CN108594521B - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN108594521B CN108594521B CN201810110989.XA CN201810110989A CN108594521B CN 108594521 B CN108594521 B CN 108594521B CN 201810110989 A CN201810110989 A CN 201810110989A CN 108594521 B CN108594521 B CN 108594521B
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- Prior art keywords
- heat insulation
- aluminum extrusion
- assembling
- backlight module
- insulation piece
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 75
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 75
- 238000009413 insulation Methods 0.000 claims abstract description 53
- 238000001125 extrusion Methods 0.000 claims abstract description 50
- 239000004411 aluminium Substances 0.000 claims abstract description 24
- 230000006978 adaptation Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000012212 insulator Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
Images
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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
- G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module, at least comprising: the LED backlight module comprises an LED light source, a light guide plate, a back plate, an aluminum extrusion and a heat insulation piece for isolating heat of the aluminum extrusion from being transferred to the back plate; the heat insulating member is disposed between the aluminum extrusion and the back plate, wherein: the heat insulation member includes: the heat insulation piece comprises a heat insulation piece body and a plurality of assembling bulges convexly arranged on one side surface of the heat insulation piece body; the crowded surface of aluminium is equipped with the assembly position with the protruding looks adaptation of assembly, wherein: the heat insulation part body is provided with a plurality of assembling convex sides and assembled towards the aluminum extrusion, the heat insulation part body and the aluminum extrusion are fastened and connected into a whole through an assembling position and an assembling convex matching position, and a certain gap exists between the heat insulation part body and the aluminum extrusion. The invention also discloses a liquid crystal display device. The backlight module and the liquid crystal display device can prevent heat on the aluminum extrusion from being transferred to the light guide plate and the optical adhesive nearby, so that the problem of uneven brightness generated at the end side position of the screen of the display device is solved.
Description
Technical Field
The invention relates to the field of display panels, in particular to a backlight module and a liquid crystal display device.
Background
At present, an important development trend of LCD televisions or displays is thinning, and one of the most important technical implementation ways of thinning is to use a glass light guide plate as a support structure of a display terminal, and achieve a light and thin effect by attaching a middle frame, an aluminum extrusion and a back plate to the glass light guide plate. For example: the technical scheme that the heat dissipation effect of the backlight module is improved by arranging the temperature equalizing plate on the back surface of the aluminum extrusion in the prior art is that the heat conductivity coefficient of the traditional aluminum material is limited, and heat cannot be effectively conducted to the part of the aluminum extrusion far away from a heat source, so that the heat dissipation efficiency of the aluminum extrusion is low. Through increasing the temperature-uniforming plate, there is phase change material in the temperature-uniforming plate, can be effectively with LED concentrated heat evenly distributed to the temperature-uniforming plate on, then crowded and the great temperature-uniforming plate of area is connected through the aluminium to reduced the crowded temperature gradient of going up of aluminium, more be favorable to the scattered heat generation, that is to say, the structure that traditional structure set up between crowded and the backplate of aluminium is in order to optimize the crowded temperature gradient of heat dissipation aluminium, improves the radiating effect.
However, the above architecture also presents a number of unexpected problems, such as: in the positions near the joint of the back plate, the aluminum extrusion and the light guide plate, because the aluminum extrusion is used as a heat dissipation piece, the temperature of the light guide plate, the back plate and the optical glue among the light guide plate and the back plate at the joint position is higher than that of the light guide plate and the back plate at other positions when the display panel works, and the light guide plate and the optical glue are sensitive to the temperature, so that different shades are generated at the position of the lower part of the liquid crystal screen close to the aluminum extrusion and the upper part of the liquid crystal screen.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device, which can prevent heat on an aluminum extrusion from being transferred to a light guide plate and an optical adhesive nearby the aluminum extrusion, so as to eliminate the problem of uneven brightness generated at the end side position of a display device screen.
