CN100376952C - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN100376952C CN100376952C CNB2003101125881A CN200310112588A CN100376952C CN 100376952 C CN100376952 C CN 100376952C CN B2003101125881 A CNB2003101125881 A CN B2003101125881A CN 200310112588 A CN200310112588 A CN 200310112588A CN 100376952 C CN100376952 C CN 100376952C
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- China
- Prior art keywords
- light
- backlight module
- light guide
- base plate
- guide base
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Abstract
The present invention relates to a back light module which comprises at least one point light source, an upper light guide base plate, a lower light guide base plate, at least one coupler and at least one light guide optical fiber, wherein the light guide optical fiber is clamped by the upper and the lower light guide base plates, the two light guide base plates are respectively provided with a groove infinitesimal disturbance structure to match the light guide optical fiber, and the depth of the infinitesimal disturbance structures which are far from the point light source is gradually increased. The back light module of the present invention has the advantages of high coupling efficiency of the light source, high light emergent uniformity, etc., and is suitable for flat displays and various occasions, such as general optical illumination, etc.
Description
[technical field]
The invention relates to a kind of backlight module, especially a kind of backlight liquid crystal display module that is applied to.
[background technology]
Because advantages such as LCD has gently, approaches, power consumption is little, so be widely used in modernized information equipments such as notebook, mobile phone, personal digital assistant.Do not have a characteristics of luminescence because of liquid crystal itself, being required to be it provides backlight module to realize Presentation Function.Backlight module need have higher outgoing light homogeneity, thereby promotes the display performance that adopts this backlight module.
The prior art backlight module comprises light source and light guide plate, and light source is the light entrance face setting of relative light guide plate, and the transmission direction that this light-guide plate guides is sent light beam from light source converts line source or pointolite to the area source outgoing.
General at present employing cold cathode fluorescent lamp pipe is as light source, though the emitting brightness height of cold cathode fluorescent lamp pipe, there is following defective in it: the relative center section of two ends luminosity of cold cathode fluorescent lamp pipe is low, causes the backlight module outgoing light homogeneity not high; The cold cathode fluorescent lamp pipe must high pressure and by the AC power supply, this is a very big defective to portable display, and AC signal can influence and disturb the image signal of LCD; The cold cathode fluorescent lamp pipe is that right cylinder is luminous, and the efficiency of light energy utilization is low; The life-span of cold cathode fluorescent lamp pipe can be subjected to temperature effect and significantly reduce; In addition, use the LCD cost of cold cathode fluorescent lamp pipe higher relatively.
For overcoming the defective of cold cathode fluorescent lamp pipe, the prior art backlight module can adopt pointolites such as light emitting diode.See also Fig. 1, a kind of prior art backlight module 1 is made up of pointolite 11, light guide plate 10 and reflecting plate 13; Wherein, this pointolite 11 is positioned at this light guide plate 10 incidence surfaces 101 1 sides, and this reflecting plate 13 is positioned at this light guide plate 10 bottom surfaces 103 1 sides.For strengthening outgoing light homogeneity, these light guide plate 10 bottom surfaces 103 are distributed with site 121, and exiting surface 102 is provided with light converging pattern 122; But the prior art backlight module 1 has the following disadvantages: this backlight module uses pointolite 11, and the bright dipping light distribution is inhomogeneous, and in addition, light utilization efficiency is not high yet.
[summary of the invention]
In order to overcome the low and not high defective of outgoing light homogeneity of the prior art backlight module efficiency of light energy utilization, the invention provides a kind of efficiency of light energy utilization height and the high backlight module of outgoing light homogeneity.
The technical scheme of technical solution problem of the present invention is: a backlight module is provided, it comprises at least one pointolite, at least one coupling mechanism that is connected with this pointolite, at least one and the light-conductive optic fibre and that this coupling mechanism is connected light guide base plate and light guide base plate once, this upper and lower light guide base plate is provided with the bending that the groove perturbed structure comes the feasible light-conductive optic fibre that is clamped in therebetween of clamping light-conductive optic fibre to produce groove perturbation shape respectively, wherein, the point of distance source ends groove perturbed structure degree of depth increases gradually.
Compared with prior art, backlight module of the present invention adopts light-conductive optic fibre that the light beam that pointolite sends is evenly imported light guide plate inside, because the coupling efficiency height between light-conductive optic fibre and the pointolite can promote the efficiency of light energy utilization; Utilize the groove perturbed structure of upper and lower light guide base plate, make light beam destroyed at the total reflection condition of light-conductive optic fibre inside, in addition, because the optical fiber perturbed structure is dark more, its light leak energy is big more, because luminous energy is little apart from light source,, reach the effect of bright dipping balancing energy everywhere at a distance again so point of distance light source place perturbed structure is darker.
[description of drawings]
Fig. 1 is a kind of stereographic map of prior art backlight module.
Fig. 2 is the three-dimensional exploded view of backlight module first embodiment of the present invention.
Fig. 3 is the side schematic view of backlight module shown in Figure 2.
Fig. 4 is the enlarged drawing of the dashed circle portion among Fig. 3.
Fig. 5 is the stereographic map of backlight module second embodiment of the present invention.
[embodiment]
Seeing also Fig. 2 and Fig. 3, is backlight module first embodiment of the present invention.This backlight module 200 comprises pointolite 210, a coupling mechanism 250, the light-conductive optic fibre 240 of one group of 210 luminous bundle of transmission pointolite and the light guide base plate 220,230 of this group light-conductive optic fibre 240 of clamping; These coupling mechanism 250 tie point light sources 210 and light-conductive optic fibre 240.
This pointolite 210 can be micromolecule light emitting diode or polymer LED, also can adopt laser diode to increase brightness.
This group light-conductive optic fibre 240 is used for transmitting the light beam that pointolite 210 is sent, and it is easy to be coupled with pointolite 210, can effectively promote the efficiency of light energy utilization of backlight module 100, thereby increases brightness.This group light-conductive optic fibre 240 generally is the highly purified glass material of reeling off raw silk from cocoons, for light beam provides low-loss transmission path, and also heat resistant plastice optical fiber, radius is below 1000 microns.
These light guide base plate 220,230 clamping light-conductive optic fibres 240, its facing surfaces 222 and 232 is provided with groove perturbed structure 224 and 234 with the 240 feasible bendings that are clamped in light-conductive optic fibres 240 generation groove perturbation shapes therebetween of clamping light-conductive optic fibre, wherein, the point of distance light source 210 end groove perturbed structures 224 and 234 degree of depth increase gradually, make segment beam even output because the total reflection condition of light-conductive optic fibre 240 is destroyed, final beam is from surface 221 outgoing of last light guide base plate 220.
Together consult Fig. 4, the material of this light guide base plate 220,230 be selected from optical grade acrylic polymers, high molecular polymer, macromolecule carbonization thing, glass or quartzy one of them, be to adopt ejection formation or cut manufactured, shape roughly is parallelepipedon, its facing surfaces 222 and 232 groove perturbed structure can be finished via Precision Machining, make the light-conductive optic fibre 240 that is clamped in therebetween produce required radius of curvature R, thereby broken beam is realized the function of linear light sorurce at the total reflection condition of light-conductive optic fibre 240 inside.
The surface 221 that should go up light guide base plate 220 is provided with microlens array 223, with the light beam of gathering from surperficial 221 outgoing, thus the brightness that improves backlight module 200.This microlens array 223 comprises the lenticule bar (not indicating) of a plurality of continuous settings, but these a plurality of lenticule bars also can be provided with at interval.The xsect of this lenticule bar is triangular in shape, but also can be rectangle, shape such as trapezoidal.This surface of going up light guide base plate 220 also can be offered groove and replace this microlens array 223.
