obtained, which can effectively converge the halo energy of the light source 32 located at the opening 12 at the bottom of the dichroic groove 11 and reduce halo interference. The dichroic groove 11 of this embodiment is physically formed without changing the properties of the reflective film material itself, and can retain 95-98% of the reflectivity of the reflective film material itself, which is simple to operate and low in cost.

[0052] Figure 4 is a schematic top view of a beam splitter according to an embodiment of the utility model, Figure 5 It is a schematic front view of a beam splitter according to an embodiment of the utility model.

[0053] like Figures 4 to 5 As shown, in this embodiment, the backlight module 100 also includes a beam splitter plate 40, which includes a bottom plate 41 and a plurality of beam splitters 42 in a triangular pyramid structure. The bottom of the bottom plate 41 abuts against the top of 10, and the plurality of beam splitters 42 are arranged on the top of the bottom plate 41, and a beam splitter area 43 is formed between two adjacent beam splitters 42 to effectively distribute the distribution area of ​​the light. Specifically, 10 is located at the bottom of the bottom plate 41 of the beam splitter plate 40, and the top of 10 abuts against the bottom of the bottom plate 41 of the beam splitter plate 40, so that the light of the lamp bead 30 is reflected to the top of the partition plate 10 through the beam splitter groove 11 of the partition plate 10, and then forms a light with uniform brightness through the beam splitter area 43 of the beam splitter plate 40, so that the light source distribution of the light source 32 is increased, and at the same time, the light output angle of the backlight module 100 can be converged to reduce the interference of halo diffusion, strengthen the effect of the light module, and improve the brightness of the backlight module 100.

[0054] In this embodiment, the positive projection of the light splitting block 42 on the bottom plate 41 is a non-equilateral triangle. Specifically, the light splitting block 42 is a non-equilateral triangular pyramid structure, which can not only evenly diverge the optical fiber, but also reduce the dark area between the lamp beads 30 until the dark area is eliminated. Here, the structure of the light splitting block 42 can be designed according to demand to adapt to the formation of dark areas of different areas between the lamp beads 30, so as to avoid the mismatch between the increased volume of the light splitting block 42 with the regular triangular pyramid structure and the increased number of lamp beads 30.

[0055] In this embodiment, the angle between two adjacent splitter blocks 42 of the splitter plate 40 is any value in the range of 10°-180°. Specifically, the angle between two adjacent splitter blocks 42 can be 10°, 60°, 120° or 180°, or any other value in the range of 10°-180°. In other words, by using multiple splitter plates 40 to diffuse the light emitted by the lamp beads 30 in different directions, the dark areas between the lamp beads 30 can be eliminated, and the distance between the lamp beads 30 and the splitter plates 40 can be reduced as much as possible, thereby reducing the thickness of the backlight module 100, making the backlight module 100 lighter and thinner. Here, the angle between two adjacent splitter blocks 42 can be adaptively adjusted according to the light diffusion angle and the area of ​​the dark areas between the lamp beads 30.

[0056] Figure 6 is a schematic structural diagram of a backlight module according to another embodiment of the utility model, Figure 7 is a schematic top view of a diffuser plate according to another embodiment of the utility model, Figure 8 It is a schematic front view of a diffuser plate according to another embodiment of the utility model.

[0057] like Figures 6 to 8 As shown, in another embodiment, the backlight module 100 further includes a diffusion plate 50, which is located on the top of the partition plate 10 to make the light distribution uniform. Specifically, the diffusion plate 50 is a light-transmitting polymer material, and the top of the partition plate 10 abuts against the bottom of the diffusion plate 50, so that the light of the lamp bead 30 is reflected to the top of the light splitting groove 11 of the partition plate 10, and then forms a light with uniform brightness through the light splitting area 43 of the light splitting plate 40, so that the optical diffusion rate reaches 50%, thereby enhancing the effect of the light module.

[0058] Fig. 9 It is a schematic structural diagram according to an embodiment of the utility model.

[0059] like Fig. 9 As shown, in this embodiment, the number of the light splitting grooves 11 is multiple and distributed in a rectangular array. Specifically, the partition plate 10 includes multiple light splitting grooves 11, and the number of the lamp beads 30 is multiple, and each lamp bead 30 is arranged corresponding to a light splitting groove 11 of the partition plate 10, so that the light of each lamp bead 30 has a corresponding light splitting groove 11 to effectively converge its halo energy and reduce halo interference. Here, the area of ​​the partition plate 10 is the same as the area of ​​the light splitting plate 40. In other embodiments, the area of ​​the light splitting plate 40 is larger than the area of ​​the partition plate 10.

[0060] In this embodiment, the partition plate 10 is formed with a plurality of light splitting grooves 11 in a hollow inverted quadrangular pyramid structure, each light splitting groove 11 corresponds to a lamp bead 30, and each partition plate 10 corresponds to a light splitting plate 40, that is, the plurality of lamp beads 30, the plurality of light splitting grooves 11 and the light splitting plate 40 are arranged correspondingly, so that the backlight module 100 realizes light modularization, which is convenient for the block control of the light of the backlight module 100, thereby realizing full zoning control and utilization of the light source.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A backlight module, characterized in that: include: A partition plate is formed with a light splitting groove in the shape of a hollow inverted quadrangular pyramid, an opening is provided at the bottom of the light splitting groove, and the bottom surface of the partition plate is attached to the circuit board; A lamp bead, the top of which passes through the opening and is exposed in the middle of the light splitting groove, and is arranged one-to-one with the light splitting groove, the lamp bead comprises at least one reflecting groove and at least one illuminant, the illuminant is arranged at the bottom of the reflecting groove, so that the light of the illuminant is diffused to the surroundings through the reflecting groove to the partition plate; The circuit board is arranged on the bottom surface of the partition board and is connected to the lamp beads.

2. The backlight module according to claim 1, characterized in that: The lamp bead also includes: A reflector having an L-shaped structure, the reflector comprising a horizontal wall and a vertical wall, and the light emitter is located on the horizontal wall; The light-transmitting member is arranged in the vertical direction and abuts against the edge of the transverse wall. The light-transmitting member and the reflective member are arranged to form the reflective groove.

3. The backlight module according to claim 2, characterized in that: The number of the reflective grooves is two, each of which has a light-emitting body therein, and the two reflective grooves are symmetrically arranged.

4. The backlight module according to claim 3, characterized in that: The reflective groove of the lamp bead is filled with a filler, and the surface of the filler is coated with diffusion powder.

5. The backlight module according to claim 4, characterized in that: The partition plate structure is formed by cutting and splicing.

6. The backlight module according to any one of claims 1 to 5, characterized in that: Also includes: The spectrometer comprises a base plate and a plurality of spectrometer blocks in a triangular pyramid structure. The bottom of the base plate abuts against the top of the partition plate. The plurality of spectrometer blocks are arranged on the top of the base plate, and a spectrometer area is formed between two adjacent spectrometer blocks to effectively distribute the distribution area of ​​the light.

7. The backlight module according to claim 6, characterized in that: The orthographic projection of the light splitting block on the bottom plate is a non-equilateral triangle.

8. The backlight module according to claim 7, characterized in that: The included angle between two adjacent light splitting blocks of the light splitting plate is any value in the range of 10°-180°.

9. The backlight module according to claim 1, characterized in that: Also includes: The diffusion plate is located on the top of the partition plate to make the light distribution uniform.

10. The backlight module according to claim 9, characterized in that: The partition plate structures are multiple in number and distributed in a rectangular array.

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