CN109975919A - Have both be higher by brilliant degree and it is high enter light exhibition angle light guide plate and backlight module manufacturing method - Google Patents
Have both be higher by brilliant degree and it is high enter light exhibition angle light guide plate and backlight module manufacturing method Download PDFInfo
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- CN109975919A CN109975919A CN201910419449.4A CN201910419449A CN109975919A CN 109975919 A CN109975919 A CN 109975919A CN 201910419449 A CN201910419449 A CN 201910419449A CN 109975919 A CN109975919 A CN 109975919A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
Abstract
The present invention provide it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle light guide plate and backlight module manufacturing method, in the light conducting plate body with a thickness of 1.5~2.5mm, through coining mode its light-emitting surface forms guide-lighting groove, incidence surface forms exhibition light micro-structure.Incidence surface is provided with receiving LED light source light and keeps 0.25~0.45mm with LED light source distance, and adjacent LED light source spacing is 19.5~19.9mm.Opening up light micro-structure is evagination column and continuous arrangement, and it is distributed and accounts for the 13~23% of incidence surface area upward from incidence surface lower edge, and the top in section has a curved arc section, two sides of the bottom point one oblique straight section of tool, protruding length is 27~33 μm, adjacent curved arc section spacing is 70~76 μm, and angle folded by adjacent oblique straight section is 46~66 degree.It is the transition region of 5.5~6.5mm that light-emitting surface, which has length, and guide-lighting trench depth is 38~42 μm, and adjacent guide-lighting trench spacing is 270~330 μm, goes out optical property when thus effectively promoting application.
Description
Technical field
The present invention relates to field of optical modules, especially it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle light guide plate and
Backlight module manufacturing method.
Background technique
Light guide plate is one of considerable product in current optical component field, with excellent guide-lighting efficiency, and
The ray guidance of point light source can be converted to whole face formula light, to be used as light source, all kinds of illuminators and display equipment,
The most of selections as applied.
In general, light guide plate design main consideration important document be radiance degree and the uniformity, in order to promoted it is aforementioned out
Light presents and performance, and the practice that presently relevant manufacturer is taken is that various micro-structures are arranged on light guide plate, is existed with adjusting light
Conduction and light state out in light guide plate.And the specific production of light guide plate, then it is made mostly of ejection formation.To lead
Micro-structure above-mentioned is formed on tabula rasa, need to portray corresponding micro-structure through the mode such as Tool in Cutting on mold, and makes to lead
Tabula rasa is formed on those structures when projecting.However, light guide plate made by such mode and micro-structure matter thereon
It measures bad, and is also easy to produce planform and expected difference, and ejection formation can not also be suitable for that large-sized leaded light is made
Plate.On the other hand, also take on light guide plate in such a way that micro-structure is made in Tool in Cutting, but this kind of mode pole after production
It is also easy to produce defective material dust, those remaining dust have sizable adverse effect for ray guidance, and Tool in Cutting is also uncomfortable
For large-size light-conducting plate to be made, efficiency and yield all have very big shortcoming.
Again after light guide plate is equipped with a variety of micro-structures, the relatively easy light for making sensitivity is directed to be formed expected
It is outer go out light state, and the phenomenon that generate many influence outgoing light homogeneities and luminance.Go out so how effectively to promote light guide plate
Optical property actually needs to overcome so that carrying the module applied has more preferably light emitting efficiency with device in presently relevant industry
With solve the problems, such as.
Summary of the invention
In view of this, a purpose of the invention, it is desirable to provide it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle leaded light
Plate and backlight module manufacturing method can eliminate light interference phenomenon brought by structure on light guide plate, light guide plate are substantially improved
Go out optical property when application, and in large-sized application demand, has excellent speed of production and product yield.
In order to achieve the above object, the present invention proposed in an embodiment it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle
Light guide plate, for receiving the light of a plurality of LED light sources, include: a light conducting plate body has one with a thickness of 1.5~2.5mm
Incidence surface and a light-emitting surface, the light-emitting surface and the incidence surface perpendicular abutment are exported for light, the incidence surface and those LED light sources
Distance remains 0.25~0.45mm, and appointing the spacing of those two adjacent LED light sources is 19.5~19.9mm；A plurality of Zhan Guangwei
Structure, forms in the incidence surface through rolling mode and for continuous arrangement, and respectively the exhibition light micro-structure is in evagination column, and its section
Has a curved arc section for top, two sides of the bottom have the shape of an oblique straight section respectively；Wherein, respectively the exhibition light micro-structure from the incidence surface
Lower edge is distributed upward, accounts for the 13~23% of the incidence surface area, and respectively the protrusion length of the exhibition light micro-structure is between 27~33 μ
M appoints the spacing of those two adjacent curved arc sections between 70~76 μm, appoints angle folded by those two adjacent oblique straight sections between 46
~66 degree；One transition region is located at the light-emitting surface, and extends from the top edges of the incidence surface towards the direction far from the incidence surface,
Development length is 5.5~6.5mm；And a plurality of guide-lighting grooves are distributed in the light-emitting surface and are V through forming mode is extruded
Type structure, respectively the depth of the leaded light groove is between 38~42 μm, and appoint the spacing of those two adjacent guide-lighting grooves between 270~
330μm.The interference phenomenon generated when light is guided by light guide plate can be effectively eliminated as a result, be substantially improved light guide plate in
Using when the optical property that is presented.
