Lamp panel assembly, backlight module and display device

Abstract

The utility model relates to the technical field of display, and discloses a lamp panel assembly, a backlight module and a display device. The lamp panel assembly comprises a lamp panel body and a light source, the lamp panel body comprises a plurality of light shields arranged in an array mode, the first ends of every two adjacent light shields are connected and connected to the inner bottom wall of the containing space, and a light source hole is formed in the second end of each light shield. The side wall of the light shield gradually inclines in the direction away from the light source hole from the second end to the first end. And a light source is arranged on the inner wall of each light shield. In the lamp panel assembly, the light rays emitted by the light sources can be reflected by the inner wall of the light shield and then are emitted from the light source holes, the light shield can effectively avoid the phenomenon of mutual crosstalk of the light rays among the light sources, and therefore the halo effect of the display device is avoided, the display effect of the display device is improved, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a lamp board assembly, a backlight module and a display device. Background Art

[0002] Liquid Crystal Display (LCD) has many advantages such as being thin, light, energy-saving and radiation-free, and is widely used in electronic devices such as high-definition digital TVs, desktop computers, personal digital assistants (PDAs), laptop computers, mobile phones, digital cameras, etc. Most of the liquid crystal display devices in the prior art are backlight type liquid crystal display devices, which include a liquid crystal panel and a backlight module. The backlight module is used to provide a backlight source for the liquid crystal panel so that the liquid crystal panel can display images.

[0003] In order to improve the display effect of the display device, in the related art, the lamp board assembly of some backlight modules adopts a MiniLED backlight source, and the Mini LED backlight source has the effects of higher brightness, better luminous efficiency and lower power consumption. Figure 1 It is a schematic structural diagram of a backlight module provided by the prior art. As Figure 1 shown, the lamp board assembly 100' in the related art usually includes a PCB board 110' and a plurality of Mini LEDs 120' arranged in an array on the PCB board 110'. Since the Mini LEDs 120' emit surface light sources and have a large emission angle, the light emitted by the plurality of Mini LEDs 120' is subject to mutual crosstalk, which in turn causes a halo effect in the display device, seriously affecting the image quality display effect of the display device.

[0004] Therefore, it is urgent to propose a lamp board assembly to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a lamp board assembly, a backlight module and a display device, which can effectively improve the mutual crosstalk of the light emitted by multiple backlight sources, avoid the halo effect in the display device, and thus improve the display effect of the display device.

[0006] Based on the above concept, the technical solution adopted by the utility model is as follows:

[0007] A lamp board assembly, comprising:

[0008] A lamp board body, including a plurality of light-shielding covers arranged in an array, the first ends of two adjacent light-shielding covers are connected, and a light source hole is opened at the second end of each light-shielding cover. The side wall of the light-shielding cover gradually inclines away from the light source hole in the direction from the second end to the first end;

[0009] A light source, and the light source is provided on the inner wall of each of the light-shielding covers.

[0010] As a preferred solution of the lamp board assembly provided by the present utility model, the light source hole is a polygonal hole, and the light-shielding cover is a frustum-shaped structure.

[0011] As a preferred solution of the lamp board assembly provided by the present utility model, the light source hole is a circular hole, and the light-shielding cover is a truncated cone-shaped structure.

[0012] As a preferred solution of the lamp board assembly provided by the present utility model, at least two of the light sources are arranged at intervals along the circumferential direction of the light source hole in each of the light-shielding covers.

[0013] As a preferred solution of the lamp board assembly provided by the present utility model, the lamp board body further includes a border part, and the border part is arranged around the outer periphery of all the light-shielding covers.

[0014] As a preferred solution of the lamp board assembly provided by the present utility model, the lamp board body further includes a connecting part, and adjacent two of the light-shielding covers are connected through the connecting part.

[0015] As a preferred solution of the lamp board assembly provided by the present utility model, the lamp board body is an integral structure.

[0016] As a preferred solution of the lamp board assembly provided by the present utility model, a first reflection layer is provided on the inner wall of the light-shielding cover.

[0017] The present utility model further provides a backlight module, which includes a back plate and the lamp board assembly as described above. A receiving space is formed on the back plate, and the lamp board assembly is arranged in the receiving space.

[0018] The present utility model further provides a display device, which includes a liquid crystal panel and the backlight module as described above, and the liquid crystal panel is arranged on the backlight module.

[0019] The beneficial effects of the present utility model are:

[0020] The present utility model provides a lamp board assembly, which includes a lamp board body and light sources. The lamp board body includes a plurality of light-shielding covers arranged in an array. The first ends of two adjacent light-shielding covers are connected and both are connected to the inner bottom wall of the accommodating space. Moreover, a light source hole is formed at the second end of each light-shielding cover, and the side wall of the light-shielding cover is inclined gradually away from the light source hole in the direction from the second end to the first end; a light source is arranged on the inner wall of each light-shielding cover. With the above arrangement, the light emitted by the light sources can be emitted from the light source holes after being reflected by the inner walls of the light-shielding covers. The light-shielding covers can effectively avoid the phenomenon of light crosstalk between multiple light sources, thereby avoiding the halo effect in the display device, and further improving the display effect of the display device and enhancing the user experience; in addition, the structure of this lamp board assembly is simple, the manufacturing cost is relatively low, and it is also convenient to improve and process on the original backlight module, which can effectively reduce the improvement cost.

[0021] The present utility model provides a backlight module. By applying the above lamp board assembly, the phenomenon of light crosstalk between multiple light sources can be effectively avoided, and the display effect of the display device can be improved.

[0022] The present utility model also provides a display device. By applying the above backlight module, the display effect can be effectively improved, and the user experience can be enhanced. Description of the Drawings

[0023] Figure 1 is a schematic cross-sectional structure view of a backlight module provided by the prior art;

[0024] Figure 2 is a schematic cross-sectional structure view of a backlight module provided in Embodiment 1 of the present utility model;

[0025] Figure 3 is Figure 2 a partial enlarged view at A;

[0026] Figure 4 is a partial top view structure view of a lamp board assembly provided in Embodiment 1 of the present utility model;

[0027] Figure 5 is a partial structure view of a lamp board body before molding provided in Embodiment 1 of the present utility model;

[0028] Figure 6 is a partial top view structure view of a lamp board assembly provided in Embodiment 2 of the present utility model;

[0029] Figure 7 is a schematic cross-sectional structure view of a backlight module provided in Embodiment 3 of the present utility model;

[0030] Figure 8 is Figure 7 a partial enlarged view at B;

[0031] Figure 9 This is a partial top view structural schematic diagram of the lamp board assembly provided in Embodiment 3 of the present utility model.

[0032] In the figure:

[0033] 100', lamp board assembly; 110', PCB board; 120', Mini LED;

[0034] 100, lamp board assembly; 110, lamp board body; 111, light shielding cover; 1111, light source hole; 112, connecting part; 113, frame part; 120, light source;

[0035] 200, back plate; 201, accommodating space;

[0036] 300, PCB board; 301, through hole. Detailed implementation manners

[0037] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0038] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Embodiment 1

[0042] Figure 2 FIG. 4 shows a schematic diagram of the structure of the backlight module provided in this embodiment. Figure 3 Shows Figure 2 A local enlarged view of point A. Figure 4 FIG. 1 shows a partial structural diagram of the light board assembly 100 provided in this embodiment. Figures 2 - 4 As shown, this embodiment provides a backlight module, which includes a back plate 200 and a light board assembly 100 . An accommodating space 201 is formed on the back plate 200 , and the light board assembly 100 is disposed in the accommodating space 201 .

