CN1786792A - Large size back light module - Google Patents
Large size back light module Download PDFInfo
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- CN1786792A CN1786792A CNA2004101006054A CN200410100605A CN1786792A CN 1786792 A CN1786792 A CN 1786792A CN A2004101006054 A CNA2004101006054 A CN A2004101006054A CN 200410100605 A CN200410100605 A CN 200410100605A CN 1786792 A CN1786792 A CN 1786792A
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- guide plate
- light guide
- backlight module
- small size
- light
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Abstract
The invention relates to a large size backlight module that uses plural small size backlight module units connecting with the light guiding board. The invention is easy to make a large size backlight module and could be used for the liquid panel.
Description
[technical field]
The invention relates to a kind of large size back light module, particularly, constitute a large size back light module through splicing about utilizing several to be the small size backlight module unit of small size.
[background technology]
It shows that required light source need be very powerful known LCD TV (LCD TV), can provide the direct type backlight module of luminous energy greatly so need rely upon one.
And as shown in Figure 1, this direct type backlight module 1 has a box body 11, box body 11 inside surfaces then are coated with or are covered with reflecting material 111, and in box body 11, be arranged at intervals with most cold cathode fluorescent lamp (CCFL) 12, be provided with a diffuser plate 13 in place, cold cathode fluorescent lamp 12 tops again, be covered with prismatic lens 14 again in diffuser plate 13 tops at last.
As shown in Figure 2, wherein cold cathode fluorescent lamp 12 energising and when luminous, the light part that these light sources send is directly to inject towards diffuser plate 13, another part then can be injected towards diffuser plate 13 after reflecting material 111 reflections through box body 11 inside surfaces again; Behind the light that diffuser plate 13 is accepted from cold cathode fluorescent lamp 12, even these light obtain the homogenize effect, and by the ejaculation of diffuser plate 13 tops, and, its light is concentrated by prismatic lens 14 light harvestings, and exportable feed flow crystal panel is utilized (not drawing) herein.
In the above-mentioned direct type backlight module 1, because of each cold cathode fluorescent lamp 12 is located under the diffuser plate 13, when in case cold cathode fluorescent lamp 12 is subjected to electroluminescence, diffuser plate 13 is positioned at the correspondence position directly over the cold cathode fluorescent lamp 12, promptly can obtain maximum light, remaining part then can obtain less light, makes the output performance of this light be a bright dark alternate situation, the utilization of very unfavorable liquid crystal panel eventually.
For this reason, many relevant dealers develop then at design that overcomes the problems referred to above such as TaiWan, China patent: No. 91116114, No. 92107006, No. 92109025, and No. 92116305 etc.
Wherein, No. 91116114, as shown in Figure 3, mainly be to establish a transparent panel A with a plurality of grooves in diffuser plate 13 belows, the light that makes cold cathode fluorescent lamp 12 is behind a plurality of grooves of transparent panel A, and produce the purpose that scattering reaches the light diffusion, reduce the bright dark alternate obvious degree of overall light, and help this backlight module 1 homogenising bright dipping performance.
No. 92107006, as shown in Figure 4, then be that upper surface in cold cathode fluorescent lamp 12 adds a reflection horizon B, in order to the light of shaded portions from this upper surface ejaculation, so that this light obtains reflection, and reach minimizing by cold cathode fluorescent lamp 2 direct projections in directly over the light of diffuser plate 13 positions, reducing the bright dark alternate obvious degree of overall light, and help the performance of this backlight module 1 homogenising bright dipping.
No. 92109025, as shown in Figure 5, then in diffuser plate 13, being added with diffusion particle C, and in the wavy curved arc face of diffuser plate 13 inboard formation, it is in forming the thickest thick portion with cold cathode fluorescent lamp 12 straight line corresponding positions, makes the light of cold cathode fluorescent lamp 12 can be via this thickness, and more diffusion particle C is so reach the higher diffusivity of light source in this thick, to reduce the bright dark alternate obvious degree of overall light, help the performance of backlight module 1 homogenising bright dipping.
