CN2727786Y - Backlight module with buffering design - Google Patents
Backlight module with buffering design Download PDFInfo
- Publication number
- CN2727786Y CN2727786Y CN 200420006467 CN200420006467U CN2727786Y CN 2727786 Y CN2727786 Y CN 2727786Y CN 200420006467 CN200420006467 CN 200420006467 CN 200420006467 U CN200420006467 U CN 200420006467U CN 2727786 Y CN2727786 Y CN 2727786Y
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- light guide
- guide plate
- lug
- module backlight
- perforate
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Abstract
The utility model relates to a backlight module for liquid crystal displays, in particular to a buffer structure designed on the frame of the module for absorbing the bumping energy from shakes and protecting important components of the backlight module such as a lamp tube or a light leading board. The backlight module comprises the light leading board and a frame. At least one side of the light leading board comprises at least one convex ear on the periphery. At least one side of the frame comprises at least one concave gap on the inner margin. The concave gap and the convex ear of the light leading board are mutual fastened for fixing the light leading board; wherein, the concave gap is provided with at least one open pore adjacent to the structure part of the frame. The open pore and the adjacent structure form a buffer structure part.
Description
Technical field
The utility model has buffer structure about design on a kind of framework of backlight liquid crystal display module, particularly this module, but the absorbing vibration impact energy, with important spare parts such as the fluorescent tube of protecting module backlight or light guide plate.
Background technology
With reference to figure 1 and Fig. 2, wherein Fig. 1 is the vertical view of traditional LCD backlight module subelement, and Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.General LCD needs extra module backlight that light source is provided, and its mode mainly is to utilize light guide plate 11 that the light that fluorescent tube 12 is produced is converted to uniform surface light source, and each element is to fix by a framework 10.
When the designed reliability of assessment module backlight, impulse test (Shock Test) is one of important pilot project.After impulse test, can not there be serious malformation in back light module unit structure, perhaps can not have the infringement of element such as light guide plate 11 or fluorescent tube 12, especially can not have the infringement of fluorescent tube 12.Because general industry circle is to adopt cold cathode fluorescent lamp (CCFL) at present, mercuryvapour is contained in fluorescent tube inside, if leak because of infringement, will cause the substantial pollution of user and environment, therefore under the requirement of environmental consciousness and client's better safe than sorry, the condition of impulse test is more and more harsher.Yet when impulse test, light guide plate 11 can be clashed into fluorescent tube 12 because of the transmission of inertia effect or vibration energy, so light guide plate 11 must be carried out suitable Fixed Design.
Yet above-mentioned Fixed Design faces harsh challenge on the engineering practice:
(1) under the short and small frivolous trend of information product, framework 10 can be used for the structure of light guide plate Fixed Design and few, under the increasing situation of this external driving wafer (Driving IC), framework 10 must be reserved the space of settling its winding displacement again, so framework 10 can reduce again more with the space of other designs.
(2) light guide plate 11 must provide uniform surface light source, and its light guide effect and optical propagation route have passed through accurate simulation and experiment, and therefore any irregular outstanding or sunk structure will cause the inhomogeneous of local light conduction effect.
(3) when vibration test, the easy and fluorescent tube bump of the light inlet side of light guide plate 11, however the light inlet side also is the light receiver side of fluorescent tube 10.Take into account at needs under the consideration of display brightness, can not between light inlet side and fluorescent tube, design any barrier structure to prevent light guide plate 11 bump fluorescent tubes 12.
Japanese kokai publication hei JP2003-66420 has disclosed a kind of light guide plate Fixed Design relevant with the problems referred to above, please refer to Fig. 3.Fluorescent tube resettlement groove 22 wherein be provided with a recess 24 in framework 21, and light guide plate has the teat (not shown) that corresponds to this recess 24, and light guide plate can be fixed in order to settle the fluorescent tube (not shown).24 places are provided with slit 23 at contiguous recess, and then form buffer structure 25.Yet this design can produce following problem in the middle of practice:
(1) it is big to implement the shared space of buffer structure: this patent forms the buffer structure of similar semi-girder with the form of slit, and shared space is big; Yet under the short and small frivolous trend of information product, and high-res needs the more wafer that drives, and framework must be reserved the space of settling its winding displacement, therefore is difficult to use this design.(2) root is easy to fracture: owing to adopt the design of similar semi-girder, cantilever root 26 is too weak, and therefore when the shock-testing condition was harsh, cantilever root 26 was easy to fracture and makes design failure.(3) be not easy to checking design: because the result of impulse test is full of unpredictability, therefore be designed into before bulk article goes into operation from drawing, must be through continuous Change In Design and actual verification.Mould must constantly be revised in this process, yet the disclosed design mould of this patent is not easy modification, and verifies time-consuming.(4) mould structure is comparatively complicated: no matter be the preceding Qualify Phase of die sinking, and the perhaps batch process design alteration after the die sinking, structure is all comparatively complicated, and the required time is also more of a specified duration, influences development process.
No. the 525791st, TaiWan, China patent announcement has disclosed the fixed form design of another kind of relevant module light guide plate backlight, please refer to Fig. 4.Its middle frame 31 has a recess 34, and light guide plate 32 has a lug 33, can fix this light guide plate 32 thereby this lug 33 fastens with recess 34.In order to prevent that by impulse test slight crack from appearring in lug turning point 35, this lug turning point 35 all is designed to fillet usually, concentrates to avoid stress.Yet because the reference quantity of framework 31 free spaces (width W of lug 33) very little usually (approximately less than 5mm), if design fillet again, straight line holding section 36 will be very little.If add the manufacturing tolerance factor of each parts of module backlight, light guide plate is easy to break away from and the bump light guide plate from recess 34 on the contrary, makes design failure; On the other hand, even use reluctantly, the ability of its impulse withstand test is not high yet.
Summary of the invention
The purpose of this utility model provides a kind of flat-panel screens of impulse withstand test module backlight.
Another purpose of the present utility model provides a kind of flat-panel screens module backlight that is easy to verify design effect and impulse withstand test.
Reach other purposes in order to achieve the above object, the utility model provides a kind of module backlight, comprises a light guide plate, and the side periphery of at least one side of this light guide plate comprises at least one lug; And framework, the side inner edge of at least one side of this framework comprises at least one depression breach, this depression breach engages to fix this light guide plate mutually with the lug of this light guide plate, wherein this depression breach is provided with at least one perforate at contiguous framed structure place, and this perforate and its proximity structure form a buffer structure portion.In the moment of shock-testing, can absorb the energy that light guide plate ear is passed over via this buffer structure portion, avoid absorbing fully and damaging by ear.
The utility model also provides a kind of module backlight, comprises a light guide plate, and the side periphery of at least one side of this light guide plate comprises at least one depression breach; And framework, the side inner edge of at least one side of this framework comprises at least one teat, this teat engages to fix this light guide plate mutually with the depression breach of this light guide plate, wherein this teat is provided with at least one perforate at contiguous framed structure place, and this perforate and its proximity structure form a buffer structure portion.
Therefore, compared with prior art, design of the present utility model can be summarized possesses following advantage:
(1) space of the shared framework of buffer structure is little.Not only easy to implement, and can keep other enough spaces and place other elements.
(2) buffer structure is stable.Can absorb the impact endurance test shock energy effectively, be difficult for produce as structural failure such as root fracture and make design failure, just can pass through shock-testing than harsh conditions.
(3) because the framework buffer structure has the function that impact energy absorbs, so the fillet curvature of light guide plate lug turning point can be dwindled, even right angle, thereby significantly increase the contact area of straight line engaging place, avoid light guide plate to break away from and hit and split fluorescent tube, thereby cause the module fluorescent tube to lose efficacy.
(4) be easy to verify design effect.Because the buffer structure handling ease, in existing machine, can utilize manual sample and be verified at once, have ageingly, and can help to solve the bottleneck that runs in the design phase at once.
(5) be easy to revise mould.Because processing is simple, only need add and bore a perforate, so can not influence the framework of mold integral when revising mould, revise the mould time-histories also than being easier to grasp.
(6) easy to implement, do not increase cost.Owing to be on mould, to do design alteration, do not need extra artificial treatment, can not increase man-hour, so be fit to produce in batches; Owing to be on mould, to do design alteration, need not extra material components, so cost remains unchanged.
(7) not only can absorb the impact energy of direction vertically, also can absorb the impact energy on the horizontal left and right directions, promote the impulse withstand test ability and the product reliability of module backlight.
Description of drawings
Fig. 1 is the synoptic diagram of module part-structure element backlight in the prior art.
Fig. 2 is the cross-sectional schematic of module part-structure element backlight in the prior art.
Fig. 3 is graphic in patent documentation in the prior art.
Fig. 4 is graphic in another patent documentation in the prior art.
Fig. 5 is the synoptic diagram of the utility model module part-structure backlight element.
Fig. 6 is the enlarged drawing of the utility model back light module unit structure.
Fig. 7 is the modification of the utility model embodiment.
Fig. 8 is the modification of the utility model embodiment.
Embodiment
Above-mentioned purpose of the present utility model and other purposes will describe in detail by following preferred embodiment and conjunction with figs. and become more apparent.
Please refer to Fig. 5 and Fig. 6 now, module backlight has a framework 100, and it can hold encirclement light guide plate 200 and a fluorescent tube 300; Light guide plate 200 has a lug 210 in periphery 220 appropriate positions of the left and right sides respectively, the lug 210 that framework 100 corresponds to light guide plate 200 has a depression breach 110, utilization depression breach 110 engages with lug 210, and light guide plate 200 can be fixed in the framework 100.Then, the most important technical characterictic of the utility model is described.Near the lower edge of lug 210, on the framework 100 of fluorescent tube 300 directions, be provided with a perforate 120, its role is to: this perforate 120 structural strength of contiguous framework 100 that can weaken, and can form a damping of shocks portion 130 in perforate 120 adjacent domains.Therefore, cause impacting or physical phenomenon such as vibrations acts on the module backlight and when making the lug 210 of light guide plate 200 clash into the depression breach 110 of frameworks 100 in the unexpected institute of impulse test or any use, the energy that impacts or shake can effectively be absorbed by damping of shocks portion 130, the lug 210 that makes light guide plate 200 is easy fracture not, especially lug 210 and periphery 220 join is connected turning point 230, because the reason that stress is concentrated, generally fracture very easily herein.In order to lower the effect that stress is concentrated, general equal rounding herein, the effect that the big more attenuating stress of fillet curvature is concentrated is good more.Yet this kind mode has its limitation, and can cause another serious problems.Increase along with fillet curvature, the lug engaging straight-line segment 240 that lug 210 can be used for fastening with the breach of framework 100 engaging straight-line segment 140 will be more and more littler, add the problem of manufacturing tolerance, very easily cause the restriction of light guide plate 200 disengaging frameworks 100 and clash into fluorescent tube.Yet, because the design of damping of shocks portion 130 reduces the fillet curvature that connects turning point 230, even can be designed to the right angle, therefore not only can further promote designed reliability, the manufacturing tolerance scope also can not need to set too harshly, can not cause the Mould Machining cost to increase.On the other hand, the first half fillet 250 of the lug 210 that is connected with first half periphery 220 also can be designed to a hypotenuse, what it was considered is under the situation that only disposes a tubes, when also even the top of light guide plate 200 does not dispose fluorescent tube, because there are not the misgivings of light guide plate bump top fluorescent tube, simple hypotenuse design can suitably disperse impulsive force, and reduces the stress concentration phenomenon.
Those skilled in the art should know by inference, and the shape of perforate 120 is not limited to rectangle shown in Figure 5, also can be circle or other polygons, and the degree of depth of perforate 120 can be a through hole, also can be a blind hole.In addition, perforate 120 is not limited to be arranged on the lower edge of lug 210, also can edge disposed thereon, or be arranged to a pair ofly, and lay respectively at the lower edge and the upper limb of lug 210, as the perforate among Fig. 7 121 and 122; And framework 101 engages with lightguide plate fixing with lug 211.In addition, please refer to Fig. 8, the periphery appropriate location of the light guide plate 400 of module backlight in the left and right sides has a depression breach 410, framework 500 inner edges are provided with a teat 510 corresponding to depression breach 410 places, by the engaging of teat 510 and depression breach 410, but make framework 500 lightguide plate fixings 400; Framework 500 is provided with a perforate 530 near teat 510, with the reduction proximity structure, form damping of shocks portion 520.Principle as the aforementioned, this damping of shocks portion 520 also has the impact endurance test shock of absorption energy, reaches the function of protection fluorescent tube and light guide plate 400.