In order to solve the above technical problem, the present invention provides a backlight module, at least comprising: the LED backlight module comprises an LED light source, a light guide plate, a back plate, an aluminum extrusion and a heat insulation piece for isolating heat of the aluminum extrusion from being transferred to the back plate, wherein the light guide plate is bonded on the back plate; the heat insulating member is disposed between the aluminum extrusion and the back plate, wherein: the heat insulation member includes: the heat insulation piece comprises a heat insulation piece body and a plurality of assembling bulges convexly arranged on the surface of one side of the heat insulation piece body, wherein the assembling bulges are riveting columns uniformly distributed on the surface of one side of the heat insulation piece body; the crowded surface of aluminium is equipped with the assembly position with the protruding looks adaptation of assembly, wherein: one side of the heat insulation piece body provided with the plurality of assembling bulges is assembled towards the aluminum extrusion, the heat insulation piece body and the aluminum extrusion are fastened and connected into a whole through assembling positions and the assembling bulges, a certain gap is formed between the heat insulation piece body and the aluminum extrusion, and the other side of the heat insulation piece body, which is opposite to the side provided with the plurality of assembling bulges, is adhered to the back plate; the aluminum extrusion comprises the following steps: a vertical plate for assembling on one side of the heat insulation element body provided with a plurality of assembling protrusions; the tip vertical extension from the riser and the diaphragm of establishing, wherein: the assembling position is a plurality of screw holes arranged on the vertical plate, and screws pass through the screw holes and are locked in the assembling protrusions to fasten the vertical plate on the heat insulation part body.
Wherein, be equipped with a plurality of ventilation holes on the diaphragm, the air gets into the clearance between crowded and the heat insulating board of aluminium through a plurality of ventilation holes.
The LED light source is an LED light bar and is arranged on the extruded aluminum transverse plate.
Wherein the thermal insulation is made of a material having a low thermal conductivity.
In order to solve the technical problem, the invention also discloses a liquid crystal display device with the backlight module.
The backlight module and the liquid crystal display device provided by the invention have the following beneficial effects: the heat insulation member includes: the heat insulation piece comprises a heat insulation piece body and a plurality of assembling bulges convexly arranged on one side surface of the heat insulation piece body; the crowded surface of aluminium is equipped with the assembly position with the protruding looks adaptation of assembly, wherein: the heat insulating part body sets up the crowded assembly of protruding one side orientation aluminium of a plurality of assemblies, and the heat insulating part body is even as an organic whole with the crowded adaptation fastening of aluminium through the assembly position with the assembly arch, has certain space between heat insulating part body and the aluminium is crowded, and it can separate the crowded heat transfer of going up of aluminium and be glued its near light guide plate and optics to the problem that the light and shade differs that produces of the terminal side position of elimination display device screen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a longitudinal cross section of a backlight module according to the present invention.
FIG. 2 is a schematic view of an aluminum extrusion structure of the backlight module of the present invention.
FIG. 3 is a schematic view of a heat shield of the backlight module of the present invention.
FIG. 4 is a schematic diagram of a transverse cross-section of a backlight module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1-4 show a first embodiment of a backlight module and a liquid crystal display device according to the present invention.
The backlight module in this embodiment at least includes: the LED backlight module comprises an LED light source 1, a light guide plate 2, a back plate 3, an aluminum extrusion 4 and a heat insulation piece 5 for isolating heat of the aluminum extrusion 4 from being transferred to the back plate 3; a thermal insulation 5 is provided between the aluminium extrusion 4 and the backing plate 3, wherein: the heat insulator 5 includes: a heat insulator body 51 and a plurality of fitting projections 52 provided to protrude on one side surface of the heat insulator body 5; the surface of the aluminum extrusion 4 is provided with an assembling position 411 matched with the assembling protrusion 52, wherein: one side of the heat insulation piece body 5 provided with the plurality of assembling protrusions 52 is assembled towards the aluminum extrusion 4, the heat insulation piece body 51 and the aluminum extrusion 4 are fastened and connected into a whole through the assembling positions 411 and the assembling protrusions 52, and a certain gap T exists between the heat insulation piece body 51 and the aluminum extrusion 4.
