CN106199819B - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN106199819B CN106199819B CN201610875803.0A CN201610875803A CN106199819B CN 106199819 B CN106199819 B CN 106199819B CN 201610875803 A CN201610875803 A CN 201610875803A CN 106199819 B CN106199819 B CN 106199819B
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- light guide
- transparent material
- light
- material layer
- backlight module
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The embodiment of the present invention provides a kind of backlight module and display device, is related to technical field of liquid crystal display, can solve the problems, such as that colour cast caused by traditional dot light guide plate is uncontrollable, and may insure that light guide plate colour cast is uniform.The backlight module includes light guide plate and the backlight that the light guide plate side is arranged in, and the light guide plate includes light guide body and the transparent material layer that is arranged on light guide body light emission side surface；Wherein, the light guide body is different with the refractive index of the transparent material layer, and the thickness of the transparent material layer is gradually reduced Zi close to the backlight side to far from the backlight side.For liquid crystal display device.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of backlight module and display devices.
Background technique
Currently, liquid crystal display device (Liquid Crystal Display, abbreviation LCD) is widely used to various electronics
In product, due to liquid crystal display panel therein itself and do not have light-emitting function, therefore, it is necessary to provide for liquid crystal display panel
The backlight module of light source.
Wherein, light guide plate is a very important component in backlight module, for point light source or linear light source to be converted into
Area source.Traditional light guide plate is to process lattice point structure in light guide plate lower surface to destroy by the modes such as radium-shine in production
The total reflection of light beam projects light beam in light guide plate upper surface.However, radium-shine processing method has randomness, site
It will form the unstability that volcano mouth structure causes processing, it is unstable to allow for the lattice point structure to be formed in this way, so as to cause shape
At light guide plate colour cast it is uncontrollable.In addition, the structure of each site may have difference in process on light guide plate, from
And the colour cast that will lead to light guide plate different location is different.
Summary of the invention
The embodiment of the present invention provides a kind of backlight module and display device, can solve color caused by traditional dot light guide plate
Partially uncontrollable problem, and may insure that light guide plate colour cast is uniform.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
On the one hand, a kind of backlight module is provided, it is described including light guide plate and the backlight that the light guide plate side is arranged in
Light guide plate includes light guide body and the transparent material layer that is arranged on light guide body light emission side surface；Wherein, the leaded light
Ontology is different with the refractive index of the transparent material layer, and the thickness of the transparent material layer is Zi the close backlight side to far
It is gradually reduced from the backlight side.
Preferably, the light-emitting surface of the transparent material layer is inclined flat relative to light guide body light emission side surface
Face.
Preferably, the shape of the light guide body is wedge shape.
Preferably, the light guide plate further includes the first lenticule battle array being arranged on transparent material layer light emission side surface
Column.
It is further preferred that first microlens array is by multiple graininess lenticule groups arranged along two-dimensional directional
At or first microlens array by it is multiple along one-dimensional square arrange strip lenticules form.
Preferably, the material of the light guide body is polycarbonate, polymethyl methacrylate and methyl methacrylate-
The mixture of styrol copolymer.
Preferably, the backlight module further includes the diffusion sheet that the light guide plate light emission side is arranged in.
It is further preferred that the backlight module further includes the second lenticule battle array being arranged on the diffusion sheet surface
Column.
Preferably, the backlight module further includes reflector plate；The reflector plate is for surrounding the light guide plate except incident side
Remaining surface other than surface and light emission side surface.
On the other hand, a kind of display device, including backlight module and display panel are provided, the backlight module is above-mentioned
Backlight module.
It includes light guide plate that the embodiment of the present invention, which provides a kind of backlight module and display device, backlight module, and light guide plate includes
Light guide body and the transparent material layer being arranged on light guide body light emission side surface, and the thickness of transparent material layer is from close to backlight
Lamp side is gradually reduced to far from backlight side.Since the refractive index of transparent material layer is greater than the refractive index of air, light
The cirtical angle of total reflection for being incident to transparent material layer from light guide body increases, so that more light can enter from light guide body
It is incident upon transparent material layer.On this basis, since the thickness of transparent material layer is Zi close to backlight side to separate backlight one
Side is gradually reduced, thus the angle by adjusting the face contacted in transparent material layer light-emitting surface and transparent material layer with light guide body
(light-emitting surface of transparent material layer is the curvature of (light-emitting surface of transparent material layer be inclined plane) or transparent material layer light-emitting surface
Curved surface), it can go out from light guide plate to increase so that the incident light of certain angle for injecting transparent material layer is emitted to air
The brightness for the light penetrated.On the one hand, relative to any structure is not provided in light guide body, the embodiment of the present invention is set in light guide body
The brightness for the light being emitted from light guide plate can be increased by setting transparent material layer；On the other hand, relative to net is arranged in light guide body
Point structure, since transparent material layer being arranged in light guide body, and the colour cast of transparent material layer is determining, and transparent material layer is each
The colour cast of a position is identical, thus colour cast caused by light guide plate can control, and light guide plate colour cast is uniform.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 (a) is a kind of structural schematic diagram one of backlight module provided in an embodiment of the present invention；
Fig. 1 (b) is a kind of structural schematic diagram two of backlight module provided in an embodiment of the present invention；
Fig. 1 (c) is a kind of structural schematic diagram three of backlight module provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of the light guide body of wedge shape provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram four of backlight module provided in an embodiment of the present invention；
Fig. 4 (a) is the structural schematic diagram one that a kind of light guide plate provided in an embodiment of the present invention includes the first micro structure array；
Fig. 4 (b) is the structural schematic diagram two that a kind of light guide plate provided in an embodiment of the present invention includes the first micro structure array；
Fig. 5 (a) is a kind of structural schematic diagram five of backlight module provided in an embodiment of the present invention；
Fig. 5 (b) is a kind of structural schematic diagram six of backlight module provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram seven of backlight module provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram one of display device provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram two of display device provided in an embodiment of the present invention.
Appended drawing reference:
10- light guide plate；101- light guide body；102- transparent material layer；The first microlens array of 103-；20- backlight；
30- diffusion sheet；The second microlens array of 301-；40- reflector plate；The other optical film materials of 50-；60- display panel.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Lattice point structure is generally arranged in light guide plate in the prior art in light guide body, to ensure the light being emitted from light guide plate
Transmitance, but radium-shine processing method formed lattice point structure it is unstable, be easy to cause the colour cast of light guide plate uncontrollable and
Colour cast is uneven.If but lattice point structure is not provided in light guide body, incident light is after entering light guide body inside, from leaded light
When ontology is incident on air, when incident angle very little, will be totally reflected, can not be from light guide body so as to cause most of light
Outgoing.Specifically, being PMMA (polymethyl methacrylate, polymethyl methacrylate) with the material of light guide body
For be illustrated, the refractive index of PMMA is 1.48, and the refractive index of air is 1.
According to total reflection formula: nPMMA×sin(θPMMA)=nAir×sin90°
θPMMA=arcsin (1/1.48)=42.51 °
Wherein, θPMMAThe incidence angle in air, n are incident on from light guide body for lightPMMAFor the refractive index of PMMA, nAirFor sky
The refractive index of gas.
It can be seen that according to above-mentioned calculation formula when light enters from light guide body (by taking the material of light guide body is PMMA as an example)
It is mapped to the angle, θ of airPMMAAt≤42.51 °, light can just be injected in air from the surface of PMMA, in this way so as to cause from back
After the luminous light of light lamp enters light guide body, most of light can not be projected from light guide body.
Based on above-mentioned, the embodiment of the present invention provides a kind of backlight module, as shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c),
Including light guide plate 10 and the backlight 20 that 10 side of light guide plate is arranged in, light guide plate 10 includes that light guide body 101 and setting are being led
Transparent material layer 102 on 101 light emission side surface of trimmed book body；Wherein, the refractive index of light guide body 101 and transparent material layer 102
The thickness of difference, transparent material layer 102 is gradually reduced Zi close to 20 side of backlight to far from 20 side of backlight.
It should be noted that first, for light guide body 101 material without limiting, to be penetrated with good light
Subject to property.In addition, for light guide body 101 shape without limiting, can be as Fig. 1 (a) show it is plate shaped, can also be with
It is that Fig. 1 (b) and Fig. 1 (c) such as show wedge shape.When the shape of light guide body 101 is wedge shape, due to the light guide body of wedge shape
101 effect be in order to make from backlight 20 issue light emission enter light guide body 101 after, be emitted to from light guide body 101 transparent
Incidence angle when material layer 102 reduces, thus the light guide body 101 of wedge shape can be as shown in Fig. 1 (b), will be vertical with side
Face as light-emitting surface, be also possible to as shown in Fig. 1 (c), using the opposite face in the face vertical with side as light-emitting surface.
Second, the quantity for the sub- transparent material layer for including for transparent material layer 102 can only include one without limiting
Straton transparent material layer also may include the sub- transparent material layer of multilayer (with transparent material layer 102 in description of the invention attached drawing
Including being illustrated for a straton transparent material layer).As long as the thickness for the transparent material layer 102 being made of sub- transparent material layer
It is gradually reduced from close to 20 side of backlight to far from 20 side of backlight.In 10 actual design process of light guide plate, it is
Reduce the thickness of light guide plate 10, thus the number of plies for the sub- transparent material layer being arranged in light guide body 101 should not be excessive, it should be in conjunction with real
The number of plies for needing to rationally design sub- transparent material layer on border.
When transparent material layer 102 includes the sub- transparent material layer of multilayer, each straton transparent material layer light-emitting surface and with go out
The angle in the opposite face of smooth surface may be the same or different.On this basis, when transparent material layer 102 includes that multilayer is saturating
When bright material layer, the biggish side of thickness should be close to backlight 20 in each straton transparent material layer, and the lesser side of thickness is answered
Far from backlight 20.In addition, can pass through when the transparent material layer including multilayer of transparent material layer 102 and adjust each straton
The angle of transparent material layer light-emitting surface and the face opposite with light-emitting surface, so that the light-emitting surface of finally obtained transparent material layer 102
It meets the requirements with the angle in the face contacted in transparent material layer 102 with light guide body 101.
The light-emitting surface of third, transparent material layer 102 can be curved surface, be also possible to an inclined plane, as long as meeting
The thickness of transparent material layer 102 is gradually reduced Zi close to 20 side of backlight to far from 20 side of backlight.
On this basis, when the light-emitting surface of transparent material layer 102 is an inclined plane, for transparent material layer
The angle in the face contacted in 102 light-emitting surface and transparent material layer 102 with light guide body 101 is without limiting, as long as can ensure that
Light can be emitted to air from transparent material layer 102.Similarly, when the light-emitting surface of transparent material layer 102 is curved surface, for
The curvature of curved surface is without limiting, as long as can ensure that light can be emitted to air from transparent material layer 102.
It is below an inclined plane with the light-emitting surface of transparent material layer 102, and transparent material layer as shown in Fig. 1 (a)
102 including being described in detail how transparent material layer 102 makes the light being emitted from light guide body 101 for a straton transparent material layer
Directive air.
When setting transparent material layer layer 102, the folding of the transparent material layer 102 on 101 light emission side surface of light guide body
Penetrating rate is n, and the refractive index of light guide body 101 is nPMMAWhen (by taking the material of light guide body 101 is PMMA as an example), according to total reflection
Formula: nPMMA×sin(θPMMA)=n × sin90 °, since the refractive index of air in nature is minimum, thus transparent material layer 102
Refractive index n be naturally larger than 1, according to above-mentioned total reflection formula, then light is injected transparent material layer 102 from light guide body 101 and is occurred
The critical angle of total reflection is greater than light and is injected into the critical angle that air is totally reflected from light guide body 101, therefore relative to leading
101 surface of trimmed book body is not provided with any structure, and transparent material layer 102 is arranged on 101 light emission side surface of light guide body, can increase
The brightness for the light being emitted from light guide body 101.
Exemplary, if the material of light guide body 101 is PMMA, the refractive index of refractive index 1.48, transparent material layer 102 is
1.4, according to total reflection formula, cirtical angle of total reflection when light is incident to transparent material layer 102 from light guide body 101 is α, according to
Total reflection formula: α=1.4 1.48 × sin × sin90 °, by can be calculated: α=71.07 °；Light is incident from light guide body 101
Cirtical angle of total reflection when to air is β, according to total reflection formula: β=1 1.48 × sin × sin90 °, by can be calculated: β
=42.51 °.Due to 71.07 ° 42.51 ° of >, i.e., total reflection when light is incident to transparent material layer 102 from light guide body 101 is faced
Boundary angle is greater than cirtical angle of total reflection when light is incident to air from light guide body 101, therefore when in 101 light emission side table of light guide body
When transparent material layer 102 is arranged in face, the corresponding light of the cirtical angle of total reflection can be from leaded light when being incident to air from light guide body 101
Ontology 101 is emitted to transparent material layer 102.
Based on above-mentioned, critical angle when light is incident to air from transparent material layer 102 is γ, according to total reflection formula: 1.4
γ=1 × sin × sin90 °, γ=45.58 °.If in the light-emitting surface and transparent material layer 102 of transparent material layer 102 with leaded light
The face that ontology 101 contacts be it is parallel, then be greater than light from transparent material due to being incident to the incidence angle of air from transparent material layer 102
The bed of material 102 is incident to critical angle when air, thus light can not be emitted from transparent material layer 102.And in the embodiment of the present invention, by
It is gradually reduced Zi close to 20 side of backlight to far from 20 side of backlight in the thickness of transparent material layer 102, i.e. transparent material
It is nonparallel between the face contacted in the light-emitting surface and transparent material layer 102 of layer 102 with light guide body 101, so that from
Light guide body 101 is emitted to the light of transparent material layer 102, and when being emitted to air from transparent material layer 102, incidence angle is less than light
Critical angle gamma when being incident to air from transparent material layer 102, such light can be emitted to air from transparent material layer 102,
So that further sky can be emitted to from transparent material layer 102 from the light that light guide body 101 injects transparent material layer 102
Gas improves the brightness for the light being emitted from light guide plate 10.
When the light-emitting surface of transparent material layer 102 is curved surface, by the adjusting of transparent material layer 102, make from light guide body
Process from the light emissions of 101 outgoing to air and the light-emitting surface of transparent material layer 102 for an inclined plane when process it is identical,
Details are not described herein again.
4th, for selection transparent material layer 102 material without limit.On this basis, transparent material layer 102
It can directly be attached in light guide body 101 or transparent material layer 102 is placed in light guide body 101, then pass through other portions
Part is fixed by transparent material layer 102 and light guide body 101.
5th, for light guide body 101 and transparent material layer 102 thickness without limit, can according to need progress
Rationally setting.On this basis, light guide body 101 is different with the refractive index of transparent material layer 102, can be light guide body 101
Refractive index be greater than transparent material layer 102 refractive index, be also possible to transparent material layer 102 refractive index be greater than light guide body
101 refractive index.
The embodiment of the present invention provides a kind of backlight module, and backlight module includes light guide plate 10, and light guide plate 10 includes guide-lighting sheet
Body 101 and the transparent material layer 102 being arranged on 101 light emission side surface of light guide body, and the thickness of transparent material layer 102 leans on certainly
Nearly 20 side of backlight is gradually reduced to far from 20 side of backlight.Since the refractive index of transparent material layer 102 is greater than air
Refractive index, therefore light increases from the cirtical angle of total reflection that light guide body 101 is incident to transparent material layer 102, so that more
Light can be incident to transparent material layer 102 from light guide body 101.On this basis, certainly due to the thickness of transparent material layer 102
Arrive close to 20 side of backlight and be gradually reduced far from 20 side of backlight, thus by adjust 102 light-emitting surface of transparent material layer with
The angle (light-emitting surface of transparent material layer 102 is inclined plane) in the face contacted in transparent material layer 102 with light guide body 101
Or the curvature (light-emitting surface of transparent material layer 102 is curved surface) of 102 light-emitting surface of transparent material layer, it can be so as to inject transparent material
The incident light of the certain angle of layer 102 is emitted to air, to increase the brightness for the light being emitted from light guide plate 10.On the one hand,
Relative to any structure is not provided in light guide body 101, transparent material layer is arranged in light guide body 101 in the embodiment of the present invention
102 can increase the brightness for the light being emitted from light guide plate 10；On the other hand, relative to the setting site knot in light guide body 101
Structure, since transparent material layer 102 being arranged in light guide body 101, and the colour cast of transparent material layer 102 is determining, and transparent material
The colour cast of each position of the bed of material 102 is identical, thus colour cast caused by light guide plate 10 can control, and 10 color of light guide plate
Partially uniformly.
Preferably, as shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c), the light-emitting surface of transparent material layer 102 is relative to leading
The 101 inclined plane in light emission side surface of trimmed book body.
The embodiment of the present invention, if the light-emitting surface of transparent material layer 102 is arranged relative to 101 light emission side surface of light guide body
For curved surface, since curved surface will increase manufacture craft difficulty relative to plane, the embodiment of the present invention, transparent material layer 102
Light-emitting surface is relative to the 101 inclined plane in light emission side surface of light guide body, to simplify the manufacture craft difficulty of backlight module.
Preferably, as shown in Fig. 1 (b), Fig. 1 (c) and Fig. 2, the shape of light guide body 101 is wedge shape.
Wherein, light guide body 101 can be divided into plate and wedge shape by shape.Wedge shape refers to that the thickness of light guide body 101 is
It is approached while thickness.
It should be noted that, by the multiple reflections in light guide body 101, entering when light is incident in light guide body 101
The angle for being mapped to the incident light of 101 upper surface of light guide body can reduce.Specifically, as shown in Fig. 2, from backlight issue light with
The angle of the incident light of 101 upper surface of light guide body is incident on by two secondary reflections in the upper surface of 1 jiao of α injection light guide body 101
Degree becomes α 2,2 < α 1 of α.
The embodiment of the present invention, when the shape of light guide body 101 is wedge shape, light guide body 101 of the light by wedge shape, in wedge
It can be reflected in the light guide body 101 of shape, so that the angle for the incident light for being incident on transparent material layer 102 can be made to become smaller,
And the incident light of low-angle is less likely to occur to be totally reflected, so as to increase the brightness for the light being emitted from light guide body 101.
Preferably, as shown in figure 3, light guide plate 10 further includes first be arranged on 102 light emission side surface of transparent material layer
Microlens array 103.
Wherein, for the shape of the first lenticule in the first microlens array 103 without limiting, if be conducive to make from
The light being emitted in light guide body 101 and transparent material layer 102 is uniform.
Herein, the first microlens array 103 can be integrally formed with transparent material layer 102, can also be respectively separately formed.
If the first microlens array 103 and transparent material layer 102 are separately formed, can be attached to after the molding of the first lenticule
On transparent material layer 102.
The embodiment of the present invention, since the first microlens array 103 has the function of even light, thus in transparent material layer 102
First microlens array 103 is set on light emission side surface, it can be ensured that is emitted from light guide body 101 and transparent material layer 102
Uniformity of the light after the first microlens array 103.
It is further preferred that the first microlens array 103 is by multiple particles arranged along two-dimensional directional as shown in Fig. 4 (a)
Shape lenticule composition, or as shown in Fig. 4 (b), the first microlens array 103 is micro- by multiple strips arranged along one-dimensional square
Microscope group at.
In order to make the light being emitted from transparent material layer 102 after the first microlens array 103, light can be uniformly dispersed,
It is preferred that the surface of the first lenticule is circular arc type.That is, when the first microlens array 103 is by multiple particles along two-dimensional directional arrangement
When shape lenticule forms, the shape of lenticule is hemispherical；When the first microlens array 103 by it is multiple along one-dimensional square arrangement
When strip lenticule forms, the shape of lenticule is the semicolumn bodily form.
Wherein, between graininess lenticule in the first microlens array 103 spacing and strip lenticule between
Spacing without limit, can according to need and be configured.
The embodiment of the present invention, since the first microlens array 103 is made of multiple graininess lenticules or by multiple
Shape lenticule composition, thus can act as the effect of even light, to keep the light being emitted from the first microlens array 103 more equal
It is even.
Preferably, the material of light guide body 101 is polycarbonate (Polycarbonate, abbreviation PC), polymethylacrylic acid
Methyl esters (PMMA) and copolymer of methyl methacrylatestyrene (Methyl methacrylate-styrene
Copolymer, abbreviation MS) mixture.
Wherein, PMMA is a kind of thermoplastic, has splendid weatherability, higher surface hardness, preferable anti-impact
It hits characteristic, good processing performance and high transparency, light transmittance and is up to 91%~93%, it is seen that light transmission rate 99%,
Ultraviolet light transmittance 70%, and it is light-weight.
PC is a kind of line style carbonic acid polyester, and carbonic acid group is alternately arranged with other groups in molecule, these groups can be with
It is aromatic series, is also possible to aliphatic, is also possible to both have.PC is the amorphous polymer of almost colourless glassy state,
Have optical well, and PC macromolecule resin has very high toughness.
MS polymer has the characteristics that excellent translucency, optical, weatherability is good, easy to process, cost is cheap.
Herein, when the material of light guide body 101 is the mixture of PC, PMMA and MS, for PC, PMMA in mixture
And ratio shared by MS can according to need and be adjusted without limiting.
The embodiment of the present invention, when the material of light guide body 101 is polycarbonate, polymethyl methacrylate and metering system
When the mixture of sour methyl esters-styrol copolymer, the photopermeability with higher of light guide body 101 of formation and good modeling
Toughness.
Preferably, as shown in Fig. 5 (a) and Fig. 5 (b), backlight module further includes the diffusion that 10 light emission side of light guide plate is arranged in
Piece 30.
Wherein, the material for diffusion sheet 30 and structure are without limiting, as long as light can form one after diffusion sheet 30
A uniform area source.The substrate material of diffusion sheet 30 can for example choose the higher PET of light transmission rate
(Polyetiylenterephthalate, polyethylene terephthalate)/PC/PMMA.Further, it is also possible in diffusion sheet 30
Substrate material in some chemical particles are added as scattering particles, light can be constantly different in refractive index when passing through diffusion sheet 30
It is passed through in medium, while many refractions, reflection and scattering phenomenon can occur, to light be spread, to play the work for widening visual angle
With.
Herein, diffusion sheet 30 can be upper diffusion sheet, or lower diffusion sheet.When diffusion sheet 30 is upper diffusion sheet,
Answer light transmission rate with higher；When diffusion sheet 30 is lower diffusion sheet, mist degree with higher is answered.
Since backlight module provided in an embodiment of the present invention further includes the diffusion sheet 30 that 10 light emission side of light guide plate is arranged in, and
Diffusion sheet 30 can further make the light issued from light guide plate 10 uniform, to improve the uniform of the light issued from backlight module
Property.
Preferably, as shown in Fig. 5 (b), backlight module further includes the second lenticule battle array being arranged on 30 surface of diffusion sheet
Column 301.
Wherein, the second microlens array 301 can be set in diffusion sheet 30 close to the side of transparent material layer 102, can also
Side of the diffusion sheet 30 far from transparent material layer 102 is arranged in (to be arranged in diffusion sheet 30 far from transparent material in attached drawing 5 (b)
Illustrated for the side of the bed of material 102).
Herein, the second microlens array 301 can be integrally formed with diffusion sheet 30, be also possible to the second microlens array
It is attached on diffusion sheet 30 after 301 moldings.On this basis, for the second lenticule in the second microlens array 301
For shape without limiting, the shape of the second lenticule can be identical with the shape of the first lenticule, can also be different.
It should be noted that when the second microlens array 301 is arranged on 30 surface of diffusion sheet, it can be in transparent material
First microlens array 103 is set on layer 102, the first microlens array 103 can also be not provided with.
The second microlens array 301 is arranged in the embodiment of the present invention on 30 surface of diffusion sheet, can further make from backlight
The light that mould group issues is more evenly.
Preferably, as shown in Fig. 6, Fig. 7 and Fig. 8, backlight module further includes reflector plate 40；Reflector plate 40 is led for surrounding
Remaining surface of the tabula rasa 10 in addition to incident side surface and light emission side surface.
Wherein, for the material of reflector plate 40 without limiting, the material of reflector plate 40 should be chosen with high reflectance
Material.Such as Ag (silver), Cu (copper) or poly carbonate resin composition etc..In addition, reflector plate 40 may include a tunic or
Multilayer film.
Herein, reflector plate 40 is used to enter back into unscattered light source reflection in light conducting region, to improve the utilization of light
Rate.
The embodiment of the present invention, it is anti-in remaining surface setting of the light guide plate 10 in addition to incident side surface and light emission side surface
Piece 40 is penetrated, can effectively improve the utilization rate of light.
Based on above-mentioned, backlight module can also be as shown in Figure 7 and Figure 8, including other optical film materials 50, when diffusion sheet 30 is
When lower diffusion sheet, the light emission side of diffusion sheet 30 is arranged in other optical film materials 50, and other optical film materials 50 for example may include rib
Eyeglass, upper diffusion sheet etc.；When diffusion sheet 30 is upper diffusion sheet, other optical film materials 50 are arranged in diffusion sheet 30 and light guide plate 10
Between, other optical film materials 50 are such as may include prismatic lens, lower diffusion sheet.Prismatic lens are for concentrating on the light of dispersion
It is projected in a certain range, to improve the brightness of light within the scope of this.
The embodiment of the present invention also provides a kind of display device, including backlight module and display panel 60, and backlight module is upper
The backlight module stated.
Wherein, display panel 60 includes array substrate, to box substrate and array substrate is arranged in and between box substrate
Liquid crystal layer, colored film layer can be set in array substrate, also can be set on to box substrate.Array substrate includes film crystalline substance
Body pipe and pixel electrode, thin film transistor (TFT) include grid, gate insulation layer, source electrode, drain electrode, active layer.
The embodiment of the present invention provides a kind of display device, and the backlight module of display device includes light guide plate 10, light guide plate 10
Including light guide body 101 and the transparent material layer 102 that is arranged on 101 light emission side surface of light guide body, and transparent material layer 102
Thickness be gradually reduced Zi close to 20 side of backlight to separate 20 side of backlight.Due to the refractive index of transparent material layer 102
Greater than the refractive index of air, therefore light increases from the cirtical angle of total reflection that light guide body 101 is incident to transparent material layer 102, from
And more light is allowed to be incident to transparent material layer 102 from light guide body 101.On this basis, due to transparent material layer
102 thickness is gradually reduced Zi close to 20 side of backlight to far from 20 side of backlight, thus by adjusting transparent material layer
(light-emitting surface of transparent material layer 102 is the angle in the face contacted in 102 light-emitting surfaces and transparent material layer 102 with light guide body 101
Inclined plane) or 102 light-emitting surface of transparent material layer curvature (light-emitting surface of transparent material layer 102 be curved surface), can so that
The incident light for injecting the certain angle of transparent material layer 102 is emitted to air, to increase the light being emitted from light guide plate 10
Brightness.On the one hand, relative to any structure is not provided in light guide body 101, the embodiment of the present invention is arranged in light guide body 101
Transparent material layer 102 can increase the brightness for the light being emitted from light guide plate 10；On the other hand, relative in light guide body 101
Lattice point structure is set, and since transparent material layer 102 being arranged in light guide body 101, and the colour cast of transparent material layer 102 is determining
, and the colour cast of each position of transparent material layer 102 is identical, thus colour cast caused by light guide plate 10 can control,
And 10 colour cast of light guide plate is uniform.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of backlight module, which is characterized in that described to lead including light guide plate and the backlight that the light guide plate side is arranged in
Tabula rasa includes light guide body and the transparent material layer that is arranged on light guide body light emission side surface；
Wherein, the refractive index of the light guide body and the transparent material layer is different, and the thickness of the transparent material layer is from close
The backlight side is gradually reduced to far from the backlight side；
The colour cast of each position of transparent material layer is identical.
2. backlight module according to claim 1, which is characterized in that the light-emitting surface of the transparent material layer is relative to institute
State the inclined plane in light guide body light emission side surface.
3. backlight module according to claim 1, which is characterized in that the shape of the light guide body is wedge shape.
4. backlight module according to claim 1, which is characterized in that the light guide plate further includes being arranged in the transparent material
The first microlens array on bed of material light emission side surface.
5. backlight module according to claim 4, which is characterized in that first microlens array is by multiple along two-dimensional square
It is micro- by multiple strips arranged along one-dimensional square to the graininess lenticule of arrangement composition or first microlens array
Microscope group at.
6. backlight module according to claim 1, which is characterized in that the material of the light guide body is polycarbonate, gathers
The mixture of methyl methacrylate and copolymer of methyl methacrylatestyrene.
7. backlight module according to claim 1, which is characterized in that the backlight module further includes being arranged in the leaded light
The diffusion sheet of plate light emission side.
8. backlight module according to claim 7, which is characterized in that the backlight module further includes being arranged in the diffusion
The second microlens array on piece surface.
9. backlight module according to claim 1, which is characterized in that the backlight module further includes reflector plate；
The reflector plate is for surrounding remaining surface of the light guide plate in addition to incident side surface and light emission side surface.
10. a kind of display device, including backlight module and display panel, which is characterized in that the backlight module is claim
The described in any item backlight modules of 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610875803.0A CN106199819B (en) | 2016-09-30 | 2016-09-30 | A kind of backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610875803.0A CN106199819B (en) | 2016-09-30 | 2016-09-30 | A kind of backlight module and display device |
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| CN106199819A CN106199819A (en) | 2016-12-07 |
| CN106199819B true CN106199819B (en) | 2019-07-05 |
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| CN201610875803.0A Expired - Fee Related CN106199819B (en) | 2016-09-30 | 2016-09-30 | A kind of backlight module and display device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709723A (en) * | 2019-03-15 | 2019-05-03 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display panel |
| RU2720482C1 (en) * | 2019-11-13 | 2020-04-30 | Федеральное государственное бюджетное учреждение науки Научный центр волоконной оптики Российской академии наук (НЦВО РАН) | Planar gradient optical system (versions) |
| CN113267844B (en) * | 2021-04-08 | 2022-11-22 | 马鞍山晶智科技有限公司 | Transparent one-way light-emitting light source module |
| CN114265141B (en) * | 2021-12-23 | 2023-10-03 | 武汉华星光电技术有限公司 | Light guide plate, backlight module and display device |
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| JP2001215504A (en) * | 2000-02-02 | 2001-08-10 | Rohm Co Ltd | Light guide plate, illuminating device and liquid crystal display device equipped with illumination device |
| CN1862336A (en) * | 2005-05-10 | 2006-11-15 | 中华映管股份有限公司 | Light conducting plate and backlight module |
| CN102681049A (en) * | 2012-03-12 | 2012-09-19 | 京东方科技集团股份有限公司 | Color deviation balancing film, lateral incidence type backlight module and liquid crystal display device |
| CN203519976U (en) * | 2013-10-17 | 2014-04-02 | 华映视讯（吴江）有限公司 | Transparent display |
| CN104848092A (en) * | 2015-05-22 | 2015-08-19 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565920A (en) * | 2012-02-15 | 2012-07-11 | 青岛海信电器股份有限公司 | Method for manufacturing mesh points of LGP (Light Guide Plate), LGP, backlight module and TV (Television) set |
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- 2016-09-30 CN CN201610875803.0A patent/CN106199819B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001215504A (en) * | 2000-02-02 | 2001-08-10 | Rohm Co Ltd | Light guide plate, illuminating device and liquid crystal display device equipped with illumination device |
| CN1862336A (en) * | 2005-05-10 | 2006-11-15 | 中华映管股份有限公司 | Light conducting plate and backlight module |
| CN102681049A (en) * | 2012-03-12 | 2012-09-19 | 京东方科技集团股份有限公司 | Color deviation balancing film, lateral incidence type backlight module and liquid crystal display device |
| CN203519976U (en) * | 2013-10-17 | 2014-04-02 | 华映视讯（吴江）有限公司 | Transparent display |
| CN104848092A (en) * | 2015-05-22 | 2015-08-19 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal module |
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| CN106199819A (en) | 2016-12-07 |
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