CN107102473A - A kind of backlight module and liquid crystal display device - Google Patents
A kind of backlight module and liquid crystal display device Download PDFInfo
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- CN107102473A CN107102473A CN201710361468.7A CN201710361468A CN107102473A CN 107102473 A CN107102473 A CN 107102473A CN 201710361468 A CN201710361468 A CN 201710361468A CN 107102473 A CN107102473 A CN 107102473A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 64
- 239000002096 quantum dot Substances 0.000 claims abstract description 42
- 239000003086 colorant Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 210000002858 crystal cell Anatomy 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000002310 reflectometry Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000011514 reflex Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The application provides three kinds of backlight modules and corresponding liquid crystal display device.Being equipped with backlight module in light collimating structure, light collimating structure includes angle Selection part, and one of which light collimating structure also includes reflection mixed light part, and two kinds of light collimating structures also include angular dispersed part in addition.Angle Selection part, which is provided with, to be met the light of predetermined angle and can be directly over angle Selection part and exhale in multiple through holes, the light of back light transmitting；The light for not meeting predetermined angle then changes propagation angle under reflection mixed light part, angular dispersed part and the reflection of angle Selection part or refraction action, untill predetermined angle is met.The application passes through light collimating structure, the light that back light is launched can be converted into the low-angle backlight for meeting predetermined angle, the low-angle backlight can be completely into corresponding quantum dot element, the colour purity that backlight can be solved declines, and between three primary colors backlight the problem of color cross-talk.
Description
Technical field
The application is related to field of liquid crystal display, more particularly to a kind of backlight module and liquid crystal display device.
Background technology
Liquid crystal display generally includes the backlight module and liquid crystal panel that order is set.Liquid crystal panel is a kind of passive luminous
Element, itself does not light, it is necessary to which backlight module provides the sufficient backlight of brightness, to realize the display work(of liquid crystal display device
Energy.
Fig. 1 is a kind of structural representation of liquid crystal display.As shown in figure 1, liquid crystal display includes the He of backlight module 10
Liquid crystal panel 20.Backlight module includes equally distributed multiple LED Blue backlights 11, and liquid crystal panel 20 includes the He of liquid crystal layer 21
Quantum dot colors conversion layer 22, liquid crystal layer 21 includes the multiple liquid crystal cells 211 arranged successively, and quantum dot colors conversion layer 22 is wrapped
Include the multiple quantum dot conversion groups 221 arranged successively, each quantum dot conversion group 221 is by a red quantum sequentially arranging
Dot element, a green quantum dot element and a blank quantum dot element composition, wherein, each quantum dot converting unit is equal
It is correspondingly arranged with a liquid crystal cells 211.When liquid crystal display display image, Blue backlight enters liquid crystal layer 21, liquid crystal layer
Liquid crystal in the liquid crystal cells of each in 21 211 can be rearranged according to display demand, so as to change Blue backlight through each liquid
The luminous flux of brilliant unit 211, enters quantum dot color conversion layer 22, quantum dot colors conversion by the Blue backlight of liquid crystal layer 21
Blue backlight can be converted into three original corresponding with each quantum dot converting unit by each quantum dot conversion group 221 in layer 22
Color backlight, the different three primary colors backlight of luminous flux can be obtained on the color of a respective pixel, display screen after mediation
The pixel of each different colours can collectively form the image for needing to show.
At present, the launch angle of LED backlight is generally larger, is easily accessible by the backlight of liquid crystal cells except corresponding amount
In other quantum dot converting units beyond son point converting unit.Such as, when a green quantum dot element pair in unlatching Fig. 1
During the liquid crystal cells answered, the Blue backlight of wide-angle can be entered by the liquid crystal cells adjacent red quantum dot element and
In blank quantum dot element, a small amount of red backlight and Blue backlight is obtained accordingly, causes green quantum dot element corresponding
The colour purity of green colored backlights declines, and the color cross-talk between three primary colors backlight, influences the display effect of liquid crystal display.
The content of the invention
This application provides a kind of backlight module and liquid crystal display device, declined with the colour purity for solving backlight, and
Between three primary colors backlight the problem of color cross-talk.
In a first aspect, the application's provides a kind of backlight module, the backlight module includes：
Multiple arragement direction identical unit modules, the unit module include back light unit and with the back light unit pair
The light collimating structure that should be set, the back light unit includes at least one back light, and the light collimating structure includes anti-
Mixed light part and angle Selection part are penetrated, wherein,
The reflection mixed light part is arranged at the surrounding of the back light unit, and the reflection mixed light part, which includes one, to be used for
Reflect the reflecting surface of backlight；
The angle Selection part is covered in the top of the reflecting surface, and the angle Selection part is provided with multiple through holes,
The bottom surface radius of the through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；
The angle Selection part is the material with high reflectivity energy.
Second aspect, the application's additionally provides another backlight module, and the backlight module includes：
Multiple arragement direction identical unit modules, the unit module include back light unit and with the back light unit pair
The light collimating structure that should be set, the back light unit includes at least one back light, and the light collimating structure includes angle
Divergent component and angle Selection part are spent, wherein,
The angular dispersed part includes diverging body, and a concave structure is provided with the bottom surface of the diverging body, described
Back light unit is arranged in the concave structure, and the side of the diverging body is pasted with reflecting layer；
The angle Selection part is arranged at the upper surface of the angular dispersed part, and the angle Selection part is provided with more
Individual through hole, the bottom surface radius of the through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；
The angular dispersed part is the material with highly transmissive energy, and the angle Selection part is with high reflectivity
The material of energy.
The third aspect, present invention also provides the third backlight module, the backlight module includes：
Multiple arragement direction identical back lights, and the light being correspondingly arranged with the multiple back light are collimated and tied
Structure, the light collimating structure includes angular dispersed part and angle Selection part, wherein,
The angular dispersed part includes diverging body, and multiple concave structures are provided with the bottom surface of the diverging body,
Each described back light is arranged in the corresponding concave structure, and reflection is pasted with the side of the diverging body
Layer；
The angle Selection part is arranged at the upper surface of the angular dispersed part, and the angle Selection part is provided with more
Individual through hole, the bottom surface radius of the through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；
The angular dispersed part is the material with highly transmissive energy, and the angle Selection part is with high reflectivity
The material of energy.
Fourth aspect, the application also provides a kind of liquid crystal display device, and the liquid crystal display device includes above-mentioned any one
Backlight module and liquid crystal panel described in, wherein,
The liquid crystal panel includes liquid crystal layer and quantum dot colors conversion layer, and the liquid crystal layer is arranged at the backlight module
Between the quantum dot colors conversion layer；
The liquid crystal layer includes the multiple liquid crystal cells arranged successively, and the quantum dot colors conversion layer includes arranging successively
Multiple quantum dot conversion groups, the quantum dot conversion group include can by backlight corresponding conversion be trichromatic quantum dot element,
The quantum dot element is correspondingly arranged with the liquid crystal cells.
