Background technology
Along with the development of liquid crystal display, liquid crystal display is little and take up room little etc. with thin thickness, volumeAdvantage, is liked by consumer more and more, and is widely used in various fields. Wherein, for furtherSave space, liquid crystal display to narrow frame require growing. Liquid crystal display mainly comprises:Backlight and be positioned at the display panels on backlight. The border width decisive factor of liquid crystal display itOne is the distance between LCD panel edges and backlight edge, the i.e. border width of backlight.
Fig. 1 is the stereo decomposing structural representation of a kind of side-light type back light of prior art, in prior art, carries on the backLight source from top to bottom mainly comprises successively: anti-dazzling screen 10, blooming piece 20, LGP (lightguideplate,30 LGP), light source 70, glue frame 40, reflector plate (reflector) 60 and chase 50, wherein:
Anti-dazzling screen 10, this anti-dazzling screen 10 is a rectangular hollow blooming piece, it is mainly used in preventing light leakage,Described anti-dazzling screen 10 is generally the shading rubber belt of black, and it can also be used for blooming piece 20, LGP30 grades are fixed on glue frame 40;
Blooming piece 20, comprises diffusion sheet and brightening piece etc., for diffusion and the blast etc. of light;
LGP 30, is positioned at the lower surface of described blooming piece 20, for changing line source into area source;
Light source 70, comprises multiple LED (light-emittingdiode, light emitting diode), and multiple LEDBe integrated into a lamp bar, this lamp bar sticks to by adhesive tape 80 in the groove of glue frame 40;
Glue frame 40, for fixing and bearing optical diaphragm 20, LGP 30 and light source 70, due to liquid crystalShow that panel is also placed in glue frame 40, glue frame 40 is also for buffer solution LCD panel;
Reflector plate 60, is arranged between glue frame 40 and chase 50, for the light not being scattered is reflexed to and ledOn tabula rasa 30;
Chase 50, matches with glue frame 40, for placing and protection glue frame 40;
Described glue frame 40 comprises multiple grabs 41, and described chase 50 comprises multiple draw-in grooves 51, by grab 41Realize the assembling of glue frame 40 and chase 50 with corresponding being connected of draw-in groove 51.
Fig. 2 is the top view of liquid crystal display, wherein: display panels 900 is placed in glue frame 40,Glue frame 40 is placed in chase 50, in glue frame 40 and chase 50, certainly exists gap 90, this liquid crystal displayThe border width of the backlight of device equals between the edge of display panels 900 and the edge of chase 50Beeline. Particularly, when the wall thickness of glue frame 40 is d1, the wall thickness of chase 50 is d3, glue frame 40 and ironWhen the width in the gap 90 between frame 50 is d2, the border width d=d1+d2+d3 of backlight. Wherein,Due to the restriction of condition of molding, in prior art, the wall thickness of glue frame 40 is generally more than or equal to 0.45 millimeter, glueThe width in the gap 90 between frame 40 and chase 50 is generally positioned at the scope of 0.05 millimeter to 0.1 millimeter, ironThe wall thickness of frame 50 can be positioned at the scope of 0.1 millimeter to 0.3 millimeter, therefore liquid crystal display in prior artBorder width be at least more than or equal to 0.6 millimeter.
In above-mentioned technology, blooming piece 20 and light source 70 all carry by glue frame 40 is fixing, and the frame of glue frame 40Thickness becomes a critical limitation factor of the narrow frame of backlight.
Therefore narrow frame, how to realize backlight changes into the problem demanding prompt solution into those skilled in the art.
Summary of the invention
The problem that the present invention solves is to provide a kind of LGP and backlight, fixedly holds so that LGP is realizedCarry the function of blooming piece and light source, finally realize the narrow frame of backlight.
For addressing the above problem, the invention provides a kind of LGP, comprise and be arranged on described LGPUpper surface for placing the groove of blooming piece; Be arranged on the edge of described LGP and for placing lightThe through hole in source.
Alternatively, described LGP also comprises the groove for placing light source flexible circuit board, described through holeBe arranged in described groove, described light source flexible circuit board and described light source weld together.
Alternatively, described light source flexible circuit board is pasted at described channel bottom by adhesive tape, described grooveThe degree of depth be equal to or greater than the thickness of described light source flexible circuit board and described adhesive tape.
Alternatively, the degree of depth of described groove is more than or equal to 0.08 millimeter and be less than or equal to 0.3 millimeter.
Alternatively, the thickness of described LGP is more than or equal to 0.2 millimeter and be less than or equal to 1.5 millimeters.
Alternatively, the degree of depth of described groove is equal to or greater than the thickness of described blooming piece.
Alternatively, the degree of depth of described groove is more than or equal to 0.165 millimeter and be less than 1.0 millimeters.
Alternatively, on described LGP, the edge side at light source place arranges opening, and described opening is for light sourceFlexible PCB is connected with main flexible PCB.
Alternatively, the groove outer in described LGP and described blooming piece protuberance corresponding section arrange manyIndividual the first breach, or groove outer and the corresponding setting of described blooming piece recess in described LGPMultiple protuberances.
Alternatively, described the first breach is rectangle.
Alternatively, the length of described the first breach is more than or equal to 0.5 millimeter and be less than or equal to 3.0 millimeters,The width of described the first breach is more than or equal to 0.35 millimeter and be less than or equal to 1.0 millimeters.
Alternatively, the groove outer in described LGP is also provided with and places adhesive tape and mate with described adhesive tapeThe second breach, described the second breach is more shallow than described the first breach, described the first breach is arranged at describedWithin the scope of two breach.
Alternatively, the degree of depth of described the second breach be more than or equal to 0.05 millimeter and be less than or equal to 0.2 milliRice.
In order to address the above problem, the present invention also provides a kind of backlight that comprises above-mentioned LGP, instituteStating backlight also comprises: blooming piece, light source and underframe, wherein: the lower surface setting of described LGPOn described underframe, described underframe comprises reflecting layer and metal level, described reflecting layer and described LGP phaseAdjacent; Described blooming piece is arranged in the groove of described LGP.
Alternatively, described LGP is fixed on described underframe by adhesive tape.
Alternatively, the material in described reflecting layer comprises: PETG (polyethyleneTerephthalate, PET) or/and polyethylene fibre.
Alternatively, the thickness range in described reflecting layer comprises: 0.1 millimeter～0.4 millimeter.
Alternatively, the material of described metal level comprises: iron or ferroalloy.
Alternatively, the thickness range of described metal level comprises: 0.1 millimeter～0.3 millimeter.
Alternatively, between described reflecting layer and described metal level, one deck glue is set.
Alternatively, described light source comprises multiple LED, and described multiple LED is integrated into a lamp bar.
Alternatively, four of described underframe angles arrange respectively a groove.
Alternatively, the difference in height scope bag between the upper surface of described groove and the upper surface of described LGPDraw together :-0.3 millimeter～0.3 millimeter.
Compared with prior art, the present invention has the following advantages:
1) by arrange match with blooming piece and for place the groove of blooming piece and with light source phaseJoin and for placing the through hole of light source, thereby provide one can fix and bearing optical diaphragm and light sourceLGP, make LGP can substitute the partial function of glue frame in prior art.
2), in the time that above-mentioned LGP is applied in backlight, can further adopts and comprise reflecting layer and goldThe underframe that belongs to layer is realized the cushioning effect to display panels and the fixing carrying effect to LGP,Be that LGP has substituted the repertoire of glue frame in prior art in conjunction with underframe, thereby can not comprisedThe backlight of glue frame, has realized the narrow frame of backlight.
3) owing to having save glue frame, thereby save the forming process of glue frame, the die sinking expense that can save glue frameWith, finally reduce the cost of manufacture of backlight.
4), in possibility, four angles of described underframe arrange respectively groove, thereby both can avoid liquid crystalThe bump damage of the display panels causing of the corner of display floater and the corner of underframe, again canAvoid the light of LGP to leak.
Detailed description of the invention
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawingThe specific embodiment of the present invention is described in detail.
Set forth in the following description a lot of details so that fully understand the present invention, but thisBrightly can also adopt other to be different from alternate manner described here to implement, below therefore the present invention is not subject toThe restriction of disclosed specific embodiment.
Just as described in the background section, in prior art, backlight comprises glue frame and chase, and glue frame is used forFix and bearing optical diaphragm, LGP and light source, and buffer solution LCD panel. But glue frame and ironThe matching technique more complicated of frame, and the existence of glue frame makes the border width of backlight increase glue frameGap width between width and glue frame and chase, therefore the border width of backlight is at least at 0.6 millimeterAbove.
In order to realize the narrow frame of backlight, the invention provides a kind of LGP and backlight, pass throughArrange and match with blooming piece and for placing the groove of blooming piece and matching with light source and for puttingPut the through hole of light source, can fix and the LGP of bearing optical diaphragm and light source thereby provide a kind of,Make LGP can substitute the partial function of glue frame in prior art; When above-mentioned LGP is applied to the back of the bodyIn light source time, can further adopt the underframe that comprises reflecting layer and metal level to realize LCDThe cushioning effect of plate and the fixing carrying effect to LGP, LGP has substituted existing skill in conjunction with underframeThe repertoire of glue frame in art, thus can not comprised the backlight of glue frame, realize backlightNarrow frame; Saved the cost of manufacture of backlight simultaneously.
Be elaborated below in conjunction with accompanying drawing.
Shown in figure 3 and Fig. 4, the present embodiment provides a kind of LGP, for placing blooming pieceAnd light source, the groove 1 of placing blooming piece is set at the upper surface of described LGP. Be positioned at groove 1 peripheryBe groove outer 7; The through hole 2 of placing light source is set at the edge surface of described LGP.
Because LGP is in realizing light conducting function, also need to arrange in the above and blooming pieceThe groove 1 matching, therefore LGP should have certain thickness, and this thickness is at least greater than blooming pieceThickness; And in order to make light source be arranged in LGP, the thickness of described LGP is also greater than or equalsThe thickness of light source.
The thickness of LGP described in the present embodiment can be more than or equal to 0.2 millimeter and be less than or equal to 1.5Millimeter, as: 0.2 millimeter, 0.45 millimeter, 0.8 millimeter, 1.0 millimeters or 1.5 millimeters. Indication hereinThe thickness when thickness of LGP refers to without any groove or through hole; Shown in figure 6, also can sayThe thickness H0 of groove outer 7. Shown in figure 6, the depth H 1 of described groove 1 can equal orBe greater than the thickness of described blooming piece. Preferably, the depth H 1 of described groove 1 equals described blooming pieceThickness, and the shape size of described groove 1 is all identical with the shape size of described blooming piece, therebyBeing housed in described groove 1 of described blooming piece compactness.
Described blooming piece is same as the prior art, as: can comprise the first diffusion sheet, brightening piece andTwo diffusion sheets. The thickness of described blooming piece can be more than or equal to 0.165 millimeter and be less than 1.0 millimeters,Therefore be less than under the prerequisite of thickness of LGP in the depth H 1 that ensures groove 1, recessed described in the present embodimentThe depth H 1 of groove 1 can be more than or equal to 0.165 millimeter and be less than 1.0 millimeters, as: 0.165 millimeter,0.4 millimeter, 0.65 millimeter or 0.9 millimeter.
Described light source is used for providing light, and it can comprise multiple LED, and described multiple LED can be integratedIt is a lamp bar. Correspondingly, on described LGP, be provided with multiple through holes 2, multiple through holes 2 and multiple LEDMatch. Shown in figure 6, the degree of depth of described through hole 2 can be H3.
It should be noted that, in other embodiments of the invention, described light source can also adopt cold cathodeFluorescent tube (CCFL), thermic cathode fluorimetric pipe (HCFL), external electrode fluorescent lamp (EEFL), flatThe other light sources such as face fluorescence (FFL), field-effect backlight (FE), it should not limit of the present invention at thisProtection domain.
In order to ensure the stability of LGP to light source loading, can pass through glue (as: double faced adhesive tape) by LEDStick in described through hole 2, thereby through hole 2 can equal in the size being parallel in described LGP directionThe size sum of LED and glue.
Refer to Fig. 5, and in conjunction with consulting Fig. 6, in order to realize the control to light source, described LED needsWeld together with a light source flexible circuit board (flexibleprintedcircutit, FPC). Preferably,Described LGP can also comprise the groove 5 for placing light source flexible circuit board, and described through hole 2 is arranged onIn described groove, described light source flexible circuit board is pasted at described groove 5 bottoms, described light by adhesive tapeSource flexible PCB and described LED weld together, and groove 5 matches with described light source flexible circuit board,Described light source flexible circuit board is arranged in described groove 5, thereby the upper surface of light source flexible circuit board is notCan, higher than the upper surface of LGP, can further save space. Preferably, described light source flexible circuitPlate is pasted in the bottom of described groove 5 by adhesive tape (as: double faced adhesive tape), so described groove 5 is darkDegree H2 can be equal to or greater than the thickness sum of described light source flexible circuit board and this double faced adhesive tape. Preferably,The depth H 2 of described groove 5 equals the thickness sum of described light source flexible circuit board and this double faced adhesive tape, as:The depth H 2 of described groove 5 can be more than or equal to 0.08 millimeter and be less than or equal to 0.3 millimeter, as:0.08 millimeter, 0.1 millimeter, 0.13 millimeter, 0.15 millimeter or 0.3 millimeter.
It should be noted that, between the lower surface of described groove 1 and the lower surface of described groove 5, can depositIn section poor (as shown in Figure 6), also the section of existence is not poor, and it is specifically by blooming piece and power supply flexible electricalThe factors such as the thickness of road plate determine.
Described light source flexible circuit board also needs to be connected with main flexible PCB, thereby at light source place leaded lightThe groove outer 7 of panel edges side need to arrange an opening 4; Or by light source place LGP edge sideAll remove groove outer 7. Described main flexible PCB refers to the flexible PCB of controlling backlight,It is same as the prior art, does not repeat them here.
The surrounding of described blooming piece and light source flexible circuit board top all need to paste shading rubber belt, in caseOnly light is revealed from LGP, can also better blooming piece and light source be fixed in LGP simultaneously.When pasting after shading rubber belt on light source flexible circuit board, directly over light source flexible circuit board, do not have outstanding highDegree.
In addition, in order better shading rubber belt to be sticked on to the edge of LGP, simultaneously also in order to prevent lightLearn diaphragm by anti-loaded, can also protuberance be set at the periphery of blooming piece, outside the groove in described LGPWith described blooming piece protuberance (not shown) corresponding section, multiple the first breach 3 are set along 7. Correspondingly,Described blooming piece protuberance can be housed in described the first breach 3. Only have when described the first breach 3 withWhen the location matches of described blooming piece protuberance, blooming piece correctly could be placed in described groove 1.Shape and the position of described the first breach 3 all do not limit the scope of the invention. It should be noted that,In other embodiments of the invention, the edge of described blooming piece can comprise multiple recesses, now,Groove outer in described LGP is corresponding with described blooming piece recess arranges multiple protuberances, described inProtuberance and described recess match; The edge of described blooming piece can also comprise recess and protuberance simultaneously,Correspondingly, the groove outer of described LGP arranges multiple protuberances and the first breach, described first simultaneouslyBreach and described protuberance match, and described protuberance and described recess match.
The present embodiment comprises four symmetrically arranged the first breach 3, and described the first breach 3 is rectangle,The length of described the first breach 3 can be more than or equal to 0.5 millimeter and be less than or equal to 3.0 millimeters, as:0.5 millimeter, 1.5 millimeters or 3.0 millimeters; The width of described the first breach 3 can be more than or equal to 0.35Millimeter and be less than or equal to 1.0 millimeters, as: 0.35 millimeter, 0.7 millimeter or 1.0 millimeters.
As an object lesson, shown in figure 7, due to the existence of described the first breach 3, described inBlooming piece is housed in described groove 1 and described the first breach 3. Described shading rubber belt is pasted and is coveredFace edge, LGP top including described the first breach 3.
