CN109461376A - A kind of backlight module and preparation method thereof and display device - Google Patents
A kind of backlight module and preparation method thereof and display device Download PDFInfo
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- CN109461376A CN109461376A CN201811405657.0A CN201811405657A CN109461376A CN 109461376 A CN109461376 A CN 109461376A CN 201811405657 A CN201811405657 A CN 201811405657A CN 109461376 A CN109461376 A CN 109461376A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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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
- G02F1/133605—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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
Abstract
The present invention provides backlight module and preparation method thereof and display device, backlight module includes: luminescent screen, including first substrate, the multiple luminescence units and the first reflective coating of setting on the first substrate, with the first hollowed out area of multiple array arrangements on first reflective coating, luminescence unit and the first hollowed out area correspond, and are set in corresponding first hollowed out area；The transflection film layer being set on luminescent screen, including transmission film layer and multiple second reflective graphics, transmit the second hollowed out area in film layer with multiple array arrangements, second reflective graphics and the second hollowed out area are corresponding, it is set in corresponding second hollowed out area, there are prepsetting gaps between transflection film layer and luminescent screen；Luminescence unit and the second reflective graphics correspond, and the orthographic projection of luminescence unit on the first substrate is located in the orthographic projection region of the second reflective graphics on the first substrate.The light emission luminance of uniform backlight mould group entirety reduces light efficiency loss, reduces the power consumption and thickness of backlight module.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of backlight module and preparation method thereof and display devices.
Background technique
Existing backlight module, the area source that especially mini light emitting diode (Mini LED) is formed, is arranged straight-down negative
Backlight module (Back Light Unit, abbreviation BLU) structure is easy to implement positioning single-point adjustment (Local Dimming), with
Realize high dynamic range imaging ((High-Dynamic Range, abbreviation HDR) display, so that backlight module has high comparison
Rendering characteristics.The reflecting surface of backlight module uses photosensitive-ink to coat at present, and reflectivity only has 80%, causes entire backlight module
Light efficiency it is relatively low, power consumption rise.
As it can be seen that the existing backlight module technical problem that there are light efficiencies is relatively low, power consumption is larger.
Summary of the invention
The embodiment of the present invention provides a kind of backlight module and preparation method thereof and display device, to solve existing backlight mould
The technical problem that there are light efficiencies is relatively low for group, power consumption is larger.
In order to achieve the above object, concrete scheme provided in an embodiment of the present invention is as follows:
In a first aspect, the embodiment of the invention provides a kind of backlight modules, comprising::
Luminescent screen, including first substrate, setting multiple luminescence units and the first reflective coating on the first substrate,
With the first hollowed out area of multiple array arrangements, the luminescence unit and first vacancy section on first reflective coating
Domain corresponds, and is set in corresponding first hollowed out area；
The transflection film layer being set on the luminescent screen, including transmission film layer and multiple second reflective graphics, the transmission
With the second hollowed out area of multiple array arrangements in film layer, second reflective graphics and second hollowed out area one are a pair of
It answers, is set in corresponding second hollowed out area, there are prepsetting gaps between the transflection film layer and the luminescent screen；
The luminescence unit and second reflective graphics correspond, and the luminescence unit is on the first substrate
Orthographic projection is located in the orthographic projection region of second reflective graphics on the first substrate.
Optionally, the transflection film layer further includes the second substrate, and the second substrate is set on the luminescent screen, described
Transmission film layer and multiple second reflective graphics are all set in the second substrate, and the second substrate is used to form described
Prepsetting gap between transflection film layer and the luminescent screen.
Optionally, first reflective coating and/or second reflective graphics include at least reflective metal layer.
Optionally, first reflective coating include the first insulating medium layer being sequentially formed on the first substrate,
First reflective metal layer and the second insulating medium layer；
First insulating medium layer surrounds the lower surface of first reflective metal layer, the second insulating medium layer packet
Enclose the upper surface and side surface of first reflective metal layer.
Optionally, second reflective graphics include the second reflective metal layer and third insulating medium layer.
Optionally, first reflective metal layer and/or second reflective metal layer are made of aluminium or silver；With/
Or,
First insulating medium layer and/or the third insulating medium layer are made of aluminium oxide；And/or
Second insulating medium layer is made of titanium oxide and silica.
Optionally, the backlight module further includes the Diffusion barrier layer and compound rib being sequentially formed in the transflection film layer
Mirror.
Optionally, the backlight module further includes the quantum dot being set between the transflection film layer and the Diffusion barrier layer
Film layer.
Second aspect, the embodiment of the invention provides a kind of display devices, including as described in any one of first aspect
Backlight module.
The third aspect, the embodiment of the invention provides a kind of production methods of backlight module, for making such as first aspect
Any one of described in backlight module, which comprises
The first reflective coating and luminescence unit are formed on the first substrate, wherein are had on first reflective coating more
First hollowed out area of a array arrangement, the luminescence unit and first hollowed out area correspond, and are set to corresponding
In first hollowed out area；
Transmission film layer and the second reflective graphics are formed on first reflective coating, wherein the transmission film layer and institute
It states between the second reflective graphics there are prepsetting gap, the second hollowed out area with multiple array arrangements in the transmission film layer,
Second reflective graphics and second hollowed out area correspond, and are set in corresponding second hollowed out area；
The luminescence unit and second reflective graphics correspond, and the luminescence unit is on the first substrate
Orthographic projection is located in the orthographic projection region of second reflective graphics on the first substrate.
In the present embodiment, backlight module includes luminescent screen and transflection film layer, and the first substrate of luminescent screen is equipped with multiple hairs
Light unit and the second reflective coating, transflection film layer include transmission film layer and multiple second reflective graphics, also, luminescence unit and the
Two reflective graphics correspond, and the orthographic projection of luminescence unit on the first substrate is located at second reflective graphics described first
In orthographic projection region on substrate.In this way, the emergent ray of luminescence unit projects on corresponding second reflective graphics, via
Two reflective graphics are reflected on the first reflective coating, reduce the light emission luminance right above luminescence unit.It is reflected into the first reflectance coating
Light on layer is reflected into again in transmission film layer, by transmission film layer outgoing, improves shining for the exterior domain of luminescence unit
Brightness.As a result, can uniform backlight mould group entirety light emission luminance, even light effect is preferable, reduce light efficiency loss, improve it is whole
Mould group power consumption and thickness are reduced in the case where body light emission luminance.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the first reflective coating of backlight module provided in an embodiment of the present invention；
Fig. 4 to Fig. 8 is the manufacturing process schematic diagram of luminescent screen provided in an embodiment of the present invention；
Fig. 9 is the reflectivity results figure of the first reflective coating of backlight module provided in an embodiment of the present invention；
Figure 10 is the sample contrast schematic diagram of the luminescent screen of existing ink luminescent screen and the embodiment of the present invention；
Figure 11 is the contrast schematic diagram of the actual measurement reflectivity of the luminescent screen of existing ink luminescent screen and the embodiment of the present invention；
Figure 12 is the structural schematic diagram of the second reflective graphics of backlight module provided in an embodiment of the present invention；
Figure 13 is the reflectivity results figure of the second reflective graphics of backlight module provided in an embodiment of the present invention；
Figure 14 is lambert's body chip light emitting angle and light distribution map；
Figure 15 is the structural schematic diagram of the second reflective graphics of backlight module provided in an embodiment of the present invention；
Figure 16 is the distribution schematic diagram of the second reflective graphics of backlight module provided in an embodiment of the present invention；
Figure 17 to 19 is the structural schematic diagram of the second reflective graphics of backlight module provided in an embodiment of the present invention；
Figure 20 is the effect contrast figure before and after luminescent screen provided in an embodiment of the present invention collocation transflection film layer；
Figure 21 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
A kind of Figure 22 flow diagram of the production method of backlight module provided in an 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 some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention.As shown in Figure 1, institute
Stating backlight module 100 includes:
Luminescent screen 110, including first substrate 111,112 and of multiple luminescence units being arranged on the first substrate 111
First reflective coating 113, it is described to shine with the first hollowed out area of multiple array arrangements on first reflective coating 113
Unit 112 and first hollowed out area correspond, and are set in corresponding first hollowed out area；
The transflection film layer 120 being set on the luminescent screen 110, including transmission film layer 122 and multiple second reflective graphics
121, the second hollowed out area with multiple array arrangements in the transmission film layer 122, second reflective graphics 121 and described
Second hollowed out area corresponds, and is set in corresponding second hollowed out area, and the transflection film layer 120 shines with described
There are prepsetting gaps 123 between plate 110；
The luminescence unit 112 is corresponded with second reflective graphics 121, and the luminescence unit 112 is described the
Orthographic projection on one substrate 111 is located at second reflective graphics 121 in the orthographic projection region on the first substrate 111.
In the present embodiment, backlight module 100 includes luminescent screen 110 and transflection film layer 120, and the transflection film layer 120 is arranged
The side where the light-emitting surface of the luminescent screen 110, and there are prepsetting gap 123 between transflection film layer 120 and luminescent screen 110, with
Guarantee transmission process of 110 emergent ray of luminescent screen between luminescent screen 110 and transflection film layer 120.Specifically, the luminescent screen
110 include first substrate 111, the first reflective coating 113 and multiple luminescence units 112, the first reflective coating 113 and it is multiple shine
Unit 112 is all set on first substrate 111.Multiple luminescence units 112 array arrangement on first substrate 111, the first reflection
Film layer 113 is then located at the region on first substrate 111 other than multiple luminescence units 112.
The first substrate 111 can be printed circuit board (Printed Circuit Board, abbreviation PCB), flexible electrical
Road plate (Flexible Printed Circuit abbreviation FPC) or glass (Glass) substrate guarantee needed for luminescent screen 110
Flatness and intensity, to carry out the fixation of subsequent luminescence unit 112 and the formation operation of the first reflective coating 113.It is described
Luminescence unit 112 can be luminescence chip, such as mini light emitting diode (Mini LED), and being formed by backlight module 100 is
Mini LED backlight mould group 100.
The transflection film layer 120 of backlight module 100 includes transmission film layer 122 and multiple second reflective graphics 121, the transmission film
It is corresponded on layer 122 with the second hollowed out area of multiple array arrangements, the second reflective graphics 121 and the second hollowed out area.
In addition, the second reflective graphics 121 of luminescence unit 112 and transflection film layer 120 on luminescent screen 110 correspond, luminescence unit
112 are located at the second reflective graphics 121 in the orthographic projection region on first substrate 111 in the orthographic projection on first substrate 111, and
The reflecting surface of second reflective graphics 121 is towards the luminescence unit 112.The first reflective coating is additionally provided on luminescent screen 110
113, it is used for reflection light.Diffuser plate is replaced using transflection film layer 120, mould group thickness is effectively reduced.
In this way, emergent ray projects the anti-of the second reflective graphics 121 of corresponding region when luminescence unit 112 is lit
It penetrates on face.The emergent light of the second reflected image is projected, fractional transmission is partially reflected into via the second reflective graphics 121 luminous
On first reflective coating 113 of plate 110, the light emission luminance of 112 corresponding region of luminescence unit is reduced.It is reflected into the first reflective coating
Light on 113 is reflected into transmission film layer 122 via the surface of emission of the first reflective coating 113 again, and via transmission film layer 122
It projects, the light emission luminance in other regions except luminescence unit 112 improves.In this way, the Integral luminous brightness phase of backlight module 100
To uniform.
Optionally, the first reflective coating 113 and the second reflective coating can include at least reflective metal layer, reflective metal layer
It can be made of reflecting metal, such as silver, copper or aluminium.
When specifically preparing backlight module 100, the first reflective coating 113 is formed on first substrate 111, is formed by first
There is multiple first hollowed out areas, and multiple first hollowed out area array arrangement on reflective coating 113.Each first vacancy section
Domain corresponds to a luminescence unit 112, and luminescence unit 112 is set in corresponding first hollowed out area.It can be first in first substrate
Multiple luminescence units 112 are set on 111, and then other regions on first substrate 111, which are formed, has multiple first vacancy sections
First reflective coating 113 in domain.It is of course also possible to which first being formed on first substrate 111 has the of multiple first hollowed out areas
Then one reflective coating 113 corresponds to multiple first hollowed out area and multiple luminescence units 112 is arranged.
When preparing transflection mould group, it can be initially formed transmission film layer 122, being formed by transmission film layer 122 includes multiple arrays
Second hollowed out area of arrangement, is correspondingly formed second reflective graphics 121 in each second hollowed out area.Or it can also be first
The second reflective graphics 121 for forming multiple array arrangements, then re-form transflection film layer 120, and multiple the second of transflection film layer 120
Hollowed out area and the second reflective graphics 121 correspond.First reflective coating 113 and transflection film are made using technique for vacuum coating
Layer 120 realizes graphical window production, simple process, easy industrialization using photoetching process.
The backlight module that the embodiments of the present invention provide, the light that luminescence unit issues project corresponding second reflection
It on figure, is reflected on the first reflective coating via the second reflective graphics, reduces the light emission luminance right above luminescence unit.Reflection
Light on to the first reflective coating be reflected into again transmission film layer on, by transmission film layer outgoing, improve luminescence unit it
The light emission luminance of exterior domain.As a result, can uniform backlight mould group entirety light emission luminance, even light effect is preferable, reduces light efficiency
Loss, is improving the power consumption and thickness that backlight module is reduced while Integral luminous brightness.
On the basis of the above embodiments, as shown in Fig. 2, the transflection film layer 120 can also include the second substrate 124,
The second substrate 124 is set on the luminescent screen 110, the transmission film layer 122 and multiple second reflective graphics 121
It is all set in the second substrate 124, the second substrate 124 is used to form the transflection film layer 120 and the luminescent screen
Prepsetting gap 123 between 110.
In present embodiment, transflection film layer 120 adds the second substrate 124 and is used to form transflection film layer 120 and luminescent screen 110
Between prepsetting gap 123, the transmission path of 112 emergent ray of luminescence unit is provided, reflection and the transmission process of light are completed.
The second substrate 124 can not only can guarantee the normal transmission of light using the production of the transparent boards such as glass, acrylic board, but also
It can guarantee the planarization and intensity of substrate.For the reflectivity of second reflective graphics 121 90 ± 1%, the second substrate 124 has light efficiency
5% to 6% absorption loss water has 4% to 5% light transmission rate right above luminescence unit 112.Second reflective graphics 121 are set
It is placed in the second substrate 124, and face luminescence unit 112 is arranged, and can reduce absorption loss water of the second substrate 124 to light efficiency.
When it is implemented, the second substrate 124 can first be arranged on luminescent screen 110, then formed in the second substrate 124
Second reflective graphics 121 and transmission film layer 122, that is, form transflection film layer 120.In this way, the processing technology letter of transflection film layer 120
Single, the whole stability of backlight module 100 is stronger, and thinner thickness.
In a specific embodiment, as shown in figure 3, first reflective coating 113 may include being sequentially formed in
The first insulating medium layer 114, the first reflective metal layer 115 and the second insulating medium layer 116 on the first substrate 111；
First insulating medium layer 114 surrounds the lower surface of first reflective metal layer 115, and second insulation is situated between
Matter layer 116 surrounds the upper surface and side surface of first reflective metal layer 115.
Optionally, first insulating medium layer 114 is made of aluminium oxide；And/or
Second insulating medium layer 116 is made of titanium oxide and silica.
In present embodiment, the first reflective coating 113 adds the compound realization high reflectance of media coating using reflecting metal.The
It is fixed that the region of luminescence unit 112 is arranged on one substrate 111, as shown in figure 4, first in the entire surface of first substrate 111
The first insulating medium layer 114 of upper production, which is made of aluminium oxide, such as Al2O3.As shown in figure 5,
Then the first reflective metal layer 115 is plated again on the first insulating medium layer 114, using aluminium oxide as the first reflective metal layer 115
With the transition of first substrate 111, the adhesive force of the first reflective metal layer 115 can be effectively improved.As shown in fig. 6, then passing through
Photoresist is coated, exposure development etches to obtain 112 region of luminescence unit.As shown in fig. 7, then in the first reflective metal layer 115
The second insulating medium layer 116 of upper production, can make 1 to 10 layer of dielectric layer, the specific number of plies can be according to reflectivity, production efficiency
Demand etc. is adjusted.As shown in figure 8, etching to obtain new 112nd area of luminescence unit again by coating photoresist exposure development
Domain.Each thicknesses of layers of luminescent screen can be as shown in table 1:
Table 1
The first spacing (L1 as shown in FIG. 6) between the first reflective metal layer 115,112 region of adjacent light-emitting units,
Less than the second spacing (L2 as shown in Figure 8) in the second insulating medium layer 116, between 112 region of adjacent light-emitting units.This
Sample, insulating medium layer promote the reflectivity of the whole film layer of luminescent screen 110 while protecting the first reflective metal layer 115, pass through
Spacing between 112 region of luminescence unit increases, and realizes insulating medium layer to the first reflective metal layer 115 and luminescence unit 112
Between isolation, effectively insulated to 112 periphery of luminescence unit, reduce the short-circuit risks of luminescence unit 112.
The reflectance test result of first reflective coating 113 of luminescent screen 110 reflects as shown in figure 9, in visible light wave range
Rate reaches 96% or more.First insulating medium layer 114 surrounds the lower surface of first reflective metal layer 115, can be improved
The adhesive force of one reflective metal layer 115, and can between 112 bottom trace of the first reflective metal layer 115 and luminescence unit into
The isolation of one step.Second insulating medium layer 116 can be formed by stacking for 1 to 10 layer of dielectric insulating film layer, the second insulating medium layer 116
The upper surface and side surface for surrounding the first reflective metal layer 115 can reduce the risk of the first reflective metal layer 115 scratch, together
Wavelength reflectivity among 400nms to 500nm wave band of the first reflective metal layer of Shi Tigao 115 in visible light.
As shown in Figure 10, the back provided for existing ink luminescent screen 110 (a as shown in Figure 10) and present embodiment
Optical mode group 100, the comparative result figure of the luminescent screen 110 (b as shown in Figure 10) of high reflectance, it can be seen that this implementation
The luminescent screen 110 for the backlight module 100 that mode provides, surface specular reflections effect is obvious, and flatness and reflectivity have larger
It is promoted.As shown in figure 11, the backlight mould provided for existing ink luminescent screen (S1 as shown in Figure 11) and present embodiment
The reflectance test comparative result figure of the luminescent screen 110 (S2 as shown in Figure 11) of group 100, it can be seen that entire visible
Optical band, reflectivity has to be promoted by a relatively large margin.
In another embodiment specific implementation mode, as shown in figure 12, second reflective graphics 121 may include second reflective
Metal layer 125 and third insulating medium layer 126.Optionally, the third insulating medium layer 126 is made of aluminium oxide.
In present embodiment, the second reflective graphics 121 of transflection film layer 120 include the second reflective metal layer 125 and third
Insulating medium layer 126, the second reflective metal layer 125, which can be adopted, to be formed from aluminium, and the third insulating medium layer 126 can use
Al2O3, as the protective layer of the second reflecting metal, and transmission film layer 122 can be used as simultaneously.The film layer of second reflective graphics is thick
As shown in table 2, reflectivity is as shown in figure 13 for degree.
| The number of plies | Material and thickness |
| Second reflective metal layer | Al:150nm |
| Third insulating medium layer | Al2O3:20nm |
Table 2
On the basis of the above embodiments, luminescence unit 112 can be lambert's body chip, light emitting angle distribution such as Figure 14
It is shown.As shown in Figure 14, between ± 45 °, 25% light is distributed between 45 ° to 60 ° 75% light.That is,
Most light can be in the space of surface ± 45 ° of luminescence unit 112.Therefore, the area of the second reflective graphics 121 needs
The most of light issued right above luminescence unit 112 is covered, setting size can be according to the shape of the second reflective graphics 121
Difference can be there are many situation.
When the first reflective graphics of institute are round, as shown in Figure 15 and Figure 16, the size of the second reflective graphics 121 is D=L+
2*d*tan α, wherein L is the size of luminescence unit 112, and d is default between the second reflective graphics 121 and luminescence unit 112
The width in gap 123, α are the angle of emergent ray.In order to guarantee that most of emergent light of luminescence unit 112 is occluded, the angle of α
Degree range can be set to 45 ° of 60 ° of < α <.α is greater than 45 °, can guarantee that the emergent light of luminescence unit 11275% is occluded, with
Reduce by 112 Strehl ratio of luminescence unit.α is less than 60 °, it is ensured that the surface of the second reflective graphics 121 is unlikely to too big.
The width d of prepsetting gap 123 between second reflective graphics 121 and luminescence unit 112 is the important of influence optical path
Factor has direct relation with the size of the second reflective graphics 121.If the second substrate 124 is used as prepsetting gap 123, in advance
If the width in gap 123 is the thickness of the second substrate 124.In addition, due to being equipped with protective glue at the top of luminescence unit 112,
Directly membrane material will can be attached at the top of luminescence unit 112, not need still further preset clearance.
For example, d=0.5 millimeters, L=0.53 millimeters of 112 size of luminescence unit, the dimension D of the second reflective graphics 121 takes
It is worth range are as follows: 0.53+2*0.5*tan45 ° of < D < 0.53+2*0.5*tan 60, i.e. 1.53 millimeters of 2.26 millimeters of < D <.
As shown in figure 16, the second reflective graphics 121 are corresponded with luminescence unit 112.If with 1021MiniLED chip work
For luminescence unit 112, size is about 0.25*0.53, between adjacent light-emitting units 112 between be divided into 4.2*4.75 millimeters,
Two reflective graphics 121 are circular dashed line region, the interval between interval and luminescence unit 112 between the second reflective graphics 121
It is identical, it is 4.2*4.75 millimeters.
The second substrate 124 of the transflection film layer 120 can be 0.3 millimeter to 0.5 millimeter of glass substrate, luminescence unit
The second reflective graphics 121 that reflectivity is 90 ± 1% are made right above 112, the region except the second reflective graphics 121 is transmission
Film layer 122.As shown in figure 17, the second reflective graphics 121 can be rectangle, and the cornerwise intersection point of rectangle needs and luminescence unit
112 geometric center contraposition.As shown in figure 18, the second reflective graphics 121 can be ellipse, and oval major and minor axis intersection point needs
It to be aligned with the cluster center of luminescence unit 112.As shown in figure 19, the second reflective graphics 121 are circle, and the circular center of circle needs
It is aligned with the cluster center of luminescence unit 112.
By the brightness uniformity brightness of the backlight module 100 of transflection film layer 120, it is known that under any shape,
One property can reach 88% or more.Existing haze diffuser plate is compared, homogeneity promotes 15% or more.As shown in figure 20, it is
The practical effect of (a as shown in figure 20) and rear (b as shown in figure 20) before the collocation transflection film layer 120 of Mini LED lighting board 110
Fruit figure, it can be seen that it is fairly obvious to the screening effect of lamp shadow.As shown in table 3, the luminescent screen provided for this programme with it is existing
The comparing result of ink reflectance brightness, it can be seen that luminance raising about 24.8, homogeneity promote 15%.
Table 3
In addition, as shown in figure 21, the backlight module 100 can also include being sequentially formed in the transflection film layer 120
Diffusion barrier layer 130 and composite prism 140.
Luminescence unit 112 via the second reflective graphics 121 and the first reflective coating 113 reflex, via transmission film
Layer 122 projects, and luminescence unit 112 and the light emission luminance in other regions are relatively uniform.Diffusion barrier is projected to via transflection film layer 120
The further even light of light, and can effectively cover between the transmission film layer 122 of transflection film layer 120 and the second reflective graphics 121
Boundary.
Further, as shown in figure 21, the backlight module 100 further include be set to the transflection film layer 120 with it is described
Quantum dot film layer 150 between Diffusion barrier layer 130.
Quantum dot film layer 150 (Quantum Dot, i.e. QD film layer) can be converted to the blue light that luminescence unit 112 issues
White light, while quantum dot particles are also equipped with haze, region that can be relatively low to 112 surface light emission luminance of luminescence unit carries out
Masking, advanced optimizes even light effect.The further even light of the Diffusion barrier layer 130 of QD film combination haze, and then be effectively blinded by
Dark space right above luminescence unit 112, the diffuser plate that do not need to arrange in pairs or groups again can also reach preferable even light effect.Composite prism 140
Effective optically focused further increases the overall brightness of backlight module 100.
2, Figure 22 is a kind of flow diagram of the production method of backlight module provided in an embodiment of the present invention referring to fig. 2,
Provided backlight module is for making backlight module shown in embodiment and related embodiment as shown in Figure 1 above.Such as
Shown in Figure 22, which comprises
Step 221 forms the first reflective coating and luminescence unit on the first substrate, wherein first reflective coating
Upper the first hollowed out area with multiple array arrangements, the luminescence unit and first hollowed out area correspond, setting
In in corresponding first hollowed out area；
Step 222 forms transmission film layer and the second reflective graphics on first reflective coating, wherein the transmission
There are prepsetting gap between film layer and second reflective graphics, described transmit in film layer has the second of multiple array arrangements to engrave
Empty region, second reflective graphics and second hollowed out area correspond, and are set in corresponding second hollowed out area；
The luminescence unit and second reflective graphics correspond, the orthographic projection position of the luminescence unit on the first substrate
In in the orthographic projection region of second reflective graphics on the first substrate.
The embodiments of the present invention provide backlight module production method, made backlight module include luminescent screen and
The first substrate of transflection film layer, luminescent screen is equipped with multiple luminescence units and the second reflective coating, and transflection film layer includes transmission film
Layer and multiple second reflective graphics, also, luminescence unit and the second reflective graphics correspond, and luminescence unit is on the first substrate
Orthographic projection be located in the orthographic projection region of second reflective graphics on the first substrate.In this way, luminescence unit issues
Light project on corresponding second reflective graphics, be reflected on the first reflective coating via the second reflective graphics, reduce hair
Light emission luminance right above light unit.The light being reflected on the first reflective coating is reflected into again in transmission film layer, by saturating
Film layer outgoing is penetrated, the light emission luminance of the exterior domain of luminescence unit is improved.As a result, can uniform backlight mould group entirety luminance
Degree, even light effect is preferable, reduces light efficiency loss, reduces mould group power consumption and thickness in the case where improving Integral luminous brightness
Degree.The specific implementation process of the production method of backlight module provided in an embodiment of the present invention may refer to above-described embodiment offer
Backlight module specific implementation process, this is no longer going to repeat them.
In addition, the embodiment of the invention also provides a kind of display device, including embodiment and correlation as shown in Figure 1 above
The backlight module that embodiment provides.
The display device that the embodiments of the present invention provide, included backlight module include luminescent screen and transflection film layer,
The first substrate of luminescent screen is equipped with multiple luminescence units and the second reflective coating, and transflection film layer includes transmission film layer and multiple the
Two reflective graphics, also, luminescence unit and the second reflective graphics correspond, the orthographic projection position of luminescence unit on the first substrate
In in the orthographic projection region of second reflective graphics on the first substrate.In this way, the light projection that luminescence unit issues
Onto corresponding second reflective graphics, be reflected on the first reflective coating via the second reflective graphics, reduce luminescence unit just on
The light emission luminance of side.The light being reflected on the first reflective coating is reflected into again in transmission film layer, is sucked out by transmission film layer
It penetrates, improves the light emission luminance of the exterior domain of luminescence unit.As a result, can uniform backlight mould group entirety light emission luminance, even light
Effect is preferable, reduces light efficiency loss, reduces mould group power consumption and thickness in the case where improving Integral luminous brightness.The present invention
The specific implementation process for the display device that embodiment provides, may refer to the specific implementation of backlight module provided by the above embodiment
Process, this is no longer going to repeat them.
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 subject to the protection scope in claims.
