CN110515241A - A kind of backlight module, display device and production method - Google Patents
A kind of backlight module, display device and production method Download PDFInfo
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- CN110515241A CN110515241A CN201910818838.4A CN201910818838A CN110515241A CN 110515241 A CN110515241 A CN 110515241A CN 201910818838 A CN201910818838 A CN 201910818838A CN 110515241 A CN110515241 A CN 110515241A
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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
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
Abstract
The embodiment of the invention provides a kind of backlight module, display device and production methods, wherein the backlight module includes: LED light source, and the LED light source includes the LED lamp bead of substrate and array arrangement on the substrate；At least one micro-structure between two adjacent LEDs lamp bead is set, the micro-structure include alternately laminated setting multiple refracting layers and multiple reflecting layer, wherein the one side that the reflecting layer is at least distally from the substrate is reflecting surface.For solving the existing backlight module technical problem even there are brightness unevenness.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of backlight module, display device and production method.
Background technique
Conventionally, as electronic equipment backlight space is extremely limited, cannot as large-size direct type backlight,
Light emitting diode (Light Emitting Diode, i.e. LED) lamp shadow problem is solved using light mixing distance is increased.In addition, by
There are spacing between LED lamp bead, and the light emitting angle of each LED lamp bead is relatively limited so that between LED lamp bead with LED light
There is difference in the brightness of pearl other positions, causes mura phenomenon serious.
As it can be seen that the technical problem that existing backlight module is even there are brightness unevenness.
Summary of the invention
The embodiment of the invention provides a kind of backlight module, display device and production methods, for solving existing backlight mould
Group, for solving the existing backlight module technical problem even there are brightness unevenness.
In a first aspect, the embodiment of the invention provides a kind of backlight modules, comprising:
LED light source, the LED light source include the LED lamp bead of substrate and array arrangement on the substrate；
At least one micro-structure between two adjacent LEDs lamp bead is set, and the micro-structure includes alternately laminated setting
Multiple refracting layers and multiple reflecting layer, wherein the reflecting layer be at least distally from the substrate one side be reflecting surface.
Optionally, for the micro-structure along being (h ± 0.2) mm perpendicular to the height on the orientation substrate, h is the LED
The height of lamp bead.
Optionally, the micro-structure is less than or equal to (L-1) mm along the maximum length being parallel on the orientation substrate,
Spacing of the L between two adjacent LEDs lamp bead.
Optionally, the backlight module includes central area, and the fringe region around the central area, in described
The distribution density of the micro-structure between the two adjacent LEDs lamp bead in heart district domain, greater than adjacent the two of the fringe region
The distribution density of the micro-structure between a LED lamp bead.
Optionally, the micro-structure includes one of pyramid, circular cone, terrace with edge, rotary table or a variety of.
Optionally, the micro-structure be parallel to the substrate cross sectional shape in the plane include rectangle, triangle
And one of circle or a variety of.
Optionally, the micro-structure includes along the first refractive layer stacked gradually far from the orientation substrate and the second refraction
Layer, the refractive index of the first refractive layer are greater than the refractive index of second refracting layer.
Optionally, the material of the refracting layer is optical cement.
Optionally, the reflecting layer includes one or both of reflectance ink, reflection glue.
Second aspect, the embodiment of the invention also provides a kind of display devices, comprising:
Liquid crystal display panel and above-mentioned backlight module provided in an embodiment of the present invention.
The third aspect, the embodiment of the invention also provides a kind of production methods of above-mentioned backlight module, comprising:
Using injection molding manner and spraying method, be alternatively formed the micro-structure multiple refracting layers and multiple reflecting layer；
Using spraying method or filling mode, the micro-structure is arranged between two adjacent LEDs lamp bead.
