CN102086993B - Backlight module and liquid crystal display device using same - Google Patents
Backlight module and liquid crystal display device using same Download PDFInfo
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- CN102086993B CN102086993B CN2009103109310A CN200910310931A CN102086993B CN 102086993 B CN102086993 B CN 102086993B CN 2009103109310 A CN2009103109310 A CN 2009103109310A CN 200910310931 A CN200910310931 A CN 200910310931A CN 102086993 B CN102086993 B CN 102086993B
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- light source
- backlight module
- light
- guide plate
- shielding cover
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Abstract
The invention discloses a backlight module, comprising an optical film, a light guide plate, a light source and a light source shielding cover, wherein the light guide plate comprises a light exit face, a light incident face and a bottom face, the bottom face is arranged opposite to the light exit face, the light incident face and the bottom face are arranged adjacently, the optical film is arranged at one side of the light exit face, the light source is arranged at one side of the light incident face, the light guide plate, at one side of the light exit face adjacent to the light incident face, further comprises an inwards recessed accommodating part, the accommodating part accommodates a part of the light source shielding cover, and the edge of the optical film covers the edge of the light source shielding cover. According to the invention, under the situation of no increase of the thickness of the backlight module, the problem of light leakage caused by the gap between the light source shielding cover and the light source film module is effectively solved and the light exit uniformity of the backlight module is enhanced.
Description
Technical field
The present invention relates to a kind of backlight module and use the liquid crystal indicator of this backlight module.
Background technology
In recent years, liquid crystal indicator has occupied the main flow that shows product gradually because possessing frivolous, little, the advantage such as radiation is little that takes up room of volume.In liquid crystal indicator, liquid crystal panel itself is not luminous, but provides luminous uniform planar light by backlight module for it.
Backlight module generally includes optical diaphragm group, light guide plate, light source, light source reflecting housing.This light guide plate comprises an exiting surface and an incidence surface adjacent with this exiting surface.Light source reflecting housing is accommodated this light source and is placed light guide plate incidence surface one side, and the overlapping edges of light source reflecting housing is in light guide plate exiting surface edge.This optical diaphragm group is attached at exiting surface one side of this light guide plate.
The light that this light emitting diode sends is through after the propagation of this light guide plate, and most of light penetrates through the exiting surface of light guide plate.Light penetrates this backlight module through the repeatedly diffusion of this blooming piece and after converging, and then this backlight module can send uniform planar light.Yet, because each element material has certain tolerance in the backlight module when making, cause between the edge of this optical diaphragm group and the light source reflecting housing edge and leave certain gap, the light that is penetrated by the exiting surface of this light guide plate penetrates through this gap and through this optical diaphragm group light is spread and converge, can cause the gapped position bright dipping of this backlight module brighter, and then affect uniformity coefficient and the quality of the bright dipping of this backlight module.
Summary of the invention
In order to solve in the prior art because the light leak problem that the poor problem of worker causes is necessary to provide a kind of bright dipping more uniform backlight module.
Simultaneously, provide a kind of liquid crystal indicator of using above-mentioned backlight module.
A kind of backlight module, it comprises blooming piece, light guide plate, light source and light source shielding cover, this light guide plate comprises exiting surface, incidence surface and a bottom surface, this bottom surface and exiting surface are oppositely arranged, the adjacent setting with this bottom surface of this incidence surface, this blooming piece is arranged on this exiting surface one side, this light source is arranged on incidence surface one side, this light guide plate further comprises the resettlement section that caves inward in a side of the contiguous incidence surface of exiting surface, the light source mask is divided in this resettlement section, resettlement section, and the blooming piece edge hides the edge of this light source shielding cover.
A kind of liquid crystal indicator, it comprises a display panels and a backlight module, this display panels and the stacked setting of this backlight module, this a kind of backlight module comprises blooming piece, light guide plate, light source and light source shielding cover, this light guide plate comprises exiting surface, incidence surface and a bottom surface, this bottom surface and exiting surface are oppositely arranged, the adjacent setting with this bottom surface of this incidence surface, this blooming piece is arranged on this exiting surface one side, this light source is arranged on incidence surface one side, this light guide plate further comprises the resettlement section that caves inward in a side of the contiguous incidence surface of exiting surface, and the light source mask is divided in this resettlement section, resettlement section, and the blooming piece edge hides the edge of this light source shielding cover.
Compared with prior art, between incidence surface by the light guide plate in backlight module and the exiting surface resettlement section is set, the light source shielding cover is accommodated in this resettlement section, make light source shielding cover and blooming piece not at same plane, and blooming piece hides the edge of this light source shielding cover, make whole light of penetrating through this backlight module all through the converging and spread of optical diaphragm group, this backlight module and to use the liquid crystal indicator bright dipping of this backlight module even.
Description of drawings
Fig. 1 is the three-dimensional exploded view of liquid crystal indicator the first embodiment of the present invention.
Fig. 2 is that liquid crystal indicator shown in Figure 1 is partly assembled synoptic diagram.
Fig. 3 is the diagrammatic cross-section along the III-III place shown in Figure 2.
Fig. 4 is the three-dimensional exploded view of liquid crystal indicator the second embodiment of the present invention.
Fig. 5 is that liquid crystal indicator shown in Figure 4 is partly assembled synoptic diagram.
Fig. 6 is the diagrammatic cross-section along the VI-VI place shown in Figure 5.
The main element symbol description
Liquid crystal indicator: 100
Display panels: 1
Shading rubber belt: 3
Backlight module: 4
Optical diaphragm group: 41
Light source group: 42,72
Glue frame: 43,73
Light guide plate: 44,74
Reflector plate: 45,75
Pointolite: 421,721
Flexible printed wiring board: 422,722
Bottom surface: 441,741
Incidence surface: 442,742
Exiting surface: 443
Loading end: 444,744
Joint face: 445
Extension: 452,752
The first connecting portion: 4521
Light source arranges section: 4522
Light source shielding cover: 4523
Through hole: 731
Double sticky tape: 82
Embodiment
See also Fig. 1 to Fig. 3, Fig. 1 is the three-dimensional exploded view of liquid crystal indicator the first embodiment of the present invention, and Fig. 2 is that liquid crystal indicator shown in Figure 1 is partly assembled synoptic diagram, and Fig. 3 is the diagrammatic cross-section along the III-III place shown in Figure 2.
This backlight module 4 comprises glue frame 43, light guide plate 44 and the reflector plate 45 of optical diaphragm group 41, light source group 42, hollow.This glue frame 43 comprises four sidewalls (not indicating) that join end to end and connect.This light source 42 comprises two pointolites 421 and a bar shaped flexible printed wiring board 422, and it is luminous that flexible printed wiring board 422 is used for driving light source 421.This two pointolite 421 is arranged on this bar shaped flexible printed wiring board 422, and it is preferably LED source.Also can adopt other light source as required, the quantity of light source also can adopt one or more as required.This pointolite 421 comprises the light-emitting area (not indicating) of parallel this flexible printed wiring board 422, and light-emitting area is the height of pointolite 421 to the distance of printed circuit board (PCB) 422, and this light-emitting area is roughly rectangle, and it comprises the two relative long limit minor faces relative with two.
This light guide plate 44 comprises a bottom surface 441, an incidence surface 442 adjacent with this bottom surface 441 and an exiting surface 443 relative with bottom surface 441.The area of the viewing area of the area of this exiting surface 443 and this display panels 1 is complementary.This light guide plate 44 forms a resettlement section (not indicating) in a side direction sunken inside of exiting surface 443 contiguous incidence surfaces.Preferably, this resettlement section comprises the joint face 445 of loading end 444 and vertical this loading end 444.This loading end 444 is vertical and adjacent with this incidence surface 442, and this joint face 445 is vertical adjacent and parallel with this incidence surface 442 with this loading end 444.This incidence surface 442, loading end 444, joint face 445 and this exiting surface 443 sequentially are connected to form the secondary step structure.The thickness of the height of this joint face 445 and this reflector plate 45 is identical or a little more than the thickness of this reflector plate 45.The width of this incidence surface 442 height and the light-emitting area of this light source 421 is identical or a little more than the width of the light-emitting area of this light source 421.This incidence surface 442 highly equals the thickness of this light guide plate 44 with the height sum of this joint face 445, namely identical to the distance of exiting surface 443 with the bottom surface 441 of this light guide plate 44.This light guide plate 44 adopts the resin material manufacturing of high permeability usually.This loading end 444 has light diffusion function, and it can be realized by the mode that macromolecular compound material diffusion particle is set at this loading end 444, perhaps changes the flatness of loading end 444 by the modes such as microstructure are set at loading end 444.
