CN105204101B - brightness enhancement film, backlight module and display - Google Patents
brightness enhancement film, backlight module and display Download PDFInfo
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- CN105204101B CN105204101B CN201510707937.7A CN201510707937A CN105204101B CN 105204101 B CN105204101 B CN 105204101B CN 201510707937 A CN201510707937 A CN 201510707937A CN 105204101 B CN105204101 B CN 105204101B
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Abstract
This application provides a kind of brightness enhancement film, backlight module and display.The brightness enhancement film includes transparent substrate layer and the functional layer being arranged in transparent base layer surface, and functional layer includes multiple subfunction layers, and each subfunction layer is three-dimensionally imaged, and the refractive index of each subfunction layer increases along the direction away from transparent substrate layer.The brightness enhancement film avoids the heavy losses of luminous intensity, improves the intensity of final emergent light.
Description
Technical field
The application is related to technical optics film applications, in particular to a kind of brightness enhancement film, backlight module and display.
Background technology
Brightness enhancement film can improve the positive luminous efficiency of display, and this is primarily due to the remote saturating of the functional layer of brightness enhancement film
The interface of bright substrate layer is three-D pattern surface, and existing refractive index official post is more than design angle between functional layer and air
The reflectance coating that light is returned in backlight module by total reflection, then brightness enhancement film is incident to again through reflectance coating, this incident light is again
When once passing through brightness enhancement film, have part light and pass through brightness enhancement film, so constantly circulation, the incidence angle of more light, which is adjusted to, to be set
Angle Inner is counted, also just there are more light to pass through brightness enhancement film, and then improve the luminous efficiency of display.
Brightness enhancement film as shown in Figure 1, including transparent substrate layer 1 ' and the functional layer that is arranged on the surface of transparent substrate layer 1 '
3 ', there is interface 032 ', due to functional layer 3 ' and the difference of the refractive index of air between functional layer 3 ' and air so that incident
Incident light to the different angle of interface 032 ' has the emergent light of four types.
Plane is divided into four regions by normal 33 ' (dotted line) with interface 032 ', is first area 01 ', the secondth area respectively
Domain 02 ', the 3rd region 03 ' and the 4th region 04 '.During incident by the first area 01 ' interface of light, when its incidence angle be less than it is complete
During angle of reflection, the emergent ray in the 3rd region 03 ' can be obtained directly through interface, here it is the emergent light of the first kind
Line 010 ', the emergent ray of this type is effective emergent ray.
Light by first area 01 ' it is incident and its incidence angle be more than the incident ray of the angle of total reflection and launch total reflection, obtain
To the emergent ray 020 ' of Second Type, the emergent ray of the type in adjacent prisms structure again incident brightness enhancement film by carrying out light
Line reclaims circulative metabolism.
When light is less than the angle of total reflection by incident and its incidence angle in the 4th region 04 ', going out for second area 02 ' is obtained
The emergent ray 030 ' of light, i.e. the 3rd type is penetrated, the emergent ray of the type is by adjacent prisms structure again incident brightness enhancement film
Zhong Jin rows light reclaims circulative metabolism.Light is by four region 04 ' incident, and when its incidence angle is more than the angle of total reflection, light
Transmitting total reflection, obtains the emergent ray 040 ' of the 4th type, the emergent ray of the type, which is directly entered in prism structure, to be carried out
Light reclaims circulative metabolism.
Therefore, in addition to the emergent ray 010 ' of the above-mentioned first kind, the emergent ray of remaining three types can be via returning
Receipts mechanism does the amendment in direction.In the recovery makeover process of light, light can constantly pass through a variety of media, quilt
Different Absorption of Medium, or the effects such as scattering occur, therefore, light recovery circulative metabolism inevitably causes original incident
The loss significantly of light energy, the i.e. intensity of emergent light are much smaller than the intensity of initial incident light.
The content of the invention
The application aims to provide a kind of brightness enhancement film, backlight module and display, to alleviate brightness enhancement film of the prior art
The problem of light loss is serious.