The present invention also proposed in an embodiment it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle backlight module
Manufacturing method comprising the steps of: a light guide plate is provided, which has an incidence surface, a light-emitting surface and a transition region, and
The thickness of the light guide plate is between 1.5~2.5mm, and wherein the incidence surface and the light-emitting surface are perpendicular abutment setting, the transition position
In the light-emitting surface, and from the top edges of the incidence surface towards far from the incidence surface direction extend, development length be 5.5~
6.5mm；A plurality of guide-lighting grooves are imprinted in the light-emitting surface, wherein those guide-lighting grooves are respectively V-structure, respectively the leaded light groove
Depth between 38~42 μm, and appoint the spacing of those two adjacent guide-lighting grooves between 270~330 μm；Imprint a plurality of exhibitions
Light micro-structure is in the incidence surface, and wherein those exhibition light micro-structures are distributed upward from the lower edge of the incidence surface and arrange to be continuous
Column, respectively the exhibition light micro-structure is evagination column, and respectively the section of the exhibition light micro-structure is that top has a curved arc section, two sides of the bottom point
Not Ju an oblique straight section shape；Wherein, respectively the exhibition light micro-structure accounts for the 13~23% of the incidence surface area, respectively the exhibition light micro-structure
Protrusion length between 27~33 μm, appoint those two adjacent curved arc sections spacing between 70~76 μm, appoint it is two adjacent those
Angle folded by oblique straight section is between 46~66 degree；And a plurality of LED lights of setting are derived from the incidence surface, and those LED light sources with should
The distance of incidence surface remains 0.25~0.45mm, appoints the spacing of those two adjacent LED light sources between 19.5~19.9mm.Thoroughly
Backlight module made of abovementioned steps is crossed, has splendid outgoing light homogeneity and luminance, effectively promotes whole optical property out.
Based on aforementioned two embodiment, further disclosed in a further embodiment the light conducting plate body with a thickness of
2.2mm, to have more preferably effectiveness.
In Yu Ciyi embodiment, respectively the protrusion length of the exhibition light micro-structure is 30 μm, appoints those two adjacent curved arc sections
Spacing be 73 μm, appoint angle folded by those two adjacent oblique straight sections between 54~57 degree, light guide plate thus can be allowed with more
Good exhibition light effect.
The depth that the leaded light groove is disclosed in an embodiment is 40 μm, appoints the spacing of those two adjacent guide-lighting grooves
It is 300 μm, thus more preferably goes out radiance degree adjustment efficiency to have.
Can to make light that there is more preferably incident state, incident ray is directed to successfully with sharp light guide plate and is adjusted, in
It is 0.35mm that those LED light sources are then disclosed in one embodiment at a distance from the incidence surface, appoints those two adjacent LED light sources
Spacing is 19.7mm.
In conclusion disclosed having both is higher by brilliant degree and height enters the light guide plate and backlight module system at light exhibition angle
Method is made, discloses and limits constituted structure using specific scale, light guide plate has been had both and is higher by brilliant degree and height enters light exhibition
Angle, while eliminating when two kinds of structures and while being stored in light guide plate generated optical interference phenomena, significantly improve light guide plate goes out light
Performance, to provide the optical articles of higher order, high quality.And it is not easy in view of the production now for large-size light-conducting plate, this hair
Bright revealed light guide plate adopts extrusion type exhibition light micro-structure and guide-lighting groove is made, and can solve passing to utilize ejection formation
Or Tool in Cutting can not be suitable for the problem of large-size light-conducting plate is made.
Detailed description of the invention
Fig. 1 is the light guide plate stereoscopic schematic diagram of better embodiment of the present invention.
Fig. 2 is the assembling schematic diagram of the light guide plate collocation LED light source of better embodiment of the present invention.
Fig. 3 is the light guide plate schematic partial cross-sectional view of better embodiment of the present invention.
Fig. 4 is the backlight module manufacturing method block diagram of better embodiment of the present invention.
Fig. 5 is that better embodiment of the present invention imprints the schematic diagram to form guide-lighting groove.
Fig. 6 is that better embodiment of the present invention imprints the schematic diagram to form exhibition light micro-structure.
Fig. 7 A is the schematic diagram that light guide plate has light interference phenomenon.
Fig. 7 B is another schematic diagram that light guide plate has light interference phenomenon.
Fig. 8 A is the luminous intensity schematic diagram opened up when light micro-structure is set to incidence surface different zones position.
Fig. 8 B is the exhibition light state schematic diagram opened up when light micro-structure is set to incidence surface different zones position.
