CN103115281A - Backlight module unit - Google Patents
Backlight module unit Download PDFInfo
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- CN103115281A CN103115281A CN2011103624696A CN201110362469A CN103115281A CN 103115281 A CN103115281 A CN 103115281A CN 2011103624696 A CN2011103624696 A CN 2011103624696A CN 201110362469 A CN201110362469 A CN 201110362469A CN 103115281 A CN103115281 A CN 103115281A
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- backlight module
- hole
- reflector plate
- irradiation unit
- light source
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Abstract
The invention discloses a backlight module unit. The backlight module unit comprises at least an irradiation unit, a reflection element and a light pervious element. The reflection element and the light pervious element are oppositely arranged. The irradiation unit is arranged on a side edge position between the reflection element and the light pervious element in a side direction. The light pervious element comprises a diffuser plate and a reflector plate which is arranged on the diffuser plate and close to one side of the reflection element. A plurality of through holes with different sizes and for light through are formed in the reflector plate. Compared with the prior art, due to the fact that the reflector plate is arranged on the diffuser plate, and the through holes with different sizes are formed in the reflector plate to prevent the phenomenon that bright spots or fireflies occur in areas close to the irradiation unit, and therefore the backlight module unit radiates light evenly.
Description
Technical field
The present invention relates to the backlight lighting field, relate in particular to the side-mounted backlight module that a kind of light source is positioned at lateral margin.
Background technology
Backlight is in field extensive application such as liquid crystal display (LCD), advertising lamp box, indoor and outdoor lighting.Place the difference in orientation according to light source, backlight can be divided into straight-down negative and side-mounted two types.
Direct-light-type backlight is also referred to as direct-lit backlight, refers to light source is placed on the below of liquid crystal panel, pervasion component or lamp house cloth, direct illumination.Light is from light source, penetrates through the reflector reflection such as fluorescent tube, light emitting diode (LED) etc., upwards penetrates from the front behind pervasion component, illuminates target with the form of area source.Because the light source accommodation space is larger, can use the more light source of number according to the size of backlight.Its advantage is that high brightness, visual angle are good, light utilization efficiency is relatively high, simple in structure etc., but has vertically thick, the shortcomings such as size is large, difficult mixed light of system, therefore is mainly used in the less demanding LCD TV of compactedness, thicker advertising lamp box and ceiling light.
Side-mounted backlight refers to that light source places a side of LGP, is adjusted to the targets such as liquid crystal panel by LGP Uniform Illumination is provided.The micro structure array that LGP utilizes its bottom surface is converted to spot light or the line source of incident from the area source of LGP upper surface outgoing, then finally illuminates the targets such as liquid crystal panel, lamp house cloth through the acting in conjunction of other optics.This type of backlight is widely used in the liquid crystal display of small-medium size, such as mobile phone, notebook computer, Vehicular display device, Ultrathin advertisement lamp house etc.This backlight is relatively thin.LGP is that weight is larger in this type of backlight, the important spare part that cost is higher, and the processing and fabricating program is complicated, and is dumb.Because the LGP refractive index is higher, when adopting LED to be light source, in the zone near LED bright spot or perhaps firefly phenomenon appear easily, cause uniformity decreases.The mixed light deficiency often also is a large deficiency of side-mounted backlight.
In view of the above problems, be necessary to provide a kind of backlight module that can overcome above-mentioned bright spot or firefly phenomenon.
Summary of the invention
For the deficiencies in the prior art, the technical problem that the present invention solves provides a kind of bright dipping evenly to overcome the backlight module of bright spot or firefly phenomenon.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of backlight module, comprise: at least one irradiation unit, reflecting member and transmissive member, described reflecting member and transmissive member are oppositely arranged, the laterally disposed lateral margin position between reflecting member and transmissive member of described irradiation unit, described transmissive member comprises diffuser plate and is arranged at diffuser plate near the reflector plate of a side of reflecting member, and described reflector plate is provided with some through holes that see through for light not of uniform size.
Further, described irradiation unit comprises light source and reflector.
Further, described backlight module has a described irradiation unit, through-hole diameter on the described reflector plate increases along with the increase of distance between through hole position and the light source, and the spacing between the described through hole reduces along with the increase of distance between through hole and the light source.
Further, described backlight module has two irradiation units, described irradiation unit is oppositely arranged on the position, both sides between transmissive member and the reflecting member, the diameter of described through hole is by increasing gradually near two side direction of light source are middle, and spacing diminishes in the middle of aforementioned two side direction gradually between the described through hole.
Further, described backlight module has four described irradiation units, described irradiation unit be arranged between transmissive member and the reflecting member around, the diameter of the through hole on the described reflector plate from around increase gradually to the centre, between the described through hole spacing from around diminish gradually to the centre.
Further, the diameter of the through hole on the described reflector plate is between 10 microns to 2 millimeters.
Further, the diameter of the through hole on the described reflector plate is between 20 microns to 1 millimeter.
Further, the reflecting rate of described reflector plate is greater than 95%.
Further, described reflector plate is the white reflection sheet of scattered reflection type.
Further, described reflector plate is the silvery reflection sheet of mirror-reflection.
Further, the thickness of described diffuser plate between 1mm to 2mm, mist degree greater than 90%, light transmittance is greater than 50%.
Further, described diffuser plate is the lower clear sheet of mist degree.
Further, described reflecting member is the white reflection sheet of diffuse reflection type or the silvery reflection sheet of mirror-reflection.
Further, be provided with the printing net-point that prints by method for printing screen on the described reflecting member.
Further, described backlight module has the structure of hollow.
The invention has the beneficial effects as follows: backlight module of the present invention is by arranging reflector plate at diffuser plate, and through hole not of uniform size is set on this reflector plate bright spot or perhaps firefly phenomenon occurs with the zone that prevents close irradiation unit, and then so that the bright dipping of this kind backlight module is even.
Description of drawings
Figure 1 shows that the structural representation of backlight module the first preferred embodiments of the present invention.
Figure 2 shows that the schematic diagram of the reflector plate on the backlight module among Fig. 1.
Figure 3 shows that the schematic diagram of the reflector plate in backlight module the second preferred embodiments of the present invention.
Figure 4 shows that the schematic diagram of the reflector plate in backlight module the 3rd preferred embodiments of the present invention.
The specific embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Please refer to the drawing 1 is depicted as the first preferred embodiments of backlight module of the present invention, and this backlight module 100 comprises irradiation unit 1, reflecting member 2 and transmissive member 3.
Described irradiation unit 1 comprises reflector 11 and light source 12, and described reflector 11 is spill, and described light source 12 is positioned at the centre of described spill reflector 11.
Described reflecting member 2 and described transmissive member 3 opposing parallel settings, described irradiation unit 1 laterally disposed lateral margin position between described reflecting member 2 and described transmissive member 3.Form the optical cavity of a hollow type between described irradiation unit 1, reflecting member 2 and the transmissive member 3, reflecting member 2 and transmissive member 3 are respectively as the upper and lower surface of this optical cavity.The light that described light source 12 sends reaches transmissive member 3 through the reflection of reflector 11, is perhaps reflexed to first on the reflecting member 2 by reflector 11, is reflected member 2 again and reflexes to transmissive member 3.
The light of described backlight module 100 finally penetrates from transmissive member 3, to play the effect of back lighting.In back lighting, the uniformity of light intensity has vital effect for illuminating effect.The light distribution of the light that therefore, sends from described transmissive member 3 must be evenly.
Shown in please refer to the drawing 1, if 1 pair of transmissive member of irradiation unit 3 realizes Uniform Illumination, the essentially identical luminous energy quantity that need in the equal area of transmissive member 3, distribute, namely illuminance is basic identical.Yet, for this side irradiation unit 1 as shown in Figure 1, even if the light intensity of light source 12 on each angle of divergence alpha direction is fully uniformly, on the angle of divergence alpha scope of light source 12 the area of corresponding transmissive member 3 also be inhomogeneous, far away apart from light source 12, the local angular range of the angle of divergence alpha of the corresponding light source 12 of the equal area of transmissive member 3 is less.
For the light that penetrates from described transmissive member 3 is evenly distributed, the transmissive member 3 in the present embodiment is made of diffuser plate 31 and the reflector plate 32 that is arranged at close reflecting member 2 one sides on this diffuser plate 31, and described reflector plate 32 can reflection ray.
Join reflector plate 32 schematic diagrames in the first preferred embodiments that Figure 2 shows that backlight module of the present invention.Described backlight module 100 is provided with a described irradiation unit 1.Described reflector plate 32 is provided with some through holes 321, and described through hole 321 is for the light transmission that sends from described light source 12.Through hole 321 diameters on the described reflector plate 32 increase along with the increase of distance between through hole 321 positions and the light source 12, and the spacing between the described through hole 321 reduces along with the increase of distance between through hole 321 and the light source 12.Owing to reflexing to described reflector plate 32 or reflex to the light intensity that reflexes to again described reflector plate 32 on the described reflecting member 2 through described reflector 11 first through described reflector 11, the light that sends from described light source 12 successively decreases gradually to the side away from described light source 12 Zi the side near described light source 12, and the diameter of described through hole 321 increases to the side away from described light source 12 gradually from the side of described reflector plate 32 near described light source 12, spacing between the through hole 321 reduces gradually, therefore can be so that transmissive member 3 be less near the regional light transmittance of light source, and it is larger away from the regional light transmittance of light source, the light transmittance in the zone a little less than namely the size by described through hole 321 and density setting reduce the light transmittance in the strong zone of illumination and strengthen illumination evenly distributes thereby reach the light that penetrates from described diffuser plate 31.
Please refer to the drawing 3 is depicted as reflector plate 33 schematic diagrames in the second preferred embodiments of backlight module of the present invention.In the present embodiment, the backlight module (not shown) that is provided with this kind reflector plate 33 is provided with two irradiation units, laterally disposed both sides in the backlight module optical cavity, described irradiation unit opposing parallel ground.In the present embodiment, because both sides are provided with light source, the light intensity that therefore is radiated on the reflector plate 33 successively decreases in the middle of two side direction near light source gradually.Described reflector plate 33 is provided with through hole not of uniform size 331, the diameter of described through hole 331 increases near two side direction of light source are middle gradually from described reflector plate 33, spacing between the through hole 331 reduces in the middle of aforementioned two side direction gradually, like this can so that in the backlight module transmissive member less near the regional light transmittance of light source, and it is larger away from the regional light transmittance of light source, namely reduce the light transmittance of two side areas by described through hole 331 and strengthen the light transmittance of zone line, evenly distribute thereby reach the light that penetrates from described diffuser plate 31.
Please refer to the drawing 4 is depicted as reflector plate 34 schematic diagrames in the 3rd preferred embodiments of backlight module of the present invention.In the present embodiment, the backlight module (not shown) that is provided with this kind reflector plate 34 is provided with four irradiation units, lateral margin around the laterally disposed optical cavity at backlight module of described irradiation unit.In the present embodiment, owing to be provided with light source all around, the light intensity that therefore is radiated on the reflector plate 34 successively decreases to the centre certainly all around gradually.Described reflector plate 34 is provided with through hole not of uniform size 341, the diameter of described through hole 341 increases gradually to the centre around described reflector plate 34, and the spacing between the through hole 341 is from reducing gradually to the centre all around, like this can so that in the backlight module transmissive member less near the regional light transmittance of light source, and it is larger away from the regional light transmittance of light source, namely the size by described through hole 341 or the spacing size between the through hole 341 reduce the light transmittance of peripheral regions and strengthen the light transmittance of zone line, evenly distribute thereby reach the light that penetrates from described diffuser plate 31.
Among three embodiment mentioned above, described reflector plate 32,33,34 reflecting rate are greater than 95%, and described reflector plate 32,33,34 can be the white reflection sheet of diffuse reflection type, can also be the silvery reflection sheet of mirror-reflection.Through hole 321,331 on the described reflector plate 32,33,34,341 diameters are preferentially selected 20 microns to 1 millimeter scope between 10 microns and 2 millimeters.Be provided with the thickness of above-mentioned reflector plate 32,33,34 diffuser plate between 1 millimeter to 2 millimeters, mist degree is greater than 90%, and light transmittance is greater than 50%.When the through hole 321,331 on the described reflector plate 32,33,34,341 diameters little during to the human eye indistinguishable, described diffuser plate can be the very low clear sheet of mist degree, and described clear sheet is the clear sheets such as Merlon, polymethyl methacrylate, polystyrene plastics, glass.In addition, the white reflection sheet that described reflecting member 2 can be the diffuse reflection type can also be the silvery reflection sheet of mirror-reflection; Simultaneously, reflecting member 2 can be by method printing net-points such as serigraphys, in order to further modulate the light-emitting uniformity of backlight module.
In above embodiment, described backlight module 100 has adopted respectively one, two, four irradiation units 1, but in other embodiments, backlight module 100 of the present invention can adopt a plurality of irradiation units 1, and the quantity of irradiation unit 1 is selected and can be determined according to length and the width of backlight module.Through hole 321,331 on the reflector plate 32,33,34,341 diameter can be determined according to the intensity of irradiation on reflector plate 32,33,34 that irradiation unit 1 sends: the zone that light intensity is strong, through hole 321,331,341 diameter are little, and the spacing between the through hole 321,331,341 is large; The zone that light intensity is weak, through hole 321,331,341 diameter are large, and the spacing between the through hole 321,331,341 is little.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (15)
1. backlight module, comprise: at least one irradiation unit, reflecting member and transmissive member, described reflecting member and transmissive member are oppositely arranged, the laterally disposed lateral margin position between reflecting member and transmissive member of described irradiation unit, it is characterized in that: described transmissive member comprises diffuser plate and is arranged at diffuser plate near the reflector plate of a side of reflecting member, and described reflector plate is provided with some through holes that see through for light not of uniform size.
2. backlight module as claimed in claim 1, it is characterized in that: described irradiation unit comprises light source and reflector.
3. backlight module as claimed in claim 2, it is characterized in that: described backlight module has a described irradiation unit, through-hole diameter on the described reflector plate increases along with the increase of distance between through hole position and the light source, and the spacing between the described through hole reduces along with the increase of distance between through hole and the light source.
4. backlight module as claimed in claim 2, it is characterized in that: described backlight module has two irradiation units, described irradiation unit is oppositely arranged on the position, both sides between transmissive member and the reflecting member, the diameter of described through hole is by increasing gradually near two side direction of light source are middle, and spacing diminishes in the middle of aforementioned two side direction gradually between the described through hole.
5. backlight module as claimed in claim 2, it is characterized in that: described backlight module has four described irradiation units, described irradiation unit be arranged between transmissive member and the reflecting member around, the diameter of the through hole on the described reflector plate is from increasing gradually to the centre all around, and spacing is from diminishing gradually to the centre all around between the described through hole.
6. backlight module as claimed in claim 1, it is characterized in that: the diameter of the through hole on the described reflector plate is between 10 microns to 2 millimeters.
7. backlight module as claimed in claim 6, it is characterized in that: the diameter of the through hole on the described reflector plate is between 20 microns to 1 millimeter.
8. backlight module as claimed in claim 1, it is characterized in that: the reflecting rate of described reflector plate is greater than 95%.
9. backlight module as claimed in claim 8, it is characterized in that: described reflector plate is the white reflection sheet of scattered reflection type.
10. backlight module as claimed in claim 8, it is characterized in that: described reflector plate is the silvery reflection sheet of mirror-reflection.
11. the described backlight module of any one as in the claim 1 to 10 is characterized in that: the thickness of described diffuser plate between 1mm to 2mm, mist degree greater than 90%, light transmittance is greater than 50%.
12. backlight module as claimed in claim 1 is characterized in that: described diffuser plate is the lower clear sheet of mist degree.
13. backlight module as claimed in claim 1 is characterized in that: described reflecting member is the white reflection sheet of diffuse reflection type or the silvery reflection sheet of mirror-reflection.
14. backlight module as claimed in claim 1 is characterized in that: be provided with the printing net-point by the method for printing screen printing on the described reflecting member.
15. backlight module as claimed in claim 1 is characterized in that: described backlight module has the structure of hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103624696A CN103115281A (en) | 2011-11-16 | 2011-11-16 | Backlight module unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103624696A CN103115281A (en) | 2011-11-16 | 2011-11-16 | Backlight module unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103115281A true CN103115281A (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103624696A Pending CN103115281A (en) | 2011-11-16 | 2011-11-16 | Backlight module unit |
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| CN (1) | CN103115281A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050121578A (en) * | 2004-06-22 | 2005-12-27 | 삼성전자주식회사 | Backlight unit |
| CN2802630Y (en) * | 2005-06-11 | 2006-08-02 | 王军 | Combined LED side backlight source |
| CN101858566A (en) * | 2010-04-21 | 2010-10-13 | 刘姝 | Light source reflector used in backlight component and backlight component thereof |
| JP2010272245A (en) * | 2009-05-19 | 2010-12-02 | Toshiba Corp | Backlight unit and liquid crystal display equipped with this |
| CN102112802A (en) * | 2008-08-06 | 2011-06-29 | Opto设计股份有限公司 | Light source device, lighting device, and display device |
-
2011
- 2011-11-16 CN CN2011103624696A patent/CN103115281A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050121578A (en) * | 2004-06-22 | 2005-12-27 | 삼성전자주식회사 | Backlight unit |
| CN2802630Y (en) * | 2005-06-11 | 2006-08-02 | 王军 | Combined LED side backlight source |
| CN102112802A (en) * | 2008-08-06 | 2011-06-29 | Opto设计股份有限公司 | Light source device, lighting device, and display device |
| JP2010272245A (en) * | 2009-05-19 | 2010-12-02 | Toshiba Corp | Backlight unit and liquid crystal display equipped with this |
| CN101858566A (en) * | 2010-04-21 | 2010-10-13 | 刘姝 | Light source reflector used in backlight component and backlight component thereof |
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Application publication date: 20130522 |