To achieve these goals, according to the one side of the application, there is provided a kind of brightness enhancement film, above-mentioned brightness enhancement film include
Transparent substrate layer and the functional layer being arranged in above-mentioned transparent base layer surface, above-mentioned functional layer include multiple subfunction layers, respectively
Above-mentioned subfunction layer is three-dimensionally imaged, and the refractive index of each above-mentioned subfunction layer increases along the direction away from above-mentioned transparent substrate layer
Greatly.
Further, each above-mentioned subfunction layer has at least one above-mentioned three-D pattern, when above-mentioned three-D pattern is two
Or when multiple, each above-mentioned three-D pattern is identical or different.
Further, above-mentioned functional layer includes：First subfunction layer and the second subfunction layer, wherein, the first subfunction layer
It is arranged on the surface of above-mentioned transparent substrate layer；Second subfunction layer is arranged on the remote above-mentioned transparent of above-mentioned first subfunction layer
On the surface of substrate layer.
Further, the refractive index of above-mentioned first subfunction layer is n1, and above-mentioned n1Between 1.3~1.5.
Further, above-mentioned first subfunction layer is acrylate resin layer or epoxy resin layer.
Further, above-mentioned first subfunction layer includes multiple first three-D patterns, and each above-mentioned first three-D pattern is identical
Or it is different, above-mentioned first three-D pattern is H along the thickness on the vertical transparent substrate layer direction1, each above-mentioned H10.5~
Between 20 μm.
Further, the refractive index of above-mentioned second subfunction layer is n2, and above-mentioned n2Between 1.5~1.65.
Further, above-mentioned second subfunction layer is acrylate resin layer or epoxy resin layer.
Further, above-mentioned second subfunction layer includes multiple second three-D patterns successively, each above-mentioned second graphics
Case is H along the thickness on the vertical transparent substrate layer direction2, above-mentioned H2Between 10~25 μm.
Further, corresponding one or more above-mentioned first three-D patterns of each above-mentioned second three-D pattern.
Further, above-mentioned three-D pattern is prism structure, convex lens structures or column structure.
According to further aspect of the application, there is provided a kind of backlight module, the backlight module include brightness enhancement film, the blast
Film is above-mentioned brightness enhancement film.
According to the another aspect of the application, there is provided a kind of display, the display include backlight module, the backlight mould
Group is above-mentioned backlight module.
The functional layer of brightness enhancement film in the application includes multiple subfunction layers, and the refractive index of each subfunction layer is along far
Direction from transparent substrate layer increases, and makes light incident from the low subfunction layer of refractive index to the high subfunction layer of refractive index.When
Light is n by one layer of refractive index1Subfunction layer to refractive index be n2Subfunction layer incidence when, incidence angle θ1, the angle of emergence is
θ2, law of refraction n1sinθ1=n2sinθ2, because n1<n2, so θ1＞ θ2, because light is by the subfunction layer of low-refraction
Into high index of refraction subfunction layer when, will not be totally reflected, and output angle θ2<90°.Therefore, when light passes through refractive index
For n1Subfunction layer and refractive index be n2Subfunction layer between interface after, output angle θ2<90 °, and θ2<θ1, i.e., light send out
Raw convergence, incidence angle of the so final light at the maximum subfunction layer of refractive index and the interface of air diminish so that occur complete
The light of reflection is reduced, and then is avoided more light and entered recovery circulative metabolism, is avoided the loss of more luminous intensity, is carried
The high intensity of final emergent light.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.In the accompanying drawings：
Fig. 1 shows a kind of cross-sectional view of brightness enhancement film of the prior art；
Fig. 2 shows the cross-sectional view for the brightness enhancement film that a kind of exemplary embodiment of the application proposes；
Fig. 3 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides；
Fig. 4 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides；
Fig. 5 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides；
Fig. 6 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides；
Fig. 7 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides；
Fig. 8 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides；And
Fig. 9 shows the cross-sectional view for the brightness enhancement film that a kind of preferred embodiment of the application provides.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, the energy of the emergent light of brightness enhancement film of the prior art is compared to the energy with incident light
Amount has larger loss, and in order to solve technical problem as above, present applicant proposes a kind of brightness enhancement film, backlight module and display
Device.
In a kind of typical embodiment of the application, there is provided a kind of brightness enhancement film, as shown in Fig. 2 the brightness enhancement film includes
Transparent substrate layer 1 and the functional layer 3 being arranged on the above-mentioned surface of transparent substrate layer 1, functional layer 3 includes subfunction layer, each above-mentioned
Subfunction layer is three-dimensionally imaged, and the refractive index of each above-mentioned subfunction layer increases along the direction away from above-mentioned transparent substrate layer 1.
Functional layer 3 includes multiple subfunction layers, and side of the refractive index of each subfunction layer along remote transparent substrate layer 1
To increase, light is incident from the low subfunction layer of refractive index to the high subfunction layer of refractive index.When light is by one layer of refractive index
n1Subfunction layer to refractive index be n2Subfunction layer incidence when, incidence angle θ1, angle of emergence θ2, law of refraction n1sin
θ1=n2sinθ2, because n1<n2, so θ1＞ θ2, therefore, when light enters high index of refraction by the subfunction layer of low-refraction
During subfunction layer, it will not be totally reflected, and refraction angle θ2<90°.Therefore, when light by refractive index is n1Subfunction layer with
Refractive index is n2Subfunction layer between interface after, output angle θ2<90 °, θ2<θ1, i.e. light restrains, such final light
Incidence of the line at the maximum subfunction layer of refractive index and the interface of air diminishes so that and the light being totally reflected is reduced, and then
Avoid more light and enter recovery circulative metabolism, avoid the loss of a large amount of luminous intensities, improve the strong of final emergent light
Degree.
Transparent substrate layer 1 can be pet layer, PE layers, layer of PVC either other transparent materials or transparent material it is compound
Layer, those skilled in the art can select suitable transparent substrate layer 1 according to actual conditions, however it is not limited to above-mentioned transparent base
Layer 1.
In order to avoid more incident ray enters recovery circulative metabolism, and then the intensity of emergent light is improved, such as Fig. 2 to figure
Shown in 8, preferably each above-mentioned subfunction layer has at least one above-mentioned three-D pattern, when above-mentioned three-D pattern is two or more
When, each above-mentioned three-D pattern is identical or different.
In a kind of embodiment of the application, as shown in Fig. 2 to 8, above-mentioned functional layer 3 includes：First subfunction layer 31 and
Two subfunction layers 32, wherein, the first subfunction layer 31 is arranged on the surface of above-mentioned transparent substrate layer 1；Second subfunction layer 32
It is arranged on the surface of remote above-mentioned transparent substrate layer 1 of above-mentioned first subfunction layer 31.So by only setting two layers of son
Functional layer, it is possible to avoid more light from entering recovery circulative metabolism, avoid the loss of luminous intensity, improve the strong of emergent light
Degree.
In order to better control over beam projecting direction, further it is less than the beam projecting angle of more first subfunction layers 31
The angle of total reflection of second subfunction layer 32, and then improve the intensity of final emergent light.The application preferably above-mentioned first subfunction layer
31 refractive index is n1, and above-mentioned n1Between 1.3~1.5.
In a kind of embodiment of the application, above-mentioned first subfunction layer 31 is acrylate resin layer or epoxy resin layer, third
Olefin(e) acid resin bed or epoxy resin layer are photo curable, and corresponding three-D pattern can be accurately obtained after photocuring.
Those skilled in the art can select suitable first subfunction layer 31 according to actual conditions.
In another embodiment of the application, as shown in Fig. 2 to Fig. 9, above-mentioned first subfunction layer 31 includes multiple first
Three-D pattern 310, each above-mentioned first three-D pattern 310 are identical or different.
Second three-D pattern 320 can be completely included, partly included, not comprising the first three-D pattern 310, Fig. 2, Fig. 5, figure
7 show a case that the second three-D pattern 320 completely includes the first three-D pattern 310 with Fig. 8, and Fig. 4 shows the second graphics
The part of case 320 includes the case part of the first three-D pattern 310, and it is three-dimensional that Fig. 6 shows that the second three-D pattern 320 does not include first
The case part of pattern 310.
In order to better control over the direction of emergent ray, and emergent light is caused to effectively act on the second subfunction layer 32
In, in a kind of embodiment, as shown in figure 9, above-mentioned first three-D pattern 310 along the thickness on the vertical transparent substrate layer direction
Spend for H1, above-mentioned H1Between 0.5~20 μm.
In the another embodiment of the application, the refractive index of above-mentioned second subfunction layer 32 is n2, and above-mentioned n21.5~
Between 1.65, by n2Control is in the range of this, on the one hand, due to final cirtical angle of total reflection θ sine value sin θ2=1/
n2, so such n2Being capable of the small cirtical angle of total reflection θ of Jin mono- Bu Minus；On the other hand, by controlling the cirtical angle of total reflection, improve
Display positive visual angle luminous intensity.
In a kind of embodiment of the application, the second subfunction layer 32 is acrylate resin layer or epoxy resin layer, acrylic acid
Resin bed or epoxy resin layer are photo curable, and corresponding three-D pattern can be accurately obtained after photocuring.Ability
Field technique personnel can select suitable second subfunction layer 32 according to actual conditions.
Those skilled in the art can select different acrylic resins, or the different types of epoxy resin of selection, obtain
The the first subfunction layer and the second subfunction layer of certain refractive index.
In another preferred embodiment of the application, above-mentioned second subfunction layer 32 includes multiple second three-dimensionals of connection
Pattern 320.
In order to improve the efficiency of brightness enhancement film, while display panel picture is controlled not interfere phenomenon, as shown in figure 8, on
State the second three-D pattern 320 is H along the thickness on the vertical transparent substrate layer direction2, above-mentioned H2Between 10~25 μm.
It is shown as shown in Figures 2 to 7 in a kind of embodiment of the application, each above-mentioned second three-D pattern 320 corresponding one
Individual or multiple above-mentioned first three-D patterns 310.It so can effectively control the outgoing light direction and of the first subfunction layer 31
The direction of the emergent light of two subfunction layers 32.
In order to simplify technique, cost is reduced, in a kind of embodiment of the application, above-mentioned three-D pattern is prism pattern, convex
Lens pattern or column structure.Those skilled in the art can select suitable three-D pattern according to actual conditions, not limit
With above two three-D pattern.
In a kind of embodiment of the application, above-mentioned second three-D pattern 320 is prism structure.
In another embodiment of the application, there is provided a kind of backlight module, the backlight module include brightness enhancement film, and on
It is above-mentioned brightness enhancement film to state brightness enhancement film.
For same incident light, the intensity ratio of the emergent light after the backlight module is through backlight mould of the prior art
The intensity of emergent light after group is big, therefore can improve luminous efficiency.
In the another embodiment of the application, there is provided a kind of display, the display include backlight module, the backlight mould
Group is above-mentioned backlight module.
The display includes above-mentioned backlight module, and then can improve the positive hair of the display using the backlight module
Light efficiency.
In order that the technical scheme of the application can clearly be understood by obtaining those skilled in the art, below with reference to tool
The embodiment of body illustrates the technical scheme of the application.