Fig. 9 is the light state schematic diagram out for opening up light micro-structure when having different height.
Figure 10 is that LED light source and incidence surface go out light state schematic diagram in different distance.
Figure 11 is to go out light state schematic diagram when transition region has different development lengths.
Description of symbols
1 light guide plate
10 light conducting plate bodies
101 incidence surfaces
102 light-emitting surfaces
11 exhibition light micro-structures
111 curved arc sections
112 oblique straight sections
12 transition regions
13 guide-lighting grooves
2 LED light sources
3 backlight modules
A incidence surface is at a distance from LED light source
P1Appoint the spacing of two adjacent LED light sources
L1Open up the protrusion length of light micro-structure
P2Appoint the spacing of two adjacent curved arc sections
θ appoints angle folded by two adjacent oblique straight sections
L2The development length of transition region
The depth of D leaded light groove
P3The spacing of guide-lighting groove
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
The exploitation designing technique of light guide plate develops so far, and relevant manufactures have had quite skilled designed capacity substantially, and
The environment components difference in the field and collocation that are used based on light guide plate, light guide plate go out light demand or to be slightly different, such as
Applied to the light guide plate in field of display devices, the requirement for outgoing light homogeneity is relatively stringent, and is applied to lighting area
Light guide plate, then may have for going out the distribution of luminous intensity required.For showing the light guide plate in equipment, to make to take
The display panel of load, which has, more preferably shows presentation, and the outgoing light homogeneity of light guide plate itself is then that most important design is examined with luminance
Consider and improves target.
Currently, the reason of common influence light guide plate outgoing light homogeneity is the presentation of brightness unevenness caused by point light source, namely
So-called hot spot phenomenon is started because the light for being projected to light guide plate in point light source excessively concentrates collimation, and makes adjacent point light
Meeting sandwiched forms opposite dark space between source, and the neighbouring side for receiving light of light guide plate is allowed to form foregoing hot spot phenomenon.This is bright dark
Uneven hot spot phenomenon can allow light guide plate significant bright spot occur when application, so that the inadequate uniformity of provided area source
And influence the display efficiency of display equipment.In order to solve the hot spot phenomenon of brightness unevenness, more intuitive and quick settling mode,
Be as much as possible eliminate point light source between sandwiched formed dark space, while allow light guide plate correspond to point light source primary optical axis region and its
His brightness in region is more aligned.Feasible scheme is to increase the setting number of point light source, to utilize more point light source institutes
The light of offer supplies dark space；Or in micro-structure is arranged on light guide plate, angle is opened up to adjust the light that enters of point light source, expands consecutive points
Light source incidence light is folded area and eliminates the generation of bright dark space block；Or increase point light source at a distance from incidence surface, so as to lead
Tabula rasa institute it is received enter light exhibition angle increase.However increase the mode of point light source number, except allowing manufacturing cost to increase, also it is easy because going out
Light is excessively folded and generates the excessively bright phenomenon in part, and extends the scheme of point light source Yu incidence surface distance, then is that will cause volume
Increase and light extraction efficiency decline.Therefore, other than in response to specific purposes, micro-structure is arranged in light guide plate in most of can still take
Mode solve hot spot phenomenon.In general, preferable embodiment is that micro-structure, Jin Erkuo is arranged in light guide plate incidence surface
Big point-source light ray enters exhibition angular when light guide plate.
Radiance degree instructs the positive emitting brightness of tabula rasa, after entering light guide plate due to light, led by continuous light out
Drawing traveling influences, and finally can almost be lost and finish in the light ray energy that light-emitting surface forms out light, and radiance degree is once insufficient out,
Display efficiency when light guide plate is applied to display equipment will substantially be influenced.Go out to guide light by light guide plate from front
Light time can have higher light ray energy, namely use brilliant degree and effectively improved, and take sets more in light guide plate surface at present
The mode for setting groove makes the light in portions incident to light guide plate be refracted and achieve the purpose that enhance radiance degree out.
Above-mentioned micro-structure and trench design, in past light guide plate design concept, compared with no-trump, it is set to simultaneously is led
Application on tabula rasa, current relevant manufactures can only select one when production mostly and apply, thus can only solve single optics and present
Missing, the only requirement variation with market for Related product, under the high standard demand of high-order Light guiding plate and backlight module, this
Invention team starts to be conceived towards this aspect and exploitation.However, team's discovery of the present invention, which is worked as, to be made light guide plate while having into light
When the groove on the micro-structure in face and surface, incident ray is influenced by micro-structure and improves exhibition angular, is that can solve originally
The certainly hot spot phenomenon of brightness unevenness, but after light continues and touches groove with advance, but because the refraction of groove makes to open up instead
Angular is excessive, causes point light source front excessively dark, bright packet is but generated between point light source, and then produce serious light interference and ask
Topic, as shown in figs. 7 a and 7b, as seen from the figure light guide plate go out light distribution, hence it is evident that with incandescent clear zone or bright spot present.
Such as foregoing teachings, when micro-structure and groove are existed simultaneously in can generate serious interference phenomenon on light guide plate, in order to
Eliminate those factors, team of the present invention is directed to then various will affect ray guidance and the important document of light state out design and reality one by one
It tests.It will affect those important documents of ray guidance with light state out, specifically substantially the scale comprising light guide plate itself, collocation are answered
State, the size of micro-structure and setting position, the size of groove and setting position etc. is arranged in point light source, via constantly taking
After experiment, a preferable overall structure and ambient conditions, particular technique content as proposed by the invention are obtained.
FIG. 1 to FIG. 3 is please referred to, is the part of the light guide plate stereoscopic schematic diagram of better embodiment of the present invention, light guide plate
The assembling schematic diagram of schematic cross-section and light guide plate collocation LED light source.And also referring to Fig. 8 A~Figure 11, for the present invention into
Capable each optical authentication result schematic diagram and corresponding schematic diagram.It is wanted based on slimming needed for market today with large scale
Ask, the present invention having both disclosed by this be higher by brilliant degree and it is high enter light exhibition angle light guide plate 1 for receiving a plurality of LED light sources
2 light includes a light conducting plate body 10, a plurality of exhibition light micro-structures 11, a transition region 12 and a plurality of guide-lighting grooves 13.It should
The thickness T of light conducting plate body 10 between 1.5~2.5mm, and have an incidence surface 101 and a light-emitting surface 102, light-emitting surface 102 with
101 perpendicular abutment of incidence surface is exported for light, and incidence surface 101 and 2 distance A of LED light source remains 0.25~0.45mm, and wantonly two
The spacing P of those adjacent LED light sources 21For 19.5~19.9mm.Exhibition light micro-structure 11 forms in incidence surface through rolling mode
101 and be continuous arrangement, each light micro-structure 11 of opening up is in evagination column, and its section is that top has a curved arc section 111, two sides of the bottom
Has the shape of an oblique straight section 112 respectively.Wherein respectively exhibition light micro-structure 11 be distributed upward from 101 lower edge of incidence surface, and account for into
The 13~23% of 101 area of smooth surface, each protrusion length L for opening up light micro-structure 111Between 27~33 μm, appoint two adjacent curved arc sections
111 spacing P2Between 70~76 μm, appoint angle, θ folded by two adjacent oblique straight sections 112 between 46~66 degree.Wherein, Zhan Guang
Micro-structure 11 extends along 101 long side of incidence surface to be distributed, and the extent length for laying it is equal with 101 long side length of incidence surface,
But 101 short side direction of incidence surface then it is non-for completely throughout state, as shown in Figure 1.Transition region 12 is located on light-emitting surface 102,
And to extend from the top edges of incidence surface 101 towards the direction far from incidence surface 101, development length L2For 5.5~6.5mm.
Transition region 12 is defined as the non-visible area domain on light-emitting surface 102 in this, and when the collocation other assemblies of light guide plate 1, group sets and to form display
After equipment, which can be covered by frame, and be not belonging to the viewing areas of user.Those guide-lighting grooves 13 then through extrude at
Shape mode is distributed in light-emitting surface 102 and is V-structure, and the depth D of each leaded light groove 13 appoints two adjacent between 38~42 μm
The spacing P of guide-lighting groove 133Between 270~330 μm.It can effectively eliminate on light guide plate 1 as a result, while there is groove and micro- knot
Caused optical interference phenomena when structure promotes optical property when application.Wherein, each figure drawn size of components and ratio
To understand technical characteristic of the invention, non-expression actual size ratio with benefit for clearly illustrating structure of the invention and opposite pass
Example, based on the scale of each component of the present invention is recorded with specification.
In view of the product demand of large scale and slimming, thus light conducting plate body 10 of the invention limit its thickness T between
1.5~2.5mm, a preferable implementation state are then that the thickness T of light conducting plate body 10 is 2.2mm.Under thickness condition above-mentioned,
Then it is designed and is simulated for exhibition light micro-structure 11 and guide-lighting groove 13.It wherein, is enhancement speed of production and yield, and
It is more suitable for producing large-size light-conducting plate, exhibition light micro-structure 11 and guide-lighting groove 13 in light conducting plate body 10 of the present invention all penetrate
The coining mode of rolling is formed thereby, selects rolling mode that can be conducive to quickly and accurately in forming special make in light conducting plate body 10
The exhibition light micro-structure 11 of type and scale and guide-lighting groove 13 effectively solve passing caused by ejection formation or Tool in Cutting accordingly
Yield it is lowly difficult with production the problems such as, remaining detailed manufacturing step is further explained in subsequent manufacturing method
And light micro-structure 11 is opened up about those, it is the shape with curved arc section 111 and two oblique straight sections 112 using its section,
It allows the light of LED light source 2 to enter the light exhibition angle expanded of light guide plate 1, and is limited through scale above-mentioned and allow light guide plate 1
It can avoid the generation of light interference phenomenon again simultaneously being lifted into light exhibition angle.And a preferable implementation state is to make each exhibition light micro-structure
11 protrusion length L1It is 30 μm, appoints the spacing P of two adjacent curved arc sections 1112It is 73 μm, and appoints two adjacent oblique 112 institutes of straight section
The angle, θ of folder is between 54~57 degree, thus to have superior light modulation and avoid light interference and other effects.Special one mentions
It is that those exhibition light micro-structures 11 of the invention are distributed setting from 101 lower edge of incidence surface upward, and account for 101 area of incidence surface
13~23%, rather than be dispersed throughout all areas of incidence surface 101, reason is to be dispersed throughout incidence surface when exhibition light micro-structure 11
When 101, after light is guided via exhibition light micro-structure 11 and guide-lighting groove 13, excessive exhibition angle can be generated, bright contract for fixed output quotas is instead resulted in
It is raw, therefore Tentative Ideas is to exclude to make to open up the design that light micro-structure 11 is dispersed throughout incidence surface 101.Then, it is necessary to which consideration will allow
Exhibition light micro-structure 11 is distributed on incidence surface with which kind of state, to this team of the present invention to have the light guide plate of aforementioned parameters
1 as verifying basis, and optical appearance when forming in incidence surface different zones for exhibition light micro-structure 11 is tested, tested
As a result as shown in Fig. 8 A and Fig. 8 B, wherein (a) in Fig. 8 A indicates that exhibition light micro-structure 11 is located at the light of 101 upper area of incidence surface
Line intensity distribution, (b) in Fig. 8 A indicate that exhibition light micro-structure 11 is located at the light intensity of 101 middle section of incidence surface and is distributed
Scheme, (c) in Fig. 8 A indicates that exhibition light micro-structure 11 is located at the light intensity distribution map of 101 lower zone of incidence surface；In Fig. 8 B
(a) exhibition light state signal when exhibition light micro-structure 11 is located at 101 upper area of incidence surface is indicated, (b) in Fig. 8 B indicates exhibition light
Micro-structure 11 is located at exhibition light state signal when 101 middle section of incidence surface, and (c) in Fig. 8 B indicates that exhibition light micro-structure 11 is located at
Exhibition light state signal when 101 lower zone of incidence surface.According to as a result, it has been found that when exhibition light micro-structure 11 is located at 101 center of incidence surface
When region, though having optimal exhibition light effect, some light can be generated directly from the visible area at neighbouring 12 rear of transition region
It projects, and visible area is caused to generate local bright spot, so that optical property is relatively low insufficient, and rolling and processing need to be with light guide plate
Anchor point of 1 side as coining, therefore the exhibition light micro-structure 11 in setting is upper extremely difficult in manufacture.Accordingly, it is left to allow exhibition
Light micro-structure 11 is distributed in the selection of 101 upper area of 101 lower zone of incidence surface or incidence surface, and as seen from the figure, Zhan Guang
Micro-structure 11 has preferable optical property when being distributed in 101 lower section of incidence surface, and local light will not be allowed to penetrate from non-transition region 12
Out, it is typically provided framework shielding above transition region 12 and carrys out concealing, but shielding is wished to become smaller to realize narrow frame；And it is distributed in into light
The top of face 101 is then also easy to produce the bright packet at big visual angle, this be disclosed herein exhibition light micro-structure 11 present from incidence surface 101
Lower edge is distributed the reason of setting upward.It is in next step the distributed areas size for determining exhibition light micro-structure 11, to this present invention
The light state that goes out that team accounts under the various percentages of 101 area of incidence surface also for exhibition light micro-structure 11 is detected.Wherein in this
With the light conducting plate body 10 with a thickness of 2.2mm, and using 101 lower edge of incidence surface as baseline, make the height for opening up light micro-structure 11
It is verified when respectively 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9 and 1mm, goes out light state result i.e. as schemed
Shown in 9.As seen from the figure, when exhibition light micro-structure 11 accounts for the percentage of 101 area of incidence surface less than 13%, namely exhibition light micro-structure 11
Height when being less than 0.3mm, then clear zone can be generated in front of LED light source 2, when being greater than 23%, namely exhibition light micro-structure 11
When height is greater than 0.5mm, then clear zone can be generated between adjacent LED light source 2, two kinds of situations all will affect going out for light guide plate 1
Optical property.Therefore when exhibition light micro-structure 11 accounts for the 13%~23% of 101 area of incidence surface, then it is in optimal optical property out
Existing, this is that the present invention limits the reason of exhibition light micro-structure 11 accounts for 101 area 13%~23% of incidence surface.
About the part of guide-lighting groove 13, penetrate V-structure characteristic, effective refracted portion via incidence surface 101 and its
On exhibition light micro-structure 11 be incident to the light of light guide plate 1, so that the entirety of light-emitting surface 102 is gone out radiance degree and promoted, and penetrate
Scale above-mentioned limits and light guide plate 1 is allowed to be lifted out brilliant degree while can avoid the generation of light interference phenomenon.Further,
To have more preferably pH effect efficiency and the presentation of light out, a preferable implementation state is the depth D for making each guide-lighting groove 13
40 μm, appoint the spacing P of two adjacent guide-lighting grooves 133It is 300 μm.
Further, by light guide plate 1 arrange in pairs or groups application LED light source 2 be arranged condition, also can be subsequent to light guide plate 1
Whole light out has extreme influence, therefore other than the preferred construction restrictive condition in addition to obtaining light guide plate 1, for setting for LED light source 2
Important document is set, team of the present invention has also carried out corresponding verifying.It is limited first for LED light source 2 and 101 distance A of incidence surface, LED
It is Air Gap that light source 2 and 101 distance A of incidence surface is commonly referred to as in related fields.As described in front of for hot spot phenomenon
Content will cause incident ray intensity deficiency and then lead to light extraction efficiency not when LED light source 2 and 101 hypertelorism of incidence surface
It is good, therefore LED light source 2 must not be allowed too far, relatively must not also to allow LED light source 2 apart from 101 mistake of incidence surface apart from incidence surface 101
Closely, in order to avoid causing phenomena such as generating bright spot and bright packet in front of LED light source 2, to this present invention for LED light source 2 and incidence surface 101
The light performance that goes out under different distance is verified, as shown in Figure 10 and following table one.As seen from the figure, when LED light source 2 and incidence surface
When 101 distance A is less than 0.25mm, has obvious bright line and exist, then when LED light source 2 and 101 distance A of incidence surface are less than
When 0.35mm, then start subtle bright line only occur and fall within the scope of acceptable optical property, and LED light source 2 with enter
When the distance A of smooth surface 101 is more than or equal to 0.35mm, visual effect starts more smoothly, although wherein LED light source 2 and incidence surface
When 101 distance A comes 0.5mm, visual effect also belongs to smooth state, but according to one content of table, it has been found that generation averages out
The too low problem of smooth surface luminance, therefore disclosed light guide plate 1, LED light source 2 of arranging in pairs or groups is in application, must make incidence surface
101 at a distance from LED light source 2 keep 0.25~0.45mm in the range of.And further consider 102 average luminance of light-emitting surface,
Therefore it is 0.35mm that a preferable implementation state, which is LED light source 2 and 101 distance A of incidence surface, can so take into account out radiance degree
It is presented with optical property.
Table one
Other than the presentation of light out that LED light source 2 is will affect at a distance from incidence surface 101 when light guide plate 1 is applied, LED light source 2
12 length of transition region in mutual spacing and light guide plate 1 is also influenced, wherein the spacing P about LED light source 21, this hair
To have the light guide plate 1 of aforementioned parameters as after verifying basis, the spacing P of LED light source 2 is worked as in discovery for bright team119.5
When~19.9mm, can have and preferably go out optical property, as the spacing P of LED light source 21It is non-when falling within aforementioned range, hot spot phenomenon phase
It is more serious to meeting, and a preferable implementation state is then the spacing P for appointing two adjacent LED light sources 21For 19.7mm.Then this hair
Bright team is with the spacing P of two adjacent LED light sources 21It is verified for 19.7mm, as shown in figure 11, it is seen that when transition region 12
Development length L2It is not in hot spot phenomenon when between 5.5~6.5mm, but with 12 development length L of transition region2Successively decrease, then
Because the exhibition angular of incident ray is insufficient, and there is bright dark areas to occur, wherein a preferable implementation state is then to make transition region 12
Development length L2For 6mm.
It is backlight module manufacturing method block diagram, the pressure of better embodiment of the present invention please referring next to Fig. 4~Fig. 6
Impression forms the schematic diagram of exhibition light micro-structure at the schematic diagram and coining of guide-lighting groove.And please arrange in pairs or groups again refering to fig. 1~Fig. 3 and figure
8A~Figure 11.As shown, the present invention also disclose it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle backlight module 3 manufacture
Method comprises the steps of.Firstly, providing a light conducting plate body 10, there is light conducting plate body 10 incidence surface 101, one to go out light
Face 102 and a transition region 12, and the thickness T of light conducting plate body 10 is between 1.5~2.5mm, wherein incidence surface 101 and light-emitting surface
102 are arranged for perpendicular abutment, and transition region 12 is located at light-emitting surface 102, and from 101 top edges of incidence surface towards far from incidence surface 101
Direction extend, development length L be 5.5~6.5mm (step S01).Then, a plurality of guide-lighting grooves 13 are imprinted in light-emitting surface
102, wherein guide-lighting groove 13 is respectively V-structure, the depth D of each leaded light groove 13 appoints two adjacent lead between 38~42 μm
The spacing of light groove 13 is between 270~330 μm (step S02).A plurality of exhibition light micro-structures 11 are imprinted in incidence surface 101, wherein
It opens up light micro-structure 11 to be distributed upward from the lower edge of incidence surface 101 and be continuous arrangement, each light micro-structure 11 of opening up is outer pillar
Shape, and the section of each exhibition light micro-structure 11 is that top has a curved arc section 111, two sides of the bottom have the shape of an oblique straight section 112 respectively；
Wherein, respectively exhibition light micro-structure 11 accounts for the 13~23% of 101 area of incidence surface, each protrusion length L for opening up light micro-structure 111Between 27
~33 μm, appoint the spacing P of two adjacent curved arc sections 1122Between 70~76 μm, angle, θ folded by two adjacent oblique straight sections 112 is appointed to be situated between
In 46~66 degree (step S03).Wherein, it is noted that abovementioned steps sequence is non-to limit the manufacturing method of the present invention
Sequencing can first imprint guide-lighting groove 13 as previously described and imprint the exhibition micro- knot of light again actually when manufacturing backlight module 3
Structure 11, or first coining exhibition light micro-structure 11 imprint again guide-lighting groove 13 etc. all can, herein in order to be conducive to illustrate, just manufacturing
Sequentially for first imprinting guide-lighting groove 13 and imprint exhibition light micro-structure 11 again.When light conducting plate body 10 makes guide-lighting ditch through coining
Slot 13 and Zhan Guang micro-structure 11 shape after forming foregoing light guide plate 1, that is, a plurality of LED light sources 2 are arranged in incidence surface
101, and LED light source 2 and 101 distance A of incidence surface remains 0.25~0.45mm, appoints the spacing P of two adjacent LED light sources 21
Then between 19.5~19.9mm (step S04), and complete the manufacture of backlight module 3.As a result, in application, backlight module 3
Generated optical interference phenomena when light guide plate 1 exists simultaneously guide-lighting groove 13 with Zhan Guang micro-structure 11 can be eliminated, and has pole
Good goes out optical property, and product quality is substantially improved, and have the display equipment carried can and more preferably shows efficiency.
Imprint a preferred embodiment of guide-lighting groove 13 and Zhan Guang micro-structure 11, for through idler wheel in a manner of rolling
It works on incidence surface 101 and light-emitting surface 102.As shown in figure 5, in having 13 shape of corresponding guide-lighting groove on the surface of idler wheel
Flank, and correspondence be placed at the light-emitting surface 102 of light conducting plate body 10, and rear roller contact light-emitting surface 102 and moving in rotation be
The guide-lighting groove 13 of formation can be imprinted on light-emitting surface 102, it is mobile to make 10 counter roller of light conducting plate body in specific manufacture, and rolls
Wheel maintains rotation coining, and idler wheel can also be made to be imprinted in a manner of the horizontal displacement in rotation.As shown in fig. 6, being then utilization
Idler wheel imprints the signal state of exhibition light micro-structure 11 in incidence surface 101, corresponds to exhibition light micro-structure 11 in then having on this idler wheel
The flank of shape, and correspondence is placed at incidence surface 101, wherein due to disclosed herein exhibition light micro-structure 11 be in from incidence surface
101 lower edges are distributed upward, and account for 13~23% setting state of 101 area of incidence surface, and a preferably rolling scheme can
On the basis of to be corresponded on idler wheel at incidence surface lower edge, upwardly extends regional scope surrounded by frame after certain length and be laid with
Aforementioned flank, and those exhibition light micro-structures 11 can be certainly formed after being stamped incidence surface 101 in specified regional scope.
Wherein, each structure size ratio shown in figure only for the benefit of illustrates the use of its structure feature and relative position, practical scale with
In specification text it is recorded based on.
About items such as the scale condition of light conducting plate body 10, the shape of exhibition light micro-structure 11 and guide-lighting groove 13 and sizes
Part, sets reason and relevant verifying explanation is described in aforementioned paragraphs, repeats no more in this, is please arranged in pairs or groups again refering to preceding
State related content and corresponding diagram.
In conclusion it is disclosed have both be higher by brilliant degree and it is high enter light exhibition angle light guide plate and backlight module manufacture
Method discloses and limits constituted structure using specific scale, has effectively had both light guide plate and is higher by brilliant degree and height enters light
Generated optical interference phenomena, significantly improves light guide plate when opening up angle, while eliminating two kinds of structures again and being stored in light guide plate
Optical property out, to provide the optical articles of higher order, high quality.And be not easy in view of the production now for large-size light-conducting plate,
Disclosed light guide plate adopts extrusion type exhibition light micro-structure and guide-lighting groove is made, and can solve passing utilize and project
Molding or Tool in Cutting can not be suitable for the problem of large-size light-conducting plate is made.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle light guide plate wrapped for receiving the light of a plurality of LED light sources
Contain:
One light conducting plate body has an incidence surface and a light-emitting surface with a thickness of 1.5~2.5mm, and the light-emitting surface and the incidence surface hang down
Straight adjacent to export for light, which remains 0.25~0.45mm with those LED light sources at a distance from, it is times two adjacent those
The spacing of LED light source is 19.5~19.9mm；
A plurality of exhibition light micro-structures form in the incidence surface through rolling mode and are continuous arrangement, and respectively the exhibition light micro-structure is in
Evagination column, and its section is that top has a curved arc section, two sides of the bottom have the shape of an oblique straight section respectively；Wherein, each exhibition light
Micro-structure is distributed upward from the lower edge of the incidence surface, accounts for the 13~23% of the incidence surface area, respectively the exhibition light micro-structure
Protrude length between 27~33 μm, appoint those two adjacent curved arc sections spacing between 70~76 μm, appoint it is two adjacent those tiltedly
Angle folded by straight section is between 46~66 degree；
One transition region is located at the light-emitting surface, and extends from the top edges of the incidence surface towards the direction far from the incidence surface, extends
Length is 5.5~6.5mm；And
A plurality of leaded light grooves are distributed in the light-emitting surface and are V-structure, respectively the leaded light groove through forming mode is extruded
Depth between 38~42 μm, and appoint the spacing of those two adjacent guide-lighting grooves between 270~330 μm.
2. have both as described in claim 1 be higher by brilliant degree and it is high enter light exhibition angle light guide plate, which is characterized in that the light guide plate
Ontology with a thickness of 2.2mm.
3. have both as described in claim 1 be higher by brilliant degree and it is high enter light exhibition angle light guide plate, which is characterized in that the respectively exhibition light
The protrusion length of micro-structure is 30 μm, and appointing the spacing of those two adjacent curved arc sections is 73 μm, appoints those two adjacent oblique straight sections
Folded angle is between 54~57 degree.
4. have both as described in claim 1 be higher by brilliant degree and it is high enter light exhibition angle light guide plate, which is characterized in that the leaded light ditch
The depth of slot is 40 μm, and appointing the spacing of those two adjacent guide-lighting grooves is 300 μm.
5. have both as described in claim 1 be higher by brilliant degree and it is high enter light exhibition angle light guide plate, which is characterized in that those LED
Light source is 0.35mm at a distance from the incidence surface, and appointing the spacing of those two adjacent LED light sources is 19.7mm.
6. it is a kind of have both be higher by brilliant degree and it is high enter light exhibition angle backlight module manufacturing method comprising the steps of:
A light conducting plate body is provided, which has an incidence surface, a light-emitting surface and a transition region, and the light guide plate sheet
The thickness of body is between 1.5~2.5mm, and wherein the incidence surface and the light-emitting surface are perpendicular abutment setting, which, which was located at, to go out
Smooth surface, and extend from the top edges of the incidence surface towards the direction far from the incidence surface, development length is 5.5~6.5mm；
A plurality of guide-lighting grooves are imprinted in the light-emitting surface, wherein those guide-lighting grooves are respectively V-structure, respectively the leaded light groove
Depth appoints the spacing of those two adjacent guide-lighting grooves between 270~330 μm between 38~42 μm；
A plurality of exhibition light micro-structures are imprinted in the incidence surface, wherein those exhibition light micro-structures from the lower edge of the incidence surface upward
It is distributed and is continuous arrangement, respectively the exhibition light micro-structure is evagination column, and respectively the section of the exhibition light micro-structure is that top tool one is curved
Segmental arc, two sides of the bottom have the shape of an oblique straight section respectively；Wherein, respectively the exhibition light micro-structure account for the incidence surface area 13~
23%, respectively the protrusion length of the exhibition light micro-structure is between 27~33 μm, appoint the spacing of those two adjacent curved arc sections between 70~
76 μm, appoint angle folded by those two adjacent oblique straight sections between 46~66 degree；And
A plurality of LED lights are set derived from the incidence surface, and those LED light sources remain 0.25 at a distance from the incidence surface~
0.45mm appoints the spacing of those two adjacent LED light sources between 19.5~19.9mm.
It is higher by brilliant degree 7. having both as claimed in claim 6 and enters the manufacturing method that light opens up the backlight module at angle, feature exists
In, the light conducting plate body with a thickness of 2.2mm.
It is higher by brilliant degree 8. having both as claimed in claim 6 and enters the manufacturing method that light opens up the backlight module at angle, feature exists
In respectively the protrusion length of the exhibition light micro-structure is 30 μm, and appointing the spacing of those two adjacent curved arc sections is 73 μm, is appointed two adjacent
Angle folded by those oblique straight sections is between 54~57 degree.
It is higher by brilliant degree 9. having both as claimed in claim 6 and enters the manufacturing method that light opens up the backlight module at angle, feature exists
In the depth of the leaded light groove is 40 μm, and appointing the spacing of those two adjacent guide-lighting grooves is 300 μm.
It is higher by brilliant degree 10. having both as claimed in claim 6 and enters the manufacturing method that light opens up the backlight module at angle, feature exists
In those LED light sources are 0.35mm at a distance from the incidence surface, and appointing the spacing of those two adjacent LED light sources is 19.7mm.
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| CN109975919B (en) | 2020-08-25 |
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