The application's has the beneficial effect that：
The application provides three kinds of backlight modules and corresponding liquid crystal display device.Light collimation knot is equipped with backlight module
Include angle Selection part in structure, light collimating structure, one of which light collimating structure also includes reflection mixed light part, separately
Outer two kinds of light collimating structures also include angular dispersed part.Angle Selection part is provided with multiple through holes, back light transmitting
Light in meet the light of predetermined angle and can be directly over angle Selection part and exhale；The light of predetermined angle is not met
Line then changes angle of propagation under reflection mixed light part, angular dispersed part and the reflection of angle Selection part or refraction action
Degree, untill predetermined angle is met.The light that back light is launched can be converted into by the application by light collimating structure
Meet the low-angle backlight of predetermined angle, the low-angle backlight be able to can be solved completely into corresponding quantum dot element
The colour purity of backlight declines, and between three primary colors backlight the problem of color cross-talk.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of liquid crystal display；
Fig. 2 is a kind of structural representation for backlight module that the embodiment of the present application one is provided；
Fig. 3 is a kind of structural representation for unit module that the embodiment of the present application one is provided；
Fig. 4 is a kind of light path schematic diagram for backlight that the embodiment of the present application one is provided；
Fig. 5 is the light distribution schematic diagram of the backlight light for the back light transmitting that the embodiment of the present application two is provided；
Fig. 6 is a kind of structural representation for unit module that the embodiment of the present application two is provided；
Fig. 7 is a kind of structural representation for unit module that the embodiment of the present application three is provided；
Fig. 8 is a kind of light path schematic diagram for backlight that the embodiment of the present application three is provided；
Fig. 9 is a kind of light path schematic diagram for backlight that the embodiment of the present application four is provided；
Figure 10 is a kind of structural representation for backlight module that the embodiment of the present application five is provided；
Figure 11 is a kind of structural representation for liquid crystal display device that the embodiment of the present application six is provided.
Embodiment
Referring to Fig. 2 and Fig. 3, respectively the application provides structural representation and this Shen of a kind of backlight module of embodiment one
A kind of structural representation of unit module of embodiment one please be provided.From Fig. 2 and Fig. 3, the application backlight module includes：
Multiple arragement direction identical unit modules 100, wherein, each described unit module 100 includes backlight list
Member 200, and, the light collimating structure 300 being correspondingly arranged with the back light unit 200.Back light unit 200 includes at least one
Back light 210.Produced between the light launched in order to avoid multiple back lights 210 in interference, back light unit 200 generally only
Including a back light.Back light unit 200 is used to provide brightness sufficient backlight, to realize the display work(of liquid crystal display device
Energy.
Each light collimating structure 300 includes two reflection mixed light parts 310 and an angle Selection part 320,
Two reflection mixed lights part 310 therein is arranged at the surrounding of back light unit 200, and angle Selection part 320 is covered in the above two
The top of individual reflection mixed light part 310, the top of the reflection mixed light part 310 refers to reflecting remote on mixed light part 310
The face of back light unit 200.Whole light collimating structure 300 can be circumference symmetrical structure, or square structure.
Specifically, reflection mixed light part 310 includes a reflecting surface 311 for being used to reflect backlight, it is preferred that reflecting surface
Distance on 311 along each point away from the direction of back light unit 200 to plane where the lower surface of back light unit 200 by
It is small to arrive big consecutive variations.Angle Selection part 320 with high reflectivity energy is covered in the top of the reflecting surface 311, angle
Alternative pack 320 is provided with the smooth through hole 321 of multiple run through, smooth surfaces.The bottom surface radius of the dipped beam source of through hole 321 be more than or
Equal to the bottom surface radius of distance light source, the dipped beam source is that, close to the side of back light unit 200, the distance light source is remote
The side of back light unit 200.
Exist the reflecting surface of above variation characteristic according to from close to back light unit 200 to the direction away from back light unit 200,
Angle Selection part 320 is moved closer to, and the incident angle (reflection angle) of backlight light can be gradually reduced.In angle choosing
In the case of the shape and distributing position all same of selecting through hole 321 on part 320, the above variation characteristic of reflecting surface is more favourable
Predetermined angle is reached in backlight light, so as to enter liquid crystal panel through angle Selection part 320.The reflecting surface of other forms
311 easily cause backlight light multiple reflections in light collimating structure 300, or even backlight light occur in angle Selection portion
Unlimited secondary reflection in part 320, and the situation through angle Selection part 320 can not be reached.Because each secondary reflection of light is equal
Certain optical energy loss can be caused, it is seen then that the reflecting surface 311 that the application is provided can be while angle Selection, as far as possible
Avoid the energy loss of backlight.
