CN103486480A - Backlight module and display device - Google Patents

Backlight module and display device Download PDF

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Publication number
CN103486480A
CN103486480A CN201310463041.XA CN201310463041A CN103486480A CN 103486480 A CN103486480 A CN 103486480A CN 201310463041 A CN201310463041 A CN 201310463041A CN 103486480 A CN103486480 A CN 103486480A
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China
Prior art keywords
backlight module
blooming
lgp
blooming lamella
lamella
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CN201310463041.XA
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CN103486480B (en
Inventor
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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Priority to CN201310463041.XA priority Critical patent/CN103486480B/en
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Abstract

The embodiment of the invention discloses a backlight module and a display device, and relates to the field of display technologies. The backlight module comprises a light source, a light guide plate and a rubber frame used for packaging the backlight module. The backlight module further comprises a first optical film layer and a second optical film layer, wherein the first optical film layer is arranged on the surface of a light-emitting side of the light guide plate, and the second optical film layer is arranged on a light-emitting side of the first optical film layer. The rubber frame is provided with a protruded portion, part of the protruded portion is located between the first optical film layer and the second optical film layer to separate the first optical film layer from the second optical film layer. Thus, the backlight module can prevent relative movement between optical films and the light guide plate, and bright borders on edges of the backlight module can be avoided.

Description

A kind of backlight module and display unit
Technical field
The present invention relates to the Display Technique field, relate in particular to a kind of backlight module and display unit.
Background technology
Along with LCD(Liquid Crystal Display, liquid crystal display) the continuous progress of Display Technique, LCD has been widely used in various demonstrations field, and people are also constantly improving the requirement of LCD quality.
Because LCD self is not luminous, it is particularly important 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.The difference that backlight module is injected the display floater mode according to light can be divided into two kinds of straight-down negative and side entering types, with down straight aphototropism mode set, compare, the side entrance back module adopts side to advance light, can effectively reduce the use number of backlight, thereby reduces energy consumption, saving production cost.
In order to obtain evenly good face emergent light, the structure of backlight module used in the prior art usually as shown in Figure 1, comprises light source 1, LGP 2 and glue frame 3, and wherein, the light that light source 1 sends forms the face emergent light by LGP 2.For characteristics such as the brightness that improves this planar emergent light and uniformities; the outside of glue frame 3 also is provided with blooming piece 4 usually; this blooming piece 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 further carry out even light to the brightness of outgoing light heterogeneous, prevents the appearance of the local bright border of backlight module.A kind of like this weak point of backlight module is, because LGP 2 is tightly pushed down by glue frame 3, between blooming piece 4 and glue frame 3, by modes such as spacing or fixed legs, fix, a kind of like this fixed form is difficult to blooming piece 4 and glue frame 3 closely fixing, make blooming piece 4 be moved in the scope of glue frame 3, the soft property self had due to blooming piece 4 in addition, under the effect of the gravity of blooming piece 4 self or other external force, thereby this blooming piece 4 very easily subsides and contacts with the surface of LGP 2, thereby can cause the relative motion between blooming piece 4 and LGP 2.In order to realize the uniform of light, LGP 2 adopts the good acrylic material of light conductivity usually, its light output surface is generally the strict planar structure of not process coating or haze treatment, and the surface of blooming piece 4 has rough light scattering or optical scattering structure usually, when between blooming piece 4 and LGP 2, producing relative motion, blooming piece 4 will with LGP 2 phase mutual friction, even having slight fraying also can not affect it, the surface of blooming piece 4 uses function, but due to LGP 2 common adopted be the soft optical material that comprises acrylic, thereby will the fray light output surface of LGP 2 of blooming piece 4, cause the inhomogeneous of backlight module bright dipping, thereby 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, prior art has proposed another kind of backlight module, and its structure as shown in Figure 2.With the difference of the backlight module shown in Fig. 1, be, blooming piece 4 directly is 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 the LGP 2 also can't relative motion under concuss.A kind of like this weak point of backlight module is, the light of light source 1 outgoing should directly enter in LGP 2 usually, but in the process of using in reality, usually there is certain fit-up gap between glue frame 3 and blooming piece 4, be difficult to compress fully, therefore warpage also just easily occurs in LGP 2, this will cause light source 1 to be difficult to and LGP 2 complete matchings, thereby make a part of light (as shown by the arrows in Figure 2) penetrate from the edge of LGP 2, this part light will directly enter in blooming piece 4, because blooming piece 4 has the anaclasis characteristic, can obtain well diffusion and even light from the light of these blooming piece 4 bottom incidents, and will converge within the specific limits from the light of the side incident of this blooming piece 4, thereby produce very strong converging light at glue frame 3 for the fringe region A hidden, even light source 1 can with LGP 2 complete matchings, still can there be the converging light of some strength in this zone, thereby cause the marginal position of backlight module to produce the bright border that human eye can be observed, particularly for the backlight module of narrow frame, because the width of glue frame 3 is limited, this bright border phenomenon will 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 the relative motion between blooming piece and LGP, avoid 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, provide a kind of backlight module, comprising: light source, LGP and glue frame, and described backlight module also comprises:
The the second blooming lamella that is arranged at the first blooming lamella of described LGP bright dipping side surface and is arranged at 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.
Wherein, the protuberance of described glue frame is the stepped location structure of two-stage inwardly reduced 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 film.
Especially, when the blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degree prismatic lens and 90 degree prismatic lenses;
Described the first blooming lamella comprises described 0 degree prismatic lens;
Described 90 degree prismatic lenses all are arranged in described the second blooming lamella.
Perhaps, when the blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degree prismatic lens and 90 degree prismatic lenses;
Described 0 degree prismatic lens and described 90 degree prismatic lenses all are arranged in described the second blooming piece.
Wherein, it should be noted that, in whole embodiment of the present invention, 0 degree prismatic lens not only comprises a kind of like this prismatic lens that the prism angle is 0 degree, this 0 degree prismatic lens can refer to that the prism angle is the prismatic lens that comprises the pre-set interval of 0 degree, described pre-set interval can be 10 degree with interior angular interval, in like manner, 90 the degree prismatic lenses can refer to that the prism angle is the prismatic lens that comprises the pre-set interval of 90 degree.
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 an end of described LGP; Or,
Described LGP is arranged at the bright dipping side of evenly distributed a plurality of described light sources.
The embodiment of the present invention on the other hand, provides a kind of display unit, comprising: backlight module and 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 comprises light source, LGP and glue frame, the the second blooming lamella that further comprises the first blooming lamella of the bright dipping side surface that is arranged at LGP and be arranged at the first blooming lamella bright dipping side, wherein, glue frame protuberance part is between the first blooming lamella and the second blooming lamella, so that the first blooming lamella and the second blooming lamella are separated.Adopt a kind of like this backlight module of structure, by the blooming lamella being split to the both sides up and down of glue frame, with the backlight module of diaphragm underlying in prior art, compare, 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 fixing more accurately, blooming lamella and the LGP of having realized downside are fixing more closely, thereby can prevent the relative motion between blooming lamella and LGP, prevent that LGP from being frayed, and the surface of blooming lamella has rough light scattering or optical scattering structure usually, even the phase mutual friction occurs in upper and lower two-layer blooming lamella, produce slight fraying and also can not affect its use function, on the other hand, because blooming lamella and the LGP of downside are fixing more closely, greatly prevented LGP generation warpage, thereby can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at the brightness light heterogeneous that the blooming lamella of upside can the edge outgoing and further carry out even light, thereby can effectively avoid the marginal position of backlight module to produce bright border, improve the quality of display unit.
The accompanying drawing explanation
The partial structurtes schematic diagram that Fig. 1 is the backlight module put on a kind of blooming piece in prior art;
The partial structurtes schematic diagram of the backlight module that Fig. 2 is a kind of blooming piece underlying in prior art;
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.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain, belong 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, LGP 32 and glue frame 33, and this backlight module also comprises:
The the second blooming lamella 35 that is arranged at the first blooming lamella 34 of LGP 32 bright dipping side surfaces and is arranged at the first blooming lamella 34 bright dipping sides.
