CN115209705B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN115209705B CN115209705B CN202210900779.7A CN202210900779A CN115209705B CN 115209705 B CN115209705 B CN 115209705B CN 202210900779 A CN202210900779 A CN 202210900779A CN 115209705 B CN115209705 B CN 115209705B
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- 239000002826 coolant Substances 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 238000007654 immersion Methods 0.000 claims abstract description 30
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims description 13
- 230000008093 supporting effect Effects 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 16
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 description 5
- 239000012788 optical film Substances 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20981—Liquid coolant without phase change
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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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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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
- G02F1/133628—Illuminating devices with cooling means
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Theoretical Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The application discloses backlight module and display device, the backlight module includes box, concatenation support, radiator unit and a plurality of lamp plate, the concatenation support is fixed on the box, a plurality of lamp plates and the installation position on the concatenation support one-to-one fixed setting, and make the bottom of lamp plate spill from the fretwork area of installation position, a plurality of the bottom of lamp plate, the bottom of concatenation support with form airtight immersion cavity between the box; the heat dissipation assembly comprises an input pipe, an output pipe, a cooling unit, a pump and a cooling medium, wherein the immersion cavity is filled with the cooling medium, the input pipe and the output pipe are communicated with the immersion cavity, and the output pipe, the cooling unit, the pump and the input pipe are sequentially connected. The application adopts the immersive cooling design, can directly absorb the heat on the lamp plate, directly avoided the thermal rising on the lamp plate for backlight unit possesses very good radiating effect, has guaranteed backlight unit's life.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
The large-screen display screen adopts the technology of splicing lamp panels, and because each lamp panel is provided with a plurality of LED lamp beads, higher heat is easy to generate. Especially, the large commercial LED display preparation and even Mini LED display equipment is required to have higher brightness, but the high brightness is accompanied with the occurrence of high temperature problem, so that the continuous operation of the Mini LED display equipment in a high temperature environment can greatly shorten the service life of LED lamp beads, and therefore, the Mini LED display equipment is required to have good heat dissipation performance.
The air cooling system is added in the conventional heat dissipation mode of the display equipment, but the air cooling system has high energy consumption and high noise during heat dissipation, and the heat dissipation effect is poor, so that the user experience is affected.
Disclosure of Invention
The application aims to provide a backlight module and a display device which are low in energy consumption, low in noise and good in radiating effect during radiating.
The application discloses backlight module, the backlight module includes box, concatenation support, radiator unit and a plurality of lamp plate, the concatenation support is fixed on the box, just be equipped with a plurality of fretwork installation positions on the concatenation support; the lamp panels are fixedly arranged in one-to-one correspondence with the mounting positions, the bottoms of the lamp panels leak out of the hollow areas of the mounting positions, and a closed immersing cavity is formed among the bottoms of the lamp panels, the bottoms of the splicing brackets and the box body; the heat dissipation assembly comprises an input pipe, an output pipe, a cooling unit, a pump and a cooling medium, wherein the cooling medium is filled in the immersion cavity, the input pipe and the output pipe are respectively arranged on the box body and communicated with the immersion cavity, the output pipe, the cooling unit, the pump and the input pipe are sequentially connected, and the cooling unit cools the cooling medium flowing out of the output pipe; the pump controls the cooling medium in the immersion cavity to flow out of the output pipe, and after being cooled by the cooling unit, the cooling medium flows back into the immersion cavity from the input pipe.
Optionally, the mounting position is in an annular structure, the section of the mounting position is in a step shape, the edge bottom of the lamp panel is higher than the bottom of the central area of the edge, the edge bottom of the lamp panel is attached to the step surface of the mounting position, and the bottom of the central area of the edge is level with the bottom of the lamp panel bracket; the lamp panel and the installation position are fixed by bonding through waterproof adhesive tapes.
