CN1605912A - Directly-down backlight module - Google Patents
Directly-down backlight module Download PDFInfo
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- CN1605912A CN1605912A CN 200410088931 CN200410088931A CN1605912A CN 1605912 A CN1605912 A CN 1605912A CN 200410088931 CN200410088931 CN 200410088931 CN 200410088931 A CN200410088931 A CN 200410088931A CN 1605912 A CN1605912 A CN 1605912A
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- base plate
- support unit
- plate
- tangent plane
- mode set
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Abstract
The invention discloses a straight-down type backlight module, which is arranged between the bottom plate and dispersion plate of the backlight module for supporting the dispersion plate upward, the bottom plate is provided with a fixed hole and a fastening hole so as to secure the support unit which includes a flat plate, a column, a fastening bolt and a securing clasp, wherein the flat plate is arranged longitudinally to the bottom plate.
Description
Technical field
The present invention is about the down straight aphototropism mode set in the lcd technology, particularly about the support column of down straight aphototropism mode set.
Background technology
Liquid crystal display (LCD) technology one is in being applied to portable electronic products such as mobile computer, mobile phone, digital camera, Video Camera, PDA.Except these more small-sized portable products, recent large-sized liquid crystal panel manufacturing technology is also day by day ripe.For example, the desktop LCD replaces the CRT screen just gradually.LCD TV is held the light and handy advantage of its volume under the arm, also just competes with traditional tv on market at present.Liquid crystal panel (LCD panel) is the display element of most critical in the field for this reason, yet itself is not luminous, need be shown by being provided with just of a backlight.Had many kinds of backlight technology now, and in large scale (about's more than 2 cun) lcd products, often used down straight aphototropism mode set (bottom lighting module), with backlight as liquid crystal panel.
Please refer to Fig. 1, Fig. 1 is general liquid crystal panel and down straight aphototropism mode set sectional side view.As mentioned above, liquid crystal panel 10 is a non-luminous display element, need provide liquid crystal panel 10 1 backlights by module 2 backlight, makes the user can see liquid crystal panel image to display.Module 2 backlight comprises a framework 22, many tubes 24 and a diffuser plate 26.
Framework is the shallow slot structure that a base plate 221 and the upwardly extending sidewall 223 of bottom edge are constituted.Diffuser plate 26 and base plate 221 are corresponding and be set up in sidewall 223 upper ends at framework 22 edges.Many tubes 24 are arranged at the below of diffuser plate 26, on selected spacing base plate 221 arranged evenly.As shown in Figure 1, owing to many tubes 24 are put under liquid crystal panel 10, so this kind module 2 backlight is commonly referred to as down straight aphototropism mode set.Generally speaking, the upper surface of base plate 221 also can be laid reflector plate 28 or coating reflection top layer, is used for preventing the light loss that fluorescent tube 24 sends, and makes light be reflexed to diffuser plate 26.
Yet along with the increasing of LCD size, module backlight has produced problem demanding prompt solution in the part of diffuser plate.Please refer to Fig. 1, after the size of liquid crystal panel 10 and module backlight 2 strengthened, diffuser plate 26 wherein also can strengthen, and can have heavier weight.If diffuser plate 26 is still only by sidewall 223 supports of framework 22, and then the weight of its increase can cause the part of diffuser plate 26 central authorities to lower recess.But, it should be noted that diffuser plate 26 originally in order to make light directive liquid crystal panel 10 and have predetermined optical design equably, then can cause diffuser plate 26 predetermined optical designs to produce to lower recess and change, and influence the homogeneity of light.In addition, by diffuser plate that the resin material forms 26 also have because continue to bear the weight of self and produce break may, perhaps, diffuser plate 26 combines with frame side wall 223, also can produce looseningly because of the weight that can't bear diffuser plate 26, influence the assembling quality of module 2 backlight.
Therefore, in the existing technology, tend between diffuser plate 26 and base plate 221, erect a plurality of support columns, so that upwards withstand diffuser plate 26, avoid diffuser plate 26, and increase the steadiness of module 2 assemblings backlight to lower recess.
Please refer to Fig. 2, Fig. 2 shows a kind of typical support column arrangement in the prior art.Generally speaking, tend in the prior art support column 3 is designed to cone shape structure.The reason that is designed to cone-shaped structure mainly is--part light that-diffuser plate 26 contacts with support column 3 can't incident, so end face that support column 3 tops are contacted with diffuser plate 26, have less tangent plane diameter L1, will help to reduce the situation that incident ray is covered on support column 3 tops; On the other hand, for support column 3 is locked on the base plate 221, at the bottom of the awl of support column 3, often be provided with screw, so that with the lower surface of screw 32 by base plate 221, run through base plate 221 and reflector plate 28 and screw in support column 3 and bore in the screw at the ends, and then support column 3 is locked on the base plate 221.Under this kind situation, become screw owing to still need at support column 3 cone bottom shapes, therefore tend to be designed to have bigger cone bottom diameter L2 at the bottom of the awl of whole support column 3.
Yet, at present on the package program of module backlight, assembling about support column there is no corresponding automation equipment, need be with artificial assembling, so this kind can cause the increase of number of assembling steps and time cost in the mass-produced process of module backlight in the mode of screw locking support column.Therefore, also derived the support column of another kind of pattern in the prior art.
Please refer to Fig. 3, Fig. 3 shows another kind of typical support column arrangement in the prior art.The main difference of support column 4 and the support column 3 of Fig. 2 is the combination of itself and base plate 221.Support column 4 utilize with a collar 42 engage replace the combination that locks with screw among Fig. 2.As shown in FIG., has an engaging post 42 that extends at the bottom of the awl of support column 4 downwards, the tangent plane diameter of engaging post 42 is less than the cone bottom diameter L3 of support column, and a turn 44 circles are arranged on engaging post 42, and the bottom of engaging post 42 has an outer trip 46 of opening, trip 46 and the structures that engage post 42 common formation one similar anchor shapes.On the other hand, in base plate 221 and be provided with and support column 4 corresponding connecting holes.When assembling, can and engage the connecting hole that post 42 is passed down through base plate 221 with trip 46, this moment, turn 44 meetings were because external diameter be barred from base plate 221 upper surfaces greater than connecting hole, after trip 46 passes base plate 221 lower surfaces, then continue downward stress deformation again and pass the collar 42, turn 44 meetings this moment are the supported post awl end and base plate 221 extruding because passing connecting hole 44, after trip 46 passes through the collar 42 fully, trip 46 just can restore to the original state because of elastic reaction and catch on the collar 42, and the collar 42 can't be deviate from.Therefore, the turn 44 of base plate 221 tops can clamp base plate 221 with the collar 42 of below.Support column 42 then can be combined in the base plate 221 thus.
Though the mode of the prior art utilization of Fig. 3 engaging is come in conjunction with support column and base plate, the prior art that its convenience is better than Fig. 2 is utilized the mode of screw locking.Yet because Fig. 3 support column 4 utilized turn 44 fixedly the time, therefore when turn 44 was stressed, support column 4 still can slide in the scope of a length d, and it is firm that its supporting capacity is not so good as Fig. 2 support column 3 significantly.In addition, when the elastic fatigue of turn 44, the supporting capacity of support column 4 more may and then lose efficacy.
Therefore, for the research staff who is engaged in the LCD association area, how making that support column assembling in the down straight aphototropism mode set is more easy, support effect is more firm and improve its brightness disproportionation problem that causes is the important directions of researching and developing for present.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of support unit, to support the diffuser plate in the down straight aphototropism mode set.
Another object of the present invention is to provide a kind of support unit, so that the assembling quality of module integral body backlight is more firm.
Another object of the present invention is to provide a kind of support unit of being convenient to assemble,, and shorten the required time of assembling with the number of assembling steps of simplification down straight aphototropism mode set.
Another object of the present invention is to provide a kind of support unit that firmly is fixed in the module backlight, be unlikely producing loosening or slip.
Another object of the present invention is to improve shadow and the brightness disproportionation that support unit causes.
Another object of the present invention is to improve driving fit efficient between base plate and reflector plate, improve the existing bonding permanance of double faced adhesive tape.
The invention provides a kind of support unit, be arranged between the base plate and diffuser plate of module backlight, upwards supporting diffuser plate, in the base plate and a fixed orifice is set, be used for fixing support unit.Support unit comprises a cylinder, a gim peg and a slotted collar.Cylinder is erected between base plate and the diffuser plate, and its top upwards contacts the diffuser plate lower surface, to support diffuser plate.And gim peg is connected in the cylinder bottom, and passes the fixed orifice of base plate and protrude from the lower surface of base plate.Slotted collar is arranged at the base plate lower surface, can snap in and grip bolt by the gim peg side, and cylinder and slotted collar then can clamp base plate up and down, to fix support unit.
Above-mentioned gim peg more comprises disc on, a short column and a lower disc, and above-mentioned slotted collar is the split ring of a Ω shape, having two opening arms so that slotted collar can be opened when stressed outward increases the openings of sizes of slotted collar, make slotted collar snap in and grip the short column of bolt by the gim peg side, and lower disc can limit slotted collar, avoids slotted collar to break away from gim peg downwards.In addition, the thickness of last disc equals the thickness of base plate, and upward the tangent plane radius of disc is the internal diameter that equals fixed orifice, and thus, last disc can combine densely with fixed orifice, and then makes support unit more firm with combining of base plate.
Above-mentioned cylinder more comprises an awl post and an awl dish.Awl capital end contacts in the diffuser plate lower surface, in order to support diffuser plate; The awl dish is connected in awl post below, and is covered on the base plate.The inclined-plane of inclined-plane, the awl dish of awl post and the angle between the base plate are through design and have predetermined angle respectively, make light that fluorescent tube sent to produce continuous reflection on the inclined-plane of the inclined-plane of awl dish and awl post and directive awl dish directly over.
Comprehensive the above, support unit provided by the present invention is after utilizing its gim peg to pass the base plate of module backlight, uses slotted collar simply to snap in action by one, can finish the assembling of support unit, simplified the number of assembling steps of down straight aphototropism mode set, and shortened and assembled the required time.And the last disc of gim peg combines densely with fixed orifice, and the awl dish and the slotted collar of support unit clamp base plate up and down, this makes that support unit is able to firmly combine with base plate, be unlikely producing loosening or slide, and guaranteed that simultaneously support unit can provide module backlight firm supporting capacity.In addition, the present invention with directly over the light directive awl dish that fluorescent tube was sent, has therefore improved the shadow that support unit caused by the inclined-plane of awl dish and awl post, makes the brightness of module integral body backlight more average.
Description of drawings
Fig. 1 is liquid crystal panel and down straight aphototropism mode set sectional side view;
Fig. 2 shows a kind of typical support unit structure in the prior art;
Fig. 3 shows another kind of typical support unit structure in the prior art;
Fig. 4 A is module backlight 5 side cross section views of the present invention;
Fig. 4 B is the fixed orifice and the fastening hole distributed structure figure of module backlight 5 base plates of the present invention;
Fig. 5 A is the support unit D structure figure of module backlight of the present invention;
Fig. 5 B is the upward view of module backlight 5 of the present invention;
Fig. 6 A is module backlight 6 side cross section views of the present invention;
Fig. 6 B is the fixed orifice and the fastening hole distributed structure figure of module backlight 6 base plates of the present invention;
Fig. 7 A is the support unit D structure figure of module backlight 6 of the present invention; And
Fig. 7 B is the upward view of module backlight 6 of the present invention.
The figure number table of comparisons
1 liquid crystal panel, 2 module 22 frameworks 24 fluorescent tubes backlight
26 diffuser plates, 28 reflector plates, 221 base plates, 223 sidewalls
3 support units, 32 screws, 4 support units, 42 collars
404 turns, 406 trip L1 vertex of a cone diameters are colluded in 402 engagings
L2, L3 cone bottom diameter d length 5 module 51 base plates backlight
52 reflector plates, 53 light sources, 54 diffuser plates, 55 support units
511 fixed orifice 511a penetrating region 511b engaging district, 512 fastening holes
551 dull and stereotyped 552 cylinders, 553 fastening bolt 553a keys
6 module 61 base plates 62 reflector plates 63 light sources backlight
65 support units, 66 diffuser plates, 611 fixed orifice 611a penetrating regions
611b engaging district 612 fastening holes, 651 dull and stereotyped 652 cylinders
653 fastening bolt 653a key 653b chucks, 654 clips
654a short column 654b button
Embodiment
Please refer to Fig. 4 A, Fig. 4 A is installed in the side cross section view of a module backlight for support unit of the present invention.Module 5 backlight comprises a base plate 51, a reflector plate 52, a light source 53, a diffuser plate 54 and support unit of the present invention 55 at least.Wherein base plate 51 is positioned at light source 53 belows, diffuser plate 54 is positioned at light source 53 tops, reflector plate 52 is layed in base plate 51 upper surfaces, and support unit 55 is fixed in the base plate 51, with to upper support diffuser plate 54, in base plate 51 and at least one fixed orifice 511 and at least one fastening hole 512 are set, be used for fixing support unit 55.
Shown in Fig. 4 A, support unit 55 comprises a flat board 551, a cylinder 552, a fastening bolt 553, reaches a clip 554.Its middle plateform 551 is parallel to base plate 51 configurations.Cylinder 552 is convexly set in dull and stereotyped 551 upper surface, be erected between base plate 51 and the diffuser plate 54, and its top upwards contacts diffuser plate 54 lower surfaces, in order to support diffuser plate 54.Fastening bolt 553 is connected in dull and stereotyped 551 lower surface, passes the fixed orifice of base plate 51, and is buckled in the lower surface of base plate 51.Clip 554 be arranged at dull and stereotyped 551 lower surfaces and with fastening bolt 553 at a distance of a distance, can pass the fastening hole 512 of base plate 51, and be buckled in the lower surface of base plate 51.Wherein, above-mentioned fixed orifice 511 comprises a penetrating region 511a and an engaging district 511b, and the tangent plane internal diameter of engaging district 511b is less than the tangent plane internal diameter (please refer to Fig. 4 B) of penetrating region 511a.
Please refer to Fig. 5 A with further understanding the present invention, Fig. 5 A is the support unit 55 D structure figure of the present invention's module backlight.Find out that by knowing in the stereographic map fastening bolt 553 that is positioned at dull and stereotyped 551 lower surfaces more comprises a key 553a and a chuck 553b.The top of key 553a is the lower surface that contacts in dull and stereotyped 551, and has and the identical tangent plane diameter of engaging district's 511b tangent plane internal diameter.And chuck 553a is connected in key 553a below, has the big tangent plane diameter of engaging district's 511b tangent plane internal diameter.Clip 554 comprises a short column 554a and a button 554b, the top of short column 554a contacts in dull and stereotyped 551 lower surface, and have and the identical tangent plane diameter of fastening hole 512 tangent plane internal diameters, button 554b is connected in short column 554a below, has than the big tangent plane diameter of fastening hole 512 tangent plane internal diameters.
When support unit 55 desires to be assembled into this module 5 backlight, the penetrating region 511a that fastening bolt 553 can see through fixed orifice 51 earlier passes base plate 51, then again the direction of support unit 55 toward engaging district 511b moved, the tangent plane internal diameter in engaging district just equals the key tangent plane diameter of fastening bolt and less than the tangent plane diameter of chuck, can be fixed on the base plate 51 and can't move up and down because of chuck blocks the base plate driving fit so move to the support unit in engaging district.Clip 554 can be just in time above fastening hole 512 after fastening bolt 553 engagings, the application of force is compressed into fastening hole 512 with clip 554 a little again, after button 554b passes through fastening hole 512 fully, can be stuck in the lower surface of base plate 51 because of its characteristic, and then no matter reach all can be quite firm at longitudinal direction or transverse direction with fixing of 51 of support unit 55 and base plates than large diameter.Finish the aspect after the engaging, please refer to Fig. 5 B, be the upward view of its assembling after finishing.Confirm that via assembling support unit helps the processing personnel to shorten whole built-up time in a large amount of assembling process of support unit with the design of engaging and fastening really to support unit reality of the present invention.
The flat board 551 of support unit 55, use whitewash, or at its surface-coated reflecting material, though it has accounted for many areas on base plate 51, similar to existing reflecting plate because of its surperficial reflexible characteristic, therefore can reduce to the influence of 55 pairs of light of support unit minimum.
The support unit of the disclosed module backlight of the present invention is except the function that provides support the diffusion version, and more the mode that can engage thus and fasten reaches the purpose that improves reflecting plate and base plate adaptation.Between existing reflecting plate and base plate, major part is to use double faced adhesive tape to be used as bonding gum, and double faced adhesive tape loses the known disadvantage of viscosity after having had of long duration, goes up support unit of the present invention if cooperate, and can simplify the use amount that the bonding mode of two plates can also reduce gum.
And it is mutual fixing more firm in order to make between support unit and the base plate, in preferred implementation of the present invention, make the thickness of the short column 554a of the thickness of key 553a of fastening bolt 553 and clip 554 equal the thickness (as shown in Figure 4) of the base plate 51 of module 5 backlight just.In other words, this better embodiment makes fastening bolt 553 can be incorporated among the connecting hole 511a densely and clip 554 can be incorporated in the fastening hole 512 densely.Thus, between support unit 55 and the base plate 51 mutual fixing no matter all can be quite firm at longitudinal direction or transverse direction.
In another embodiment, the disclosed support unit of the present invention also can use the purpose that close other pattern Dacca.Fig. 6 A is another module side cross section view backlight of the present invention.As the above embodiments, module 6 backlight comprises a base plate 61, a reflector plate 62, a light source 63, a diffuser plate 64 and support unit of the present invention 65 at least.Wherein base plate 61 is positioned at light source 63 belows, diffuser plate 64 is positioned at light source 63 tops, reflector plate 62 shops are penetrated in base plate 61 upper surfaces, and support unit 65 is fixed in the base plate 61, with to upper support diffuser plate 64, in base plate 61 and a fixed orifice 611 and a fastening hole 612 are set, be used for fixing support unit 65.
Please refer to Fig. 7 A, it is the D structure figure of support unit 65.Be same as the support unit 55 of the foregoing description, support unit 65 has a fastening bolt 653 and a clip 654.Fastening bolt 653 similarly has a key 653a and a chuck 653b.Clip 654 has a short column 654a and a button 654b.Yet its key 653a and chuck 653b implement with another pattern, but same can and engage district 611b with its penetrating region 611a that works in coordination as long as design in the fixed orifice 611 of base plate 61, can reach the effect that is same as the foregoing description engaging, upward view after engaging is finished please refer to Fig. 7 B.
In addition, in the prior art of Fig. 2, because of needs use the screw support unit that locked, so the cylinder of support unit must have certain volume to hold screw; And the present invention utilizes the fastening bolt of support unit bottom and clip to combine with base plate, does not need screw, therefore can reduce the volume of support unit cylinder than prior art further.And each component structure of the disclosed support unit of the present invention is that unique body is shaped, and has been the finished product support unit that can act on when dispatching from the factory, and does not therefore need extra assembly operation.
Comprehensive the above, support unit provided by the present invention utilizes the fastening bolt of support unit bottom and clip to combine with base plate, can finish the assembling of support unit, simplify the number of assembling steps of down straight aphototropism mode set, and shorten and assembled the required time.And fastening bolt with clip and base plate on fixed orifice and fastening hole combine densely, make that support unit is able to firmly combine with base plate, be unlikely producing loosening or slide, and guaranteed that simultaneously support unit can provide module backlight firm supporting capacity.In addition, the present invention with directly over the light directive that fluorescent tube sent, has also improved the shadow that support unit caused by the flat board of support unit, makes the brightness of module integral body backlight more average.
Claims (5)
1. a down straight aphototropism mode set is characterized in that, comprising:
At least one light source;
One base plate is positioned at this light source below, in this base plate and at least one fixed orifice and at least one fastening hole be set;
At least one diffuser plate is positioned at this at least one light source top; And
At least one support unit, by this at least one fixed orifice and this at least one fastening hole and be fixed in this base plate, with to this diffuser plate of upper support, this support unit comprises:
One flat board, smooth on this base plate;
One cylinder is convexly set in this dull and stereotyped upper surface, and its top upwards contacts this diffuser plate lower surface;
One fastening bolt is connected in this dull and stereotyped lower surface, passes this fixed orifice of this base plate, and is buckled in the lower surface of this base plate; And
One clip, be arranged at dull and stereotyped lower surface and with this fastening bolt at a distance of a distance, pass this fastening hole of this base plate, and be buckled in the lower surface of this base plate.
2. down straight aphototropism mode set as claimed in claim 1 is characterized in that, this fastening bolt comprises:
One key, its top contact in this flat board lower surface; And
One chuck is connected in this key below, has the tangent plane diameter big than the tangent plane diameter of this key, can make this fastening bolt be fastened on this base plate by this fixed orifice.
3. down straight aphototropism mode set as claimed in claim 1 is characterized in that, this clip more comprises:
One short column, top contact in this flat board lower surface; And
One button is connected in this short column below, has the tangent plane diameter big than this fastening hole tangent plane internal diameter, to be fastened in this fastening hole.
4. down straight aphototropism mode set as claimed in claim 1 is characterized in that, this dull and stereotyped upper surface applies a reflecting material.
5. down straight aphototropism mode set as claimed in claim 1 is characterized in that, each element of this support unit is one of the forming.
Priority Applications (1)
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CNB2004100889318A CN1313871C (en) | 2004-11-09 | 2004-11-09 | Directly-down backlight module |
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CNB2004100889318A CN1313871C (en) | 2004-11-09 | 2004-11-09 | Directly-down backlight module |
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CN1605912A true CN1605912A (en) | 2005-04-13 |
CN1313871C CN1313871C (en) | 2007-05-02 |
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