CN206114945U - New light guide plate, Backlight unit and display device - Google Patents
New light guide plate, Backlight unit and display device Download PDFInfo
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- CN206114945U CN206114945U CN201620724480.0U CN201620724480U CN206114945U CN 206114945 U CN206114945 U CN 206114945U CN 201620724480 U CN201620724480 U CN 201620724480U CN 206114945 U CN206114945 U CN 206114945U
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- light
- guide plate
- light guide
- changing element
- wavelength changing
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Abstract
The utility model provides a light guide plate, includes upper surface, lower surface and side, the upper surface is for going out the plain noodles, the lower surface is provided with the light guide network point who comprises a plurality of leaded light points, and at least partly leaded light point is including wavelength conversion element. The utility model discloses a light guide plate utilizes wavelength conversion element's light scattering effect, combines wavelength conversion element or substitute diffuser screen point or the micro -structure among the prior art, directly sets up wavelength conversion element at light guide network point, obtains a neotype light guide plate that has wavelength conversion functions. The utility model discloses a backlight unit and display device have still been provided.
Description
Technical field
This utility model belongs to display field, and in particular to a kind of new light guide plate, backlight module and display device.
Background technology
Quantum dot is also called nanocrystal, be particle diameter be usually between 1-20 nanometers, and the material with crystal structure.By
In electronics and hole by quantum confinement, continuous band structure becomes the discrete energy level structure with molecular characterization, can after being excited
With to around launching fluorescence.The fluorescence emitting characteristics of quantum dot can be realized by controlling its composition, size, structure.
Have that particle size is controllable, be uniformly dispersed due to quantum dot, exciting that transformation efficiency is high, stable and light efficiency is higher etc. and be excellent
Different optical property, which has shown larger application prospect in display device field.The especially luminescent spectrum of quantum dot
Half-peak breadth it is narrower than the fluorescent material that existing display field is used, can make TV that there is high colour gamut (NTSC).
Light guide plate is a critical elements in backlight module, and its major function is guiding radiation direction, with the face of improving
The brightness of light and control brightness uniformity.The lower surface of light guide plate arranges the light directing site with certain arrangement rule, by leaded light
The scattering process of site, destroys total reflection of the light in light guide plate, enables light uniform from light guide plate upper surface outgoing,
So as to line source or point source are converted into area source.By various densitys, light directing site not of uniform size, light guide plate can be made equal
It is even luminous.The light guiding points of prior art mainly include diffusion site, micro structure or low-light grid.
At present, quantum dot is predominantly disperseed in media as well by quantum dot application in a display device, and is arranged on leaded light
Near the incidence surface or exiting surface of plate.Quantum dot is arranged near incidence surface, the impact for being vulnerable to light-source temperature reduces the longevity
Life.Quantum dot is arranged near exiting surface, quantum dot large usage quantity is relatively costly.
Therefore, it is necessary to further the combination to quantum dot with light guide plate is improved.
The content of the invention
Technical problem to be solved in the utility model is：A kind of new light guide plate is provided, light guide plate and wavelength is combined
The characteristics of conversion element.
The utility model discloses a kind of light guide plate, including upper surface, lower surface and side, the upper surface is light
Face, the lower surface are provided with the light directing site being made up of multiple light guiding points, and at least a portion light guiding points include wavelength convert unit
Part.
Preferably, the Wavelength changing element includes quantum dot, fluorescent material or the mixture of the two.
Preferably, the Wavelength changing element is quantum dot, and the quantum dot is dispersed in matrix material.
Preferably, described matrix material includes one or more in polymer, monomer, glass.
Preferably, also include diffusion particle in described matrix material.
Preferably, the lower surface of the light guide plate is provided with substrate, and the light directing site is arranged on the substrate.
Preferably, the light directing site is formed by guide-lighting ink, and the guide-lighting ink includes the wavelength convert
Element.
Preferably, the light directing site includes micro structure, and the micro-structure surface is provided with the Wavelength changing element.
Preferably, the micro structure is the groove to light guide plate inner recess, is turned filled with the wavelength in the groove
Change element.
Preferably, the surface of the Wavelength changing element is provided with sealing member.
Preferably, the exiting surface is provided with microlens structure or prism structure.
Preferably, the light guide plate includes incidence surface, and the incidence surface is located at the side of the light guide plate, near it is described enter
The density of the light directing site of bright finish is less, larger away from the density of the light directing site of the incidence surface.
Preferably, the size near the light directing site of the incidence surface is less, away from leading described in the incidence surface
The size of light site is larger.
The invention also discloses a kind of back light unit, including luminescent device and light guide plate as above.
The invention also discloses a kind of display device, including back light unit as above and it is used for display image
Image panel.
Compared with prior art, this utility model has the advantages that：Light guide plate of the present utility model utilizes wavelength
The light diffusion effect of conversion element, by combining Wavelength changing element or substituting diffusion site of the prior art and micro- knot
Wavelength changing element is directly arranged on light directing site by structure, the combination of Wavelength changing element and light guide plate is directly dissolved into and is led
In the manufacturing process of tabula rasa, a kind of new light guide plate with wavelength convert function is obtained.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the back light unit of specific embodiment in this utility model；
Fig. 2 is a kind of schematic diagram of the light guide plate lower surface of specific embodiment in this utility model；
Schematic diagrams of the Fig. 3 for a light guiding points in light guide plate lower surface in Fig. 2；
Fig. 4 is the schematic diagram of the light guide plate that a kind of lower surface of specific embodiment in this utility model prints light guiding points；
Fig. 5 is the schematic diagram of the light guide plate that a kind of lower surface of specific embodiment in this utility model prints light guiding points；
Fig. 6 has showing for the light guide plate of micro structure light guiding points for a kind of lower surface of specific embodiment in this utility model
It is intended to；
Fig. 7 has showing for the light guide plate of micro structure light guiding points for a kind of lower surface of specific embodiment in this utility model
It is intended to；
Fig. 8 has showing for the light guide plate of micro structure light guiding points for a kind of lower surface of specific embodiment in this utility model
It is intended to；
Fig. 9 is the enlarged diagram of light guiding points in Fig. 4；
Enlarged diagrams of the Figure 10 for Fig. 5 medium wavelength conversion elements；
Figure 11 is a kind of schematic cross-section of the light guide plate of specific embodiment
Figure 12 is a kind of schematic diagram of the light guide plate of specific embodiment in this utility model.
Specific embodiment
Below in conjunction with this utility model embodiment, the technical scheme in this utility model embodiment is carried out in detail
Description, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.
Based on the embodiment in this utility model, those of ordinary skill in the art are obtained on the premise of creative work is not made
The every other embodiment for obtaining, belongs to this utility model protection domain.Accompanying drawing of the present utility model is only schematically illustrate
The embodiment of utility model, its concrete dimension scale are defined by description or technical field common knowledge.
The utility model discloses a kind of display device, including back light unit 100 and the image surface for display image
Plate.Image panel includes but is not limited to liquid crystal panel.As shown in figure 1, back light unit 100 includes luminescent device 102 and light guide plate
104.From from the perspective of light path, light guide plate 104 includes incidence surface 106 and exiting surface 108.Luminescent device 102 is adjacent to into light
Face 106.From from the perspective of shape, light guide plate 104 includes upper surface, lower surface and side.Upper surface is exiting surface 108.
Preferably, luminescent device 102 includes substrate and the multiple light-emitting device chips on substrate.
In one preferred embodiment, back light unit 100 also includes reflector plate 103, for by reflection light plate 104
Lower surface project light reflect back.Another preferred embodiment in, back light unit 100 also include be arranged on out light
Blooming piece above face 108.Blooming piece includes but is not limited to diffusion barrier sheet and brightening film sheet.
Light guide plate 104 shown in Fig. 1 is side entering type, and incidence surface 106 is positioned at the side of light guide plate 104.Another kind of preferred
Embodiment in, light guide plate 104 be straight-down negative, incidence surface 106 for light guide plate 104 lower surface.
As shown in Fig. 2 light guide plate 104 includes optical grade sheet material 109 and is arranged on the guide-lighting net of 104 lower surface of light guide plate
Point.Light directing site is made up of the multiple light guiding points 110 into array arrangement.At least a portion light guiding points 110 include wavelength convert unit
Part 112.Wavelength changing element 112 is evenly distributed in light directing site.In the embodiment shown in figure 2, all light guiding points
110 all include Wavelength changing element 112.
Wavelength changing element 112 includes but is not limited to the mixed of quantum dot 114, fluorescent material or quantum dot 114 and fluorescent material
Compound.In one preferred embodiment, as shown in figure 3, light guiding points 110 are the dispersed matrix material for having quantum dot 114
Material 115.Matrix material 115 includes but is not limited to monomer, polymer and glass.Preferably, also include diffusion in matrix material 115
Particle.The preferred thickness range of matrix material 115 is 1 micron -1000 microns.Quantum dot 114 is red light quantum point and green glow amount
The mixture of son point.
Quantum dot 114 is point source, and emission spectrum is produced after being excited, and emission spectrum diffuses to form a light to surrounding
Source.Using the diffusion light source feature of quantum dot 114, which is combined with the light directing site of light guide plate 104, formed a kind of new leaded light
Plate 104.
Quantum dot 114 includes at least one in following compound：II races-Group VIA compound (refer in particular to by II races element with
The elementary composition compound of Group VIA), IV races-Group VIA compound (are refered in particular to by the elementary composition chemical combination of IV races element and Group VIA
Thing), III-VA compounds of group (refering in particular to by the elementary composition compound of group-III element and VA races), I races-Group VIA compound
(refering in particular to by I races element and the elementary composition compound of Group VIA).114 structure of quantum dot including but not limited to has above-claimed cpd
The core of composition, nucleocapsid structure, alloy or graded alloy structure.Preferably, quantum dot 114 is cadmium selenide/zinc sulfide or phosphorus
Change indium/zinc sulfide.
In a preferred embodiment, Wavelength changing element 112 is the dispersed macromolecule material for having quantum dot 114
Material, macromolecular material include but is not limited to epoxy resin, polysiloxanes, acrylic polymer, glass, carbonic acid lipid aggregate thing
At least one of the selection in the group constituted with the mixture of above-mentioned material.
In one preferred embodiment, as shown in figure 4, light directing site is formed in by way of printing or printing
The lower surface of light guide plate 104.Each light guiding points 110 includes Wavelength changing element 112.The enlarged drawing of the light guiding points 110 in Fig. 4
As shown in Figure 9.The shape of light guiding points 110 is including but not limited to cylindric shown in Fig. 4, also including other shapes such as lenticule shape
Shape.The shape of specific light guiding points 110 can be designed as needed.
In one preferred embodiment, light directing site is the guide-lighting ink for being printed on 104 lower surface of light guide plate, guide-lighting
It is dispersed in ink to have quantum dot 114.After printing, guide-lighting ink 113 forms the dispersed matrix material 115 for having quantum dot.
Also include other guide-lighting particles in matrix material 115.
In one preferred embodiment, as shown in figure 5, the light directing site of light guide plate 104 is by printing or prints
Mode be formed on substrate 118, the lower surface of substrate 118 and optical grade sheet material 109 is by transparent colloid bonding.Guide-lighting net
Adhesive surface or the back side of adhesive surface of the point positioned at substrate 118 and optical grade sheet material 109.Substrate 118 material composition including but
It is not limited to the mixture of epoxy resin, polysiloxanes, acrylic polymer, glass, carbonic acid lipid aggregate thing and above-mentioned material
At least one of the selection in the group of composition.
In one preferred embodiment, as shown in fig. 6, light directing site includes being arranged on 104 lower surface of light guide plate
Micro structure 116 and the Wavelength changing element 112 being arranged in micro structure 116.Wavelength changing element 112 is arranged on micro structure 116
Surface.Each light guiding points 110 includes a micro structure 116.Micro structure 116 includes but is not limited to microlens structure, its
It disclosure satisfy that the micro structure of light diffusion effect all in protection domain of the present utility model.Wavelength changing element 112 is uniform
It is dispersed with the matrix material 115 of quantum dot 114.The enlarged drawing of the Wavelength changing element 112 in Fig. 6 is as shown in Figure 10.
In a preferred embodiment, micro structure 116 is the small groove for being arranged on 104 lower surface of light guide plate, recessed
Wavelength changing element 112 is filled with groove.The shape of groove includes but is not limited to lens shaped, cone, triangular prism shaped, other energy
Enough meet the micro structure of light diffusion effect all in protection domain of the present utility model.
In one preferred embodiment, as shown in fig. 7, light directing site is the micro structure for being arranged on light guide plate lower surface
116, Wavelength changing element 112 is filled with micro structure 116,112 surface of Wavelength changing element is additionally provided with sealing member 120.Institute
The unification of sealing member 120 for having micro structure 116 is an entirety, is fitted in the lower surface of light guide plate 104.Sealing member 120 include but
It is not limited to the mixture of epoxy resin, polysiloxanes, acrylic polymer, glass, carbonic acid lipid aggregate thing and above-mentioned material
At least one of the selection in the group of composition.Certainly, each micro structure 116 can also arrange a sealing member 120.
In one preferred embodiment, as shown in figure 8, light guide plate 104 includes being arranged on 109 following table of optical grade sheet material
The substrate 118 in face, the groove being arranged in substrate 118, Wavelength changing element 112 in a groove is set and substrate is arranged on
The sealing member 120 on 118 surfaces.Single groove and the Wavelength changing element 112 for arranging in a groove constitute a light guiding points
110.It is bonding by transparent colloid between substrate 118 and optical grade sheet material 109, sealing member 120.
In one preferred embodiment, in the light directing site of light guide plate 104, only some light guiding points 110 includes
Wavelength changing element 112.Including the light guiding points 110 and light guiding points not including Wavelength changing element 112 of Wavelength changing element 112
110 are interspersed.By controlling the distribution of light directing site, density and size, control light guide plate and go out the color of light, brightness and
Evenness.
In one preferred embodiment, light directing site is the guide-lighting ink for being printed on 104 lower surface of light guide plate, one
Quantum dot 114, the amount of not containing in the guide-lighting ink of another part light guiding points 110 are dispersed with the guide-lighting ink for dividing light guiding points 110
Son point 114.It is interspersed including the guide-lighting ink and the guide-lighting ink not including quantum dot 114 of quantum dot 114.Led by control
The distribution of light ink, density and size, control color, brightness and the uniformity that light guide plate goes out light.
In one preferred embodiment, light directing site includes the small groove 118 for being arranged on light guide plate lower surface,
Wavelength changing element 112 is filled with the groove of a part of light guiding points 110, is not filled with the groove of another part light guiding points 110
There is Wavelength changing element 112.Including the light guiding points 110 and leaded light not including Wavelength changing element 112 of Wavelength changing element 112
Point 110 is interspersed.By controlling the distribution of light directing site, density and size, control light guide plate go out the color of light, brightness and
The uniformity.
In one preferred embodiment, the exiting surface 108 of light guide plate 104 is provided with microlens array 122, such as Figure 11
It is shown.Light directing site is the small groove 118 for being arranged on 104 lower surface of light guide plate, filled with wavelength convert unit in groove 118
Part 112, the notch of groove 118 are additionally provided with sealing member 120.Microlens array 122 will reduce the total reflection effect of exiting surface 108
Should, increase light emission rate.Microlens array 122 also has the effect of blast.Another preferred embodiment in, light guide plate
104 exiting surface 108 is provided with prism structure.Most of incident illumination is reflected by prism structure upwards, reaches the effect of blast.Rib
Mirror structure can also reduce the total reflection effect of exiting surface 108.
In one preferred embodiment, the lower surface of light guide plate 104 is provided with one layer of height for being dispersed with quantum dot 114
Molecular material.Quantum dot 114 is the light directing site of 104 lower surface of light guide plate.Using the light diffusion effect of quantum dot 114 make into
The lower surface that light is penetrated in light guide plate 104 produces scattering and diffusion.Preferably, polymer surface is provided with sealing member 120.It is excellent
Selection of land, is also dispersed with diffusion particle in macromolecular material.
