CN102927503A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN102927503A CN102927503A CN2012104475335A CN201210447533A CN102927503A CN 102927503 A CN102927503 A CN 102927503A CN 2012104475335 A CN2012104475335 A CN 2012104475335A CN 201210447533 A CN201210447533 A CN 201210447533A CN 102927503 A CN102927503 A CN 102927503A
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Abstract
The invention provides a backlight module which comprises a light emitting diode (LED) backlight source and a light guide plate, wherein the LED backlight source is arranged on one side of the light guide plate. The backlight module further comprises an optical thin film layer which includes a horizontal portion and a vertical portion, the horizontal portion is arranged on the upper surface of the light guide plate, the vertical portion is positioned on one side edge of the light guide plate, and the side edge faces the LED backlight source. The horizontal portion and the vertical portion of the optical thin film layer are separated by a fold line or a junction line, and a plurality of light guiding micro structures are arranged on the surface of the optical thin film layer. By arranging the optical thin film layer of prismatic lens or micro lens, the horizontal portion of the optical thin film layer is arranged on the upper surface of the light guide plate, and the vertical portion of the optical thin film layer is arranged on one side edge of the light guide plate, and therefore the hot spot phenomenon of the light input side of the light guide plate can be eliminated, and light input uniformity degree can be increased.
Description
Technical field
The present invention relates to a kind of liquid crystal panel, relate in particular to the backlight module of this liquid crystal panel.
Background technology
Current, area source is a kind of flat luminous source, is mainly used in the backlight of liquid crystal display (Liquid Crystal Display, LCD).Divide according to form, mainly comprise compact fluorescent lamp, cold light film, light emitting diode, wherein, have the advantages such as low-work voltage, low-power consumption and long service life because of light emitting diode and be widely used as backlight into the backlight module of liquid crystal display.
Take the LED-backlit source as example, backlight module mainly comprises diffusion sheet, prismatic lens, LGP, reflecting layer and LED-backlit source, wherein, the reflecting layer is positioned at the below of LGP, prismatic lens is positioned at the top of LGP, and diffusion sheet is positioned at the top of prismatic lens, and the LED-backlit source is arranged at a side of LGP.The light that LED produces is injected through the side of LGP, through all light processing on LGP surface and the light reflection in reflecting layer, sees through at last prismatic lens and diffusion sheet and produces planar light source again.Yet the light that produces owing to light emitting diode causes the light of injecting LGP both not exclusively also inhomogeneous for three-dimensional wide-angle is not parallel angle.
In addition, the LED-backlit source often adopts a plurality of LED to be arranged at intervals on the printed circuit board (PCB), and when the LED negligible amounts, the light inlet side at LGP produces focus (hot spot) phenomenon usually.Briefly, when the LED-backlit source is positioned at a side of LGP, because the angle of divergence of led light source is restricted, the light beam clear zone occurs in the zone of the close led light source of LGP, both reduced LGP and gone out uniformity of light, also affect optical effect backlight.In the prior art, common hot spot phenomenon solution roughly comprises: 1) in the part blacking near light source, a light absorption part; 2) when the leaded light net-pont design, the light source light inlet is not established the site, reduces reflection of light and refraction; 3) when design leaded light site, the light source light inlet is designed to zigzag (being also referred to as V-cut), increases the incidence angle of light source, makes light not be gathered into bright spot in the porch as far as possible, the dark space is also made moderate progress etc.But above-mentioned solution still can't produce a desired effect, and also comparatively difficult on the structure processing procedure for large-sized LGP.
In view of this, how to design the backlight module after a kind of improve, during the LGP of the light that makes the outgoing of LED-backlit source by this backlight module, both can effectively eliminate hot spot phenomenon, can increase again the uniformity of light inlet, be a problem needing to be resolved hurrily of person skilled in the industry.
Summary of the invention
Existing defects during for design of backlight module of the prior art the invention provides backlight module a kind of novelty, that can effectively improve hot spot phenomenon.
According to one aspect of the present invention, a kind of backlight module is provided, comprise a LED-backlit source and a LGP, this LED-backlit source is arranged at a side of this LGP, and this backlight module also comprises:
One optical thin film layer, comprise a horizontal part and a vertical portion, this horizontal position is in the upper surface of LGP, this vertical portion is positioned at a side of LGP, this side is towards the LED-backlit source, wherein, the horizontal part of this optical thin film layer and vertical portion adopt a broken line or a roulette to separate, and the surface of optical thin film layer has a plurality of leaded light micro-structurals.
Among the embodiment therein, the material of optical thin film layer is a prismatic lens (prism) or a lenticule (micro lens).
Among the embodiment therein, the leaded light micro-structural is V-shaped groove.Further, the LED-backlit source comprises a plurality of LED, and adjacent LED has a pitch, and the V-shaped groove of the vertical portion of this optical thin film layer and described pitch are complementary.
Among the embodiment therein, dispose the spacing of a patterning corresponding to the adjacent V-shaped groove of the vertical portion of this optical thin film layer of dark space.
According to another aspect of the present invention, a kind of backlight module is provided, comprise a LED-backlit source, a LGP and a reflector plate, this LED-backlit source is arranged at a side of LGP, and this reflector plate is arranged at the lower surface of LGP, and this backlight module also comprises:
One optical thin film layer, comprise one first horizontal part, one second horizontal part and connect the first horizontal part and the vertical portion of the second horizontal part, the first horizontal position is in the upper surface of LGP, the vertical portion is between a side of LED-backlit source and LGP, the second horizontal position is in the below of reflector plate, wherein, the surface of optical thin film layer has a plurality of leaded light micro-structurals.
Among the embodiment therein, the material of optical thin film layer is a prismatic lens (prism) or a lenticule (micro lens).
Among the embodiment therein, described side to described LGP is pasted by optical cement in the vertical portion of optical thin film layer.
Among the embodiment therein, reflector plate is against the vertical portion of optical thin film layer, and the second horizontal part of optical thin film layer is pasted lower surface to reflector plate by optical cement.
Among the embodiment therein, the first horizontal part of optical thin film layer, vertical portion and the second horizontal part separate by a broken line or a roulette.
Adopt backlight module of the present invention, by arranging such as prismatic lens or lenticular optical thin film layer, and the horizontal part of optical thin film layer is placed on the upper surface of LGP, the vertical portion of this optical thin film layer is placed on a side of LGP, by a broken line or a roulette the two is separated, when the surface of optical thin film layer is made as V-arrangement, can effectively improve the hot spot phenomenon of LGP light inlet side, also can increase the uniformity of light inlet.In addition, this backlight module also can reduce the usage quantity of LED backlight by optical thin film layer, reduces energy consumption, saves cost.
Description of drawings
The reader will become apparent various aspects of the present invention after the reference accompanying drawing has been read the specific embodiment of the present invention.Wherein,
Fig. 1 illustrates in the backlight module of prior art, and the LED-backlit source is at the light path schematic diagram of LGP light inlet side;
Fig. 2 illustrates in the backlight module of prior art, and LGP light inlet side adopts the light path schematic diagram of V-cut structural scattering LED-backlit source emergent ray;
Fig. 3 illustrates the structured flowchart according to the backlight module of one embodiment of the present invention;
Fig. 4 illustrates the top view of the backlight module of Fig. 3; And
Fig. 5 illustrates the structured flowchart according to the backlight module of another embodiment of the present invention.
The specific embodiment
For technology contents that the application is disclosed is more detailed and complete, can be with reference to accompanying drawing and following various specific embodiments of the present invention, identical mark represents same or analogous assembly in the accompanying drawing.Yet those of ordinary skill in the art should be appreciated that the embodiment that hereinafter provides limits the scope that the present invention is contained.In addition, accompanying drawing only is used for schematically being illustrated, and does not draw according to its life size.
With reference to the accompanying drawings, the specific embodiment of various aspects of the present invention is described in further detail.
Fig. 1 illustrates in the backlight module of prior art, and the LED-backlit source is at the light path schematic diagram of LGP light inlet side.
With reference to Fig. 1, this backlight module comprises that a LGP 10 and a plurality of LED(indicate with L1, L2, L3, L4 and L5 respectively).These LED are distributed on the printed circuit board (PCB) 20.As previously mentioned, owing to the light of LED outgoing is not parallel angle for three-dimensional wide-angle, it has an angle of scattering usually.For example, the emergent ray of light emitting diode L1 is distributed in the angle zone of S11 and S12, and the emergent ray of light emitting diode L2 is distributed in the angle zone of S21 and S22.
Thus, the emergent light of light emitting diode L1 and L2 all can arrive regional A1(and also can be described as " clear zone "), and the emergent light of light emitting diode L1 and L2 all can not reach regional A2(and can be described as " dark space " yet), because the less and regional A2 of regional A1 among Fig. 1 is larger, thereby this backlight module can produce significantly bright dark uneven phenomenon, that is, hot spot phenomenon affects the display performance of liquid crystal display.
Fig. 2 illustrates in the backlight module of prior art, and LGP light inlet side adopts the light path schematic diagram of V-cut structural scattering LED-backlit source emergent ray.
In order to solve the hot spot phenomenon among Fig. 1, a kind of technical scheme of traditional backlight module is to be, the side of LGP 10 towards the LED-backlit source is designed to V-cut structure 102(also can be described as V-shaped groove), utilize further the dispel the heat light scope of each LED outgoing of this V-cut structure 102.
Fig. 2 and Fig. 1 are compared, the emergent ray of the light emitting diode L1 of Fig. 2 is distributed in the angle zone of S11 and S12, and this angle zone is obviously greater than the corresponding region among Fig. 1, similarly, the emergent ray of light emitting diode L2 is distributed in the angle zone of S21 and S22, and this angle zone is also obviously greater than the corresponding region among Fig. 1.Therefore, the regional A1 of Fig. 2 becomes large compared to the regional A1 of Fig. 1, and the regional A2 of Fig. 2 has diminished compared to the regional A2 of Fig. 1, that is to say, the light scope of light emitting diode L1 and L2 outgoing is larger, and the dark space is less, thereby the light uniformity of LGP light inlet side has also obtained relative improvement.Yet, the especially larger-size LGP of LGP, the V-cut structure of its side directly adopts ejection formation or extrusion forming process comparatively difficult, thereby this backlight module still remains the professional and further improves on structure or processing procedure.
Fig. 3 illustrates the structured flowchart according to the backlight module of one embodiment of the present invention, and Fig. 4 illustrates the top view of the backlight module of Fig. 3.
With reference to Fig. 3 and Fig. 4, backlight module of the present invention comprises a LED-backlit source and a LGP 10, and this LED-backlit source is arranged at a side of LGP 10.The LED-backlit source comprises a plurality of LED, and such as LED L1, LED L2, these LED are arranged on the printed circuit board (PCB) 20.
It is pointed out that compared to prior art backlight module of the present invention need not for LGP 10 and designs the V-cut structure.Particularly, this backlight module also comprises an optical thin film layer 30.For example, the material of this optical thin film layer 30 is a prismatic lens (prism) or a lenticule (micro lens).This optical thin film layer 30 comprises a horizontal part 302 and a vertical portion 304.The horizontal part 302 of optical thin film layer 30 is positioned at the upper surface of LGP 10, and the vertical portion 304 of optical thin film layer 30 is positioned at a side of LGP 10, and this side is towards the LED-backlit source.And, the horizontal part 302 of this optical thin film layer 30 adopts a broken line 306(or a roulette with vertical portion 304) separate, that is, the horizontal part 302 of optical thin film layer 30 is one of the forming with vertical portion 304, then by folded optical thin layer 30 it is divided into horizontal part 302 and vertical portion 304.This optical thin film layer 30 surperficial V-shaped, that is, be provided with vee-cut G1 in horizontal part 302 and the vertical portion 304 of optical thin film layer 30.