No. 92116305, as shown in Figure 6, then be the transflective film D that is respectively equipped with a may command light transmittance in diffuser plate 13 in the position of corresponding each cold cathode fluorescent lamp 12, make of the effect of the light of cold cathode fluorescent lamp 12 by this transflective film D, make the direct transmission of light portion and enter in the diffuser plate 13, part light then is the bottom surface that reflex action is incident upon box body 11 in addition, again after the reflection again of box body 11 bottom surfaces, the side injects towards diffuser plate 13 other non-cold cathode fluorescent lamp 12 correspondence positions, reduce the bright dark alternate obvious degree of overall light to reach, help the performance of backlight module 1 homogenising bright dipping.
In the aforementioned various design, no matter estimate and how light that it is reached evenly spreads usefulness, wherein, diffuser plate 13 in this backlight module 1 is an indispensable element, and the size design of trend maximization more along with LCD TV, the size of this diffuser plate 13 also strengthen thereupon, and mostly being the acryl material of an optical grade, the material of diffuser plate 13 becomes, large-sized more diffuser plate 13 is wayward more its precision on it is made, flatness and internal stress phenomenon or the like problem, and large-sized more area, naturally need big more thickness, also be unfavorable for the requirement that product is lightening.
Again; cold cathode fluorescent lamp 12 is the tubular body that glass material became of a genus hard; its diameter is on about 2mm; long more size is difficult for making more; and the finished product of long more size is not easy to carrying more; regular meeting occurs after assembling because of colliding the situation that promptly fractures; so; in the direct type backlight module 1 that this LCD TV is utilized; as shown in Figure 7; being provided with all to be with vertical type mostly of these cold cathode fluorescent lamp 12 arranged; and to two sides amplifications quantity mode for it, promptly be to be benchmark with the length of single cold cathode fluorescent lamp 12 as the wide height of this backlight module 1, and look two side length differences of this backlight module 1; increased and be filled up to necessary Board Lot, constituted cold cathode fluorescent lamp 12 quantity that satisfy backlight module 1 required total light source then.So, though a greater number of cold cathode fluorescent lamp 12 can to(for) two side length of backlight module 1 rearranges and is satisfied, but, wide requirement for height for backlight module 1, then mainly need be decided by the length performance that 12 of single cold cathode fluorescent lamp can be reached, the length that is cold cathode fluorescent lamp 12 is under preceding topic that can not be oversize, and it can finish backlight module 1 area that construction goes out, and nature can be subjected to the restriction of suitable condition.
Therefore, at present backlight module 1 enlarges the performance requirement of its size for desire, all is limited by diffuser plate 13 and is the success ratio that large tracts of land is made, and within the safe length scope that can reach of 12 of cold cathode fluorescent lamp, causes then to be difficult for the awkward situation made.
[summary of the invention]
The object of the present invention is to provide a kind of large size back light module, by designing in advance with desiring to reach large-sized backlight module, cut apart and be formulated for a plurality of small size backlight module units that are the small size scale, after again each small size backlight module unit assembly group being linked, so that large size back light module relatively is easy to make.
Of the present invention time a purpose is to provide a kind of large size back light module, by means of linking the large size back light module of formation through the assembly group with a plurality of small size backlight module units that are; Because of in each small size backlight module unit than the light guide plate of small size, and short cold cathode fluorescent lamp all more easily make, and help finishing of large size back light module.
In order to achieve the above object, the invention provides a kind of large size back light module, it is characterized in that: it is the small size backlight module unit that is small size by a plurality of, splices be combined into mutually via each light guide plate in this each small size backlight module unit.
Described large size back light module is characterized in that: the incidence surface of light guide plate connection exiting surface place is provided with clinch in this small size backlight module unit, overlaps mutually with this clinch with the bottom face that makes another light guide plate of desiring to be connected.
Described large size back light module, it is characterized in that: light guide plate has two all sides in this each small size backlight module unit, wherein all sides are formed with a recess, another all side then forms a protuberance, so that two light guide plate of desiring to be connected embed combination mutually with its protuberance and the mutual correspondence of recess respectively.
Described large size back light module, it is characterized in that: light guide plate has two all sides in this each small size backlight module unit, single all sides are formed with recess and protuberance simultaneously, and with the protuberance and the corresponding combination of recess of adjacent all sides of another light guide plate of desiring to be connected.
Described large size back light module is characterized in that: after this each small size backlight module unit splicing, the circumferential lateral surface that is positioned at the outer most edge light guide plate is one smooth planar.
Described large size back light module is characterized in that: two lateral circle surfaces of light guide plate are smooth shape in this small size backlight module unit.