[0043] In this embodiment, the light board assembly 100 includes a light board body 110 and a light source 120. The light board body 110 includes a plurality of light shields 111 arranged in an array. The first ends of two adjacent light shields 111 are connected and connected to the inner bottom wall of the accommodating space 201. The second end of each light shield 111 is provided with a light source hole 1111. The side wall of the light shield 111 gradually tilts away from the light source hole 1111 along the direction from the second end to the first end. The inner wall of each light shield 111 is provided with a light source 120. With the above arrangement, the light emitted by the light source 120 can be reflected by the inner wall of the light shield 111 and then emitted from the light source hole 1111 ( Figure 3 The direction of the middle arrow is the emission path of the light emitted by the light source 120), and the sunshade 111 can effectively avoid the phenomenon of light crosstalk between multiple light sources 120, thereby avoiding the halo effect of the display device, thereby improving the display effect of the display device and enhancing the user's experience; in addition, the lamp panel assembly 100 has a simple structure and a low manufacturing cost, and is also easy to improve and process on the original backlight module, which can effectively reduce the improvement cost.

[0044] It should be noted that the inner side of the light shield 111 refers to the side of the light shield 111 facing the inner bottom wall of the accommodating space 201, and the outer side of the light shield 111 refers to the side of the light shield 111 away from the inner bottom wall of the accommodating space 201. In this embodiment, the light board body 110 is adhered to the back plate 200, with a simple structure and a stable connection.

[0045] Optionally, the light source 120 is an LED lamp, which has the advantages of small volume, light weight, high efficiency, long service life, environmental protection and durability. In this embodiment, the light source 120 is preferably a Mini LED lamp.

[0046] Optionally, to reduce light energy loss, a first reflective layer is provided on the inner wall of the hood of the light shield 111, so that after the light emitted by the light source 120 hits the inner wall of the hood, as much light as possible can be reflected and emitted from the light source hole 1111, so as to prevent light from directly emitting from the side wall of the light shield 111 and affecting the display effect of the display device. Optionally, the first reflective layer can be a metal coating, such as a metal material layer with low emissivity like gold foil or aluminum foil.

[0047] A second reflective layer is provided on the inner bottom wall of the accommodating space 201. A part of the light emitted by the light source 120 will hit the inner bottom wall of the accommodating space 201, and the second reflective layer can reflect this part of the light to the inner wall of the hood of the light shield 111, and then be emitted through the first reflective layer on the inner wall of the hood of the light shield 111, and finally emitted from the light source hole 1111, further improving the light energy utilization rate of the light source 120. Optionally, the second reflective layer can be a metal coating, such as a metal material layer with low emissivity like gold foil or aluminum foil. It can be understood that since the backplane 200 is made of aluminum, the inner bottom wall of the accommodating space 201 of the backplane 200 can be used as a reflective layer without additionally providing a second reflective layer.

[0048] As Figure 4 shown, at least two light sources 120 are arranged at intervals along the circumference of the light source hole 1111 in each light shield 111, so as to increase the light output of the entire lamp board assembly 100, and thus ensure the display brightness and display effect of the display device.

[0049] Optionally, the light source hole 1111 is a polygonal hole, and the light shield 111 is a frustum-shaped structure. In this embodiment, the light source hole 1111 is a square hole, and the light shield 111 is a quadrangular frustum. This setting can form four side surfaces around the light source hole 1111, and one light source 120 is arranged on each side surface. By adopting this setting method, on the one hand, the four side surfaces can play a role in positioning the corresponding light source 120, facilitating the installation of the light source 120 on the inner wall of the light shield 111 and improving the assembly efficiency between the light source 120 and the light shield 111; on the other hand, it can also improve the light output uniformity at each light source hole 1111 while ensuring the light output. Of course, in other embodiments, at least two light sources 120 can also be arranged on each side surface of a single light shield 111, and this embodiment does not limit this.

[0050] It can be understood that in other embodiments, the shape of the light source hole 1111 can also be triangular, pentagonal, hexagonal, etc., which is not limited in this embodiment; and the number and arrangement of the light sources 120 provided on each side of a single light-shielding cover 111 are not limited in this embodiment, and designers can adjust the number and arrangement of the light sources 120 provided on the single light-shielding cover 111 according to actual needs.

[0051] It should be specifically noted that the angle between the side wall of the light-shielding cover 111 and the inner bottom wall of the accommodating space 201 is not limited in this embodiment, as long as it is ensured that at least part of the light emitted by the light source 120 can be emitted from the light source hole 1111 after being reflected on the inner side wall of the light-shielding cover 111.

[0052] Optionally, the lamp board body 110 is an integral structure. This design can, on the one hand, omit the assembly link of multiple light-shielding covers 111 and improve the processing efficiency; on the other hand, since the lamp board body 110 is an integral whole, it can avoid the situation where the positions of multiple separate light-shielding covers 111 shift during installation, thereby ensuring the assembly accuracy between the lamp board body 110 and the backplane 200.

[0053] Figure 5 The partial structural schematic diagram of the lamp board body 110 provided in this embodiment before molding is shown. As Figure 5 and in combination with Figure 4 shown, in this embodiment, the light-shielding cover 111 is formed by a thermoforming process on a PCB board 300 provided with a through hole 301. Specifically, in this embodiment, there are the following two processing methods for the lamp board assembly 100: 1) According to the number and arrangement of the light sources 120 on the lamp board body 110, corresponding circuits are printed on the PCB board 300 with strong plasticity by 3D printing, then the corresponding through holes 301 are punched out on the PCB board 300, and then the light sources 120 are installed at the corresponding positions on the PCB board 300. Finally, the part around the through hole 301 is formed into the light-shielding cover 111 by a thermoforming process. Correspondingly, the through hole 301 forms the light source hole 1111; 2) According to the number and arrangement of the light sources 120 on the lamp board body 110, the corresponding through holes 301 are punched out on the PCB board 300, and then the part around the through hole 301 is formed into the light-shielding cover 111 by a thermoforming process. Correspondingly, the through hole 301 forms the light source hole 1111, and finally the light sources 120 are installed at the corresponding positions of the light-shielding cover 111. In the first processing method, since temperature changes may occur during the thermoforming process, it may cause the positions of the light sources 120 on the formed light-shielding cover 111 to change. Therefore, compared with the first processing method, the second processing method can ensure the accuracy of the installation positions of the light sources 120.

[0054] Continuing as Figure 4As shown, in this embodiment, two adjacent light shields 111 are directly connected. This design can improve the utilization rate of the lamp board body 110, reduce the distance between the light sources 120 arranged on two adjacent light shields 111, and improve the display effect of the display device.

[0055] Embodiment Two

[0056] This embodiment provides a backlight module. The specific structure of this backlight module is substantially the same as that of the backlight module in Embodiment One, except that: the shape of the light source holes 1111 is different from the shape of the light shields 111.

[0057] Figure 6 The partial structural schematic diagram of the lamp board assembly 100 provided in this embodiment is shown, as Figure 6 and in combination with Figure 2 As shown, in this embodiment, the light source holes 1111 are circular holes, and the light shields 111 are frustum-shaped structures, with simple structures and convenient for processing. In this embodiment, the number of light sources 120 arranged on each light shield 111 is four, and the four light sources 120 are evenly spaced along the circumference of the light source holes 1111 to ensure the light output and light output uniformity at each light source hole 1111. Of course, in other embodiments, the number of light sources 120 arranged on each light shield 111 can also be one, two, three, five, six, or even more. This embodiment does not limit the number and arrangement mode of the light sources 120 arranged on each light shield 111. Designers can adjust the number and arrangement mode of the light sources 120 arranged on each light shield 111 according to actual needs, and the number and arrangement mode of the light sources 120 arranged on multiple light shields 111 can be the same or different.

[0058] Embodiment Three

[0059] This embodiment provides a backlight module. The specific structure of this backlight module is substantially the same as that of the backlight module in Embodiment One, except that: the structure of the lamp board body 110 is different.

[0060] Figure 7 The structural schematic diagram of the backlight module provided in this embodiment is shown, Figure 8 which shows Figure 7 the partial enlarged view at B, Figure 9 The partial structural schematic diagram of the lamp board assembly 100 provided in this embodiment is shown, as Figures 7 - 9As shown, in this embodiment, the lamp board body 110 further includes a frame portion 113, and the frame portion 113 is disposed around the outer periphery of all the light-shielding covers 111. By providing the frame portion 113, on the one hand, when the lamp board body 110 is connected to the back plate 200, the frame portion 113 can be connected to the back plate 200, which can increase the contact area between the lamp board body 110 and the back plate 200 and improve the connection effect; on the other hand, it can also avoid the side edges of the light-shielding covers 111 at the edges from being deformed during the thermoforming process, thereby ensuring the structural stability of the entire lamp board body 110.

[0061] Optionally, the lamp board body 110 further includes a connecting portion 112, and adjacent two light-shielding covers 111 are connected to each other through the connecting portion 112. By providing the connecting portion 112, the contact area between the lamp board body 110 and the back plate 200 can be further increased, and the connection effect can be improved.

[0062] In this embodiment, the light-shielding cover 111, the connecting portion 112, and the frame portion 113 are of an integral structure. This design, on the one hand, can omit the assembly link of the above components and improve the processing efficiency; on the other hand, the lamp board body 110 is a whole, which can avoid the situation that the positions of multiple separate light-shielding covers 111 shift during installation, thereby ensuring the assembly accuracy between the lamp board body 110 and the back plate 200.

[0063] Embodiment Four

[0064] The present invention provides a display device, which includes a liquid crystal panel and a backlight module. The liquid crystal panel is disposed on the backlight module, and the backlight module is used to provide a backlight source for the liquid crystal panel so that the liquid crystal panel can display an image. In this embodiment, the backlight module can adopt any one of the backlight modules in Embodiment One, Embodiment Two, or Embodiment Three, which can effectively improve the phenomenon that the light rays emitted by multiple light sources 120 interfere with each other, avoid the halo effect of the display device, and thus improve the display effect of the display device.

[0065] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed.

Claims

1. A light panel assembly, characterized in that: include: A light panel body (110) comprises a plurality of light shields (111) arranged in an array, wherein the first ends of two adjacent light shields (111) are connected, and a light source hole (1111) is provided at the second end of each light shield (111), and the side wall of the light shield (111) is gradually inclined in a direction away from the light source hole (1111) along a direction from the second end to the first end; A light source (120), wherein the inner wall of each light shield (111) is provided with the light source (120).

2. The light panel assembly according to claim 1, characterized in that: The light source hole (1111) is a polygonal hole, and the light shield (111) is a prism-shaped structure.

3. The light panel assembly according to claim 1, characterized in that: The light source hole (1111) is a circular hole, and the light shield (111) is a truncated cone structure.

4. The light panel assembly according to claim 1, characterized in that: At least two light sources (120) are arranged in each light shield (111) and are spaced apart from each other along the circumference of the light source hole (1111).

5. The light panel assembly according to claim 1, characterized in that: The lamp panel body (110) further comprises a frame portion (113), and the frame portion (113) is arranged around the outer circumference of all the light shields (111).

6. The light panel assembly according to claim 1, characterized in that: The lamp panel body (110) further comprises a connecting portion (112), and two adjacent light shields (111) are connected via the connecting portion (112).

7. The light panel assembly according to any one of claims 1 to 6, characterized in that: The lamp panel body (110) is an integrated structure.

8. The light panel assembly according to any one of claims 1 to 6, characterized in that: The inner wall of the light shielding cover (111) is provided with a first reflective layer.

9. A backlight module, characterized in that: It comprises a back plate (200) and a light board assembly according to any one of claims 1 to 8, wherein a receiving space (201) is formed on the back plate (200), and the light board assembly is arranged in the receiving space (201).

10. A display device, characterized in that: It comprises a liquid crystal panel and the backlight module as claimed in claim 9, wherein the liquid crystal panel is arranged on the backlight module.

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