The present invention has the beneficial effect that:
The embodiment of the invention provides a kind of backlight module, display device and production method, by array arrangement in base
At least one micro-structure is set between two adjacent LEDs lamp bead on plate, in LED light source work, the light from LED light source
Line improves after being reflected and reflected by the multiple refracting layers and multiple reflecting layer of the alternately laminated setting of the micro-structure
Light utilization between two adjacent LEDs lamp bead, so as to improve the technical problem that brightness unevenness is even.
Detailed description of the invention
Fig. 1 is the array arrangement structural schematic diagram of LED lamp bead in a kind of backlight module provided in an embodiment of the present invention；
Fig. 2 is a kind of one of top view of backlight module provided in an embodiment of the present invention；
Fig. 3 is a kind of one of sectional view of the backlight module provided in an embodiment of the present invention along the direction MM；
Fig. 4 is that micro-structure in central area and fringe region is distributed feelings in a kind of backlight module provided in an embodiment of the present invention
One of top view of condition；
Fig. 5 be in a kind of backlight module provided in an embodiment of the present invention micro-structure be prism and including two refracting layers and
One of light in two reflecting layer propagates schematic diagram；
Fig. 6 be in a kind of backlight module provided in an embodiment of the present invention micro-structure be prism and including three refracting layers and
The side view in three reflecting layer；
Fig. 7 is a kind of another side view of backlight module provided in an embodiment of the present invention；
Fig. 8 is a kind of side view of display device provided in an embodiment of the present invention；
Fig. 9 is a kind of flow diagram of the production method of backlight module provided in an embodiment of the present invention.
Specific embodiment
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
It should be appreciated that preferred embodiment disclosed below is merely to illustrate and explain the present invention, it is not used to limit this
Invention.And in the absence of conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.Also,
The shapes and sizes of each component do not react actual proportions in attached drawing, and purpose is schematically illustrate the content of present invention.
In order to better understand the above technical scheme, below by attached drawing and specific embodiment to technical solution of the present invention
It is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the detailed of technical solution of the present invention
Thin explanation, rather than the restriction to technical solution of the present invention, in the absence of conflict, the embodiment of the present invention and embodiment
In technical characteristic can be combined with each other.Currently, other than the even problem of brightness unevenness easily occurs in planar backlight mould group, curved surface back
There are still similar problems in optical mode group.Specifically, during making curved surface backlight module, often iron frame is bent
Certain curvature, and stretch bending is attached into iron frame by force by straight lamp plate (PCB circuit board i.e. where LED light source).By
In lamp plate itself, there are stress rebounds, and there is also extruding to spring back with iron frame, often leads to lamp plate and iron because stress is excessive
Peeling (separation) occurs between the bottom plate of frame.In this way, the LED lamp bead on lamp plate is uneven to the distance between diffuser plate,
Causing backlight module to go out, light is uneven, so that difference occurs in the brightness of different location, the phenomenon that brightness unevenness visually occurs.
Fig. 1-Fig. 4, a kind of backlight module provided in an embodiment of the present invention are please referred to, which includes:
LED light source 10, LED light source 10 include the LED lamp bead 102 of substrate 101 and array arrangement on the substrate 101；
In the specific implementation process, it is tied as shown in Figure 1 for the one of which of 102 array arrangement of LED lamp bead on the substrate 101
Structure schematic diagram.
At least one micro-structure 20 between two adjacent LEDs lamp bead 102 is set, and micro-structure 20 includes alternately laminated sets
The multiple refracting layers 201 set and multiple reflecting layer 202, wherein the one side that reflecting layer 202 is at least distally from substrate 101 is reflecting surface.
In the specific implementation process, refracting layer 201 can be two or more, and corresponding reflecting layer 202 can also be with
It is two or more.In the specific implementation process, one side of the reflecting layer 202 far from substrate 101 is reflecting surface, and reflection
Layer 202 is reflecting surface close to the one side of substrate 101；Alternatively, one side of the reflecting layer 202 only far from substrate 101 is reflecting surface.Such as figure
2 show one of top view of backlight module.
It is illustrated in figure 3 one of sectional view of backlight module as shown in Figure 2 along the direction MM.Specifically, Fig. 2 and
Micro-structure 20 shown in Fig. 3 is triangular pyramid, and each refracting layer includes first refractive layer in multiple refracting layers 201 in micro-structure 20
2011 and the second two refracting layers and multiple reflecting layer 202 including refracting layer 2012 in each reflecting layer include first anti-
Penetrate two reflecting layer including layer 2021 and the second reflecting layer 2022.
In embodiments of the present invention, by the way that at least one micro-structure 20 is arranged between two adjacent LEDs lamp bead 102, this
If sample, light between the two adjacent LEDs lamp bead 102, by the multiple refraction of multiple refracting layers 201, Yi Jiduo
After the multiple reflections in a reflecting layer 202, the region before two LED lamp beads 102 is emitted, and light utilization is mentioned
Height, and light is gathered in the region between the two adjacent LEDs lamp bead 102, improves the brightness of corresponding region.And
And the light in 20 overcentre region of micro-structure can be made most to concentrate, then gradually weaken around, so that light is more evenly
Ground transition.Using identical mentality of designing, at least one is set between any two adjacent LED lamp bead 102 of backlight module
Micro-structure 20 has then correspondinglyd increase the brightness uniformity of entire backlight module.
In embodiments of the present invention, LED light source 10 includes the LED lamp bead of substrate 101 and array arrangement on the substrate 101
102, the size of LED lamp bead 102 is usually 100 μm~1000 μm.Due to size about the LED of hundred micron levels without overcome it is huge
The technical threshold of transfer is measured, volume production has feasibility, can be applicable in the backlight (such as television backlight) of large scale display screen,
It can be used as the backlight application of small size display screen (such as mobile phone display screen).In the specific implementation process, substrate 101 can be soft
Property circuit board (Flexible Printed Circuit Board, i.e. FPC plate), can also be resin substrate
(Bismaleimide Triazine, i.e. BT plate), etc..Correspondingly, the backlight module in the embodiment of the present invention can be and have
The curved surface backlight module of certain curvature can also be the backlight module of plane.
In embodiments of the present invention, the cabling of the external connection for realizing signal and electricity is provided on substrate 101, this is walked
Line is used for transmission the luminous signal of driving LED lamp bead 102.The LED lamp bead 102 can be several numbers, suitable according to presetting each other
Sequence is arranged on the substrate 101.For example, with the interval 5mm to each other of LED lamp bead 102, and in 1000 rows × 1000 column to arrange.When
So, the number of LED lamp bead 102, and setting LED lamp bead 102 can be arranged in base in those skilled in the art according to the actual situation
Distributing order on plate 101, details are not described herein again.In the specific implementation process, specifically can by centralization piece come
Then LED lamp bead 102 of arranging by forming techniques such as injection molding manner or spraying methods, forms micro-structure 20 and then passes through
Spraying method or filling mode micro-structure 20 are arranged between two adjacent LEDs lamp bead, to form backlight module.
In embodiments of the present invention, in order to improve the light utilization between adjacent two LED lamp bead 102,20 edge of micro-structure
It is (h ± 0.2) mm perpendicular to the height on 101 direction of substrate, h is the height of LED lamp bead 102.In the specific implementation process,
The numberical range of the height h of LED lamp bead 102 is 0.2mm~2mm, and correspondingly, micro-structure 20 is on perpendicular to 101 direction of substrate
Altitude range can be 0.1mm~2.2mm.For example, LED lamp bead 102 height be 1mm when, micro-structure 20 along perpendicular to
Whole height on 101 direction of substrate is 1.2mm.In the specific implementation process, in order to weaken between adjacent two LED lamp bead 102
The influence of shadow controls the height difference between the height of micro-structure 20 and the height of LED lamp bead 102 in certain numerical value range
It is interior, for example, both height it is roughly equal within the scope of fabrication error.Due to substantially unshadowed between adjacent two LED lamp bead 102,
To improve the brightness uniformity in adjacent two LED lamp beads, 102 regions, it is based on same inventive concept, to improve whole
The brightness uniformity of a backlight module.
In embodiments of the present invention, in order to guarantee sufficiently be placed between adjacent LED lamp bead 102 for micro-structure 20,
The micro-structure 20 is less than or equal to (L-1) mm along the maximum length being parallel on 101 direction of substrate, and L is two adjacent LEDs lamp
Spacing between pearl.In the specific implementation process, the numberical range of the spacing L between two adjacent LEDs lamp bead 102 is 1.5mm
~100mm, correspondingly, micro-structure 20 can be 0.5mm~99mm along the length range being parallel on 101 direction of substrate.For example,
When spacing between two adjacent LEDs lamp bead is 2mm, which is along the length being parallel on 101 direction of substrate
0.6mm。
It in embodiments of the present invention, can be for the LED in different zones in order to improve the bright dark uniformity of backlight module
Different numbers or various sizes of micro-structure 20 are set between lamp bead 102.Specifically, backlight module includes central area,
With the fringe region for surrounding the central area, point of the micro-structure 20 between the two adjacent LEDs lamp bead 102 of the central area
Cloth density, greater than the distribution density of the micro-structure 20 between the two adjacent LEDs lamp bead 102 of the fringe region.Such as Fig. 4 institute
Micro-structure 20 is shown as in one of top view of central area A and fringe region B distribution situation.Under normal circumstances, backlight mould
The central area of group corresponds to the viewing area of display screen, and the fringe region of backlight module corresponds to the non-display area of display screen.In micro- knot
When structure 20 is same size and same structure, since LED light source 10 enters the area between each adjacent two LED lamp bead 102
Amount light in domain is a set value, light through a refraction of micro-structure 20 with after reflection, only a certain proportion of light to
Region outgoing, when increasing the quantity of micro-structure 20 in the region, the ratio that light is emitted from the region also increases therewith,
Mean that the exitance of the zonal ray improves, the brightness in the region is consequently increased.In this way, in central area
The quantity of micro-structure 20 between adjacent LED lamp bead, when greater than micro-structure quantity between adjacent LED lamp bead 102 in the edge region,
The brightness in the region in central area between two LED lamp beads 102 is brighter, and brightness is more uniform, and correspondingly, the display of viewing area is imitated
Fruit more preferably, to improve the service efficiency of backlight module.In addition, in the structure that micro-structure 30 is shape of the same race, it is set
Number is identical, and size is not at the same time it can also the micro-structure 20 between two LED lamp bead 102 adjacent in control centre region
Size, greater than the size of the micro-structure 20 between adjacent two LED lamp bead 102 in fringe region.Since the size of micro-structure 20 is got over
Greatly, bigger between the ratio of the refraction and reflection of the light entering adjacent two LED lamp bead 102, to improve light corresponding
The exitance in region improves the display effect of viewing area while improving backlight module brightness uniformity.
Certainly, those skilled in the art can according to embodiments of the present invention in same design design, according to backlight mould
The brightness of each region needs in group, to be arranged requirement in corresponding region, the micro-structure 20 of required size, than
Such as, it if you need to improve the brightness of backlight module fringe region, is correspondingly added between two adjacent LED lamp beads in the edge region multiple
The micro-structure 20 of quantity.Further, it is also possible to set micro-structure 20 according to other actual needs, herein just without limitation.
