CN114035260A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN114035260A CN114035260A CN202111258869.2A CN202111258869A CN114035260A CN 114035260 A CN114035260 A CN 114035260A CN 202111258869 A CN202111258869 A CN 202111258869A CN 114035260 A CN114035260 A CN 114035260A
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- Prior art keywords
- positioning
- light guide
- backlight module
- light
- guide plate
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The invention discloses a backlight module and display equipment, wherein the backlight module comprises a back plate, a light bar and a light guide plate, the back plate comprises a bottom plate, and a positioning column is convexly arranged on the bottom plate; the light bar is arranged on the bottom plate and is provided with a positioning hole matched with the positioning column; the light guide plate install in the bottom plate, the income plain noodles of light guide plate is towards the light-emitting side of lamp strip, the income plain noodles of light guide plate seted up with the location breach of reference column periphery looks adaptation, the reference column wears to locate in proper order the locating hole with the location breach. The backlight module of the technical scheme of the invention can realize accurate positioning, save labor and improve assembly efficiency.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module and display equipment.
Background
At present, with the continuous development of global economy, notebook computers are gradually popularized. The phenomenon of bad lamp shadow is the most common problem in the liquid crystal display module of the notebook computer, and in order to solve the problem of bad lamp shadow, more dense dot compensation relative to the position of the lamp bead is usually performed at the gap position of the lamp bead corresponding to the light incident side of the light guide plate, so as to ensure uniform brightness. This has had very high requirement just to the assembly precision of lamp strip and light guide plate, if assembly dislocation between them, can lead to the site dislocation on lamp pearl and the light guide plate, when the dislocation surpassed the default more than, can cause obvious lamp shadow bad phenomenon, and current way is to do the marking line on the backplate usually, and the manual work is counterpointed and is assembled, and it is higher to the operating personnel dependence, has very big quality risk.
Disclosure of Invention
The invention mainly aims to provide a backlight module, which aims to ensure the assembly precision, reduce the assembly difficulty of a light guide plate and a light bar and improve the product quality by arranging a positioning structure between the light bar and the light guide plate.
In order to achieve the above object, the backlight module provided by the present invention comprises a back plate, a light bar and a light guide plate;
the back plate comprises a bottom plate, and a positioning column is convexly arranged on the bottom plate; the light bar is arranged on the bottom plate and is provided with a positioning hole matched with the positioning column; the light guide plate install in the bottom plate, the income plain noodles of light guide plate is towards the light-emitting side of lamp strip, the income plain noodles of light guide plate seted up with the location breach of reference column periphery looks adaptation, the reference column wears to locate in proper order the locating hole with the location breach.
In an optional embodiment, the light bar comprises a substrate and a plurality of light beads arranged on the substrate, the light beads are arranged at intervals along the extending direction of the substrate, the substrate is provided with the positioning holes, the light guide plate faces the edge of the bottom plate and abuts against and presses part of the substrate, and the light incident surface of the light guide plate is attached to the light beads.
In an optional embodiment, the number of the positioning columns is two, the two positioning columns are arranged on the bottom plate at intervals along the extending direction of the light bar, the number of the positioning holes is two, and the number of the positioning notches is two.
In an optional embodiment, the positioning columns are cylinders, one of the positioning holes is a circular hole, the positioning notch corresponding to the circular hole is a semicircular notch, the other positioning hole is a long circular hole, the positioning notch corresponding to the long circular hole is a long circular notch, and the length directions of the long circular hole and the long circular notch are consistent with the length direction of the light bar.
In an optional embodiment, the center distance of the long circular holes is F, and the extending length of the light guide plate along the light bar is L, wherein F is 2-4L.
In an optional embodiment, a plurality of first compensation dots are arranged on the surface of the light guide plate facing the bottom plate, and the plurality of first compensation dots are annularly arranged on the periphery of the positioning notch.
In an optional embodiment, a plurality of second compensation dots are arranged on the surface of the light guide plate facing the bottom plate, and the plurality of second compensation dots correspond to gaps between the two lamp beads.
In an optional embodiment, the backlight module further includes an adhesive member, one surface of the adhesive member is fixed to the back plate, at least a portion of the other surface is attached to the surface of the substrate facing the back plate, and an avoiding hole is formed in a position of the adhesive member corresponding to the positioning hole.
In an optional embodiment, the backlight module further includes a reflective member, the reflective member is sandwiched between the light guide plate and the bottom plate, a part of a surface of the adhesive member facing away from the bottom plate is fixed to the substrate, and another part of the surface of the adhesive member is fixed to the reflective member.
The invention further provides a display device which comprises a display panel and the backlight module, wherein the display panel is arranged on the light emitting side of the backlight module.
The backlight module comprises a back plate, a light bar and a light guide plate, wherein the light bar and the light guide plate are arranged on the back plate, one side of the light guide plate is a light incoming surface and faces the light bar, and the light incoming surface is a side-in type backlight module.
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 an exploded view of a backlight module according to an embodiment of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic structural view of a back plate, a light bar and a light guide plate in the backlight module shown in fig. 1;
FIG. 4 is an enlarged view at B in FIG. 3;
FIG. 5 is a front view of the back plate, the light bar and the light guide plate of the backlight module shown in FIG. 1;
FIG. 6 is an enlarged view at C of FIG. 5;
FIG. 7 is an enlarged view taken at D in FIG. 5;
FIG. 8 is a diagram of a display device according to an embodiment of the present invention.
The reference numbers illustrate:
| 100 | |
31 | |
| 10 | |
311 | |
| 11 | |
32 | First |
| 111 | |
40 | |
| 12 | |
41 | Avoiding |
| 20 | |
50 | |
| 21 | |
60 | Optical adjusting and controlling |
| 211 | Locating |
70 | |
| 22 | |
200 | |
| 30 | |
300 | Display device |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a backlight module 100.
Referring to fig. 1 and fig. 2, in an embodiment of the invention, a backlight module 100 includes a back plate 10, a light bar 20 and a light guide plate 30;
the back plate 10 comprises a bottom plate 11, and a positioning column 111 is convexly arranged on the bottom plate 11; the light bar 20 is mounted on the bottom plate 11, and is provided with a positioning hole 211 matched with the positioning column 111; the light guide plate 30 is installed in the bottom plate 11, the light incident surface 31 of the light guide plate 30 faces the light emitting side of the light bar 20, the light incident surface 31 of the light guide plate 30 is provided with a positioning notch 311 matched with the periphery of the positioning column 111, and the positioning column 111 sequentially penetrates through the positioning hole 211 and the positioning notch 311.
In this embodiment, the backlight module 100 is a side-in type backlight module 100, the light bar 20 is a strip-shaped light source, or is a strip-shaped body composed of a plurality of blocks, and is disposed on a side surface of the light guide plate 30, the side surface of the light guide plate 30 is a light incident surface and faces a light emergent surface of the light bar 20, light emitted from the light bar 20 enters the light guide plate 30, and is totally reflected by the light guide plate 30, so that the light is gradually transmitted from one side of the light guide plate 30 to the other side, and is emitted from the upper surface of the light guide plate 30, thereby implementing a surface light source. Here, the light bar 20 and the light guide plate 30 are both attached to the base plate 11, and the base plate 11 has a planar plate shape, and may be generally a rectangular parallelepiped plate shape. The positioning column 111 is arranged on the bottom plate 11 in a protruding mode, the positioning column 111 and the bottom plate 11 can be of an integrated structure, for example, the positioning column 111 can be formed on the bottom plate 11 in a stamping mode, processing is convenient, and the structural strength and stability of the back plate 10 can be effectively improved. The size of the positioning posts 111 can be set according to the size of the back plate 10, and the cross-sectional shape thereof can be circular, square, or polygonal.
Certainly, in order to make the light bar 20 and the light guide plate 30 more stably installed, the back plate 10 further includes a side plate 12, the side plate 12 is disposed on the periphery of the bottom plate 11, the side surfaces of the light bar 20 and the light guide plate 30 can be limited, the light emitting angle and range of the light source can be limited, and a supporting effect can be provided for the display panel 200, so that a certain light emitting distance is reserved between the light source and the display panel 200. The side plate 12 and the bottom plate 11 can be made of plastic or metal, and when the side plate and the bottom plate are made of plastic, the side plate and the bottom plate can be integrally formed by injection molding; when being the metal material, both can bend the shaping after the punching press, so, this backplate 10's structural strength and stability are good, can play better supporting role and guard action.
The lamp strip 20 is as the light source, generally selects the LED lamp, and is with low costs and light-emitting stability. Here, the light bar 20 is provided with a positioning hole 211, that is, a hole is formed in a structure for fixing the LED lamp, and the fixing structure may be a fixing piece, or may be a circuit board, and is not limited herein. The light incident surface 31 of the light guide plate 30 is provided with a positioning notch 311, and the positioning notch 311 may be a hole structure or a groove structure, and is set according to actual conditions, so as to ensure accurate positioning.
The backlight module 100 of the technical scheme of the invention comprises a back plate 10, a light bar 20 and a light guide plate 30 which are arranged on the back plate 10, wherein one side of the light guide plate 30 is a light incoming surface facing the light bar 20, and the light incoming surface is a side-entering backlight module 100, wherein a positioning column 111 for positioning is arranged on the back plate 10, a corresponding positioning hole 211 is arranged on the light bar 20, a positioning notch 311 is arranged on the light incoming surface 31 of the light guide plate 30, and the positioning column 111 sequentially penetrates through the positioning hole 211 and the positioning notch 311 to achieve a one-time positioning effect, so that the relative positions of the light guide plate 30 and the light bar 20 are more accurate, manual alignment is not needed, the assembly difficulty is effectively reduced, the assembly precision is improved, the lamp shadow problem caused by dislocation assembly can be avoided, and the product quality is improved.
Referring to fig. 2 to 4, in an alternative embodiment, the light bar 20 includes a substrate 21 and a plurality of beads 22 disposed on the substrate 21, the beads 22 are arranged at intervals along an extending direction of the substrate 21, the substrate 21 is provided with the positioning holes 211, the edge of the light guide plate 30 facing the bottom plate 11 presses a portion of the substrate 21, and the light incident surface 31 of the light guide plate 30 is attached to the beads 22.
In this embodiment, lamp strip 20 includes base member and a plurality of lamp pearl 22, and lamp pearl 22 is the LED lamp, and basement 21 structure as an organic whole, so can conveniently assemble, when installing a plurality of lamp pearls 22 in basement 21, install whole basement 21 on bottom plate 11 together again, improve packaging efficiency. Here, this basement 21 can be flexible circuit board, when providing fixedly, can also realize the electricity and connect, supplies power for lamp pearl 22, effectively reduces the equipment part. The positioning hole 211 is formed on the substrate 21, and the positioning hole 211 is matched with the positioning post 111 according to the cross-sectional shape of the positioning post.
Simultaneously, in order to realize better light-emitting effect, with the laminating setting of lamp pearl 22 and light guide plate 30, also promptly, the income plain noodles 31 of light guide plate 30 hugs closely the edge of lamp pearl 22, and is optional, sets up lamp pearl 22 and is the cuboid shape to can closely laminate, set up location breach 311 to groove structure, also have the opening towards lamp pearl 22, thereby under the cooperation of lamp pearl 22 with location breach 311, can accurately laminate at the periphery of reference column 111, realize pinpointing.
Referring to fig. 3 and fig. 4, in an alternative embodiment, two positioning columns 111 are provided, two positioning columns 111 are arranged at intervals on the bottom plate 11 along the extending direction of the light bar 20, two positioning holes 211 are correspondingly provided, and two positioning notches 311 are correspondingly provided.
In this embodiment, in order to further improve the positioning accuracy, the positioning columns 111 are provided with two and arranged at intervals in the extending direction of the light bar 20. Correspondingly, the positioning holes 211 and the positioning notches 311 are also arranged in two, so that the positioning holes and the positioning notches 111 are in one-to-one correspondence. Optionally, two positioning columns 111 are respectively arranged at two ends of the light bar 20, so that the light bar 20 and the light guide plate 30 can be effectively prevented from swinging, a more stable positioning effect can be realized, meanwhile, the influence on the light guide plate 30 can be reduced, and the uniformity of light emission is ensured.
Referring to fig. 5 to 7, in an alternative embodiment, the positioning posts 111 are cylinders, one of the positioning holes 211 is a circular hole, the positioning notch 311 corresponding to the circular hole is a semicircular notch, the other positioning hole 211 is an elongated circular hole, the positioning notch 311 corresponding to the elongated circular hole is an elongated circular notch, and the length directions of the elongated circular hole and the elongated circular notch are the same as the length direction of the light bar 20.
In this embodiment, when the positioning column 111 is the cylinder, set up the locating hole 211 of one end into the round hole, set up the locating notch 311 that corresponds with it into semicircle breach, certainly, positioning column 111 is the cylinder to make the round hole of looks adaptation, semicircle breach and the cylindrical positioning column 111 form comparatively accurate location structure, improve positioning accuracy, guarantee the assembled position between lamp strip 20 and the light guide plate 30. Meanwhile, based on the material performance of the light guide plate 30, the positioning hole 211 at the other end is set to be an oblong hole, the corresponding positioning notch 311 is set to be an oblong notch, the positioning column 111 is still a cylinder, and the length directions of the positioning hole 211 and the positioning notch 311 are set to be consistent with the extending direction of the light bar 20, so that when the light guide plate 30 expands or deforms after being heated or absorbing moisture, a certain space can be reserved for the deformation of the light guide plate 30 through the gap between the positioning hole 211 and the positioning column 111 and the gap between the positioning notch 311 and the positioning column 111, and further, the undesirable phenomena of arch and the like can be prevented from occurring, the service performance of the backlight module 100 is improved, and the service life of the backlight module is prolonged.
In addition, can carry out the chamfer setting with the top of reference column 111 to form the cone, and then more convenient when wearing to establish locating hole 211, further improve the packaging efficiency.
In an alternative embodiment, the center distance of the oblong holes is F, and the extension length of the light guide plate 30 along the light bar 20 is L, where F is 2 ‰ L to 4 ‰ L.
In this embodiment, the center distance of the long circular holes is F, and the value of F should not be too large, otherwise, the positioning columns 111 may not have a good positioning effect, and the value of F should not be too small, otherwise, the light guide plate 30 may be deformed and released everywhere. According to actual test, the numerical range of the selected F is related to the length L of the light guide plate 30 in the extending direction of the light bar 20, namely, the selected F is set to be 2-4L, for example, 3L, so that a good positioning effect is guaranteed, meanwhile, a proper space can be reserved for deformation of the light guide plate 30, assembly is facilitated, and the product yield is effectively improved.
Referring to fig. 6 and fig. 7, in an alternative embodiment, a plurality of first compensation dots 32 are disposed on a surface of the light guide plate 30 facing the bottom plate 11, and the plurality of first compensation dots 32 are disposed around a periphery of the positioning notch 311.
In this embodiment, even if the positioning structures are disposed at the two ends of the light bar 20, the light incident surface 31 of the light guide plate 30 is provided with the positioning notch 311, so that a certain amount of light loss is caused when light passes through the positioning notch. Therefore, in order to compensate for the decrease of the light brightness at the positioning structure, the plurality of first compensation dots 32 are disposed on the surface of the light guide plate 30 facing the bottom plate 11, and the plurality of first compensation dots 32 are disposed around the periphery of the positioning notch 311, so that the probability of refraction and reflection of the light due to sound emission can be increased due to the presence of the first compensation dots 32, thereby increasing the light quantity at the position, i.e., the brightness is compensated, effectively avoiding the occurrence of dark corners, and ensuring the uniformity of the light output of the backlight module 100. Referring to fig. 4, since the light guide plate is made of a transparent material, the first compensation dots 32 at the bottom can be seen from the upper surface, where the first compensation dots 32 may be in the form of bumps, pits, or ribs, and the cross section of the first compensation dots may be in the form of circles, squares, or polygons, which are not limited herein. The density range of the first compensation dots 32 can also be set according to the size of the actual product.
It can be understood that, in the design of the light guide plate 30, the surface is provided with dots to enhance the light extraction effect, and here, the density of the dots at the periphery of the positioning notch 311 can be increased while the surface is provided with the dots, so as to compensate the lost brightness.
In an alternative embodiment, a plurality of second compensation dots (not shown) are disposed on a surface of the light guide plate 30 facing the bottom plate 11, and the plurality of second compensation dots correspond to a gap between two beads 22.
It can be understood that, because of the interval arrangement of a plurality of lamp pearls 22, and the light-emitting scope of every lamp pearl 22 is limited, the light that gets in the space between two adjacent lamp pearls 22 is less than the light in the position that corresponds with lamp pearl 22, so in this embodiment, with light guide plate 30 towards the surface of bottom plate 11 be equipped with a plurality of second compensation sites, a plurality of second compensation sites correspond and two lamp pearls 22 between the space department. Here, the structure and the shape of second compensation site can be with the same of first compensation site 32, also can not be the same, only need can carry out reflection and refraction many times to incident light can, thereby promote the light brightness of the space department between two lamp pearls 22, effectively promote backlight unit 100's light-emitting homogeneity, combine reference column 111 and locating hole 211 and locating notch 311's cooperation, effectively guarantee the position relation between lamp strip 20 and the light guide plate 30, can eliminate the lamp shadow phenomenon in structural design, avoid appearing the lamp shadow problem because of the equipment, promote backlight unit 100's light-emitting effect.
Referring to fig. 2 again, in an alternative embodiment, the backlight module 100 further includes an adhesive 40, one surface of the adhesive 40 is fixed to the back plate 10, at least a portion of the other surface is attached to the surface of the substrate 21 facing the back plate 10, and the adhesive 40 is provided with an avoiding hole 41 corresponding to the positioning hole 211.
In this embodiment, in order to mount the light bar 20, the light bar 20 is adhered to the back plate 10 by the adhesive member 40. Specifically, the adhesive member 40 may be a liquid adhesive, a solid adhesive, or a fixed adhesive tape, such as a single-sided adhesive or a double-sided adhesive. Certainly, in order to facilitate the bonding, the bonding member 40 is a double-sided tape, one surface of the bonding member 40 is fixed to the back plate 10, and the other surface of the bonding member is adhered to the surface of the substrate 21 facing the back plate 10, that is, the surface of the substrate facing away from the lamp beads 22, so that the stable installation is realized, the occupied space can be reduced, and the thickness of the backlight module 100 is effectively reduced. Certainly, in order to achieve stable fixation, at least a portion of the adhesive member 40 is completely attached to the surface of the substrate 21, and here, for the penetrating of the positioning column 111, a corresponding avoiding hole 41 is formed in the adhesive member 40, so that it is ensured that the positioning between the light bar 20 and the light guide plate 30 is not affected. Of course, in other embodiments, the light bar 20 can be fixed by other fixing methods, such as clamping or clipping.
Here, the shape of the avoiding hole 41 is the same as that of the positioning hole 211, and details are not described here, so that a better positioning effect and a better deformation space can be ensured. The light guide plate 30 may be fixed to the other side of the base plate 11 by adhesion.
In an optional embodiment, the backlight module 100 further includes a reflective member 50, the reflective member 50 is sandwiched between the light guide plate 30 and the bottom plate 11, a part of a surface of the adhesive member 40 facing away from the bottom plate 11 is fixed to the substrate 21, and another part of the surface is fixed to the reflective member 50.
In this embodiment, the backlight module 100 further includes a reflector 50, and the reflector 50 is disposed between the light guide plate 30 and the back plate 10, so that the light transmitted from the light guide plate 30 can be further reflected and returned to the light guide plate 30, and continuously emitted from one side of the light exit, and the light output amount is increased, and at the same time, the efficiency of the light source can be improved. Here, the edge of the reflector 50 does not correspond to the positioning post 111, so that a corresponding opening is not required. Of course, in other embodiments, when the edge of the reflector 50 abuts against the positioning post 111, a corresponding avoiding hole is also required to be formed. The reflector 50 may be a reflective lens, a polymer reflective film layer, a reflective metal sheet, or the like, and is not limited herein.
Here, in order to facilitate the fixing of the reflector 50, the same adhesive member 40 is used as the light bar 20, one surface of the adhesive member 40 is fixed on the base plate 11, one end of the other surface is adhered to the substrate 21, and the other end is adhered to the reflector 50, so that the reflector 50 can be stably fixed, and the position of the reflector 50 can be ensured. Optionally, the bonding member 40 is a splicing body, i.e., it is generally a single-sided adhesive, and the other half is a double-sided adhesive, the reflecting member 50 and the bottom plate 11 are made of double-sided adhesive, and the light bar 20 and the bottom plate 11 are made of single-sided adhesive, so that the light bar 20 is fixed on the bonding member 40, the bonding member 40 is fixed to the corresponding bottom plate 11, and finally the reflecting member 50 is bonded to the bonding member 40, and the bonding member 40 of the structure can be conveniently assembled by a person, thereby improving the assembly efficiency.
Referring to fig. 2, in addition, in order to improve the light emitting efficiency and the light emitting effect, the backlight module 100 further includes an optical adjustment and control element 60, i.e., an optical film, and the optical adjustment and control element 60 is disposed above the light guide plate 30, so as to form emergent light with better effect. Here, the optical adjustment and control component 60 may be a prism sheet, a brightness enhancement sheet or a diffusion plate, the prism sheet may improve the uniformity of light, the brightness enhancement sheet may increase the brightness of the emergent light, the diffusion plate may increase the emergent angle of the emergent light, and it is ensured that the edge may also receive enough light, thereby improving the brightness of the edge position, thereby providing a relatively uniform and stable light source for the display panel 200. Of course, a plurality of optical modulators 60 stacked in sequence may also be disposed, so as to further improve the uniformity and stability of the emergent light of the backlight module 100. Specifically, the optical adjustment and control element 60 is mounted on the back plate 10 and fixed by an adhesive tape, which is simple and convenient and does not occupy too much space.
Finally, the adhesive frame 70 is fixed to the back plate 10 by an adhesive tape or other adhesive members, and the light source, the light guide plate 30 and the optical adjustment member 60 are further fixed, thereby forming a stable structure.
Referring to fig. 8, the present invention further provides a display device 300, where the display device 300 includes a display panel 200 and the backlight module 100 as described above, and the display panel 200 is disposed on the light emitting side of the backlight module 100. Since the backlight module 100 of the display device 300 of the present invention employs the backlight module 100 of any of the above embodiments, the beneficial effects brought by the above embodiments are not described herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a backlight module, backlight module includes backplate, lamp strip and light guide plate, its characterized in that:
the back plate comprises a bottom plate, and a positioning column is convexly arranged on the bottom plate; the light bar is arranged on the bottom plate and is provided with a positioning hole matched with the positioning column; the light guide plate install in the bottom plate, the income plain noodles of light guide plate is towards the light-emitting side of lamp strip, the income plain noodles of light guide plate seted up with the location breach of reference column periphery looks adaptation, the reference column wears to locate in proper order the locating hole with the location breach.
2. The backlight module of claim 1, wherein the light bar comprises a substrate and a plurality of beads arranged on the substrate, the beads are arranged at intervals along an extending direction of the substrate, the substrate is provided with the positioning holes, the light guide plate is pressed against a part of the substrate towards the edge of the bottom plate, and the light incident surface of the light guide plate is attached to the beads.
3. The backlight module as claimed in claim 2, wherein there are two positioning posts, two positioning posts are spaced apart from each other on the bottom plate along the extending direction of the light bar, there are two positioning holes, and there are two positioning notches.
4. The backlight module as claimed in claim 3, wherein the positioning posts are cylinders, one of the positioning holes is a circular hole, the positioning gap corresponding to the circular hole is a semicircular gap, the other positioning hole is an oblong hole, the positioning gap corresponding to the oblong hole is an oblong gap, and the length directions of the oblong hole and the oblong gap are consistent with the length direction of the light bar.
5. The backlight module as claimed in claim 4, wherein the center-to-center distance of the oblong holes is F, and the extension length of the light guide plate along the light bar is L, wherein F is 2% o L to 4% o L.
6. The backlight module according to any one of claims 2 to 5, wherein the surface of the light guide plate facing the bottom plate is provided with a plurality of first compensation dots, and the plurality of first compensation dots are disposed around the periphery of the positioning notch.
7. The backlight module according to any one of claims 2 to 5, wherein a plurality of second compensation dots are disposed on a surface of the light guide plate facing the bottom plate, and the plurality of second compensation dots correspond to gaps between two of the beads.
8. The backlight module according to any one of claims 2 to 5, further comprising an adhesive member, wherein one surface of the adhesive member is fixed to the back plate, at least a portion of the other surface is attached to the surface of the substrate facing the back plate, and the adhesive member has an avoiding hole corresponding to the positioning hole.
9. The backlight module as claimed in claim 8, wherein the backlight module further comprises a reflective member sandwiched between the light guide plate and the bottom plate, and a portion of a surface of the adhesive member facing away from the bottom plate is fixed to the substrate and another portion is fixed to the reflective member.
10. A display device, comprising a display panel and a backlight module according to any one of claims 1 to 9, wherein the display panel is disposed on a light-emitting side of the backlight module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111258869.2A CN114035260A (en) | 2021-10-27 | 2021-10-27 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111258869.2A CN114035260A (en) | 2021-10-27 | 2021-10-27 | Backlight module and display device |
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| CN114035260A true CN114035260A (en) | 2022-02-11 |
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|---|---|---|---|---|
| US20060006777A1 (en) * | 2004-07-06 | 2006-01-12 | Au Optronics Corp. | Backlight assembly for a hand-held liquid crystal display |
| CN102734713A (en) * | 2012-07-13 | 2012-10-17 | 深圳市华星光电技术有限公司 | LED (light-emitting diode) backlight module |
| CN102748651A (en) * | 2012-05-15 | 2012-10-24 | 达运精密工业（厦门）有限公司 | Backlight module and liquid crystal display device |
| CN107861188A (en) * | 2017-09-29 | 2018-03-30 | 广东深越光电技术有限公司 | A kind of backlight module of the brightness of its lifting dark space of light guide plate and utilization |
| CN113253516A (en) * | 2021-05-13 | 2021-08-13 | 京东方科技集团股份有限公司 | Backlight module and display device |
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2021
- 2021-10-27 CN CN202111258869.2A patent/CN114035260A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060006777A1 (en) * | 2004-07-06 | 2006-01-12 | Au Optronics Corp. | Backlight assembly for a hand-held liquid crystal display |
| CN102748651A (en) * | 2012-05-15 | 2012-10-24 | 达运精密工业（厦门）有限公司 | Backlight module and liquid crystal display device |
| CN102734713A (en) * | 2012-07-13 | 2012-10-17 | 深圳市华星光电技术有限公司 | LED (light-emitting diode) backlight module |
| CN107861188A (en) * | 2017-09-29 | 2018-03-30 | 广东深越光电技术有限公司 | A kind of backlight module of the brightness of its lifting dark space of light guide plate and utilization |
| CN113253516A (en) * | 2021-05-13 | 2021-08-13 | 京东方科技集团股份有限公司 | Backlight module and display device |
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