CN114167645B - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN114167645B CN114167645B CN202111428440.3A CN202111428440A CN114167645B CN 114167645 B CN114167645 B CN 114167645B CN 202111428440 A CN202111428440 A CN 202111428440A CN 114167645 B CN114167645 B CN 114167645B
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- Prior art keywords
- back plate
- backlight module
- waterproof coating
- light guide
- guide plate
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 90
- 238000000576 coating method Methods 0.000 claims abstract description 90
- 239000000853 adhesive Substances 0.000 claims description 69
- 230000001070 adhesive effect Effects 0.000 claims description 69
- 239000012788 optical film Substances 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 15
- 230000003287 optical effect Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 12
- 239000010408 film Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- -1 Polyethylene terephthalate Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000012994 photoredox catalyst Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005041 Mylar™ Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
A backlight module and a liquid crystal display device, the backlight module comprises a back plate, a light guide plate, a reflecting structure and a waterproof coating, wherein the back plate is provided with a through hole, the light guide plate is arranged on one side of the back plate, the reflecting structure is arranged on the surface of the light guide plate, which faces the back plate, the waterproof coating is arranged on the surface of the reflecting structure, which faces the back plate, the orthographic projection of the waterproof coating on the back plate covers the through hole, and the waterproof coating is fixedly adhered to the back plate. Through set up waterproof coating between light guide plate and backplate, and make waterproof coating cover the through-hole on the backplate, through making waterproof coating bond fixedly with the backplate to prevent that steam from penetrating from the reflecting structure or getting into inside the backlight unit from the gap between through-hole and the backplate, improved backlight unit's waterproof performance, improved liquid crystal display device's life.
Description
Technical Field
The invention belongs to the technical field of liquid crystal display, and particularly relates to a backlight module and a liquid crystal display device.
Background
In modern society, the display is optimized and developed continuously in the direction of light weight, and how to design the lcd module is important. The existing liquid crystal display device can lighten the weight of the liquid crystal display device, save materials and reduce production cost by designing the hollowed-out area on the back plate of the backlight module.
However, since the reflective sheet and the back plate at the hollowed-out portion are not sealed, water vapor enters the backlight module from the hollowed-out portion of the back plate, and the internal components of the backlight module are wetted, so that the liquid crystal display device is poor in display.
Disclosure of Invention
The invention aims to provide a backlight module and a display device, which have excellent waterproof performance and are beneficial to ensuring the display effect of a liquid crystal display module.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
In a first aspect, the invention provides a backlight module, which comprises a back plate and a light guide plate, wherein the back plate is provided with a through hole, and the light guide plate is arranged on one side of the back plate. The light guide plate comprises a back plate, a reflecting structure and a waterproof coating, wherein the reflecting structure is arranged on the surface of the light guide plate, the surface of the back plate faces the reflecting structure, the waterproof coating is arranged on the surface of the back plate, orthographic projection of the waterproof coating on the back plate covers the through hole, and the waterproof coating is fixedly bonded with the back plate.
In one embodiment, the backlight module comprises a first bonding piece, the first bonding piece is arranged on the edge, close to the through hole, of the back plate, and the waterproof coating is bonded and fixed with the back plate through the first bonding piece.
In one embodiment, the back plate comprises a first back plate and a second back plate, the first back plate is provided with the through hole, the second back plate is connected with the surface of the first back plate opposite to the light guide plate, the second back plate extends out of the through hole, the first bonding piece is arranged on the surface of the second back plate opposite to the light guide plate, and the thickness of the first bonding piece is greater than or equal to that of the first back plate.
In one embodiment, the backboard comprises a first backboard and a second backboard, the through hole is formed in the first backboard, the second backboard is connected to the surface of the first backboard opposite to the light guide plate, the second backboard extends out of the through hole, the light guide plate comprises a main body part and a boss, the boss is opposite to the second backboard and is abutted to the second backboard, and the main body part is fixed with the first backboard.
In one embodiment, the backlight module comprises a second bonding piece, the second bonding piece is arranged at one end, far away from the through hole, of the back plate, and the waterproof coating and the first back plate are bonded and fixed through the second bonding piece.