Optionally, the box body includes a bottom plate, a first side plate, a support plate and a second side plate, where the bottom plate is located at the bottom of the lamp panel and is opposite to the lamp panel; the first side plate is vertically connected with the edge of the bottom plate, is arranged around the bottom plate and extends towards the direction of the lamp panel; the support plate is of an annular or square structure, is connected with one end of the first side plate, which is far away from the bottom plate, is arranged in parallel with the bottom plate, and extends along the direction far away from the bottom plate; the edge of the splicing bracket is fixedly bonded with the supporting plate through a waterproof adhesive tape; the second side plate is of an annular or square structure, is connected with one end of the supporting plate, which is far away from the first side plate, is vertically arranged with the first side plate, and extends towards the direction far away from the bottom plate; the bottom plate, the first side plate, the bottoms of the splicing brackets and the bottoms of the plurality of lamp panels form a closed immersion cavity.
Optionally, the bottom of concatenation support is equipped with a plurality of support columns, be equipped with the screw hole in the support column, be equipped with on the bottom plate a plurality of with the via hole of screw hole one-to-one, the support column with the bottom plate butt, and through the screw with the cooperation of via hole, screw hole will the bottom plate with the support column is fixed.
Optionally, the support columns are disposed corresponding to the top corners of each of the mounting positions, and are disposed corresponding to the middle positions of each side of each of the mounting positions.
Optionally, a routing channel extending towards the bottom plate direction is arranged at the bottom of each lamp panel, and the routing channel is hollow and integrally formed with the lamp panel; the bottom plate is provided with a plurality of wiring holes, the wiring holes are matched with the wiring channels in a one-to-one correspondence manner, and the joint of the wiring holes and the wiring channels is sealed through a waterproof gasket; the wiring communicated with the lamp beads on the lamp panel extends to one side, far away from the lamp panel, of the bottom plate through the wiring channel and the wiring hole.
Optionally, when the backlight module is used, the input tube is located at the bottom of the box, and the output tube is located at the top of the box.
Optionally, the input pipe and the output pipe are respectively located at two opposite angles of the box body.
Optionally, the bottom of the lamp panel is coated with a waterproof coating.
The application also discloses a display device, display device includes display panel and as above backlight unit, display panel fixes backlight unit is last, backlight unit is for display panel provides backlight.
Compared with the scheme that an air cooling system is additionally arranged in the display equipment, the air cooling system is utilized for radiating the lamp panel and the lamp beads; according to the backlight module, the heat dissipation component is additionally arranged in the backlight module, the lamp panel and the lamp beads are subjected to heat dissipation through the cooling medium, only a small amount of electric quantity is needed to control the operation of the pump, and the cooling medium is not needed to flow rapidly, so that the electric quantity of the heat dissipation component during operation is greatly saved; and compare the sound that causes when fan operation in air cooling system, the cooling module is when the operation, and the sound that coolant medium's flow and pump caused when the during operation is all less, consequently adopt the heat dissipation design in this application to be favorable to reducing the energy consumption, noise reduction.
In addition, this application adopts immersive cooling design, carries out the cooling heat dissipation with the bottom direct immersion of lamp plate in cooling medium, for the water-cooling design that sets up the water pipe at backlight unit's back to and open at backlight unit's back and combine the forced air cooling design of fan, heat dissipation assembly can directly absorb the heat on the lamp plate in this application, does not receive intermediate structure or intermediate medium's influence, has directly avoided the rising of heat on the lamp plate for backlight unit possesses fine radiating effect, has guaranteed backlight unit's life.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:
fig. 1 is a schematic block diagram of a backlight module according to an embodiment of the present application;
fig. 2 is a schematic cross-sectional view of a first place of a backlight module according to an embodiment of the present application;
fig. 3 is a schematic cross-sectional view of a second portion of a backlight module according to an embodiment of the present disclosure;
fig. 4 is a schematic cross-sectional view of a third portion of a backlight module according to an embodiment of the present disclosure;
FIG. 5 is a partial schematic view of a splice holder provided in an embodiment of the present application;
FIG. 6 is a partial schematic view of another splice holder provided in an embodiment of the present application;
FIG. 7 is a partial schematic view of a case according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a display device according to an embodiment of the present application.
10, a display device; 20. a backlight module; 30. a display panel; 40. an optical film; 50. a middle frame; 51. a bottom frame; 52. a top frame; 100. a case; 110. a bottom plate; 111. a via hole; 112. a wiring hole; 120. a first side plate; 130. a support plate; 140. a second side plate; 200. splicing the brackets; 210. a mounting position; 220. a support column; 300. a lamp panel; 310. a routing channel; 400. a heat dissipation assembly; 410. an input tube; 420. an output pipe; 430. a cooling unit; 440. a pump; 450. a cooling medium; 500. an immersion cavity; 600. waterproof adhesive tape; 700. and a waterproof gasket.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.