Wherein, glue frame 33 has protuberance 331, and these protuberance 331 parts, between the first blooming lamella 34 and the second blooming lamella 35, are separated this first blooming lamella 34 and the second blooming lamella 35.
It should be noted that, backlight module is mainly used in providing uniform and stable area source for display unit, as shown in Figure 3, in embodiments of the present invention, backlight module comprises light source 31 and LGP 32, this LGP 32 can be converted into the light of light source 31 incidents area source and, from a side surface outgoing of LGP 32, the exiting surface of this LGP 32 side can be called to the bright dipping side.For example, in backlight module as shown in Figure 3, the upside of this backlight module is the bright dipping side.Owing to being in embodiment in the present invention, backlight module also comprises the various hierarchical structures such as the first blooming lamella and the second blooming lamella, these hierarchical structures usually and plane parallel and the printing opacity at LGP 32 places, therefore, in order to distinguish the both sides of above-mentioned each hierarchical structure, beam projecting one side can be called to bright dipping side (being upside in Fig. 3), the surface that is positioned at each hierarchical structure upside is the bright dipping side surface.
The backlight module that the embodiment of the present invention provides, this backlight module comprises light source, LGP and for encapsulating the glue frame of described backlight module, the the second blooming lamella that further comprises the first blooming lamella of the bright dipping side surface that is arranged at LGP and be arranged at the first blooming lamella bright dipping side, wherein, glue frame protuberance part is between the first blooming lamella and the second blooming lamella, so that the first blooming lamella and the second blooming lamella are separated.Adopt a kind of like this backlight module of structure, by the blooming lamella being split to the both sides up and down of glue frame, with the backlight module of diaphragm underlying in prior art, compare, 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 and fix more accurately, realized that blooming lamella and LGP are fixing more closely
Thereby can prevent the relative motion between blooming lamella and LGP, greatly prevent that LGP from being frayed, and the surface of blooming lamella has rough light scattering or optical scattering structure usually, even the phase mutual friction occurs upper and lower two-layer blooming lamella, producing slight fraying can not affect its use function yet; On the other hand, the blooming lamella that is positioned at upside can further carry out even light to the brightness of outgoing light heterogeneous, thereby can effectively avoid the marginal position of backlight module to produce bright border, improves the quality of display unit.
In backlight module as shown in Figure 3, also comprise the backboard 36 for carrying this backlight module, the surface of this backboard 36 is disposed with reflexed light film 37 and LGP 32, one end of this LGP is provided with light source 31, and the light that this light source 31 sends can form the upwards area source of outgoing through the effect of reflexed light film 37 and LGP 32.Can be clear that, the light of this area source will pass through respectively the first blooming lamella 34 and the second blooming lamella 35 outgoing, with the backlight module of diaphragm underlying in prior art, compare, the thickness of the first blooming lamella 34 that is positioned at downside is lower, can reduce so the fixing gap of glue frame 33, make between glue frame 33 and LGP 32 and fix more accurately, realized that the first blooming lamella 34 and LGP 32 are fixing more closely.Because the first blooming lamella 34 and LGP 32 are fixing more closely, prevented that LGP 32 from warpage occurring, thereby can avoid to a certain extent light to penetrate from the edge of LGP 32, be positioned at the brightness light heterogeneous that the second blooming lamella 35 of the first blooming lamella 34 bright dipping sides can the edge outgoing and further carry out even light, thereby can effectively avoid the marginal position of backlight module to produce bright border, improve the quality of display unit.A kind of like this 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, and the spacing between this protuberance 331 and LGP 32 can equal or be slightly larger than the thickness of the first blooming lamella 34.In embodiments of the present invention, can mainly rely on the second blooming lamella 35 that is positioned at upper strata to improve brightness backlight, uniformity and improve subjective image quality expressive force, therefore compared with prior art, be positioned at the first blooming lamella 34 of lower floor without comprising the several functions diaphragm, the thickness of the first blooming lamella 34 obviously reduces, when backlight module has backboard 36, surrounding at this backboard 36 can be provided with the fixed structures such as a plurality of locating dowels or clip, the surrounding of the first blooming lamella 34 is provided with the fixed structure corresponding with the fixed structure on backboard 36, when the surface at LGP 32 arranges the first blooming lamella 34, the surrounding of the first blooming lamella 34 can be fastened by the spacing fixing of fixed leg or with buckling on the clip of backboard, thereby can be fixed on simply the surface of LGP 32.In addition, adopt a kind of like this glue frame 33 of structure, after the surface at LGP 32 arranges the first blooming lamella 34, glue frame 33 with protuberance 331 also can be pressed in the surrounding of the first blooming lamella 34 LGP 32 surfaces, thereby further improved fixing fastness, can reduce so the fixing gap of glue frame, make between glue frame and LGP fixing more accurately, blooming lamella and the LGP of having realized downside are fixing more closely, thereby make the first blooming lamella 34 and the LGP 32 also can't relative motion under concuss, further prevented that LGP from being frayed.
