CN101105600A - Backlight module - Google Patents
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- CN101105600A CN101105600A CNA200610098844XA CN200610098844A CN101105600A CN 101105600 A CN101105600 A CN 101105600A CN A200610098844X A CNA200610098844X A CN A200610098844XA CN 200610098844 A CN200610098844 A CN 200610098844A CN 101105600 A CN101105600 A CN 101105600A
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- reflectance coating
- light
- emergent light
- backlight module
- light face
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Abstract
A backlight module comprises a light source, a light guide board and a reflection film; wherein the light guide board has an incoming light surface, a first exit light surface and a second exit light surface; the light radiating from light source radiates into the light guide board through the incoming light surface and is output from the first exit light surface and the second exit light surface; the reflection film is suitable for moving between a first position and a second position; furthermore, when reflection film is positioned on the first position, the reflection film is close to the first exit light surface so as to reflect the light output from the first exit light surface back to the guide light board, and the light radiating from the guide light board is output from the second exit light surface; conversely, when the reflection film is positioned on the second position, the reflection film stays far from the first exit light surface of the light guide board and hence can allow the light radiating into the guide light board be output from the first exit light surface. A mobile phone and a liquid crystal display device which adopt the backlight modules can have the lighting function.
Description
Technical field
The present invention relates to a kind of light source module, particularly a kind of backlight module and adopt this backlight module and have the LCD and the mobile phone of illumination functions.
Background technology
Development along with the radio communication and the information processing technology, mobile phone, personal digital assistant (personal digital assistant, PDA) etc. portable electron device competitively emerges in large numbers, all facilities that make the consumer to enjoy high-tech to the full whenever and wherever possible to be brought.Wherein, the height carrying convenience that mobile phone had impels also that develop recently can be as the mobile phone of electric torch, so that under unexpected situation, in time provide the light that can be used for throwing light on to the user.
Yet in the mobile phone that has illumination functions at present, it provides illuminating ray and the required light of display panels show image respectively with two groups of light sources.As U.S. Pat 6755549, US 6474828, US 6341871, this method makes that not only the cost of mobile phone is difficult to reduce, and is unfavorable for that more the function of mobile phone is integrated.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of backlight module, it optionally changes the direction of beam projecting, to be provided at needed light under the various different situations to the user.
Another object of the present invention is to provide a kind of mobile phone with illumination functions, it can be converted to the area source of display screen illuminating pointolite, to improve light utilization.
Another purpose of the present invention is to provide a kind of LCD, and it comprises above-mentioned backlight module, therefore can have the function of illumination simultaneously.
For realizing above-mentioned and other purpose, the present invention proposes a kind of backlight module, comprises light source, light guide plate and reflectance coating.Wherein, light guide plate has incident light plane, the first emergent light face and the second emergent light face, and the light that light source sent is injected light guide plate by this incident light plane exactly, again by the first emergent light face and the output of the second emergent light face.Reflectance coating is suitable for moving between the primary importance and the second place, and when reflectance coating is positioned at primary importance, the first emergent light face of the contiguous light guide plate of reflectance coating is so that in the light reflected back light guide plate that the first emergent light face is exported, exported by the second emergent light face again.Otherwise when reflectance coating was positioned at the second place, reflectance coating can be exported by the first emergent light face with the light that allows to inject light guide plate away from the first emergent light face of light guide plate.
The present invention also proposes a kind of mobile phone with illumination functions, and it is made of body and above-mentioned backlight module.Body has display panel and illumination holes, and the first emergent light face of the light guide plate in the backlight module is corresponding to this display panel, and the second emergent light face is then corresponding to this illumination holes.
The present invention also proposes a kind of LCD, mainly is made of housing, display panels and above-mentioned backlight module.Wherein, display panels and backlight module all are disposed in the housing, and housing has illumination holes and display panel mouth, and the second emergent light face of light guide plate is corresponding to this illumination holes.This display panels is positioned at the top of the first emergent light face of light guide plate, and the display panel mouth of housing promptly is to expose this display panels.