Because its horizontal part 302 and vertical portion 304 adopt broken line or roulette to separate, thereby only need the light inlet side with vertical portion 304 bendings and coating LGP 10 when processing procedure, can reach the effect that improves and improve the light uniformity of LED-backlit source outgoing.In addition, because the V-cut structure of this optical thin film layer 30 is easier to make with respect to the V-cut structure of LGP 10, thereby also can eliminate the difficult problem that the large-size light-conducting plate of above-mentioned Fig. 2 faces when processing procedure.
In one embodiment, in manufacturing process, also can pre-set vertical portion 304 and the size of horizontal part 302, and reserved broken line or roulette 306, in order to its vertical portion 304 is bent to the light inlet side of LGP 10, and its horizontal part 302 is placed on the upper surface of LGP 10.
In one embodiment, adjacent light emitting diode L1 and L2 have a pitch (or being called spacing distance), and V-shaped groove G1 and this pitch of the vertical portion 304 of this optical thin film layer 30 are complementary, with the uniformity of further fine setting light inlet.In addition, also the adjacent V-shaped groove G1 corresponding to the vertical portion 304 of dark space A2 can be disposed the spacing of a patterning, for example, prismatic lens or lenticular V-shaped groove G1 be adopted certain density distribution rule, to regulate the light inlet uniformity of LGP 10.
Fig. 5 illustrates the structured flowchart according to the backlight module of another embodiment of the present invention.With reference to Fig. 5, this backlight module comprises a LED-backlit source (being made of LED L1 and printed circuit board (PCB)), a LGP 10 and a reflector plate 50.The LED-backlit source is arranged at a side of LGP 10, and reflector plate 50 is arranged at the lower surface of LGP 10.
And backlight module of the present invention also comprises an optical thin film layer 40.Optical thin film layer 40 comprises one first horizontal part 402, one second horizontal part 406 and the vertical portion 404 that connects the first horizontal part 402 and the second horizontal part 406.The first horizontal part 402 is positioned at the upper surface of LGP 10, and vertical portion 404 is between a side of LED-backlit source and LGP 10, and the second horizontal part 406 is positioned at the below of reflector plate 50, wherein, the surface of optical thin film layer 40 has the leaded light micro-structural, and for example, this leaded light micro-structural is V-shaped groove.
In one embodiment, the material of optical thin film layer 40 is a prismatic lens (prism) or a lenticule (micro lens).
In addition, the vertical portion 404 of optical thin film layer 40 is pasted to the side of LGP 10 by optical cement 602.Reflector plate 50 is against the vertical portion 404 of optical thin film layer 40, and the second horizontal part 406 of optical thin film layer 40 is pasted to the lower surface of reflector plate 50 by optical cement 604.
In one embodiment, the first horizontal part 402 of optical thin film layer 40, vertical portion 404 and the second horizontal part 406 separate by a broken line or a roulette.
Adopt backlight module of the present invention, by arranging such as prismatic lens or lenticular optical thin film layer, and the horizontal part of optical thin film layer is placed on the upper surface of LGP, the vertical portion of this optical thin film layer is placed on a side of LGP, by a broken line or a roulette the two is separated, when the surface of optical thin film layer is made as V-arrangement, can effectively eliminate the hot spot phenomenon of LGP light inlet side, also can increase the uniformity of light inlet.In addition, this backlight module also can reduce the usage quantity of LED backlight by optical thin film layer, reduces energy consumption, saves cost.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and in situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replacement all drop in claims limited range of the present invention.
Claims (10)
1. a backlight module comprises a LED-backlit source and a LGP, and described LED-backlit source is arranged at a side of described LGP, it is characterized in that, described backlight module also comprises:
One optical thin film layer, comprise a horizontal part and a vertical portion, described horizontal position is in the upper surface of described LGP, described vertical portion is positioned at a side of described LGP, this side is towards described LED-backlit source, wherein, the horizontal part of described optical thin film layer and vertical portion adopt a broken line or a roulette to separate, and the surface of optical thin film layer has a plurality of leaded light micro-structurals.
2. backlight module according to claim 1 is characterized in that, the material of described optical thin film layer is a prismatic lens (prism) or a lenticule (micro lens).
3. backlight module according to claim 1 is characterized in that, described leaded light micro-structural is V-shaped groove.
4. backlight module according to claim 3 is characterized in that, described LED-backlit source comprises a plurality of LED, and adjacent LED has a pitch, and the V-shaped groove of the vertical portion of described optical thin film layer and described pitch are complementary.
5. backlight module according to claim 4 is characterized in that, disposes the spacing of a patterning corresponding to the adjacent V-shaped groove of the described vertical portion of dark space.
6. a backlight module comprises a LED-backlit source, a LGP and a reflector plate, and described LED-backlit source is arranged at a side of described LGP, and described reflector plate is arranged at the lower surface of described LGP, it is characterized in that, described backlight module also comprises:
One optical thin film layer, comprise one first horizontal part, one second horizontal part and the vertical portion that connects described the first horizontal part and described the second horizontal part, described the first horizontal position is in the upper surface of described LGP, described vertical portion is between a side of described LED-backlit source and described LGP, described the second horizontal position is in the below of described reflector plate, wherein, the surface of described optical thin film layer has a plurality of leaded light micro-structurals.
7. backlight module according to claim 6 is characterized in that, the material of described optical thin film layer is a prismatic lens (prism) or a lenticule (micro lens).
8. backlight module according to claim 6 is characterized in that, described side to described LGP is pasted by optical cement in the vertical portion of described optical thin film layer.
9. backlight module according to claim 6 is characterized in that, described reflector plate is against the vertical portion of described optical thin film layer, and the second horizontal part of described optical thin film layer is pasted lower surface to described reflector plate by optical cement.
10. backlight module according to claim 6 is characterized in that, the first horizontal part of described optical thin film layer, vertical portion and the second horizontal part separate by a broken line or a roulette.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104475335A CN102927503A (en) | 2012-11-09 | 2012-11-09 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104475335A CN102927503A (en) | 2012-11-09 | 2012-11-09 | Backlight module |
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| CN102927503A true CN102927503A (en) | 2013-02-13 |
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| CN2012104475335A Pending CN102927503A (en) | 2012-11-09 | 2012-11-09 | Backlight module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344283A (en) * | 2013-08-01 | 2015-02-11 | 扬升照明股份有限公司 | Backlight module |
| CN104534417A (en) * | 2014-12-24 | 2015-04-22 | 安徽芯瑞达电子科技有限公司 | PCB and direct type backlight module with PCB |
| CN104696875A (en) * | 2015-04-02 | 2015-06-10 | 江苏双星彩塑新材料股份有限公司 | Prism diaphragm for eliminating side light spots of LEDs |
| CN109982125A (en) * | 2019-04-29 | 2019-07-05 | 骏升科技（扬州）有限公司 | A kind of large aperture multicolour light transmission remote controler |
-
2012
- 2012-11-09 CN CN2012104475335A patent/CN102927503A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344283A (en) * | 2013-08-01 | 2015-02-11 | 扬升照明股份有限公司 | Backlight module |
| CN104534417A (en) * | 2014-12-24 | 2015-04-22 | 安徽芯瑞达电子科技有限公司 | PCB and direct type backlight module with PCB |
| CN104534417B (en) * | 2014-12-24 | 2018-06-26 | 安徽芯瑞达科技股份有限公司 | A kind of PCB and its down straight aphototropism mode set of application |
| CN104696875A (en) * | 2015-04-02 | 2015-06-10 | 江苏双星彩塑新材料股份有限公司 | Prism diaphragm for eliminating side light spots of LEDs |
| CN104696875B (en) * | 2015-04-02 | 2017-07-04 | 江苏双星彩塑新材料股份有限公司 | A kind of prism diaphragm of elimination LED sides illuminating spotlight point |
| CN109982125A (en) * | 2019-04-29 | 2019-07-05 | 骏升科技（扬州）有限公司 | A kind of large aperture multicolour light transmission remote controler |
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Application publication date: 20130213 |