In specific implementation, the structures and the assembling manners of the LED light source 1, the light guide plate 2 and the back plate 3 are substantially the same as those of the LED light source 1, the light guide plate 2 and the back plate 3 in the prior art. The LED light source in this embodiment is an LED light bar, and the light guide plate 2 is bonded on the back plate 3.
The aluminum extrusion 4 includes: a riser 41 for fitting to the side of the heat insulator body 51 where the plurality of fitting projections 52 are provided; from the tip vertical extension of riser 41 and the diaphragm 42 that establishes, LED lamp strip is installed on the diaphragm of 4 are crowded to the aluminium 42, wherein: the fitting positions 411 are a plurality of screw holes provided in the riser 41.
Further, the heat insulator 5 is a structural member for blocking heat on the aluminum extrusion from transferring to the light guide plate and the optical adhesive in the vicinity thereof, and is assembled between the aluminum extrusion 4 and the back plate 3. In specific implementation, the assembling protrusions 52 are rivet columns uniformly arranged on one side surface of the heat insulation member body 51. The rivet posts are provided at positions corresponding to positions where a plurality of screw holes are provided in the riser 41 so as to fasten the riser 41 to the heat insulator body 51 when the screws are fastened to the fitting projections 52 through the screw holes 411.
Further, the other side opposite to the side of the heat insulator body 51 where the plurality of fitting projections 52 are provided is bonded to the rear plate 3. In this embodiment, the number of the screw holes 411 and the fitting protrusions 52 is limited, and it is preferable that the heat insulating member 5 is made of a material having a low thermal conductivity, which has a good strength. Thus, the heat on the aluminum extrusion 4 cannot be transferred to the back plate 3 in a large amount, and also cannot be transferred to the reflective sheet, the optical cement and the light guide plate on one side of the back plate 3, so that the uneven brightness at the end of the backlight module cannot be generated.
Preferably, the horizontal plate 42 is provided with a plurality of vent holes 421, which are square holes in the embodiment and function as: the air can get into the space T between 4 crowded and the heat insulating board 5 of aluminium through these square holes, and the tow sides of 4 crowded of aluminium can both contact with the air, compare in traditional structure, and the heat transfer area who is equivalent to 4 crowded and air of aluminium has increased one time, has strengthened 4 crowded radiating effect of aluminium greatly.
In the embodiment of the backlight module, the back plate 3 and the light guide plate 2 are mounted in place, and then the heat insulation plate 5 is adhered to the back plate 3. The aluminum extrusion 1 and the heat insulation plate 2 are aligned, one side of the heat insulation piece body 5 provided with the plurality of assembling protrusions 52 is assembled towards the aluminum extrusion 4, and the vertical plate 41 can be fastened on the heat insulation piece body 51 when a screw passes through the screw hole 411 and is locked in the assembling protrusions 52. After the assembly is completed, the gap T is formed between the heat insulation part body 51 and the aluminum extrusion plate 4, and air can enter the gap T between the aluminum extrusion plate 4 and the heat insulation plate 5 through the square hole in the aluminum extrusion transverse plate 42, so that the heat dissipation effect of the aluminum extrusion plate 4 is enhanced, and the reliability of the LED lamp strip is improved.
The embodiment of the invention also discloses a liquid crystal display device with the backlight module, and the specific implementation mode of the liquid crystal display device is the same as that of the backlight module, and the detailed description is omitted here.
The backlight module and the liquid crystal display device provided by the invention have the following beneficial effects: the heat insulation member includes: the heat insulation piece comprises a heat insulation piece body and a plurality of assembling bulges convexly arranged on one side surface of the heat insulation piece body; the crowded surface of aluminium is equipped with the assembly position with the protruding looks adaptation of assembly, wherein: the heat insulating part body sets up the crowded assembly of protruding one side orientation aluminium of a plurality of assemblies, and the heat insulating part body is even as an organic whole with the crowded adaptation fastening of aluminium through the assembly position with the assembly arch, has certain space between heat insulating part body and the aluminium is crowded, and it can separate the crowded heat transfer of going up of aluminium and be glued its near light guide plate and optics to the problem that the light and shade differs that produces of the terminal side position of elimination display device screen.
Claims (5)
1. A backlight module at least comprises: the LED backlight module comprises an LED light source, a light guide plate, a back plate, an aluminum extrusion and a heat insulation piece for isolating heat of the aluminum extrusion from being transferred to the back plate; the light guide plate is bonded on the back plate, and the heat insulation piece is arranged between the aluminum extrusion and the back plate, wherein: the heat shield includes: the heat insulation piece comprises a heat insulation piece body and a plurality of assembling bulges convexly arranged on the surface of one side of the heat insulation piece body, wherein the assembling bulges are riveting columns uniformly distributed on the surface of one side of the heat insulation piece body;
the aluminium extruded surface is equipped with the protruding assembly position of looks adaptation of assembly, wherein:
one side, provided with the plurality of assembling bulges, of the heat insulation piece body is assembled towards the aluminum extrusion, the heat insulation piece body and the aluminum extrusion are fixedly connected into a whole through the assembling position and the assembling bulges in a matched and fastened mode, a certain gap is formed between the heat insulation piece body and the aluminum extrusion, and the other side, opposite to the side, provided with the plurality of assembling bulges, of the heat insulation piece body is bonded on the back plate;
the aluminum extrusion comprises: a vertical plate for being assembled at one side of the heat insulation element body where the plurality of assembling protrusions are arranged; from the tip vertical extension of riser and the diaphragm of establishing, wherein: the assembling positions are a plurality of screw holes formed in the vertical plate, and screws penetrate through the screw holes to be locked in the assembling protrusions to fasten the vertical plate on the heat insulation part body.
2. The backlight module of claim 1, wherein the cross plate has a plurality of vents, and air enters the space between the aluminum extrusion and the thermal shield through the vents.
3. The backlight module as claimed in claim 1, wherein the LED light source is an LED light bar mounted on the cross plate of the aluminum extrusion.
4. The backlight module of claim 1, wherein the heat shield is made of a material having a low thermal conductivity.
5. A liquid crystal display device, characterized in that the liquid crystal display device comprises the backlight module according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110989.XA CN108594521B (en) | 2018-02-05 | 2018-02-05 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110989.XA CN108594521B (en) | 2018-02-05 | 2018-02-05 | Backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN108594521A CN108594521A (en) | 2018-09-28 |
| CN108594521B true CN108594521B (en) | 2021-11-26 |
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| CN201810110989.XA Expired - Fee Related CN108594521B (en) | 2018-02-05 | 2018-02-05 | Backlight module and liquid crystal display device |
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| CN (1) | CN108594521B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346974A (en) * | 2019-07-03 | 2019-10-18 | 江苏科森光电科技有限公司 | A kind of backlight module |
| CN110444111A (en) * | 2019-08-16 | 2019-11-12 | 京东方科技集团股份有限公司 | Backlight module and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101676769A (en) * | 2008-09-18 | 2010-03-24 | 株式会社日立制作所 | Liquid crystal display unit |
| CN102352991A (en) * | 2011-09-28 | 2012-02-15 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) backlight module and liquid crystal display (LCD) device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2484614Y (en) * | 2001-06-01 | 2002-04-03 | 廖骏吉 | Shadow cover structure |
| KR101255545B1 (en) * | 2006-01-24 | 2013-04-16 | 삼성디스플레이 주식회사 | Lamp support unit and backlight assembly and liquid crystal display including the same |
| CN102494276B (en) * | 2011-12-02 | 2013-11-27 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102563459B (en) * | 2011-12-13 | 2014-06-11 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101676769A (en) * | 2008-09-18 | 2010-03-24 | 株式会社日立制作所 | Liquid crystal display unit |
| CN102352991A (en) * | 2011-09-28 | 2012-02-15 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) backlight module and liquid crystal display (LCD) device |
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| CN108594521A (en) | 2018-09-28 |
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