CN208752343U - A kind of sidelight type backlight module anti-light leakage structure - Google Patents
A kind of sidelight type backlight module anti-light leakage structure Download PDFInfo
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- CN208752343U CN208752343U CN201820986530.1U CN201820986530U CN208752343U CN 208752343 U CN208752343 U CN 208752343U CN 201820986530 U CN201820986530 U CN 201820986530U CN 208752343 U CN208752343 U CN 208752343U
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- light
- guide plate
- light guide
- backlight module
- backboard
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Abstract
The utility model discloses a kind of sidelight type backlight module anti-light leakage structures, solves the problems, such as traditional sidelight type backlight module light leakage, including the backboard, light guide plate and optical diaphragm set gradually, it further include the heat sink strip being arranged between backboard and light guide plate, the heat sink strip includes the backboard radiating part being arranged on backboard and perpendicular to backboard radiating part and blocks the side radiating part on the outside of light guide plate；LED light bar is provided on the side radiating part, total reflection eyeglass is provided between the LED light bar and light guide plate, the optical path for entering light by optimization LED light bar and light guide plate changes the path that traditional light is propagated, to avoid the problem that LED is leaked out in incident side light.
Description
Technical field
The utility model relates to lighting areas, more specifically, it relates to a kind of sidelight type backlight module anti-light leakage structure.
Background technique
Currently, being widely used in backlight module since LED has many advantages, such as energy-saving and environmental protection, stable structure.When
When LED is used in sidelight type backlight module, since LED is class lambert's light emitting source, when the incident side narrower width of light guide plate, light
Line can exceed the incidence surface width of light guide plate, leak out above light guide plate to understand some light, do not enter into light guide plate
In, this phenomenon is known as light leakage phenomena, can seriously affect the subjective effect of backlight display mould group.
And at present due to the limitation of cost factor, light guide plate increasingly tends to be thinned, in backlight module largely all
Using the light guide plate of 2mm wide, slim light guide plate will receive LED and shed the influence of heat in incident side, so that warpage is deformed,
It is easy to appear light leakage phenomenas.
Therefore, the prior art could be improved and develop.
Utility model content
The purpose of the utility model is to provide a kind of sidelight type backlight module anti-light leakage structures, have and LED is avoided to enter light
The advantages of leakage of sidelight line.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of sidelight type backlight module anti-light leakage structure, including the backboard, light guide plate and optical diaphragm set gradually,
In, it further include the heat sink strip being arranged between backboard and light guide plate, the heat sink strip includes the backboard heat dissipation being arranged on backboard
Portion and perpendicular to backboard radiating part and block the side radiating part on the outside of light guide plate；LED light is provided on the side radiating part
Item is provided with total reflection eyeglass between the LED light bar and light guide plate.
The sidelight type backlight module anti-light leakage structure, wherein the LED light bar includes being arranged on the inside of the radiating part of side
Pcb board and be arranged on pcb board and towards the LED light that backboard shines, the incidence surface of the total reflection eyeglass and LED light
Light-emitting surface is oppositely arranged.
The sidelight type backlight module anti-light leakage structure, wherein it is described total reflection eyeglass refractive index be greater than air and
With so that incident ray, which is totally reflected, is converted into the horizontal curvature for injecting light guide plate.
The sidelight type backlight module anti-light leakage structure, wherein the LED light is arranged perpendicular to pcb board and light-emitting surface
Width is less than the incidence surface of total reflection eyeglass.
The sidelight type backlight module anti-light leakage structure, wherein the junction of the total reflection eyeglass and pcb board is arranged
There is smooth connecting end surface, and pcb board is adhered to by connecting end surface.
The sidelight type backlight module anti-light leakage structure, wherein the LED light bar is fixed by heat-conducting glue or fastener
It is set on heat sink strip, the LED light and pcb board are electrically connected by pad.
The sidelight type backlight module anti-light leakage structure, wherein being additionally provided between the pcb board and light guide plate has
The plastic frame of reflectivity, the plastic frame cover on the outside of LED light bar, and one end of the plastic frame is removably connected to pcb board,
The other end is removably connected to light guide plate.
