CN105334669B - A kind of backlight module and liquid crystal display - Google Patents
A kind of backlight module and liquid crystal display Download PDFInfo
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- CN105334669B CN105334669B CN201510902245.8A CN201510902245A CN105334669B CN 105334669 B CN105334669 B CN 105334669B CN 201510902245 A CN201510902245 A CN 201510902245A CN 105334669 B CN105334669 B CN 105334669B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 17
- 238000004020 luminiscence type Methods 0.000 claims abstract description 60
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 6
- 230000005142 aphototropism Effects 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 7
- 230000011514 reflex Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 8
- 238000005282 brightening Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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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)
Abstract
The invention discloses a kind of backlight module and liquid crystal displays, are related to technical field of liquid crystal display, can effectively solve the problems, such as that speck is locally present in down straight aphototropism mode set.The backlight module includes LED luminescence chip and prismatic lens, the prismatic lens include substrate and setting micro-prism structure on base material, micro-prism structure includes first kind triangular prism micro-structure and the second prism class micro-structure, the cross section apex angle of first kind triangular prism micro-structure is greater than the cross section apex angle of the second prism class micro-structure, the reflex for the low-angle light that second prism class micro-structure issues LED luminescence chip is greater than refraction action, can effectively reduce and even be eliminated the problem of speck is locally present in backlight module.The backlight module of the embodiment of the present invention is applied to liquid crystal display.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of backlight modules and liquid crystal display.
Background technique
Liquid crystal display includes LCD panel for showing picture material and provides white to LCD panel
The backlight module of light source.Different relative to the position of LCD panel according to light source, backlight module is broadly divided into side-light type and straight
Following formula.Wherein, the light source of down straight aphototropism mode set is located at the underface of LCD panel.
It is exemplary, as shown in Figure 1, in prior art down straight aphototropism mode set a kind of typical structure schematic diagram, with reference to Fig. 1
Shown, down straight aphototropism mode set 100 is mainly including backboard 101, the reflector plate 102 that 101 inner surface of backboard is arranged in, setting anti-
Multiple LED luminescence chips 103 on 102 surface of piece are penetrated, the diffuser plate 105 of 103 top of LED luminescence chip is set and is arranged and is being expanded
Fall apart the prismatic lens 106 and other optical diaphragms 107 of 105 upper surfaces, wherein the effect of prismatic lens 106 is to improve backlight mould
The intensity of group light-emitting surface emergent light, specifically, making to come from using the refraction action for the micro-prism structure being formed on substrate material
Emergent light in a certain angular range of diffuser plate 105 deflects to positive direction outgoing, in this way, the light that light source issues is in micro- rib
It is constantly recycled under the action of mirror structure, the light dissipated originally to all directions is controlled in just after through prismatic lens
In the view directions of face, to achieve the effect that brightness enhances.Therefore, prismatic lens 105, which are called, does brightness enhancement film, its usual microprism knot
The cross section apex angle of structure is 90 °, at this point, the light dissipated originally to all directions is after the refraction of prismatic lens 105 in backlight mould
Convergence effect in the positive angular field of view of group is good, correspondingly, the brightening effect of prismatic lens 105 is good.
Using the down straight aphototropism mode set of structure shown in Fig. 1, it is occasionally found the prism of 103 top of face LED luminescence chip
The light reflected at piece 106 is relatively more, as shown in Fig. 2, the part of down straight aphototropism mode set is caused speck 108 occur, causes to lead
It sees bad.
Summary of the invention
The embodiment of the present invention provides a kind of backlight module and liquid crystal display, can effectively solve the problem that downward back optical mode
The problem of speck is locally present in group.
In order to achieve the above objectives, the embodiment of the present invention provides a kind of backlight module, including LED luminescence chip and prism
Piece, the prismatic lens are arranged above the LED luminescence chip, and the prismatic lens include substrate and are arranged on the substrate
Micro-prism structure, the micro-prism structure includes first kind triangular prism micro-structure and the second prism class micro-structure, described
The cross section apex angle of a kind of triangular prism micro-structure is greater than the cross section apex angle of the second prism class micro-structure.
In general, the low-angle light that LED luminescence chip issues converges in after the light-emitting surface of triangular prism micro-structure reflects
In the positive angular field of view of backlight module light-emitting surface, since the degree of divergence of the low-angle light of LED luminescence chip sending is low, in turn
It is partially formed speck in backlight module, and the backlight module of the embodiment of the present invention, prismatic lens include substrate and are arranged in institute
The micro-prism structure on substrate is stated, the micro-prism structure includes the micro- knot of triangular prism that cross section apex angle is two kinds of different angles
Structure, wherein the cross section apex angle of first kind triangular prism micro-structure is greater than the cross section apex angle of the second prism class micro-structure, because
The cross section apex angle of triangular prism micro-structure is smaller, what the low-angle light that LED luminescence chip issues was totally reflected in its light-emitting surface
Probability is bigger, and the second prism class micro-structure is greater than refraction action to the reflex for the low-angle light that LED luminescence chip issues,
Refering to what is shown in Fig. 7, the low-angle light that LED luminescence chip issues is totally reflected in the light-emitting surface of the second prism class micro-structure,
After changing the direction of propagation, then after the refraction of the light-emitting surface of the other side and reflection, refraction and reflected light do not go out in backlight module
Within the scope of hot spot corresponding to smooth surface, it can effectively solve the problems, such as that speck is locally present in backlight module.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the back light module unit structure schematic diagram of the prior art；
Fig. 2 is the hot spot schematic diagram of backlight module in Fig. 1；
Fig. 3 is a kind of back light module unit structure schematic diagram provided in an embodiment of the present invention；
Fig. 4 is backlight module echo area and the blast area distribution schematic diagram of the embodiment of the present invention；
Fig. 5 is the light structural schematic diagram of the backlight module of the embodiment of the present invention；
Fig. 6 is a kind of prism Sheet structure schematic diagram of the embodiment of the present invention；
Fig. 6 a is another prism Sheet structure schematic diagram of the embodiment of the present invention；
Fig. 6 b is another prism Sheet structure schematic diagram of the embodiment of the present invention；
Fig. 7 is that the backlight module hot spot of the embodiment of the present invention forms schematic diagram；
Fig. 8 is the light schematic diagram of the backlight module first kind triangular prism micro-structure of the embodiment of the present invention；
Fig. 9 is the light schematic diagram of backlight module the second prism class micro-structure of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Based on inventors have found that down straight aphototropism mode set as shown in Figure 1, occasionally has the local subjectivity for speck occur is bad to ask
Topic.The reason of analysis generation above problem, is that the exiting light beam intensity of 103 top of LED luminescence chip is more excessive, makes
There is local speck in the top of face LED luminescence chip 103 at down straight aphototropism mode set.Further investigation revealed that due to
The light that LED luminescence chip 103 issues is similar to Lambertian radiator, and emission maximum angle is 120 °, light and light-emitting surface
Angle is 0 ° ~ 60 ° between normal, i.e., beam angle is 0 ° ~ 60 °, and the light in low-angle beam angle therein reaches backlight mould
It is not dissipated adequately during group light-emitting surface, and then causes part and speck occur.
In the prior art, inventors have found that generally use increase LED luminescence chip between backlight module light-emitting surface away from
From or the means such as diffuser plate and diffusion sheet are arranged in down straight aphototropism mode set, still, increase LED luminescence chip to backlight
The thickness that the distance between mould group light-emitting surface certainly will will cause down straight aphototropism mode set is larger, meanwhile, if in direct-type backlight
Diffuser plate is set in mould group, carries out masking speck using the mist degree of diffuser plate, the brightness that certainly will will cause backlight module reduces, together
When will increase the weight and cost of down straight aphototropism mode set, this is all unfavorable for the lightening development of liquid crystal display.
To solve the above problems, the embodiment of the present invention provides a kind of backlight module and liquid crystal display, including LED shines
Chip and prismatic lens, the prismatic lens are arranged above the LED luminescence chip, and the prismatic lens include that substrate and setting exist
Micro-prism structure on the substrate, the micro-prism structure include first kind triangular prism micro-structure and the micro- knot of the second prism class
Structure, the cross section apex angle of the first kind triangular prism micro-structure are greater than the cross section apex angle of the second prism class micro-structure,
It can effectively solve the problems, such as that speck is locally present in backlight module.
Fig. 3 illustratively shows a kind of structural schematic diagram of backlight module of the embodiment of the present invention.The backlight module can
To provide white light source for liquid crystal display, liquid crystal display is assembled into LCD panel.
Refering to what is shown in Fig. 3, backlight module 200 provided in an embodiment of the present invention, mainly includes backboard 201, LED luminescence chip
203, prismatic lens 206 and other optical diaphragms 207, the space between dorsulum 201 and prismatic lens 206 form mixed light space
204.Exemplary, backboard 201 is a frame structure, and prismatic lens 206 are arranged in its surrounding edge side wall, and LED luminescence chip 203 is set
It sets in its bottom.
It is exemplary, refering to what is shown in Fig. 3, other optical diaphragms 207 are arranged above prismatic lens 206, meanwhile, other optical films
Piece 207 can also be arranged in below prismatic lens 206 or scattering device is in about 206 two sides of prismatic lens.It is exemplary, other optics
Diaphragm 207 can be diffusion sheet, diffusion barrier, quantum film of backlight module etc., other optical diaphragms 207 can be one such
Diaphragm is also possible to the combination of many of diaphragm.
Further, refering to what is shown in Fig. 6, prismatic lens 206 include substrate 2063 and the microprism being arranged on substrate 2063
Structure 2064, wherein the cross section of micro-prism structure 2064 is isosceles triangle, and micro-prism structure 2064 includes first kind trigone
Column micro-structure 20641 and the second prism class micro-structure 20642, wherein the cross section of first kind triangular prism micro-structure 20641 is pushed up
Angle is θ1, the cross section apex angle of the second prism class micro-structure 20642 is θ2。
Refering to what is shown in Fig. 4, backlight module 200 provided in an embodiment of the present invention, several reflections are included on prismatic lens 206
Area 2062 and blast area 2061, wherein refering to what is shown in Fig. 5, echo area 2062 the light that issues of received LED luminescence chip 203
Energy density is greater than the optical energy density of institute of blast area 2061 received LED luminescence chip 203 sending.With reference to Fig. 4, Fig. 5 and Fig. 6
It is shown, the second prism class micro-structure 20642 is provided in echo area 2062.
Specifically, the light that LED luminescence chip 203 issues is similar to Lambertian radiator, emission maximum angle is 120 °,
The range for emitting light is as shown in Figure 5.Refering to what is shown in Fig. 5, prismatic lens 206 are located at the region right above LED luminescence chip 203, connect
The angle changing rate that the LED luminescence chip 203 received issues light is small, and under identical light mixing distance, degree of divergence is low, causes
The optical energy density that region right above LED luminescence chip 203 receives is larger, and therefore, the speck of backlight module generally occurs within
In the surface of LED luminescence chip.
Further, echo area 2062 and blast area 2061 are respectively distributed to close to LED luminescence chip 203 and far from LED
The position of luminescence chip 203, wherein it is exemplary, refering to what is shown in Fig. 4, echo area 2062 is being distributed in LED luminescence chip 203 just
Top.
Refering to what is shown in Fig. 7, LED luminescence chip 203 is r, the backlight mould in the speck radius that backlight module light-emitting surface generates
Group light mixing distance be H, LED luminescence chip 203 generate speck light 1. with the light-emitting surface normal of LED luminescence chip 203 it
Between maximum angle be α, the cirtical angle of total reflection of 2064 light-emitting surface of micro-prism structure is β, the folding of 2064 material of micro-prism structure
Penetrating rate is n, then:
Refering to what is shown in Fig. 7, θ is angle is α between the light-emitting surface normal of LED luminescence chip 203 light 1. in micro- rib
When the light-emitting surface of mirror structure 2064 is totally reflected, the critical value of 2064 cross section angle of micro-prism structure.Work as micro-prism structure
When 2064 cross section angles are greater than θ, 1. in the light-emitting surface of micro-prism structure 2064 refraction and reflection will occur for light, in backlight mould
The light-emitting surface of group forms hot spot；When 2064 cross section angle of micro-prism structure is less than θ, light 1. will be in micro-prism structure 2064
Light-emitting surface be totally reflected, change the direction of propagation after, then through the other side light-emitting surface refraction and reflection after, refraction and reflection
Light is not within the scope of the hot spot corresponding to backlight module light-emitting surface.Wherein, it can be obtained according to angle sum of a triangle theorem:
Wherein, refering to what is shown in Fig. 7,For the angle between the light-emitting surface and normal of micro-prism structure 2064, then
,。
Exemplary, by taking the backlight module of light mixing distance H=30mm as an example, the speck radius that light-emitting surface generates is r=15mm,
The refractive index of 2064 material of micro-prism structure is n=1.5, then:
Further, refering to what is shown in Fig. 7, if the light that angle is α between the light-emitting surface normal of LED luminescence chip 203
Line is totally reflected in the light-emitting surface of micro-prism structure 2064, then angle is small between the light-emitting surface normal of LED luminescence chip 203
It is totally reflected in the light-emitting surface of micro-prism structure 2064 in the light of α, goes out light after changing the direction of propagation, then through the other side
After face refraction and reflection, refraction and reflected light not within the scope of the hot spot corresponding to backlight module light-emitting surface, be can reduce
It even is eliminated the problem of speck is locally present in backlight module.
With reference to shown in Fig. 6, Fig. 7, Fig. 8 and Fig. 9, the backlight module 200 of the embodiment of the present invention, the micro- knot of the first prism class
The cross section vertex angle theta of structure 206411Greater than θ, the cross section vertex angle theta of the second prism class micro-structure 206422Less than or equal to θ, it may be assumed that
Refering to what is shown in Fig. 8, backlight module provided in an embodiment of the present invention, due to first kind triangular prism micro-structure 20641
Cross section vertex angle theta1Light greater than angle between θ, and the light-emitting surface normal of LED luminescence chip 203 less than or equal to α is in the first kind
Refraction and reflection occur for the light-emitting surface of triangular prism micro-structure 20641, and the intensity for reflecting light is greater than the intensity of reflected light, the i.e. first kind
Triangular prism micro-structure 20641 is greater than reflection to the anaclasis that LED luminescence chip 203 issues, as shown in figure 8, the light position reflected
Within the scope of the hot spot corresponding to backlight module light-emitting surface.
Refering to what is shown in Fig. 9, due to the cross section vertex angle theta of the second prism class micro-structure 206422Less than or equal to θ, with LED
Light of the angle less than or equal to α goes out light in the second prism class micro-structure 20641 between the light-emitting surface normal of luminescence chip 203
Face is totally reflected, at this point, intensity of reflected light is greater than refractive optical power, i.e. the second prism class micro-structure 20642 shines to LED
The light that chip 203 issues reflects greater than refraction, as shown in figure 9, angle is small between the light-emitting surface normal of LED luminescence chip 203
In the finally light-emitting surface refraction and reflection through the other side again of the light equal to α, the light after refraction and reflection is not in backlight module
Within the scope of hot spot corresponding to light-emitting surface.
With reference to shown in Fig. 8 and Fig. 9, backlight module provided in an embodiment of the present invention, due to LED luminescence chip 203 go out
In the light-emitting surface of first kind triangular prism micro-structure 20641 refraction and anti-occurs for angle less than or equal to the light of α between smooth surface normal
It penetrates, is totally reflected in the light-emitting surface of the second prism class micro-structure 20641, so, first kind triangular prism micro-structure 20641 is right
The refraction that LED luminescence chip 203 issues light is greater than the second prism class micro-structure 20642 and issues light to LED luminescence chip 203
Refraction, the i.e. brightening effect of first kind triangular prism micro-structure 20641 are better than the brightening effect of the second prism class micro-structure.
In conclusion echo area 2062 the optical energy density that issues of received LED luminescence chip 203 be greater than blast area
2061 the optical energy density that issues of received LED luminescence chip 203, and the 2062 received LED luminescence chip 203 of institute of echo area
The light of sending and the angle of 203 light-emitting surface normal of LED luminescence chip are smaller, and backlight module corresponding to echo area 2062 goes out light
Speck easy to form in face, still, the backlight module 200 of the embodiment of the present invention is provided with the second class three in echo area 2062
Prism microstructures 20642, the light that the second prism class micro-structure 20642 issues LED luminescence chip 203 reflect greater than refraction,
The angle between the light-emitting surface normal of LED luminescence chip 203 that LED luminescence chip 203 is issued is less than or equal to the light of α, entirely
Portion is totally reflected in the light-emitting surface of the second prism class micro-structure 20641, finally the light-emitting surface refraction through the other side and anti-again
It penetrates, as shown in figure 9, the light of refraction and reflection not within the scope of the hot spot corresponding to backlight module light-emitting surface, reduces backlight
Light luminance in region corresponding to the echo area 2062 of mould group 200 can effectively reduce and even be eliminated backlight module and locally deposit
The speck the problem of.
Further, refering to what is shown in Fig. 6, backlight module provided in an embodiment of the present invention 200, the micro- knot of the first prism class
The cross section apex angle of structure 20642 is 85o ~ 95o, and the cross section apex angle of the second prism class micro-structure 20641 is 5o ~ 60o,
In, it is preferred that the cross section apex angle of first kind triangular prism micro-structure 20642 is 90o, and first kind triangular prism micro-structure 20641 is right
The anaclasis that LED luminescence chip 203 issues is greater than reflection, and major function is blast, a large amount of experiment discovery, when prismatic lens
When the cross section apex angle of triangular prism micro-structure is 90o, the convergence effect for reflecting light is best, i.e., brightening effect is best.
Further, with reference to shown in Fig. 6 a and Fig. 6 b, backlight module 200 provided in an embodiment of the present invention, the first kind three
Prism microstructures 20641 are spaced apart on substrate 2063 with the second prism class micro-structure 20642.Specifically, adjacent first
At least one second prism class micro-structure 20642 or adjacent second prism class are provided between prism class micro-structure 20641
At least one first kind triangular prism micro-structure 20641 is provided between micro-structure 20642.It is exemplary, with reference to shown in Fig. 6 a, adjacent
There are two the second prism class micro-structures 20642 for setting between a kind of triangular prism micro-structure 20641；With reference to shown in Fig. 6 b, the second class
One or two first kind triangular prism micro-structure 20641 is provided between triangular prism micro-structure 20642.It certainly, is only citing herein
Illustrate, does not represent first kind triangular prism micro-structure and the second prism class micro-structure regularity of distribution on base material is confined to
This.
Further, refering to what is shown in Fig. 6, backlight module provided in an embodiment of the present invention 200, the micro- knot of the first prism class
Structure 20641 and the second prism class micro-structure 20642 random distribution on substrate 2063.The micro-prism structure of prismatic lens 206
2064 are generally nanoscale, i.e. first kind triangular prism micro-structure 20641 and the second prism class micro-structure 20642 is nanoscale
Structure, therefore, no matter first kind triangular prism micro-structure 20641 is adopted on substrate 2063 with the second prism class micro-structure 20642
With still random distribution is spaced apart, can guarantee to be provided with the second prism class micro-structure 20642 in its echo area 2062.
Wherein, using being spaced apart, facilitate the manufacture of triangular prism micro-structure graphic arts die, while it is possible to prevente effectively from triangular prism micro-structure
It is concentrated in local distribution, improves the uniformity of backlight module light-emitting surface light.
Further, the backlight module 200 of the embodiment of the present invention, the glossiness of reflector plate 202 are 0.05 ~ 0.6, instead
The glossiness for penetrating piece 202 is lower, and the light that irreflexive light is more, and LED luminescence chip issues, warp occur on reflector plate 202
Degree of divergence after prismatic lens 204 and reflector plate 202 reflect is higher, correspondingly, the probability of speck occurs in backlight module light-emitting surface
It is smaller.
The embodiment of the present invention also provides a kind of liquid crystal display, including LCD panel and Fig. 3, Fig. 4, Fig. 5, Fig. 6,
Fig. 6 a, Fig. 6 b, Fig. 7, Fig. 8 and backlight module shown in Fig. 9, the advantages of possessing backlight module shown in Fig. 2 ~ Fig. 9.
It has been the technology of this field about the backlight module of the embodiment of the present invention and other compositions of liquid crystal display etc.
Known to personnel, it can refer to the state of the art, be no longer described in detail herein.
In the description of this specification, particular features, structures, materials, or characteristics can be real in any one or more
Applying can be combined in any suitable manner in example or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of backlight module, including LED luminescence chip and prismatic lens, the prismatic lens are arranged on the LED luminescence chip
Side, which is characterized in that the prismatic lens include the micro-prism structure of substrate and setting on the substrate, the microprism knot
Structure includes first kind triangular prism micro-structure and the second prism class micro-structure, the cross section top of the first kind triangular prism micro-structure
Angle is greater than the cross section apex angle of the second prism class micro-structure, is provided with echo area and blast area, institute on the prismatic lens
It states the received optical energy density of echo area institute and is greater than the received optical energy density of the institute of blast area, the echo area setting is
The second prism class micro-structure is stated, the blast area is provided with the first kind triangular prism micro-structure.
2. backlight module according to claim 1, which is characterized in that the first kind triangular prism micro-structure and second class
The cross section of triangular prism micro-structure is isosceles triangle, and the cross section apex angle of the first kind triangular prism micro-structure is 85 °~
95 °, the cross section apex angle of the second prism class micro-structure is 5 °~60 °.
3. backlight module according to claim 1, which is characterized in that the cross section apex angle of the first kind triangular prism micro-structure
Greater than θ, the cross section apex angle of the second prism class micro-structure is less than or equal to θ, in which: θ=180 ° -2arctan (r/
H)-2·arcsin(1/n)
In formula: r is the speck radius of the backlight module light-emitting surface, and H is the light mixing distance of backlight module, and n is the microprism
The refractive index of structure.
4. any one of according to claim 1~3 backlight module, which is characterized in that the first kind triangular prism micro-structure with
The second prism class micro-structure is spaced apart on the substrate or random distribution.
5. backlight module according to claim 1, which is characterized in that the backlight module is provided with reflector plate, the reflection
Piece is arranged below the LED luminescence chip light-emitting surface, and the glossiness of the reflector plate is 0.05~0.6.
6. a kind of backlight module, including LED luminescence chip and prismatic lens, the prismatic lens are arranged on the LED luminescence chip
Side, which is characterized in that the prismatic lens include the micro-prism structure of substrate and setting on the substrate, the microprism knot
Structure includes first kind triangular prism micro-structure and the second prism class micro-structure, and the first kind triangular prism micro-structure is to the LED
The refraction that luminescence chip issues light is greater than the refraction that the second prism class micro-structure issues light to the LED luminescence chip,
Echo area and blast area are provided on the prismatic lens, the received optical energy density of the echo area institute is greater than the institute of blast area
Received optical energy density, the echo area are provided with the second prism class micro-structure, and the blast area is provided with described
First kind triangular prism micro-structure.
7. backlight module according to claim 6, which is characterized in that the cross section apex angle of the first kind triangular prism micro-structure
Greater than θ, the cross section apex angle of the second prism class micro-structure is less than or equal to θ, in which: θ=180 ° -2arctan (r/
H)-2·arcsin(1/n)
In formula: r is the speck radius of the backlight module light-emitting surface, and H is the light mixing distance of backlight module, and n is the microprism
The refractive index of structure.
8. backlight module according to claim 6, which is characterized in that the backlight module is provided with reflector plate, the reflection
Piece is arranged below the LED luminescence chip light-emitting surface, and the glossiness of the reflector plate is 0.05~0.6.
9. a kind of liquid crystal display, which is characterized in that the liquid crystal display includes such as any one of claim 1~8 institute
State backlight module.
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| CN201510902245.8A CN105334669B (en) | 2015-12-09 | 2015-12-09 | A kind of backlight module and liquid crystal display |
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|---|---|---|---|
| CN201510902245.8A CN105334669B (en) | 2015-12-09 | 2015-12-09 | A kind of backlight module and liquid crystal display |
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| Publication Number | Publication Date |
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| CN105334669A CN105334669A (en) | 2016-02-17 |
| CN105334669B true CN105334669B (en) | 2018-12-28 |
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| CN106526973A (en) * | 2016-12-30 | 2017-03-22 | 深圳Tcl新技术有限公司 | Straight down type backlight module and liquid crystal display device |
| CN108845383A (en) * | 2018-06-26 | 2018-11-20 | 厦门天马微电子有限公司 | A kind of prismatic lens, backlight module and display device |
| CN109188772A (en) * | 2018-10-30 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN109459886B (en) * | 2018-10-31 | 2021-11-02 | 厦门天马微电子有限公司 | Backlight module, manufacturing method and display device |
| CN109343274B (en) * | 2018-11-26 | 2022-02-11 | 厦门天马微电子有限公司 | Light intensifying structure of backlight module, backlight module and display device |
| CN109509401B (en) * | 2019-01-17 | 2022-10-04 | 京东方科技集团股份有限公司 | Backlight source, backlight module, display device and backlight source manufacturing method |
| CN110308591B (en) * | 2019-07-31 | 2022-10-21 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN110824776A (en) * | 2019-11-27 | 2020-02-21 | 惠州市隆利科技发展有限公司 | Direct type mini LED backlight module |
| CN111045253B (en) * | 2019-12-30 | 2021-12-28 | 华为技术有限公司 | Backlight module and liquid crystal display device |
| CN114137760B (en) * | 2020-09-04 | 2024-03-19 | 海信视像科技股份有限公司 | Display device |
| CN115712214A (en) * | 2022-12-05 | 2023-02-24 | 厦门天马微电子有限公司 | Prism film, backlight module and display device |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |