CN115202103A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN115202103A CN115202103A CN202210806371.3A CN202210806371A CN115202103A CN 115202103 A CN115202103 A CN 115202103A CN 202210806371 A CN202210806371 A CN 202210806371A CN 115202103 A CN115202103 A CN 115202103A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 55
- 230000017525 heat dissipation Effects 0.000 claims description 24
- 238000009423 ventilation Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000005728 strengthening Methods 0.000 abstract description 46
- 230000001771 impaired effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 12
- 239000002390 adhesive tape Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 239000012788 optical film Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
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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
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a backlight module and a liquid crystal display device; this backlight unit includes lamp plate and backplate, and the backplate sets up in lamp plate one side, and wherein, the backplate includes the strengthening rib, has the clearance between strengthening rib and the lamp plate, and backlight unit still includes fan, louvre and scavenge port, and the scavenge port sets up in the strengthening rib and hinders, and the louvre sets up on the strengthening rib, and the fan sets up in one side that the backplate was kept away from to the louvre. This application is through setting up the fan on backlight unit, louvre and scavenge port, and make there is the clearance between strengthening rib and the lamp plate, then at backlight unit during operation, can be through opening the fan, the hot-air between strengthening rib and the lamp plate passes through the louvre effluvium, and the external air can get into to the clearance between strengthening rib and the lamp plate through the scavenge port, thereby the temperature in the clearance between lamp plate and the strengthening rib has been reduced and is located lamp plate and strengthening rib, it is impaired to avoid backlight unit's high temperature to lead to the diaphragm, make liquid crystal display device can normally show.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a liquid crystal display device.
Background
Liquid crystal display devices are widely used due to their low power consumption, high definition, long life, small size, light weight, and the like. With the development of display technology, high brightness is required for the existing display device, so that the power of a lamp panel in the liquid crystal display device can be increased to improve the display brightness. However, the temperature of the lamp panel can be increased along with the power of the lamp panel, and in order to solve the problem that the temperature of the lamp panel is high, the conventional liquid crystal display device can be attached to the lamp panel and the backboard by arranging the heat-conducting double-sided adhesive tape under the lamp panel. However, the heat conduction effect of the heat conduction double-sided adhesive tape is poor, so that the temperature of the liquid crystal display device is high, and the membrane in the liquid crystal display device is damaged to cause poor display.
Therefore, the existing liquid crystal display device has the technical problem that the membrane is damaged due to poor heat dissipation effect of the heat-conducting double-sided adhesive tape.
Disclosure of Invention
The embodiment of the application provides a backlight module and a liquid crystal display device, which are used for relieving the technical problem that the prior liquid crystal display device has poor heat dissipation effect of a heat-conducting double-sided adhesive tape, so that a membrane is damaged.
The embodiment of the application provides a backlight unit, this backlight unit includes:
a lamp panel;
the back plate is arranged on one side of the lamp panel;
the backlight module comprises a back plate, a lamp panel and a fan, wherein the back plate comprises a reinforcing rib, a gap exists between the reinforcing rib and the lamp panel, the backlight module further comprises the fan, heat dissipation holes and ventilation holes, the ventilation holes are formed in the reinforcing rib, the heat dissipation holes are formed in the reinforcing rib, and the fan is arranged on one side, away from the heat dissipation holes, of the back plate.
In some embodiments, the back plate is provided with a fixed terminal, and the fan is fixed on the fixed terminal; or a first connecting hole is formed in the back plate, a second connecting hole is formed in the fan, the first connecting hole and the second connecting hole are correspondingly arranged, and a first connecting terminal is arranged in the first connecting hole and the second connecting hole.
In some embodiments, the backlight module further comprises a constant current plate and a power line, one end of the power line is connected to the constant current plate, and the other end of the power line is connected to the fan.
In some embodiments, a third connection hole is formed in the back plate, a fourth connection hole is formed in the constant current plate, the third connection hole and the fourth connection hole are correspondingly formed, and a second connection terminal is arranged in the third connection hole and the fourth connection hole.
In some embodiments, the backlight module comprises fans arranged in an array, and the fans are arranged on one side close to the constant current plate.
In some embodiments, the heat dissipation holes are disposed corresponding to the gaps, and at least a projection of at least a portion of the heat dissipation holes on the lamp panel is located within a projection of the fan on the lamp panel.