The through hole 321 being arranged on angle Selection part 320 is the key factor of backlight light angle selection, is only met
The backlight light of predetermined angle can be exhaled through the through hole 321.Predetermined angle and the bottom surface of the distance light source of through hole 321
Relational expression between radius is represented by：θ=arctan (a/h), wherein, θ is predetermined angle, the bottom of the distance light source of through hole 321
Radius surface is a, and the distance of bottom surface to the upper surface of the back light unit 200 place plane of the distance light source of through hole 321 is h.When backlight light
When the launch angle of line is less than or equal to predetermined angle θ, backlight light can then be directed through angle Selection portion 320；Work as backlight
When the launch angle of light is more than predetermined angle θ, backlight light can then reflect on angle Selection part 320.
Through hole 321 can be cylindrical hole or inverted round stage hole, in the application, and through hole 321 is preferably inverted round stage hole.Due to falling
The following table radius surface of round platform hole is more than upper table radius surface, therefore, in the upper table radius surface and cylindrical hole of reverse frustoconic through hole
In the case of the radius identical of bottom surface, reverse frustoconic through hole can allow for more backlight light into progress light in through hole 321
The screening of angle, a portion does not meet the backlight light of predetermined angle, after the reflex of the side wall of through hole 321,
It is possible to be converted into the light for meeting angle requirement and by through hole 321, so as to reduce the order of reflection and energy of backlight light
Loss, improves the efficiency that angle Selection part 320 is selected backlight light.
In addition, in order to improve the efficiency of light energy utilization as far as possible, the surface of back light unit 200 is typically provided with corresponding
Through hole 321, angle Selection is carried out so that the backlight light that back light unit 200 is sent can be directly entered the through hole 321.
In addition, the tip position of reflecting surface 311 can set a prominent ledge structure on reflection mixed light part 310
312, angle Selection part 320 is fastened between symmetrically arranged two reflections mixed light part, to strengthen angle Selection part 320
Fastness on reflection mixed light part 310.
It is a kind of light path schematic diagram for backlight that the embodiment of the present application one is provided referring to Fig. 4.From fig. 4, it can be seen that back light unit
The less backlight light of a part of angle of 200 transmittings can be directly entered the through hole being positioned above, into the back of the body of the through hole
In light light, the backlight light less than or equal to predetermined angle can enter liquid crystal panel directly through the through hole；More than pre-
If the backlight light of angle can then be reflected by the through hole, return to and be total to by the lower surface of reflecting surface 311 and angle Selection part 320
With in the light mixing chamber 330 surrounded, under the reflex of reflection mixed light part 310 and angle Selection part 320, continue to adjust hair
Firing angle degree, until meeting after predetermined angle, is projected from through hole 321.The another part angle that back light unit 200 is launched is bigger than normal
Then in the entity structure of angle Selection part 320 reflex can occur for backlight light, return in light mixing chamber 330, continue to adjust
Whole launch angle.
The application is by light collimating structure, and the backlight light that can launch back light, which is converted into, meets predetermined angle
Low-angle backlight, the low-angle backlight can be completely into corresponding quantum dot element, and the color that can solve backlight is pure
Degree declines, and between three primary colors backlight the problem of color cross-talk.
Figure be refer to referring to Fig. 5, be the light intensity point of the backlight light for the back light transmitting that the embodiment of the present application two is provided
Cloth schematic diagram.As seen from Figure 5, closer to the center (visual angle is zero) of back light, the luminous flux of back light is bigger, the back of the body
Light light is more concentrated.It can be seen that, the backlight light of back light transmitting is not equally distributed, but with the increasing of launch angle
Gradually decrease greatly.In order to ensure the display effect of liquid crystal display device, the backlight light of back light transmitting needs have one
Fixed uniformity.In the application, reflecting surface 311 can be plane, or curved surface, such as sphere, ellipsoid or freedom
Curved surface.But the uniformity for being in order at backlight light considers that reflecting surface 311 is preferably designed as sphere or ellipsoid by the application.
Figure be refer to referring to Fig. 6, be a kind of structural representation for unit module that the embodiment of the present application two is provided.By Fig. 6
It can be seen that, reflecting surface 311 is a part for sphere.In the case of the shape and distributing position all same of through hole 321, sphere or ellipse
Sphere is more beneficial for backlight light compared with plane and spread to the both sides of back light 210, so as to improve backlight light to a certain extent
Line intermediate density is big, the problem of both sides are small.
In order to further improve in the uniformity of backlight light, the embodiment of the present application, through hole on angle Selection part 320
321 distribution density gradually rises along the direction away from back light unit.In the position close to the center of back light unit 200, phase is set
To less through hole 321, to force a part to be distributed in the backlight light at the center of back light unit 200 in angle Selection part 320
Entity part on launch so as to back light unit 200 both sides spread.It can be seen that, by changing dredging for the distribution of through hole 321
Close degree, can coordinate the light distribution characteristic of backlight light, be conducive to improving the equal of the backlight light that back light unit 200 is launched
Even property.
In addition, in the embodiment of the present application, plane where each point arrives the back light lower surface on reflecting surface 311 is most
Small distance is less than or equal to the height of the back light.Back light unit 200 and corresponding reflection mixed light part 310 are usual
In same level, the minimum thickness (i.e. close to the thickness of the side of back light unit 200) of reflection mixed light part 310 should be less than
Or equal to the thickness of back light 210 in back light unit 200.Two reflections for being symmetricly set in the both sides of back light unit 200 are mixed
The distance between light part 310 is smaller, if the minimum thickness of reflection mixed light part 310 is much larger than the thickness of back light 210,
It is repeatedly anti-that the backlight light that then back light 210 is emitted is likely to require the generation on the side wall of reflection mixed light part 310
After penetrating, light mixing chamber 330 could be entered and carry out angle Selection, unnecessary optical energy loss is caused.
Present invention also provides another backlight module, with the uniformity for the backlight light for improving back light unit transmitting.
The backlight module includes multiple arragement direction identical unit modules, arrangement mode and the class of embodiment one of unit module
Seemingly.
Figure be refer to referring to Fig. 7, be a kind of structural representation for unit module that the embodiment of the present application three is provided.By Fig. 7
It can be seen that, the unit module that embodiment three is provided includes：
Back light unit 200 and the light collimating structure 400 being correspondingly arranged with back light unit 200, back light unit 200 are included extremely
A few back light, light collimating structure 400 includes the angle choosing of the angular dispersed part 410 and high reflectivity of highly transmissive
Part 420 is selected, wherein, the angle Selection part 420 is arranged at the top of the angular dispersed part 410, and (top is
Back light unit 200 launches the direction of light).Angle Selection part 420 is provided with multiple through holes 421, the dipped beam source of through hole 421
Bottom surface radius be more than or equal to distance light source bottom surface radius.
Angular dispersed part 410 includes diverging body 411, and the diverging body 411 is straight four prisms cylinder, in the diverging
An arbitrary surface is provided with a smooth concave structure 412 in body.Under normal circumstances, the He of angular dispersed part 410
Back light unit 200 may be contained within horizontal plane, now, the face where concave structure 412 as angular dispersed part 410 bottom
Face, button is located at the top of back light unit 200 (i.e. back light unit 200 is arranged at the inside of concave structure 412).Dissipate body 411
Each side be pasted with reflecting layer 413.Backlight module is typically placed on pcb board, and oiling white oil on pcb board, is had
Reflection function, that is, dissipate the bottom surface of body 411 directly can contact with the white oil on pcb board, thus, body is dissipated in the present embodiment
411 bottom surface need not attach reflecting layer 413.
Concave structure 412 is a crucial setting on angular dispersed part 410, according to concavees lens principle, angular dispersed
Part 410 has disperse function to the backlight light that back light unit 200 is launched, and is conducive to concentrating on the centre bit of back light unit 200
The backlight light put spreads to the both sides of back light unit 200, so as to obtain the higher backlight of the uniformity.
Fig. 8 is referred to, is a kind of light path schematic diagram for backlight that the embodiment of the present application three is provided.
As seen from Figure 8, the backlight light that back light unit 200 is launched is initially entered inside angular dispersed part 410, by angle
After the disperse function for spending divergent component 410, a part of less backlight light of angle can be directly entered be positioned above logical
Hole, into the backlight light of the through hole, the backlight light less than or equal to predetermined angle can enter directly through the through hole
Enter liquid crystal panel；Backlight light more than predetermined angle can then be reflected by the through hole, return to inside angular dispersed part 410,
And under the side wall of angular dispersed part 410 and the reflex of angle Selection part 420, (the backlight reflected from through hole
The usual incident angle of light is larger, therefore many based on reflection, and a small amount of refracted light is not shown in fig. 8) continue to adjust hair
Firing angle degree, until meeting after predetermined angle, is projected from through hole 421.The another part angle that back light unit 200 is launched is bigger than normal
Then in the entity structure of angle Selection part 420 reflex can occur for backlight light, return in angular dispersed part 410,
Continue to adjust launch angle.
The present embodiment between back light unit 200 and angle Selection part 420 by setting angular dispersed part 410, energy
It is enough that disperse function is played to the backlight light that back light unit 200 is launched to a certain extent, be conducive to improving in the middle of backlight light
Density is big, the problem of both sides are small.By the light collimating structure being made up of angular dispersed part 410 and angle Selection part 420,
The backlight light that back light can be launched is converted into the low-angle backlight for meeting predetermined angle, and the low-angle backlight can be complete
Enter entirely in corresponding quantum dot element, the colour purity that can solve backlight declines, and color string between three primary colors backlight
The problem of disturbing.
In the application, concave structure 412 can be spherical structure, ellipsoid structure or can realize its of scattering function
His structure.In order to further improve diverging ability of the angular dispersed part 410 to backlight, the embodiment of the present application four is provided in addition
In a kind of unit module, this unit module, concave structure 412 is ellipsoid structure.Fig. 9 is referred to, is the embodiment of the present application four
A kind of light path schematic diagram of the backlight provided.In unit module provided in embodiment three, concave structure 412 is sphere knot
Structure；In unit module provided in example IV, concave structure 412 is ellipsoid structure.Spherical radius in embodiment three
Equal with the major axis of ellipsoid in example IV, comparison diagram 8 and light path shown in Fig. 9 are visible, the backlight light of identical launch angle
Extent of refraction of the line on ellipsoid is more than the extent of refraction on sphere, i.e., under same case, diverging of the ellipsoid to backlight
Degree is bigger, is conducive to improving the uniformity of backlight to a certain extent.
In addition, in the application, multiple through holes 421 can be evenly distributed on angle Selection part 420.On the one hand
Be conducive to the batch machining of angle Selection part 420；On the other hand, the setting of angular dispersed part 410 and through hole 421 disperse close
The adjustment of degree is for obtaining the backlight being more uniformly distributed, and the two effect is identical, therefore, and one is selected in two kinds of measures, is prevented
Light positioned at center influences the uniformity of backlight on the contrary by the excessive both sides that are distributed to, in addition, two kinds of measure superpositions make
With the reflection and refraction number of times that can also increase backlight light, many unnecessary energy losses are caused.
For the ease of the assembling of the integration processing of backlight module, and light collimating structure and back light, the application
Additionally provide a kind of backlight module.Figure 10 is referred to, is a kind of structural representation for backlight module that the embodiment of the present application five is provided
Figure.As seen from Figure 10, backlight module includes：
Multiple arragement direction identical back lights 210, and the light being correspondingly arranged with the multiple back light 210
Collimating structure 500, light collimating structure 500 includes angular dispersed part 510 and angle Selection part 520, wherein,
The angular dispersed part 510 includes diverging body 511, and the diverging body 511 is straight four prisms cylinder, described
Dissipate arbitrary bottom surface in body 511 and be provided with multiple concave structures 512, each described back light 210 is arranged on accordingly
The concave structure 512 in, with being pasted with reflecting layer 513 on the side of concave structure 512；
The angle Selection part 520 is arranged at the upper surface of the angular dispersed part 510, the angle Selection part
520 are provided with multiple through holes, and the bottom surface radius of the through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；It is described
Angular dispersed part 510 is the material with highly transmissive energy, and the angle Selection part 520 is the material with high reflectivity energy
Matter.
In addition, present invention also provides a kind of liquid crystal display device.Figure 11 is referred to, is what the embodiment of the present application six was provided
A kind of structural representation of liquid crystal display device.As seen from Figure 11, the present apparatus is included in embodiment one to five described in any one
Backlight module 600 and liquid crystal panel 700, wherein, liquid crystal panel 700 include liquid crystal layer 710 and quantum dot colors conversion layer
720, the liquid crystal layer 710 is arranged between the backlight module 600 and the quantum dot colors conversion layer 720；
The liquid crystal layer 710 includes the multiple liquid crystal cells 711 arranged successively, and the quantum dot colors conversion layer 720 is wrapped
The multiple quantum dot conversion groups 721 arranged successively are included, the quantum dot conversion group 721 includes being three former by backlight corresponding conversion
The quantum dot element 7211 of color, the quantum dot element 7211 is correspondingly arranged with the liquid crystal cells 711.
The application provides three kinds of backlight modules and corresponding liquid crystal display device.Light collimation knot is equipped with backlight module
Include angle Selection part in structure, light collimating structure, one of which light collimating structure also includes reflection mixed light part, separately
Outer two kinds of light collimating structures also include angular dispersed part.Angle Selection part is provided with multiple through holes, back light transmitting
Light in meet the light of predetermined angle and can be directly over angle Selection part and exhale；The light of predetermined angle is not met
Line then changes angle of propagation under reflection mixed light part, angular dispersed part and the reflection of angle Selection part or refraction action
Degree, untill predetermined angle is met.The light that back light is launched can be converted into by the application by light collimating structure
Meet the low-angle backlight of predetermined angle, the low-angle backlight be able to can be solved completely into corresponding quantum dot element
The colour purity of backlight declines, and between three primary colors backlight the problem of color cross-talk.
Between the embodiment of each in this specification identical similar part mutually referring to.Invention described above is real
The mode of applying is not intended to limit the scope of the present invention..
Claims (9)
1. a kind of backlight module, it is characterised in that the backlight module includes：
Multiple arragement direction identical unit modules, the unit module includes back light unit and corresponding with the back light unit set
The light collimating structure put, the back light unit includes at least one back light, and it is mixed that the light collimating structure includes reflection
Light part and angle Selection part, wherein,
The reflection mixed light part is arranged at the surrounding of the back light unit, and the reflection mixed light part, which includes one, to be used to reflect
The reflecting surface of backlight；
The angle Selection part is covered in the top of the reflecting surface, and the angle Selection part is provided with multiple through holes, described
The bottom surface radius of through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；
The angle Selection part is the material with high reflectivity energy.
2. backlight module as claimed in claim 1, it is characterised in that the reflecting surface is a part for sphere.
3. backlight module as claimed in claim 1, it is characterised in that the distribution density of multiple through holes is along away from the back of the body
The direction of light unit gradually rises.
4. the backlight module as described in claim 1-3 any one, it is characterised in that each point is described on the reflecting surface
The minimum range of plane is less than or equal to the height of the back light where back light lower surface.
5. a kind of backlight module, it is characterised in that the backlight module includes：
Multiple arragement direction identical unit modules, the unit module includes back light unit and corresponding with the back light unit set
The light collimating structure put, the back light unit includes at least one back light, and the light collimating structure is sent out including angle
Separate component and angle Selection part, wherein,
The angular dispersed part includes diverging body, and a concave structure, the backlight are provided with the bottom surface of the diverging body
Unit is arranged in the concave structure, and the side of the diverging body is pasted with reflecting layer；
The angle Selection part is arranged at the upper surface of the angular dispersed part, and the angle Selection part is provided with multiple logical
Hole, the bottom surface radius of the through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；
The angular dispersed part is the material with highly transmissive energy, and the angle Selection part is with high reflectivity energy
Material.
6. backlight module as claimed in claim 5, it is characterised in that the concave structure is ellipsoid structure.
7. backlight module as claimed in claim 5, it is characterised in that multiple through holes are evenly distributed on the angle Selection
On part.
8. a kind of backlight module, it is characterised in that the backlight module includes：
Multiple arragement direction identical back lights, and the light collimating structure being correspondingly arranged with the multiple back light,
The light collimating structure includes angular dispersed part and angle Selection part, wherein,
The angular dispersed part includes diverging body, and multiple concave structures are provided with the bottom surface of the diverging body, each
The individual back light is arranged in the corresponding concave structure, and reflecting layer is pasted with the side of the diverging body；
The angle Selection part is arranged at the upper surface of the angular dispersed part, and the angle Selection part is provided with multiple logical
Hole, the bottom surface radius of the through hole dipped beam source is more than or equal to the bottom surface radius of distance light source；
The angular dispersed part is the material with highly transmissive energy, and the angle Selection part is with high reflectivity energy
Material.
9. a kind of liquid crystal display device, it is characterised in that the liquid crystal display device is included such as claim 1-8 any one institute
The backlight module and liquid crystal panel stated, wherein,
The liquid crystal panel includes liquid crystal layer and quantum dot colors conversion layer, and the liquid crystal layer is arranged at the backlight module and institute
State between quantum dot colors conversion layer；
The liquid crystal layer includes the multiple liquid crystal cells arranged successively, and the quantum dot colors conversion layer is more including what is arranged successively
Individual quantum dot conversion group, the quantum dot conversion group includes to be trichromatic quantum dot element by backlight corresponding conversion, described
Quantum dot element is correspondingly arranged with the liquid crystal cells.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710361468.7A CN107102473A (en) | 2017-05-22 | 2017-05-22 | A kind of backlight module and liquid crystal display device |
| PCT/CN2018/078874 WO2018214618A1 (en) | 2017-05-22 | 2018-03-13 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710361468.7A CN107102473A (en) | 2017-05-22 | 2017-05-22 | A kind of backlight module and liquid crystal display device |
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| CN107102473A true CN107102473A (en) | 2017-08-29 |
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| CN108873126A (en) * | 2018-06-26 | 2018-11-23 | 武汉华星光电技术有限公司 | A kind of optical diaphragm, backlight module and display device |
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| WO2019085629A1 (en) * | 2017-10-30 | 2019-05-09 | 青岛海信电器股份有限公司 | Liquid crystal display device and backlight module thereof |
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| CN113031341A (en) * | 2021-03-12 | 2021-06-25 | 业成科技（成都）有限公司 | Light emitting diode light source assembly and reflection structure and display structure thereof |
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| CN110456558B (en) * | 2018-05-08 | 2022-08-19 | 京东方科技集团股份有限公司 | Optical film material, backlight source and display device |
| CN108873126A (en) * | 2018-06-26 | 2018-11-23 | 武汉华星光电技术有限公司 | A kind of optical diaphragm, backlight module and display device |
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| WO2018214618A1 (en) | 2018-11-29 |
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