CN103486480B - A kind of backlight module and display unit - Google Patents

A kind of backlight module and display unit Download PDF

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Publication number
CN103486480B
CN103486480B CN201310463041.XA CN201310463041A CN103486480B CN 103486480 B CN103486480 B CN 103486480B CN 201310463041 A CN201310463041 A CN 201310463041A CN 103486480 B CN103486480 B CN 103486480B
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blooming
lamella
backlight module
lgp
blooming lamella
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CN103486480A (en
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李响
宋志成
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Hisense Visual Technology Co Ltd
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Qingdao Hisense Electronics Co Ltd
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Abstract

The embodiment of the invention discloses a kind of backlight module and display unit, relate to Display Technique field, this backlight module comprises: light source, LGP and for encapsulating the glue frame of described backlight module, wherein, described backlight module also comprises: be arranged at the first blooming lamella of described LGP bright dipping side surface and be arranged at the second blooming lamella of described the first blooming lamella bright dipping side; Described glue frame has protuberance, and described protuberance part, between described the first blooming lamella and described the second blooming lamella, is separated described the first blooming lamella and described the second blooming lamella. Backlight module can prevent the relative motion between blooming piece and LGP like this, avoids the marginal position of backlight module to produce bright border.

Description

A kind of backlight module and display unit
Technical field
The present invention relates to Display Technique field, relate in particular to a kind of backlight module and display unit.
Background technology
Along with LCD(LiquidCrystalDisplay, liquid crystal display) Display Technique constantlyProgressive, LCD has been widely used in various demonstrations field, and people to the requirement of LCD quality alsoConstantly improving.
Because LCD self is not luminous, it is particularly heavy that the quality of the backlight module of LCD also just seems, the quality of backlight module quality will directly affect the display effect of display unit. Backlight moduleThe difference of injecting display floater mode according to light can be divided into two kinds of straight-down negative and side entering types, withDown straight aphototropism mode set is compared, and side entrance back module adopts side to enter light, can effectively subtractThe use number of few backlight, thus energy consumption, saving production cost reduced.
In order to obtain evenly good face emergent light, backlight module used in the prior artStructure conventionally as shown in Figure 1, comprises light source 1, LGP 2 and glue frame 3, wherein, and light source1 light sending is by LGP 2 forming surface emergent lights. In order to improve the brightness of this planar emergent lightAnd the characteristic such as uniformity, the outside of glue frame 3 is also provided with blooming piece 4 conventionally, this bloomingSheet 4 can comprise at least one in prismatic lens, diffusion sheet, brightness enhancement film and reflecting piece etc.,Further to improve brightness backlight, uniformity and to improve subjective image quality expressive force. In addition,The blooming piece 4 that is positioned at glue frame 3 outsides can also be further to the brightness of outgoing light heterogeneousCarry out even light, prevent the appearance of the local bright border of backlight module. A kind of like this deficiency of backlight modulePart is, because LGP 2 is tightly pushed down by glue frame 3, and blooming piece 4 and glue frame 3Between fix by modes such as spacing or fixed legs, so a kind of fixed form is difficult to lightLearn diaphragm 4 closely fixing with glue frame 3, blooming piece 4 is occurred in the scope of glue frame 3Mobile, the soft property self having due to blooming piece 4 in addition, at blooming piece 4 selfGravity or the effect of other external force under, thereby this blooming piece 4 very easily subsides and leaded lightThe surface of plate 2 contacts, thereby can cause the relative fortune between blooming piece 4 and LGP 2Moving. In order to realize the uniform of light, LGP 2 adopts the good Ya Ke of light conductivity conventionallyDead-wood material, its light output surface is generally the not strict planar structure through coating or haze treatment,And the surface of blooming piece 4 has rough light scattering or optical scattering structure conventionally, work as lightLearn while producing relative motion between diaphragm 4 and LGP 2, blooming piece 4 will with LGP 2Phase mutual friction, makes even if the surface of blooming piece 4 has slight fraying also can not affect it hardCan, but due to LGP 2 common adopted be the soft optical material including acrylic,Thereby blooming piece 4 is by the light output surface of the LGP 2 that frays, and causes backlight module bright dipping notEvenly, thus greatly reduce the quality of display unit product.