Claims (10)
1. a kind of backlight module characterized by comprising
Luminescent screen, it is described including first substrate, the multiple luminescence units and the first reflective coating of setting on the first substrate
With the first hollowed out area of multiple array arrangements, the luminescence unit and first hollowed out area one on first reflective coating
One is corresponding, is set in corresponding first hollowed out area；
The transflection film layer being set on the luminescent screen, including transmission film layer and multiple second reflective graphics, the transmission film layer
Upper the second hollowed out area with multiple array arrangements, second reflective graphics and second hollowed out area correspond,
It is set in corresponding second hollowed out area, there are prepsetting gaps between the transflection film layer and the luminescent screen；
The luminescence unit and second reflective graphics correspond, the positive throwing of the luminescence unit on the first substrate
Shadow is located in the orthographic projection region of second reflective graphics on the first substrate.
2. backlight module according to claim 1, which is characterized in that the transflection film layer further includes the second substrate, described
The second substrate is set on the luminescent screen, and the transmission film layer and multiple second reflective graphics are all set in described second
On substrate, the second substrate is used to form the prepsetting gap between the transflection film layer and the luminescent screen.
3. backlight module according to claim 1, which is characterized in that first reflective coating and/or described second is instead
Figure is penetrated including at least reflective metal layer.
4. backlight module according to claim 3, which is characterized in that first reflective coating includes being sequentially formed in institute
State the first insulating medium layer, the first reflective metal layer and the second insulating medium layer on first substrate；
First insulating medium layer surrounds the lower surface of first reflective metal layer, and second insulating medium layer surrounds institute
State the upper surface and side surface of the first reflective metal layer.
5. backlight module according to claim 4, which is characterized in that second reflective graphics include the second reflecting metal
Layer and third insulating medium layer.
6. backlight module according to claim 5, which is characterized in that first reflective metal layer and/or described second
Reflective metal layer is made of aluminium or silver；And/or
First insulating medium layer and/or the third insulating medium layer are made of aluminium oxide；And/or
Second insulating medium layer is made of titanium oxide and silica.
7. backlight module according to claim 1, which is characterized in that the backlight module further include be sequentially formed in it is described
Diffusion barrier layer and composite prism in transflection film layer.
8. backlight module according to claim 7, which is characterized in that the backlight module further includes being set to the transflection
Quantum dot film layer between film layer and the Diffusion barrier layer.
9. a kind of display device, which is characterized in that including backlight module such as described in any item of the claim 1 to 8.
10. a kind of production method of backlight module, which is characterized in that for making as described in any item of the claim 1 to 8
Backlight module, which comprises
The first reflective coating and luminescence unit are formed on the first substrate, wherein there are multiple battle arrays on first reflective coating
It arranges luminescence unit and first hollowed out area described in the first hollowed out area of arrangement to correspond, is set to corresponding described the
In one hollowed out area；
Transmission film layer and the second reflective graphics is formed on first reflective coating, wherein the transmission film layer and described the
There are prepsetting gap between two reflective graphics, second hollowed out area transmitted in film layer with multiple array arrangements is described
Second reflective graphics and second hollowed out area correspond, and are set in corresponding second hollowed out area；
The luminescence unit and second reflective graphics correspond, the positive throwing of the luminescence unit on the first substrate
Shadow is located in the orthographic projection region of second reflective graphics on the first substrate.
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| CN201811405657.0A CN109461376B (en) | 2018-11-23 | 2018-11-23 | Backlight module, manufacturing method thereof and display device |
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| CN109461376B CN109461376B (en) | 2022-12-02 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221477A (en) * | 2019-05-30 | 2019-09-10 | 华为技术有限公司 | Array substrate, liquid crystal display, terminal |
| CN111158191A (en) * | 2020-02-04 | 2020-05-15 | Tcl华星光电技术有限公司 | Backlight module and display device |
| CN111540273A (en) * | 2020-05-26 | 2020-08-14 | Tcl华星光电技术有限公司 | Mini LED backlight structure and Mini LED backlight module |
| CN112698528A (en) * | 2019-10-22 | 2021-04-23 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| CN114690484A (en) * | 2022-04-15 | 2022-07-01 | 广州立景创新科技有限公司 | Backlight module |
| WO2022140886A1 (en) * | 2020-12-28 | 2022-07-07 | 京东方科技集团股份有限公司 | Light-emitting substrate, preparation method therefor, light-emitting module, and display module |
| TWI802155B (en) * | 2021-12-17 | 2023-05-11 | 友達光電股份有限公司 | Light source module |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696996A (en) * | 2003-11-18 | 2005-11-16 | 友达光电股份有限公司 | Flat display |
| CN101000431A (en) * | 2006-01-09 | 2007-07-18 | 巨豪实业股份有限公司 | Backlight resource module of liquid crystal display with luminous element array |
| WO2009125104A2 (en) * | 2008-03-20 | 2009-10-15 | Guillaume Boulais | Lighting module, in particular a backlighting module |
| CN101630079A (en) * | 2008-07-18 | 2010-01-20 | 群康科技(深圳)有限公司 | Function integrating membrane and touch screen and backlight module adopting same |
| US20120147295A1 (en) * | 2010-09-14 | 2012-06-14 | Panasonic Corporation | Backlight unit, liquid crystal display apparatus using the same, and light-emitting diode used therefor |
| CN102644883A (en) * | 2011-03-25 | 2012-08-22 | 京东方科技集团股份有限公司 | Direct type backlight source |
| CN104375226A (en) * | 2014-11-09 | 2015-02-25 | 合肥乐凯科技产业有限公司 | Diffusion type brightened reflecting film and backlight device |
| CN107703678A (en) * | 2017-09-11 | 2018-02-16 | 青岛海信电器股份有限公司 | A kind of down straight aphototropism mode set and display device |
| CN107861291A (en) * | 2017-10-24 | 2018-03-30 | 华为技术有限公司 | Backlight module, display screen and terminal |
-
2018
- 2018-11-23 CN CN201811405657.0A patent/CN109461376B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696996A (en) * | 2003-11-18 | 2005-11-16 | 友达光电股份有限公司 | Flat display |
| CN101000431A (en) * | 2006-01-09 | 2007-07-18 | 巨豪实业股份有限公司 | Backlight resource module of liquid crystal display with luminous element array |
| WO2009125104A2 (en) * | 2008-03-20 | 2009-10-15 | Guillaume Boulais | Lighting module, in particular a backlighting module |
| CN101630079A (en) * | 2008-07-18 | 2010-01-20 | 群康科技(深圳)有限公司 | Function integrating membrane and touch screen and backlight module adopting same |
| US20120147295A1 (en) * | 2010-09-14 | 2012-06-14 | Panasonic Corporation | Backlight unit, liquid crystal display apparatus using the same, and light-emitting diode used therefor |
| CN102644883A (en) * | 2011-03-25 | 2012-08-22 | 京东方科技集团股份有限公司 | Direct type backlight source |
| CN104375226A (en) * | 2014-11-09 | 2015-02-25 | 合肥乐凯科技产业有限公司 | Diffusion type brightened reflecting film and backlight device |
| CN107703678A (en) * | 2017-09-11 | 2018-02-16 | 青岛海信电器股份有限公司 | A kind of down straight aphototropism mode set and display device |
| CN107861291A (en) * | 2017-10-24 | 2018-03-30 | 华为技术有限公司 | Backlight module, display screen and terminal |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221477B (en) * | 2019-05-30 | 2021-02-09 | 华为技术有限公司 | Array substrate, liquid crystal display screen and terminal |
| CN110221477A (en) * | 2019-05-30 | 2019-09-10 | 华为技术有限公司 | Array substrate, liquid crystal display, terminal |
| CN112698528A (en) * | 2019-10-22 | 2021-04-23 | 京东方科技集团股份有限公司 | Backlight module and display device |
| WO2021155624A1 (en) * | 2020-02-04 | 2021-08-12 | Tcl华星光电技术有限公司 | Backlight module and display device |
| CN111158191A (en) * | 2020-02-04 | 2020-05-15 | Tcl华星光电技术有限公司 | Backlight module and display device |
| US11307456B2 (en) | 2020-02-04 | 2022-04-19 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| CN111540273A (en) * | 2020-05-26 | 2020-08-14 | Tcl华星光电技术有限公司 | Mini LED backlight structure and Mini LED backlight module |
| CN111540273B (en) * | 2020-05-26 | 2021-08-06 | Tcl华星光电技术有限公司 | Mini LED backlight structure and Mini LED backlight module |
| US11703630B2 (en) | 2020-05-26 | 2023-07-18 | Tcl China Star Optoelectronics Technology Co., Ltd. | Mini-LED backlight panel and mini-LED backlight module |
| CN114326202A (en) * | 2020-09-29 | 2022-04-12 | 华为技术有限公司 | Light adjusting device, backlight module, liquid crystal display module and terminal |
| CN114428421A (en) * | 2020-10-29 | 2022-05-03 | 海信视像科技股份有限公司 | Display device |
| CN114428421B (en) * | 2020-10-29 | 2023-04-18 | 海信视像科技股份有限公司 | Display device |
| WO2022140886A1 (en) * | 2020-12-28 | 2022-07-07 | 京东方科技集团股份有限公司 | Light-emitting substrate, preparation method therefor, light-emitting module, and display module |
| TWI802155B (en) * | 2021-12-17 | 2023-05-11 | 友達光電股份有限公司 | Light source module |
| CN114690484A (en) * | 2022-04-15 | 2022-07-01 | 广州立景创新科技有限公司 | Backlight module |
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