CN103926645B - Light guide plate, backlight module and display device - Google Patents
Light guide plate, backlight module and display device Download PDFInfo
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- CN103926645B CN103926645B CN201310140685.5A CN201310140685A CN103926645B CN 103926645 B CN103926645 B CN 103926645B CN 201310140685 A CN201310140685 A CN 201310140685A CN 103926645 B CN103926645 B CN 103926645B
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- broached
- guide plate
- tooth design
- light guide
- incidence surface
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- 230000001413 cellular effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract description 6
- 235000009537 plain noodles Nutrition 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 11
- 238000003754 machining Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- -1 Merlon Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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Abstract
The invention discloses a light guide plate and a backlight module adopting the same. This light guide plate include go into the plain noodles, with go into the plain noodles continuous play plain noodles, wherein: the light incident surface is provided with two or more sawtooth structures which are recessed into the light incident surface, and the sawtooth structures are perpendicular to the light emergent surface. The light guide plate has the advantages of uniform light emission, high brightness, excellent optical performance and the like.
Description
Technical field
The present invention relates to a kind of light guide plate and backlight module thereof, particularly relate to a kind of uniform in light emission, brightness height and light
Learn the light guide plate of function admirable and use the backlight module of this light guide plate.
Background technology
Existing backlight module includes light source and light guide plate, and light source is arranged relative to the incidence surface of light guide plate, light guide plate
Guide light source to send the direction of propagation of light beam, point source or line source are converted into area source outgoing.For LED
The light guide plate of (light emitting diode) side backlight, at present for, typically use at the light guide plate relative to light source
Incidence surface be provided with broached-tooth design.As shown in Figure 1a, light guide plate 1 is by including incidence surface 11 and incidence surface
11 exiting surfaces 10 being connected are constituted, and are provided with broached-tooth design 13 at incidence surface 11.When light is by LED
After 12 injections, it is refracted through broached-tooth design 13 and spreads.The light making LED disperses so that aobvious
Show that the display in district (AA district) is uniform.As disclosed in CN201220079031.7, light guide structure passes through
Machining forms broached-tooth design so that the light after sawtooth is more dispersed uniformly.As illustrated in figure 1 c, light
L is refracted and left and right diffusion through broached-tooth design 13.
But the design of above-mentioned broached-tooth design exists certain defect, need to adjust suitable LED 12 mutual
Arrive viewing area (AA district) distance away from LED 12, just can make viewing area brightness uniformity distribution.Its reason
For, the partial enlarged drawing if Fig. 1 b(is Fig. 1 a) shown in, owing to light L is after broached-tooth design 13
Diffusion angle is limited, therefore the mutual spacing of Led Pitch(LED lamp) with LED 12 light-emitting area to showing
Show that district's AA vertical dimension H must is fulfilled for certain ratio, just so that there is light L to form dark space each other
DA, will not enter viewing area AA, thus ensure the brightness uniformity distribution of viewing area AA.
Specifically, it is because as shown in Figure 1 b: the light L sent by LED 12 is through broached-tooth design
After 13 diffusions, refraction angle α is certain value, and A=1/2 (Led Pitch), i.e. A are half length of LED Pitch, B
For the height of dark space DA, B is necessarily less than H(LED lamp 12 light-emitting area to viewing area AA vertical dimension),
The brightness uniformity distribution of tg α=A/B to be met, guarantee viewing area AA.
With continued reference to Fig. 1 b, but owing to low cost and low-power consumption require to reduce the quantity of LED 12, in a disguised form
Increase A, from being analyzed above, then require that B increases (negative effect increases profile) accordingly, or increase angle
Degree α；Further, since module small form factor requirements reduces overall dimensions, need sometimes to reduce B, by upper analysis
Understand, then require that A reduces (arrangement that negative effect increases LED 12) accordingly, or increase angle [alpha].
But owing to α is certain value, therefore limit backlight module low cost to a certain extent at the light entrance structures thereof of this light guide plate
Low-power consumption and the development of miniaturization.
Summary of the invention
For problems of the prior art, it is an object of the invention to provide a kind of light guide plate and backlight mould thereof
Group, this light guide plate has uniform in light emission, brightness height and excellent optical performance, reduces LED to viewing area distance
Etc. advantage.
