CN106199819A - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN106199819A CN106199819A CN201610875803.0A CN201610875803A CN106199819A CN 106199819 A CN106199819 A CN 106199819A CN 201610875803 A CN201610875803 A CN 201610875803A CN 106199819 A CN106199819 A CN 106199819A
- Authority
- CN
- China
- Prior art keywords
- light guide
- transparent material
- material layer
- backlight module
- guide body
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- 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, relates to technical field of liquid crystal display, it is possible to resolve the uncontrollable problem of colour cast that tradition dot light guide plate causes, and may insure that light guide plate colour cast is uniform.This backlight module includes light guide plate and is arranged on the backlight of described light guide plate side, and described light guide plate includes light guide body and the transparent material layer being arranged on described light guide body light emission side surface；Wherein, described light guide body is different with the refractive index of described transparent material layer, and the thickness of described transparent material layer is gradually reduced to away from described backlight side Zi near described backlight side.For liquid crystal indicator.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of backlight module and display device.
Background technology
At present, liquid crystal indicator (Liquid Crystal Display is called for short LCD) is widely used to various electronics
In product, owing to display panels therein itself does not have lighting function, accordingly, it would be desirable to provide for display panels
The backlight module of light source.
Wherein, light guide plate is very important parts in backlight module, for point source or line source being converted into
Area source.Traditional light guide plate, when making, is to be destroyed at light guide plate lower surface processing lattice point structure by the mode such as radium-shine
The total reflection of light beam so that light beam can penetrate at light guide plate upper surface.But, radium-shine processing mode has randomness, site
Volcanic crater structure can be formed and cause the unstability of processing, thus make the lattice point structure formed unstable, thus cause shape
The colour cast of the light guide plate become is uncontrollable.Additionally, the structure of each site may have difference in the course of processing on light guide plate, from
And the colour cast difference of light guide plate diverse location can be caused.
Summary of the invention
Embodiments of the invention provide a kind of backlight module and display device, it is possible to resolve the color that tradition dot light guide plate causes
The most uncontrollable problem, and may insure that light guide plate colour cast is uniform.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
On the one hand, it is provided that a kind of backlight module, including light guide plate and the backlight being arranged on described light guide plate side, described
Light guide plate includes light guide body and the transparent material layer being arranged on described light guide body light emission side surface；Wherein, described leaded light
Body is different with the refractive index of described transparent material layer, the thickness of described transparent material layer Zi near described backlight side to far
It is gradually reduced from described backlight side.
Preferably, the exiting surface of described transparent material layer is flat relative to what described light guide body light emission side surface tilted
Face.
Preferably, described light guide body be shaped as wedge shape.
Preferably, described light guide plate also includes the first lenticule battle array being arranged on described transparent material layer light emission side surface
Row.
It is further preferred that described first microlens array is by multiple graininess lenticule groups along two-dimensional directional arrangement
Become, or described first microlens array is made up of multiple strip lenticulees arranged along one-dimensional direction.
Preferably, the material of described light guide body be Merlon, polymethyl methacrylate and methyl methacrylate-
The mixture of styrol copolymer.
Preferably, described backlight module also includes the diffusion sheet being arranged on described light guide plate light emission side.
It is further preferred that described backlight module also includes the second lenticule battle array being arranged on described diffusion sheet surface
Row.
Preferably, described backlight module also includes reflector plate；Described reflector plate is used for surrounding described light guide plate except incident side
Remaining surface beyond surface and light emission side surface.
On the other hand, it is provided that a kind of display device, including backlight module and display floater, described backlight module is above-mentioned
Backlight module.