Further, as shown in Figure 3, the protuberance 331 of glue frame is the stepped location structure of two-stage inwardly reduced step by step, and the height difference H of two-stage ladder is more than or equal to the thickness t of the second blooming lamella 35.
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.Further, in the time of in the second blooming lamella 35 is positioned over this stepped location structure, can adopt the mode of fixed block or adhesive tape that the second blooming lamella 35 is simply fixing with glue frame 33.For example, in the stepped location structure of the surrounding of glue frame 33 or edge, a plurality of holddown grooves can be set, when the second blooming lamella 35 is arranged in stepped location structure, by insert fixed block in holddown groove, thereby the second blooming lamella 35 is pressed in the stepped location structure of glue frame 33, or directly just the second blooming lamella 35 is bonding with glue frame 33 also can to adopt adhesive tape.Certainly, the above fixed form for the second blooming lamella 35 is only also a kind of illustrating, can expect equally can be by other mode such as spacing or fixed leg the second blooming lamella 35 is 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 the stratified film structure.
For example, blooming piece comparatively commonly used can comprise upper and lower two-layer light diffusing sheet and the prismatic lens between two-layer diffusion sheet, wherein, prismatic lens can comprise again 0 degree prismatic lens and/or the 90 degree prismatic lenses with certain prism angle, adopts the combining structure of diffusion sheet and prismatic lens can further improve brightness backlight.Perhaps, blooming piece also can only comprise diffusion sheet under one deck, and the surface of this time diffusion sheet further has the combination of prismatic lens or prismatic lens and brightness enhancement film.Concrete, prismatic lens can adopt the 0 degree prismatic lens and 90 with certain prism angle to spend the combination of prismatic lenses, or can further increase the DBEF(Dual Brightness Enhancement Film with brightness enhancement function, reflection-type brightness enhancement film).Because the cost of DBEF brightness enhancement film and prismatic lens is usually higher, consider the overall cost of backlight module, blooming piece also can only comprise multilayer diffusion sheet structure.It should be noted that, the prismatic lens surface is provided with some prism structures usually, and 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 to that the 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 can comprise the multilayer functional structure equally.
Concrete, the first blooming lamella 34 can comprise at least one in the first diffusion sheet, the first prismatic lens, mist degree film or scattering film.The second blooming lamella 35 can comprise at least one in the second diffusion sheet, the second prismatic lens, brightness enhancement film, mist degree film or scattering film.It should be noted that, the prismatic lens that the embodiment of the present invention is mentioned can be to comprise that at least one has the combination of the prismatic lens of different prism angles.
In embodiments of the present invention, while thering is the different prismatic lens of multiple prism angle in the included functional structure of blooming piece, for example, when thering is the combination of 0 degree prismatic lens and 90 degree prismatic lenses simultaneously, 0 degree prismatic lens can be arranged to the first blooming lamella 34,90 degree prismatic lenses all are arranged to the second blooming lamella 35.Take the backlight module shown in Fig. 3 as example, when the first blooming lamella 34 adopts 0 degree prismatic lens, can be to the exiting surface outgoing in 0 degree prismatic lens even the light of light source 1 incident from the side part incides yet, and if the first blooming lamella 34 adopts 90 degree prismatic lenses, the light of light source 1 incident from the side partly incides in 90 degree prismatic lenses and will be converged and from the exiting surface outgoing, light converges under effect, can strengthen bright border on the contrary, therefore, the first blooming lamella 34 should avoid arranging the prismatic lens of prism angle in 90 degree left and right as far as possible.
Perhaps, while thering is the different prismatic lens of multiple prism angle in the included functional structure of blooming piece, for example, when thering is the combination of 0 degree prismatic lens and 90 degree prismatic lenses, 0 degree prismatic lens and 90 degree prismatic lenses all can be arranged in the second blooming piece 35 simultaneously.So, not only can further reduce the thickness of the first blooming lamella 34, reduce the fixing gap of glue frame, make between glue frame and LGP fixing more accurately, and adopt the combination of 0 degree prismatic lens and 90 degree prismatic lenses can also realize well spotlight effect simultaneously, further improve the 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 a kind of like this prismatic lens that the prism angle is 0 degree, this 0 degree prismatic lens can refer to that the prism angle is the prismatic lens that comprises the pre-set interval of 0 degree, described pre-set interval can be that 10 degree are with interior angular interval, in like manner, 90 degree prismatic lenses can refer to that the prism angle is the prismatic lens that comprises the pre-set interval of 90 degree.For example, 0 degree prismatic lens can comprise-7~7 degree prismatic lenses, and 90 degree prismatic lenses 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 the angular deflection existed in the counterclockwise direction, as ,-7 degree prismatic lenses can refer to 0 degree prismatic lens along deflection clockwise 7 degree.
Or the first blooming lamella 34 can only comprise one deck optical film.In addition; because blooming piece in prior art often can expand or deformation because the variation of environment temperature or humidity produces; and a kind of like this deformation increases along with the increase of blooming piece thickness; therefore; thickness and the number of plies of the first blooming lamella 34 are less, just more easily realize the accurately fixing of glue frame 33 and LGP 32.Therefore, preferred, the first blooming lamella 34 can only comprise the first diffusion sheet.So, can guarantee to a certain extent the raising of backlight illumination when having reduced the first blooming lamella 34 thickness.
Again for example, the second blooming lamella 35 can comprise at least one in the second diffusion sheet, the second prismatic lens, brightness enhancement film, mist degree film or scattering film.Preferably, the second blooming lamella 35 can comprise at least one in second diffusion sheet and 0 degree prismatic lens and 90 degree prismatic lenses, can on the limited basis raised the cost, further improve brightness backlight like this; Perhaps, the second blooming lamella 35 can also comprise at least one in a DBEF brightness enhancement film and 0 degree prismatic lens and 90 degree prismatic lenses, can improve to greatest extent brightness backlight like this, improves the 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.The combination of above various the first blooming lamella 34 and the second blooming lamella 35 all can be selected according to actual needs.
Further, the second blooming lamella 35 can also comprise multilayer mist degree and the stronger diaphragm of dispersed light, such as the diaphragms such as multilayer mist degree diffusion sheet or minute light diffusing sheet can additionally be set, thereby can be further the light heterogeneous of outgoing be carried out to even light, further improved the quality of emergent ray.
Further, light source 31 can adopt multiple known luminescent device.In embodiments of the present invention, light source 31 can adopt cathode fluorescent tube (Cold Cathode Fluorescent Lamp is called for short CCFL) or LED(Light Emitting Diode, Light-Emitting Diode) lamp.Wherein, the preferred LED lamp of light source 31, with traditional CCFL backlight photo ratio, LED-backlit has that brightness is high, low power consumption and other advantages, and just because of this, the LED-backlit module more and more is applied to various display unit.