As another object lesson, shown in figure 8, also can in the groove outer 7 in described LGPPlace adhesive tape the second breach 6 of mating with described adhesive tape to be provided with, described the second breach 6 is than described theOne breach 3 is shallow, and described the first breach 3 is arranged in described the second breach 6 scopes. Described adhesive tape is used forFixed optics diaphragm, can be normal tape, can be also shading rubber belt, now blooming piece and leaded lightIt is just passable that the shading rubber belt using between plate only need to play interception, therefore can reduce to coverThe area of shading rubber belt on blooming piece, thus viewing area backlight expanded.
The thickness of described the second breach 6 can be equal to or greater than the thickness of described adhesive tape. Preferably, described inThe thickness of the second breach 6 equals the thickness of described adhesive tape, now, is arranged on the shading in the second breach 6The upper surface of adhesive tape and the upper surface flush of described LGP. Particularly, described the second breach 6 thickness canTo be more than or equal to 0.05 millimeter and be less than or equal to 0.2 millimeter, as: 0.05 millimeter, 0.1 millimeter, 0.15Millimeter or 0.2 millimeter.
The present embodiment by arrange with blooming piece match and for place the groove 1 of blooming piece and withLight source matches and for placing the through hole 2 of light source, thereby provides one can fix and bearing optical filmThe LGP of sheet and light source, makes LGP can substitute the partial function of glue frame in prior art.
In order to realize the narrow frame of backlight, the present invention also provides a kind of backlight that does not comprise glue frame,Shown in figure 9, comprising: shading rubber belt 100, blooming piece 200, LGP 300, light source 600With underframe 500, wherein: described blooming piece 200 is arranged on the upper surface of described LGP 300, described inLight source 600 is arranged on the side of described LGP 300, and the lower surface of described LGP 300 is arranged on instituteState on underframe 500, described underframe 500 comprises reflecting layer (not shown) and metal level (not shown), instituteState reflecting layer adjacent with described LGP 300.
Wherein, described LGP 300, blooming piece 200 and light source 600 are with reference to previous embodiment. SpecificallyGround, described LGP 300 is mainly used in changing line source into area source, can pass through adhesive tape 400 (as:Two-sided tape) be fixed on described underframe 500. Described blooming piece 200 specifically can adopt this areaKnown any structure of technical staff, should not limit the scope of the invention at this.
Wherein, described shading rubber belt 100 is a rectangular hollow blooming piece, is arranged on described blooming pieceThe surrounding of 200 upper surfaces. Described shading rubber belt 100 be mainly used in preventing light reveal and by described blooming piece200 stick on the upper surface of described LGP 300.
Wherein, described underframe 500 comprises reflecting layer and metal level, by reflector plate of the prior art andSheet metal is complex as a whole, and described blooming piece 200 and described light source 600 are all fixed on described LGPOn 300, described LGP 300 can replace glue frame to realize the described blooming piece 200 of fixing carrying and instituteState the effect of light source 600, the reflecting layer after compound can substitute glue frame and realize slow to display panelsPunching effect, finally makes to have save these parts of glue frame in backlight, has realized the narrow frame of backlight;Saved the cost of manufacture of backlight simultaneously.
Wherein, the reflecting layer of described underframe 500 is both for reflexing to LGP 300 by the light not being scatteredUpper, also for realizing the cushioning effect to display panels. The material of preparing described reflecting layer can wrapDraw together: PETG is or/and polyethylene fibre. By described PETGThe reflecting layer of preparing with polyethylene fibre can with metal level carry out compound, higher to the luminance factor of light,There is good reflecting effect, and have outstanding impact resistance and abrasion resistance. It should be noted that,In other embodiment of the present invention, can also adopt other can with metal level carry out compound, to lightLuminance factor is higher and have the material of outstanding impact resistance and abrasion resistance as the material in reflecting layer.In addition, the cushioning effect to display panels can be realized in described reflecting layer.
The thickness range in described reflecting layer can comprise: 0.1 millimeter～0.4 millimeter, as: 0.1 millimeter, 0.15Millimeter, 0.25 millimeter, 0.3 millimeter or 0.4 millimeter etc.