The embodiment of the present invention provides a kind of backlight module and display device, and backlight module includes that light guide plate, light guide plate include
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 near backlight
Lamp side is gradually reduced to away from backlight side.Refractive index due to transparent material layer is more than the refractive index of air, therefore light
The cirtical angle of total reflection 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, due to transparent material layer thickness Zi near backlight side to away from backlight one
Side is gradually reduced, thereby through the angle in the face contacted with light guide body in regulation transparent material layer exiting surface and transparent material layer
(exiting surface of transparent material layer is for (exiting surface of transparent material layer is the plane tilted) or the curvature of transparent material layer exiting surface
Curved surface), the incident illumination outgoing injecting the certain angle of transparent material layer just can be made to air, thus add and go out from light guide plate
The brightness of the light penetrated.On the one hand, relative to being not provided with any structure in light guide body, the embodiment of the present invention sets in light guide body
Put transparent material layer and can increase the brightness of the light from light guide plate outgoing；On the other hand, relative to arranging net in light guide body
Dot structure, owing to arranging transparent material layer in light guide body, and what the colour cast of transparent material layer determined that, and transparent material layer is each
The colour cast of individual position is identical, thus the colour cast that light guide plate causes can control, and light guide plate colour cast is uniform.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation one of a kind of backlight module that Fig. 1 (a) provides for the embodiment of the present invention；
The structural representation two of a kind of backlight module that Fig. 1 (b) provides for the embodiment of the present invention；
The structural representation three of a kind of backlight module that Fig. 1 (c) provides for the embodiment of the present invention；
The structural representation of the light guide body of a kind of wedge shape that Fig. 2 provides for the embodiment of the present invention；
The structural representation four of a kind of backlight module that Fig. 3 provides for the embodiment of the present invention；
Fig. 4 (a) includes the structural representation one of the first micro structure array for a kind of light guide plate that the embodiment of the present invention provides；
Fig. 4 (b) includes the structural representation two of the first micro structure array for a kind of light guide plate that the embodiment of the present invention provides；
The structural representation five of a kind of backlight module that Fig. 5 (a) provides for the embodiment of the present invention；
The structural representation six of a kind of backlight module that Fig. 5 (b) provides for the embodiment of the present invention；
The structural representation seven of a kind of backlight module that Fig. 6 provides for the embodiment of the present invention；
The structural representation one of a kind of display device that Fig. 7 provides for the embodiment of the present invention；
The structural representation two of a kind of display device that Fig. 8 provides for the embodiment of the present invention.
Reference:
10-light guide plate；101-light guide body；102-transparent material layer；103-the first microlens array；20-backlight；
30-diffusion sheet；301-the second microlens array；40-reflector plate；Other optical film material of 50-；60-display floater.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Light guide plate of the prior art typically arranges lattice point structure in light guide body, to guarantee the light from light guide plate outgoing
Transmitance, but the lattice point structure that radium-shine processing mode is formed is unstable, easily cause the colour cast of light guide plate uncontrollable and
Colour cast is uneven.If but in light guide body, it being not provided with lattice point structure, incident illumination is after entering light guide body inside, from leaded light
When body incides air, will be totally reflected when incident angle is the least, thus cause major part light cannot be from light guide body
Outgoing.Concrete, with the material of light guide body as PMMA (polymethyl methacrylate, polymethyl methacrylate)
As a example by illustrate, 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 angle of incidence air, n is incided from light guide body for lightPMMAFor the refractive index of PMMA, nAirFor sky
The refractive index of gas.
According to above-mentioned computing formula it can be seen that when light enters from light guide body (as a example by the material of light guide body is as PMMA)
It is mapped to the angle, θ of airPMMAWhen≤42.51 °, light just can inject air from the surface of PMMA, so thus result in from the back of the body
After the light entrance light guide body that light modulation is luminous, major part light cannot penetrate 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 being arranged on light guide plate 10 side, light guide plate 10 includes light guide body 101 leads with being arranged on
Transparent material layer 102 on light body 101 light emission side surface；Wherein, light guide body 101 and the refractive index of transparent material layer 102
Difference, the thickness of transparent material layer 102 is gradually reduced to away from backlight 20 side Zi near backlight 20 side.