Described large size back light module is characterized in that: the exiting surface in each zone that links to each other of light guide plate adds diffuser plate in this each small size backlight module unit.
Described large size back light module is characterized in that: in covering with large-area diffuser plate on the exiting surface of spliced each light guide plate, and be covered on this diffuser plate with large-area prismatic lens.
The present invention utilizes several undersized backlight module units than small size, after splicing, can be made into a large size back light module, in other words, large size back light module can be divided into that several are equal through advance planning, or the small size backlight module unit of comparable size not, after linking, the assembly group can obtain the large size back light module of preset area; And utilize each element in the small size backlight module unit be small size, as than the small size light guide plate, and short cold cathode fluorescent lamp etc. is because of more for it under the situation, can finish the formation of a large size back light module easily, and, can utilize for follow-up liquid crystal panel through controlling the consistance of each small size backlight module unit output light.
[description of drawings]
Fig. 1 is known directly-down backlight module structure synoptic diagram.
Fig. 2 is the light motion synoptic diagram of Fig. 1.
Fig. 3 is No. 91116114 patent synoptic diagram of TaiWan, China.
Fig. 4 is No. 92107006 patent synoptic diagram of TaiWan, China.
Fig. 5 is No. 92109025 patent synoptic diagram of TaiWan, China.
Fig. 6 is No. 92116305 patent synoptic diagram of TaiWan, China.
Fig. 7 is that cold cathode fluorescent lamp is arranged synoptic diagram in the known direct type backlight module.
Fig. 8 is a synoptic diagram of the present invention.
Fig. 9 is the upright synoptic diagram of small-medium size backlight module unit group of the present invention.
Figure 10 is that small-medium size backlight module unit of the present invention and group link synoptic diagram.
Figure 11 is that small-medium size backlight module unit of the present invention and group link synoptic diagram.
Figure 12 is the embodiment that small-medium size backlight module unit of the present invention another and group link.
Figure 13 is an Application Example of the present invention.
Figure 14 is further application of the invention embodiment.
[embodiment]
Be the effect that can be easier to understand structure of the present invention and can reach, please conjunction with figs. illustrate as the back now:
At first, see also shown in Figure 8, the composition of large size back light module 2 of the present invention, it mainly is large size back light module 2 scales of reaching in default, be partitioned into into the small size backlight module unit 3 of a plurality of small size scales, after with each small size backlight module unit 3 and group binding, to constitute default large size back light module 2.
Inferiorly see also shown in Figure 9ly, wherein, each small size backlight module unit 3 has a light guide plate 31, one cold cathode fluorescent lamp 32, a reflecting plate 33 and diffuser plate 34 and prismatic lens 35; 31 tools of light guide plate, one exiting surface 311, a reflecting surface 312, an incidence surface 313, a bottom face 314 and two all sides 315; Reflecting surface 312 can have the leaded light point 3121 that changes direct of travel in order to guiding light, 313 of incidence surfaces are formed with clinch 3131 in connecting exiting surface 311 places, form a recess 3151 in all sides 315 wherein in two all sides 315, and 315 of another all sides form a protuberance 3152, cold cathode fluorescent lamp 32 is incidence surface 313 outsides that are disposed at light guide plate 31, and give large-area coating with a lamp reflector 321, with to incidence surface 313 input light, and towards light guide plate 31 internal delivery; 33 of reflecting plates are covered on reflecting surface 312 outside surfaces of light guide plate 31, in order to light is done reflection, towards the bright dipping of advancing of exiting surface 311 directions; Diffuser plate 34 is exiting surface 311 outside surfaces that are covered on light guide plate 31, does the function of even diffusion in order to the light that will leave light guide plate 31; Again, 35 tops of being located at diffuser plate 34 of prismatic lens can be with the light of light guide plate 31 via diffuser plate 34 outputs, and further light harvesting is to strengthen the performance of bright dipping briliancy.
As shown in figure 10, when each small size backlight module unit 3 and group link, the clinch 3131 of incidence surface 313 just can be set for the bottom face 314 of another light guide plate 31 in each light guide plate 31, and the solid that imposes the transparency strengthened fixing, and reaches the binding of this direction.
Again as shown in figure 11, each has the design of recess 3151 with the protuberance 3152 of formation mutually to utilize in each light guide plate 31 two all sides 315, make two adjacent light guide plate 31 respectively utilize its recess 3151 and protuberance 3152 to embed combination mutually, and the solid that imposes the transparency strengthened fixing, and finishes the binding of other direction.And many light guide plate 31 are spliced and combined, and be expanded to the default total area of whole backlight module.