Embodiment 1
Brightness enhancement film as shown in Figure 2, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For PE layers, functional layer 3 includes three straton functional layers.Wherein, it is respectively the first subfunction layer along the direction away from transparent substrate layer 1
31st, the second subfunction layer 32 and the 3rd subfunction layer 33.The refractive index of first subfunction layer 31 is 1.3, and the first subfunction layer 31 wraps
The composite construction of multiple convex lens structure and prism structure is included, the thickness of the composite construction is 10 μm.The folding of second subfunction layer 32
It is 1.5 to penetrate rate, and the second subfunction layer 32 includes multiple prism patterns, and the thickness of prism pattern is 16 μm.3rd subfunction layer 33
Refractive index is 1.63, and the 3rd subfunction layer 33 includes multiple prism patterns, and prism pattern thickness is 25 μm.First subfunction layer
31st, the second subfunction layer 32 and the 3rd subfunction layer 33 are acrylate resin layer.Specific parameter is shown in Table 1.
Embodiment 2
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.It is respectively the first subfunction layer 31 along the direction away from transparent substrate layer 1
With the second subfunction layer 32.
First subfunction layer 31 and the second subfunction layer 32 are acrylate resin layer, and the refractive index of the first subfunction layer 31 is
1.45, as shown in figure 4, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For 16 μm.Second sub- work(
The refractive index of ergosphere 32 is 1.63, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2For 25 μm.
Directional light is incident to the first subfunction layer 31, and the angle of emergence of emergent light is converged in 0~62.81 °, fixed according to refraction
Rule, can be calculated, and the cirtical angle of total reflection of the second subfunction layer 32 and Air Interface is 37.84 °, so, by the first sub- work(
Ergosphere 31 project wide part can air inlet, without being totally reflected, improve the light quantity of air inlet, Jin Erti
The high intensity of the light of air inlet.Specific parameter is shown in Table 1.
Embodiment 3
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.Wherein, it is respectively the first sub- work(along the direction away from transparent substrate layer 1
The subfunction layer 32 of ergosphere 31 and second.
First subfunction layer 31 and the second subfunction layer 32 are acrylate resin layer, and the refractive index of the first subfunction layer 31 is
1.5, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For 16 μm.Second subfunction layer 32 reflects
Rate is 1.63, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2For 25 μm.Specific parameter is shown in Table 1.
Embodiment 4
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.Wherein, it is respectively the first sub- work(along the direction away from transparent substrate layer 1
The subfunction layer 32 of ergosphere 31 and second.
First subfunction layer 31 and the second subfunction layer 32 are acrylate resin layer, and the refractive index of the first subfunction layer 31 is
1.55, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For 16 μm.Second subfunction layer 32 reflects
Rate is 1.63, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2For 25 μm.Specific parameter is shown in Table 1.
Embodiment 5
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.It is respectively the first subfunction layer 31 along the direction away from transparent substrate layer 1
With the second subfunction layer 32.
First subfunction layer 31 is epoxy resin layer, and the second subfunction layer 32 is acrylate resin layer, the first subfunction
31 refractive index of layer are 1.45, as shown in figure 4, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For
0.5μm.The refractive index of second subfunction layer 32 is 1.65, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness
H2For 10 μm.Specific parameter is shown in Table 1.
Embodiment 6
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.It is respectively the first subfunction layer 31 along the direction away from transparent substrate layer 1
With the second subfunction layer 32.
First subfunction layer 31 is epoxy resin layer, and the second subfunction layer 32 is acrylate resin layer, the first subfunction
31 refractive index of layer are 1.45, as shown in figure 4, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For
20μm.The refractive index of second subfunction layer 32 is 1.63, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2
For 18 μm.Specific parameter is shown in Table 1.
Embodiment 7
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.It is respectively the first subfunction layer 31 along the direction away from transparent substrate layer 1
With the second subfunction layer 32.
First subfunction layer 31 and the second subfunction layer 32 are acrylate resin layer, and the refractive index of the first subfunction layer 31 is
1.45, as shown in figure 4, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For 16 μm.Second sub- work(
The refractive index of ergosphere 32 is 1.48, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2For 25 μm.Specifically
Parameter is shown in Table 1.
Embodiment 8
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.It is respectively the first subfunction layer 31 along the direction away from transparent substrate layer 1
With the second subfunction layer 32.
First subfunction layer 31 and the second subfunction layer 32 are acrylate resin layer, and the refractive index of the first subfunction layer 31 is
1.45, as shown in figure 4, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For 0.3 μm.Second son
The refractive index of functional layer 32 is 1.63, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2For 25 μm.Specifically
Parameter be shown in Table 1.
Embodiment 9
Brightness enhancement film as shown in Figure 4, the brightness enhancement film include the functional layer 3 on the surface of transparent substrate layer 1, transparent substrate layer 1
For pet layer, functional layer 3 includes two layers of subfunction layer.It is respectively the first subfunction layer 31 along the direction away from transparent substrate layer 1
With the second subfunction layer 32.
First subfunction layer 31 is epoxy resin layer, and the second subfunction layer 32 is acrylate resin layer, the first subfunction
31 refractive index of layer are 1.45, as shown in figure 4, the first subfunction layer 31 includes multiple prism patterns, the thickness H of prism pattern1For
16μm.The refractive index of second subfunction layer 32 is 1.63, and the second subfunction layer 32 includes multiple prism patterns, prism pattern thickness H2
For 5 μm.Specific parameter is shown in Table 1.
Comparative example
The brightness enhancement film includes the functional layer in transparent base layer surface, and transparent substrate layer 1 is pet layer, and functional layer is propylene
Acid resin layer, refractive index 1.63, functional layer include multiple prism patterns, and prism pattern thickness is 25 μm.
Directional light is incident to functional layer 3, according to the law of refraction, can be calculated, the total reflection of functional layer and Air Interface
Critical angle is 37.84 °, and so incidence angle more than 37.84 ° enters circulation and stress mechanism, inevitably reduces outgoing
The intensity of light.
Table 1
The brightness enhancement film of above-mentioned each embodiment and comparative example is assembled into backlight module and (ensures other knots in backlight module
Structure all same), the positive visual angle optical gain of each backlight module is measured using BM-7, test result is as shown in table 2.
Table 2
As shown in Table 2, the optical gain of the backlight module of the brightness enhancement film composition of embodiment 1 to 4 is than the blast of comparative example
The optical gain of the backlight module of film composition is big, and the brightness enhancement film of embodiment 2,3 and 4 includes two layers of subfunction layer, but implements
The refractive index of the first subfunction layer in example 4 is 1.55, not in the range of 1.3~1.5, therefore, the brightness enhancement film group of embodiment 4
Into backlight module optical gain also compared with the difference of embodiment 2 and embodiment 3, in embodiment 7 to 9, the second sub- work(of embodiment 7
The refractive index of ergosphere is not between 1.5~1.65, and the thickness of the first three-dimensional pattern layer of embodiment 8 is not in 0.5~20 μ m
Interior, the thickness of the second three-D pattern of embodiment 9 is not in the range of 10~25 μm, therefore, the brightness enhancement film of these three embodiments
The optical gain of the backlight module of composition is poor.
As can be seen from the above description, the application the above embodiments realize following technique effect：
1), functional layer includes multiple subfunction layers, and the refractive index of each subfunction layer is along away from transparent substrate layer
Direction increases, and light is incident from the low subfunction layer of refractive index to the high subfunction layer of refractive index.When light is by one layer of refractive index
For n1Subfunction layer to refractive index be n2Subfunction layer incidence when, incidence angle θ1, angle of emergence θ2, the law of refraction is
n1sinθ1=n2sinθ2, because n1<n2, so θ1＞ θ2, therefore, when light enters high reflect by the subfunction layer of low-refraction
During the subfunction layer of rate, it will not be totally reflected, and refraction angle θ2<90°.Therefore, when light by refractive index is n1Subfunction
Behind interface between layer and the subfunction layer that refractive index is n2, output angle θ2<90 °, θ2<θ1, i.e. light restrains, so most
Incidence of the whole light at the maximum subfunction layer of refractive index and the interface of air diminishes so that and the light being totally reflected is reduced,
And then avoid more light and enter recovery circulative metabolism, the loss of a large amount of luminous intensities is avoided, improves final emergent light
Intensity.