In an embodiment of the present invention, above-mentioned backlight module also comprises first transmission shaft, and it combines with above-mentioned reflectance coating, is used to drive this reflectance coating and moves between the primary importance and the second place.And this first transmission shaft for example is positioned at the second place, and is suitable for this reflectance coating is reeled thereon.
In an embodiment of the present invention, above-mentioned backlight module also comprises guide rail, and the first emergent light face top that it is arranged at light guide plate is used for the direct reflected film to primary importance.
In an embodiment of the present invention, above-mentioned backlight module also comprises diffusion barrier, and the first emergent light face top that it is arranged at light guide plate is used for the light scatter that the first emergent light face is exported is become uniform surface light source.
In an embodiment of the present invention, above-mentioned backlight module also comprises diffusion barrier, and this diffusion barrier combines with above-mentioned reflectance coating.When reflectance coating moves to the second place, reflectance coating will drive the top of this diffusion barrier to the first emergent light face of light guide plate simultaneously.
In an embodiment of the present invention, above-mentioned backlight module also comprises collective optics, is disposed at the place ahead of the second emergent light face of light guide plate, is used to converge the light by the output of the second emergent light face.
Backlight module of the present invention has two emergent light faces, and the user can select the outbound course of the light that backlight module provides according to its needs.Therefore, when backlight module of the present invention is applied to mobile phone or LCD, not only can provide the display panels show image required light, illuminating light can also be provided, and then make mobile phone or LCD have illumination functions.
For making advantage of the present invention and the spirit can be further revealed, elaborate below with reference to accompanying drawing.
Description of drawings
Figure 1A is the diagrammatic cross-section of backlight module in the first embodiment of the present invention;
When Figure 1B is positioned at the second place for reflectance coating, the diagrammatic cross-section of the backlight module of Figure 1A;
Fig. 2 A is the diagrammatic cross-section of backlight module in the second embodiment of the present invention;
Fig. 2 B is a reflectance coating when being positioned at the second place, the diagrammatic cross-section of the backlight module of Fig. 2 A;
Fig. 3 is for having the synoptic diagram of the mobile phone of illumination functions in the embodiments of the invention; And
Fig. 4 is the synoptic diagram of LCD in the embodiments of the invention.
Embodiment
Figure 1A is the diagrammatic cross-section of backlight module in the first embodiment of the present invention.With reference to Figure 1A, backlight module 100 mainly is made of light source 110, light guide plate 120 and reflectance coating 130.Wherein, light guide plate 120 has incident light plane 122, the first emergent light face 124 and the second emergent light face 126.The light that light source 110 is sent is injected in the light guide plate 120 by incident light plane 122, injects to the outside of light guide plate 120 again by the first emergent light face 124 or the second emergent light face 126.Those skilled in the art can know that backlight module 100 is a side incident light formula backlight module, that is to say, light source 110 is disposed at by the side of incident light plane 122 of light guide plate 120.
Refer again to Figure 1A, reflectance coating 130 is suitable for moving between the primary importance and the second place.Specifically, when reflectance coating 130 is positioned at primary importance, the first emergent light face 124 of reflectance coating 130 contiguous light guide plate 120, in the present embodiment, this moment, reflectance coating 130 was positioned at the top of the first emergent light face 124, with will be from the light reflected back light guide plate 120 that the first emergent light face 124 penetrates.
In addition, light guide plate 120 has the reflecting surface 128 with respect to the first emergent light face 124.Hence one can see that, and when reflectance coating 130 was positioned at primary importance, light was after injecting light guide plate 120 by incident light plane 122, and the reflecting surface 128 of can be reflected film 130 and light guide plate 120 reflects, and from 126 outgoing of the second emergent light face.In the present embodiment, the second emergent light face, 126 the place aheads are provided with collective optics 140, so that concentrate on equidirectional outgoing from the light of the second emergent light face, 126 outgoing.Wherein, collective optics 140 can be brightening piece (Brightness Enhancement Film, BEF, brightness enhancement film) or prismatic lens, can effectively utilize light, promotes overall brightness and uniformity coefficient, to reach splendid brightening effect.