In embodiments of the present invention, multiple refracting layers 201 and multiple reflecting layer of the micro-structure 20 including alternately laminated setting
202, wherein the one side that reflecting layer 202 is at least distally from substrate 101 is reflecting surface.In the specific implementation process, with adjacent LED lamp
One is arranged between pearl 102 as micro-structure 20, one of implementation be can be, directly in 102 shapes of adjacent LED lamp bead
At micro-structure 20, specifically, spraying forms one layer of reflecting layer 1 first between the adjacent LED lamp bead 102；Then in the reflection
Refracting layer 1 is sprayed on layer 1, then sprays to form one layer of reflecting layer 2 again on the refracting layer 1；Then it is sprayed on the reflecting layer 2
Refracting layer 2.Another implementation can be, and be initially formed micro-structure 20, and micro-structure 20 is then filled in adjacent LED lamp
Between pearl 102.The forming process of micro-structure 20 can be at this time, and first injection molding goes out refracting layer 3 and refracting layer 4, then exist
3 upper and lower surface of refracting layer spray reflecting layer, and 4 upper and lower surface of refracting layer spray reflecting layer, then, will treated refraction
Layer 3 is stacked together with refracting layer 4, then forms single micro-structure.Certainly, those skilled in the art can also be according to practical need
It wants, is formed as micro-structure 20 between adjacent LED lamp bead 102 in different ways, just different one have been illustrated herein.
In embodiments of the present invention, in order to improve the light utilization of backlight module, reflecting layer 202 is at least distally from substrate
101 one side is reflecting surface, in this way, which light after refracting layer can also be through reflecting surface secondary reflection again, to improve phase
Answer the light utilization in region.Certainly, reflecting layer 202 may be reflecting surface close to the one side of substrate 101.
In embodiments of the present invention, the material of refracting layer 201 be optical cement, UV glue (ultraviolet cured adhesive), prism glue, etc.
Deng.Reflecting layer 202 includes one or both of reflectance ink, reflection glue.In order to improve the light of 20 region of micro-structure
Utilization rate, micro-structure 20 include two refracting layers and two reflecting layer, and specifically, which includes along far from substrate
In the first refractive layer 2011 and the second refracting layer 2012 that 101 directions stack gradually, the refractive index of first refractive layer 2011 is greater than
The refractive index of second refracting layer 2012.The first reflecting layer 2021 and second is in the reflecting layer 202 stacked gradually with separate substrate 101
Reflecting layer 2022, micro-structure 20 are propagation path of the light from LED lamp bead 102 after micro-structure 20 for prism
As shown in Figure 5.Light from LED lamp bead 102 is incident to first refractive layer 2011 and the second refraction with identical incidence angle i respectively
Layer 2012, respectively with output angle θ1And θ2Outgoing, due to the refractive index n of first refractive layer 20111Greater than the second refracting layer 2012
Refractive index n2, it is known that, θ2Greater than θ1, in this way, the light between adjacent two LED lamp bead 102 is more assembled, light utilization
It is higher, the brightness in the region is correspondinglyd increase, to ensure that the bright dark uniformity in the region.In embodiments of the present invention, originally
Field technical staff can select the material of different refractivity according to actual needs to form refracting layer 201, and select phase
The reflecting layer 202 for answering material to be formed, is just no longer described in detail herein.
In embodiments of the present invention, in order to improve the light utilization of 20 region of micro-structure, the micro-structure 20 is specific
Including three refracting layers and three reflecting layer.Specifically, which includes the third stacked gradually along 101 direction of substrate
Refracting layer 2013, fourth reflect layer 2014, the 5th refracting layer 2015, and the reflecting layer 202 to be stacked gradually far from substrate 101
For third reflecting layer 2023, the 4th reflecting layer 2024, the 5th reflecting layer 2025, being illustrated in figure 6 the micro-structure 20 is prism
One of side structure schematic view.In the specific implementation process, since LED light source 10 enters each adjacent two LED lamp bead
The amount light in region between 102 is a set value, the refracting layer of the micro-structure 20 between two adjacent LEDs lamp bead 102
Number is more, and the reflection number of plies is more, and the ratio that light is emitted from the region also increases therewith, exitance of the light in corresponding region
It is higher, in this way, which the brightness in the region will increase therewith.By the way that multiple numbers of plies are arranged between two adjacent LEDs lamp bead 102
Refracting layer and reflecting layer, the exitance of corresponding region is improved, to improve the brightness uniformity of backlight module.Certainly, ability
Field technique personnel can set the number of plies of micro-structure 20 according to the actual needs situation of the brightness to backlight module different zones,
Herein just without limitation.
In embodiments of the present invention, in order to improve the design of backlight module, micro-structure 20 include pyramid, circular cone,
One of terrace with edge, rotary table are a variety of.Certainly, those skilled in the art can also design of different shapes according to actual needs
Micro-structure 20, just no longer details herein.In the specific implementation process, micro-structure 20 is being parallel to 101 institute of substrate in the plane
Cross sectional shape includes one of rectangle, triangle and circle or a variety of.Due to different structure shape micro-structure 20 into
The case where refraction and reflection case for entering the light of adjacent two LED lamp bead 102 are possible to different, and light is emitted from corresponding region
It is possible that different, those skilled in the art can select according to the actual needs situation of the brightness to backlight module different zones
The micro-structure 20 of respective shapes, herein just without limitation.
For the problem that existing backlight module easily causes backlight module brightness unevenness even in bending, it is being embodied
In the process, the backlight module of the embodiment of the present invention can also be applied in curved surface backlight module, such as to curved-surface display demand
In the backlight module of sizable vehicle-carrying display screen.Due to being provided with micro-structure 20 between adjacent two LED lamp bead 102, to mention
The beam projecting rate and utilization rate of high corresponding region improve curved surface to ensure that the light-emitting uniformity of curved surface backlight module
The bright dark uniformity of backlight module.
In above-mentioned backlight module provided in an embodiment of the present invention, as shown in fig. 7, can also include being located at LED light source 10
The optical film material 30 of light-emitting surface, optical film material 20 can specifically include prism structure, antireflective coating, diffusion sheet etc., herein just not
It defines.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display device, which may is that hand
Any product having a display function such as machine, tablet computer, television set, display, laptop, Digital Frame, navigator
Or component.Other essential component parts for the display device be it will be apparent to an ordinarily skilled person in the art that
Have, this will not be repeated here, also should not be taken as limiting the invention.The implementation of the display device may refer to above-mentioned backlight
The embodiment of mould group, overlaps will not be repeated.
Specifically, a kind of display device provided in an embodiment of the present invention, as shown in figure 8, including 40 He of liquid crystal display panel
Above-mentioned backlight module 50 provided in an embodiment of the present invention.It should be noted that not embodying the display device in attached drawing is curved surface
Display device, but in fact, display device provided by the embodiment of the present invention is also possible to curved-surface display device, it is no longer superfluous herein
It states.
In embodiments of the present invention, by be arranged between array arrangement two adjacent LEDs lamp bead on the substrate 101 to
A few micro-structure 20, when LED light source 10 works, the light from LED light source 10, alternately laminated by the micro-structure 20 is set
After the multiple refracting layers and multiple reflecting layer set are reflected and reflected, the light between two adjacent LEDs lamp bead is improved
Utilization rate, so as to improve the technical problem that brightness unevenness is even.
Based on the same inventive concept, the embodiment of the invention provides a kind of production methods of above-mentioned backlight module.Due to this
The principle that production method solves the problems, such as is similar to a kind of aforementioned backlight module, therefore the implementation of the production method may refer to backlight
The implementation of mould group, overlaps will not be repeated.
Specifically, the production method of a kind of above-mentioned backlight module provided in an embodiment of the present invention, as shown in figure 9, can wrap
It includes:
S101: use injection molding manner and spraying method, be alternatively formed the micro-structure multiple refracting layers and multiple reflections
Layer；
S102: using spraying method or filling mode, and the micro-structure is arranged between two adjacent LEDs lamp bead.
In embodiments of the present invention, it can be and be initially formed micro-structure, then micro-structure is arranged in two adjacent LEDs lamp bead
Between；It can also be and be initially formed LED light source, then form reflecting layer and the refracting layer of micro-structure between adjacent LED lamp bead.Tool
For body, it can be and multiple refracting layers are formed using injection molding manner, spray to form reflecting layer on the surface of each refracting layer, then
Will treated that refracting layer is attached onto, to form micro-structure, then by the micro-structure be filled in adjacent two LED lamp bead it
Between.It is also possible that first spraying forms multiple refracting layers, then spray to form reflecting layer on the surface of each refracting layer, then will
Treated, and refracting layer is attached onto, to form micro-structure.It is also possible that directly being sprayed between adjacent two LED lamp bead
Reflecting layer is formed, refracting layer is then successively staggeredly sprayed, to form micro-structure.
In embodiments of the present invention, by the way that at least one micro-structure is arranged between two adjacent LEDs lamp bead, in LED light
When source works, come from LED light source light, multiple refracting layers of the alternately laminated setting by the micro-structure and multiple reflecting layer it
Afterwards, the light utilization between two adjacent LEDs lamp bead has obtained effective raising, improves between adjacent two LED lamp bead
Brightness, so as to improve the technical problem that brightness unevenness is even.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (11)
1. a kind of backlight module characterized by comprising
LED light source, the LED light source include the LED lamp bead of substrate and array arrangement on the substrate；
At least one micro-structure between two adjacent LEDs lamp bead is set, and the micro-structure includes the more of alternately laminated setting
A refracting layer and multiple reflecting layer, wherein the one side that the reflecting layer is at least distally from the substrate is reflecting surface.
2. backlight module as described in claim 1, which is characterized in that the micro-structure is along perpendicular on the orientation substrate
Height is (h ± 0.2) mm, and h is the height of the LED lamp bead.
3. backlight module as described in claim 1, which is characterized in that the micro-structure edge is parallel on the orientation substrate
Maximum length is less than or equal to (L-1) mm, spacing of the L between two adjacent LEDs lamp bead.
4. backlight module as described in claim 1, which is characterized in that the backlight module includes central area, and surrounds institute
The distribution of the fringe region for stating central area, the micro-structure between the two adjacent LEDs lamp bead of the central area is close
Degree, greater than the distribution density of the micro-structure between the two adjacent LEDs lamp bead of the fringe region.
5. backlight module as described in claim 1, which is characterized in that the micro-structure includes pyramid, circular cone, terrace with edge, rotary table
One of or it is a variety of.
6. backlight module as described in claim 1, which is characterized in that micro-structure plane where being parallel to the substrate
On cross sectional shape include one of rectangle, triangle and circle or a variety of.
7. backlight module as described in claim 1, which is characterized in that the micro-structure include along far from the orientation substrate according to
The first refractive layer and the second refracting layer of secondary stacking, the refractive index of the first refractive layer are greater than the refraction of second refracting layer
Rate.
8. backlight module as described in claim 1, which is characterized in that the material of the refracting layer is optical cement.
9. backlight module as described in claim 1, which is characterized in that the reflecting layer includes reflectance ink, reflects in glue
It is one or two kinds of.
10. a kind of display device characterized by comprising
Liquid crystal display panel, and such as the described in any item backlight modules of claim 1-9.
11. a kind of production method of such as described in any item backlight modules of claim 1-9 characterized by comprising
Using injection molding manner and spraying method, be alternatively formed the micro-structure multiple refracting layers and multiple reflecting layer；
Using spraying method or filling mode, the micro-structure is arranged between two adjacent LEDs lamp bead.
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| CN201910818838.4A CN110515241B (en) | 2019-08-30 | 2019-08-30 | Backlight module, display device and manufacturing method |
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| CN201910818838.4A CN110515241B (en) | 2019-08-30 | 2019-08-30 | Backlight module, display device and manufacturing method |
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