In one preferred embodiment, as shown in figure 12, the density near the light directing site of incidence surface 106 is less,
It is larger away from the density of the light directing site of incidence surface 106.In one preferred embodiment, near the leaded light of incidence surface 106
The size of site is less, larger away from the size of the light directing site of incidence surface 106.This utility model can be by controlling light directing site
Density and size, control color, brightness and the uniformity that light guide plate 104 goes out light.
Although inventor has done elaboration in greater detail and has enumerated to the technical solution of the utility model, it will be appreciated that
To those skilled in the art, above-described embodiment is modified and/or flexible or using equivalent replacement scheme is
Obvious, can not all depart from the essence of this utility model spirit, the term occurred in this utility model is for this utility model
The elaboration and understanding of technical scheme, can not be constituted to restriction of the present utility model.
Claims (10)
1. a kind of light guide plate, including upper surface, lower surface and side, the upper surface are exiting surface, and the lower surface is provided with
The light directing site being made up of multiple light guiding points, it is characterised in that at least a portion light guiding points include Wavelength changing element.
2. light guide plate according to claim 1, it is characterised in that：The Wavelength changing element includes quantum dot, fluorescent material
Or the mixture of the two.
3. light guide plate according to claim 2, it is characterised in that：The Wavelength changing element be quantum dot, the quantum
Point is dispersed in macromolecular material.
4. light guide plate according to claim 1, it is characterised in that：The lower surface of the light guide plate is provided with substrate, described
Light directing site is arranged on the substrate.
5. the light guide plate according to claim 1 or 4, it is characterised in that：The light directing site is formed by guide-lighting ink,
The guide-lighting ink includes the Wavelength changing element.
6. the light guide plate according to claim 1 or 4, it is characterised in that：The light directing site includes micro structure, micro- knot
Structure surface is provided with the Wavelength changing element.
7. light guide plate according to claim 6, it is characterised in that：The surface of the Wavelength changing element is provided with sealing
Part.
8. light guide plate according to claim 1, it is characterised in that：The light guide plate includes incidence surface, the incidence surface position
In the side of the light guide plate, the density and size near the light directing site of the incidence surface is less, away from it is described enter light
The density and size of the light directing site in face is larger.
9. a kind of back light unit, it is characterised in that including luminescent device and the light guide plate as described in arbitrary in claim 1-8.
10. a kind of display device, it is characterised in that including back light unit as claimed in claim 9 and be used for display image
Image panel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301607 | 2016-04-12 | ||
| CN2016203016078 | 2016-04-12 |
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| Publication Number | Publication Date |
|---|---|
| CN206114945U true CN206114945U (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620724480.0U Active CN206114945U (en) | 2016-04-12 | 2016-07-11 | New light guide plate, Backlight unit and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929480A (en) * | 2016-04-12 | 2016-09-07 | 苏州星烁纳米科技有限公司 | Novel light guide plate and application thereof |
| WO2018120849A1 (en) * | 2016-12-31 | 2018-07-05 | 惠科股份有限公司 | Method of manufacturing backlight module |
| WO2018120502A1 (en) * | 2016-12-31 | 2018-07-05 | 惠科股份有限公司 | Backlight module and display device |
| CN108873147A (en) * | 2018-06-25 | 2018-11-23 | 福州大学 | A kind of quantum dot light guide plate and preparation method thereof |
-
2016
- 2016-07-11 CN CN201620724480.0U patent/CN206114945U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929480A (en) * | 2016-04-12 | 2016-09-07 | 苏州星烁纳米科技有限公司 | Novel light guide plate and application thereof |
| WO2018120849A1 (en) * | 2016-12-31 | 2018-07-05 | 惠科股份有限公司 | Method of manufacturing backlight module |
| WO2018120502A1 (en) * | 2016-12-31 | 2018-07-05 | 惠科股份有限公司 | Backlight module and display device |
| CN108873147A (en) * | 2018-06-25 | 2018-11-23 | 福州大学 | A kind of quantum dot light guide plate and preparation method thereof |
| CN108873147B (en) * | 2018-06-25 | 2019-09-13 | 福州大学 | A kind of quantum dot light guide plate and preparation method thereof |
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