The present application is described in detail below with reference to the attached drawings and alternative embodiments.
As shown in fig. 1 and fig. 2, the application discloses a backlight module combining an immersive cooling heat dissipation design, which aims at realizing the characteristics of low energy consumption, low noise and good heat dissipation effect during heat dissipation. And the backlight module 20 adopts the technology of splicing the lamp panels, and the lamp beads on the lamp panel 300 can be general LED lamp beads or mini LED lamp beads.
Specifically, the backlight module 20 includes a case 100, a splice bracket 200, and a plurality of light panels 300, where the case 100 is a box structure with an integrally formed structure and may be formed by stamping a metal plate; the splicing bracket 200 is preferably made of metal materials to ensure structural strength, the splicing bracket 200 is fixed on the box body 100, and a plurality of mounting positions 210 which are arrayed and hollowed out are arranged on the splicing bracket 200.
The lamp panels 300 are all installed on the splicing bracket 200, and are specifically installed in the installation positions 210 of the splicing bracket 200, and each installation position 210 is provided with one lamp panel 300; after the lamp panel 300 is mounted, the edge of the lamp panel 300 is fixed on the frame of the mounting position 210, and the bottom of the lamp panel 300 leaks from the hollow area of the mounting position 210. At this time, a closed space is formed between the bottoms of the plurality of lamp panels 300, the bottoms of the splice holders 200 and the case 100, i.e., the immersion cavity 500 is formed.
The backlight module 20 further includes a heat dissipation assembly 400, where the heat dissipation assembly 400 includes an input pipe 410, an output pipe 420, a cooling unit 430, a pump 440, and a cooling medium 450, the cooling medium 450 may be cooling liquid or cooling gas, and when the cooling medium 450 adopts cooling liquid, it may be water, fluoridized liquid, mineral oil or other cooling liquid materials, and the pump 440 is a water pump; when cooling medium 450 is a cooling gas, it may be nitrogen or other gas that may be used to cool, and pump 440 is an air pump. The cooling medium 450 is filled in the immersion cavity 500 and directly contacts with the inner wall of the box body 100, the bottom of the lamp panel 300 and the bottom of the splicing bracket 200, so that heat on the lamp panel 300, the box body 100 and the splicing bracket 200 is taken away, and heat conduction is avoided. The cooling unit 430 is a structure, device or material capable of cooling the cooling medium 450 by a fan, dry ice, a compressor, or the like.
Further, the inner wall of the case 100 and the splice holder 200 may be subjected to corrosion-preventing treatment such as plating, bluing, or coating, etc., to prevent the cooling medium 450 in the immersion chamber 500 from rusting and corroding the inner wall of the case 100 and the splice holder 200.
The input pipe 410 and the output pipe 420 are respectively disposed on the tank 100 and are communicated with the immersion cavity 500, the output pipe 420, the cooling unit 430, the pump 440 and the input pipe 410 are sequentially connected, and the cooling unit 430 cools the cooling medium 450 flowing out from the output pipe 420; the pump 440 controls the cooling medium 450 in the immersion chamber 500 to flow out of the output pipe 420, cooled by the cooling unit 430, and then flows back into the immersion chamber 500 from the input pipe 410.
Compared with the scheme that an air cooling system is additionally arranged in the display equipment, the air cooling system is utilized to dissipate heat of the lamp panel 300 and the lamp beads; in the embodiment of the present application, the heat dissipation assembly 400 is added in the backlight module 20, and the cooling medium 450 dissipates heat to the lamp panel 300 and the lamp beads, so that only a small amount of electric quantity is needed to control the operation of the pump 440, and the cooling medium 450 is not needed to flow rapidly, thereby greatly saving the electric quantity when the heat dissipation assembly 400 operates; and compare the sound that causes when fan operation in air cooling system, the cooling module 400 is when the operation, and the flow of cooling medium 450 and the sound that pump 440 caused when the during operation are all less, consequently adopt the heat dissipation design that this application embodiment provided to be favorable to reducing the energy consumption, noise reduction.