In some embodiments, there is a distance between the projection of the ventilation holes on the lamp panel and the projection of the fan on the lamp panel, and the ventilation holes are arranged around the fan.
In some embodiments, a fifth connecting hole is formed in the back plate, a sixth connecting hole is formed in the lamp panel, the fifth connecting hole and the sixth connecting hole are correspondingly formed, and a third connecting terminal is arranged in the fifth connecting hole and the sixth connecting hole.
In some embodiments, the backboard is provided with a positioning terminal, the positioning terminal is arranged between the lamp panel and the backboard, and the positioning terminal is in contact with the lamp panel.
Meanwhile, the embodiment of the application provides a liquid crystal display device, which comprises a liquid crystal display panel and the backlight module according to any one of the embodiments.
Has the beneficial effects that: the application provides a backlight module and a liquid crystal display device; this backlight unit includes lamp plate and backplate, and the backplate sets up in lamp plate one side, and wherein, the backplate includes the strengthening rib, has the clearance between strengthening rib and the lamp plate, and backlight unit still includes fan, louvre and draught hole, and the draught hole sets up in the strengthening rib hurts, and the louvre sets up on the strengthening rib, and the fan sets up in the one side that the backplate was kept away from to the louvre. This application is through setting up the fan on backlight unit, louvre and scavenge port, and make there is the clearance between strengthening rib and the lamp plate, then at backlight unit during operation, can be through opening the fan, the hot-air between strengthening rib and the lamp plate passes through the louvre effluvium, and the external air can get into to the clearance between strengthening rib and the lamp plate through the scavenge port, thereby the temperature in the clearance between lamp plate and the strengthening rib has been reduced and is located lamp plate and strengthening rib, it is impaired to avoid backlight unit's high temperature to lead to the diaphragm, make liquid crystal display device can normally show.
Drawings
The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic diagram of a conventional liquid crystal display device.
FIG. 2 is a schematic view of a backlight module of a conventional LCD device.
Fig. 3 is a first schematic view of a backlight module according to an embodiment of the present disclosure.
Fig. 4 is a second schematic view of a backlight module according to an embodiment of the disclosure.
Fig. 5 is a third schematic view of a backlight module according to an embodiment of the disclosure.
Fig. 6 is a schematic view of a liquid crystal display device according to an embodiment of the present application.
Fig. 7 is a graph of thermal simulation data of a conventional liquid crystal display device without a double-sided thermal adhesive tape.
Fig. 8 is a graph of thermal simulation data of a conventional liquid crystal display device provided with a double-sided adhesive tape.
Fig. 9 is a schematic thermal simulation diagram of a liquid crystal display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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 application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
As shown in fig. 1 and 2, the conventional liquid crystal display device includes a back plate 11, a lamp panel 13, an inner adhesive frame 14, a diffuser plate 15, an optical film 16, a liquid crystal display panel 17, an outer adhesive frame 18, and a front frame 19, and in order to solve the problem of high temperature of the lamp panel, a double-sided thermal adhesive 12 is disposed between the back plate 11 and the lamp panel 13, so that the lamp panel 13 and the back plate 11 are bonded by the double-sided thermal adhesive 12, and heat of the lamp panel is dissipated by the double-sided thermal adhesive 12. However, the temperature of the liquid crystal display device is high due to poor heat dissipation effect of the heat-conducting double-sided adhesive tape, and the diffusion sheet and the optical film are easily affected by temperature to cause oxidation yellowing and deformation, so that display is affected; and the lamp plate adopts heat conduction double faced adhesive tape fixed, and the equipment degree of difficulty is higher, disassembles the maintenance difficulty. Therefore, the existing liquid crystal display device has the technical problem that the membrane is damaged due to poor heat dissipation effect of the heat-conducting double-sided adhesive tape.
The embodiment of the application provides a backlight module and a liquid crystal display device aiming at the technical problems, so as to alleviate the technical problems.
As shown in fig. 3 to 5, an embodiment of the present application provides a backlight module, including:
a lamp panel 22;
the back plate 21 is arranged on one side of the lamp panel 22;
wherein, backplate 21 includes strengthening rib 37, strengthening rib 37 with there is the clearance between the lamp plate 22, backlight unit still includes fan 31, louvre 33 and scavenge port 32, scavenge port 32 set up in on the strengthening rib 37, louvre 33 set up in on the strengthening rib 37, fan 31 set up in louvre 33 keeps away from one side of backplate 21.