2), the backlight module in the application enables to the loss of light intensity smaller, and the intensity ratio of emergent light is through prior art
In backlight module after emergent light intensity it is big, it is possible to increase luminous efficiency.
3), the display in the application includes above-mentioned backlight module, and above-mentioned backlight module, which can improve, changes display
Positive luminous efficiency.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (11)
1. a kind of brightness enhancement film, the brightness enhancement film includes transparent substrate layer (1) and is arranged on the transparent substrate layer (1) surface
Functional layer (3), it is characterised in that the functional layer (3) includes multiple subfunction layers, and each subfunction layer has graphics
Case, and the refractive index of each subfunction layer increases along the direction away from the transparent substrate layer (1), wherein, the functional layer
(3) include：
First subfunction layer (31), is arranged on the surface of the transparent substrate layer (1)；And
Second subfunction layer (32), it is arranged on the surface of the remote transparent substrate layer (1) of the first subfunction layer (31)
On, the first subfunction layer (31) includes multiple first three-D patterns (310), and the second subfunction layer (32) is included successively
Multiple second three-D patterns (320), each corresponding multiple first three-D patterns of second three-D pattern (320)
(310)。
2. brightness enhancement film according to claim 1, it is characterised in that each subfunction layer has at least one three-dimensional
Pattern, when the three-D pattern is two or more, each three-D pattern is identical or different.
3. brightness enhancement film according to claim 1, it is characterised in that the refractive index of the first subfunction layer (31) is n1, and
The n1Between 1.3~1.5.
4. brightness enhancement film according to claim 3, it is characterised in that the first subfunction layer (31) is acrylate resin layer
Or epoxy resin layer.
5. brightness enhancement film according to claim 1, it is characterised in that each first three-D pattern (310) is identical or different,
First three-D pattern (310) is H along the thickness on the vertical transparent substrate layer direction1, the H1At 0.5~20 μm
Between.
6. brightness enhancement film according to claim 1, it is characterised in that the refractive index of the second subfunction layer (32) is n2, and
The n2Between 1.5~1.65.
7. brightness enhancement film according to claim 6, it is characterised in that the second subfunction layer (32) is acrylate resin layer
Or epoxy resin layer.
8. brightness enhancement film according to claim 5, it is characterised in that each second three-D pattern (320) along vertical institute
It is H to state the thickness on transparent substrate layer direction2, the H2Between 10~25 μm.
9. brightness enhancement film according to claim 1, it is characterised in that the three-D pattern is prism structure, convex lens structures
Or column structure.
10. a kind of backlight module, including brightness enhancement film, it is characterised in that the brightness enhancement film is any one of claim 1 to 9 institute
The brightness enhancement film stated.
11. a kind of display, including backlight module, it is characterised in that the backlight module is the back of the body described in claim 10
Optical mode group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510707937.7A CN105204101B (en) | 2015-10-27 | 2015-10-27 | brightness enhancement film, backlight module and display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510707937.7A CN105204101B (en) | 2015-10-27 | 2015-10-27 | brightness enhancement film, backlight module and display |
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| Publication Number | Publication Date |
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| CN105204101A CN105204101A (en) | 2015-12-30 |
| CN105204101B true CN105204101B (en) | 2018-03-02 |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7125131B2 (en) * | 2002-12-06 | 2006-10-24 | General Electric Company | Brightness enhancement film with improved view angle |
| CN203812215U (en) * | 2014-04-18 | 2014-09-03 | 北京丹贝投资有限公司 | Infrared touch screen |
| CN104820252A (en) * | 2015-05-14 | 2015-08-05 | 张家港康得新光电材料有限公司 | Brightness enhancement film, preparation method therefor, and optical composite film |
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