CN107561628A - Display device, backlight module and its light guide plate - Google Patents
Display device, backlight module and its light guide plate Download PDFInfo
- Publication number
- CN107561628A CN107561628A CN201710793301.8A CN201710793301A CN107561628A CN 107561628 A CN107561628 A CN 107561628A CN 201710793301 A CN201710793301 A CN 201710793301A CN 107561628 A CN107561628 A CN 107561628A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- light
- optical coating
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of display device, backlight module and its light guide plate, the light guide plate includes upper surface, lower surface, incidence surface and three sides, incidence surface is towards light source, upper surface is obliquely installed with lower surface in the direction for being connected a lateral light source of incidence surface in the shape that tapers close to each other, form chamfering structure, one layer of optical coating is provided with the upper surface of light guide plate, the coating for having luminescence generated by light material is coated with a side surface of upper surface of the optical coating away from light guide plate.The present invention enables to some light for being unsatisfactory for total internal reflection to be set by optical coating and inclined-plane so as to meet total internal reflection, it is therefore prevented that occurs incident side bright band in side backlight so that display screen surface brightness uniformity.
Description
Technical field
The present invention relates to field of liquid crystal display, more particularly to a kind of display device, backlight module and its light guide plate.
Background technology
Along with the continuous development of lcd technology, liquid crystal display panel has been directed to side's aspect of user's life
Face, such as PC, smart mobile phone and tablet personal computer.
In the backlight of liquid crystal display, the thickness of liquid crystal display can be effectively reduced using side backlight, because
This has obtained more applications.The light that the light source of side backlight is sent enters light guide plate, passes through the site of light guide plate bottom
Realize the uniform taking-up of light.Certain amount blooming piece is placed in light guide plate upper surface, for covering mura or increase brightness.
During module design, it will usually display brightness can be substantially improved by increasing by one or two prismatic lenses, the method in diaphragm framework,
Reach and save energy consumption, cost-effective.
This scheme is the mainstream scheme of current design of backlight module, but it is by loss luminance viewing angle to face angular brightness increase
Come what is realized, when causing the general display to be watched from side, display effect is had a greatly reduced quality, and especially needing big visual angle at some sees
Under the application scenario seen, such as outdoor display etc., bring very big puzzlement to the producer and beholder.
For the problem, it is thus proposed that a kind of new LGP processing modes, by coating one layer of photic hair in light guide plate surface
Luminescent material, such as quanta point material, the embedded photoluminescent material can absorb short wavelength's light wave, launch long wavelength's light wave.The process
" etc. tropism illuminating source " can be seen as embedded photoluminescent material is luminous in fact, therefore the light diffusivity sent is preferable, has
Extraordinary luminance viewing angle.The luminance viewing angle adds the big visual angle viewing property of display, it is even more important that as used quantum
The materials such as point, can also greatly put forward colour gamut, improve the viewing experience of people.It is further of importance that the luminescence generated by light coating has
Preferable light peptizaiton, can cover point defect caused by site, can not only save conventional blooming piece, can also be further
Lift viewing effect.
This scheme has good novelty, but in actual applications, can there is obvious problem.In traditional side entering type scheme
In, light guide panel material is generally PMMA/PC/MS/Glass etc., and its refractive index is bigger, therefore the light entered inside light guide plate
Inner total reflection can occur, by setting the site necessarily arranged in light guide plate lower surface, light taking-up can be carried out.But the program
In, light guide plate upper surface directly carries out the coating of photoluminescent layers, is so designed that, even if into the light inside light guide plate without
Site scattering is crossed, can equally enter photoluminescent layers, this some light to photoluminescent layers by exciting, the tropism such as outgoing
Light, it can be emitted from luminescence generated by light layer surface, in this way, traditional light guide plate mesh point, which does not recur, takes the effect of light, cause light
It can largely take out, can not uniformly take out from close to light inputting end, incident side bright band occur, form display screen surface brightness disproportionation, sternly
Reppear existing taste problem.
The content of the invention
The present invention solves the technical problem of provide a kind of display device, backlight module and its light guide plate, Neng Gouyou
Effect, which improves, there is incident side bright band in side backlight, form display screen surface brightness disproportionation, asking for taste problem seriously occur
Topic.
In order to solve the above technical problems, first technical scheme that the present invention uses is：A kind of light guide plate is provided, including it is upper
Surface, lower surface, connection upper surface and the incidence surface of lower surface and three sides, three sides are sequentially connected, and two sides
The side of edge connects the both ends of incidence surface respectively, and side and the incidence surface in centre position are oppositely arranged, incidence surface towards light source, on
Surface is obliquely installed with lower surface in the direction for being connected a lateral light source of incidence surface in the shape that tapers close to each other, forms chamfering
Structure, one layer of optical coating is provided with the upper surface of light guide plate, and the refractive index of optical coating is less than the refractive index of light guide plate, light
Learn and be coated with embedded photoluminescent material coating on a side surface of upper surface of the coating away from light guide plate.
In order to solve the above technical problems, second technical scheme that the present invention uses is：A kind of backlight module is provided, the back of the body
Optical mode group includes light source and the light guide plate of above-mentioned embodiment.
In order to solve the above technical problems, the 3rd technical scheme that the present invention uses is：A kind of display device is provided, this is aobvious
Showing device includes the backlight module of above-mentioned embodiment.
The beneficial effects of the invention are as follows：Prior art is different from, the present invention is formed towards light source in the incident side of light guide plate
Taper shape chamfering structure, enable to some light for being unsatisfactory for total internal reflection to be set by inclined-plane anti-in complete so as to meet
Penetrate, and can reflect farther during the light reflection of incident side, be not concentrated in the incident side of light guide plate, it is therefore prevented that side type
Occur incident side bright band in backlight, and optical coating is coated between light guide plate and embedded photoluminescent material coating so that be aobvious
Display screen surface brightness is uniform, is not in taste problem.
Brief description of the drawings
Fig. 1 is the side structure schematic view of an embodiment of the application light guide plate；
Fig. 2 is the side structure schematic view of another embodiment of the application light guide plate；
Fig. 3 is the side structure schematic view of an embodiment of the application backlight module；
Fig. 4 is the cross section structure schematic diagram of an embodiment of the application display device.
Embodiment
As shown in figure 1, Fig. 1 is the side structure schematic view of an embodiment of light guide plate of the present invention.Present embodiment
Light guide plate 10 is platy structure, including upper surface 11, lower surface 12, connection upper surface 11 and lower surface 12 incidence surface 13 and
Three sides 14.
The material of light guide plate 10 is generally PMMA, PC, MS or glass etc., and the refractive index of light guide plate 10 is preferably greater than 1.7.
Wherein, three sides 14 are sequentially connected, and the side 14 at two edges connects the both ends of incidence surface 13 respectively, middle
The side 14 of position is oppositely arranged with incidence surface 13.Incidence surface 13 is set towards light source 19.Upper surface 11 is exiting surface.Upper surface
11 are obliquely installed with lower surface 12 in the side for being connected incidence surface 13 in the shape that tapers close to each other, form chamfering structure.
In addition, one layer of optical coating 15 is provided with the upper surface 11 of light guide plate 10, optical coating 15 is away from guide-lighting
Embedded photoluminescent material coating 16 is coated with one side surface of the upper surface 11 of plate 10.Wherein, the refractive index of optical coating 15 is not
More than 1.42.Preferably, the refractive index of optical coating 15 is not more than 1.36.The optical coating 15 can be wet, also may be used
So that dry type is coated with.The refractive index of optical coating 15 is less than the refractive index of light guide plate 10.
Optical coating 15 is a kind of important component of light guide plate 10, because optical coating 15 is to be coated on light guide plate 10
Exiting surface on, so air layer is not present between optical coating 15 and light guide plate 10.But due to the refractive index of optical coating 15
Less than the refractive index of light guide plate 20, so inside light guide plate 10, the light of the exiting surface of light guide plate 10 is incided at a certain angle
Line remains to be totally reflected, and ensures that some light in the light that light source is sent can be transferred to the one of remote light source of light guide plate 10
Side, and then ensure that the generation of uniform face light.
Embedded photoluminescent material coating 16 can produce the wider array of refraction of scope when receiving illumination so that visual angle becomes big.Cause
For such a design, light derived from the institute of light guide plate 10 is more uniform, and range of scatter is bigger, using the teaching of the invention it is possible to provide bigger visual angle is given
Beholder.
It is such a to can be designed so that some light for being unsatisfactory for total internal reflection are set by inclined-plane so as to meet total internal reflection.
Also, such a design is also prevented from light and concentrates on this one end of incident side, therefore incident side bright band phenomenon will not occur.
As can be seen, chamfering structure makes to be formed one on upper surface 11 or lower surface 12 more than 135 degree and is less than the blunt of 180 degree
Angle.It is preferred that this angle is more than 150 degree.
Or in other embodiments, incidence surface could be arranged to opposite sides, corresponding two row light sources 19, can obtain
More preferable daylighting effect.Likewise, the both sides that light guide plate corresponds to incidence surface are provided with the chamfering structure for tapering shape.
As shown in Fig. 2 Fig. 2 is the side structure schematic view of another embodiment of light guide plate of the present invention.In this embodiment party
In formula, light guide plate 20 is similarly platy structure, including upper surface 21, lower surface 22, incidence surface 23 and three sides 24.Enter light
Face 23 is set towards light source.Upper surface 21 tilts with lower surface 22 in the side for being connected incidence surface 23 in the shape that tapers close to each other
Set, form chamfering structure.The height of incidence surface 23 is less than the average height of side 24.That is, due to chamfering structure, make
Incidence surface 23 is obtained to diminish.
The material of light guide plate 20 is generally PMMA, PC, MS or glass etc..In addition, on the lower surface 22 of light guide plate 20, set
There is site 221.Site 221 can be used in transmission of the interference light inside light guide plate 20, make light from the upper table of light guide plate 20
Face 21 is projected and forming face light.
In addition, one layer of optical coating 25 is provided with the upper surface 21 of light guide plate 20, optical coating 25 is away from guide-lighting
Embedded photoluminescent material coating 26 is coated with one side surface of the upper surface 21 of plate 20, embedded photoluminescent material coating 26 is away from optics
Obstruct membrane 27 is provided with one side surface of coating 25.Embedded photoluminescent material coating 26 includes R/G light-emitting particles 28 or scattering
One kind or its combination in particle 29.The effect of Obstruct membrane 27 is to increase the reliability of optical coating 25.
Wherein, the refractive index of optical coating 25 is not more than 1.42.Preferably, the refractive index of optical coating 25 is not more than
1.36.That is, the refractive index of optical coating 25 is less than the refractive index of light guide plate 20, the optical coating 25 can be that wet type applies
Cloth, dry type can also be coated with.
Optical coating 25 is a kind of important component of light guide plate 20, because optical coating 25 is to be coated on light guide plate 20
Exiting surface on, so air layer is not present between optical coating 25 and light guide plate 20.But due to the refractive index of optical coating 25
Less than the refractive index of light guide plate 20, so inside light guide plate 20, the light of the exiting surface of light guide plate 20 is incided at a certain angle
Line remains to be totally reflected, and ensures that some light in the light that light source is sent can be transferred to the one of remote light source of light guide plate 20
Side, and then ensure that the generation of uniform face light.Likewise, between embedded photoluminescent material coating 26 and optical coating 25, obstruct
Air layer is not present between film 27 and embedded photoluminescent material coating 26, to ensure light quality.
In other embodiments, can be without using site 221, but one layer is set on the lower surface 22 of light guide plate 20 instead
Penetrate layer.
R/G light-emitting particles 28 in embedded photoluminescent material coating 26 are red green two kinds of incandescnet particles, and scattering particles 29 can
For resin material or inorganic particulate.Embedded photoluminescent material coating 16 can produce the wider array of refraction of scope, make when receiving illumination
Obtain visual angle and become big.Because such a design, light derived from the institute of light guide plate 10 is more uniform, and range of scatter is bigger, Neng Gouti
For bigger visual angle to beholder.
As shown in figure 3, Fig. 3 is the side structure schematic view of an embodiment of backlight module of the present invention.In this embodiment party
In formula, backlight module 30 includes light guide plate 20 and light source 39.Wherein, light guide plate 20 is the light guide plate in a upper embodiment,
Light source 39 to should light guide plate 20 incidence surface set.
As shown in figure 4, Fig. 4 is the cross section structure schematic diagram of an embodiment of the application display device.In this embodiment party
In formula, display device 40 includes the backlight module 30 of a upper embodiment.
By the above-mentioned means, the present invention is formed towards light source in the incident side of light guide plate tapers shape chamfering structure, can
So that some light for being unsatisfactory for total internal reflection are set by inclined-plane so as to meet total internal reflection, and the light reflection of incident side
When, can reflect farther, not be concentrated in the incident side of light guide plate, it is therefore prevented that occur incident side bright band in side backlight, and
And it is coated with optical coating between light guide plate and embedded photoluminescent material coating so that display screen surface brightness uniformity, will not go out
Now sample problem.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, it is included within the scope of the present invention.
Claims (10)
- A kind of 1. light guide plate, it is characterised in that the light guide plate include upper surface, lower surface, the connection upper surface with it is described The incidence surface of lower surface and three sides, three sides are sequentially connected, and the side at two edges connects respectively The both ends of the incidence surface, the side and the incidence surface in centre position are oppositely arranged, and the incidence surface is towards light source, institute State upper surface and taper shape in close to each other in the direction for the lateral light source for being connected the incidence surface with the lower surface It is obliquely installed, forms chamfering structure, one layer of optical coating, the optical coating are provided with the upper surface of the light guide plate Refractive index be less than the light guide plate refractive index, the side table of the upper surface of the optical coating away from the light guide plate Embedded photoluminescent material coating is coated with face.
- 2. light guide plate according to claim 1, it is characterised in that the height of the incidence surface is less than being averaged for the side Highly.
- 3. light guide plate according to claim 1, it is characterised in that the refractive index of the optical coating is not more than 1.42.
- 4. light guide plate according to claim 1, it is characterised in that the refractive index of the optical coating is not more than 1.36.
- 5. light guide plate according to claim 1, it is characterised in that the embedded photoluminescent material coating includes R/G and lighted One kind or its combination in particle or scattering particles.
- 6. light guide plate according to claim 1, it is characterised in that the embedded photoluminescent material coating applies away from the optics Obstruct membrane is provided with one side surface of layer.
- 7. according to the light guide plate described in any one in claim 1-6, it is characterised in that set on the lower surface of the light guide plate It is equipped with site.
- 8. according to the light guide plate described in any one in claim 1-6, it is characterised in that the chamfering structure makes the upper table One is formed on face or the lower surface and is more than 135 degree and less than the obtuse angle of 180 degree.
- 9. a kind of backlight module, it is characterised in that the backlight module includes the leaded light described in any one in claim 1-8 Plate.
- 10. a kind of display device, it is characterised in that the display device includes the backlight module described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793301.8A CN107561628A (en) | 2017-09-05 | 2017-09-05 | Display device, backlight module and its light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793301.8A CN107561628A (en) | 2017-09-05 | 2017-09-05 | Display device, backlight module and its light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107561628A true CN107561628A (en) | 2018-01-09 |
Family
ID=60979455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710793301.8A Pending CN107561628A (en) | 2017-09-05 | 2017-09-05 | Display device, backlight module and its light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107561628A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319375A (en) * | 2018-03-30 | 2019-10-11 | 松下知识产权经营株式会社 | Lighting device |
| CN111077695A (en) * | 2018-10-18 | 2020-04-28 | 三星显示有限公司 | Backlight unit and display device including the same |
| CN112204448A (en) * | 2018-04-10 | 2021-01-08 | 协和(香港)国际教育有限公司 | Convex protrusions in image displays based on total internal reflection |
| CN114185192A (en) * | 2021-12-09 | 2022-03-15 | 武汉华星光电技术有限公司 | Light-emitting panel and display device |
| CN115407558A (en) * | 2022-08-30 | 2022-11-29 | 苏州华星光电技术有限公司 | Display device and electronic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736776A (en) * | 2011-04-13 | 2012-10-17 | 元太科技工业股份有限公司 | Touch display with front light module |
| CN102866454A (en) * | 2012-09-24 | 2013-01-09 | 深圳市汇晨电子有限公司 | Integrated light guide plate with light diffusion function |
| CN103926645A (en) * | 2013-04-22 | 2014-07-16 | 上海天马微电子有限公司 | Light guide plate, backlight module and display device |
| CN105353557A (en) * | 2015-11-03 | 2016-02-24 | 纳晶科技股份有限公司 | Backlight module and display device |
| CN106094097A (en) * | 2016-08-18 | 2016-11-09 | 京东方科技集团股份有限公司 | Light guide plate and apply its backlight module, display device |
| CN206096535U (en) * | 2016-10-21 | 2017-04-12 | 厦门玻尔科技有限公司 | Quantum dot light guide plate |
| CN107121723A (en) * | 2017-05-16 | 2017-09-01 | 深圳市华星光电技术有限公司 | A kind of light guide plate, backlight module and display device |
-
2017
- 2017-09-05 CN CN201710793301.8A patent/CN107561628A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736776A (en) * | 2011-04-13 | 2012-10-17 | 元太科技工业股份有限公司 | Touch display with front light module |
| CN102866454A (en) * | 2012-09-24 | 2013-01-09 | 深圳市汇晨电子有限公司 | Integrated light guide plate with light diffusion function |
| CN103926645A (en) * | 2013-04-22 | 2014-07-16 | 上海天马微电子有限公司 | Light guide plate, backlight module and display device |
| CN105353557A (en) * | 2015-11-03 | 2016-02-24 | 纳晶科技股份有限公司 | Backlight module and display device |
| CN106094097A (en) * | 2016-08-18 | 2016-11-09 | 京东方科技集团股份有限公司 | Light guide plate and apply its backlight module, display device |
| CN206096535U (en) * | 2016-10-21 | 2017-04-12 | 厦门玻尔科技有限公司 | Quantum dot light guide plate |
| CN107121723A (en) * | 2017-05-16 | 2017-09-01 | 深圳市华星光电技术有限公司 | A kind of light guide plate, backlight module and display device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319375A (en) * | 2018-03-30 | 2019-10-11 | 松下知识产权经营株式会社 | Lighting device |
| CN112204448A (en) * | 2018-04-10 | 2021-01-08 | 协和(香港)国际教育有限公司 | Convex protrusions in image displays based on total internal reflection |
| CN112204448B (en) * | 2018-04-10 | 2023-04-28 | 无锡科领显示科技有限公司 | Convex protrusion in total internal reflection based image display |
| CN111077695A (en) * | 2018-10-18 | 2020-04-28 | 三星显示有限公司 | Backlight unit and display device including the same |
| CN114185192A (en) * | 2021-12-09 | 2022-03-15 | 武汉华星光电技术有限公司 | Light-emitting panel and display device |
| CN115407558A (en) * | 2022-08-30 | 2022-11-29 | 苏州华星光电技术有限公司 | Display device and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107561628A (en) | Display device, backlight module and its light guide plate | |
| KR100386105B1 (en) | Reflection type liquid crystal display appartatus and reflection type color liquid crystal display apparatus | |
| TWI422922B (en) | A planar lighting device, and a liquid crystal display device provided with the same | |
| CN207067593U (en) | A kind of liquid crystal display panel | |
| JP6289434B2 (en) | Lighting module | |
| CN106019697A (en) | Display apparatus | |
| CN104995551A (en) | High color gamut quantum dot display | |
| CN105444045A (en) | LED luminescent device, a backlight unit and a display panel | |
| CN204213723U (en) | A kind of backlight module and display | |
| CN103225773B (en) | A kind of Sidelight type LED dynamic backlight module and liquid crystal indicator | |
| CN102859261A (en) | Planar light source apparatus and display apparatus using same | |
| CN103542276B (en) | Reflective display panel realizes the method for radiant evenly | |
| CN107340646A (en) | Backlight module and liquid crystal display | |
| WO2020063155A1 (en) | Led display screen | |
| CN109557719B (en) | Direct type zero OD backlight structure with semi-reflective and semi-transparent light guide plate | |
| WO2021047412A1 (en) | Led screen | |
| KR20190053251A (en) | Edge illumination light guide plates and devices including the same | |
| CN101701693A (en) | Light-emitting device | |
| CN108167683A (en) | Complex diffuser and ultra-thin down straight aphototropism mode set | |
| CN205374796U (en) | Glass light guide plate and liquid crystal display module thereof | |
| CN213069413U (en) | Laser backlight reinforced liquid crystal panel and liquid crystal display | |
| KR101070686B1 (en) | Composite Sheet for LCD, and Backlight Unit Using The Same | |
| KR20070016596A (en) | Diffusion panel for liquid crystal display device and back light unit thereof | |
| CN101706044A (en) | led backlight module | |
| KR20140067471A (en) | Diffusing light guide film, backlight unit, and liquid crystal display device having thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180109 |
|
| RJ01 | Rejection of invention patent application after publication |