The embodiment of the application provides a backlight unit, this backlight unit is through setting up the fan, louvre and scavenge port, and make to have the clearance between strengthening rib and the lamp plate, then at backlight unit during operation, can be through opening the fan, pass through the louvre with the hot-air between strengthening rib and the lamp plate and spill, and the external air can get into through the scavenge port to the clearance between strengthening rib and the lamp plate, thereby the temperature in the clearance between lamp plate and the strengthening rib has been reduced to the lamp plate, it leads to the diaphragm impaired to avoid backlight unit's high temperature, make liquid crystal display device can normally show.
It should be noted that fig. 5 is a perspective view of the backlight module provided in the embodiment of the present disclosure, and the viewing angle is bottom, for example, in fig. 5, the fan 31 and the heat dissipation hole 33 are located on different planes, and the fan 31 is located on the heat dissipation hole 33, and in fig. 3 and fig. 4, the viewing angle is front view, so the fan 31 is located below the heat dissipation hole 33.
As shown in fig. 4, fig. 5, there is the clearance between this application embodiment through making backplate 21 and lamp plate 22, through form the draught hole 32 on the strengthening rib, louvre 33, and set up fan 31 in backlight unit, then open at lamp plate 22 when generating heat, lamp plate 22's heat can distribute to the clearance between backplate 21 and the lamp plate 22, and this application embodiment opens the back through fan 31, pass through the louvre 33 with the hot air in the clearance and spill, and according to the heat conduction principle, the hot air conduction in the draught hole can be followed to the cold air, convection through cold air and hot air, thereby the temperature of the air in the clearance has been reduced, the heat of corresponding lamp plate can be conducted out, the temperature of lamp plate and the clearance that is located between lamp plate and the strengthening rib has been reduced.
Specifically, as shown in fig. 4, reference numeral 311 represents the conduction direction of cold air, and reference numeral 312 represents the conduction direction of hot air, through cold air of fan replacement and hot air, can see that the cold air can the hot air conduction, makes hot air conduction outside after, and the cold air gets into the clearance between lamp plate and the backplate to air and lamp plate and the backplate between lamp plate and the backplate cool down, thereby make backlight unit's temperature reduce.
In one embodiment, the back plate is provided with a fixed terminal, and the fan is fixed on the fixed terminal; or a first connecting hole is formed in the back plate, a second connecting hole is formed in the fan, the first connecting hole and the second connecting hole are correspondingly arranged, and a first connecting terminal is arranged in the first connecting hole and the second connecting hole.
This application embodiment is through setting up fixed terminal on the backplate, makes the fan fix on fixed terminal, then the fan can combine together with the backplate, dispels the heat to backlight unit, compare in the fan design that adopts independent setting, backlight unit's thickness can be reduced to this application, and fan and backlight unit's distance is less, and the replacement effect of air in to the clearance through draught hole and thermovent is better, compares in the design that sets up the fan alone and can further reduce backlight unit's temperature.
This application embodiment is through setting up first connecting hole on the backplate, set up the second connecting hole on the fan to set up first connecting terminal in first connecting hole and second connecting hole, make first connecting terminal can be connected fan and backplate, dispel the heat to backlight unit through the fan. And the fan is movably connected with the back plate, so that the fan is convenient to disassemble and maintain.
Specifically, when the fan and the back plate are connected through the first connection terminal, the first connection terminal may be a combination of a screw, a screw and a nut.
It should be noted that, in the embodiments of the present application, the first connection terminal is specifically described as an example, and components and materials of the second connection terminal and the third connection terminal in the following embodiments may also be the same as those of the first connection terminal, which are not described again in the following embodiments.
In one embodiment, as shown in fig. 5, the backlight module further includes a constant current plate 35 and a power line 34, one end of the power line 34 is connected to the constant current plate 35, and the other end of the power line 34 is connected to the fan 31. The constant current board is arranged on the backlight module, so that the constant current board can receive signals of a power supply, and the signals of the power supply are conducted to the fan to drive the fan.
Specifically, the constant current board is provided with a binding terminal, the constant current board is connected with the fan, for example, the 220 volt voltage is used, the power supply can convert the 220 volt voltage into a 24 volt voltage and send the 24 volt voltage to the constant current board, the constant current board is connected with the power line through the binding terminal, and the constant current board converts the 24 volt voltage into a 12 volt voltage and transmits the 12 volt voltage to the fan through the power line to drive the fan.
In one embodiment, a third connection hole is formed in the back plate, a fourth connection hole is formed in the constant current plate, the third connection hole and the fourth connection hole are correspondingly formed, and a second connection terminal is arranged in the third connection hole and the fourth connection hole. The third connecting hole is formed in the back plate, the fourth connecting hole is formed in the constant current plate, the second connecting terminal can penetrate through the third connecting hole and the fourth connecting hole to connect the constant current plate and the back plate, and the constant current plate can be fixed. And the constant flow plate is movably connected with the back plate, so that the constant flow plate is convenient to disassemble and maintain.
Specifically, when the constant current board is connected with the backplate, can make the constant current board laminate on the backplate, need not to dig the hole to the backplate, make the intensity of backplate better, avoid backplate intensity to hang down excessively and lead to backlight unit impaired. And in order to avoid the temperature of the constant current plate being transmitted to the back plate, a gap can be formed between the constant current plate and the back plate.
In one embodiment, as shown in fig. 5, the backlight module includes fans 31 arranged in an array, and the fans 31 are disposed at a side close to the constant current plate 35. Through set up a plurality of fans in backlight unit, make fan array set up, then can dispel the heat to each region of lamp plate, avoid the heat too big diaphragm that leads to of heat to be impaired, influence display effect. And the fan is arranged on one side close to the constant current plate, so that the constant current plate can be cooled, the damage of the diaphragm caused by overhigh temperature of the backlight module is avoided, and the liquid crystal display device can normally display.
Specifically, as shown in fig. 5, by setting 5 fans and controlling the fan speed to 2500 rpm, the noise is lower than 35 db, which can meet the requirement.
In an embodiment, as shown in fig. 4 and 5, the heat dissipation holes 33 are disposed corresponding to the gaps, and at least a projection of each of the heat dissipation holes 33 on the lamp panel 22 is located in a projection of the fan 31 on the lamp panel 22. Correspond the clearance through making the louvre and set up, then when replacing the air through the fan, the air in the clearance can be followed the louvre and is effluvized, and simultaneously, the projection of louvre on the lamp plate is located the projection of fan on the lamp plate, then can accelerate the replacement speed of air, improves backlight unit's radiating rate.
In one embodiment, the heat dissipation holes correspond to the gap settings, projections of the heat dissipation holes on the lamp panel are located outside projections of the fan on the lamp panel, intervals between the projections of the heat dissipation holes on the lamp panel and the projections of the fan on the lamp panel are smaller than 20 mm, and a vertical distance between each heat dissipation hole and the corresponding fan is smaller than 4 mm. When the radiating holes are arranged, the radiating holes can be arranged outside the projection area on the lamp panel, the distance between the projection on the lamp panel and the projection on the lamp panel of the fan is smaller than 20 mm, the vertical distance between the radiating holes and the fan is smaller than 4 mm, and the air replacement effect of the fan is better.
In one embodiment, there is a distance between the projection of the ventilation hole on the lamp panel and the projection of the fan on the lamp panel, and the ventilation hole is arranged around the fan. Outside the projection of setting the ventilation hole on the lamp plate on the fan on the lamp plate, make the ventilation hole and lamp plate have the interval, then the scavenger hole entering can be followed to the cold air, avoids hot-air and cold air distance near appearing mixing, leads to the unable clearance conduction to lamp plate and backplate of cold air. And the scavenge port encircles the fan setting, can accelerate the rate of cold air to the clearance conduction between lamp plate and the backplate for backlight unit's radiating rate improves backlight unit's radiating effect.
Specifically, the interval of adjacent scavenge port is greater than 80 millimeters, and through making the interval of adjacent scavenge port be greater than 80 millimeters, avoid the scavenge port to set up too much and lead to the intensity of strengthening rib lower, appear fracture or crooked problem.
Specifically, the diameter range of the vent is 5 millimeters to 12 millimeters, and the diameter through making the vent great for when replacing the air through the fan, accelerate the air replacement speed, accelerate backlight unit's radiating rate, improve backlight unit's radiating effect.
