CN2725942Y - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN2725942Y CN2725942Y CN 200420074021 CN200420074021U CN2725942Y CN 2725942 Y CN2725942 Y CN 2725942Y CN 200420074021 CN200420074021 CN 200420074021 CN 200420074021 U CN200420074021 U CN 200420074021U CN 2725942 Y CN2725942 Y CN 2725942Y
- Authority
- CN
- China
- Prior art keywords
- backlight module
- circuit board
- light emitting
- emitting diode
- light
- 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 12
- 239000000463 material Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- -1 acryl Chemical group 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The utility model relates to a backlight module which applies LEDs as the light source, installed on the rear side of a flat panel display device as the background light source. The backlight module comprises a circuit board, a reflection part and a light leading board. The circuit board is parallel to the flat panel display device and is provided with a plurality of LEDs. The reflection part forms a groove whose outlet direction is parallel to the circuit board. The reflection part can reflect the light ray parallel to the circuit board. The light leading board is parallel to the circuit board. One end of the light leading board is fixed in the groove of the reflection part and provided with a light outlet face and a reflection face. The light outlet face is adjacent to the flat panel display device. The backlight module can decrease the entire thickness and reduce elements.
Description
Technical field
The utility model relates to a kind of backlight module, and referring in particular to a kind of application light emitting diode is light source, is arranged at flat-panel screens, as LCD, the back side with backlight module as its backlight.
Background technology
(Liquid crystal display LCD) has features such as low consumpting power, slim light and handy and low voltage drive, has become a kind of flat-panel screens that is widely used because LCD.Yet because liquid crystal layer itself can't be luminous, so all need extra light source module so that LCD light to be provided, wherein light source module is arranged at its back side person and is called backlight module.
Moreover, because light emitting diode (Light emitting diode LED) is a low power consumption and light emitting element with high brightness has light stability, advantages such as long service life, and be particularly suitable in the LCD light source.
See also Fig. 1, be a kind of side sectional view of backlight module of prior art tool LED source.This backlight module 9 includes a circuit board 91; This circuit board 91 is provided with a plurality of light emitting diodes 92, the edge of this light emitting diode 92 is provided with one first reflecting part 93, this first reflecting part 93 has oval reflecting wall light vertically is bent to a light mixing plate 94, this light mixing plate 94 is connected in this reflecting part 93, after the mixing of the shades of colour light after the reflection, guide to one second reflecting part 95, this second reflecting part 95 is with mixed light double flat to a light guide plate (Light guide plate, LGP) 97, and be dissipated into LCD 8 uniformly to exiting surface via a reflectance coating (reflective foil) 96 of being located at these light guide plate 97 bottom surfaces.
See also Fig. 2, be the combination stereogram of above-mentioned Backlight module and liquid crystal display, owing to this backlight module is provided with the light emitting diode of many different colours and light mixing plate need be set, and the design that adopts light mixing plate and light guide plate to pile up.Yet because the electronic product thickness requirement is more and more thin, above-mentioned backlight module is because have two light guide plate, and its thickness obviously increases the thickness of whole electronic product, does not obviously meet existing growth requirement.
In addition, prior art early has the side that light emitting diode directly is arranged at light guide plate, and wherein circuit board is perpendicular to LCD, yet because light emitting diode can produce heat, this kind design causes a kind of environment that is unfavorable for that heat distributes.
Be with, as from the foregoing, above-mentioned known backlight module on reality is used, obviously has inconvenience and defective, and waits to be improved.
Summary of the invention
Fundamental purpose of the present utility model provides a kind of backlight module, can reduce integral thickness and reduce element, to meet the electronic product growth requirement and to reduce cost.
For reaching above-mentioned purpose, a kind of backlight module of the present utility model is the back side that is arranged at flat-panel screens, comprises a circuit board, is parallel to this flat-panel screens, and is provided with several light emitting diodes; One reflecting part has a reflecting wall, its by the curved edge of this light emitting diode extend to this a light emitting diode top and fixing wall, be parallel to this reflecting wall, and form the fluting that a Way out is parallel to this circuit board; And a light guide plate, parallel this circuit board, one end are fixed in this fluting of this reflecting part, and have an exiting surface and a reflecting surface, and this exiting surface is adjacent to this flat-panel screens.
Described backlight module, wherein this light emitting diode is to connect with the surface mount technology form.Wherein this light emitting diode is a white light emitting diode.Wherein this light emitting diode is the mixed light light emitting diode.Wherein the reflecting wall of this reflecting part further extends a predetermined length forward, and is located at this light guide plate top.Wherein the reflecting wall inboard of this reflecting part is coated with the material that can strengthen reflection.Wherein this circuit board further is provided with a lamp socket, and wherein this light emitting diode is arranged on this lamp socket.Wherein this reflecting part is fixed on the lamp socket of this circuit board.Wherein this reflecting part is to be directly fixed on this circuit board.Wherein the material of this light guide plate be optical plastic or acryl (polymethylmethacrylate, PMMA).Described backlight module further includes one first diffusion sheet, is positioned at the exiting surface top of this light guide plate; One rhombus lens is positioned at this first diffusion sheet top; And one second diffusion sheet is positioned at directly over this rhombus lens.
Therefore characteristics of the present utility model and function are:
Backlight module of the present utility model reduces integral thickness and also reduces parts number, meets the electronic product growth requirement and reduces the cost of product.
In this conjunction with figs. preferred embodiment of the present utility model is described in detail as follows, but these explanations only are to be used for illustrating the utility model, but not scope of the present utility model is done any restriction.
Description of drawings
Fig. 1: the side sectional view that is the backlight module of prior art tool LED source.
Fig. 2: the combination stereogram that is the Backlight module and liquid crystal display of prior art.
Fig. 3: the side sectional view that is backlight module of the present utility model.
Fig. 4: the combination stereogram that is the utility model backlight module and flat-panel screens.
Fig. 5: the side sectional view that is the utility model backlight module second embodiment.
Wherein, description of reference numerals is as follows:
LCD 8
Backlight module 9
Circuit board 91 light emitting diodes 92
First reflecting part, 93 tabula rasas 94
Second reflecting part, 95 reflectance coatings 96
Light guide plate 97
Reflecting part 16
Reflecting wall 162,162 ' fixing wall 164
Fluting 166
Reflecting surface 182 exiting surfaces 184
First diffusion sheet, 185 rhombus lens 186
Embodiment
See also Fig. 3 and Fig. 4, be the side sectional view of backlight module of the present utility model, and the combination stereogram of backlight module and flat-panel screens.Backlight module 1 of the present utility model is the back side that is arranged at a flat-panel screens 8, and this backlight module 1 comprises a circuit board 12, several light emitting diodes 14, a reflecting part 16, reaches a light guide plate 18.
This circuit board 12 is to be parallel to this flat-panel screens 8, and it can be hardboard or soft board.These several light emitting diodes 14 are to be arranged on this circuit board 12.This circuit board 12 is outsides of being located at whole display device, and this kind design helps its heat outwards disperses, and forms a kind of good heat dissipation environment.
This light emitting diode 14 is preferably that (its overall volume is less, does not more expend the space for surface mount technology, SMT) form and be directly welded in this circuit board 12 with surface mount technology.In this embodiment, this light emitting diode 14 is preferably white light emitting diode, perhaps also can be the mixed light light emitting diode.Wherein the number of light emitting diode can differently because of the demand of the illumination (Illumination) of LCD change to some extent.
This reflecting part 16 covers at the top of this light emitting diode 14, in order to the light vertical reflection to enter this light guide plate 18, this reflecting part 16 has a reflecting wall 162 and a fixing wall 164.The section of this reflecting wall 162 is ovalizes slightly, and by these light emitting diode 14 curved edges extend to this light emitting diode 14 tops; This fixing wall 164 is parallel to this reflecting wall 162, and forms the fluting 166 that a Way out is parallel to this circuit board 12.Wherein the reflecting wall 162 of this reflecting part 16 is to be made by the good material of reflection, and perhaps its inboard is coated with the material that can strengthen reflection.
Wherein this circuit board 12 further can be provided with a lamp socket 13 for these light emitting diode 14 settings thereon, and this reflecting part 16 can be to be fixed on the lamp socket 13 of this circuit board 12.Perhaps, this reflecting part 16 also can be directly to be fixed on this circuit board 12, for example with the welding or the mode of screw lock.
This light guide plate 18 is parallel to this circuit board 12, and the one end is fixed in this fluting 166 of this reflecting part 16, and has a reflecting surface 182 and an exiting surface 184, and this exiting surface 184 is to be adjacent to this flat-panel screens 8.Wherein the material of this light guide plate 18 can be acryl (polymethylmethacrylate, PMMA) or optical plastic (Plastic Division is commonly called as PC material or plastic rubber material), in the titania (TiO that wherein includes 50%～80%
2) the diffusion grain, its role is to make light quilt scattering more equably when penetrating this light guide plate 18.
See also Fig. 5, be the side sectional view of backlight module second embodiment of the present utility model.Wherein this light emitting diode 14 can be that the red, green, blue light-emitting diode that can blend together white light is set, in order to make its even mixing, wherein the reflecting wall 162 ' of this reflecting part 16 further extends the part top that a predetermined length covers this light guide plate 18 forward, light is mixed in the leading portion of this light guide plate 18 earlier, evenly send by these light guide plate 18 back segments again.
But, more than disclosed, only be the utility model preferred embodiment, can not limit scope of the present utility model with this, therefore the equalization of being done according to the utility model application range changes or modifies, and still belongs to the scope that the utility model is contained.
Claims (11)
1, a kind of backlight module is arranged at the back side of flat-panel screens, it is characterized in that comprising:
One circuit board is parallel to this flat-panel screens, and is provided with several light emitting diodes;
One reflecting part has a reflecting wall, its along the curved edge of this light emitting diode extend to this a light emitting diode top and fixing wall, it is parallel to this reflecting wall, and is formed with the fluting that a Way out is parallel to this circuit board; And
One light guide plate is parallel to this circuit board, and the one end is fixed in this fluting of this reflecting part, and has an exiting surface and a reflecting surface, and this exiting surface is adjacent to this flat-panel screens.
2, backlight module as claimed in claim 1 is characterized in that this light emitting diode is for to be arranged at this circuit board with the surface mount technology form.
3, backlight module as claimed in claim 1 is characterized in that this light emitting diode is a white light emitting diode.
4, backlight module as claimed in claim 1 is characterized in that this light emitting diode is the red, green, blue light emitting diode that blendes together white light.
5, backlight module as claimed in claim 4 is characterized in that the reflecting wall of this reflecting part further extends a predetermined length forward, and is located at this light guide plate top.
6, backlight module as claimed in claim 1 is characterized in that the reflecting wall inboard of this reflecting part is coated with the material that can strengthen reflection.
7, backlight module as claimed in claim 1 is characterized in that this circuit board further is provided with a lamp socket, and wherein this light emitting diode is arranged on this lamp socket.
8, backlight module as claimed in claim 7 is characterized in that this reflecting part is fixed on the lamp socket of this circuit board.
9, backlight module as claimed in claim 1 is characterized in that this reflecting part is directly fixed on this circuit board.
10, backlight module as claimed in claim 1, the material that it is characterized in that this light guide plate is optical plastic or polymethylmethacrylate.
11, backlight module as claimed in claim 1 is characterized in that further including one first diffusion sheet, is positioned at the exiting surface top of this light guide plate; One rhombus lens is positioned at this first diffusion sheet top; And one second diffusion sheet, be positioned at directly over this rhombus lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074021 CN2725942Y (en) | 2004-08-02 | 2004-08-02 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074021 CN2725942Y (en) | 2004-08-02 | 2004-08-02 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2725942Y true CN2725942Y (en) | 2005-09-14 |
Family
ID=35040655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420074021 Expired - Fee Related CN2725942Y (en) | 2004-08-02 | 2004-08-02 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2725942Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346581B (en) * | 2006-04-19 | 2010-05-19 | 夏普株式会社 | Backlight device and display using it |
| CN101075605B (en) * | 2006-05-15 | 2011-05-11 | 奇美电子股份有限公司 | Structure for packing light-emitting diodes, backlight module and liquid crystal display device thereof |
| CN101562174B (en) * | 2008-04-16 | 2011-05-18 | 宏齐科技股份有限公司 | LED chip encapsulating structure for backlight module and preparing method thereof |
| CN102269387A (en) * | 2010-06-01 | 2011-12-07 | 中强光电股份有限公司 | Light guiding unit and light source module |
| CN102297347A (en) * | 2010-06-28 | 2011-12-28 | 艾迪光电（杭州）有限公司 | Area source device and LCD (liquid crystal display) |
| CN103688100A (en) * | 2011-02-08 | 2014-03-26 | Ge照明解决方案有限责任公司 | Blade of light luminaire |
| CN108614372A (en) * | 2018-06-06 | 2018-10-02 | 上海中航光电子有限公司 | Liquid crystal display device |
| CN113341496A (en) * | 2020-02-18 | 2021-09-03 | 淮安达方电子有限公司 | Backlight module |
| TWI756111B (en) * | 2020-07-16 | 2022-02-21 | 達方電子股份有限公司 | Backlight module |
| WO2024037476A1 (en) * | 2022-08-14 | 2024-02-22 | 湛玉文 | Reflective backlight module of liquid crystal display |
-
2004
- 2004-08-02 CN CN 200420074021 patent/CN2725942Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346581B (en) * | 2006-04-19 | 2010-05-19 | 夏普株式会社 | Backlight device and display using it |
| CN101075605B (en) * | 2006-05-15 | 2011-05-11 | 奇美电子股份有限公司 | Structure for packing light-emitting diodes, backlight module and liquid crystal display device thereof |
| CN101562174B (en) * | 2008-04-16 | 2011-05-18 | 宏齐科技股份有限公司 | LED chip encapsulating structure for backlight module and preparing method thereof |
| CN102269387A (en) * | 2010-06-01 | 2011-12-07 | 中强光电股份有限公司 | Light guiding unit and light source module |
| CN102269387B (en) * | 2010-06-01 | 2013-08-28 | 中强光电股份有限公司 | Light guiding unit and light source module |
| CN102297347B (en) * | 2010-06-28 | 2014-12-10 | 浙江思朗照明有限公司 | Area source device and LCD (liquid crystal display) |
| CN102297347A (en) * | 2010-06-28 | 2011-12-28 | 艾迪光电（杭州）有限公司 | Area source device and LCD (liquid crystal display) |
| CN103688100A (en) * | 2011-02-08 | 2014-03-26 | Ge照明解决方案有限责任公司 | Blade of light luminaire |
| US9395478B2 (en) | 2011-02-08 | 2016-07-19 | GE Lighting Solutions, LLC | Blade of light luminaire |
| CN108614372A (en) * | 2018-06-06 | 2018-10-02 | 上海中航光电子有限公司 | Liquid crystal display device |
| CN108614372B (en) * | 2018-06-06 | 2021-07-16 | 上海中航光电子有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN113341496A (en) * | 2020-02-18 | 2021-09-03 | 淮安达方电子有限公司 | Backlight module |
| CN113341496B (en) * | 2020-02-18 | 2023-10-03 | 淮安达方电子有限公司 | Backlight module |
| TWI756111B (en) * | 2020-07-16 | 2022-02-21 | 達方電子股份有限公司 | Backlight module |
| WO2024037476A1 (en) * | 2022-08-14 | 2024-02-22 | 湛玉文 | Reflective backlight module of liquid crystal display |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050914 Termination date: 20120802 |