The sidelight type backlight module anti-light leakage structure, wherein the incident side of the light guide plate is provided with step structure,
The plastic frame is provided with the card slot being adapted to step structure with the junction of light guide plate；The plastic frame passes through buckle or glue
It is connected to pcb board.
The sidelight type backlight module anti-light leakage structure, wherein it is anti-to be provided with bottom surface between the backboard and light guide plate
Piece is penetrated, the light-emitting surface of the bottom reflection piece and the incident side of light guide plate are oppositely arranged.
The sidelight type backlight module anti-light leakage structure, wherein it is provided with liquid crystal display panel on the outside of the optical diaphragm,
And center and front frame for assembling liquid crystal display panel.
In conclusion the utility model enters the optical path of light by optimization LED light bar and light guide plate, change LED light bar respectively
Reach the leakage problem for avoiding LED in incident side light to change the path of light propagation with the structure of light guide plate.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the present embodiment.
Fig. 2 is backlight module paths schematic diagram in the present embodiment.
Fig. 3 is the structural schematic diagram that eyeglass is totally reflected in embodiment.
In figure: 11, backboard；12, bottom reflection piece；13, light guide plate；131, step structure；14, optical diaphragm；15, liquid crystal
Panel；16, center；17, front frame；2, heat sink strip；21, backboard radiating part；22, side radiating part；3, LED light bar；31, LED light；
32, pcb board；4, it is totally reflected eyeglass；41, connecting end surface；42, reflecting surface；43, incidence surface；44, light-emitting surface；5, plastic frame；51,
Card slot.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Embodiment: a kind of sidelight type backlight module anti-light leakage structure, as shown in Figure 1, including the backboard 11 set gradually, bottom
Face reflector plate 12, light guide plate 13 and optical diaphragm 14 further include the heat sink strip 2 being arranged between backboard 11 and light guide plate 13,
The heat sink strip 2 is specifically located between backboard 11 and bottom reflection piece 12, the heat sink strip 2 preferably heat dissipation aluminum strip, packet
The backboard radiating part 21 being arranged on backboard 11 and the side radiating part 22 perpendicular to backboard radiating part 21 are included, side radiating part 22 hides
It is blocked in the lateral surface of light guide plate 13.Be provided with LED light bar 3 on the side radiating part 22, the LED light bar 3 and light guide plate 13 it
Between be provided with total reflection eyeglass 4.
The bottom reflection piece 12 is arranged between backboard 11 and light guide plate 13, the light-emitting surface of the bottom reflection piece 12 with
The incident side of light guide plate 13 is oppositely arranged.The outside of the optical diaphragm 14 is provided with liquid crystal display panel 15, and for assembling liquid
The center 16 and front frame 17 of crystal panel 15.
The LED light bar 3 includes that the pcb board 32 of the inside of side radiating part 22 is arranged in and is arranged on pcb board 32 and court
The LED light 31 to shine to backboard 11, the incidence surface of the total reflection eyeglass 4 and the light-emitting surface of LED light 31 are oppositely arranged.Specifically
, the LED light 31 is the white LED lamp that single side shines, through pad Surface Mount on pcb board 32, light-emitting surface direction back
Plate 11, and be oppositely arranged with total reflection 4 incidence surface of eyeglass.
Specifically, the LED light 31 is arranged perpendicular to pcb board 32, the LED light 31 and pcb board 32 by pad into
Row electrical connection, forms LED light bar 3, and LED light bar is locked on heat sink strip by heat-conducting glue band or screw.
The structure of the total reflection eyeglass 4 is the eyeglass with a fully reflecting surface, and eyeglass material is optical-grade plastic
PMMA/PC or optical glass, refractive index is greater than air, while reflecting surface has certain curvature, can be by top incidence
Radiation direction total reflection is converted to horizontal exit direction, so that glancing incidence enters light guide plate, bottom is fixed on by glue
PCB is upper to be aligned with LED.
Specifically, as shown in figure 3, total reflection eyeglass 4 passes through injection molding, including a reflecting surface 42, an incidence surface
43 and a light-emitting surface 44, reflecting surface has so that incident ray, which is totally reflected, is converted into the horizontal song for injecting light guide plate 13
Rate.