This optical diaphragm group 41 comprises the optical elements such as diffusion sheet and prismatic lens.Diffusion sheet and prismatic lens stack gradually on the exiting surface 443 of light guide plate 44.Thereby, through the light of exiting surface 443 outgoing through repeatedly converge through diffusion sheet and prismatic lens successively with spread after this backlight module 4 of ejaculation, make the light that sends of this backlight module 4 more even.The length of this optical diaphragm group 41 is greater than the length of the exiting surface 443 of this light guide plate 44, and this grows at least loading end 444 of this light guide plate of cover part of part.
This reflector plate 45 comprises a main body (not indicating) and an extension 452.This reflector plate 45 is longer than the length of the bottom surface 441 of this light guide plate 44, to form this extension 452 growing part.The flexible printed wiring board 422 of this light source 42 is arranged on this extension 452, so that this light source 42 is fixed on this reflector plate 45.The extension 452 of this reflector plate 45 comprises that three one first connecting portion 4521, light sources that arrange continuously arrange section 4522 and a light source shielding cover 4523.The first connecting portion 4521 is connected with the main body of this reflector plate 45.The width of this first connecting portion 4521 (this first connecting portion 4521 arranges the common edge of section 4522 to the distance of the first connecting portion 4521 with the common edge of main body with light source) is greater than the thickness sum of height He this flexible printed wiring board 422 of this pointolite 421.This light source arranges section's 4522 areas and is equal to or greater than flexible printed wiring board 422 areas.(light source shielding cover 4523 arrives the distance of the another side relative with this common edge greater than the width of this first connecting portion 4521 with the common edge that light source arranges section 4522 to the width of this light source shielding cover 4523.
During assembling, the bottom surface 441 of this light guide plate 44 is arranged on the main body of this reflector plate 45; The extension 452 of this reflector plate 45 to 44 bendings of this light guide plate and partial coverage on the resettlement section of light guide plate 44.Wherein, this light source arranges relative this first connecting portions bending of section 4522 and is oppositely arranged with the incidence surface 442 of light guide plate 44, and light source 421 arranges between the incidence surface 442 of section 4522 and light guide plate 44 at this light source.These light source shielding cover 4523 relative these light sources arrange the resettlement section that section 4522 bending and these light source shielding cover 4523 parts are overlapped in this light guide plate 44, namely on this loading end 444.Light source arranges section 4522 over against the incidence surface 442 of this light guide plate 44, and this light source 42 is contained in this first connecting portion 4521, light source arranges in the receiving space of section 4522, light source shielding cover 4523 and light guide plate 44 incidence surfaces 442 compositions.This pointolite 421 is over against the incidence surface 442 of this light guide plate 44, and the light that this pointolite 421 sends directly enters this light guide plate 44 inside.This optical diaphragm group 41 is arranged at a side of the exiting surface 443 of this light guide plate 44.This optical diaphragm group 41 grow light source shielding cover 4523 edges that part hides this reflector plate 45, thereby since the poor space that causes of design worker covered by this optical diaphragm group 41.This glue frame 43 is accommodated this optical diaphragm group 41, light source group 42, light guide plate 44 and reflector plate 45, and then finishes the assembling of this backlight module 4.
By the light that this pointolite 421 sends, by the incidence surface 442 of this light guide plate 44, to propagate in the inside of this light guide plate 44, most of light penetrates through the exiting surface 443 of light guide plate 44; In these light guide plate 44 interior propagation, finally the exiting surface 443 via this light guide plate 44 penetrates after the reflection of this reflector plate 45 of another part light process; The light that is penetrated by this loading end 444 is divided into two parts, and the light source shielding cover 4523 by this reflector plate 45 behind part process diffusion particle or the diffusingsurface is reflected back this light guide plate 44, continues in these light guide plate 44 interior propagation; Another part penetrates this backlight module 4 by through this optical diaphragm group 41 of directive behind diffusion particle or the diffusingsurface after the process optical transition of this optical diaphragm group 41.
Therefore, between the incidence surface 442 of light guide plate 44 and exiting surface 443, the light source shielding cover 4523 that this reflector plate is accommodated in the resettlement section is set, the light source shielding cover 4523 that makes this reflector plate and this blooming piece 41 and make this blooming piece 41 prolong the edge of the light source shielding cover 4523 that hides these reflector plates 45 not on same.Light is spilt in the space of the joint face 445 of this light guide plate 44 by the edge of the light source shielding cover 4523 of this reflector plate 45, through the diffusion of this blooming piece 41 with converge after penetrate, and can not form in the part bright line, promoted the outgoing light homogeneity of this backlight module 4, and because the light source shielding cover 4523 of this reflector plate and this blooming piece 41 not on same, promote the outgoing light homogeneity of this backlight module 4 in the situation that does not increase module thickness.
See also Fig. 4 to Fig. 6, Fig. 4 is the three-dimensional exploded view of liquid crystal indicator the second embodiment of the present invention, and Fig. 5 is that liquid crystal indicator shown in Figure 4 is partly assembled synoptic diagram, and Fig. 6 is the diagrammatic cross-section along the VI-VI place shown in Figure 5.The difference of present embodiment and the first embodiment is: the one sidewall of glue frame 73 arranges a strip through-hole 731.The flexible printed wiring board 722 of light source group 72 can freely pass through in this strip through-hole 731, and this flexible printed wiring board 722 serves as the light source shielding cover simultaneously.Pointolite 721 is side-lighting type light-emitting.The extension 752 bent light tube reflection covers that serve as of reflector plate 75 are accommodated this pointolite 721 with incidence surface 742 and the flexible printed wiring board 722 of light guide plate 74.
During assembling, this flexible printed wiring board 722 extends this glue frame 73 by the inboard of this glue frame 73 by this strip through-hole 731 and is electrically connected with external circuit; Loading end 744 contiguous these flexible printed wiring boards 722 of light guide plate 74 arrange, and with loading end 744 overlapping places one two-sided adhesive tape 82 are set at flexible printed wiring board 722, and then fix this light source group 72, and incidence surface 742 neighbor point light sources 721 arrange; The bottom surface 741 of these reflector plate 75 contiguous these light guide plate 74 arranges, and the bottom surface 741 of light guide plate 74 is invested on the zone of these reflector plate 75 extensionless 752; The extension 752 of this reflector plate 75 is to the incidence surface 742 directions bending of this light guide plate 74, then this flexible printed wiring board 722, incidence surface 742, reflector plate 75 and extension 752 form a receiving space and accommodate this pointolite 721, and the light that pointolite 721 is sent directly enters this light guide plate 74.
The present invention more has other embodiments, be strip source such as light source, flexible printed wiring board is light tube reflection cover, light source is the bar shaped fluorescent tube for another example, utilize xsect for the light tube reflection cover parcel of the metal of U-shaped and fix this bar shaped fluorescent tube, a sidewall of this light tube reflection cover replaces the light source shielding cover of the reflector plate in the first embodiment to serve as light source shielding cover etc.
Claims (8)
1. backlight module, it comprises blooming piece, light guide plate, light source and light source shielding cover, this light guide plate comprises exiting surface, incidence surface and a bottom surface, this bottom surface and exiting surface are oppositely arranged, the adjacent setting with this bottom surface of this incidence surface, this blooming piece is arranged on this exiting surface one side, this light source is arranged on incidence surface one side, it is characterized in that: this light guide plate further comprises the resettlement section that caves inward in a side of the contiguous incidence surface of exiting surface, this resettlement section comprises loading end and joint face, loading end is vertical with joint face, incidence surface is vertical with loading end, and incidence surface is parallel with joint face, this incidence surface, loading end, joint face and this exiting surface sequentially form the secondary step structure, this light source shielding cover partly is overlapped on the loading end of this resettlement section, and the blooming piece edge hides the edge of this light source shielding cover and is not in contact with one another.
2. backlight module as claimed in claim 1, it is characterized in that: loading end has light diffusion function.
3. backlight module as claimed in claim 1, it is characterized in that: the height of this joint face is higher than the thickness of light source shielding cover.
4. backlight module as claimed in claim 1, it is characterized in that: this light source shielding cover is light source reflecting housing, this light source reflecting housing and this incidence surface define a receiving space and accommodate this light source.
5. backlight module as claimed in claim 1, it is characterized in that: this light source shielding cover is circuit board, and this light source is arranged on this circuit board.
6. backlight module as claimed in claim 5, it is characterized in that: this backlight module further comprises blooming piece, light guide plate, light source, circuit board and the light source shielding cover of a glue frame to accommodate this backlight module, this glue frame comprises four sidewalls that sequentially connect, wherein a sidewall is to incidence surface that should light guide plate, this sidewall comprises a strip through-hole, and this circuit board is connected with external circuit by this through hole.
7. backlight module as claimed in claim 1, it is characterized in that: this backlight module further comprises a reflector plate, this reflector plate comprises a main body and an extension, contiguous this reflector plate main body in this bottom surface arranges, this extension overlapping edges is on this loading end, so that this extension replaces light source shielding cover, and this extension and this incidence surface define a receiving space and accommodate this light source.
8. liquid crystal indicator, it comprises a display panels and a backlight module, this display panels and the stacked setting of this backlight module, this backlight module is such as the arbitrary backlight module in the claim 1-7 item.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103109310A CN102086993B (en) | 2009-12-04 | 2009-12-04 | Backlight module and liquid crystal display device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103109310A CN102086993B (en) | 2009-12-04 | 2009-12-04 | Backlight module and liquid crystal display device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102086993A CN102086993A (en) | 2011-06-08 |
| CN102086993B true CN102086993B (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103109310A Expired - Fee Related CN102086993B (en) | 2009-12-04 | 2009-12-04 | Backlight module and liquid crystal display device using same |
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| Country | Link |
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| CN (1) | CN102086993B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105911633A (en) * | 2016-05-23 | 2016-08-31 | 京东方科技集团股份有限公司 | Light guide plate, die thereof, making method, backlight module and display device |
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| US9074740B2 (en) * | 2011-07-01 | 2015-07-07 | Innolux Corporation | Backlight structure and display module using the same |
| CN103574390A (en) * | 2012-07-26 | 2014-02-12 | 苏州璨宇光学有限公司 | Backlight module |
| CN102980102B (en) * | 2012-11-28 | 2014-12-24 | 京东方科技集团股份有限公司 | Backlight module and display device |
| TWI544241B (en) | 2013-10-24 | 2016-08-01 | 元太科技工業股份有限公司 | Display device |
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| TWI595295B (en) * | 2016-09-30 | 2017-08-11 | 友達光電股份有限公司 | Display device |
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| CN106898274A (en) * | 2017-03-06 | 2017-06-27 | 高彩红 | Liquid crystal display device |
| CN110095835A (en) * | 2018-01-31 | 2019-08-06 | 广东欧珀移动通信有限公司 | A kind of backlight module and electronic device |
| CN108458280B (en) * | 2018-02-23 | 2021-01-29 | 重庆京东方光电科技有限公司 | Backlight assembly, assembling method thereof and display device |
| CN110764312B (en) * | 2019-11-13 | 2022-02-22 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN211123566U (en) * | 2020-01-20 | 2020-07-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
| TWI822134B (en) | 2022-06-22 | 2023-11-11 | 群光電能科技股份有限公司 | Backlight module |
| CN115373180A (en) * | 2022-08-26 | 2022-11-22 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| Publication number | Publication date |
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| CN102086993A (en) | 2011-06-08 |
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Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: INNOLUX DISPLAY CO., LTD. Effective date: 20120228 |
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Effective date of registration: 20120228 Address after: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant after: Chimei Optoelectronics Co., Ltd. Address before: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant before: Innolux Display Group |
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