The utility model is described in detail by above-mentioned preferred embodiment and accompanying drawing, but the specific embodiment that is disclosed is not used in restriction scope of the present utility model only in order to explanation the utility model.Scope of the present utility model is not exceeded with the foregoing description.All various variations of being done in the utility model spirit and application range, improvement all belong to scope of the present utility model.
Claims (10)
1. module backlight that is used for flat-panel screens comprises:
A light guide plate, the side periphery of at least one side of this light guide plate comprises at least one lug; And
A framework, the side inner edge of at least one side of this framework comprises at least one depression breach, this depression breach engages to fix this light guide plate mutually with the lug of this light guide plate, wherein be provided with at least one perforate at the framed structure place of contiguous this depression breach, this perforate and its proximity structure form a buffer structure portion.
2. module backlight as claimed in claim 1, wherein this lug can be circle, rectangle, triangle, trapezoidal or polygon.
3. module backlight as claimed in claim 1, wherein this depression breach can be circle, rectangle, triangle, trapezoidal or polygon.
4. module backlight as claimed in claim 1, wherein this perforate is a through hole.
5. module backlight as claimed in claim 1, wherein this perforate is a blind hole.
6. module backlight as claimed in claim 1, wherein this perforate can be circle, rectangle, triangle, trapezoidal or polygon.
7. module backlight as claimed in claim 1, wherein the junction of the periphery of this lug and this light guide plate is a fillet.
8. module backlight as claimed in claim 1, wherein the junction of the periphery of this lug and this light guide plate is a right angle.
9. module backlight as claimed in claim 1, wherein the periphery of this lug comprises a hypotenuse.
10. module backlight as claimed in claim 1, wherein the periphery of this depression breach comprises a hypotenuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420006467 CN2727786Y (en) | 2004-03-31 | 2004-03-31 | Backlight module with buffering design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420006467 CN2727786Y (en) | 2004-03-31 | 2004-03-31 | Backlight module with buffering design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2727786Y true CN2727786Y (en) | 2005-09-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420006467 Expired - Lifetime CN2727786Y (en) | 2004-03-31 | 2004-03-31 | Backlight module with buffering design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2727786Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386679C (en) * | 2004-03-31 | 2008-05-07 | 友达光电股份有限公司 | Buffering design back-light module group |
| CN102322600A (en) * | 2011-10-12 | 2012-01-18 | 深圳市华星光电技术有限公司 | A kind of module backlight and liquid crystal indicator |
| CN104613374A (en) * | 2014-12-22 | 2015-05-13 | 广州创维平面显示科技有限公司 | Backlight module and liquid crystal display device |
| CN106873211A (en) * | 2014-04-07 | 2017-06-20 | 瑞仪光电股份有限公司 | Optical assembly, backlight module and liquid crystal display |
-
2004
- 2004-03-31 CN CN 200420006467 patent/CN2727786Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386679C (en) * | 2004-03-31 | 2008-05-07 | 友达光电股份有限公司 | Buffering design back-light module group |
| CN102322600A (en) * | 2011-10-12 | 2012-01-18 | 深圳市华星光电技术有限公司 | A kind of module backlight and liquid crystal indicator |
| US8525949B2 (en) | 2011-10-12 | 2013-09-03 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Back light module and liquid crystal display device |
| CN106873211A (en) * | 2014-04-07 | 2017-06-20 | 瑞仪光电股份有限公司 | Optical assembly, backlight module and liquid crystal display |
| CN106873211B (en) * | 2014-04-07 | 2020-10-16 | 瑞仪光电股份有限公司 | Optical assembly, backlight module and liquid crystal display |
| CN104613374A (en) * | 2014-12-22 | 2015-05-13 | 广州创维平面显示科技有限公司 | Backlight module and liquid crystal display device |
| CN104613374B (en) * | 2014-12-22 | 2017-03-15 | 广州创维平面显示科技有限公司 | A kind of backlight module and liquid crystal indicator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YOUDA PHOTOELECTRIC CO., LTD. Free format text: FORMER OWNER: GUANGHUI ELECTRONIC CO., LTD. Effective date: 20080215 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080215 Address after: Postcode of Taiwan, Hsinchu, china: Patentee after: AU Optronics Corporation Address before: Taoyuan County, Taiwan province: Patentee before: Guanghui Electronic Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080507 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |