Light bar structure, backlight module and display device

Abstract

The utility model discloses a light bar structure, backlight module and display device, relates to backlight module technical field, wherein light bar structure includes circuit board and light diffusion structure, the circuit board is equipped with lamp bead, light diffusion structure includes a plurality of lens part that is equipped on the circuit board and is corresponding lamp bead, the plurality of lens part is arranged in stack, the plurality of lens part is equipped with a plurality of lens parts, and the plurality of lens parts are equipped with a plurality of lens parts. The adjacent lens parts are arranged at intervals to form a light expansion cavity, by arranging the lens parts, the light emitting angle of the lamp bead is expanded, light emitted by the lamp bead is diffused more uniformly, meanwhile, the adjacent lens parts are arranged at intervals to form the light expansion cavity, and the light can be refracted when passing through the light expansion cavity; according to the light bar structure, the light diffusion structure has a larger light emitting angle, the size of the light diffusion structure can be reduced on the premise that the light diffusion range is met, the cost of the light bar structure can be effectively reduced, and therefore the problem that the cost is high due to the fact that an existing backlight module adopts a large-size lens is solved.

Description

Technical Field

[0001] This utility model relates to the field of backlight module technology, and in particular to a light strip structure, a backlight module, and a display device. Background Technology

[0002] With the development of backlight display technology and the cost advantage of direct-lit backlight display technology, the market share of direct-lit backlight is increasing. Currently, in order to reduce costs, backlight modules mostly adopt a fewer lamp strip scheme, which makes the distance between adjacent lamp strips larger and the emission angle of the lens also need to be increased. Therefore, existing backlight modules usually use a large-size lens scheme to increase the emission angle by increasing the size of the lens. However, the larger the lens size, the higher the cost, resulting in a higher cost for the backlight module. Utility Model Content

[0003] The main purpose of this utility model is to propose a light strip structure, a backlight module, and a display device, which aims to solve the problem that existing backlight modules use large-size lenses, resulting in high costs.

[0004] To achieve the above objectives, the present invention proposes a light strip structure comprising:

[0005] A circuit board, on which LED beads are provided;

[0006] The light-expanding structure includes a plurality of lens portions disposed on the circuit board and corresponding to the lamp beads. The plurality of lens portions are stacked and adjacent lens portions are spaced apart to form a light-expanding cavity, so that light can be diffused. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0008] Figure 1 A schematic diagram of the structure of an embodiment of the backlight module provided by this utility model;

[0009] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0010] Explanation of icon numbers:

[0011] 1000, Backlight Module;

[0012] 100. Lamp strip structure; 1. Circuit board; 11. Lamp bead; 2. Light amplification structure; 21. Lens section; 21a. First lens section; 21b. Second lens section; 22. Light amplification cavity; 3. Support structure; 31. Support section;

[0013] 200, backplate; 300, reflector; 400, diffuser.

[0014] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0015] 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 scope of protection of the present utility model.

[0016] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0017] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0018] With the development of backlight display technology and the cost advantage of direct-lit backlight display technology, the market share of direct-lit backlight is increasing. Currently, in order to reduce costs, backlight modules mostly adopt a fewer lamp strip scheme, which makes the distance between adjacent lamp strips larger and the emission angle of the lens also need to be increased. Therefore, existing backlight modules usually use a large-size lens scheme to increase the emission angle by increasing the size of the lens. However, the larger the lens size, the higher the cost, resulting in a higher cost for the backlight module.

[0019] Based on this, this utility model proposes a light strip structure for a backlight module, aiming to solve the problem of high cost caused by the use of large-size lenses in existing backlight modules. Among other things, Figure 1 and Figure 2 This is a schematic diagram of the backlight module provided by this utility model.

[0020] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the light strip structure 100 includes a circuit board 1 and a light-expanding structure 2. The circuit board 1 is provided with a light bead 11. The light-expanding structure 2 includes a plurality of lens portions 21 disposed on the circuit board 1 and corresponding to the light bead 11. The plurality of lens portions 21 are stacked and adjacent lens portions 21 are spaced apart to form a light-expanding cavity 22, so that light can be diffused.

[0021] In the technical solution of this utility model, by setting the circuit board 1, the lamp beads 11 and the light-expanding structure 2 are arranged. By setting the lamp beads 11, a stable backlight is provided. By setting the lens part 21, the light emission angle of the lamp beads 11 is expanded, so that the light emitted by the lamp beads 11 is diffused more evenly. At the same time, the adjacent lens parts 21 are arranged at intervals to form the light-expanding cavity 22, so that the light can be refracted when passing through the light-expanding cavity 22, so that the light-expanding structure 2 has a larger light emission angle. This allows the light-expanding structure 2 to reduce its size while meeting the light-expanding range, effectively reducing the cost of the lamp strip structure 100. This solves the problem of high cost caused by the use of large-size lenses in the existing backlight module 1000.

[0022] Furthermore, the number of lens portions 21 can be two, three, four, or five, etc., and this utility model does not limit this. Although the more lens portions 21 there are, the larger the light-expanding range of the light-expanding structure 2, the larger the size of the light-expanding structure 2 and the higher the cost. Therefore, in this embodiment, two lens portions 21 are provided to reduce the number of light-transmitting portions while ensuring the light-expanding range of the light-expanding structure 2, thereby helping to reduce the cost of the light strip structure 100.

[0023] The structure of the light-amplifying cavity 22 can vary, for example, it can be a closed structure or an open structure, and this utility model does not limit this. However, if an open structure is used, the light-amplifying cavity 22 will be in contact with the external environment. In a humid environment, water droplets are easily attached to the light-amplifying cavity 22, which will affect the display effect of the backlight module 1000. Therefore, in this embodiment, the light-amplifying cavity 22 is sealed. Thus, a closed structure is used to isolate the light-amplifying cavity 22 from the outside, so as to prevent the light-amplifying structure 2 from being affected by the external environment. Furthermore, the light-amplifying cavity 22 is filled with an inert gas. Since inert gases have high chemical stability and hardly react with other materials, they can significantly reduce the risk of oxidation and corrosion. Therefore, by filling with an inert gas, the risk of the light-amplifying structure 2 being oxidized or corroded is reduced, thereby helping to improve the service life of the light strip structure 100. Furthermore, the inert gas can be of various types, such as argon or helium, and this utility model does not limit this. Specifically, in this embodiment, the inert gas includes nitrogen. Since nitrogen is relatively easy to obtain and has a low cost, nitrogen is used to reduce the cost of the light strip structure 100.

[0024] To improve display performance, in one embodiment, at least one of the lens portions 21 is provided with a quantum dot layer. By providing the quantum dot layer, the conversion from blue light to red / green light is completed when light passes through it, forming high-purity primary colors. This significantly improves the color gamut coverage, thereby enhancing the display performance of the backlight module 1000. It is understood that the quantum dot layer can be positioned in various ways, such as between adjacent lens portions 21 or on the light-emitting side of the outermost lens portion 21; this invention does not limit the placement of the quantum dot layer.

[0025] In another embodiment, quantum dots are added to at least one of the lens portions 21. In this way, the quantum dots are integrated into the lens, and the light does not need to pass through a quantum dot film, reducing energy loss during transmission, thereby making the backlight module 1000 have a wider color gamut and more saturated colors.

[0026] It should be noted that the two related technical features mentioned above, "at least one of the lens portions 21 is provided with a quantum dot layer" and "at least one of the lens portions 21 is provided with quantum dots", can be provided selectively or simultaneously, and this utility model does not limit this.

[0027] Please see Figure 2In one embodiment of this utility model, the plurality of lens portions 21 includes a first lens portion 21a located at the innermost side. A support structure 3 is provided between the first lens portion 21a and the circuit board 1 so that the first lens portion 21a is spaced apart from the lamp bead 11. In this way, by setting the support structure 3 so that the light amplification structure 2 and the lamp bead 11 are spaced apart, it is possible to avoid the light from concentrating and forming hot spots due to direct contact between the light amplification structure 2 and the lamp bead 11, resulting in local overbrightness. It is also possible to adjust the incident angle of the light so that the light distribution is more uniform and to avoid uneven brightness patches on the screen.

[0028] It should be noted that the support structure 3 can be installed in various positions. For example, it can be installed on the light-amplifying structure 2 or on the circuit board 1. This utility model does not limit the location of the support structure 3.

[0029] Furthermore, the support structure 3 includes a plurality of support portions 31, which are spaced apart circumferentially along the lamp beads 11. Thus, by providing the support portions 31, the light-expanding structure 2 can be supported, allowing it to be spaced apart from the lamp beads 11, while also allowing gas flow to promptly remove heat from the lamp beads 11, thereby improving the heat dissipation effect of the lamp strip structure 100. It is understood that the support structure 3 can be varied; in other embodiments, the support structure 3 can also be a ring-shaped support rib, etc., as long as it can space the light-expanding structure 2 from the lamp beads 11. This invention does not limit this specific design.

[0030] In one embodiment of this utility model, please refer to Figure 2 The plurality of lens portions 21 includes an outermost second lens portion 21b, the middle of which is arranged in a flat arc. Thus, the middle of the light-emitting side of the light-amplifying structure 2 is arranged in a flat arc, making the middle of the second lens portion 21b approximately planar. This allows for the uniform dispersion of strong light in the central area through adjustment of the refraction angle, avoiding obvious bright spots on the light-emitting surface, and also allows light to enter the light guide plate or diffuser film more smoothly, reducing local brightness unevenness caused by curved surface focusing. It is understood that, please refer to... Figure 2 A flat arc is a special type of arc surface, specifically characterized as a horizontal or nearly horizontal gently curved surface. Therefore, the fact that the middle part of the second lens portion 21b is set as a flat arc means that the middle part of the second lens portion 21b is roughly a horizontal or nearly horizontal gently curved surface.

[0031] The shape of the lens portion 21 can be various, such as semicircular or square. This utility model does not limit this. Specifically, in this embodiment, each lens portion 21 is arranged in an arc shape. The arc shape is used so that the emitted light from each lens portion 21 can change continuously, so that the refraction angle of the light can be adjusted by adjusting the curvature of the lens portion 21.

[0032] In one embodiment of this utility model, the plurality of lens portions 21 include a first lens portion 21a and a second lens portion 21b arranged from the inside out. The refractive index of the first lens portion 21a is greater than that of the second lens portion 21b. Thus, the first lens portion 21a uses a larger refractive index to diffuse the light as much as possible, while the second lens portion 21b uses a smaller refractive index to make the emitted light from the light-expanding structure 2 converge towards the center as much as possible. This can effectively improve the light transmission efficiency of the light-expanding structure 2, thereby helping to improve the display effect of the display device.

[0033] This utility model also proposes a backlight module 1000, which includes a back plate 200 and a light strip structure 100 disposed on the back plate 200. The specific structure of the light strip structure 100 is as described in the above embodiments. Since this backlight module 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0034] In one embodiment of this utility model, please refer to Figure 1 The backlight module 1000 also includes a reflective sheet 300 disposed on the back plate 200. Thus, by setting the reflective sheet 300, the lost light is reflected back into the diffuser plate 400, thereby helping to reduce light energy waste.

[0035] In one embodiment, the backlight module 1000 further includes a diffuser plate 400 disposed on the back plate 200. The diffuser plate 400 and the lamp strip structure 100 are spaced apart in the front-to-back direction. In this way, by setting the diffuser plate 400, the light is diffused as much as possible, so that the light emitted by the lamp bead 11 is converted into a surface light source, thereby enabling the backlight module 1000 to emit light uniformly.

[0036] This utility model also proposes a display device, which includes a backlight module 1000. The specific structure of the backlight module 1000 is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0037] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A light bar structure, characterized by, include: A circuit board, on which LED beads are provided; The light-expanding structure includes a plurality of lens portions disposed on the circuit board and corresponding to the lamp beads. The plurality of lens portions are stacked and adjacent lens portions are spaced apart to form a light-expanding cavity, so that light can be diffused.

2. The lightbar structure of claim 1, wherein, The amplification cavity is enclosed.

3. The lightbar structure of claim 2, wherein, The amplification cavity is filled with inert gas.

4. The lightbar structure of claim 1, wherein, At least one of the lens portions is provided with a quantum dot layer; and / or, At least one of the lens sections contains quantum dots.

5. The lightbar structure of claim 1, wherein, The plurality of lens portions includes a first lens portion located at the innermost side, and a support structure is provided between the first lens portion and the circuit board to space the first lens portion from the lamp beads.

6. The lightbar structure of claim 5, wherein, The support structure includes multiple support parts, which are spaced apart circumferentially along the LED beads.

7. The lightbar structure of claim 1, wherein, Each of the lens portions is arranged in an arc shape.

8. The lightbar structure of claim 1, wherein, The plurality of lens portions includes a second lens portion located on the outermost side, the middle portion of which is arranged in a flat arc shape.

9. A backlight module, characterized in that, It includes a back plate and a light strip structure disposed on the back plate, the light strip structure including the light strip structure as described in any one of claims 1 to 8.

10. A display device, characterized by comprising: Includes the backlight module as described in claim 9.

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