The concrete specification of the LED light 31 can wait for 4014/3020/7020/7016 and encapsulate specification, light-emitting surface width
Less than the incidence surface of total reflection eyeglass 4.It is parallel with LED light-emitting surface to be totally reflected 4 incidence surface of eyeglass, light-emitting surface and light guide plate 13 enter light
Face is parallel.
The plastic frame 5 with reflectivity is additionally provided between the pcb board 32 and light guide plate 13, the plastic frame 5 is provide with
In 3 outside of LED light bar, one end of the plastic frame 5 is removably connected to pcb board 32, and the other end is removably connected to light guide plate
13.Specifically, the plastic frame 5 is white plastic frame 5, material is the materials that are heat-resisting while having reflectivity such as PCT/EMC,
And it is fixed on PCB by glue or buckle.
The incident side of the light guide plate 13 is provided with step structure 131, and the junction of the plastic frame 5 and light guide plate 13 is set
It is equipped with the card slot 51 being adapted to step structure 131；The plastic frame 5 is connected to pcb board 32 by buckle or glue.Specifically,
13 material of light guide plate be PMMA/MS/PC/ glass, incident side have step structure 131, by step structure 131 with it is white
Color plastic frame 5 carries out structure cooperation.
The utility model enters the optical path of light by optimization LED light bar 3 and light guide plate 13, changes LED light bar 3 and leaded light respectively
The structure of plate 13 reaches the leakage problem for avoiding LED in incident side light to change the path of light propagation.
Light leakage principle is prevented referring to FIG. 2, wherein, 31 light-emitting surface of LED light is arranged towards backboard 11, in this way overwhelming majority light
Line, which enters in total reflection eyeglass, can be totally reflected into horizontal direction, so that light enters in light guide plate 13 from below plastic frame 5,
Since LED shines as Lambertian source so the reflecting surface of eyeglass has certain curvature during it, shine court additionally, due to LED
It is arranged to backboard 11 so the case where being overflowed there is no light, while plastic frame 5 and light guide plate 13 carry out structure cooperation, so that
Remaining spurious rays also can not go out be shot out from top.Therefore, the backlight module leakage of the prior art can effectively be improved
Optical phenomenon.
Fig. 1 is please referred to be illustrated the assembling process of light-entry structure in the utility model:
By 31 labeling of LED light on pcb board 32, while plastic frame 5 and total reflection eyeglass 4 being fixed on by double-sided adhesive
On PCB, complete LED light bar 3 is formed.Step structure 131 or hot pressing are produced when hot-forming for 13 early period of light guide plate
Rectangular, the later period carries out cutting molding using cutter.LED light bar 3 is fixed on heat sink strip 2 by heat-conducting glue or screw,
The heat sink strip 2 for pasting LED light bar 3 is locked by screw with backboard 11.Successively bottom reflection is placed on backboard 11
Piece 12, light guide plate 13 and optical diaphragm 14.Wherein 13 incident side of light guide plate and reflecting optics light-emitting surface are opposite.Then block upper center
16, liquid crystal display panel 15 is placed, finally locks front frame 17 with screw.
To sum up, it is compared to and traditional enters light mode (LED light-emitting surface directly aligns light guide plate incidence surface), the utility model
Change the optical path of LED by using total reflection eyeglass, make LED light-emitting surface towards backboard in structure, the light that LED light issues is incident
The light-emitting surface of eyeglass is reflected into after in total reflection eyeglass, light-emitting surface is corresponding below white plastic frame with light guide plate.By
It shines in LED light sheet as lambert, by being collimated after total reflection lens, is then again incident in light guide plate.This structure
Advantage is that LED light does not have to directly align light guide plate, so the light leakage that contraposition generates is not present, while LED light passes through total reflection mirror
Optical path is changed after piece, is not emitted directly, by total reflection eyeglass incidence light guide plate.
In structure, light guide plate and white plastic frame is set to carry out structure cooperation, light guide plate incident side is provided with platform on part
Stage structure, step structure have rectangular notch, and white glue frame is caught in the notch, avoid the light of LED so therefrom
The case where frame gap leaks out, so as to avoid backlight module light leakage phenomena.