In one embodiment, the surface of the light guide plate facing the back plate includes a first area and a second area, the orthographic projection of the first area on the back plate covers the through hole, the second area is located at the periphery of the first area, and the waterproof coating covers the first area.
In one embodiment, the reflective structure covers the first region, and the second adhesive connects the second region of the light guide plate and the back plate; or the reflective structure covers the first area and the second area, and the second bonding piece bonds the reflective structure and the backboard of the second area; or the reflective structure covers the first area and the second area, the waterproof coating also covers the second area, and the second bonding piece bonds the waterproof coating and the backboard of the second area.
In one embodiment, the backlight module further comprises an optical film, a second bonding part, a third bonding part and a rubber frame, wherein the rubber frame is fixed on the back plate through the second bonding part, the light guide plate and the waterproof coating are provided with interval distances, and the optical film is fixed with the rubber frame through the third bonding part.
In one embodiment, the reflective structure is a reflective coating.
In a second aspect, the present invention further provides a liquid crystal display device, where the liquid crystal display device includes a liquid crystal display module and the backlight module according to any one of the embodiments of the first aspect, and the liquid crystal display module and the backlight module are stacked.
Through set up waterproof coating between light guide plate and backplate, and make waterproof coating cover the through-hole on the backplate, through making waterproof coating bond fixedly with the backplate to prevent that steam from penetrating from the reflecting structure or getting into inside the backlight unit from the gap between through-hole and the backplate, improved backlight unit's waterproof performance, improved display device's life.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of an embodiment of a backlight module of a first embodiment;
Fig. 2 is a plan view of a backlight module according to a first embodiment;
Fig. 3 is a cross-sectional view of another embodiment of the backlight module of the first embodiment;
Fig. 4 is a cross-sectional view of an embodiment of a backlight module according to a second embodiment;
fig. 5 is a cross-sectional view of another embodiment of a backlight module according to a second embodiment;
fig. 6 is a cross-sectional view of an embodiment of a backlight module of a third embodiment;
fig. 7 is a cross-sectional view of an embodiment of a backlight module of a fourth embodiment;
fig. 8 is a cross-sectional view of another embodiment of a backlight module of the fourth embodiment;
Fig. 9 is a cross-sectional view of an embodiment of a backlight module of a fifth embodiment;
fig. 10 is a cross-sectional view of another embodiment of a backlight module of the fifth embodiment;
fig. 11 is a cross-sectional view of another embodiment of a backlight module of the fifth embodiment;
fig. 12 is a cross-sectional view of another embodiment of a backlight module of the fifth embodiment;
Fig. 13 is a cross-sectional view of an embodiment of a backlight module of a sixth embodiment;
Fig. 14 is a cross-sectional view of another embodiment of a backlight module of the sixth embodiment;
Fig. 15 is a schematic structural view of an embodiment of a display device of a seventh embodiment.
Reference numerals illustrate:
100-a backlight module; 200-a liquid crystal display module;
10-a back plate; 11-a bottom plate; 12-side walls;
20-a light guide plate; 30-a reflective structure; 40-waterproof coating; 50-an optical film; a 60-optical unit;
71-a protective film; 72-protecting glue;
81-a first adhesive member; 82-a second adhesive; 83-a third adhesive;
90-rubber frame;
K1-a containing groove; k2-through holes; d1—a first region; d2—a second region;
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
First embodiment
Referring to fig. 1 and 2, a backlight module 100 provided in the embodiment of the application includes a back plate 10, a light guide plate 20, a reflective structure 30 and a waterproof coating 40, where the back plate 10 is used to support the entire backlight module 100, and includes a bottom plate 11 and a side wall 12, and the bottom plate 11 and the side wall 12 are connected to each other, and the connection manner of the bottom plate 11 and the side wall 12 may be fixed by a third party structure such as a screw, or may be a connection manner of a structure with grooves, protrusions, etc. provided on the bottom plate 11 and the side wall 12, or a connection manner of an integral structure of the bottom plate 11 and the side wall 12. The bottom plate 11 and the side wall 12 enclose a receiving groove K1, and the light guide plate 20, the reflective structure 30, the waterproof coating 40, etc. are fixedly installed in the receiving groove K1. The bottom plate 11 is provided with a through hole K2, so as to achieve the purpose of reducing the weight of the backlight module 100 by reducing the material of the back plate 10.