The surface 231 of this time light guide base plate 230 is provided with reflectance coating (figure does not show), and this reflectance coating is by SiO
2With TiO
2Alternately the multilayer film that form make projection beam reflection thereon, overflow from this surface 231 to prevent light beam, and this reflectance coating can adopt chemical vapour deposition technique, electron beam evaporation plating method or sputtering method to form, and its reflectivity at visible region can reach more than 98%.But this reflectance coating can be metallic reflective coatings such as silver, aluminium also, also can be close to this surface 231 and a reflecting plate (figure do not show) is set replaces reflectance coating to realize this function.
Seeing also Fig. 5, is backlight module second embodiment of the present invention.This embodiment and the first embodiment difference are: this mould 300 backlight comprises the light-conductive optic fibre 340 of one group of pointolite 310, one group of coupling mechanism 350, one group of 310 luminous bundle of transmission pointolite, and every bit light source 310 is coupled with a light-conductive optic fibre 340; These group coupling mechanism 350 tie point light sources 310 and light-conductive optic fibre 340.
This backlight module 300 also comprises the light guide base plate 320,330 of this group light-conductive optic fibre 340 of clamping.
This pointolite 310 can be micromolecule light emitting diode or polymer LED, also can adopt laser diode to increase brightness.
This group light-conductive optic fibre 340 is to be used for transmitting the light beam that pointolite 310 is sent, and it is easy to be coupled with pointolite 310, can effectively promote the efficiency of light energy utilization of backlight module 300, thereby increases brightness.This group light-conductive optic fibre 340 is the highly purified glass materials of reeling off raw silk from cocoons, and it provides low-loss transmission path for light beam, also can be heat resistant plastice optical fiber, and radius is below 1000 microns.
These light guide base plate 320,330 clamping light-conductive optic fibres 340, its facing surfaces 322 and 332 is provided with groove perturbed structure 324 and 334 and mates light-conductive optic fibre 340, wherein, the point of distance light source 310 end groove perturbed structures 324 and 334 degree of depth increase gradually, make segment beam even output because the total reflection condition of light-conductive optic fibre 340 is destroyed, final beam is from surface 321 outgoing of last light guide base plate 320.
Certainly, the present invention can also have other improvement or replacement.For example: can be further on vicinity upper surface one side of light guide base plate 220,320 diffuser plate and prismatic lens (figure does not show) are set.
Claims (9)
1. backlight module, it comprises at least one pointolite, it is characterized in that: this backlight module also comprises on one light guide base plate and once light guide base plate, at least one coupling mechanism that is connected with this pointolite and at least one light-conductive optic fibre that is connected with this coupling mechanism, should go up light guide base plate and this time light guide base plate the bending that corresponding groove perturbed structure comes the feasible light-conductive optic fibre that is clamped in therebetween of clamping light-conductive optic fibre to produce groove perturbation shape is set respectively, the point of distance source ends groove perturbed structure degree of depth increases gradually.
2. backlight module as claimed in claim 1 is characterized in that: this pointolite is light emitting diode or laser diode.
3. backlight module as claimed in claim 1 is characterized in that: this light-conductive optic fibre is reel off raw silk from cocoons material or a heat resistant plastice optical fiber of highly purified glass.
4. backlight module as claimed in claim 1 is characterized in that: this light-conductive optic fibre radius is less than 1000 microns.
5. backlight module as claimed in claim 1 is characterized in that: upper surface of light guide base plate is provided with microlens array on this.
6. backlight module as claimed in claim 5 is characterized in that: this microlens array comprises the lenticule bar of a plurality of continuous settings.
7. backlight module as claimed in claim 5 is characterized in that: this microlens array comprises the lenticule bar that a plurality of intervals are provided with.
8. backlight module as claimed in claim 1 is characterized in that: this time light guide base plate lower surface is provided with reflectance coating.
9. backlight module as claimed in claim 1 is characterized in that: it also comprises the reflecting plate of the lower surface that is arranged on contiguous this time light guide base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101125881A CN100376952C (en) | 2003-12-08 | 2003-12-08 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101125881A CN100376952C (en) | 2003-12-08 | 2003-12-08 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1627150A CN1627150A (en) | 2005-06-15 |
| CN100376952C true CN100376952C (en) | 2008-03-26 |
Family
ID=34759832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101125881A Expired - Fee Related CN100376952C (en) | 2003-12-08 | 2003-12-08 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100376952C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303476B (en) * | 2007-05-09 | 2011-12-28 | 奇美电子股份有限公司 | Backlight module and LCD device using the same |
| CN101963311A (en) * | 2010-07-31 | 2011-02-02 | 宁波市瑞康光电有限公司 | LED backlight component, liquid crystal display and display terminal |
| CN102384400A (en) * | 2010-08-30 | 2012-03-21 | 深圳帝光电子有限公司 | Flexible light-emitting module and illuminating device |
| CN102494297A (en) * | 2011-12-07 | 2012-06-13 | 南京中电熊猫液晶显示科技有限公司 | Backlight module utilizing ambient light and liquid crystal display device comprising same |
| CN102913866B (en) * | 2012-09-25 | 2016-09-07 | 京东方科技集团股份有限公司 | The back board structure of a kind of backlight, backlight module and display device |
| CN103032822A (en) * | 2012-12-12 | 2013-04-10 | 深圳市华星光电技术有限公司 | Optical fiber for backlight module, backlight module and liquid crystal display device |
| CN103574377B (en) * | 2013-11-19 | 2016-05-25 | 重庆市光遥光电节能科技有限公司 | A kind of bare fibre formula face light generating apparatus |
| CN104658432B (en) * | 2015-03-11 | 2017-08-01 | 京东方科技集团股份有限公司 | Double-side display device, driving method and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613024A (en) * | 1995-12-21 | 1997-03-18 | Lucent Technologies Inc. | Alignment of optical fiber arrays to optical integrated circuits |
| JPH0980242A (en) * | 1995-09-11 | 1997-03-28 | Mitsubishi Rayon Co Ltd | Manufacture of linear light guide |
| CN2429853Y (en) * | 2000-05-12 | 2001-05-09 | 宋义 | Background and front light sources with high effective side luminous lights |
| DE20103501U1 (en) * | 2001-02-23 | 2001-07-12 | Liebetruth Jochen | Device for monitoring the interfaces of fiber optic light guides |
| US20010017773A1 (en) * | 2000-02-08 | 2001-08-30 | Minebea Co., Ltd | Spread illuminating apparatus |
| CN1453600A (en) * | 2002-04-24 | 2003-11-05 | 达方电子股份有限公司 | Light-emitting member, its manufacture and light-emitting keyboard with the member |
-
2003
- 2003-12-08 CN CNB2003101125881A patent/CN100376952C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0980242A (en) * | 1995-09-11 | 1997-03-28 | Mitsubishi Rayon Co Ltd | Manufacture of linear light guide |
| US5613024A (en) * | 1995-12-21 | 1997-03-18 | Lucent Technologies Inc. | Alignment of optical fiber arrays to optical integrated circuits |
| US20010017773A1 (en) * | 2000-02-08 | 2001-08-30 | Minebea Co., Ltd | Spread illuminating apparatus |
| CN2429853Y (en) * | 2000-05-12 | 2001-05-09 | 宋义 | Background and front light sources with high effective side luminous lights |
| DE20103501U1 (en) * | 2001-02-23 | 2001-07-12 | Liebetruth Jochen | Device for monitoring the interfaces of fiber optic light guides |
| CN1453600A (en) * | 2002-04-24 | 2003-11-05 | 达方电子股份有限公司 | Light-emitting member, its manufacture and light-emitting keyboard with the member |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1627150A (en) | 2005-06-15 |
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Granted publication date: 20080326 Termination date: 20171208 |
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