In one embodiment, the width of the gap is greater than or equal to 15 millimeters and the height of the gap is greater than or equal to 3 millimeters. Width through making the clearance is more than or equal to 15 millimeters, and the height in clearance is more than or equal to 3 millimeters for the air volume in the space is great, when replacing the air through the fan, can carry away more heats, accelerates backlight unit's radiating rate, improves backlight unit's radiating effect.
In an embodiment, a fifth connecting hole is formed in the back plate, a sixth connecting hole is formed in the lamp panel, the fifth connecting hole and the sixth connecting hole are correspondingly formed, and a third connecting terminal is arranged in the fifth connecting hole and the sixth connecting hole. Through set up the fifth connecting hole on the backplate, set up the sixth connecting hole on the permanent flow board, make third connecting terminal can pass fifth connecting hole and sixth connecting hole and connect lamp plate and backplate, make the lamp plate can fix. And because lamp plate and backplate swing joint, the maintenance of disassembling of the lamp plate of being convenient for.
In an embodiment, as shown in fig. 4 and 5, a positioning terminal 36 is disposed on the backplane, the positioning terminal 36 is disposed between the lamp panel 22 and the backplane 21, and the positioning terminal 36 contacts with the lamp panel 22. Through setting up the location terminal for the location terminal can support the lamp plate, avoids the lamp plate bending deformation to appear and leads to showing badly, and the location terminal can fix a position, avoids backlight unit's equipment.
In one embodiment, as shown in fig. 3, the backlight module further includes an inner frame 23, an outer frame 24, a diffuser plate 26 and an optical film 25.
Specifically, the material of the back plate comprises a metal material, the material of the lamp panel comprises aluminum, the material of the diffusion plate comprises polystyrene and polycarbonate, the thickness of the diffusion plate is larger than 1.5 mm, and the material of the optical membrane comprises polyethylene terephthalate.
Specifically, the inner rubber frame includes an inclined portion that reflects light, and the diffusion plate and the optical film are disposed on the inner rubber frame.
Meanwhile, the embodiment of the application provides a liquid crystal display device, which comprises a liquid crystal display panel and the backlight module according to any one of the embodiments.
Specifically, as shown in fig. 5 and fig. 6, an embodiment of the present application provides a liquid crystal display device, where the liquid crystal display device includes a backlight module, a liquid crystal display panel 41, and a front frame 42, where the backlight module includes:
a lamp panel 22;
the back plate 21 is arranged on one side of the lamp panel 22;
wherein, backplate 21 includes strengthening rib 37, strengthening rib 37 with there is the clearance between lamp plate 22, backlight unit still includes fan 31, louvre 33 and scavenge port 32, scavenge port 32 set up in on the strengthening rib 37, louvre 33 set up in on the strengthening rib 37, fan 31 set up in louvre 33 keeps away from one side of backplate 21.
The embodiment of the application provides a liquid crystal display device, this liquid crystal display device includes liquid crystal display panel and backlight unit, this backlight unit is through setting up the fan, louvre and scavenge port, and make there is the clearance between strengthening rib and the lamp plate, then at backlight unit during operation, can be through opening the fan, the hot-air with between strengthening rib and the lamp plate passes through the louvre and effuses, and the external air can get into to the clearance between strengthening rib and the lamp plate through the scavenge port, thereby the temperature of lamp plate and the clearance that is located between lamp plate and the strengthening rib has been reduced, it leads to the diaphragm impaired to avoid backlight unit's high temperature, make liquid crystal display device can normally show.
Specifically, as shown in fig. 7 to 9, fig. 7 is a thermal simulation data diagram of a conventional liquid crystal display device without a double-sided thermal tape, fig. 8 is a thermal simulation data diagram of a conventional liquid crystal display device with a double-sided thermal tape, fig. 9 is a thermal simulation schematic diagram of a liquid crystal display device according to an embodiment of the present application, temperature in fig. 7 to 9 represents Temperature, and the unit is celsius, and each area described below represents a Temperature range, for example, the Temperature in fig. 7 ranges from 79.3773 celsius to 80.5967 celsius, as can be seen from fig. 7, the highest point Temperature in the liquid crystal display device is 80.6 celsius, and as can be seen from fig. 8, the highest point Temperature of the liquid crystal display device is 74.5 celsius, and compared with the liquid crystal display device without a double-sided thermal tape, the Temperature drops by 6.1 celsius and the Temperature drops by 7.6%; as can be seen from fig. 9, the maximum temperature of the liquid crystal display device is 71.5 degrees celsius, and compared with a liquid crystal display device without the double-sided thermal conductive adhesive tape, the temperature of the liquid crystal display device is decreased by 9.5 degrees celsius, and the temperature of the liquid crystal display device is decreased by 11.4%, that is, the heat dissipation effect of the liquid crystal display device of the embodiment of the present application is better than that of the current liquid crystal display device.