What deserves to be mentioned is, those skilled in the art will be appreciated that, in order to improve the light utilization efficiency of light source 110, except the bottom surface of light guide plate 120 with respect to the first emergent light face 124 is designed to have for the reflectivity, also can below light guide plate, dispose the reflector plate (not shown), to reach identical effect.
When Figure 1B is positioned at the second place for reflectance coating, the diagrammatic cross-section of the backlight module of Figure 1A.With reference to Figure 1B, when reflectance coating 130 was positioned at the second place, reflectance coating 130 was away from the first emergent light face 124 of light guide plate 120, so that the light in the light guide plate 120 is by 124 outgoing of the first emergent light face.And, present embodiment also is provided with diffusion barrier 170 and other blooming piece 180 (as brightening piece, prismatic lens etc.) above the first emergent light face 124 of light guide plate 120, when reflectance coating 130 is positioned at the second place, the light that light source 110 is provided just can be from the first emergent light face, 124 outgoing of light guide plate 120, and order is by diffusion barrier 170 and these blooming pieces 180.
Specifically, present embodiment drives reflectance coating 130 by first transmission shaft 150 and moves between the primary importance and the second place, and this first transmission shaft 150 promptly is to be positioned at the second place.Specifically, if wish that light in the light guide plate 120 by 124 outgoing of the first emergent light face, then can make reflectance coating 130 be positioned at the second place, reflectance coating 130 is wound on first transmission shaft 150.
Otherwise, if wish that light in the light guide plate 120 is by the second emergent light face outgoing, then can drive first transmission shaft 150 begins to rotate, move to primary importance so that it drives reflectance coating 130, and the reflectance coating 130 of present embodiment moves to primary importance by the guiding of one group of guide rail 160 from the second place.Wherein, guide rail 160 is arranged on the top of the first emergent light face 124 of light guide plate 120.Certainly, the reflectance coating 130 of present embodiment also is to move to the second place by the drive of first transmission shaft 150 by primary importance.
Fig. 2 A is the diagrammatic cross-section of backlight module in the second embodiment of the present invention.Fig. 2 B is a reflectance coating when being positioned at the second place, the diagrammatic cross-section of the backlight module of Fig. 2 A.With reference to Fig. 2 A and Fig. 2 B, in backlight module 200, diffusion barrier 270 also can combine with reflectance coating 230 and become same layer film, to reduce the integral thickness of backlight module 200.Shown in Fig. 2 A, when reflectance coating 230 was positioned at the first emergent light face, 124 tops (primary importance) of light guide plate 120, diffusion barrier 270 was involved in second transmission shaft 155; Shown in Fig. 2 B, when reflectance coating 230 was involved in first transmission shaft 150 (second place), 270 of diffusion barriers were positioned at the first emergent light face, 124 tops of light guide plate 120.
What deserves to be mentioned is, for the diffusion barrier 270 that makes reflectance coating 230 and combine with it successfully moves between the primary importance and the second place, present embodiment respectively is provided with first power wheel 150 and second transmission shaft 155 respectively in incident light plane 122 and the second emergent light face, 126 these both sides near light guide plate 120.Wherein, when reflectance coating 230 was positioned at primary importance, diffusion barrier 270 was wound on second transmission shaft 155; When diffusion barrier 270 was positioned at primary importance, reflectance coating then was wound on first transmission shaft 150.
Certainly, the present invention does not limit the blooming piece that combines with reflectance coating 230 and only is diffusion barrier 270, and in other embodiments, reflectance coating 230 also can be to combine with other blooming piece (as brightening piece, prismatic lens etc.).
Backlight module of the present invention can be applicable in the mobile phone, so that it has illumination functions.Hereinafter will describe in detail for example.