Wherein, the material of preparing the metal level of described underframe 500 can comprise: iron or ferroalloy etc. are wear-resistantDamage and the material of impact resistance, specifically as the steel that model is SUS430, the steel that model is SUS304Material or aluminium plating zinc plate etc.
The thickness range of described metal level can comprise: 0.1 millimeter～0.3 millimeter, as: 0.1 millimeter, 0.15Millimeter, 0.2 millimeter, 0.25 millimeter or 0.3 millimeter etc.
Between described reflecting layer and described metal level, be provided with glue-line, but the very thin thickness of described glue-line, because ofThis is negligible.
The shape of described underframe 500 can be hollow, have the cuboid of an opening, thus described opticsDiaphragm 200 and LGP 300 are arranged in described cuboid.
The thickness of described underframe 500 equals the thickness of described metal level and the thickness sum in described reflecting layer,And equal the border width of backlight, therefore the scope of the border width of described backlight can comprise: 0.2 milliRice～0.7 millimeter, as: 0.2 millimeter, 0.3 millimeter, 0.45 millimeter, 0.55 millimeter or 0.7 millimeter etc.
Now, the border width minimum of described backlight can be 0.2 millimeter, backlight in itself and prior artThe border width minimum in source is 0.6 millimeter to be compared, and has reduced 2/3rds.
In the time that above-mentioned backlight is applied in liquid crystal display, shown in Figure 10, described liquid crystal displayDevice can comprise: upper Polarizer 820, be positioned at the display panels of described upper Polarizer 820 lower surfaces900, be positioned at the lower Polarizer 810 of described display panels 900 lower surfaces and be positioned at described lower PolarizerThe backlight 111 of 810 lower surfaces, described backlight 111 comprises underframe, lower Polarizer 810, liquid crystalShow that panel 900 and upper Polarizer 820 are positioned at described underframe successively.
Wherein, described display panels 900 can comprise the color membrane substrates that is oppositely arranged and array base palte,And liquid crystal layer between described color membrane substrates and described array base palte, it is for the technology of this areaPersonnel know, therefore do not repeat them here.
As a preferred version, shown in Figure 11, and in conjunction with consulting Fig. 9, Figure 11 shows that Figure 10 instituteShow the surface texture schematic diagram of a side of liquid crystal display, four angles of described underframe 500 arrange respectivelyGroove. Particularly, vertical lower than all the other positions at the vertical height D1 of the groove at four jiaos of places of underframe 500Height D2. Because blooming piece is arranged in the groove of LGP 300, therefore in the middle of described backlight 111The upper surface in region is LGP 300, and the upper surface of fringe region is shading rubber belt 100, described shading glueBe with 100 between lower Polarizer 810 and described LGP 300.
The effect that four angles place of described underframe 500 arranges groove is to avoid display panels 900The corner of corner (as: glass) and underframe 500 bump, thereby damage display panels 900;Can also avoid the light of LGP 300 to leak. Correspondingly, described groove can not be too dark, to avoidThe light of LGP 300 leaks; Described groove can not be too shallow, to avoid display panels 900The corner of corner (as: glass) and underframe 500 bump. Therefore, the vertical height of grooveArrange to ensure to avoid the light of LGP 300 that the corner of display panels 900 occurs to leak and avoidBump and be as the criterion with the corner of underframe 500. Table on the upper surface of described groove and described LGP 300The span of the difference in height between face can comprise :-0.3 millimeter～0.3 millimeter, as :-0.3 millimeter ,-0.2Millimeter, 0 millimeter, 0.1 millimeter or 0.3 millimeter etc. Preferably, the upper surface of described groove with described in leadDifference in height between the upper surface of tabula rasa 300 is 0, i.e. the upper surface of described groove and described LGP 300Upper surface flush.
The difference of the height of the upper surface of described display panels 900 and described groove equals described grooveDifference in height between the upper surface of upper surface and described LGP 300, the thickness of lower polaroid 810 and instituteState the thickness sum of anti-dazzling screen 100.
So far, realized the narrow frame of backlight and liquid crystal display.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this. AnyThose skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications,Therefore protection scope of the present invention should be as the criterion with claim limited range.