CN207764405U - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN207764405U CN207764405U CN201820232202.2U CN201820232202U CN207764405U CN 207764405 U CN207764405 U CN 207764405U CN 201820232202 U CN201820232202 U CN 201820232202U CN 207764405 U CN207764405 U CN 207764405U
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- guide plate
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Abstract
The utility model discloses a kind of backlight module and liquid crystal display devices, backlight module includes light guide plate and optical diaphragm, side of the light guide plate towards optical diaphragm is provided with coating layer, the refractive index of coating layer is less than the refractive index of light guide plate, and optical diaphragm fits in the side that coating layer deviates from light guide plate entirely.The utility model improves the structure of backlight module, improves the light guide effect of light guide plate.
Description
Technical field
The utility model is related to technical field of liquid crystal display more particularly to a kind of backlight modules and liquid crystal display device.
Background technology
The liquid crystal module of the liquid crystal display devices such as LCD TV, liquid crystal display generally includes backlight module and liquid crystal glass
Glass, wherein backlight module includes center and backboard, and center is fastenedly connected to form vessel with backboard, and light source, anti-is equipped in the vessel
Penetrate piece, light guide plate, optical diaphragm etc..In the prior art, in order to realize the lightening of liquid crystal display device, usually by backlight module
Optical diaphragm fit on light guide plate, to reduce the thickness of backlight module, and then reduce the integral thickness of liquid crystal display device.
But after optical diaphragm and light guide plate fit together, it is easy to the light in light guide plate in light guide plate light-emitting surface
Total reflection damage, to influence the light guide effect of light guide plate.
Utility model content
The main purpose of the utility model is to provide a kind of backlight modules, it is intended to optical diaphragm be avoided to fit in light guide plate
After upper, the light guide effect of light guide plate is impacted.
To achieve the above object, the utility model proposes a kind of backlight module, the backlight module includes light guide plate and light
Diaphragm is learned, side of the light guide plate towards the optical diaphragm is provided with coating layer, and the refractive index of the coating layer is less than institute
The refractive index of light guide plate is stated, the optical diaphragm fits in the side that the coating layer deviates from the light guide plate entirely.
Preferably, the refractive index of the coating layer is less than or equal to 1.52.
Preferably, the backlight module further includes shading piece, and the shading piece coats the non-light incidence side of the light guide plate
Edge.
Preferably, the backlight module further includes blocking item with what the non-light incidence side of the light guide plate was oppositely arranged, described
This grade of item extends along the length direction of the light guide plate incident side, also, the width of the shield item is more than the light guide plate
Thickness.
Preferably, the incident side of the light guide plate is provided with reflecting plate, which is set to the light guide plate direction
Side, and the incidence surface of the light guide plate is stretched out in, so that the incidence surface of the light guide plate and the reflecting plate are enclosed
The side entering type light source in light incidence section domain, the backlight module is located in the light incidence section domain.
Preferably, the both sides of the light guide plate are both provided with the reflecting plate, the side entering type light source include PCB lamp board and
LED light in the PCB lamp board, the LED light is between two reflecting plates.
Preferably, the reflectivity of the reflecting plate is greater than or equal to 95%.
Preferably, the light guide plate is pasted on away from the side of the optical diaphragm on the backboard of the backlight module.
Preferably, the backlight module further includes radiating piece, and the backboard that the radiating piece is set to the backlight module deviates from
The side of the light guide plate, to radiate to the backlight module.
The utility model also proposes a kind of liquid crystal display device, the liquid crystal display device include shell, liquid crystal display panel and
Backlight module as described above, the backlight module include light guide plate and optical diaphragm, and the light guide plate is towards the optical film
The side of piece is provided with coating layer, and the refractive index of the coating layer is less than the refractive index of the light guide plate, and the optical diaphragm is complete
The side that the coating layer deviates from the light guide plate is fitted in, the backlight module and the liquid crystal display panel are mounted on the shell
It is interior, and the liquid crystal display panel is fixedly connected with the light guide plate of the backlight module.
The utility model keeps the refractive index of coating layer small by the way that coating layer is arranged in side of the light guide plate towards optical diaphragm
In the refractive index of optical diaphragm, and optical diaphragm is fitted in side of the coating layer away from light guide plate entirely, to reduce optical film
Gap between piece and light guide plate, and then reduce the integral thickness of backlight module；It is led moreover, because the refractive index of coating layer is less than
The refractive index of tabula rasa, the light that light source projects, being capable of going out in light guide plate after the incidence surface of light guide plate enters in light guide plate
Smooth surface, which is all-trans, is incident upon the lower surface of light guide plate, and is projected from the light-emitting surface of light guide plate after the following table area scattering of light guide plate, to
Keep the light guide effect of light guide plate more preferable.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of the utility model liquid crystal module；
Fig. 2 is that liquid crystal module is in the partial sectional view of light guide plate non-light incidence side in Fig. 1, and the directions A-A carry out along Fig. 1
Section view；
Fig. 3 is the enlarged drawing at A in Fig. 2；
Fig. 4 is partial sectional view of the utility model backlight module in light guide plate incident side.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 10 | Backlight module | 17 | Block item |
| 11 | Backboard | 18 | Double faced adhesive tape |
| 12 | Light guide plate | 19 | Front frame press strip |
| 12a | Incidence surface | 19a | First side plate |
| 13 | Optical diaphragm | 19b | Second side plate |
| 14 | Reflector plate | 20 | Liquid crystal display panel |
| 15 | Light source | 21 | Reflecting plate |
| 15a | PCB lamp board | 22 | Radiating piece |
| 15b | LED light | 22a | Mounting groove |
| 16 | Shading piece | 23 | Coating layer |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making the creative labor premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining relative position relation, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
To indicate or implying its relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not in the requires of the utility model
Protection domain within.
The utility model proposes a kind of liquid crystal display device, which includes shell and in shell
Liquid crystal module.Wherein, liquid crystal display device can be that LCD TV, liquid crystal display etc. are any aobvious with above-mentioned liquid crystal module
Showing device, the present embodiment are not restricted.
Referring to FIG. 1 and FIG. 2, liquid crystal module includes backlight module 10 and liquid crystal display panel 20, and backlight module 10 includes light guide plate
12 and optical diaphragm 13, optical diaphragm 13 fit in the surface of light guide plate 12 to reduce between optical diaphragm 13 and light guide plate 12
Gap, and then reduce the integral thickness of backlight module 10.
After avoiding that directly optical diaphragm 13 and light guide plate 12 fitting together, optical diaphragm 13 is in light guide plate 12
Light is impacted in the reflection of the light-emitting surface of light guide plate 12, and the light guide effect of light guide plate 12 is caused to weaken.In the present embodiment, such as
Shown in Fig. 3, can side of the light guide plate 12 towards optical diaphragm 13 be provided with coating layer 23, also, the folding of the coating layer 23
The refractive index that rate is less than light guide plate 12 is penetrated, optical diaphragm 13 is then fitted in into coating layer 23 away from the one of light guide plate 12 entirely again
Side.The light that light source 15 projects as a result, can be in light guide plate after the incidence surface 12a of light guide plate 12 is entered in light guide plate 12
12 light-emitting surface, which is all-trans, is incident upon the lower surface of light guide plate 12, and from the light extraction of light guide plate 12 after the following table area scattering of light guide plate 12
Face is projected, to keep the light guide effect of light guide plate 12 more preferable.
Wherein, stickup fixation can be carried out by optical cements such as OCA glue, UV glue between optical model sheet 13 and coating layer 23,
The present embodiment is not restricted.
It should be noted that in practical application, which further includes the portions such as backboard 11, reflector plate 14, light source 15
Part, the components such as backboard 11, reflector plate 14, light source 15 can be structure in the prior art, or described below
Structure does not elaborate herein.
In the present embodiment, since the light guide plate 12 of unlike material has different refractive index, in the present embodiment, can make painting
The refractive index of layer of cloth 23 is less than or equal to 1.52, is led with that will not be destroyed when ensureing light guide plate 12 of the coating layer 23 for unlike material
Light reflection in tabula rasa 12.
In a preferred embodiment, the refractive index of coating layer 23 can be made to be greater than or equal to 1.4, and be less than or equal to
1.52, while so that coating layer 23 promotes more notable to the light guide effect of light guide plate 12, reduce the material to coating layer 23
It is required that and then reduce coating layer 23 cost.
In the present embodiment, light guide plate 12 can be made to be pasted on backboard 11, thereby, it is possible to reduce the thickness of center, or
Center directly is saved, to reduce the integral thickness of backlight module 10.
It is understood that when saving center, liquid crystal display panel 20 can be made to deviate from the side of backboard 11 with light guide plate 12
It pastes and fixes, alternatively, liquid crystal display panel 20 is made to be fixedly connected with the shell of liquid crystal display device, thereby, it is possible to reduce liquid crystal display
The integral thickness of device and the width of frame, and the manufacturing cost of backlight module 10 is reduced, improve the assembly of backlight module
Efficiency.
In a preferred embodiment, light guide plate 12 can be made to fit in backboard 11 entirely away from the side of optical diaphragm 13
The integral strength of backlight module 10 to further decrease the thickness of backlight module 10, and is improved in surface.
In the present embodiment, between liquid crystal display panel 20 and light guide plate 12, alternatively, can pass through between light guide plate 12 and backboard 11
The stickups such as double faced adhesive tape 18, glue are fixed.Certainly, it when pasting fixed by double faced adhesive tape 18 between light guide plate 12 and backboard 11, glues
It pastes more convenient, and is not easy to pollute the surface of light guide plate 12 or liquid crystal display panel 20.
In use due to backlight module 10, the active force between light guide plate 12 and backboard 11 be more than light guide plate 12 with
Active force between liquid crystal display panel 20 in the present embodiment, can make the bonding strength between liquid crystal display panel 20 and light guide plate 12, greatly
Bonding strength between light guide plate 12 and backboard 11, to reduce connection liquid crystal display panel 20 and light guide plate 12 double faced adhesive tape 18 or
The tack requirements of glue etc. are meeting the company between light guide plate 12 and backboard 11 and between light guide plate 12 and liquid crystal display panel 20
It connects under the premise of intensity meets the requirements, reduces connection liquid crystal display panel 20 and the double faced adhesive tape 18 of light guide plate 12 or the cost of glue.
In a preferred embodiment, it is that foam is two-sided that can make the double faced adhesive tape 18 of connection liquid crystal display panel 20 and light guide plate 12
Glue, and the double faced adhesive tape 18 between connection light guide plate 12 and backboard 11 is made to be high viscosity double faced adhesive tape, make liquid crystal display panel 20 as a result, and leads
It is lower that cost is connected between tabula rasa 12 and between light guide plate 12 and backboard 11.
In the present embodiment, the material of backboard 11 can be made identical with the material of light guide plate 12, such as：When light guide plate 12 is glass
When glass plate, backboard 11 is also glass plate, and when light guide plate 12 is plastic plate, backboard 11 is also plastic plate, makes light guide plate 12 as a result,
There is similar dilation amount with backboard 11, after the two connects, avoid the two deflection different and lead to degumming layering etc.
Problem.
Wherein, when backboard 11 is made of clear material, as shown in Figure 2, Figure 4 shows, it can coat and hide at the edge of backboard 11
Light part 16 goes out and influences light guide effect and the liquid crystal display of light guide plate 12 to avoid the edge leakage of light from backboard 11
The user experience of device.
It should be noted that the liquid crystal display device in the utility model can be directly-down liquid crystal display device, also may be used
Think side entering type liquid crystal display device, certainly, when the technical solution in the utility model is used for side entering type liquid crystal display device,
With better effect.
On the basis of above-mentioned any one embodiment, as shown in Fig. 2, backlight module 10 can be made to include shading piece 16, it should
Shading piece 16 coats the non-light incidence side edge of light guide plate 12, is leaked out from its non-light incidence side to avoid the light in light guide plate 12,
And the light efficiency of backlight module 10 is caused to reduce.
It should be noted that the part at the non-light incidence side edge of the covering light guide plate 12 of shading piece 16 can be made, it can also
Shading piece 16 is set to cover the non-light incidence side edge of entire light guide plate 12, certainly, when shading piece 16 covers the non-of entire light guide plate 12
When incident side edge, the shaded effect of shading piece 16 is more preferable.
Wherein, shading piece 16 can be depending on the structure of shading piece 16 with the connection type of light guide plate 12, and the present embodiment is not
It is restricted.Such as：Shading piece 16 can be shading glue cloth, then the shading adhesive plaster can be pasted onto to the non-light incidence side of light guide plate 12
Edge, so that the cost of shading piece 16 is relatively low；Alternatively, shading piece 16 can be the elongate configuration of the " U "-shaped setting in cross section, and
The elongate configuration is held on the both sides at the non-light incidence side edge of light guide plate 12, and shading piece 16 and the connection of light guide plate 12 are non-as a result,
It is often convenient；It is, of course, also possible to directly shading coating is coated at the non-light incidence side edge of light guide plate 12 to form shading piece 16, by
This, light guide plate 12 can be pre-processed at supplied materials end, and processing is very convenient, and can carry out automated production.
It is possible to further make surface of the shading piece 16 towards light guide plate 12 be coated with high reflection material, alternatively, directly with high
Shading piece 16 is made in reflecting material, alternatively, directly applying high reflection material set on the non-light incidence side edge of light guide plate 12, so as to hide
Light part 16 can reflect the light for being irradiated to 12 non-light incidence side of light guide plate, to further increase the light of backlight module 10
Effect.
Certainly, as shown in Fig. 2, backlight module 10 can also be made to include being oppositely arranged to block with the non-light incidence side of light guide plate 12
Item 17, this blocks item 17 and extends along the length direction of the non-light incidence side of light guide plate 12, also, the width h for blocking item 17 is more than
The thickness of light guide plate 12.The edge that thereby, it is possible to make to block the non-light incidence side that item 17 blocks light guide plate 12, avoids in light guide plate 12
Light leaked out from its non-light incidence side, and it is a degree of anti-to being carried out from the light of the non-light incidence side of light guide plate 12 injection
It penetrates, to improve the light efficiency of backlight module 10.It can also be between light guide plate 12 and liquid crystal display panel 20 in addition, blocking item 17
Gap influences backlight module 10 alternatively, the gap between light guide plate 12 and backboard 11 is blocked to prevent dust from entering
Service life.Furthermore between liquid crystal display panel 20 and light guide plate 12, alternatively, passing through double faced adhesive tape between light guide plate 12 and backboard 11
18 when being pasted, and double faced adhesive tape 18 can also be blocked by blocking item 17, so that backlight module 10 has better appearance.
In the present embodiment, blocking item 17 can in several ways be installed on backlight module 10, and the present embodiment does not limit
System.Such as：It can make to block a side surface of the item 17 towards backboard 11 and be fixedly connected with backboard 11；Alternatively, making to block 17 face of item
It is fixedly connected to a side surface of liquid crystal display panel 20 with liquid crystal display panel 20；Can also between liquid crystal display panel 20 and light guide plate 12,
Alternatively, when being pasted by double faced adhesive tape 18 between light guide plate 12 and backboard 11, item 17 will be blocked and be fixedly connected with double faced adhesive tape 18.
It should be noted that backlight module 10 can only include shading piece 16 and block one kind in item 17, it can also be same
When include shading piece 16 and blocking item 17, certainly, when backlight module 10 is simultaneously including shading piece 16 and when blocking item 17, Neng Gougeng
The good light avoided in light guide plate 12 is leaked out from its non-light incidence side, and backlight module is made to have better appearance.
As shown in figure 4, the incident side of light guide plate 12 has incidence surface 12a, light source 15 and the light guide plate 12 of backlight module 10
Incidence surface 12a be oppositely arranged, due to light source 15 light emitting angle be 120 ° or so, wide-angle outgoing light can not irradiate
Into on the incidence surface 12a of light guide plate 12, cause the luminous energy that light source 15 is launched that can not be fully utilized as a result,.
To solve the above problems, be side entering type liquid crystal display device in liquid crystal display device, it can entering in light guide plate 12
Reflecting plate 21 is arranged in light side, which is set to the side surface of 12 thickness direction of light guide plate, and stretches out in entering for light guide plate 12
Smooth surface 12a so that reflecting plate 21 and the incidence surface 12a of light guide plate 12 are enclosed light incidence section domain, and makes light source 15 enter positioned at this
In light region, the light of its wide-angle of light source 15 outgoing can be reflexed to by reflecting plate 21 in light guide plate 12 as a result, to improve light source
15 light utilization.It should be noted that when liquid crystal display device is side entering type liquid crystal display device, light source 15 enters for side
Formula light source.
As shown in Figure 1, light source 15 includes PCB lamp board 15a, and the LED light 15b on PCB lamp board 15a, PCB lamp board
The incidence surface 12a of 15a and light guide plate 12 are oppositely arranged, and LED light 15b is set to the one of incidence surface 12a of the pcb board towards light guide plate 12
Side.In the present embodiment, reflecting plate 21 can be made to stretch out in one end of the incidence surface 12a of light guide plate 12 with PCB lamp board 15a as far as possible
It is close, to reduce the light quantity that gaps of the LED light 15b between reflecting plate 21 and PCB lamp board 15a leaks out.
It is alternatively possible to the one end for the incidence surface 12a that reflecting plate 21 stretches out in light guide plate 12 is made to be abutted with PCB lamp board 15a,
Alternatively, the one end for the incidence surface 12a that reflecting plate 21 stretches out in light guide plate 12 is made to cross PCB lamp board 15a entering towards light guide plate 12
A side surface of smooth surface 12a, thereby, it is possible to avoid the light self-reflection plate 21 of LED light 15b and PCB lamp board 15a to the greatest extent
Between gap leak out.
In the present embodiment, reflecting plate 21 can be made to extend along the length direction of the incident side of light guide plate 12, so that reflecting plate
21 can reflect the light of multiple LED light 15b incidence surface 12a for not being irradiated to light guide plate 12.It is of course also possible to along leading
The length direction of the incident side of tabula rasa 12 is distributed multiple reflecting plates 21, makes each reflecting plate 21 and a position pair LED light 15b
It answers.
In order to make reflecting plate 21 have preferable reflecting effect, in the present embodiment, reflecting plate 21 can be made by high reflectance
Material be made, alternatively, be coated with the highly-reflective coatings such as white ink in side of the reflecting plate 21 towards light source 15, to improve reflection
The reflecting rate of plate 21.
It is alternatively possible to make the reflectivity of reflecting plate 21 be greater than or equal to 95%, so that reflecting plate 21 has preferably instead
Light effect.
Furthermore it is also possible to make the reflectivity of reflecting plate 21 be less than or equal to 99%, so that reflecting plate 21 has preferably instead
While penetrating effect, the material requirement to reflecting plate 21 is reduced, and then reduce the cost of reflecting plate 21.
In the present embodiment, reflecting plate 21 and the side of 12 thickness direction of light guide plate can be made to abut, it can also be with light guide plate
The side of 12 thickness directions is spaced apart, certainly, when reflecting plate 21 is abutted with the side of 12 thickness direction of light guide plate, instead
Penetrating plate 21 can reflex to more light in light guide plate 12.
Wherein it is possible to make reflecting plate 21 and light guide plate 12 by stickup, light guide plate 12 and the modes such as the extruding of other components
The side of thickness direction abuts, and the present embodiment is not restricted.
In the present embodiment, the both sides of light guide plate 12 can be made to be respectively provided with reflecting plate 21, LED light 15b is located at two reflections as a result,
Between plate 21, the light of the both sides LED light 15b or more can be reflected onto the incidence surface 12a of light guide plate 12, the light efficiency of light source 15
Utilization rate higher.
It is possible to further make two reflecting plates 21 be close to PCB lamp board 15a, so that two reflecting plate 21 and PCB lamp board 15a
It is enclosed the reflection cavity for accommodating LED light 15b, the inner wall of the reflection cavity reflects the light of LED light 15b, thus into one
Step improves the light efficiency utilization rate of LED light 15b.
In a preferred embodiment, the reflecting plate 21 set on 12 lower surface of light guide plate can be made to stretch out in light guide plate 12
Incidence surface 12a, and outwardly connect with sides of the PCB lamp board 15a towards light guide plate 12, meanwhile, make the anti-of 12 upper surface of light guide plate
Penetrate plate 21 and stretch out in the incidence surface 12a of light guide plate 12, and make the reflecting plate 21 stretch out in light guide plate 12 incidence surface 12a one end
The upper surface of PCB lamp board 15a is opposite, and two reflecting plate 21 and PCB lamp board 15a can be enclosed closed reflection cavity as a result,
The light efficiency utilization rate higher of LED light 15b.
On the basis of above-mentioned any one embodiment, as shown in figure 4, backlight module 10 can be made to further include radiating piece 22,
The radiating piece 22 is set to the side that backboard 11 deviates from light guide plate 12, and radiating piece 22 will not be after temperature distortion, to backlight as a result,
Other parts in module 10, which are formed, to be squeezed, and is distributed into the air of surrounding heat moreover, being relatively beneficial to radiating piece 22, is carried
High cooling efficiency.
Wherein, radiating piece 22 can be made of the higher material of the radiating efficiencys such as copper, aluminium, wherein when radiating piece 22 is by aluminium
Support makes, and the radiating efficiency of radiating piece 22 is higher, and cost is relatively low.
In a preferred embodiment, 22 setting in a strip shape of radiating piece can be made, and in radiating piece 22 towards light guide plate 12
The end of incident side open up mounting groove 22a, mounting groove 22a is for installing PCB lamp board 15a, so that PCB lamps 15b is as far as possible
Close light guide plate 12 incidence surface 12a, increase and enter light quantity in light guide plate 12.
In the present embodiment, it includes the front frame press strip 19 positioned at 12 incident side of light guide plate that can also make backlight module 10, before this
Frame press strip 19 includes the first side plate 19a and the second side plate for being arranged in angle, and extending along the length direction of front frame press strip 19
19b, wherein the second side plate 19b is located at the side that PCB lamp board 15a deviates from light guide plate 12, and the first side plate 19a is located at light guide plate 12
Away from the side of backboard 11, to be limited to light guide plate 12 and backboard 11.
Wherein it is possible to which the reflecting plate 21 above light guide plate 12 is pasted on the first side plate 19a towards light guide plate 12
Side, to avoid side of the reflecting plate 21 towards light guide plate 12 has glue and influences reflecting effect.
Likewise it is possible to the reflecting plate 21 of 12 lower section of light guide plate is pasted on side of the backboard 11 towards light guide plate 12, this
Place repeats no more.
It is understood that due to the utility model proposes liquid crystal display device include above-mentioned backlight module all realities
All schemes of example are applied, therefore, at least there is technique effect identical with the backlight module, do not illustrate one by one herein.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of backlight module, which is characterized in that the backlight module includes light guide plate and optical diaphragm, the light guide plate towards
The side of the optical diaphragm is provided with coating layer, and the refractive index of the coating layer is less than the refractive index of the light guide plate, described
Optical diaphragm fits in the side that the coating layer deviates from the light guide plate entirely.
2. backlight module as described in claim 1, which is characterized in that the refractive index of the coating layer is less than or equal to 1.52.
3. backlight module as described in claim 1, which is characterized in that the backlight module further includes shading piece, the shading
Part coats the edge of the non-light incidence side of the light guide plate.
4. the backlight module as described in claims 1 to 3 any one, which is characterized in that the backlight module further includes and institute
That states that the non-light incidence side of light guide plate is oppositely arranged blocks item, and the item that blocks prolongs along the length direction of the light guide plate incident side
It stretches, also, the width for blocking item is more than the thickness of the light guide plate.
5. the backlight module as described in claims 1 to 3 any one, which is characterized in that the incident side of the light guide plate is arranged
There is reflecting plate, which is set to the side in the light guide plate direction, and stretches out in the incidence surface of the light guide plate, so that
The incidence surface of the light guide plate and the reflecting plate are enclosed light incidence section domain, and the side entering type light source of the backlight module is located at institute
It states in the domain of light incidence section.
6. backlight module as claimed in claim 5, which is characterized in that the both sides of the light guide plate are both provided with the reflection
Plate, the side entering type light source include PCB lamp board and the LED light in the PCB lamp board, the LED light be located at two reflecting plates it
Between.
7. backlight module as claimed in claim 5, which is characterized in that the reflectivity of the reflecting plate is greater than or equal to 95%.
8. the backlight module as described in claims 1 to 3 any one, which is characterized in that the light guide plate deviates from the optics
The side of diaphragm is pasted on the backboard of the backlight module.
9. the backlight module as described in claims 1 to 3 any one, which is characterized in that the backlight module further includes heat dissipation
Part, the radiating piece are set to side of the backboard away from the light guide plate of the backlight module, to be carried out to the backlight module
Heat dissipation.
10. a kind of liquid crystal display device, which is characterized in that the liquid crystal display device includes shell, liquid crystal display panel and such as right
It is required that the backlight module described in 1 to 9 any one, the backlight module and the liquid crystal display panel are mounted in the shell, and
The liquid crystal display panel is fixedly connected with the light guide plate of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820232202.2U CN207764405U (en) | 2018-02-07 | 2018-02-07 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820232202.2U CN207764405U (en) | 2018-02-07 | 2018-02-07 | Backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN207764405U true CN207764405U (en) | 2018-08-24 |
Family
ID=63180252
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820232202.2U Active CN207764405U (en) | 2018-02-07 | 2018-02-07 | Backlight module and liquid crystal display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109218642A (en) * | 2018-10-19 | 2019-01-15 | 深圳康佳电子科技有限公司 | A kind of television set glass back plate, television set and preparation method thereof |
| CN110161753A (en) * | 2019-05-31 | 2019-08-23 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN112799250A (en) * | 2021-02-22 | 2021-05-14 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN113359224A (en) * | 2020-03-06 | 2021-09-07 | 元太科技工业股份有限公司 | Front light module and display device with same |
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2018
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| CN109218642A (en) * | 2018-10-19 | 2019-01-15 | 深圳康佳电子科技有限公司 | A kind of television set glass back plate, television set and preparation method thereof |
| CN110161753A (en) * | 2019-05-31 | 2019-08-23 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN113359224A (en) * | 2020-03-06 | 2021-09-07 | 元太科技工业股份有限公司 | Front light module and display device with same |
| CN112799250A (en) * | 2021-02-22 | 2021-05-14 | 武汉华星光电技术有限公司 | Backlight module and display device |
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