In order to overcome the problem that has relative motion between blooming piece 4 and LGP 2, existingTechnology has proposed another kind of backlight module, and its structure as shown in Figure 2. Backlight with shown in Fig. 1The difference of module is, blooming piece 4 is directly arranged at the bright dipping side surface of LGP 2,The surrounding of this blooming piece 4 is tightly pushed down fixing by glue frame 3, make blooming piece 4 and leaded lightPlate 2 also cannot relative motion under concuss. A kind of like this weak point of backlight module existsIn, the light of light source 1 outgoing should directly enter in LGP 2 conventionally, but uses in realityProcess in, between glue frame 3 and blooming piece 4, conventionally there is certain fit-up gap, be difficult toCompress completely, also just easily there is warpage in LGP 2 therefore, this will cause light source 1 be difficult toLGP 2 complete matchings, thus make a part of light (as shown by the arrows in Figure 2) from leadingThe edge of tabula rasa 2 penetrates, and this part light will directly enter in blooming piece 4, due to opticsDiaphragm 4 has anaclasis characteristic, can be well from the light of these blooming piece 4 bottom incidentsObtain diffusion and even light, and will be in certain limit from the light of the side incident of this blooming piece 4Inside converge, thus the very strong converging light of fringe region A generation for hiding at glue frame 3, evenLight source 1 can with LGP 2 complete matchings, still can there is the meeting of some strength in this regionOptically focused, thus cause the marginal position of backlight module to produce the bright border that human eye can be observed, spyNot the backlight module for narrow frame, because the width of glue frame 3 is limited, this bright border phenomenonTo be more obvious, had a strong impact on the quality of display unit product.
Summary of the invention
Embodiments of the invention provide a kind of backlight module display unit, can prevent blooming pieceAnd the relative motion between LGP, avoids the marginal position of backlight module to produce bright border.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The one side of the embodiment of the present invention, provides a kind of backlight module, comprising: light source, leaded lightPlate and glue frame, described backlight module also comprises:
Be arranged at the first blooming lamella of described LGP bright dipping side surface and be arranged at described inThe second blooming lamella of the first blooming lamella bright dipping side;
Described glue frame has protuberance, and described protuberance part is positioned at described the first blooming lamellaAnd between described the second blooming lamella, by described the first blooming lamella and described the second opticsMembrane layer is separated.
Wherein, the protuberance of described glue frame is the stepped location structure of two-stage inwardly reducing step by step;
The difference in height of two-stage ladder is more than or equal to the thickness of described the second blooming lamella.
Further, described the first blooming lamella can comprise:
At least one in the first diffusion sheet, the first prismatic lens, mist degree film or scattering film.
Described the second blooming lamella can comprise:
At least one in the second diffusion sheet, the second prismatic lens, brightness enhancement film, mist degree film or scattering filmKind.
Especially, in the time that blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0Degree prismatic lens and 90 degree prismatic lenses;
Described the first blooming lamella comprises described 0 degree prismatic lens;
Described 90 degree prismatic lenses are all arranged in described the second blooming lamella.
Or in the time that blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degreePrismatic lens and 90 degree prismatic lenses;
Described 0 degree prismatic lens and described 90 degree prismatic lenses are all arranged on described the second blooming pieceIn.
Wherein, it should be noted that, in whole embodiment of the present invention, 0 degree prismatic lens notOnly comprise that prism angle is so a kind of prismatic lens of 0 degree, this 0 degree prismatic lens can refer toPrism angle is the prismatic lens of the pre-set interval including 0 degree, and described pre-set interval can be10 degree are with interior angular interval, and in like manner, 90 degree prismatic lenses can refer to that prism angle is for comprising 90Degree is at the prismatic lens of interior pre-set interval.
Further, described the first blooming lamella only comprises one deck optical film.
Described the first blooming lamella can be preferably and only comprise the first diffusion sheet.
Further, described light source is positioned at one end of described LGP; Or,
Described LGP is arranged at the bright dipping side of evenly distributed multiple described light sources.
The embodiment of the present invention on the other hand, provides a kind of display unit, comprising: backlight moduleAnd display floater, wherein, described backlight module is backlight module as above.
The backlight module that the embodiment of the present invention provides and display unit, this backlight module comprise light source,LGP and glue frame, further comprise the first light of the bright dipping side surface that is arranged at LGPLearn membrane layer and be arranged at the second blooming lamella of the first blooming lamella bright dipping side, wherein,Glue frame protuberance part is between the first blooming lamella and the second blooming lamella, with byOne blooming lamella and the second blooming lamella are separated. Adopt a kind of like this backlight module of structure,By blooming lamella being split to the both sides up and down of glue frame, with the back of the body of diaphragm underlying in prior artOptical mode group is compared, and the thickness of blooming lamella that is positioned at downside is lower, can reduce like this glue frameFixing gap, makes between glue frame and LGP fixingly more accurately, has realized downsideBlooming lamella and LGP are fixing more closely, thereby can prevent blooming lamella and leadRelative motion between tabula rasa, prevent that LGP from being frayed, and the surface of blooming lamella is commonThere is rough light scattering or optical scattering structure, even if upper and lower two-layer blooming lamella occursPhase mutual friction, producing slight fraying can not affect its use function yet; On the other hand, due toThe blooming lamella of downside and LGP are fixing more closely, have greatly prevented LGP generationWarpage, thus can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at upsideBlooming lamella can edge outgoing brightness light heterogeneous further carry out even light, fromAnd the marginal position that can effectively avoid backlight module produces bright border, improve the quality of display unit.
Brief description of the drawings
Fig. 1 is the partial structurtes signal of the backlight module put on a kind of blooming piece in prior artFigure;
Fig. 2 is the partial structurtes signal of a kind of backlight module of blooming piece underlying in prior artFigure;
The partial structurtes schematic diagram of a kind of backlight module that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of display unit that Fig. 4 provides for the embodiment of the present invention;
The schematic flow sheet of a kind of backlight module manufacture method that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present inventionCase is clearly and completely described, and obviously, described embodiment is only one of the present inventionDivide embodiment, instead of whole embodiment. Based on the embodiment in the present invention, this area is generalThe every other embodiment that logical technical staff obtains, belongs to the scope of protection of the invention.
The backlight module that the embodiment of the present invention provides, as shown in Figure 3, comprising: light source 31, leadTabula rasa 32 and glue frame 33, this backlight module also comprises:
Be arranged at the first blooming lamella 34 of LGP 32 bright dipping side surfaces and be arranged atThe second blooming lamella 35 of one blooming lamella 34 bright dipping sides.
Wherein, glue frame 33 has protuberance 331, and these protuberance 331 parts are positioned at the first opticsBetween membrane layer 34 and the second blooming lamella 35, by this first blooming lamella 34 and secondBlooming lamella 35 is separated.
It should be noted that, backlight module is mainly used in providing uniform and stable face for display unitLight source, as shown in Figure 3, in embodiments of the present invention, backlight module comprises light source 31 and leaded lightPlate 32, this LGP 32 can be converted into area source by the light of light source 31 incidents and from leaded lightOne side surface outgoing of plate 32, can be called bright dipping side by the exiting surface of this LGP 32 side.For example, in backlight module as shown in Figure 3, the upside of this backlight module is bright dipping side.Owing to being in embodiment in the present invention, backlight module also comprises the first blooming lamella and secondThe various hierarchical structures such as blooming lamella, these hierarchical structures conventionally with the putting down of LGP 32 placesParallel and the printing opacity of face, therefore, in order to distinguish the both sides of above-mentioned each hierarchical structure, can be by lightLine outgoing one side is called bright dipping side (being upside in Fig. 3), is positioned at the table of each hierarchical structure upsideFace is bright dipping side surface.
The backlight module that the embodiment of the present invention provides, this backlight module comprise light source, LGP withAnd for encapsulating the glue frame of described backlight module, further comprise the bright dipping that is arranged at LGPThe first blooming lamella of side surface and be arranged at the second light of the first blooming lamella bright dipping sideLearn membrane layer, wherein, glue frame protuberance part is positioned at the first blooming lamella and the second bloomingBetween lamella, so that the first blooming lamella and the second blooming lamella are separated. Adopt such onePlant the backlight module of structure, by blooming lamella being split to the both sides up and down of glue frame, with existingIn technology, the backlight module of diaphragm underlying is compared, and the thickness of blooming lamella that is positioned at downside is lower,Can reduce so the fixing gap of glue frame, make between glue frame and LGP solid more accuratelyFixed, realize blooming lamella and LGP fixing more closely,
Thereby can prevent the relative motion between blooming lamella and LGP, greatly prevent from leadingTabula rasa is frayed, and the surface of blooming lamella has rough light scattering conventionally or light expandsDissipating bind structure, even if phase mutual friction occurs upper and lower two-layer blooming lamella, produces slight fraying alsoCan not affect it and use function; On the other hand, being positioned at the blooming lamella of upside can be to outgoingBrightness light heterogeneous further carry out even light, thereby can effectively avoid the limit of backlight moduleEdge position produces bright border, improves the quality of display unit.
In backlight module as shown in Figure 3, also comprise the backboard for carrying this backlight module36, the surface of this backboard 36 is disposed with reflexed light film 37 and LGP 32, this leaded lightOne end of plate is provided with light source 31, and the light that this light source 31 sends is through reflexed light film 37 and leaded lightThe effect of plate 32 can form the area source of upwards outgoing. Can be clear that this area sourceLight will pass through respectively the first blooming lamella 34 and the second blooming lamella 35 outgoing, with existingThere is the backlight module of diaphragm underlying in technology to compare, be positioned at the first blooming lamella 34 of downsideThickness is lower, can reduce so the fixing gap of glue frame 33, makes glue frame 33 and LGPFixing more accurately between 32, realize the first blooming lamella 34 and LGP 32 moreFixing closely. Because the first blooming lamella 34 and LGP 32 are fixing more closely,Prevent that LGP 32 from warpage occurring, thereby can avoid to a certain extent light from LGP32 edge penetrates, and is positioned at the second blooming lamella 35 of the first blooming lamella 34 bright dipping sidesBrightness light heterogeneous that can edge outgoing further carries out even light, thereby can effectively keep awayThe marginal position of exempting from backlight module produces bright border, improves the quality of display unit. A kind of like this knotThe back light module unit structure of structure is simple, and can effectively prevent the appearance of display floater bright border.
Concrete, the protuberance 331 of glue frame 33 can be parallel with LGP 32, this protuberance331 and LGP 32 between spacing can equal or be slightly larger than the thick of the first blooming lamella 34Degree. In embodiments of the present invention, can mainly rely on the second blooming lamella 35 that is positioned at upper strataImprove brightness, uniformity backlight and improve subjective image quality expressive force, therefore with prior artCompare, be positioned at the first blooming lamella 34 of lower floor without comprising several functions diaphragm, the first lightThe thickness of learning membrane layer 34 obviously reduces, in the time that backlight module has backboard 36, at this backboard36 surrounding can be provided with the fixed structures such as multiple locating dowels or clip, the first blooming pieceLayer 34 surrounding is provided with the fixed structure corresponding with fixed structure on backboard 36, whenWhen the surface of LGP 32 arranges the first blooming lamella 34, four of the first blooming lamella 34Week can buckle by the spacing fixing of fixed leg or with buckling on the clip of backboardClose, thereby can be fixed on simply the surface of LGP 32. In addition, adopt a kind of like this knotThe glue frame 33 of structure, after the first blooming lamella 34 being set on the surface of LGP 32, toolThere is the glue frame 33 of protuberance 331 also the surrounding of the first blooming lamella 34 can be pressed in to leaded lightPlate 32 surfaces, thus fixing fastness further improved, can reduce like this glue frame and fixGap, make between glue frame and LGP fixingly more accurately, realized the optics of downsideMembrane layer and LGP are fixing more closely, thereby make the first blooming lamella 34 and leaded lightPlate 32 also cannot relative motion under concuss, has further prevented that LGP from being frayed.
Further, as shown in Figure 3, the protuberance 331 of glue frame is two of inside reduction step by stepThe stepped location structure of level, the height difference H of two-stage ladder is more than or equal to the second blooming lamella 35Thickness t.
So, by the second blooming lamella 35 is positioned in this stepped location structure,Can realize simply the contraposition setting of the first blooming piece 34 and the second blooming piece 35. EnterOne step ground, in the second blooming lamella 35 is positioned over this stepped location structure time, can adoptBy the mode of fixed block or adhesive tape by simply fixing with glue frame 33 the second blooming lamella 35. ExampleAs, in the surrounding of glue frame 33 or the stepped location structure of edge, can arrange multiple fixingGroove, in the time that the second blooming lamella 35 is arranged in stepped location structure, by holddown grooveInterior insertion fixed block, thus the second blooming lamella 35 is pressed in to the stepped location of glue frame 33In structure, or also can adopt directly just the second blooming lamella 35 and glue frame 33 of adhesive tapeBonding. Certainly, the above fixed form for the second blooming lamella 35 is only also a kind of actExample explanation, can expect equally can be by other mode such as spacing or fixed leg by the second lightLearn membrane layer 35 and be fixed on glue frame 33, the embodiment of the present invention is not restricted this.
In the prior art, in order to improve the quality of the planar emergent light that backlight module sends,The blooming piece that is positioned at glue frame upside or downside can comprise stratified film structure.
For example, comparatively conventional blooming piece can comprise upper and lower two-layer light diffusing sheet and be positioned atPrismatic lens between two-layer diffusion sheet, wherein, prismatic lens can comprise again having certain prism angle0 degree prismatic lens of degree and/or 90 degree prismatic lenses, the combining structure of employing diffusion sheet and prismatic lens canFurther to improve brightness backlight. Or blooming piece also can only comprise under one deck and spreadingSheet, the surface of this lower diffusion sheet further has the combination of prismatic lens or prismatic lens and brightness enhancement film.Concrete, prismatic lens can adopt 0 degree prismatic lens and the 90 degree prisms with certain prism angleThe combination of sheet, or can further increase the DBEF(DualBrightness with brightness enhancement functionEnhancementFilm, reflection-type brightness enhancement film). Due to DBEF brightness enhancement film and prismatic lensCost is conventionally higher, considers the overall cost of backlight module, and blooming piece also can only compriseMultilayer diffusion sheet structure. It should be noted that, prismatic lens surface is provided with some prism knots conventionallyStructure, the surface of these prism structures and the angle of incident light are the angle of this prismatic lens. For example,0 degree prismatic lens refers to that the surface of prism structure is parallel with incident light, and 90 degree prismatic lenses refer toThe surface of prism structure is vertical with incident light.
In embodiments of the present invention, in order to improve the quality of emergent light, blooming piece equally canComprise multilayer functional structure.
Concrete, the first blooming lamella 34 can comprise the first diffusion sheet, the first prismatic lens,At least one in mist degree film or scattering film. The second blooming lamella 35 can comprise the second diffusionAt least one in sheet, the second prismatic lens, brightness enhancement film, mist degree film or scattering film. Need explanation, the prismatic lens that the embodiment of the present invention is mentioned can be to comprise that at least one has different ribsThe combination of the prismatic lens of mirror angle.
In embodiments of the present invention, when thering is multiple rib in the included functional structure of blooming pieceWhen the different prismatic lens of mirror angle, for example, there are 0 degree prismatic lens and 90 degree prismatic lenses when simultaneouslyCombination time, 0 degree prismatic lens can be arranged to the first blooming lamella 34, by 90 degree prismsSheet is all arranged at the second blooming lamella 35. Taking the backlight module shown in Fig. 3 as example, when firstWhen blooming lamella 34 adopts 0 degree prismatic lens, even if the light of light source 1 incident from the side part entersBeing mapped to can be to exiting surface outgoing, and if the first blooming lamella 34 adopts in 0 degree prismatic lens yet90 degree prismatic lenses, the light part of light source 1 incident from the side incides in 90 degree prismatic lenses and will obtainConverge and from exiting surface outgoing, light converges under effect, can strengthen on the contrary bright border, therefore,One blooming lamella 34 should avoid arranging the prismatic lens of prism angle in 90 degree left and right as far as possible.
Or, different when thering is multiple prism angle in the included functional structure of blooming pieceWhen prismatic lens, for example, in the time thering is the combination of 0 degree prismatic lens and 90 degree prismatic lenses simultaneously, canSo that 0 degree prismatic lens and 90 degree prismatic lenses are all arranged in the second blooming piece 35. Such oneCome, not only can further reduce the thickness of the first blooming lamella 34, reduce glue frame fixingGap, makes to fix more accurately between glue frame and LGP, and adopts 0 degree rib simultaneouslyThe combination of eyeglass and 90 degree prismatic lenses can also realize spotlight effect well, further improvesThe brightness of backlight module, thereby effectively improved the quality of display unit product.
It should be noted that, in embodiments of the present invention, 0 degree prismatic lens not only comprises prismAngle is so a kind of prismatic lens of 0 degree, and this 0 degree prismatic lens can refer to that prism angle is for bagDraw together the prismatic lens of 0 degree in interior pre-set interval, described pre-set interval can be that 10 degree are with interior angleDegree is interval, and in like manner, 90 degree prismatic lenses can refer to that prism angle is presetting including 90 degreeInterval prismatic lens. For example, 0 degree prismatic lens can comprise-7~7 degree prismatic lenses, 90 degree prismsSheet can comprise 83~97 degree prismatic lenses. Certainly the above restriction of not the present invention being done for example,It should be noted that, prismatic lens angle positive and negative should be understood to clockwise or counterclockwise sideTo the angular deflection existing, as ,-7 degree prismatic lenses can refer to that 0 degree prismatic lens is along clockwiseDirection deflection 7 degree.
Or the first blooming lamella 34 can only comprise one deck optical film. In addition, byIn prior art, blooming piece often can expand or shape because the variation of environment temperature or humidity producesBecome, and a kind of like this deformation increases along with the increase of blooming piece thickness, therefore, the first lightThickness and the number of plies of learning membrane layer 34 are less, just more easily realize glue frame 33 and LGP 32Accurately fixing. Therefore, preferred, the first blooming lamella 34 can only comprise the first diffusionSheet. So, can be to a certain degree in having reduced the first blooming lamella 34 thicknessThe raising of upper guarantee backlight illumination.
Again for example, the second blooming lamella 35 can comprise the second diffusion sheet, the second prismatic lens,At least one in brightness enhancement film, mist degree film or scattering film. Preferably, the second blooming lamella 35Can comprise that second diffusion sheet and 0 degree prismatic lens and 90 spend at least one in prismatic lensesIndividual, can on the limited basis raising the cost, further improve like this brightness backlight; Or,The second blooming lamella 35 can also comprise a DBEF brightness enhancement film and 0 degree prismatic lens and 90At least one in degree prismatic lens, can improve brightness backlight so to greatest extent, improvesThe subjective image quality expressive force of display unit product; Again or, in order to reduce costs to greatest extent,The second blooming lamella 35 can also comprise at least one second diffusion sheet. Various the first light aboveLearning the combination of membrane layer 34 and the second blooming lamella 35 all can carry out according to actual needsSelect.
Further, the second blooming lamella 35 can also comprise multilayer mist degree and dispersed light strongerDiaphragm, the diaphragms such as multilayer mist degree diffusion sheet or point light diffusing sheet for example can be additionally set, fromAnd can further carry out even light to the light heterogeneous of outgoing, further improve emergent rayQuality.
Further, light source 31 can adopt multiple known luminescent device. In the invention processIn example, light source 31 can adopt cathode fluorescent tube (ColdCathodeFluorescentLamp, is called for short CCFL) or LED(LightEmittingDiode, Light-Emitting Diode) lamp.Wherein, the preferred LED lamp of light source 31, with traditional CCFL backlight photo ratio, LED-backlit toolHave that brightness is high, low power consumption and other advantages, just because of this, LED-backlit module more and more shouldFor various display unit.
Further, light source 31 can be positioned at one end of LGP 32, or LGP 32 alsoCan be arranged at the bright dipping side of evenly distributed multiple light sources 31. At mould backlight as shown in Figure 3In group, be to be positioned at taking light source 31 explanation that carry out as example one end of LGP 32, wherein, asShown in Fig. 3, one end of LGP 32 is different from the opposite side of bright dipping side or bright dipping side, light source 31Be positioned at one end, outside of LGP 32 right side minor faces.
According to the difference of light source present position, conventionally light source is positioned to a side backlight of LGPModule is called side entrance back module, and LGP is arranged to going out of evenly distributed multiple light sourcesThe backlight module of light side surface is called down straight aphototropism mode set. Down straight aphototropism mode set is owing to havingMultiple evenly distributed light sources, thus can make each panel matrix of display floater to obtainArrive independently light source, Luminance Distribution is more even, and side entrance back module is by being positioned atThe strip-shaped light source of LGP side is to light, and collocation LGP and catoptric arrangement are realized planar bright dipping,Compared with down straight aphototropism mode set, side entrance back module is without a large amount of light sources is set, and toolThere is lower energy consumption.
LGP can be used as the light diffusing sheet of multiple light sources in down straight aphototropism mode set, with sideEnter formula backlight module similar, luminous uniformly in order to realize, same in down straight aphototropism mode setSample need to arrange various blooming lamellas, and the plane that LGP equally need to be strict, and existingIn technology, in order to ensure rational light mixing distance, between blooming lamella and light source, conventionally haveCertain distance, so blooming lamella and LGP are just difficult to closely fix, blooming pieceLayer causes blooming piece by the light output surface of the LGP that frays with the relative motion meeting of LGP, makesObtain the inhomogeneous of backlight module bright dipping. But down straight aphototropism mode set is different from side entrance back module, send light, therefore display unit bright border phenomenon phase because down straight aphototropism mode set adopts bottom surfaceTo less, but still be difficult to effectively improve the generation of bright border.
Adopt a kind of like this backlight module of structure, by blooming lamella is split to the upper of glue frameLower both sides, compared with the backlight module of diaphragm underlying in prior art, are positioned at the blooming of downsideThe thickness of lamella is lower, can reduce so the fixing gap of glue frame, makes glue frame and LGPBetween fixing more accurately, realized the blooming lamella of downside and LGP more closelyFixing, thus can prevent the relative motion between blooming lamella and LGP, prevent leaded lightPlate is frayed, and the surface of blooming lamella has rough light scattering or light diffusion conventionallyStructure, even if phase mutual friction occurs upper and lower two-layer blooming lamella, produces slight fraying also notCan affect it and use function; On the other hand, due to the blooming lamella of downside and LGP moreFixing closely, greatly prevent LGP generation warpage, thereby can avoid to a certain extentLight penetrates from the edge of LGP, is positioned at that the blooming lamella of upside can edge outgoingBrightness light heterogeneous further carries out even light, thereby can effectively avoid the edge of backlight modulePosition produces bright border, improves the quality of display unit.
The display unit that the embodiment of the present invention provides, as shown in Figure 4, comprising: backlight module 41And display floater 42, wherein, backlight module 41 is as above arbitrary described backlight module.
Concrete, display floater 42 can be various non-spontaneous including display panelsLight display device, because this class display floater self is not luminous, therefore needs setting to haveThe backlight module of superperformance. Accordingly, display unit can be liquid crystal display, liquid crystal electricityDepending on any product or parts with Presentation Function such as, DPF, mobile phone or panel computers.In display unit as shown in Figure 4, display floater 42 is to carry out as an example of display panels exampleExplanation.
Wherein, the structure of backlight module 41 has been done detailed explanation in the aforementioned embodiment, thisPlace does not repeat.
The display unit that the embodiment of the present invention provides, comprises backlight module, and this backlight module comprisesLight source, LGP and glue frame, further comprise the bright dipping side surface that is arranged at LGPThe first blooming lamella and be arranged at the second blooming piece of the first blooming lamella bright dipping sideLayer, wherein, glue frame protuberance part be positioned at the first blooming lamella and the second blooming lamella itBetween, so that the first blooming lamella and the second blooming lamella are separated. Adopt so a kind of structureBacklight module, by blooming lamella being split to the both sides up and down of glue frame, in prior artThe backlight module of diaphragm underlying is compared, and the thickness of blooming lamella that is positioned at downside is lower, like thisCan reduce the fixing gap of glue frame, make to fix more accurately between glue frame and LGP,Blooming lamella and the LGP of having realized downside are fixing more closely, thereby can prevent lightLearn the relative motion between membrane layer and LGP, prevent that LGP from being frayed, and blooming pieceThe surface of layer has rough light scattering or optical scattering structure, upper and lower two-layer blooming conventionallyEven if phase mutual friction occurs lamella, producing slight fraying can not affect its use function yet; SeparatelyOn the one hand, because blooming lamella and the LGP of downside are fixing more closely, prevented from leadingTabula rasa generation warpage, thus can avoid to a certain extent light to penetrate from the edge of LGP,Being positioned at the brightness light heterogeneous that the blooming lamella of upside can edge outgoing further carries outEven light, thus can effectively avoid the marginal position of backlight module to produce bright border, improve and show dressThe quality of putting.
The embodiment of the present invention also provides a kind of backlight module manufacture method, and this backlight module comprises:Light source, LGP and for encapsulating the glue frame of backlight module, as shown in Figure 5, the method bagDraw together:
S501, at the bright dipping side surface of LGP, the first blooming lamella is set.
S502, encapsulation backlight module, glue frame has protuberance, and this protuberance part is positioned at firstThe bright dipping side surface of blooming lamella.
S503, in the bright dipping side of glue frame protuberance, the second blooming lamella is set.
It should be noted that, backlight module is mainly used in providing uniform and stable face for display unitLight source, in embodiments of the present invention, a side surface of backlight module is light-emitting area, opposite side isLighttight backboard, is called bright dipping side by the light-emitting area of this backlight module one side. For example, asIn backlight module shown in Fig. 3, the upside of this backlight module is bright dipping side, is positioned at this sideSurface is bright dipping side surface.
The backlight module manufacture method that the embodiment of the present invention provides, this backlight module comprise light source,LGP and glue frame, further comprise the first light of the bright dipping side surface that is arranged at LGPLearn membrane layer and be arranged at the second blooming lamella of the first blooming lamella bright dipping side, wherein,Glue frame protuberance part is between the first blooming lamella and the second blooming lamella, with byOne blooming lamella and the second blooming lamella are separated. Adopt a kind of like this backlight module of structure,By blooming lamella being split to the both sides up and down of glue frame, with the back of the body of diaphragm underlying in prior artOptical mode group is compared, and the thickness of blooming lamella that is positioned at downside is lower, can reduce like this glue frameFixing gap, makes between glue frame and LGP fixingly more accurately, has realized downsideBlooming lamella and LGP are fixing more closely, thereby can prevent blooming lamella and leadRelative motion between tabula rasa, prevent that LGP from being frayed, and the surface of blooming lamella is commonThere is rough light scattering or optical scattering structure, even if upper and lower two-layer blooming lamella occursPhase mutual friction, producing slight fraying can not affect its use function yet; On the other hand, due toThe blooming lamella of downside and LGP are fixing more closely, have prevented LGP generation warpage,Thereby can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at the optics of upsideMembrane layer can edge outgoing brightness light heterogeneous further carry out even light, thereby canEffectively avoid the marginal position of backlight module to produce bright border, improve the quality of display unit.
In backlight module as shown in Figure 3, also comprise the backboard for carrying this backlight module36, the bright dipping side surface of this backboard 36 is disposed with reflexed light film 37 and LGP 32,One side of this LGP is provided with light source 31, the light that this light source 31 sends through reflexed light film 37 withAnd the effect of LGP 32 can form the area source of upwards outgoing. Can be clear that, shouldArea source will pass through respectively the first blooming lamella 34 and the second blooming lamella 35 outgoing, andThe light leak of face plate edge position is difficult to from the second blooming through blocking of glue frame protuberance 331Lamella 35 transmissions and going out, a kind of like this back light module unit structure of structure is simple, and can be effectivePrevent the appearance of display floater bright border.
Concrete, the protuberance of glue frame can be parallel with LGP, this protuberance and LGP 32Between spacing be the thickness of the first blooming lamella. Adopt a kind of like this glue frame of structure, whenAfter the surface of LGP arranges the first blooming lamella, there is glue frame and the leaded light of protuberanceThe snap-in structure that plate forms can firmly be fixed the first blooming lamella and LGP, thereby makesThe first blooming lamella and LGP also cannot relative motions under concuss, further preventHaving stopped LGP is frayed.
Further, the protuberance of glue frame is the stepped location structure of two-stage inwardly reducing step by step,The difference in height of two-stage ladder is more than or equal to the thickness of the second blooming lamella.
So, by the second blooming lamella is positioned in this stepped location structure,Can realize simply the location of upper and lower diaphragm fixes. Further, when the second blooming lamellaWhile being positioned in this stepped location structure, can adopt the mode of fixed block or adhesive tape by secondBlooming lamella and glue frame are simply fixing. Certainly above fixing for the second blooming lamella,Mode is only also that one illustrates, and can expect equally can be spacing or solid by otherThe modes such as fixed column are fixed on the second blooming lamella on glue frame, and the embodiment of the present invention is not to thisBe restricted.
Further, the first blooming lamella can comprise the first diffusion sheet and/or the first prismatic lens.The second blooming lamella can comprise in the second diffusion sheet, the second prismatic lens or brightness enhancement film at leastA kind of. It should be noted that, the prismatic lens that the embodiment of the present invention is mentioned can comprise at least oneThe individual prismatic lens with different prism angles.
Further, light source can adopt multiple known luminescent device. In the embodiment of the present inventionIn, light source can adopt cathode fluorescent tube (ColdCathodeFluorescentLamp,Be called for short CCFL) or LED(LightEmittingDiode, Light-Emitting Diode) lamp. Wherein,The preferred LED lamp of light source, with traditional CCFL backlight photo ratio, LED-backlit have brightness high,Low power consumption and other advantages, just because of this, LED-backlit module is more and more applied to various aobviousShowing device.
Further, light source can be positioned at a side of LGP, or light source can also evenly be establishedBe placed in the bright dipping side surface of LGP.