In addition, this application adopts immersion cooling design, carries out the cooling heat dissipation with the bottom direct immersion of lamp plate in cooling medium, for the water-cooling design that sets up the water pipe at the back of backlight unit 20 to and open and combine the forced air cooling design of fan at the back of backlight unit 20, the heat that heat dissipation assembly can directly on the lamp plate 300 in this application absorbs, does not receive intermediate structure or intermediate medium's influence, has directly avoided the rising of heat on the lamp plate 300 for backlight unit 20 possesses fine radiating effect, has guaranteed backlight unit 20's life.
Of course, the backlight module 20 further includes a middle frame 50 and an optical film 40, wherein the middle frame 50 is fixed on the case 100, and the optical film 40 is fixed on the middle frame 50.
As shown in fig. 1, when the backlight module 20 is in use, the input tube 410 is positioned at the bottom of the case 100, and the output tube 420 is positioned at the top of the case 100. In other words, taking the display of the desktop computer as an example, the display includes a display screen and a base, the display screen is mounted on the base, when the display of the desktop computer is mounted on the computer desk, a side of the display screen, which is close to the base, is the bottom of the backlight module 20, that is, the bottom of the box 100; the side of the display screen away from the base corresponds to the top of the backlight module 20, i.e. the top of the case 100.
According to the law of thermal expansion and contraction of liquid or gas, after the temperature of the cooling medium 450 is increased, the volume is increased, the density is reduced, the molecules of the cooling medium 450 with high temperature move upwards, the density of the cooling medium 450 with low temperature is high, and convection is formed by downward movement, so that the cooling medium 450 can float on the cooling medium 450 with low temperature after being heated. Therefore, the output pipe 420 is provided at the top of the case 100, so that the heated cooling medium 450 can be discharged, and the unheated cooling medium 450 is left in the immersion chamber 500, thereby ensuring the heat dissipation effect.
Further, the input pipe 410 and the output pipe 420 are respectively located at two opposite corners of the case 100. The backlight module 20 or the display device 10 is illustrated in a state when in use, and the backlight module 20 and the case 100 are vertically disposed and face the user, the input tube 410 is positioned at the lower left corner of the case 100, and the output tube 420 is positioned at the upper right corner of the case 100; alternatively, the input pipe 410 is located at the lower right corner of the case 100, and the output pipe 420 is located at the upper left corner of the case 100. By such arrangement, the cooling medium 450 needs to undergo both longitudinal and transverse flow from the inlet to the outlet, which can remove more heat from the area, and thus improves the utilization of the cooling medium 450. Meanwhile, the problem that the cooling medium 450 is directly discharged from the output pipe 420 under the condition of not heating up due to inertial force after entering the immersion cavity 500 from the input pipe 410 and the cooling medium 450 are caused to be poor in heat dissipation effect due to the fact that the input pipe 410 and the output pipe 420 are arranged on the same vertical line is avoided.
Referring to fig. 2 and fig. 5, the mounting position 210 has an annular structure, and the cross section of the mounting position is in a step shape, i.e. the top of the mounting position 210 is provided with a rectangular notch; the edge of the light panel 300 has an inverted step structure, which can be regarded as a rectangular notch formed at the bottom of the edge of the light panel 300, and can be also understood as that the bottom of the edge of the light panel 300 is higher than the bottom of the central area of the edge.
At this time, the bottom of the edge of the light panel 300 is attached to the step surface of the mounting position 210, and the bottom of the central area of the edge is flush with the bottom of the bracket of the light panel 300; the lamp panel 300 and the mounting position 210 are adhered and fixed by a waterproof tape 600. Specifically, the vertical surface of the edge of the lamp panel 300 is adhered to the vertical surface of the mounting position 210 by the waterproof adhesive tape 600, the horizontal surface of the edge of the lamp panel 300 is adhered to the horizontal surface of the mounting position 210 by the waterproof adhesive tape 600, and the gap between the lamp panel 300 and the splicing bracket 200 is also adhered by the waterproof adhesive tape 600, so that the cooling medium 450 immersed in the cavity 500 is prevented from flowing out through the gap between the lamp panel 300 and the splicing bracket 200. The edge of the mounting position 210 and the edge of the lamp panel 300 are matched with each other in a stepped shape, so that the lamp panel 300 can be conveniently supported, the stability of the lamp panel 300 is improved, the bonding surface between the mounting position 210 and the lamp panel 300 can be increased, and the waterproof and air-proof effects are improved.
Moreover, the bottom of the lamp plate 300 is further coated with a waterproof coating, so that the cooling medium 450 remains in the immersion cavity 500 for a long time after the backlight module 20 is used for a long time, and the lamp plate 300 is soaked by the cooling medium 450 for a long time, so that the cooling medium 450 permeates out of the lamp plate 300, and the circuit and the light emitting effect of the backlight module 20 are prevented from being affected.
As shown in fig. 2, the side of the case 100 is in a stepped structure, and specifically, the case 100 includes a bottom plate 110, a first side plate 120, a support plate 130, and a second side plate 140, where the bottom plate 110 is located at the bottom of the light plate 300 and is disposed opposite to the light plate 300; the first side plate 120 is vertically connected to the edge of the bottom plate 110, is disposed around the bottom plate 110, and extends toward the direction of the lamp panel 300; the support plate 130 has a ring-shaped or square structure, is connected to one end of the first side plate 120 away from the bottom plate 110, is parallel to the bottom plate 110, and extends along a direction away from the bottom plate 110; the edge of the splicing bracket 200 is adhered and fixed to the supporting plate 130 by a waterproof tape 600; the second side plate 140 has a ring-shaped or square structure, is connected to one end of the support plate 130 away from the first side plate 120, is perpendicular to the first side plate 120, and extends in a direction away from the bottom plate 110; the bottom plate 110, the first side plate 120, the bottom of the splice holder 200, and the bottoms of the plurality of lamp panels 300 form a closed immersion cavity 500.
Compared with the design that the side surface of the back surface shell or the back plate in the backlight module 20 is linear, in the embodiment of the application, the side surface of the box body 100 at the back surface in the backlight module 20 is made into a step shape, the immersion cavity 500 is firstly controlled to be just under the lamp panel 300, the cooling medium 450 only submerges the bottom of the lamp panel 300, and all the splicing brackets 200 do not need to be contacted at the same time, so that the immersion cavity 500 does not need to be too large, the use amount of the cooling medium 450 is reduced, and the cost is reduced. Second, the support plate 130 of the case 100 can effectively support the edge of the splice holder 200, and also adhere by the waterproof tape 600 to improve waterproof, air-proof effects and stability.
As shown in fig. 3, 6 and 7, a plurality of support columns 220 are disposed at the bottom of the splicing bracket 200, threaded holes are disposed in the support columns 220, a plurality of through holes 111 corresponding to the threaded holes one by one are disposed on the bottom plate 110, the support columns 220 are abutted to the bottom plate 110, and the bottom plate 110 is fixed to the support columns 220 by the cooperation of screws with the through holes 111 and the threaded holes. Alternatively, the support column 220 is not provided with a threaded hole, the bottom plate 110 is not provided with a through hole 111, and the bottom of the support column 220 is directly adhered and fixed on the bottom plate 110 of the box 100 by adopting an adhesion mode.
By additionally arranging the support columns 220 at the bottom of the splicing bracket 200, firstly, each region of the splicing bracket 200 is supported, although the edge of the splicing bracket 200 can be supported by the support plate 130 of the box body 100, the middle of the splicing bracket 200 is easily recessed towards the bottom plate 110 of the box body 100 due to the gravity of the splicing bracket 200 and the lamp plates 300, so that the risk of fracture of the splicing bracket 200 is caused, the distribution of the cooling medium 450 is influenced, and the heat dissipation is uneven; particularly large commercial display devices, and Mini LED display devices, result in greater load bearing capacity of the splice holder 200 and are more prone to these problems. Therefore, the support column 220 is additionally arranged at the bottom of the splicing bracket 200, so that the support column 220 is abutted to the bottom plate 110 of the box body 100, the splicing bracket 200 can be prevented from being deformed, and a uniform heat dissipation effect can be ensured.
The second support column 220 is further fixed to the bottom plate 110 of the case 100, so as to further improve stability of the splice bracket 200 and prevent the splice bracket 200 from shaking in the backlight module 20.
Wherein, each mounting position 210 is correspondingly provided with a supporting column 220, and the supporting column 220 can be correspondingly arranged at the vertex angle of each mounting position 210 and the middle position of each side of each mounting position 210. Because the installation position 210 in the splice bracket 200 mainly bears the weight of the lamp panel 300, the arrangement design ensures that the supporting effect of the splice bracket 200 is uniform everywhere, and the stability of the splice bracket 200 is further improved.
The outer side of the bottom of the support column 220 is provided with an annular incision, the transverse surface and the longitudinal surface at the incision are attached to the corresponding bottom plate 110 at the via hole 111, and a waterproof gasket 700 is further arranged at the attachment position, so that the waterproof and air-proof effects are ensured while the support is carried out, and water leakage or air leakage at the bottom of the box body 100 is avoided.
As shown in fig. 4, 6 and 7, a wiring channel 310 extending towards the bottom plate 110 is provided at the bottom of each lamp panel 300, and the wiring channel 310 is hollow and integrally formed with the lamp panel 300; the base plate 110 is provided with a plurality of wire holes 112, the wire holes 112 are correspondingly matched with the wire channels 310 one by one, and the joint of the wire holes 112 and the wire channels 310 is sealed by a waterproof gasket 700; the wires communicating with the light beads on the light panel 300 extend to the side of the bottom plate 110 away from the light panel 300 through the wire channels 310 and the wire holes 112.
Also, the waterproof and air-proof effects are also considered under the condition that the wiring of the lamp panel 300 is not affected; moreover, after the wiring channel 310 is matched with the bottom plate 110, the lamp panel 300 can be supported, which is beneficial to reducing the pressure of the lamp panel 300 on the splicing bracket 200. In addition, the routing channel 310 is formed integrally with the lamp panel 300, so that heat on the lamp beads can be conducted, and the routing channel 310 has a larger contact area with the cooling medium 450 in the immersion cavity 500, so that the heat dissipation effect can be further improved.
As shown In fig. 8, the present application further discloses a display device 10, where the display device 10 includes a display panel 30 and the backlight module 20 In the foregoing embodiment, and the display panel 30 may be a TN (Twisted Nematic) display panel, an IPS (In-Plane Switching) display panel, a VA (Vertical Alignment) display panel, an MVA (Multi-Domain Vertical Alignment) display panel, which are not limited herein.
The middle frame 50 in the backlight module 20 is in a zigzag structure and comprises a bottom frame 51 and a top frame 52 which are arranged in parallel, wherein the top frame 52 is fixed on the box body 100, the bottom frame 51 is in pressure connection with the splicing bracket 200, the optical film 40 in the backlight module 20 is fixed on the bottom frame 51, the display panel 30 is fixed on the top frame 52, and the optical film 40 is positioned between the display panel 30 and the lamp panel 300.
In addition, the inventive concept of the present application may form a very large number of embodiments, but the application documents are limited in size and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.
Claims (8)
1. The utility model provides a backlight unit which characterized in that, backlight unit includes:
a case;
the splicing bracket is fixed on the box body and is provided with a plurality of hollowed-out mounting positions;
the lamp panels are fixedly arranged in one-to-one correspondence with the mounting positions, the bottoms of the lamp panels leak out of the hollowed-out areas of the mounting positions, and a closed immersing cavity is formed among the bottoms of the lamp panels, the bottoms of the splicing brackets and the box body; and
the cooling medium comprises water, the cooling medium is filled in the immersion cavity, the input pipe and the output pipe are respectively arranged on the box body and are communicated with the immersion cavity, the output pipe, the cooling unit, the pump and the input pipe are sequentially connected, and the cooling unit cools the cooling medium flowing out of the output pipe; the pump controls the cooling medium in the immersion cavity to flow out of the output pipe, and after being cooled by the cooling unit, the cooling medium flows back into the immersion cavity from the input pipe;
the box body comprises a bottom plate, a first side plate, a supporting plate and a second side plate, wherein the bottom plate is positioned at the bottom of the lamp panel and is arranged opposite to the lamp panel; the first side plate is vertically connected with the edge of the bottom plate, is arranged around the bottom plate and extends towards the direction of the lamp panel;
the support plate is of an annular or square structure, is connected with one end of the first side plate, which is far away from the bottom plate, is arranged in parallel with the bottom plate, and extends along the direction far away from the bottom plate; the edge of the splicing bracket is fixedly bonded with the supporting plate through a waterproof adhesive tape; the second side plate is of an annular or square structure, is connected with one end of the supporting plate, which is far away from the first side plate, and extends towards the direction far away from the bottom plate;
the bottom plate, the first side plate, the bottoms of the splicing brackets and the bottoms of the plurality of lamp panels form a closed immersion cavity;
the bottom of each lamp panel is provided with a wiring channel extending towards the direction of the bottom plate, and the wiring channel is hollow and integrally formed with the lamp panel;
the bottom plate is provided with a plurality of wiring holes, the wiring holes are matched with the wiring channels in a one-to-one correspondence manner, and the joint of the wiring holes and the wiring channels is sealed through a waterproof gasket;
the wiring communicated with the lamp beads on the lamp panel extends to one side, far away from the lamp panel, of the bottom plate through the wiring channel and the wiring hole.
2. The backlight module according to claim 1, wherein the mounting position is of a ring-shaped structure, the cross section of the mounting position is of a step shape, the edge bottom of the lamp panel is higher than the bottom of the central area of the lamp panel, the edge bottom of the lamp panel is attached to the step surface of the mounting position, and the bottom of the central area of the lamp panel is level with the bottom of the lamp panel bracket; the lamp panel and the installation position are fixed by bonding through waterproof adhesive tapes.
3. The backlight module according to claim 1, wherein a plurality of support columns are arranged at the bottom of the splicing support, threaded holes are formed in the support columns, a plurality of through holes corresponding to the threaded holes one by one are formed in the bottom plate, the support columns are abutted to the bottom plate, and the bottom plate is fixed with the support columns through the cooperation of screws, the through holes and the threaded holes.
4. A backlight module according to claim 3, wherein the support columns are disposed corresponding to the top corners of each of the mounting locations and corresponding to the middle positions of each side of each of the mounting locations.
5. The backlight module of claim 1, wherein the input tube is positioned at a bottom of the housing and the output tube is positioned at a top of the housing when the backlight module is in use.
6. The backlight module according to claim 5, wherein the input tube and the output tube are respectively positioned at two opposite corners of the case.
7. The backlight module of claim 1, wherein the bottom of the lamp panel is coated with a waterproof coating.
8. A display device comprising a display panel and a backlight module according to any one of claims 1-7, the display panel being fixed to the backlight module, the backlight module providing backlight for the display panel.
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| CN202210900779.7A CN115209705B (en) | 2022-07-28 | 2022-07-28 | Backlight module and display device |
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| CN202210900779.7A CN115209705B (en) | 2022-07-28 | 2022-07-28 | Backlight module and display device |
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| CN115209705B true CN115209705B (en) | 2023-06-16 |
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| CN114333627A (en) * | 2021-12-31 | 2022-04-12 | 惠科股份有限公司 | Backlight module and display device |
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| CN202253402U (en) * | 2011-09-15 | 2012-05-30 | 深圳市华星光电技术有限公司 | Composite type backlight plate, backlight module and liquid crystal display |
| CN205350903U (en) * | 2016-02-17 | 2016-06-29 | 北京若水求实科技有限公司 | Strengthen radiating liquid cooling type LED lamps and lanterns module |
| CN110133914B (en) * | 2019-05-29 | 2021-12-03 | 深圳市华星光电半导体显示技术有限公司 | Backlight structure, manufacturing method thereof and display device |
| CN110570781A (en) * | 2019-09-29 | 2019-12-13 | 广东德豪锐拓显示技术有限公司 | LED display module and LED splicing display system |
| CN111735034A (en) * | 2020-06-22 | 2020-10-02 | 杨文玮 | LED circuit board with heat dissipation structure |
| CN216697683U (en) * | 2021-12-28 | 2022-06-07 | 绵阳惠科光电科技有限公司 | Backlight module and display device |
| CN114265243B (en) * | 2022-03-02 | 2022-07-12 | 惠科股份有限公司 | Backlight module and display device |
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