Further, light source 31 can be positioned at an end of LGP 32, or LGP 32 can also be arranged at the bright dipping side of evenly distributed a plurality of light sources 31.In backlight module as shown in Figure 3, to take light source 31 to be positioned at the explanation that an end of LGP 32 carries out as example, wherein, as shown in Figure 3, one end of LGP 32 is different from the opposite side of bright dipping side or bright dipping side, and light source 31 is positioned at the outside one end of LGP 32 right side minor faces.
According to the difference of light source present position, the backlight module that usually light source is positioned to a side of LGP is called the side entrance back module, and the backlight module that LGP is arranged to the bright dipping side surface of evenly distributed a plurality of light sources is called down straight aphototropism mode set.Down straight aphototropism mode set is owing to having a plurality of evenly distributed light sources, thereby can make each panel matrix of display floater can obtain independently light source, Luminance Distribution is more even, the side entrance back module is that strip-shaped light source by being positioned at the LGP side is to light, collocation LGP and catoptric arrangement are realized planar bright dipping, with down straight aphototropism mode set, compare, the side entrance back module is without a large amount of light sources is set, and has lower energy consumption.
LGP can be used as the light diffusing sheet of a plurality of light sources in down straight aphototropism mode set, similar with the side entrance back module, luminous uniformly in order to realize, various blooming lamellas need to be set in down straight aphototropism mode set equally, and LGP needs strict plane equally, and in prior art, in order to guarantee rational light mixing distance, usually there is certain distance between blooming lamella and light source, so blooming lamella and LGP just are difficult to closely fixing, the relative motion meeting of blooming lamella and LGP causes will the fray light output surface of LGP of blooming piece, make the inhomogeneous of backlight module bright dipping.But down straight aphototropism mode set is different from the side entrance back module, because adopting bottom surface, down straight aphototropism mode set send light, so display unit bright border phenomenon less, but still be difficult to effectively improve the generation of bright border.
Adopt a kind of like this backlight module of structure, by the blooming lamella being split to the both sides up and down of glue frame, with the backlight module of diaphragm underlying in prior art, compare, 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 fixing more accurately, blooming lamella and the LGP of having realized downside are fixing more closely, thereby can prevent the relative motion between blooming lamella and LGP, prevent that LGP from being frayed, and the surface of blooming lamella has rough light scattering or optical scattering structure usually, even the phase mutual friction occurs in upper and lower two-layer blooming lamella, produce slight fraying and also can not affect its use function, on the other hand, because blooming lamella and the LGP of downside are fixing more closely, greatly prevented LGP generation warpage, thereby can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at the brightness light heterogeneous that the blooming lamella of upside can the edge outgoing and further carry out even light, thereby can effectively avoid the marginal position of backlight module to produce bright border, improve the quality of display unit.
The display unit that the embodiment of the present invention provides as shown in Figure 4, comprising: backlight module 41 and display floater 42, wherein, backlight module 41 is as above arbitrary described backlight module.
Concrete, display floater 42 can be the various non-self light emitting that comprises display panels, because this class display floater self is not luminous, therefore needs to arrange the backlight module with superperformance.Accordingly, display unit can be any product or parts with Presentation Function such as liquid crystal display, LCD TV, DPF, mobile phone or panel computer.In display unit as shown in Figure 4, display floater 42 is to take the explanation that display panels carries out as example.
Wherein, the structure of backlight module 41 has been done detailed explanation in the aforementioned embodiment, does not do and repeats herein.
The display unit that the embodiment of the present invention provides, comprise backlight module, this backlight module comprises light source, LGP and glue frame, the the second blooming lamella that further comprises the first blooming lamella of the bright dipping side surface that is arranged at LGP and be arranged at the first blooming lamella bright dipping side, wherein, glue frame protuberance part is between the first blooming lamella and the second blooming lamella, so that the first blooming lamella and the second blooming lamella are separated.Adopt a kind of like this backlight module of structure, by the blooming lamella being split to the both sides up and down of glue frame, with the backlight module of diaphragm underlying in prior art, compare, 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 fixing more accurately, blooming lamella and the LGP of having realized downside are fixing more closely, thereby can prevent the relative motion between blooming lamella and LGP, prevent that LGP from being frayed, and the surface of blooming lamella has rough light scattering or optical scattering structure usually, even the phase mutual friction occurs in upper and lower two-layer blooming lamella, produce slight fraying and also can not affect its use function, on the other hand, because blooming lamella and the LGP of downside are fixing more closely, prevented LGP generation warpage, thereby can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at the brightness light heterogeneous that the blooming lamella of upside can the edge outgoing and further carry out even light, thereby can effectively avoid the marginal position of backlight module to produce bright border, improve the quality of display unit.
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, and as shown in Figure 5, the method comprises:
S501, at the bright dipping side surface of LGP, the first blooming lamella is set.
S502, encapsulation backlight module, the glue frame has protuberance, and this protuberance partly is positioned at the bright dipping side surface of the first 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 as display unit provides uniform and stable area source, and in embodiments of the present invention, a side surface of backlight module is light-emitting area, opposite side is lighttight backboard, and the light-emitting area of this backlight module one side is called to the bright dipping side.For example, in backlight module as shown in Figure 3, the upside of this backlight module is the bright dipping side, and the surface that is positioned at this side is the bright dipping side surface.
The backlight module manufacture method that the embodiment of the present invention provides, this backlight module comprises light source, LGP and glue frame, the the second blooming lamella that further comprises the first blooming lamella of the bright dipping side surface that is arranged at LGP and be arranged at the first blooming lamella bright dipping side, wherein, glue frame protuberance part is between the first blooming lamella and the second blooming lamella, so that the first blooming lamella and the second blooming lamella are separated.Adopt a kind of like this backlight module of structure, by the blooming lamella being split to the both sides up and down of glue frame, with the backlight module of diaphragm underlying in prior art, compare, 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 fixing more accurately, blooming lamella and the LGP of having realized downside are fixing more closely, thereby can prevent the relative motion between blooming lamella and LGP, prevent that LGP from being frayed, and the surface of blooming lamella has rough light scattering or optical scattering structure usually, even the phase mutual friction occurs in upper and lower two-layer blooming lamella, produce slight fraying and also can not affect its use function, on the other hand, because blooming lamella and the LGP of downside are fixing more closely, prevented LGP generation warpage, thereby can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at the brightness light heterogeneous that the blooming lamella of upside can the edge outgoing and further carry out even light, thereby can effectively 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 36 for carrying this backlight module, 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, and the light that this light source 31 sends can form the upwards area source of outgoing through the effect of reflexed light film 37 and LGP 32.Can be clear that, this area source will pass through respectively the first blooming lamella 34 and the second blooming lamella 35 outgoing, and the light leak of face plate edge position is difficult to go out from the second blooming lamella 35 transmissions through blocking of glue frame protuberance 331, a kind of like this back light module unit structure of structure is simple, and can effectively prevent the appearance of display floater bright border.
Concrete, the protuberance of glue frame can be parallel with LGP, the thickness that the spacing between this protuberance and LGP 32 is the first blooming lamella.Adopt a kind of like this glue frame of structure, after the surface at LGP arranges the first blooming lamella, having the glue frame of protuberance and the snap-in structure of LGP formation can firmly fix the first blooming lamella and LGP, thereby make the first blooming lamella and the LGP also can't relative motion under concuss, further prevented that LGP from being frayed.
Further, the protuberance of glue frame is the stepped location structure of two-stage inwardly reduced step by step, and 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 that the location of upper and lower diaphragm fixes.Further, in the time of in the second blooming lamella is positioned over this stepped location structure, can adopt the mode of fixed block or adhesive tape that the second blooming lamella and glue frame is simply fixing.Certainly, the above fixed form for the second blooming lamella is also only a kind of illustrating, can expect equally can be by other mode such as spacing or fixed leg the second blooming lamella is fixed on the glue frame, the embodiment of the present invention is not restricted this.
Further, the first blooming lamella can comprise the first diffusion sheet and/or the first prismatic lens.The second blooming lamella can comprise at least one in the second diffusion sheet, the second prismatic lens or brightness enhancement film.It should be noted that, the prismatic lens that the embodiment of the present invention is mentioned can comprise that at least one has the prismatic lens of different prism angles.
Further, light source can adopt multiple known luminescent device.In embodiments of the present invention, light source can adopt cathode fluorescent tube (Cold Cathode Fluorescent Lamp is called for short CCFL) or LED(Light Emitting Diode, Light-Emitting Diode) lamp.Wherein, the preferred LED lamp of light source, with traditional CCFL backlight photo ratio, LED-backlit has that brightness is high, low power consumption and other advantages, and just because of this, the LED-backlit module more and more is applied to various display unit.
Further, light source can be positioned at a side of LGP, or light source can also evenly be arranged at the bright dipping side surface of LGP.
According to the difference of light source present position, the backlight module that usually light source is positioned to a side of LGP is called the side entrance back module, and the backlight module that light source evenly is arranged to LGP bright dipping side surface is called down straight aphototropism mode set.Down straight aphototropism mode set is owing to having a plurality of evenly distributed light sources, thereby can make each panel matrix of display floater can obtain independently light source, Luminance Distribution is more even, the side entrance back module is that strip-shaped light source by being positioned at the LGP side is to light, collocation LGP and catoptric arrangement are realized planar bright dipping, with down straight aphototropism mode set, compare, the 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 the blooming lamella being split to the both sides up and down of glue frame, with the backlight module of diaphragm underlying in prior art, compare, 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 fixing more accurately, blooming lamella and the LGP of having realized downside are fixing more closely, thereby can prevent the relative motion between blooming lamella and LGP, prevent that LGP from being frayed, and the surface of blooming lamella has rough light scattering or optical scattering structure usually, even the phase mutual friction occurs in upper and lower two-layer blooming lamella, produce slight fraying and also can not affect its use function, on the other hand, because blooming lamella and the LGP of downside are fixing more closely, prevented LGP generation warpage, thereby can avoid to a certain extent light to penetrate from the edge of LGP, be positioned at the brightness light heterogeneous that the blooming lamella of upside can the edge outgoing and further carry out even light, thereby can effectively avoid the marginal position of backlight module to produce 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 is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; 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 be as the criterion by the described protection domain with claim.

Claims (10)

1. a backlight module comprises: light source, LGP and glue frame, it is characterized in that, and described backlight module also comprises:
The the second blooming lamella that is arranged at the first blooming lamella of described LGP bright dipping side surface and is arranged at 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.
2. backlight module according to claim 1, is characterized in that, the protuberance of described glue frame is the stepped location structure of two-stage inwardly reduced 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 blooming lamella 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 1, is characterized in that, 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 film.
5. backlight module according to claim 1, is characterized in that, when the blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degree prismatic lens and 90 degree prismatic lenses;
Described 90 degree prismatic lenses all are arranged in described the second blooming lamella.
6. backlight module according to claim 1, is characterized in that, when the blooming lamella comprises prismatic lens, wherein, described prismatic lens comprises 0 degree prismatic lens and 90 degree prismatic lenses;
Described 0 degree prismatic lens and described 90 degree prismatic lenses all are arranged in described the second blooming piece.
7. backlight module according to claim 3, is characterized in that, described the first blooming lamella only comprises one deck optical film.
8. backlight module according to claim 7, is characterized in that, described the first blooming lamella is preferably and only comprises the first diffusion sheet.
9. according to the arbitrary described backlight module of claim 1-8, it is characterized in that, described light source is positioned at an end of described LGP; Or,
Described LGP is arranged at the bright dipping side of evenly distributed a plurality of described light sources.
10. a display unit comprises: backlight module and display floater, it is characterized in that, and described backlight module is described backlight module as arbitrary as claim 1-9.
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