It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
It says, it can be modified or changed according to the above description, and all these modifications and variations all should belong to the appended power of the utility model
The protection scope that benefit requires.
Claims (10)
1. a kind of sidelight type backlight module anti-light leakage structure, special including the backboard, light guide plate and optical diaphragm set gradually
Sign is: further including the heat sink strip being arranged between backboard and light guide plate, the heat sink strip includes that the backboard being arranged on backboard dissipates
Hot portion and perpendicular to backboard radiating part and block the side radiating part on the outside of light guide plate；LED is provided on the side radiating part
Lamp bar is provided with total reflection eyeglass between the LED light bar and light guide plate.
2. sidelight type backlight module anti-light leakage structure according to claim 1, it is characterized in that: the LED light bar includes setting
It sets the pcb board on the inside of the radiating part of side and LED light on pcb board and luminous towards backboard, the total reflection eyeglass is set
Incidence surface and the light-emitting surface of LED light be oppositely arranged.
3. sidelight type backlight module anti-light leakage structure according to claim 2, it is characterized in that: the folding of the total reflection eyeglass
Rate is penetrated greater than air and is had so that incident ray, which is totally reflected, is converted into the horizontal curvature for injecting light guide plate.
4. sidelight type backlight module anti-light leakage structure according to claim 3, it is characterized in that: the LED light is perpendicular to PCB
Plate setting and light-emitting surface width are less than the incidence surface of total reflection eyeglass.
5. sidelight type backlight module anti-light leakage structure according to claim 3, it is characterized in that: the total reflection eyeglass with
The junction of pcb board is provided with smooth connecting end surface, and is adhered to pcb board by connecting end surface.
6. sidelight type backlight module anti-light leakage structure according to claim 2, it is characterized in that: the LED light bar is by leading
Hot glue or fastener are fixedly installed on heat sink strip, and the LED light and pcb board are electrically connected by pad.
7. sidelight type backlight module anti-light leakage structure according to claim 2, it is characterized in that: the pcb board and light guide plate
Between be additionally provided with the plastic frame with reflectivity, the plastic frame covers on the outside of LED light bar, and one end of the plastic frame can
Dismantling connection is removably connected to light guide plate in pcb board, the other end.
8. sidelight type backlight module anti-light leakage structure according to claim 7, it is characterized in that: the incident side of the light guide plate
It is provided with step structure, the plastic frame is provided with the card slot being adapted to step structure with the junction of light guide plate；The plastic cement
Frame is connected to pcb board by buckle or glue.
9. sidelight type backlight module anti-light leakage structure according to claim 1, it is characterized in that: the backboard and light guide plate it
Between be provided with bottom reflection piece, the light-emitting surface of the bottom reflection piece and the incident side of light guide plate are oppositely arranged.
10. sidelight type backlight module anti-light leakage structure according to claim 1, it is characterized in that: the optical diaphragm is outer
Side is provided with liquid crystal display panel, and center and front frame for assembling liquid crystal display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820986530.1U CN208752343U (en) | 2018-06-26 | 2018-06-26 | A kind of sidelight type backlight module anti-light leakage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820986530.1U CN208752343U (en) | 2018-06-26 | 2018-06-26 | A kind of sidelight type backlight module anti-light leakage structure |
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| Publication Number | Publication Date |
|---|---|
| CN208752343U true CN208752343U (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820986530.1U Active CN208752343U (en) | 2018-06-26 | 2018-06-26 | A kind of sidelight type backlight module anti-light leakage structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114550595A (en) * | 2022-03-07 | 2022-05-27 | 苏州三星电子电脑有限公司 | Display device and electronic apparatus having the same |
| CN114967228A (en) * | 2022-04-26 | 2022-08-30 | 绵阳惠科光电科技有限公司 | Backlight module and display device |
-
2018
- 2018-06-26 CN CN201820986530.1U patent/CN208752343U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114550595A (en) * | 2022-03-07 | 2022-05-27 | 苏州三星电子电脑有限公司 | Display device and electronic apparatus having the same |
| CN114967228A (en) * | 2022-04-26 | 2022-08-30 | 绵阳惠科光电科技有限公司 | Backlight module and display device |
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