An exemplary embodiment according to the present invention, it is provided that a kind of light guide plate, it includes incidence surface and institute
State incidence surface be connected exiting surface, wherein: described incidence surface be provided with two or more recessed described in enter
The broached-tooth design of bright finish, described broached-tooth design is perpendicular to described exiting surface.
Preferably, described light guide plate is in the backlight module of side.
Preferably, described incidence surface is made up of refractive index different medium or is made up of same medium.General light guide plate
It is made up of macromolecule polymer material, such as Merlon, polymethyl methacrylate.For by reflecting
The incidence surface that the medium that rate is different is made, can use different media to make at the position that incidence surface is different, example
If the medium of incidence surface front end is Merlon, the medium of other parts of incidence surface is polymethyl methacrylate.
Preferably, described incidence surface is provided with the first broached-tooth design and the second sawtooth knot of recessed described incidence surface
Structure, is provided with an engraved structure between described first broached-tooth design and described second broached-tooth design, in this engraved structure
There is air dielectric.
Preferably, described incidence surface is made up of refractive index different medium, described incidence surface be provided with recessed described in enter
First broached-tooth design of bright finish and the second broached-tooth design, described first broached-tooth design and described second broached-tooth design position
On the medium of different refractivity, incidence surface is not provided with engraved structure, there is not air dielectric layer.
Preferably, it is continuously or intermittently between each cellular construction of described broached-tooth design；Each cellular construction it
Between spacing equal or change in gradient.
Preferably, each cellular construction of described broached-tooth design is triangle or semicircle.
Preferably, described broached-tooth design uses mechanical secondary forming method to be arranged on incidence surface.Specifically,
First use machining mode that the first broached-tooth design is set, then use machining mode that the second sawtooth knot is set
Structure.
An exemplary embodiment according to the present invention, it is provided that a kind of backlight module, including light source, also includes,
Also include above-mentioned light guide plate.
Preferably, described backlight module is side backlight module.
Preferably, described light guide plate is plate shaped or wedge shape.
Preferably, described light source is light emitting diode or bulb.
By can be through above-mentioned technical scheme, compared with prior art, the invention discloses a kind of light guide plate and
Backlight module, this light guide plate is included incidence surface, the exiting surface being connected with described incidence surface by it, wherein: described
Incidence surface is provided with the broached-tooth design of two or more recessed described incidence surface, and described broached-tooth design is vertical
In described exiting surface.This light guide plate has the advantages such as uniform in light emission, brightness height and excellent optical performance, makes lamp source
Front Luminance Distribution evenly, reduces LED to viewing area distance.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, required in embodiment being described below
Accompanying drawing to be used is briefly described, it should be apparent that, the accompanying drawing in describing below is only the one of the present invention
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 a is the schematic diagram of a kind of light guide plate disclosed in prior art；
Fig. 1 b is the schematic diagram of Fig. 1 b partial enlargement；
Fig. 1 c is that light L broached-tooth design in Fig. 1 b is refracted schematic diagram；
Fig. 2 a is the schematic diagram of light guide plate disclosed in the embodiment of the present invention one；
Fig. 2 b is the schematic diagram that light L is refracted in the light guide plate of Fig. 2 a；
Fig. 3 a is the schematic diagram of light guide plate disclosed in the embodiment of the present invention two；
Fig. 3 b is the schematic diagram that light L is refracted in the light guide plate of Fig. 3 a；
Fig. 4 is the schematic diagram of the side backlight module of disclosure of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention rather than complete
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under dynamic premise, broadly falls into the scope of protection of the invention.
The invention discloses a kind of light guide plate and backlight module thereof, by it, this light guide plate includes that incidence surface is with described
Incidence surface be connected exiting surface, wherein: described incidence surface be provided with two or more recessed described in enter light
The broached-tooth design in face, described broached-tooth design is perpendicular to described exiting surface.This light guide plate has uniform in light emission, brightness
Height and excellent optical performance, reduce LED to advantages such as viewing area distances.Concrete structure passes through following example
It is described in detail.
Embodiment one
As shown in Fig. 2 a, Fig. 2 b, the invention discloses the structure of a kind of light guide plate, this light guide plate is plate shaped,
In the backlight module of side.This light guide plate 1 mainly includes incidence surface 11, and this incidence surface 11 is by same medium
Be provided with on materials polycarbonate makes, be connected with incidence surface 11 exiting surface 10, incidence surface 11 two recessed
Enter the broached-tooth design of described incidence surface, respectively first broached-tooth design the 14, second broached-tooth design 15, two saws
Toothing is perpendicular to described exiting surface 10, and each cellular construction of this broached-tooth design is equally spaced continuous structure,
It is shaped as triangle.Broached-tooth design uses mechanical secondary forming method to be arranged on incidence surface.Specifically,
First use machining mode that the first broached-tooth design 14 is set, then use machining mode that the second sawtooth is set
Structure 15.
And between the first broached-tooth design 14 and the second broached-tooth design 15, it is provided with an engraved structure 16, by
Then engraved structure, therefore there is air layer, when light is traveled to the second broached-tooth design by the first broached-tooth design 14
During 15, it is necessary to through the air layer of engraved structure 16, i.e. propagate with air for medium, then by
Air layer enters back in the second broached-tooth design 15.
As shown in Figure 2 b, if in light guide plate 1, it is not provided with the second broached-tooth design 15, engraved structure 16,
Then light can be according to light path L1Propagate, it may be assumed that light is penetrated at an angle by LED 12, by sky
Gas-bearing formation (air dielectric) enters incidence surface 11 first broached-tooth design 14 and is refracted and produces left and right diffusion, with light
Road L1Mode, continue to light guide plate 1 internal communication, enter in the AA of viewing area, then projected by exiting surface 10
Go out an area source outing light.
But owing to light diffusion angle after the first broached-tooth design 14 is limited, therefore Led Pitch(LED lamp
Mutual spacing) half long A must expire to viewing area AA vertical dimension H with LED 12 light-emitting area
The certain ratio of foot, just so that there is light L to form dark space DA each other, will not enter viewing area AA,
Thus ensure the brightness uniformity distribution of viewing area AA, see Fig. 1 b.When the height B of dark space DA is more than H,
Then dark space DA can enter viewing area AA, so that the Luminance Distribution of viewing area AA is uneven.
With continued reference to Fig. 2 b, if in light guide plate 1, first broached-tooth design the 14, second broached-tooth design is set
15, engraved structure 16, then light can be according to light path L2Propagate, i.e. light by LED 12 with certain
Angle penetrates, air layer (air dielectric) entrance incidence surface 11 first broached-tooth design 14 be refracted and produce
Left and right diffusion, continues to light guide plate 1 internal communication；Again through the air layer of engraved structure 16, i.e. with air
Propagate for medium；Being entered back in the second broached-tooth design 15 by air layer again, light enters the second sawtooth knot
Structure 15 can again be refracted and produce further diffusion, with light path L2Mode, continue in light guide plate 1
Portion propagates, and enters in the AA of viewing area, then is projected the area source of a uniform in light emission by exiting surface 10, such as figure
Shown in 4 (in backlight module, miscellaneous part is not shown), for using the schematic diagram of the side backlight module of this light guide plate.
When light is with light path L2Propagate, the first broached-tooth design 14, second is i.e. set on light guide plate 1 and saws
Toothing 15, engraved structure 16, light is reflected for several times and is spread, and the angle of diffusion is relatively big, then without wanting
Adjust suitable LED 12 mutual spacing with LED 12 to viewing area (AA district) distance, do not have
Dark space DA enters the problem of viewing area AA, thus shortens LED 12 to viewing area AA distance, reduction backlight
Module profile；And improve optical effect before light source, make to be gone out light evenly by exiting surface.
Embodiment two
On the basis of the invention described above disclosed embodiment one, the invention discloses the structure of another light guide plate,
As shown in Figure 3 a, 3 b, for this light guide plate schematic diagram, this light guide plate is plate shaped, for side backlight module
In.This light guide plate 1 mainly includes incidence surface 11, and this incidence surface 11 is made up of the two media that refractive index is different,
The medium of incidence surface front end is Merlon M1, the medium of other parts of incidence surface is polymethyl methacrylate
M2.It is provided with two recessed described incidence surfaces on the exiting surface 10 that is connected with incidence surface 11, incidence surface 11
Broached-tooth design, respectively first broached-tooth design the 14, second broached-tooth design 15, two broached-tooth designs are perpendicular to institute
Stating exiting surface 10, each cellular construction of this broached-tooth design is equally spaced continuous structure, and it is shaped as triangle
Shape.First broached-tooth design 14 is arranged on the medium Merlon M1 of incidence surface front end, the second broached-tooth design 15
It is arranged on medium polymethyl methacrylate M2.Due to the first broached-tooth design 14 and the second broached-tooth design 15
On different media, the refractive index of different medium is different, therefore is not provided with engraved structure on incidence surface 11,
There is not air dielectric layer, it is possible to make light be propagated through different media in incidence surface, be refracted for several times.
Broached-tooth design uses post forming method to be arranged on incidence surface.Specifically, machining side is first used
Formula arranges the first broached-tooth design 14, then uses machining mode to arrange the second broached-tooth design 15.
As shown in Figure 3 b, if in light guide plate 1, being not provided with the second broached-tooth design 15 then light can be according to light
Road L1Propagate.
With continued reference to Fig. 3 b, if in light guide plate 1, first broached-tooth design the 14, second broached-tooth design is set
15, then light can be according to light path L3Propagate, i.e. light is penetrated at an angle by LED 12, by
Air layer (air dielectric) enters the M1 dielectric layer of incidence surface 11 first broached-tooth design 14 and is refracted and produces
Left and right diffusion, continues to light guide plate 1 internal communication；Again through the M2 dielectric layer of the second broached-tooth design 15,
I.e. propagate with M2 for medium；Being entered back in the second broached-tooth design 15 by M2 dielectric layer again, light enters
Second broached-tooth design 15 can again be refracted and produce further diffusion, with light path L3Mode, continue to
Light guide plate 1 internal communication, enters in the AA of viewing area, then is projected the face of a uniform in light emission by exiting surface 10
Light source (in backlight module, miscellaneous part is not shown) as shown in Figure 4, for using the side backlight module of this light guide plate
Schematic diagram.
When light is with light path L3Propagate, the first broached-tooth design 14, second is i.e. set on light guide plate 1 and saws
15, two broached-tooth designs of toothing are respectively provided with on medium M1, medium M2, when light enters incidence surface 11
Being reflected for several times afterwards and left and right is spread, the angle of diffusion is relatively big, then without to adjust suitable LED 12 phase
Spacing and LED 12 to viewing area (AA district) distance do not have asking of dark space DA entrance viewing area AA mutually
Topic, thus shorten LED 12 to viewing area AA distance, reduction backlight module profile；And before improving light source
Optical effect, makes to be gone out light evenly by exiting surface.
In this specification, various piece uses the mode gone forward one by one to describe, and what each some importance illustrated is and other
The difference of part, between various piece, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this
Bright.Multiple amendment to these embodiments will be apparent from for those skilled in the art, this
General Principle defined in literary composition can be implemented at other without departing from the spirit or scope of the present invention
Example realizes.Therefore, the present invention is not intended to be limited to embodiment illustrated herein, and is to fit to herein
Disclosed principle and the consistent the widest scope of features of novelty.
Claims (9)
1. a light guide plate, it includes incidence surface, the exiting surface being connected with described incidence surface, it is characterised in that:
Described incidence surface is provided with the broached-tooth design of two or more recessed described incidence surface, described
Broached-tooth design is perpendicular to described exiting surface, and described incidence surface is provided with the first of recessed described incidence surface
Broached-tooth design and the second broached-tooth design, between described first broached-tooth design and described second broached-tooth design
It is provided with an engraved structure.
2. light guide plate as claimed in claim 1, it is characterised in that described incidence surface is situated between by refractive index difference
Matter is made or is made up of same medium.
3. light guide plate as claimed in claim 2, it is characterised in that described incidence surface is situated between by refractive index difference
Matter is made, and described incidence surface is provided with the first broached-tooth design and second sawtooth of recessed described incidence surface
Structure, described first broached-tooth design and described second broached-tooth design are positioned on the medium of different refractivity.
4. light guide plate as claimed in claim 1, it is characterised in that each unit knot of described broached-tooth design
It is continuously or intermittently between structure；Between each cellular construction, spacing is equal or changes in gradient.
5. light guide plate as claimed in claim 1, it is characterised in that each unit knot of described broached-tooth design
Structure is triangle or semicircle.