Fig. 3 is for having the synoptic diagram of the mobile phone of illumination functions in the embodiments of the invention.With reference to Figure 1A and Fig. 3, mobile phone 300 comprises body 310 and backlight module 100 (not shown in Fig. 3).Though it should be noted that present embodiment is that example is done explanation with backlight module 100, in fact, the backlight module in the mobile phone 300 also can be the backlight module 200 of Fig. 2, or previously described arbitrary backlight module.
Refer again to Figure 1A, Fig. 2 A and Fig. 3, so-called herein body 310 comprises display panel 312, illumination holes 314 and button 316 etc., and backlight module is positioned at display panel 312 belows, and the first emergent light face 124 of light guide plate 120 corresponding to 126 in display panel 312, the second emergent light faces corresponding to illumination holes 314.First transmission shaft 150 and second transmission shaft 155 are positioned at this display panel about in the of 312 both sides, and extend in this mobile phone body 310.Hence one can see that, when reflectance coating 130,230 is positioned at primary importance, the light that light source 110 is provided is after injecting light guide plate 120 by incident light plane 122, the reflecting surface 128 of film 130,230 and the light guide plate 120 of can being reflected reflects, and from 126 outgoing of the second emergent light face, and after passing through collective optics 140, from illumination holes 314 outgoing.In other words, this moment, backlight module 100 can provide illumination required light.
With reference to Figure 1B, Fig. 2 B and Fig. 3, when reflectance coating 130,230 is positioned at the second place, the light that light source 110 is provided will be by 124 outgoing of the first emergent light face, to provide display panel 312 show images required light after injecting light guide plate 120 by incident light plane 122.
Described as preamble, reflectance coating 130,230 passes through the drive of first transmission shaft 150, and moves between the primary importance and the second place.It should be noted that first transmission shaft 150 for example drives by the electromagnetic shaker (not shown) in the body 310, and electromagnetic shaker described herein, the device of vibration function is provided provide in the promptly general mobile phone.Therefore, when the user wishes to utilize mobile phone 300 that the light that throws light on required is provided, but user's input instruction begins to rotate to drive first transmission shaft 150, and reflectance coating 130,230 is moved to primary importance to mobile phone 300.It should be noted that, because when reflectance coating 130,230 is positioned at primary importance, the light that light source 110 is provided can't be incident upon display panel 312, therefore when desire is come operating handset 300 by display panel 312 shown images, then need drive first transmission shaft 150 again, so that reflectance coating 130,230 is moved to the second place from primary importance.
In addition, backlight module of the present invention also can be applicable in the clamshell phone, is not limited to the mobile phone pattern that icon illustrated of the foregoing description.
Similarly, backlight module of the present invention also can be applicable in the LCD, so that LCD has illumination functions.Fig. 4 is the synoptic diagram of LCD in the embodiments of the invention.With reference to Fig. 4, LCD 400 is made of housing 410, display panel 420 and above-mentioned arbitrary backlight module (not shown, hereinafter the backlight module 100,200 with Figure 1A or Fig. 2 A explains by example).With reference to Figure 1A, Fig. 2 A and Fig. 4, display panel 420 and backlight module 100,200 are disposed in the housing, and display panel 420 is positioned at the top of the first emergent light face 124 of light guide plate 120 simultaneously.
As the mobile phone of Fig. 3, the LCD of present embodiment also has the function of illumination, and its detailed start principle repeats no more as mentioned before herein.
In sum, backlight module of the present invention changes the exit direction of light by the reflectance coating that is positioned at the light guide plate top, and then makes mobile phone, LCD or other device of using this backlight module all can have the function of illumination.In other words, adopt devices such as the mobile phone of backlight module of the present invention or LCD can directly utilize backlight module to provide illumination required light, illuminating light source need not additionally be set again, therefore low cost of manufacture not only, the function that also helps whole device is integrated.
The above utilizes different embodiment to describe the present invention in detail, and it is not limited to scope of the present invention, and it should be understood by those skilled in the art that and can carry out suitable modification and without departing from the spirit or scope of the invention.
Claims (21)
1. backlight module comprises:
Light guide plate has the first emergent light face, second emergent light face and the incident light plane;
Light source can emit beam, and makes described light inject described light guide plate by described incident light plane, and described light is exported by described first emergent light face and the described second emergent light face; And
Reflectance coating, can between the primary importance and the second place, move, wherein, when described reflectance coating was positioned at described primary importance, the contiguous described first emergent light face of described reflectance coating was in the described light guide plate of light reflected back that the described first emergent light face is exported, again by described second emergent light face output, and when described reflectance coating was positioned at the described second place, described reflectance coating was exported by the described first emergent light face with the light that allows to inject described light guide plate away from the described first emergent light face.
2. backlight module according to claim 1 also comprises first transmission shaft, combine with described reflectance coating, and it is mobile between the described primary importance and the described second place to drive described reflectance coating.
3. backlight module according to claim 2, wherein, described first transmission shaft is positioned at the described second place, and described reflectance coating can be wound on described first transmission shaft.
4. backlight module according to claim 1 also comprises guide rail, is arranged at described first emergent light face top, is used to guide described reflectance coating to described primary importance.
5. backlight module according to claim 1 also comprises diffusion barrier, and described diffusion barrier is arranged on the described first emergent light face.
6. backlight module according to claim 1 also comprises diffusion barrier, combines with described reflectance coating, and when described reflectance coating moves to the described second place, described reflectance coating will drive described diffusion barrier simultaneously to the described first emergent light face.
7. backlight module according to claim 1 also comprises collective optics, and described second emergent light that is disposed at described light guide plate is square in front.
8. mobile phone with illumination functions comprises:
Body has display panel and illumination holes;
Backlight module is arranged at described body interior, and described backlight module comprises:
Light guide plate has the first emergent light face, second emergent light face and the incident light plane, and wherein, the described first emergent light face is corresponding to described display panel, and the described second emergent light face is corresponding to described illumination holes;
Light source can emit beam, and makes described light inject described light guide plate by described incident light plane, and described light is exported by described first emergent light face and the described second emergent light face; And
Reflectance coating, can between the primary importance and the second place, move, wherein, when described reflectance coating was positioned at described primary importance, the contiguous described first emergent light face of described reflectance coating was in the described light guide plate of light reflected back that the described first emergent light face is exported, again by described second emergent light face output, and when described reflectance coating was positioned at the described second place, described reflectance coating was exported by the described first emergent light face with the light that allows to inject described light guide plate away from the described first emergent light face.
9. mobile phone according to claim 8 also comprises collective optics, and described second emergent light that is disposed at described light guide plate is square in front.
10. mobile phone according to claim 8, wherein, described backlight module also comprises first transmission shaft, combine with described reflectance coating, and it is mobile between the described primary importance and the described second place to drive described reflectance coating.
11. mobile phone according to claim 10, wherein, described first transmission shaft is positioned at the described second place, and described reflectance coating can be wound on described first transmission shaft.
12. mobile phone according to claim 8, wherein, described backlight module also comprises guide rail, is arranged at described first emergent light face top, is used to guide described reflectance coating to described primary importance.
13. mobile phone according to claim 8, wherein, described backlight module also comprises diffusion barrier, and described diffusion barrier is arranged on the described first emergent light face.
14. mobile phone according to claim 8, wherein, described backlight module also comprises diffusion barrier, combines with described reflectance coating, when described reflectance coating moves to the described second place, described reflectance coating will drive described diffusion barrier simultaneously to the described first emergent light face.
15. a LCD comprises:
Housing has illumination holes and display panel mouth;
Backlight module is disposed in the described housing, and described backlight module comprises:
Light guide plate has the first emergent light face, second emergent light face and the incident light plane, and wherein, the described second emergent light face is corresponding to the described illumination holes of described housing; Light source can emit beam, and makes described light inject described light guide plate by described incident light plane, and described light is exported by described first emergent light face and the described second emergent light face;
Reflectance coating, can between the primary importance and the second place, move, wherein, when described reflectance coating was positioned at described primary importance, the contiguous described first emergent light face of described reflectance coating was in the described light guide plate of light reflected back that the described first emergent light face is exported, again by described second emergent light face output, and when described reflectance coating was positioned at the described second place, described reflectance coating was exported by the described first emergent light face with the light that allows to inject described light guide plate away from the described first emergent light face; And
Display panels is disposed in the described housing, and is positioned at the described first emergent light face top of described light guide plate, and the described display panel mouth of described housing exposes described display panels.
16. LCD according to claim 15, wherein, described backlight module also comprises first transmission shaft, combine with described reflectance coating, and it is mobile between the described primary importance and the described second place to drive described reflectance coating.
17. LCD according to claim 16, wherein, described first transmission shaft is positioned at the described second place, and described reflectance coating can be wound on described first transmission shaft.
18. LCD according to claim 15, wherein, described backlight module also comprises guide rail, is arranged at described first emergent light face top, is used to guide described reflectance coating to described primary importance.
19. LCD according to claim 15, wherein, described backlight module also comprises diffusion barrier, and described diffusion barrier is located on the described first emergent light face.
20. LCD according to claim 15, wherein, described backlight module also comprises diffusion barrier, combines with described reflectance coating, when described reflectance coating moves to the described second place, described reflectance coating will drive described diffusion barrier simultaneously to the described first emergent light face.
21. LCD according to claim 15, wherein, described backlight module also comprises collective optics, and described second emergent light that is disposed at described light guide plate is square in front.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610098844XA CN101105600A (en) | 2006-07-13 | 2006-07-13 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610098844XA CN101105600A (en) | 2006-07-13 | 2006-07-13 | Backlight module |
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| Publication Number | Publication Date |
|---|---|
| CN101105600A true CN101105600A (en) | 2008-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610098844XA Pending CN101105600A (en) | 2006-07-13 | 2006-07-13 | Backlight module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101960467A (en) * | 2008-02-29 | 2011-01-26 | 松下电器产业株式会社 | Light guiding device, reader/writer device for noncontact communication medium, and electronic apparatus |
| CN104896382A (en) * | 2015-06-18 | 2015-09-09 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device comprising same |
| CN107304985A (en) * | 2016-04-21 | 2017-10-31 | 苏州向隆塑胶有限公司 | The illuminator of adjustable double-side light extraction |
-
2006
- 2006-07-13 CN CNA200610098844XA patent/CN101105600A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101960467A (en) * | 2008-02-29 | 2011-01-26 | 松下电器产业株式会社 | Light guiding device, reader/writer device for noncontact communication medium, and electronic apparatus |
| US8348156B2 (en) | 2008-02-29 | 2013-01-08 | Panasonic Corporation | Light guiding device, reader/writer device for noncontact communication medium, and electronic apparatus |
| US8567666B2 (en) | 2008-02-29 | 2013-10-29 | Panasonic Corporation | Light guiding device, reader/writer device for noncontact communication medium, and electronic apparatus |
| CN104896382A (en) * | 2015-06-18 | 2015-09-09 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device comprising same |
| WO2016201713A1 (en) * | 2015-06-18 | 2016-12-22 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device comprising same |
| US20170146725A1 (en) * | 2015-06-18 | 2017-05-25 | Shenzhen China Star Optoelectronics Technology Co. Ltd. | Backlight module and liquid crystal display device comprising the backlight module |
| US9885823B2 (en) * | 2015-06-18 | 2018-02-06 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and liquid crystal display device comprising the backlight module |
| CN107304985A (en) * | 2016-04-21 | 2017-10-31 | 苏州向隆塑胶有限公司 | The illuminator of adjustable double-side light extraction |
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