Certainly, after each backlight module unit 3 assembly groups link, be positioned at the circumferential lateral surface 315 of outer most edge light guide plate 31, because of not needing to do again binding, and can form one smooth planar.
Moreover, as shown in figure 12, also can be in all sides 315 of light guide plate 31, promptly be formed with recess 3151 and protuberance 3152 simultaneously, in another light guide plate 31 that desire links, recess 3151 and 3152 of protuberances in its adjacent all side 315 are corresponding each other cooperation, can reach two light guide plate 31 equally and link used mutually.
Again, each backlight module unit 3 can determine its size according to planning and design, so, if through its backlight module unit 3 of planning and design be one quite dwindle size the time, the area of its each light guide plate 31 also can contract to suitable little, and for small size light guide plate 31 because of being thinner, and weight is lighter, organize when linking and piece together, its two all side 315 even can be all smooth planarly and directly is coated with all side 315 of solid in its light guide plate 31, makes two adjacent light guide plate 31 directly bind and connects.
For another shown in Figure 13, for making light output the time not be subjected to the influence of each light guide plate 31 connection, in each light guide plate 31 linked to each other the zone, its exiting surface 311 outer diffuser plates 34 that can add a greater number obtained better even diffusion effect with order via these regional light.
And for example shown in Figure 14, in the application of the present invention, can be large-area diffuser plate 34 be covered on through and group after the exiting surface 311 of each light guide plate 31 on, and contain simultaneously on the exiting surface 311 of each light guide plate 31; Also can be covered on this diffuser plate 34 with individual large-area prismatic lens 35 again, evenly spread, and realize light harvesting usefulness to make light.
The present invention utilizes a plurality of undersized backlight module units 3 than small size, the area that can finish a large size back light module 2 after the assembly group is required, in other words, large size back light module 2 can be divided into a plurality of equal through advance planning, or the small size backlight module unit 3 of comparable size not, after linking, the assembly group can obtain the large size back light module 2 of preset area; And utilize each element in the small size backlight module unit 3 be small size, as than small size light guide plate 31, and short cold cathode fluorescent lamp 32 grades are because of more for it under the situation, can finish the formation of a large size back light module 2 easily, and, can utilize for follow-up liquid crystal panel through controlling the consistance of each small size backlight module unit 3 output light.
Claims (8)
1, a kind of large size back light module is characterized in that: it is the small size backlight module unit that is small size by a plurality of, splices be combined into mutually via each light guide plate in this each small size backlight module unit.
2, large size back light module as claimed in claim 1 is characterized in that: the incidence surface of light guide plate connection exiting surface place is provided with clinch in this small size backlight module unit, overlaps mutually with this clinch with the bottom face that makes another light guide plate of desiring to be connected.
3, large size back light module as claimed in claim 1, it is characterized in that: light guide plate has two all sides in this each small size backlight module unit, wherein all sides are formed with a recess, another all side then forms a protuberance, so that two light guide plate of desiring to be connected embed combination mutually with its protuberance and the mutual correspondence of recess respectively.
4, large size back light module as claimed in claim 1, it is characterized in that: light guide plate has two all sides in this each small size backlight module unit, single all sides are formed with recess and protuberance simultaneously, and with the protuberance and the corresponding combination of recess of adjacent all sides of another light guide plate of desiring to be connected.
5, as claim 3 or 4 described large size back light modules, it is characterized in that: after this each small size backlight module unit splicing, the circumferential lateral surface that is positioned at the outer most edge light guide plate is one smooth planar.
6, large size back light module as claimed in claim 1 is characterized in that: two lateral circle surfaces of light guide plate are smooth shape in this small size backlight module unit.
7, large size back light module as claimed in claim 1 is characterized in that: the exiting surface in each zone that links to each other of light guide plate adds diffuser plate in this each small size backlight module unit.