6. light guide plate as claimed in claim 1, it is characterised in that the forming method of described broached-tooth design is
Mechanical secondary forming method.
7. a backlight module, including light source, it is characterised in that also include such as any one of claim 1-6 institute
The light guide plate stated.
8. backlight module as claimed in claim 7, it is characterised in that described backlight module is side backlight mould
Group；Described light guide plate is plate shaped or wedge shape；Described light source is light emitting diode or bulb.
9. a display device, including backlight module, described backlight module includes light source, it is characterised in that
Described backlight module also includes the light guide plate as described in any one of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140685.5A CN103926645B (en) | 2013-04-22 | 2013-04-22 | Light guide plate, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140685.5A CN103926645B (en) | 2013-04-22 | 2013-04-22 | Light guide plate, backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
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| CN103926645A CN103926645A (en) | 2014-07-16 |
| CN103926645B true CN103926645B (en) | 2016-09-14 |
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| CN201310140685.5A Active CN103926645B (en) | 2013-04-22 | 2013-04-22 | Light guide plate, backlight module and display device |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913797A (en) * | 2014-03-17 | 2014-07-09 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
| CN105629370A (en) | 2016-01-05 | 2016-06-01 | 京东方光科技有限公司 | Light guide plate, backlight module and display device |
| CN105954828A (en) * | 2016-07-12 | 2016-09-21 | 京东方科技集团股份有限公司 | Manufacturing method of light guide plate, light guide plate and backlight source |
| CN106707402B (en) * | 2017-01-11 | 2019-04-23 | 青岛骐骥光电科技有限公司 | A method of solving the problems, such as edge-type light guide plate Hotspot |
| CN107270242A (en) * | 2017-07-21 | 2017-10-20 | 中国科学院上海光学精密机械研究所 | Lift the amplifier architecture of xenon lamp transmission efficiency and distributing homogeneity |
| CN107561628A (en) * | 2017-09-05 | 2018-01-09 | 深圳市华星光电技术有限公司 | Display device, backlight module and its light guide plate |
| CN109358452A (en) * | 2018-12-10 | 2019-02-19 | 深圳市隆利科技股份有限公司 | A kind of light guide plate LED light integral structure and its forming method |
| WO2021022418A1 (en) * | 2019-08-02 | 2021-02-11 | 京东方科技集团股份有限公司 | Light guide assembly, light source module and display device |
| CN111679497A (en) * | 2020-06-17 | 2020-09-18 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display panel |
| CN112086014B (en) * | 2020-09-16 | 2022-03-08 | 武汉华星光电技术有限公司 | Backlight module and display device |
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| KR100499140B1 (en) * | 2003-01-07 | 2005-07-04 | 삼성전자주식회사 | Backlight unit |
| CN101034182A (en) * | 2006-03-10 | 2007-09-12 | 胜华科技股份有限公司 | Light conductive module group |
| KR20090022876A (en) * | 2007-08-31 | 2009-03-04 | 주식회사 나모텍 | Surface light unit for lcd having film type light giude panel |
| CN101694277B (en) * | 2009-10-21 | 2012-06-20 | 瑞仪光电(苏州)有限公司 | Backlight module and beam splitter thereof |
| JP2011258362A (en) * | 2010-06-08 | 2011-12-22 | Mitsubishi Electric Corp | Surface light source device |
| CN202033494U (en) * | 2011-05-13 | 2011-11-09 | 京东方科技集团股份有限公司 | Light guide plate, back light source and display device |
| CN202171654U (en) * | 2011-08-08 | 2012-03-21 | 京东方科技集团股份有限公司 | Light guide plate and LED backlight |
| CN202330756U (en) * | 2011-11-09 | 2012-07-11 | 东莞市新东方光电技术有限公司 | Light guide plate of LED (Light Emitting Diode) backlight source |
| CN202521382U (en) * | 2012-01-10 | 2012-11-07 | 青岛海信电器股份有限公司 | Light guide plate, backlight module and display device |
| CN102565921A (en) * | 2012-02-16 | 2012-07-11 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and liquid crystal display device |
| CN102914815A (en) * | 2012-10-30 | 2013-02-06 | 苏州达方电子有限公司 | Light guide plate structure |
| CN102943975B (en) * | 2012-11-05 | 2015-11-25 | 深圳市华星光电技术有限公司 | Backlight module and display device |
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