According to the difference of light source present position, conventionally light source is positioned to a side backlight of LGPModule is called side entrance back module, light source is evenly arranged to the back of the body of LGP bright dipping side surfaceOptical mode group is called down straight aphototropism mode set. Down straight aphototropism mode set is multiple evenly distributed owing to havingLight source, thereby can make each panel matrix of display floater can obtain independently light source,Luminance Distribution is more even, and side entrance back module is the bar by being positioned at LGP sideShape light source is to light, and collocation LGP and catoptric arrangement are realized planar bright dipping, with downward back optical modeGroup is compared, and side entrance back module is without a large amount of light sources is set, and has lower energy consumption.
Adopt a kind of like this backlight module of structure, by blooming lamella is split to the upper of glue frameLower both sides, compared with the backlight module of diaphragm underlying in prior art, are positioned at the blooming of downsideThe thickness of lamella is lower, can reduce so the fixing gap of glue frame, makes glue frame and LGPBetween fixing more accurately, realized the blooming lamella of downside and LGP more closelyFixing, thus can prevent the relative motion between blooming lamella and LGP, prevent leaded lightPlate is frayed, and the surface of blooming lamella has rough light scattering or light diffusion conventionallyStructure, even if phase mutual friction occurs upper and lower two-layer blooming lamella, produces slight fraying also notCan affect it and use function; On the other hand, due to the blooming lamella of downside and LGP moreFixing closely, prevent LGP generation warpage, thereby can avoid to a certain extent lightPenetrate from the edge of LGP, be positioned at the brightness that the blooming lamella of upside can edge outgoingLight heterogeneous further carries out even light, thereby can effectively avoid the marginal position of backlight moduleProduce bright border, improve the quality of display unit.
The above be only the specific embodiment of the present invention, but protection scope of the present invention alsoBe not limited to this, any be familiar with those skilled in the art the present invention disclose technology modelIn enclosing, can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.

Claims (9)

1. a backlight module, comprising: light source, LGP and glue frame, it is characterized in that,Described backlight module also comprises:
Blooming lamella, described blooming lamella is to be arranged at described LGP bright dipping side surfaceThe first blooming lamella and be arranged at the second blooming of described the first blooming lamella bright dipping sideLamella;
Described glue frame has protuberance, and described protuberance part is positioned at described the first blooming lamellaAnd between described the second blooming lamella, by described the first blooming lamella and described the second opticsMembrane layer is separated;
Described the second blooming lamella comprises:
At least one in the second diffusion sheet, the second prismatic lens, brightness enhancement film, mist degree film or scattering filmKind.
2. backlight module according to claim 1, is characterized in that, described glue frame protrudingGoing out portion is the stepped location structure of two-stage inwardly reducing step by step;
The difference in height of two-stage ladder is more than or equal to the thickness of described the second blooming lamella.
3. backlight module according to claim 1, is characterized in that, described the first opticsMembrane layer comprises:
At least one in the first diffusion sheet, the first prismatic lens, mist degree film or scattering film.
4. backlight module according to claim 3, is characterized in that, described the first opticsMembrane layer only comprises one deck optical film.
5. backlight module according to claim 4, is characterized in that, described the first opticsMembrane layer only comprises the first diffusion sheet.
6. according to the arbitrary described backlight module of claim 1-5, it is characterized in that described lightSource is positioned at one end of described LGP; Or,
Described LGP is arranged at the bright dipping side of evenly distributed multiple described light sources.
7. a backlight module, comprising: light source, LGP and glue frame, it is characterized in that,Described backlight module also comprises:
Blooming lamella, described blooming lamella is to be arranged at described LGP bright dipping side surfaceThe first blooming lamella and be arranged at the second blooming of described the first blooming lamella bright dipping sideLamella;
Described glue frame has protuberance, and described protuberance part is positioned at described the first blooming lamellaAnd between described the second blooming lamella, by described the first blooming lamella and described the second opticsMembrane layer is separated;
In the time that described blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degree ribEyeglass and 90 degree prismatic lenses;
Described 90 degree prismatic lenses are all arranged in described the second blooming lamella.
8. a backlight module, comprising: light source, LGP and glue frame, it is characterized in that,Described backlight module also comprises:
Blooming lamella, described blooming lamella is to be arranged at described LGP bright dipping side surfaceThe first blooming lamella and be arranged at the second blooming of described the first blooming lamella bright dipping sideLamella;
Described glue frame has protuberance, and described protuberance part is positioned at described the first blooming lamellaAnd between described the second blooming lamella, by described the first blooming lamella and described the second opticsMembrane layer is separated;
In the time that described blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degree ribEyeglass and 90 degree prismatic lenses;
Described 0 degree prismatic lens and described 90 degree prismatic lenses are all arranged on described the second blooming lamellaIn.
9. a display unit, comprising: backlight module and display floater, is characterized in that instituteState backlight module and be the backlight module as described in as arbitrary in claim 1-8.
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Patentee after: Hisense Video Technology Co.,Ltd.

Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218

Patentee before: HISENSE ELECTRIC Co.,Ltd.