The light guide plate 20 is made of polycarbonate PC or polymethyl methacrylate PMMA, which is advantageous in reducing light loss. The light guide plate 20 is disposed on one side of the bottom plate 11, the reflective structure 30 is disposed on a surface of the light guide plate 20 opposite to the bottom plate 11, and the reflective structure 30 may cover the entire surface of the light guide plate 20 facing the back plate 10, or may cover an area of the surface near the through hole K2. The material of the reflective structure 30 may be a metal material, an inorganic material, an organic metal material, or a ceramic material without optical properties, such as PbO, siC, tiO and PbS, so that the refraction times of the light in the light guide plate 20 can be increased and the mixing effect of the light can be improved by the material without optical properties; or may be an optical material such as polycarbonate PC or polymethyl methacrylate PMMA, and the reflective structure 30 made of a transparent optical material can diffuse reflection of light in the reflective structure 30, so that the number of times of diffuse reflection of light is further increased, and the mixing effect of light is improved. In addition, the reflecting structure 30 has good thermal conductivity, and can disperse and guide out the heat of the light source body, so as to avoid damage caused by overheating of the components in the backlight module 100. The reflective structure 30 may be a reflective sheet, in this embodiment, the reflective structure 30 is a reflective coating coated on the surface of the light guide plate 20, and the thickness of the reflective coating is thinner, so that the height of the backlight module 100 can be reduced while the light mixing effect is improved, and meanwhile, the weight of the backlight module 100 is reduced, which is beneficial to realizing the light and thin of the electronic device.
The waterproof coating 40 is disposed on the surface of the reflective structure 30 facing the back plate 10, and the waterproof coating 40 is made of a transparent waterproof material, such as a PET (Polyethylene terephthalate ) material, a mylar material, or a diffusion sheet optical material. The orthographic projection of the waterproof coating 40 on the back plate 10 covers the through hole K2 and is adhered and fixed with the back plate 10.
The backlight module 100 further includes an optical film 50, an optical unit 60, and a third adhesive 83. The optical film 50 is stacked on the surface of the light guide plate 20 facing away from the reflective structure 30, and the optical unit 60 is disposed on the side of the optical film 50 facing away from the light guide plate 20 and spaced apart from the optical film 50. The third adhesive 83 is disposed on the edge of the optical film 50 and the optical unit 60 near the side wall 12, and in this embodiment, the third adhesive 83 is a double-sided adhesive, and two opposite surfaces of the third adhesive are respectively connected to the optical film 50 and the optical unit 60 to fix the optical unit 60 on the optical film 50. The optical film 50 may include one or more of diffusion plates, brightness enhancement films, composite brightness enhancement films, diffusion sheets, etc., and the optical unit 60 may include one or more of TFT sheets, polarizers, color filters, spacers, common sheets (transparent indium tin oxide) and liquid crystals, and the optical film 50 and the optical unit 60 are matched with each other for enhancing brightness and uniformity of light.
The backlight module 100 further includes a protective film 71, where the protective film 71 is stacked on a surface of the optical unit 60 facing away from the optical film 50. The protective film 71 may be made of PE (Polyethylene), so that the protective film 71 is disposed in the backlight module 100, which is beneficial to preventing the backlight module 100 from being polluted, corroded and scratched during transportation and use, thereby improving the quality of the product. In addition, the backlight module 100 further includes a protective adhesive 72, where the protective adhesive 72 is disposed on an outer surface of the back plate 10 opposite to the accommodating groove K1, and a brown mylar tape may be used to achieve protection effects such as fixing, insulation and fireproof of the backlight module 100.
Through setting up waterproof coating 40 between light guide plate 20 and backplate 10, and make waterproof coating 40 on backplate 10 orthographic projection cover through-hole K2, through making waterproof coating 40 and backplate 10 bond fixedly to prevent that steam from penetrating from reflecting structure 30 or getting into backlight unit 100 inside from the gap between through-hole K2 and the backplate 10, improved backlight unit 100's waterproof performance, improved display device's life.
In another possible embodiment, referring to fig. 3, the surface of the light guide plate 20 facing the back plate 10 includes a first area D1 and a second area D2, where the front projection of the first area D1 on the back plate 10 covers the through hole K2, the second area D2 is located at the periphery of the first area D1, and the waterproof coating 40 is disposed on the first area D1. Through making the first region D1 cover the through hole K2, and the waterproof coating 40 is disposed in the first region D1, not only can prevent vapor from penetrating from the reflective structure 30 or from the gap between the through hole K2 and the back plate 10 entering the backlight module 100, but also is beneficial to reducing the material of the waterproof coating 40 compared with the structure in which the waterproof coating 40 is disposed on the entire surface of the light guide plate 20 facing the back plate 10, thereby reducing the manufacturing cost.
Second embodiment
Referring to fig. 1 and 4, in the present embodiment, the backlight module 100 further includes a first adhesive member 81, a second adhesive member 82, and a frame 90. The reflective structure 30 and the waterproof coating 40 cover the first area D1 and the second area D2, the first adhesive member 81 is a sealant, and is disposed on the edge of the back plate 10 close to the through hole K2, and two opposite surfaces of the first adhesive member are respectively connected with the waterproof coating 40 and the bottom plate 11, so as to bond and fix the waterproof coating 40 and the back plate 10, and further, the reflective structure 30, the light guide plate 20 and the like are fixed in the accommodating groove K1. The glue frame 90 is disposed between the light guide plate 20 and the sidewall 12 for fixing the backlight module 100. A second adhesive 82 is further disposed between the adhesive frame 90 and the bottom plate 11, and the adhesive frame 90 is fixed on the back plate 10 through the second adhesive 82. And the second adhesive 82 is spaced from the waterproof coating 40, thereby being beneficial to reducing the usage amount of the second adhesive 82 and reducing the manufacturing cost. In addition, a third adhesive 83 is disposed between the optical film 50 and the adhesive frame 90 to fix the optical film 50 and the adhesive frame 90. Meanwhile, the adhesive frame 90 is fixed with the back plate 10, so that the purpose of fixing the optical film 50 and the optical unit 60 on the back plate 10 is achieved.
The waterproof coating 40 is fixed with the bottom plate 11 by arranging the first bonding piece 81 at the edge position of the bottom plate 11 close to the through hole K2, so that the components in the backlight module 100 are firmly installed, and the gap between the through hole K2 and the back plate 10 is sealed. In this embodiment, the second adhesive 82 has a distance from the light guide plate 20 and the waterproof coating 40, so that the amount of the second adhesive 82 is reduced, and the material cost is saved.
In another possible embodiment, referring to fig. 1 and 5, the second adhesive 82 is disposed at an end of the back plate 10 away from the through hole K2, the waterproof coating 40 covers the entire surface of the light guide plate 20 facing the bottom plate 11, and the waterproof coating 40 and the back plate 10 are simultaneously adhered and fixed by the first adhesive 81 and the second adhesive 82. Through the condition that the first bonding piece 81 and one end of the waterproof coating 40 close to the through hole K2 are bonded and fixed with the back plate 10, the second bonding piece 82 is further arranged to bond and fix one end of the waterproof coating 40 away from the through hole K2 with the back plate 10, so that the connection between the parts in the backlight module 100 and the back plate 10 is more stable, the inner parts of the backlight module 100 are prevented from being scattered when the backlight module falls and collides, and the quality of the backlight module 100 is improved.
Third embodiment
Referring to fig. 1 and 6, in the present embodiment, the reflective structure 30 covers the first area D1 and the second area D2, the waterproof coating 40 covers the first area D1, the first adhesive member 81 connects the waterproof coating 40 and the bottom plate 11, the light guide plate 20 is fixed on the bottom plate 11 through the first adhesive member 81, and the second adhesive member 82 is connected to a surface of the reflective coating 30 facing away from the second area D2, so as to fix a side of the light guide plate 20 away from the through hole K2 to the back plate 10. In this embodiment, the waterproof coating 40 only covers the first area D1, and the reflective structure 30 covers the entire surface of the light guide plate 20 opposite to the bottom plate 11, so that the amount of the waterproof coating 40 is reduced, the light efficiency of the edge light of the backlight module 100 is also considered, and the good waterproof performance is achieved, and meanwhile, the good display effect is also achieved.
Fourth embodiment
Referring to fig. 1 and 7, in the present embodiment, the reflective structure 30 and the waterproof coating 40 both cover the first area D1, the surface of the light guide plate 20 located in the second area D2 is opposite to the bottom plate 11, the waterproof coating 40 and the bottom plate 11 are connected by the first adhesive 81, the edge of the light guide plate 20 close to the through hole K2 is fixed on the bottom plate 11 by the first adhesive 81, the surface of the second area D2 of the light guide plate 20 and the bottom plate 11 are connected by the second adhesive 82, and the edge of the light guide plate 20 far away from the through hole K2 is fixed on the bottom plate 11 by the second adhesive 82. The structure of the present embodiment can fix the light guide plate 20 and the back plate 10 through the adhesive member 81 and the second adhesive member 82 at the same time, so that the structure of the backlight module 100 is more stable, and the material saving effect of the waterproof coating 40 and the reflective structure 30 is achieved.
In another possible embodiment, referring to fig. 1 and 8, in this embodiment, the reflective structure 30 and the waterproof coating 40 both cover the first area D1, the surface of the light guide plate 20 located in the second area D2 is opposite to the bottom plate 11, and the first adhesive member 81 is connected to the waterproof coating 40. The second adhesive 82 is disposed between the frame 90 and the back plate 10, and the waterproof coating 40 and the light guide plate 20 are spaced apart from the second adhesive 82. In this embodiment, the reflective structure 30 and the waterproof coating 40 are covered only in the first area D1, so that the usage amount of the reflective structure 30 and the waterproof coating 40 is reduced, and the usage amount of the second adhesive 82 is further reduced by arranging the second adhesive 82 at intervals with the waterproof coating 40 and the light guide plate 20, so that the manufacturing cost of the backlight module 100 is greatly reduced.
Fifth embodiment
Referring to fig. 1 and 9, the back plate 10 includes a first back plate 13 and a second back plate 14, the first back plate 13 is provided with a through hole K2, and the second back plate 14 is connected to the surface of the first back plate 13 opposite to the light guide plate 20 and extends toward the through hole K2. The first adhesive member 81 is disposed on the surface of the second back plate 14 facing the light guide plate 20, and the thickness of the first adhesive member 81 is greater than or equal to the thickness of the first back plate 13, so as to achieve connection between the waterproof coating 40 and the second back plate 14, thereby sealing the gap between the through hole K2 and the light guide plate 20. The backlight module 100 further includes a second adhesive member 82, wherein the reflective structure 30 and the waterproof coating 40 cover the first area D1 and the second area D2, that is, the reflective structure 30 and the waterproof coating 40 cover the entire surface of the light guide plate 20 facing the back plate 10, and the second adhesive member 82 adheres the waterproof coating 40 and the first back plate 13 of the second area D2. By making the back sheet 10 include the first back sheet 13 and the second back sheet 14, and disposing the second adhesive member 82 between the first back sheet 13 and the waterproof coating 40, the edge of the light guide plate 20 on the side away from the through hole K2 is adhesively fixed to the back sheet 10. Through setting up second backplate 14, and second backplate 14 extends and form reinforced structure towards through-hole K2, be favorable to improving backplate 10 at the intensity of through-hole K2 edge, reduce backplate 10's deformation probability, improve product quality. And the first bonding piece 81 is arranged on the second backboard 14 to bond and fix the waterproof coating 40 and the second backboard 14, so that the fixing effect between the light guide plate 20 and the backboard 10 can be further enhanced, and the sealing effect on the joint of the through hole K2 and the backboard 10 is realized.
In other possible embodiments, referring to fig. 10, 11 and 12, the backlight module 100 shown in fig. 10 reduces the area of the waterproof coating 40 based on the structure of the backlight module 100 shown in fig. 9, so that the waterproof coating 40 covers only the first area D1, and the second adhesive 82 connects the first back plate 13 and the surface of the reflective structure 30 facing away from the second area D2, thereby facilitating the reduction of the material of the waterproof coating 40 and saving the cost.
In the backlight module 100 shown in fig. 11, in the structure of the backlight module 100 shown in fig. 10, the area of the reflective structure 30 is further reduced, so that the reflective structure 30 and the waterproof coating 40 only cover the first area D1, the second adhesive member 82 connects the first back plate 13 and the surface of the light guide plate 20 located in the second area D2, and the use amount of the reflective structure 30 and the waterproof coating 40 is reduced while the light guide plate 20 and the back plate 10 are stably connected, thereby achieving the purpose of saving cost.
The backlight module 100 shown in fig. 12 is based on the backlight module 100 shown in fig. 11, so that the second adhesive 82 and the second area D2 are also arranged at intervals, that is, the light guide plate 20 is fixedly connected with the second back plate 14 only through the first adhesive 81, thereby further reducing the usage amount of the second adhesive 82 and saving the manufacturing cost.
Sixth embodiment
Referring to fig. 1, 13 and 14, the back plate 10 includes a first back plate 13 and a second back plate 14, the first back plate 13 is provided with a through hole K2, the second back plate 14 is connected to the surface of the first back plate 13 opposite to the light guide plate 20, the through hole K2 penetrates through the first back plate 13 and the second back plate 14, and the second back plate 14 extends out towards the through hole K2. The light guide plate 20 includes a main body portion 21 and a boss 22, the boss 22 is disposed opposite to the second back plate 14, and the boss 22 includes a first bottom surface 221 and a first side surface 222, a surface of the second back plate 14 facing the light guide plate 20 is opposite to the first bottom surface 221, a surface of the first back plate 13 facing the through hole K2 is opposite to the first side surface 222, and the main body portion 21 is opposite to a surface of the first back plate 13 facing the light guide plate 20. The backlight module 100 further includes a second adhesive member 82, as shown in fig. 13, when the waterproof coating 40 covers the first surface 221, the first side 222, and the entire surface of the main body 21 opposite to the first back plate 13, the second adhesive member 82 connects the waterproof coating 40 of the main body 21 and the first back plate 13 to fix the light guide plate 20 on the back plate 10, the waterproof coating 40 of the first bottom surface 221 is attached to the surface of the second back plate 14 facing the light guide plate 20, and the waterproof coating 40 of the first side 222 is attached to the surface of the first back plate 13 facing the through hole K2, thereby achieving the effect of sealing the gap between the light guide plate 40 and the back plate 10.
As shown in fig. 14, when the waterproof coating 40 covers a partial area of the main body portion 21, that is, the edge of the light guide plate 20 away from the through hole K2, the waterproof coating 40 is not provided, and at this time, the second adhesive member 82 connects the main body portion 21 and the first back plate 13 to fix the light guide plate 20 to the back plate 10, while also reducing the material of the waterproof coating 40. By providing the body portion 21 and the boss 22 on the light guide plate 20, the body portion 21 is used to be connected with the second adhesive 82 to achieve a fixing effect on the light guide plate 20. The boss 22 is used for being connected with the first backboard 13 to realize the sealing and waterproof effects, and the boss 22 is matched with the second backboard 14, so that the structural strength of the edge of the through hole K2 of the backlight module 100 is further improved.
Similarly, the coverage area of the waterproof coating 40 can be further reduced based on the backlight module 100 shown in fig. 13, for example, the usage amount of the waterproof coating 40 is reduced by providing the reflective structure 30 to cover the first area D1 and the second area D2, and the waterproof coating 40 covers the first area D1; or the reflective structure 30 and the waterproof coating 40 can only cover the first area D1, and the second adhesive 82 and the waterproof coating 40 are spaced apart, so as to further reduce the usage of the second adhesive 82 and achieve the purpose of saving cost.
Seventh embodiment
The embodiment of the application also provides a liquid crystal display device, please refer to fig. 15, the liquid crystal display device includes the backlight module 100 and the liquid crystal display module 200 of any of the embodiments, the liquid crystal display module 200 and the backlight module 100 are stacked, and the liquid crystal display module 200 modulates the light of the backlight module 100 and displays the modulated light. By adopting the backlight module 100 provided by the embodiment of the application in the liquid crystal display device, water vapor can be prevented from entering the backlight module 100 from the gap between the liquid crystal display module 200 and the backlight module 100, the internal components of the backlight module 100 are prevented from being wetted, and the product quality of the liquid crystal display device is improved.
The above disclosure is only a preferred embodiment of the present invention, and it should be understood that the scope of the invention is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present invention.
Claims (7)
1. The backlight module comprises a back plate and a light guide plate, wherein the back plate is provided with a through hole, and the light guide plate is arranged on one side of the back plate;
The back plate comprises a first back plate and a second back plate, the first back plate is provided with the through hole, the second back plate is connected to the surface of the first back plate, which is opposite to the light guide plate, and the second back plate extends out of the through hole, the light guide plate comprises a main body part and a boss, the boss is opposite to the second back plate and is abutted to the second back plate, and the main body part is fixed with the first back plate;
The boss comprises a first bottom surface and a first side surface, the surface of the second backboard facing the light guide plate is opposite to the first bottom surface, and the waterproof coating of the first side surface is attached to the surface of the first backboard facing the through hole.
2. The backlight module according to claim 1, wherein the backlight module comprises a second adhesive member, the second adhesive member is disposed at an end of the back plate away from the through hole, and the waterproof coating and the back plate are adhered and fixed by the second adhesive member.
3. The backlight module according to claim 1, wherein a surface of the light guide plate facing the back plate includes a first region and a second region, an orthographic projection of the first region on the back plate covers the through hole, the second region is located at an outer periphery of the first region, and the waterproof coating covers the first region.
4. A backlight module according to claim 3, wherein the backlight module further comprises a second adhesive member;
The reflecting structure covers the first area, and the second bonding piece is connected with the second area of the light guide plate and the backboard; or the reflective structure covers the first area and the second area, and the second bonding piece bonds the reflective structure and the backboard of the second area; or the reflective structure covers the first area and the second area, the waterproof coating also covers the second area, and the second bonding piece bonds the waterproof coating and the backboard of the second area.
5. The backlight module of claim 1, further comprising an optical film, a second adhesive, a third adhesive, and a frame, wherein the frame is fixed to the back plate by the second adhesive, the second adhesive is spaced from the light guide plate and the waterproof coating, and the optical film is fixed to the frame by the third adhesive.
6. The backlight module of claim 1, wherein the reflective structure is a reflective coating.
7. A liquid crystal display device, comprising a liquid crystal display module and a backlight module according to any one of claims 1 to 6, wherein the liquid crystal display module and the backlight module are stacked.
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| CN202111428440.3A CN114167645B (en) | 2021-11-26 | 2021-11-26 | Backlight module and liquid crystal display device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM332207U (en) * | 2007-09-17 | 2008-05-11 | Radiant Opto Electronics Corp | Backlighting module structure with protective invasion of foreign matter |
| CN113138498A (en) * | 2021-04-22 | 2021-07-20 | 武汉华星光电技术有限公司 | Display module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292213B (en) * | 2012-12-31 | 2016-07-06 | 上海中航光电子有限公司 | A kind of backlight module and display module |
| CN206057753U (en) * | 2016-08-29 | 2017-03-29 | 昆明市迅隆防水工程有限公司 | A kind of waterproof construction of backlight module |
| CN113075822A (en) * | 2021-04-07 | 2021-07-06 | 厦门天马微电子有限公司 | Backlight module and display device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM332207U (en) * | 2007-09-17 | 2008-05-11 | Radiant Opto Electronics Corp | Backlighting module structure with protective invasion of foreign matter |
| CN113138498A (en) * | 2021-04-22 | 2021-07-20 | 武汉华星光电技术有限公司 | Display module |
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