According to the above embodiments:
the embodiment of the application provides a backlight module and a liquid crystal display device; this backlight unit includes lamp plate and backplate, and the backplate sets up in lamp plate one side, and wherein, the backplate includes the strengthening rib, has the clearance between strengthening rib and the lamp plate, and backlight unit still includes fan, louvre and scavenge port, and the scavenge port sets up in the strengthening rib and hinders, and the louvre sets up on the strengthening rib, and the fan sets up in one side that the backplate was kept away from to the louvre. This application is through setting up the fan on backlight unit, louvre and scavenge port, and make there is the clearance between strengthening rib and the lamp plate, then at backlight unit during operation, can be through opening the fan, the hot-air between strengthening rib and the lamp plate passes through the louvre effluvium, and the external air can get into to the clearance between strengthening rib and the lamp plate through the scavenge port, thereby the temperature in the clearance between lamp plate and the strengthening rib has been reduced and is located lamp plate and strengthening rib, it is impaired to avoid backlight unit's high temperature to lead to the diaphragm, make liquid crystal display device can normally show.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The backlight module and the liquid crystal display device provided by the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the description of the embodiments is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A backlight module, comprising:
a lamp panel;
the back plate is arranged on one side of the lamp panel;
the back plate comprises a reinforcing rib, a gap exists between the reinforcing rib and the lamp plate, the backlight module further comprises a fan, heat dissipation holes and ventilation holes, the ventilation holes are formed in the reinforcing rib, the heat dissipation holes are formed in the reinforcing rib, and the fan is arranged on one side, away from the back plate, of the heat dissipation holes.
2. The backlight module as claimed in claim 1, wherein the back plate has a fixed terminal, and the fan is fixed to the fixed terminal; or a first connecting hole is formed in the back plate, a second connecting hole is formed in the fan, the first connecting hole and the second connecting hole are correspondingly arranged, and a first connecting terminal is arranged in the first connecting hole and the second connecting hole.
3. The backlight module according to claim 1, wherein the backlight module further comprises a constant current board and a power line, one end of the power line is connected to the constant current board, and the other end of the power line is connected to the fan.
4. The backlight module as claimed in claim 3, wherein a third connecting hole is formed in the back plate, a fourth connecting hole is formed in the constant current plate, the third connecting hole and the fourth connecting hole are correspondingly formed, and a second connecting terminal is disposed in the third connecting hole and the fourth connecting hole.
5. The backlight module as claimed in claim 3, wherein the backlight module comprises fans arranged in an array, and the fans are disposed on a side close to the constant current plate.
6. The backlight module according to claim 1, wherein the heat dissipation holes are disposed corresponding to the gaps, and at least a portion of the projections of the heat dissipation holes on the lamp panel are located in the projections of the fans on the lamp panel.
7. The backlight module of claim 1, wherein a distance exists between a projection of the ventilating holes on the lamp panel and a projection of the fan on the lamp panel, and the ventilating holes are disposed around the fan.
8. The backlight module according to claim 1, wherein a fifth connecting hole is formed in the back plate, a sixth connecting hole is formed in the lamp panel, the fifth connecting hole and the sixth connecting hole are correspondingly formed, and third connecting terminals are arranged in the fifth connecting hole and the sixth connecting hole.
9. The backlight module as claimed in claim 8, wherein the back plate is provided with a positioning terminal, the positioning terminal is disposed between the lamp panel and the back plate, and the positioning terminal contacts with the lamp panel.
10. A liquid crystal display device, comprising a liquid crystal display panel and the backlight module of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210806371.3A CN115202103A (en) | 2022-07-08 | 2022-07-08 | Backlight module and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210806371.3A CN115202103A (en) | 2022-07-08 | 2022-07-08 | Backlight module and liquid crystal display device |
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| CN115202103A true CN115202103A (en) | 2022-10-18 |
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| CN202210806371.3A Pending CN115202103A (en) | 2022-07-08 | 2022-07-08 | Backlight module and liquid crystal display device |
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