CN217766892U

CN217766892U - Backlight module and display device

Info

Publication number: CN217766892U
Application number: CN202221142413.XU
Authority: CN
Inventors: 刘欣; 王小培
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-11-08
Anticipated expiration: 2032-05-13

Abstract

The utility model provides a backlight module and display device, backlight unit include backplate and diffusion piece, and the chamber is held in formation between backplate and the diffusion piece, holds the intracavity and is provided with circuit board and LED lamp, and the LED lamp includes lamp strip and interval and sets up lamp pearl and socket on the lamp strip, and the lamp strip sets up in one side of circuit board towards the diffusion piece, and the lamp pearl upper shield is equipped with lens, and the socket includes transparent base member, is formed with microporous structure in the transparent base member. Light incident on the socket enters the base body through the transparent base body, is scattered out towards the diffusion sheet after being reflected by the microporous structure, can play a role in compensating light energy, and avoids the shadow problem. Adopt this practical technical scheme, the interval of socket and lens is unrestricted, can reduce the length of LED lamp strip and circuit board with the socket design in the position nearer apart from lens, and this backlight unit has the advantage that can reduce the cost of manufacture and reduce backlight unit's volume.

Description

Backlight module and display device

Technical Field

The utility model relates to a display device technical field especially relates to a backlight module and display device.

Background

In the direct type backlight module, an LED lamp and a reflective lens are generally used as light sources, so that the optical path can be increased by changing phases, that is, the light energy of the LED lamp is secondarily distributed by the reflective lens, is firstly refracted downwards to a reflector plate, and is then reflected to a diffusion plate by the reflector plate to form a uniform surface light source. One or more connecting sockets are arranged on the existing LED light bar, the surface reflectivity of the connecting sockets is low, the connecting sockets are yellow and black in color after reflow soldering, and the problem of shadows can occur in the corresponding display picture area; in the prior art, for solving the shadow problem, can design the great interval with socket and lens to avoid influencing the main light energy interval of reflector plate receiving lens side outgoing, nevertheless can increase the length of LED lamp strip and circuit board like this, increased backlight unit's volume, increase extra cost moreover.

Therefore, a novel backlight module and a display device are needed to solve or at least alleviate the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a backlight module and display device aims at solving the technical problem that backlight module is bulky among the prior art, with high costs.

In order to realize the above purpose, according to the utility model discloses an aspect, the utility model provides a backlight module, including backplate and diffusion piece, the backplate with it holds the chamber to form between the diffusion piece, it is provided with circuit board and LED lamp to hold the intracavity, the LED lamp include lamp strip and interval set up in lamp pearl and socket on the lamp strip, the lamp strip set up in the circuit board towards one side of diffusion piece, lamp pearl upper shield is equipped with lens, the socket includes transparent base member, be formed with microporous structure in the transparent base member.

In one embodiment, the microporous structure includes a plurality of microporous layers stacked one on another, and each of the microporous layers includes a plurality of micropores spaced apart from each other.

In one embodiment, the micropores in two adjacent microporous layers are arranged in a staggered manner.

In one embodiment, the micro-hole comprises a top part and a bottom part opposite to the top part, the top part is the side of the base body far away from the circuit board, and round corners are formed at two ends of the top part.

In one embodiment, the micro holes are elliptical holes, and the long axis direction of the elliptical holes is consistent with the length direction of the light bar.

In one embodiment, a through hole is formed in the substrate, and a reflection plate is arranged on the inner wall of the through hole.

In one embodiment, the material of the transparent matrix comprises at least one of polymethyl methacrylate and polystyrene.

In an embodiment, the number of the lamp beads and the socket is multiple, and each lamp bead is provided with the lens.

In an embodiment, a reflector plate is further disposed in the accommodating cavity, the reflector plate is partially mounted on the circuit board, a first mounting hole and a second mounting hole are formed in the reflector plate, the socket is mounted in the first mounting hole, and the lamp bead and the lens are mounted in the second mounting hole.

According to the utility model discloses an on the other hand, the utility model discloses still provide a display device, display device includes display panel and the aforesaid backlight unit, display panel install in backlight unit.

In the above scheme, backlight unit includes backplate and diffusion piece, forms between backplate and the diffusion piece and holds the chamber, holds the intracavity and is provided with circuit board and LED lamp, and the LED lamp includes lamp strip and interval and sets up lamp pearl and the socket on the lamp strip, and the lamp strip sets up in the one side of circuit board towards the diffusion piece, and the lamp pearl upper shield is equipped with lens, and the socket includes transparent base member, is formed with microporous structure in the transparent base member. Lens can be reflective lens, and the socket includes transparent base member, and the light of following LED lamp pearl transmission is through the lens secondary distribution back, and partial light direct incidence is to the diffusion piece, and partial incidence is to the reflector plate on, and the light that partial light incided on the socket is inside transparent base member entering base member, and the diffusion piece scattering is gone out towards after the cellular structure reflection, can play the utility of effective compensation light energy, avoids appearing the shadow problem. Adopt the technical scheme of the utility model, the interval of socket and lens is unrestricted, can design the socket in the nearer position apart from lens, and this utility model has the length that can reduce LED lamp strip and circuit board, and then reduces the cost of manufacture and the advantage that reduces backlight unit's volume.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a partial structure of a backlight module and a display panel in the prior art;

fig. 2 is a schematic view of a part of the structure of the backlight module and the display panel according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a socket according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a light path of light incident on the microporous structure according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an LED lamp and a lens according to an embodiment of the present invention.

The reference numbers illustrate:

1. a back plate; 2. a diffusion sheet; 3. an LED lamp; 31. a light bar; 32. a lamp bead; 33. a socket; 331. a base; 332. a microporous structure; 333. micropores; 334. a through hole; 4. a circuit board; 5. a lens; 6. a display panel; 7. a reflective sheet; 8. a reflective plate.

The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment mode and referring to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper and lower 8230; etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Moreover, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory or impossible to realize, the combination of the technical solutions should not exist, and the combination is not within the protection scope of the present invention.

Referring to fig. 2-5, according to an aspect of the present invention, the present invention provides a backlight module, including backplate 1 and diffusion piece 2, form between backplate 1 and the diffusion piece 2 and hold the chamber, hold the intracavity and be provided with circuit board 4 and LED lamp 3, LED lamp 3 includes lamp strip 31 and the lamp pearl 32 and the socket 33 that the interval set up on lamp strip 31, lamp strip 31 sets up in the one side that circuit board 4 faces diffusion piece 2, lamp pearl 32 upper shield is equipped with lens 5, socket 33 includes transparent base 331, is formed with microporous structure 332 in the transparent base 331.

Normally, most of the light emitted from the lens 5 is reflected by the reflecting sheet 7 and then emitted toward the diffusion sheet 2 to form system effective light energy, and uniformity of the light energy can be ensured. However, referring to fig. 1, since the sockets 33 are disposed on the LED lamps 3, and the reflective sheet 7 needs to be partially opened with mounting holes for avoiding, the sockets 33 replace the original positions of the partial reflective sheet 7, whereas in the prior art, the sockets 33 have low surface reflectivity and become yellow and black after reflow soldering baking, and the corresponding display areas may form a local shadow phenomenon due to light energy loss, as shown in the area a in fig. 1, which leads to the fact that designers have to increase the distance between the sockets 33 and the lens 5 to reduce the light incident on the sockets 33, but such needs to increase the lengths of the LED lamps 3 and the circuit board 4, which increases the manufacturing cost and also increases the volume of the backlight module.

In the above embodiment, the lens 5 may be a reflective lens, the socket 33 includes the transparent base 331, after the light emitted from the LED lamp 3 beads is secondarily distributed by the lens 5, part of the light directly enters the diffusion sheet 2, and part of the light enters the reflection sheet 7, and part of the light entering the socket 33 enters the base 331 through the transparent base 331, and is reflected by the microporous structure 332 and then scattered out toward the diffusion sheet 2, so that the light can be effectively compensated, and the shadow problem can be avoided, for example, the reflected light also enters the area A1 in fig. 2. Adopt this practical technical scheme, socket 33 and lens 5's interval is unrestricted, can reduce 3 and circuit board 4's of LED lamp length with socket 33 design in the position that is closer apart from lens 5, and this embodiment has the advantage that can reduce the cost of manufacture and reduce backlight unit's volume.

In one embodiment, microporous structure 332 comprises a plurality of microporous layers stacked one on top of the other, each microporous layer comprising a plurality of micropores 333 spaced apart from each other. Specifically, the micro holes 333 may be air holes, that is, the micro holes 333 are filled with air, and the stacking direction of the micro hole layers is the same as the height direction of the socket 33, that is, the direction perpendicular to the light bar 31. Part of the light emitted from the side wall of the lens 5 enters the transparent substrate 331 of the socket 33, and the light can be reflected and refracted at the medium interface of the micro-hole 333 and the substrate 331, and the refracted light can reach the next medium interface, so that the reflection and the refraction are repeated. When the refractive index of the substrate 331 is set to n1 and the refractive index of air is set to n2, light energy is generated at the boundary between the substrate 331 and the micro-holes 333The theoretical reflectivity is: r = (n 1-n 2) ² /(n1+n2) ² If N is the number of microporous layers through which light energy passes, the total reflectance of the microporous structure 332 layer to incident LED light energy is: r =1- (1-R) ^N . It can be seen that the total reflectivity of the microporous structure 332 to incident light energy depends on the refractive index of the substrate 331 and the number of stacked microporous layers in the receptacle 33, and in the case of a certain material of the substrate 331, the number of microporous layers in the medium becomes the only influencing variable, and the larger the number of microporous layers, the larger the reflectivity. Therefore, the arrangement of the micro-porous layers can increase the reflectivity of the socket 33, and play a role in more effectively compensating light energy, thereby further reducing the lengths of the LED lamps 3 and the circuit board 4, and further reducing the manufacturing cost and the volume of the backlight module.

In one embodiment, the pores 333 in two adjacent microporous layers are offset. The micro holes 333 in adjacent layers are arranged in a staggered manner, so that light rays emitted from the space between the micro holes 333 in the upper layer can be incident on the micro holes 333 in the lower layer, and are reflected and refracted on a medium between the micro holes 333 and the base 331, so that the reflectivity of the socket 33 is increased, and the effect of more effectively compensating light energy is achieved.

In one embodiment, the micro-holes 333 include a top portion and a bottom portion disposed opposite to the top portion, the top portion is a side of the substrate 331 away from the circuit board 4, and both ends of the top portion are formed with rounded corners. Specifically, the micro holes 333 are elliptical holes, and the major axis direction of the elliptical holes coincides with the length direction of the light bar 31. The top is towards the one side of incident ray direction, adopts the fillet design in the top left and right sides, is favorable to the receipt and the transition of light.

In one embodiment, a through hole 334 is formed in the base 331, and the reflecting plate 8 is disposed on an inner wall of the through hole 334. The through hole 334 is used for connecting a power supply to a wiring harness, and the reflecting plate 8 is arranged on the inner wall of the through hole 334 and used for reflecting escaping light energy, so that the light energy utilization rate is improved.

In one embodiment, the transparent substrate 331 includes at least one of polymethyl methacrylate and polystyrene as a material of the transparent substrate 331. For example, the material can be a polymethyl methacrylate matrix, a polystyrene matrix, or a combination of a polymethyl methacrylate matrix and a polystyrene matrix. By using the optical grade transparent resin material as the substrate 331, a part of the light energy refracted by the lens 5 can be absorbed more effectively, and the light can be reflected efficiently by the multilayer microstructure inside the substrate. Microporous structure 332 may be formed by a physical or chemical foaming process to form a stack of microporous layers in the region between the receptacles and the outer surface.

In an embodiment, a reflector plate 7 is further disposed in the accommodating cavity, a part of the reflector plate 7 is mounted on the circuit board 4, a first mounting hole and a second mounting hole are formed in the reflector plate 7, the socket 33 is mounted in the first mounting hole, and the lamp bead 32 and the lens 5 are mounted in the second mounting hole. The quantity of lamp pearl 32 and socket 33 all can be a plurality ofly, and a plurality of sockets 33 and lamp pearl 32 set up along the length direction interval of lamp strip 31.

According to the utility model discloses an on the other hand, the utility model discloses still provide a display device, display device includes display panel 6 and foretell backlight unit, and display panel 6 installs in backlight unit, and this display device can be the TV set. Since the display device includes all technical solutions of all embodiments of the backlight module, at least all beneficial effects brought by all technical solutions are achieved, and are not described in detail herein.

The above is only the optional embodiment of the present invention, and therefore the patent scope of the present invention is not limited, all of which are under the technical conception of the present invention, the equivalent structure transformation made by the contents of the specification and the attached drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. The utility model provides a backlight module which characterized in that, includes backplate and diffusion piece, the backplate with form between the diffusion piece and hold the chamber, it is provided with circuit board and LED lamp to hold the intracavity, the LED lamp include the lamp strip and set up at the interval in lamp pearl and socket on the lamp strip, the lamp strip set up in the circuit board towards one side of diffusion piece, lamp pearl upper shield is equipped with lens, the socket includes transparent base member, be formed with microporous structure in the transparent base member.

2. The backlight module as claimed in claim 1, wherein the microporous structure comprises a plurality of microporous layers stacked one on another, each of the microporous layers comprising a plurality of micropores spaced apart from each other.

3. The backlight module according to claim 2, wherein the micro holes in two adjacent micro hole layers are arranged in a staggered manner.

4. The backlight module according to claim 2, wherein the micro via comprises a top portion and a bottom portion opposite to the top portion, the top portion is a side of the substrate away from the circuit board, and two ends of the top portion are formed with rounded corners.

5. The backlight module according to claim 2, wherein the micro-holes are elliptical holes, and a major axis direction of the elliptical holes is identical to a length direction of the light bar.

6. The backlight module according to any one of claims 1-5, wherein a through hole is formed in the base, and a reflective plate is disposed on an inner wall of the through hole.

7. A backlight module according to any one of claims 1-5, characterized in that the material of the transparent substrate comprises one of polymethyl methacrylate or polystyrene.

8. The backlight module according to any one of claims 1-5, wherein the number of the lamp beads and the sockets is plural, and the lens is disposed on each of the lamp beads.

9. The backlight module according to any one of claims 1-5, wherein a reflector plate is further disposed in the receiving cavity, the reflector plate is partially mounted on the circuit board, a first mounting hole and a second mounting hole are formed on the reflector plate, the socket is mounted in the first mounting hole, and the lamp bead and the lens are mounted in the second mounting hole.

10. A display device, comprising a display panel and the backlight module as claimed in any one of claims 1 to 9, wherein the display panel is mounted on the backlight module.