8, large size back light module as claimed in claim 1 is characterized in that: in covering with large-area diffuser plate on the exiting surface of spliced each light guide plate, and be covered on this diffuser plate with large-area prismatic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101006054A CN100371793C (en) | 2004-12-09 | 2004-12-09 | Large size back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101006054A CN100371793C (en) | 2004-12-09 | 2004-12-09 | Large size back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1786792A true CN1786792A (en) | 2006-06-14 |
| CN100371793C CN100371793C (en) | 2008-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101006054A Expired - Fee Related CN100371793C (en) | 2004-12-09 | 2004-12-09 | Large size back light module |
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| CN (1) | CN100371793C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101886778A (en) * | 2010-07-27 | 2010-11-17 | 苏州向隆塑胶有限公司 | Backlight module and liquid crystal display device |
| CN101994955A (en) * | 2009-08-11 | 2011-03-30 | 索尼公司 | Planar illumination device |
| CN101660689B (en) * | 2008-08-25 | 2011-07-27 | 乐金显示有限公司 | Backlight unit and liquid crystal display device having the same |
| CN101650492B (en) * | 2008-08-15 | 2011-12-07 | 北京京东方光电科技有限公司 | Light guide plate mould plate and method for manufacturing same |
| WO2012075673A1 (en) * | 2010-12-08 | 2012-06-14 | 深圳安嵘光电产品有限公司 | Puzzle type light guide panel and method for making the same |
| CN102566139A (en) * | 2010-12-28 | 2012-07-11 | 歌尔声学股份有限公司 | LED (Light-Emitting Diode) backlight display equipment |
| US8223296B2 (en) | 2008-08-25 | 2012-07-17 | Lg Display Co. Ltd. | Backlight unit and liquid crystal display device having the same |
| WO2013004058A1 (en) * | 2011-07-06 | 2013-01-10 | 深圳市华星光电技术有限公司 | Light guide plate and backlight display module |
| TWI420164B (en) * | 2009-11-26 | 2013-12-21 | Global Lighting Technologies | Light guiding assembly and the back light module using the same |
| CN104864311A (en) * | 2015-05-06 | 2015-08-26 | 广州创维平面显示科技有限公司 | Liquid crystal display device and downright and side entry hybrid backlight module |
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| CN101749562B (en) * | 2008-12-05 | 2011-08-17 | 上海向隆电子科技有限公司 | Structure for eliminating bright lines of splice type backlight module |
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| CN2580452Y (en) * | 2002-11-08 | 2003-10-15 | 鸿富锦精密工业（深圳）有限公司 | Large size light conduction plate |
| CN1553257A (en) * | 2003-05-28 | 2004-12-08 | 友达光电股份有限公司 | Light negative module liquid-crystal displaying device |
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- 2004-12-09 CN CNB2004101006054A patent/CN100371793C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101650492B (en) * | 2008-08-15 | 2011-12-07 | 北京京东方光电科技有限公司 | Light guide plate mould plate and method for manufacturing same |
| US8189985B2 (en) | 2008-08-15 | 2012-05-29 | Beijing Boe Optoelectronics Technology Co., Ltd. | Light guide plate template and manufacturing method thereof |
| CN101660689B (en) * | 2008-08-25 | 2011-07-27 | 乐金显示有限公司 | Backlight unit and liquid crystal display device having the same |
| US8223296B2 (en) | 2008-08-25 | 2012-07-17 | Lg Display Co. Ltd. | Backlight unit and liquid crystal display device having the same |
| CN101994955A (en) * | 2009-08-11 | 2011-03-30 | 索尼公司 | Planar illumination device |
| TWI420164B (en) * | 2009-11-26 | 2013-12-21 | Global Lighting Technologies | Light guiding assembly and the back light module using the same |
| CN101886778A (en) * | 2010-07-27 | 2010-11-17 | 苏州向隆塑胶有限公司 | Backlight module and liquid crystal display device |
| WO2012075673A1 (en) * | 2010-12-08 | 2012-06-14 | 深圳安嵘光电产品有限公司 | Puzzle type light guide panel and method for making the same |
| CN102566139A (en) * | 2010-12-28 | 2012-07-11 | 歌尔声学股份有限公司 | LED (Light-Emitting Diode) backlight display equipment |
| WO2013004058A1 (en) * | 2011-07-06 | 2013-01-10 | 深圳市华星光电技术有限公司 | Light guide plate and backlight display module |
| CN104864311A (en) * | 2015-05-06 | 2015-08-26 | 广州创维平面显示科技有限公司 | Liquid crystal display device and downright and side entry hybrid backlight module |
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| Publication number | Publication date |
|---|---|
| CN100371793C (en) | 2008-02-27 |
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