It should be noted that first, the material for light guide body 101 is not defined, to have good light transmission
Property is as the criterion.Additionally, the shape for light guide body 101 is not defined, can be that Fig. 1 (a) such as show plate shaped, it is also possible to
It is that Fig. 1 (b) and Fig. 1 (c) such as show wedge shape.When being shaped as wedge shape of light guide body 101, due to the light guide body of wedge shape
The effect of 101 be in order to make the light sent from backlight 20 inject light guide body 101 after, from light guide body 101 outgoing to transparent
Angle of incidence during 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 exiting surface, it is also possible to be as shown in Fig. 1 (c), using face relative for the face vertical with side as exiting surface.
Second, the quantity of the sub-transparent material layer included for transparent material layer 102 is not defined, and can only include one
Straton transparent material layer, it is also possible to include that many stratons transparent material layer is (all with transparent material layer 102 in description of the invention accompanying drawing
Illustrate including as a example by a straton transparent material layer).If the thickness of the transparent material layer 102 being made up of sub-transparent material layer
It is gradually reduced to away from backlight 20 side near backlight 20 side.In light guide plate 10 actual design process, for
Reduce the thickness of light guide plate 10, thus the number of plies of the sub-transparent material layer arranged in light guide body 101 is unsuitable too much, should be in conjunction with reality
The number of plies needing the sub-transparent material layer of appropriate design on border.
When transparent material layer 102 includes many stratons transparent material layer, each straton transparent material layer exiting surface and with go out
The angle in the face that bright finish is relative can be identical, it is also possible to different.On this basis, include that many stratons are saturating when transparent material layer 102
During bright material layer, the side that in each straton transparent material layer, thickness is bigger should be near backlight 20, and the side that thickness is less should
Away from backlight 20.Additionally, when transparent material layer 102 includes many stratons transparent material layer, can be by regulating each straton
Transparent material layer exiting surface and the angle in the face relative with exiting surface, so that the exiting surface of the transparent material layer 102 finally given
Meet the requirements with the angle in the face contacted with light guide body 101 in transparent material layer 102.
3rd, the exiting surface of transparent material layer 102 can be curved surface, it is also possible to be a plane tilted, as long as meeting
The thickness of transparent material layer 102 is gradually reduced to away from backlight 20 side Zi near backlight 20 side.
On this basis, when the exiting surface of transparent material layer 102 is the plane that tilts, for transparent material layer
The exiting surface of 102 is not defined, as long as can ensure that with the angle in the face contacted with light guide body 101 in transparent material layer 102
Light can be from transparent material layer 102 outgoing to air.In like manner, when the exiting surface of transparent material layer 102 is curved surface, for
The curvature of curved surface is not defined, as long as can ensure that light can be from transparent material layer 102 outgoing to air.
As shown in Fig. 1 (a), it is the plane of an inclination below with the exiting surface of transparent material layer 102, and transparent material layer
As a example by 102 include a straton transparent material layer, describe how transparent material layer 102 makes the light from light guide body 101 outgoing in detail
Directive air.
When arranging transparent material layer layer 102 on light guide body 101 light emission side surface, the folding of this transparent material layer 102
The rate of penetrating is n, and the refractive index of light guide body 101 is nPMMATime (as a example by the material of light guide body 101 is as PMMA), according to total reflection
Formula: nPMMA×sin(θPMMA)=n × sin90 °, owing in nature, the refractive index of air 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 injected into air more than light from light guide body 101 and the critical angle of total reflection occurs, therefore relative to leading
Light body 101 surface is not provided with any structure, at light guide body 101 light emission side surface configuration transparent material layer 102, can increase
Brightness from the light of light guide body 101 outgoing.
Example, if the material of light guide body 101 is PMMA, refractive index is 1.48, and the refractive index of transparent material layer 102 is
1.4, according to total reflection formula, the light cirtical angle of total reflection when light guide body 101 is incident to transparent material layer 102 is α, according to
Total reflection formula: 1.48 × sin α=1.4 × sin90 °, by can be calculated: α=71.07 °；Light is incident from light guide body 101
It is β to cirtical angle of total reflection during air, according to total reflection formula: 1.48 × sin β=1 × sin90 °, by can be calculated: β
=42.51 °.Owing to 71.07 ° of ＞ 42.51 °, the i.e. light total reflection when light guide body 101 is incident to transparent material layer 102 is faced
Angle, boundary is more than the light cirtical angle of total reflection when light guide body 101 is incident to air, therefore when at light guide body 101 light emission side table
When face arranges transparent material layer 102, the light that the cirtical angle of total reflection is corresponding when light guide body 101 is incident to air can be from leaded light
Body 101 outgoing is to transparent material layer 102.
Based on above-mentioned, light critical angle when transparent material layer 102 is incident to air is γ, according to total reflection formula: 1.4
× sin γ=1 × sin90 °, γ=45.58 °.If with leaded light in the exiting surface of transparent material layer 102 and transparent material layer 102
The face of body 101 contact is parallel, then owing to being incident to the angle of incidence of air from transparent material layer 102 more than light from transparent material
The bed of material 102 is incident to critical angle during air, thus light cannot be from transparent material layer 102 outgoing.And in the embodiment of the present invention, by
Thickness in transparent material layer 102 is gradually reduced to away from backlight 20 side Zi near backlight 20 side, i.e. transparent material
It is nonparallel between the face contacted with light guide body 101 in the exiting surface of layer 102 and transparent material layer 102, so that from
Light guide body 101 outgoing to the light of transparent material layer 102, from transparent material layer 102 outgoing to air time, angle of incidence is less than light
Critical angle gamma when transparent material layer 102 is incident to air, such light just can from transparent material layer 102 outgoing to air,
So that from light guide body 101 inject transparent material layer 102 light can further from transparent material layer 102 outgoing to sky
Gas, improves the brightness of light from light guide plate 10 outgoing.
When the exiting surface of transparent material layer 102 is curved surface, by the regulation of transparent material layer 102, make from light guide body
The process of the light directive air of 101 outgoing is that a process during plane tilted is identical with the exiting surface of transparent material layer 102,
Here is omitted.
4th, the material of the transparent material layer 102 for choosing is not defined.On this basis, transparent material layer 102
Can be directly against being attached in light guide body 101, or transparent material layer 102 is placed in light guide body 101, then by other portion
Transparent material layer 102 is fixed by part with light guide body 101.
5th, the thickness for light guide body 101 and transparent material layer 102 is not defined, and can carry out as required
Rationally arrange.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 more than the refractive index of transparent material layer 102, it is also possible to be that the refractive index of transparent material layer 102 is more than light guide body
The refractive index of 101.
The embodiment of the present invention provides a kind of backlight module, and backlight module includes that light guide plate 10, light guide plate 10 include that leaded light is originally
Body 101 and the transparent material layer 102 being arranged on light guide body 101 light emission side surface, and the thickness of transparent material layer 102 is from leaning on
Nearly backlight 20 side is gradually reduced to away from backlight 20 side.Owing to the refractive index of transparent material layer 102 is more than air
Refractive index, the cirtical angle of total reflection that therefore light is incident to transparent material layer 102 from light guide body 101 increases, so that more
Light can be incident to transparent material layer 102 from light guide body 101.On this basis, due to transparent material layer 102 thickness from
Be gradually reduced to away from backlight 20 side near backlight 20 side, thereby through regulation transparent material layer 102 exiting surface with
The angle (exiting surface of transparent material layer 102 is the plane tilted) in the face contacted with light guide body 101 in transparent material layer 102
Or the curvature (exiting surface of transparent material layer 102 is curved surface) of transparent material layer 102 exiting surface, just can make to inject transparent material
The incident illumination outgoing of the certain angle of layer 102 is to air, thus adds the brightness of the light from light guide plate 10 outgoing.On the one hand,
Relative to being not provided with any structure in light guide body 101, the embodiment of the present invention arranges transparent material layer in light guide body 101
102 brightness that can increase the light from light guide plate 10 outgoing；On the other hand, relative to arranging site knot in light guide body 101
Structure, owing to arranging transparent material layer 102 in light guide body 101, and what the colour cast of transparent material layer 102 determined that, and transparent material
The colour cast of each position of the bed of material 102 is identical, thus the colour cast that light guide plate 10 causes can control, and light guide plate 10 color
The most uniform.
Preferably, as shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c), the exiting surface of transparent material layer 102 is for relative to leading
The plane that light body 101 light emission side surface tilts.
The embodiment of the present invention, if by the exiting surface of transparent material layer 102 relative to light guide body 101 light emission side surface configuration
For curved surface, owing to curved surface can increase processing technology difficulty, the therefore embodiment of the present invention relative to plane, transparent material layer 102
Exiting surface is the plane tilted relative to light guide body 101 light emission side surface, to simplify the processing technology difficulty of backlight module.
Preferably, as shown in Fig. 1 (b), Fig. 1 (c) and Fig. 2, light guide body 101 be shaped as wedge shape.
Wherein, light guide body 101 can be divided into flat board and wedge shape by shape.Wedge shape, i.e. refers to that the thickness of light guide body 101 is
The thickest the thinnest.
It should be noted that when light incides in light guide body 101, the multiple reflections in light guide body 101, enter
The angle of the incident illumination being mapped to light guide body 101 upper surface can reduce.Concrete, as in figure 2 it is shown, the light sent from backlight with
α 1 jiao injects the upper surface of light guide body 101, through two secondary reflections, incides the angle of the incident illumination of light guide body 101 upper surface
Degree becomes α 2, α 2 ＜ α 1.
The embodiment of the present invention, when when being shaped as wedge shape of light guide body 101, light is through the light guide body 101 of wedge shape, at wedge
The light guide body 101 of shape can reflect, thus the angle inciding the incident illumination of transparent material layer 102 can be made to diminish,
And total reflection is less likely to occur for low-angle incident illumination, such that it is able to increase the brightness of the light of outgoing from light guide body 101.
Preferably, as it is shown on figure 3, light guide plate 10 also includes be arranged on transparent material layer 102 light emission side surface first
Microlens array 103.
Wherein, the first lenticular shape in the first microlens array 103 is not defined, if be conducive to making from
In light guide body 101 and transparent material layer 102, the light of outgoing is uniformly.
Herein, the first microlens array 103 can be one-body molded with transparent material layer 102, it is also possible to the most separately formed.
If the first microlens array 103 and transparent material layer 102 are separately formed, can be attached to after the first lenticule molding
On transparent material layer 102.
The embodiment of the present invention, owing to the first microlens array 103 has the effect of even light, thus at transparent material layer 102
First microlens array 103 is set on light emission side surface, it can be ensured that from light guide body 101 and transparent material layer 102 outgoing
Light uniformity after the first microlens array 103.
It is further preferred that as shown in Fig. 4 (a), the first microlens array 103 is by multiple granules along two-dimensional directional arrangement
Shape lenticule forms, or as shown in Fig. 4 (b), the first microlens array 103 is micro-by multiple strips arranged along one-dimensional direction
Mirror forms.
In order to make from the light of transparent material layer 102 outgoing after the first microlens array 103, light can be uniformly dispersed,
Preferably first lenticular surface is circular arc type.That is, when the first microlens array 103 is by multiple granules along two-dimensional directional arrangement
During shape lenticule composition, lenticular it is shaped as hemispherical；When first microlens array 103 is arranged along one-dimensional direction by multiple
During strip lenticule composition, lenticular it is shaped as the semicolumn bodily form.
Wherein, between for spacing and strip lenticule between graininess lenticule in the first microlens array 103
Spacing be not defined, can be configured as required.
The embodiment of the present invention, owing to the first microlens array 103 is made up of or by multiple multiple graininess lenticulees
Shape lenticule forms, thus can act as the effect of even light, so that the light from the first microlens array 103 outgoing is more equal
Even.
Preferably, the material of light guide body 101 is Merlon (Polycarbonate is called for short PC), polymethylacrylic acid
Methyl ester (PMMA) and copolymer of methyl methacrylatestyrene (Methyl methacrylate-styrene
Copolymer, be called for short MS) mixture.
