CN100346214C - Backlight modular - Google Patents
Backlight modular Download PDFInfo
- Publication number
- CN100346214C CN100346214C CNB2004100334121A CN200410033412A CN100346214C CN 100346214 C CN100346214 C CN 100346214C CN B2004100334121 A CNB2004100334121 A CN B2004100334121A CN 200410033412 A CN200410033412 A CN 200410033412A CN 100346214 C CN100346214 C CN 100346214C
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- CN
- China
- Prior art keywords
- light
- backlight module
- guide plate
- light guide
- light emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009792 diffusion process Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 18
- 230000004308 accommodation Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- 230000001795 light effect Effects 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 229920000515 polycarbonate Polymers 0.000 description 4
- -1 acryl Chemical group 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- ONIHPYYWNBVMID-UHFFFAOYSA-N diethyl benzene-1,4-dicarboxylate Chemical compound CCOC(=O)C1=CC=C(C(=O)OCC)C=C1 ONIHPYYWNBVMID-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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Abstract
The present invention provides a back light module. A light mixing distance of light-emitting diodes in the back light module can be shortened. A light guide plate is arranged around the light-emitting diodes, light emitted by the light-emitting diodes can be uniformly mixed in a short distance, the defects of a traditional light mixing design can be avoided, and the size of the back light module is reduced. The back light module of the present invention comprises a frame, a circuit plate, a plurality of light-emitting diodes and a light guide plate, wherein a containing space is formed in the frame, and the circuit plate is arranged in the containing space; the light-emitting diodes are electrically connected with the circuit plate and are convexly arranged on the circuit plate; the light guide plate is arranged on the circuit plate, and is provided with at least one opening used for containing the light-emitting diodes.
Description
Technical field
The present invention relates to a kind of backlight module (backlight module), particularly relate to a kind of light mixing device of light mixing distance and backlight module of application thereof of shortening.
Background technology
(Light Emitting Diode is to be applied to LCD at present (liquid crystal display, LCD) one of main light source of the backlight module on belong to lower powered spontaneous light source LED) to light emitting diode.The glow color of light emitting diode includes ruddiness (R), green glow (G), blue light (B) and white light etc. at least.Wherein because the color saturation of white light emitting diode is not good, generally can adopt ruddiness, green glow, and color such as blue light carry out colour mixture, to obtain the preferred white light of colour mixture.In addition, because light emitting diode has that luminescent lifetime is long, volume is little and advantage such as power-saving, make light emitting diode be well suited for being made into arrayed elements, for example the array light source of being formed with R, G and B light emitting diode.
Please refer to Fig. 1, it illustrates is the part schematic perspective view of traditional LCD.In Fig. 1, LCD 100 comprises a backlight module 108 and a display panels 110 at least.Backlight module 108 comprises a circuit board 102, a plurality of light emitting diode 104 and diffusion sheet 106.These light emitting diodes 104 comprise a plurality of R, G and B light emitting diode, and formation an array formula light source is disposed on the circuit board 102.Diffusion sheet 106 is disposed at the top of these light emitting diodes 104, and the light source that provided of light emitting diode 104, as ruddiness, green glow and blue light, will be mixed into white light through after the diffusion of diffusion sheet 106, with directive display panels 110.
Yet this kind light mixing mechanism needs bigger light mixing distance, and promptly the distance between light emitting diode 104 and the diffusion sheet 106 wants enough big, can reach uniform mixed light effect.The volume potential of backlight module 108 must increase along with the elongated of light mixing distance, is against the basic demand of compact LCD today.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of backlight module exactly, light mixing distance in order to the light emitting diode in the middle of reducing, it is by a light guide plate being set around light emitting diode, make that the light of light emitting diode can be at short distance mixed light equably, break away from the yoke of traditional mixed light design, and then dwindle the volume of backlight module.
According to purpose of the present invention, a kind of backlight module is proposed, comprise a framework, a circuit board, a plurality of led of side view type and a light guide plate.Form an accommodation space in this framework, and circuit board is arranged at promptly in this accommodation space.These led of side view type are convexly set on the circuit board, and are electrically connected with circuit board.Light guide plate is arranged on the circuit board, and has at least one opening that runs through, and this runs through opening in order to ccontaining these light emitting diodes, and wherein, the light of these led of side view type will be incident in this light guide plate by this inwall that runs through opening.
According to another purpose of the present invention, a kind of light mixing device is proposed, this light mixing device comprises a circuit board, a plurality of light emitting diode and a light guide plate.Light emitting diode is electrically connected with circuit board, and is convexly set on the circuit board.Light guide plate is arranged on the circuit board, and has at least one opening, and this opening is in order to the ccontaining light emitting diode that is convexly set on the circuit board.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. elaborates.In the accompanying drawing:
It is the part schematic perspective view of traditional LCD that Fig. 1 illustrates.
Fig. 2 A is the vertical view that backlight module illustrated according to the first embodiment of the present invention.
Fig. 2 B is the sectional view that backlight module illustrated that the profile line 2B-2B ' in Fig. 2 A is looked.
Fig. 3 is the side view that backlight module illustrated according to the second embodiment of the present invention.
Fig. 4 is the schematic perspective view according to the distressed structure of diffusion structure of the present invention.
Fig. 5 is the vertical view that backlight module illustrated according to the third embodiment of the present invention.
Fig. 6 is the vertical view that backlight module illustrated according to the fourth embodiment of the present invention.
The simple symbol explanation
100: LCD
102,202: circuit board
104,204: light emitting diode
106: diffuser plate
108,200,300,500,600: backlight module
110: display panels
201: light mixing device
204a: light sources
206: reflecting material
206a: port
208,502,602,604,606: light guide plate
210: opening
212: framework
212a: accommodation space
302: diffusion structure
3021: diffusion is dull and stereotyped
3022: cylindrical diffsuin stack
3023: the convex diffsuin stack
3024: the spill diffsuin stack
3025: diffusing globe
304: optical thin film
504: groove
608: insert and put the space
Embodiment
First embodiment
Please refer to Fig. 2 A and Fig. 2 B, Fig. 2 A is the vertical view that backlight module illustrated according to the first embodiment of the present invention, and Fig. 2 B is the sectional view that backlight module illustrated that the profile line 2B-2B ' in Fig. 2 A is looked.
In addition, light mixing device 201 also comprises a reflecting material 206, and reflecting material 206 is disposed on the circuit board 202 in the mode of pasting or apply, and forms at least one port 206a, is convexly equipped with out reflecting material 206 for the light-emitting area of these light emitting diodes 204.In addition, also other reflecting material can be set on the inwall of the framework side plate in the framework 212, and the framework side plate tilts to have a predetermined angular.Such set-up mode makes the light that reflecting material reflected that applies or be pasted on the framework side plate be able to advance towards the top of light guide plate 208, and carries out mixed light once more with the light that penetrates from light guide plate 208.
Ruddiness, green glow or the blue light that light emitting diode 204 is provided is incident in the light guide plate 208 via the inwall of opening 210, then, the reflection action of collocation reflecting material 206, light guide plate 208 with these light equably mixed light become white light and be emitted to the top of light guide plate 208, shown in Fig. 2 B.Because light guide plate 208 can blend together white light with RGB, promptly Bu Fen mixed light process is finished in light guide plate 208, reduce light emitting diode 204 widely to the light mixing distance between the optical thin film (as diffuser plate) of its top, and dwindle the volume of backlight module, quite meet now LCD and move towards compact trend requirement.
Right those skilled in the art can understand that also technology of the present invention is not confined to this, for example, the material of light guide plate 208 can be acryl (Polymethyl Methacrylate, PMMA) or polycarbonate (Polycarbonate, PC).In addition, reflecting material 206 also has multiple set-up mode, for example be coated on reflection horizon on the circuit board 202, be coated on the reflection horizon under the light guide plate 208 or be disposed at circuit board 202 and light guide plate 208 between reflecting plate.Moreover reflecting material 206 also can be made up of several pieces reflecting plates and reach identical reflection function.The material of reflecting plate 206 can be the poly terephthalic acid diethylester (Polyethylene Terephthalate, PET).
Second embodiment
Please refer to Fig. 3, it illustrates is the side view that backlight module illustrated according to the second embodiment of the present invention.Backlight module 200 differences of the backlight module 300 of present embodiment and first embodiment are that backlight module 300 also comprises an at least one diffusion structure 302 and an optical thin film 304.Then continue to use same numeral as for other identical components, and do not repeat them here.
Optical thin film 304 is in order to receiving the light from the reflecting material on light guide plate 208 and framework 212 sidewalls, and further spreads and mixed light.Thus, under the situation of dwindling light mixing distance (being the distance between light emitting diode 204 and the optical thin film 304), carry out repeatedly mixed light, more can obtain better mixed light effect than traditional mixed light design.The material of diffusion structure 302 can be for example for acryl (PMMA) or polycarbonate (PC), and optical thin film 304 is selected from combination in any in the group that diffuser plate, prismatic lens and brightening piece form.Reflecting material also can have multiple set-up mode, for example is the metal level of one deck sputter, chemoreflex layer or several pieces reflecting plates that one deck applies.
Moreover as shown in Figure 4, diffusion structure 302 can have multiple shape, as spreads the structure that flat board 3021, cylindrical diffsuin stack 3022, convex diffsuin stack 3023, spill diffsuin stack 3024 and diffusing globe 3025 etc. can be brought into play impartial diffusion and mixed light effect.
The 3rd embodiment
Please refer to Fig. 5, it illustrates is the vertical view that backlight module illustrated according to the third embodiment of the present invention.In Fig. 5, backlight module 200 differences of the backlight module 500 of present embodiment and first embodiment are the shape of the opening 504 of light guide plate 502.
These light emitting diodes 204 form number line light source group, and as two line light source group 204a, the opening on the light guide plate 502 is several grooves, two grooves 504 as shown in Figure 5, and each groove 504 holds the light sources 204a of delegation.In addition, present embodiment also can be provided with a diffusion structure at least to seal these grooves 504, and this diffusion structure is positioned at the top of light sources 204a, and this diffusion structure can be the structure of arbitrary shape.
The 4th embodiment
Please refer to Fig. 6, it illustrates is the vertical view that backlight module illustrated according to the fourth embodiment of the present invention.In Fig. 6, backlight module 500 differences of the backlight module 600 of present embodiment and the 3rd embodiment are not only one of light guide plate, and other identical components is then continued to use same numeral, and does not repeat them here.
The light guide plate that several pieces are parallel to each other, as first light guide plate 602,604 and 606, be arranged on the reflecting material 206 in the mode of space one predeterminable range, and form a plurality of spaces that insert and put, as shown in Figure 6 two insert and put space 608, wherein each inserts and puts space 608 and holds the light sources 204a of delegation.Just, each line light source group 204a is between two first adjacent light guide plate.Present embodiment also can be provided with a diffusion structure at least sealing arbitrary groove of these grooves 608, and this diffusion structure also is positioned at the top of this journey light sources that groove holds, and this diffusion structure can be the structure of arbitrary shape.
Backlight module that the above embodiment of the present invention discloses, it is provided with the design of light guide plate around light emitting diode, can so that the light of light emitting diode in very short light mixing distance by mixed light equably, break away from the yoke of traditional mixed light design, dwindle the volume of backlight module widely, meet now LCD and move towards compact trend requirement.
In sum; though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art without departing from the spirit and scope of the present invention; can do a little change and retouching, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (10)
1. backlight module comprises:
One framework, central formation one accommodation space;
One circuit board is arranged in this accommodation space of this framework;
A plurality of led of side view type are electrically connected with this circuit board, and are convexly set on this circuit board; And
One light guide plate is arranged on this circuit board, and has at least one opening that runs through, and this runs through opening in order to ccontaining those led of side view type;
Wherein, the light of those led of side view type will be incident in this light guide plate by this inwall that runs through opening.
2. backlight module as claimed in claim 1, wherein this backlight module also comprises:
One reflecting material is arranged on this circuit board in the mode that attaches or apply.
3. backlight module as claimed in claim 2, wherein this reflecting material forms at least one port, and this port is used for those light emitting diodes and is convexly set in this reflecting material.
4. backlight module as claimed in claim 1, wherein this backlight module also comprises:
One diffusion structure is arranged on this light guide plate in the mode that covers this opening.
5. backlight module as claimed in claim 4, wherein this diffusion structure is that a diffusion is dull and stereotyped.
6. backlight module as claimed in claim 4, wherein this diffusion structure is a diffusion cylinder.
7. backlight module as claimed in claim 1, wherein those light emitting diodes formation multirow light sources, and this opening are many grooves, respectively this groove is in order to ccontaining respectively this line light source group.
8. backlight module as claimed in claim 1, wherein individually ccontaining respectively this light emitting diode of those openings of this light guide plate.
9. backlight module as claimed in claim 1, wherein those light emitting diodes formation multirow light sources, and this light guide plate have a plurality of first light guide plate that are parallel to each other, and respectively this line light source group is between this adjacent 2 first light guide plate.
10. backlight module as claimed in claim 1, wherein those light emitting diodes are the light emitting diode of a plurality of lateral emitting types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100334121A CN100346214C (en) | 2004-04-07 | 2004-04-07 | Backlight modular |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100334121A CN100346214C (en) | 2004-04-07 | 2004-04-07 | Backlight modular |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1564066A CN1564066A (en) | 2005-01-12 |
| CN100346214C true CN100346214C (en) | 2007-10-31 |
Family
ID=34481340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100334121A Expired - Fee Related CN100346214C (en) | 2004-04-07 | 2004-04-07 | Backlight modular |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100346214C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388078C (en) * | 2005-03-29 | 2008-05-14 | 友达光电股份有限公司 | Backlight module |
| KR101165840B1 (en) * | 2005-06-09 | 2012-07-13 | 엘지디스플레이 주식회사 | Back Light Unit And Liquid Crystal Display using the same |
| US7695178B2 (en) | 2005-06-23 | 2010-04-13 | Samsung Electronics Co., Ltd | Light-guide plate, backlight assembly and liquid crystal display having the same |
| KR101134302B1 (en) * | 2005-06-30 | 2012-04-13 | 엘지디스플레이 주식회사 | cover bottom for liquid crystal display device, LED back light assembly and liquid crystal display module using thereof |
| CN100365485C (en) * | 2005-08-31 | 2008-01-30 | 友达光电股份有限公司 | Direct type backlight module |
| CN100446282C (en) * | 2005-09-19 | 2008-12-24 | 深圳帝光电子有限公司 | LED light source product |
| JP4333727B2 (en) * | 2006-11-13 | 2009-09-16 | エプソンイメージングデバイス株式会社 | ELECTRO-OPTICAL DEVICE, LIGHTING DEVICE, AND ELECTRONIC DEVICE |
| TWI364557B (en) | 2008-05-02 | 2012-05-21 | Chimei Innolux Corp | Light source and backlight module and liquid crystal display device using same |
| CN103912847A (en) * | 2013-01-09 | 2014-07-09 | 北京京东方光电科技有限公司 | Light guide plate, backlight source and display device |
| TW201543118A (en) * | 2014-05-05 | 2015-11-16 | Au Optronics Corp | Back light module and display device |
| CN110515240B (en) * | 2019-08-30 | 2022-10-18 | 厦门天马微电子有限公司 | Backlight module, manufacturing method thereof and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2324556Y (en) * | 1998-02-13 | 1999-06-16 | 台湾光宝电子股份有限公司 | Back light plate of light conducting plate with prism structure |
| CN1264909A (en) * | 1999-02-12 | 2000-08-30 | 松下电器产业株式会社 | Portable terminal device |
| CN2434586Y (en) * | 2000-07-21 | 2001-06-13 | 台湾得意温控科技股份有限公司 | Light hood temp control indicator for freezing air conditioner |
| CN2462230Y (en) * | 2000-12-28 | 2001-11-28 | 张文虎 | Multipurpose LED circular transmitting signal lamp |
| CN2480990Y (en) * | 2001-06-18 | 2002-03-06 | 广东科龙电器股份有限公司 | Color changeable multi-color type back lingting board for LED |
| CN1386254A (en) * | 2000-07-31 | 2002-12-18 | 日本精机株式会社 | Back light illumination device |
-
2004
- 2004-04-07 CN CNB2004100334121A patent/CN100346214C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2324556Y (en) * | 1998-02-13 | 1999-06-16 | 台湾光宝电子股份有限公司 | Back light plate of light conducting plate with prism structure |
| CN1264909A (en) * | 1999-02-12 | 2000-08-30 | 松下电器产业株式会社 | Portable terminal device |
| CN2434586Y (en) * | 2000-07-21 | 2001-06-13 | 台湾得意温控科技股份有限公司 | Light hood temp control indicator for freezing air conditioner |
| CN1386254A (en) * | 2000-07-31 | 2002-12-18 | 日本精机株式会社 | Back light illumination device |
| CN2462230Y (en) * | 2000-12-28 | 2001-11-28 | 张文虎 | Multipurpose LED circular transmitting signal lamp |
| CN2480990Y (en) * | 2001-06-18 | 2002-03-06 | 广东科龙电器股份有限公司 | Color changeable multi-color type back lingting board for LED |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1564066A (en) | 2005-01-12 |
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Granted publication date: 20071031 |
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| CF01 | Termination of patent right due to non-payment of annual fee |