Wherein, PMMA is a kind of thermoplastic, has splendid weatherability, higher case hardness, preferable anti-impact
Hitting characteristic, good processing characteristics and high transparency, light transmittance is up to 91%～93%, it is seen that light transmission rate 99%,
Ultraviolet light light transmittance 70%, and lightweight.
PC is a kind of Linear carbon acid polyester, and in molecule, carbonic acid group is alternately arranged with other groups, and these groups are permissible
It is aromatic series, it is also possible to be aliphatic, it is also possible to be both to have.PC is the amorphous polymer of almost colourless glassy state,
Have the most optical, and PC macromolecule resin has the highest toughness.
MS polymer has the light transmission of excellence, optical, weatherability is good, is prone to features such as processing, cost is cheap.
Herein, when the mixture that material is PC, PMMA and MS of light guide body 101, for PC, PMMA in mixture
And the ratio shared by MS is not defined, can be adjusted as required.
The embodiment of the present invention, when the material of light guide body 101 is Merlon, polymethyl methacrylate and metering system
Acid methyl ester-styrol copolymer mixture time, the light guide body 101 of formation has higher photopermeability and good moulding
Toughness.
Preferably, as shown in Fig. 5 (a) and Fig. 5 (b), backlight module also includes the diffusion being arranged on light guide plate 10 light emission side
Sheet 30.
Wherein, material and structure for diffusion sheet 30 are not defined, as long as light can form one after diffusion sheet 30
Individual uniform area source.The substrate material of diffusion sheet 30 such as can choose the PET that light transmission rate is higher
(Polyetiylenterephthalate, polyethylene terephthalate)/PC/PMMA.Further, it is also possible at diffusion sheet 30
Substrate material in add some chemical particles as scattering particles, light can be the most different in refractive index when diffusion sheet 30
Medium passes, many refractions, reflection and scattering phenomenon can occur simultaneously, thus light is spread, to play the work widening visual angle
With.
Herein, diffusion sheet 30 can be upper diffusion sheet, it is also possible to for lower diffusion sheet.When diffusion sheet 30 is upper diffusion sheet,
Should have higher light transmission rate；When diffusion sheet 30 is lower diffusion sheet, should have higher mist degree.
The backlight module provided due to the embodiment of the present invention also includes the diffusion sheet 30 that is arranged on light guide plate 10 light emission side, and
Diffusion sheet 30 can make the light sent from light guide plate 10 uniform further, thus improves the uniform of the light that sends from backlight module
Property.
Preferably, as shown in Fig. 5 (b), backlight module also includes the second lenticule battle array being arranged on diffusion sheet 30 surface
Row 301.
Wherein, the second microlens array 301 can be arranged on the diffusion sheet 30 side near transparent material layer 102, it is possible to
To be arranged on the diffusion sheet 30 side away from transparent material layer 102 (to be arranged on diffusion sheet 30 away from transparent material in accompanying drawing 5 (b)
Illustrate as a example by the side of the bed of material 102).
Herein, the second microlens array 301 can be one-body molded with diffusion sheet 30, it is also possible to is the second microlens array
It is attached to after 301 molding on diffusion sheet 30.On this basis, lenticular in the second microlens array 301 second
Shape is not defined, and the second lenticular shape can be identical with the first lenticular shape, it is also possible to different.
It should be noted that when arranging the second microlens array 301 on diffusion sheet 30 surface, can be at transparent material
On layer 102, first microlens array 103 is set, it is also possible to be not provided with the first microlens array 103.
The embodiment of the present invention, arranges the second microlens array 301 on diffusion sheet 30 surface, can make from backlight further
The light that module sends is evenly.
Preferably, as shown in Fig. 6, Fig. 7 and Fig. 8, backlight module also includes reflector plate 40；Reflector plate 40 is led for encirclement
The tabula rasa 10 remaining surface in addition to incident side surface and light emission side surface.
Wherein, the material for reflector plate 40 is not defined, and the material of reflector plate 40 should be chosen has high reflectance
Material.Such as Ag (silver-colored), Cu (copper) or poly carbonate resin composition etc..Additionally, reflector plate 40 can include a tunic or
Multilayer film.
Herein, reflector plate 40 is for entering back in light conducting region by unscattered source reflection, to improve the utilization of light
Rate.
The embodiment of the present invention, is arranged instead in the light guide plate 10 remaining surface in addition to incident side surface and light emission side surface
Penetrate sheet 40, the utilization rate of light can be effectively improved.
Based on above-mentioned, backlight module can also as shown in Figure 7 and Figure 8, including other optical film material 50, when diffusion sheet 30 is
During lower diffusion sheet, other optical film material 50 is arranged on the light emission side of diffusion sheet 30, and other optical film material 50 such as can include rib
Eyeglass, upper diffusion sheet etc.；When diffusion sheet 30 is upper diffusion sheet, other optical film material 50 is arranged on diffusion sheet 30 and light guide plate 10
Between, other optical film material 50 such as can include prismatic lens, lower diffusion sheet etc..Prismatic lens is for concentrating on scattered light
Injection in certain limit, thus improve the brightness of this range of light.
The embodiment of the present invention also provides for a kind of display device, and including backlight module and display floater 60, backlight module is upper
The backlight module stated.
Wherein, display floater 60 include array base palte, to box substrate and be arranged on array base palte and to box substrate between
Liquid crystal layer, colored film layer can be arranged on array base palte, it is also possible to is arranged on box substrate.Array base palte includes that thin film is brilliant
Body pipe and pixel electrode, thin film transistor (TFT) includes 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 being arranged on light guide body 101 light emission side surface, and transparent material layer 102
Thickness Zi being gradually reduced to away from backlight 20 side near backlight 20 side.Refractive index due to transparent material layer 102
More than the refractive index of air, the cirtical angle of total reflection that therefore light is incident to transparent material layer 102 from light guide body 101 increases, from
And make more light can be incident to transparent material layer 102 from light guide body 101.On this basis, due to transparent material layer
The thickness of 102 is gradually reduced to away from backlight 20 side Zi near backlight 20 side, thereby through regulation transparent material layer
(exiting surface of transparent material layer 102 is the angle in 102 exiting surfaces and the face contacted with light guide body 101 in transparent material layer 102
The plane tilted) or the curvature (exiting surface of transparent material layer 102 is curved surface) of transparent material layer 102 exiting surface, just can make
Inject the incident illumination outgoing of certain angle of transparent material layer 102 to air, thus add the light from light guide plate 10 outgoing
Brightness.On the one hand, relative to being not provided with any structure 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 of the light from light guide plate 10 outgoing；On the other hand, relative in light guide body 101
Arranging lattice point structure, owing to arranging transparent material layer 102 in light guide body 101, and the colour cast of transparent material layer 102 determines that
, and the colour cast of each position of transparent material layer 102 is identical, thus the colour cast that light guide plate 10 causes can control,
And light guide plate 10 colour cast is uniform.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (10)
1. a backlight module, it is characterised in that include light guide plate and be arranged on the backlight of described light guide plate side, described in lead
Tabula rasa includes light guide body and the transparent material layer being arranged on described light guide body light emission side surface；
Wherein, described light guide body is different with the refractive index of described transparent material layer, and the thickness of described transparent material layer is from close
Described backlight side is gradually reduced to away from described backlight side.
Backlight module the most according to claim 1, it is characterised in that the exiting surface of described transparent material layer is for relative to institute
State the plane that light guide body light emission side surface tilts.
Backlight module the most according to claim 1, it is characterised in that described light guide body be shaped as wedge shape.
Backlight module the most according to claim 1, it is characterised in that described light guide plate also includes being arranged on described transparent material
The first microlens array on bed of material light emission side surface.
Backlight module the most according to claim 4, it is characterised in that described first microlens array by multiple along two-dimensional square
To the graininess lenticule composition of arrangement, or described first microlens array is micro-by multiple strips arranged along one-dimensional direction
Mirror forms.
Backlight module the most according to claim 1, it is characterised in that the material of described light guide body is Merlon, gathers
Methyl methacrylate and the mixture of copolymer of methyl methacrylatestyrene.
Backlight module the most according to claim 1, it is characterised in that described backlight module also includes being arranged on described leaded light
The diffusion sheet of plate light emission side.
Backlight module the most according to claim 7, it is characterised in that described backlight module also includes being arranged on described diffusion
The second microlens array on sheet surface.
Backlight module the most according to claim 1, it is characterised in that described backlight module also includes reflector plate；
Described reflector plate is for surrounding described light guide plate remaining surface in addition to incident side surface and light emission side surface.
10. a display device, including backlight module and display floater, it is characterised in that described backlight module is claim
Backlight module described in any one of 1-9.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106199819A true CN106199819A (en) | 2016-12-07 |
| CN106199819B CN106199819B (en) | 2019-07-05 |
Family
ID=57520929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610875803.0A Expired - Fee Related CN106199819B (en) | 2016-09-30 | 2016-09-30 | A kind of backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106199819B (en) |
Cited By (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) |
| CN114265141A (en) * | 2021-12-23 | 2022-04-01 | 武汉华星光电技术有限公司 | Light guide plate, backlight module and display device |
| WO2022213909A1 (en) * | 2021-04-08 | 2022-10-13 | 马鞍山晶智科技有限公司 | Transparent one-way light-emitting light source module |
Citations (6)
| 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 |
| 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 |
| 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 |
-
2016
- 2016-09-30 CN CN201610875803.0A patent/CN106199819B/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| 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 |
| 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 |
Cited By (5)
| 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) |
| WO2022213909A1 (en) * | 2021-04-08 | 2022-10-13 | 马鞍山晶智科技有限公司 | Transparent one-way light-emitting light source module |
| CN114265141A (en) * | 2021-12-23 | 2022-04-01 | 武汉华星光电技术有限公司 | Light guide plate, backlight module and display device |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106199819B (en) | 2019-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102308232B (en) | Optical component, lighting device, and display device | |
| CN1987606B (en) | Back light module and liquid crystal display module | |
| KR101329413B1 (en) | Optical lens, optical module having the optical lens and backlight unit having the optical module | |
| CN101430072B (en) | Assembled uniform surface light source | |
| CN101025517B (en) | Backlight module | |
| EP2003390A2 (en) | Direct-type backlight device | |
| US8287172B2 (en) | Planar illumination device | |
| CN106199819B (en) | A kind of backlight module and display device | |
| CN101644854A (en) | Direct backlight module | |
| CN101749598A (en) | Illuminating device and display device having the same | |
| WO2020192300A1 (en) | Optical collimating assembly, backlight module, and display device | |
| KR20090060936A (en) | Backlight unit | |
| JP2009164101A (en) | Backlight | |
| CN106154398A (en) | A kind of side entrance back module and display device | |
| CN101620344A (en) | Backlight module and optical plate thereof | |
| CN103322504A (en) | Secondary optical lens of LED backlight system for flat liquid crystal display | |
| US20100259825A1 (en) | Composite brightness enhancement film having two-phase hazing layer | |
| CN101620283B (en) | Backlight module and diffusion plate thereof | |
| US20080117515A1 (en) | Two-layered optical plate and method for making the same | |
| CN101149523A (en) | Backlight module and lamp possessing direct type light guiding board | |
| CN202330747U (en) | Prism sheet, backlight module with prism sheet, and liquid crystal display device | |
| CN101625483A (en) | Backlight module and diffusion plate thereof | |
| CN102207566A (en) | Prism sheet, back light module unit with prism sheet and liquid crystal display (LCD) device | |
| CN103822139A (en) | Backlight source module and display device | |
| CN101620342B (en) | Backlight module and optical plate thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190705 Termination date: 20210930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |