CN103672537A - LED light bar, backlight module and display device - Google Patents
LED light bar, backlight module and display device Download PDFInfo
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- CN103672537A CN103672537A CN201310694847.XA CN201310694847A CN103672537A CN 103672537 A CN103672537 A CN 103672537A CN 201310694847 A CN201310694847 A CN 201310694847A CN 103672537 A CN103672537 A CN 103672537A
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- lamp bar
- led lamp
- wiring board
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Abstract
The embodiment of the invention provides an LED light bar, a backlight module and a display device, and relates to the technical field of display. The hot spot phenomenon can be avoided, and the quality of display images of the display device is improved. The LED light bar comprises a circuit board, a plurality of LED chips and a light diffusion device, wherein the LED chips are arranged on the circuit board, and the light diffusion device is arranged on the circuit board and used for diffusing light emitted by the LED chips. The LED light bar is used for the backlight module and the display device needing avoiding the hot spot phenomenon.
Description
Technical field
The present invention relates to Display Technique field, relate in particular to a kind of LED lamp bar, backlight source module and display unit.
Background technology
The advantages such as at present, backlight source module is generally comprised of light source, LGP, blooming piece etc., and wherein to have volume little due to light emitting diode (Light Emitting Diode, be called for short LED), and power consumption is low, long service life, are widely used in light source.
Yet, as shown in Figure 1, because LED chip 102 is point-like illuminator, its lighting angle is 120 ° of left and right, the similar fan-shaped of light emitting region, like this, can produce luminous blind area due to the existence at above-mentioned visual angle between any two LED chips of a plurality of LED chips that are arranged in a linear.In the case, if the distance between LGP 202 and LED chip 102 is very near, the region of the LGP 202 corresponding with this luminous blind area dull thread pass through, thereby there is Hot Spot(i.e. " firefly ") phenomenon.If increase the distance between LGP 202 and LED chip 102, although can eliminate Hot Spot phenomenon, can cause LED chip 102 angulars field of view less, the utilization rate of light is reduced.
Summary of the invention
The embodiment of the present invention provides a kind of LED lamp bar, backlight source module and display unit, can avoid Hot Spot phenomenon, improves the quality of display unit display frame.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the embodiment of the present invention provides a kind of LED lamp bar, and this LED lamp bar comprises wiring board, is arranged on a plurality of LED chips on described wiring board; Further comprise the light disperser being arranged on described wiring board, described smooth disperser is for spreading the light that described a plurality of LED chip sends.
Optionally, described smooth disperser at least comprises the transparent surface parallel with described wiring board and the tiny site that is positioned at relative described wiring board one side surface of described transparent surface; Wherein, described a plurality of LED chip is between described wiring board and described transparent surface.
Further alternative, the one side of the relatively described wiring board in described tiny site is convex surface.
Optionally, described smooth disperser also comprises first side vertical with described transparent surface, and described the first side is positioned at the outermost of described a plurality of LED chips; Wherein, described transparent surface and described the first side are integrated.
Further alternative, described LED lamp bar also comprises reflecting layer, and described reflecting layer is arranged on described the first side on the surface of LED chip one side.
Further alternative, described the first side is extended and is surpassed described transparent surface; Described reflecting layer is also arranged on the part that described transparent surface is extended and surpassed in described the first side.
Optionally, described smooth disperser also comprises the second side with described the first parallel sided; Wherein, described a plurality of LED chip is positioned at the space in described transparent surface, described the first side, described the second side and described wiring board besieged city; Described reflecting layer is also arranged on described the second side on the surface of described LED chip one side.
On the other hand, the embodiment of the present invention provides a kind of backlight source module, comprises above-mentioned LED lamp bar.
Optionally, described backlight source module also comprises LGP; Described LED lamp bar is arranged on the light incident sides of described LGP.
On the one hand, the embodiment of the present invention provides a kind of display unit, comprises above-mentioned backlight source module again.
The embodiment of the present invention provides a kind of LED lamp bar, backlight source module and display unit, this LED lamp bar comprises wiring board, be arranged on a plurality of LED chips on described wiring board, also comprise the light disperser being arranged on described wiring board, described smooth disperser is for spreading the light that described a plurality of LED chip sends; Compared to existing technology, between any two LED chips, the existence due to its luminous visual angle of 120 ° produces luminous blind area, in the embodiment of the present invention by light disperser is set, the light that all LED chips from LED lamp bar are sent is spread, thereby make the equalizing light rays of sending from this LED lamp bar, like this when this LED lamp bar is applied to backlight source module, can avoid making the subregion dull thread of LGP to pass through, thereby avoided Hot Spot phenomenon, and then can improve the quality of display unit display frame.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the scope schematic diagram of the light that in prior art, LED chip sends;
The schematic perspective view one of a kind of LED lamp bar that Fig. 2 a provides for the embodiment of the present invention;
Fig. 2 b is the schematic side view of the LED lamp bar shown in Fig. 2 a;
The schematic perspective view two of a kind of LED lamp bar that Fig. 3 a provides for the embodiment of the present invention;
Fig. 3 b is the schematic side view of the LED lamp bar shown in Fig. 3 a;
The schematic side view one of a kind of LED lamp bar that Fig. 4 provides for the embodiment of the present invention;
The schematic perspective view three of a kind of LED lamp bar that Fig. 5 provides for the embodiment of the present invention;
The schematic side view two of a kind of LED lamp bar that Fig. 6 provides for the embodiment of the present invention;
The structural representation one of the backlight source module that Fig. 7 provides for the embodiment of the present invention;
The structural representation two of the backlight source module that Fig. 8 provides for the embodiment of the present invention.
Reference numeral:
10-LED lamp bar; 20-backlight source module; 101-wiring board; 102-LED chip; 103-light disperser; 1031-transparent surface; The tiny site of 1032-; 1033-the first side; 1034-the second side; 104-reflecting layer; 201-base plate; 202-LGP; 203-blooming piece; 204-sheet emitting.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of LED lamp bar 10, and as shown in Figures 2 to 6, this LED lamp bar 10 comprises wiring board 101, is arranged on a plurality of LED chips 102 on described wiring board; Further comprise the light disperser 103 being arranged on described wiring board 101, the light that described smooth disperser 103 sends for spreading described a plurality of LED chip.
Wherein, described a plurality of LED chip 102 is preferably and is the arrangement of " one " font.
It should be noted that, the first, the embodiment of the present invention does not limit described smooth disperser 103, the light sending can receive all LED chips 102, and these light are spread, thereby the equalizing light rays of sending from this LED lamp bar 10 is as the criterion.
In addition, described wiring board 101 and the fixed form of described smooth disperser 103 are not limited, as long as described wiring board 101 is not moved each other with described smooth disperser 103.
The second, because the effect of LED lamp bar 10 is emission of lights, therefore, it will be understood by those skilled in the art that the material of this part should be transparent material when described smooth disperser 103 comprises the part that is arranged on described LED chip 102 exiting surfaces.
Wherein, in the embodiment of the present invention, described transparent material is not continued to limit, can, according to actual conditions, preferably choose the transparent material that light transmission rate is high.
The 3rd, described wiring board 101 is electrically connected with described LED chip 102, and its effect is to drive described LED chip 102 luminous.Wherein, described wiring board 101 can be for example printed circuit board (PCB) (Printed circuit board, referred to as PCB), can be also flexible PCB (Flexible Printed Circuit, referred to as FPC).
The embodiment of the present invention provides a kind of LED lamp bar 10, this LED lamp bar comprises wiring board 101, be arranged on a plurality of LED chips 102 on described wiring board 101, and be arranged on the light disperser 103 on described wiring board 101, the light that described smooth disperser 103 sends for spreading described a plurality of LED chip 102; Compared to existing technology, between any two LED chips 102, the existence due to its luminous visual angle of 120 ° produces luminous blind area, in the embodiment of the present invention by light disperser 103 is set, the light that all LED chips 102 from LED lamp bar 10 are sent is spread, thereby make the equalizing light rays of sending from this LED lamp bar 10, like this when this LED lamp bar 10 is applied to backlight source module, can avoid making the subregion dull thread of LGP to pass through, thereby avoided Hot Spot phenomenon, and then can improve the quality of display unit display frame.
Optionally, as shown in Fig. 2-Fig. 6, described smooth disperser 103 at least comprises the transparent surface 1031 parallel with described wiring board 101 and the tiny site 1032 that is positioned at relative described wiring board 101 1 side surfaces of described transparent surface 1031; Wherein, described a plurality of LED chip 102 is between described wiring board 101 and described transparent surface 1031.
Here, described tiny site 1032 can prepare by mode of printing, its effect is the diffusion of carrying out light, the light sending from LED chip 102 is inciding described tiny site 1032, by tiny site 1032, spread, thereby make the light uniformization that sends from the transparent surface 1031 of this LED lamp bar 10.
Further alternative, the one side of the relatively described wiring board 101 in described tiny site 1032 is convex surface.
Like this, after the light sending from LED chip 102 incides the convex surface of described tiny site 1032, just can there is scattering of light.
Further alternative, as shown in Fig. 2 a and 3a, described smooth disperser 103 can also comprise first side 1033 vertical with described transparent surface 1031, and described the first side 1033 is positioned at the outermost of described a plurality of LED chip 102; Wherein, described transparent surface 1031 and described the first side 1033 are integrated.
Like this, can the first side 1033 is fixing with described wiring board 101, make the relatively described wiring board 101 of described smooth disperser 103 be difficult for being moved.
It should be noted that, described the first side 1033 is not limited here, it can be any side between described wiring board 101 and described transparent surface 1031, as long as can make described transparent surface 1031 fixing.
On this basis, as shown in Fig. 2 b and 3b, in described the first side 1033, towards LED chip 102 1 side surfaces, reflecting layer 104 is set.Can, by the light reflection that incides reflecting layer 104 to described transparent surface 1031, improve the utilization rate of light like this.
Here, when described LED lamp bar 10 is applied to backlight source module and is side entering type, consider that backlight source module also comprises metal backing, and generally described metal backing comprises base plate and side plate, and metal backing is opaque, can there is not light leak, therefore, light leak without the side of close described side plate and base plate between the described wiring board 101 of consideration and described transparent surface 1031, but need to consider for the close side of the light-emitting face with backlight source module, therefore, described the first side 1033 can be set to base plate with described backlight source module parallel and away from described base plate, like this because 1033 surfaces, described the first side are provided with reflecting layer 104, can avoid the generation of light leak.
Further, as shown in Figure 4, described the first side 1033 can be extended and surpasses described transparent surface 1031.In the case, described reflecting layer 104 is also followed described the first side 1033 and is extended.
Like this, when described LED lamp bar 10 is applied to backlight source module and is side entering type, can exceed by described the first side 1033 is rationally set the length of described transparent surface 1031 parts, the described reflecting layer 104 that makes to be positioned at 1033 surfaces, described the first side that exceed described transparent surface 1031 stops from the light of transparent surface 1031 outgoing directly to be penetrated, avoid light leak, this part light can also be reflexed to the LGP of backlight source module on this basis, thereby further improve the utilization rate of light.
Description based on above-mentioned, as illustrated in Figures 5 and 6, described smooth disperser 103 also comprises the second side 1034 with described the first parallel sided.
Wherein, described a plurality of LED chip 102 is positioned at the space in described transparent surface 1031, described the first side 1033, described the second side 1034 and described wiring board 101 besieged cities; Described reflecting layer 104 is also arranged on described the second side 1034 on the surface of described LED chip 102 1 sides.
On the one hand, by the second side 1034 is set, can make described transparent surface 1031 more firm, another reverse side, also arranges described reflecting layer 104 on the surface of described the second side 1034, can further improve the utilization rate of light.
On this basis, also can exceed by described the first side 1033 and the second side 1034 are rationally set the length of described transparent surface 1031 parts, make to be positioned at and exceed described first side 1033 of described transparent surface 1031 and the described reflecting layer 104 on 1034 surfaces, described the second side and stop from the light of transparent surface 1031 outgoing and directly penetrate, avoid light leak.
In addition,, in the embodiment of the present invention, also can as required the second side 1034 be set to vertical with described the first side 1033; Or between described wiring board 101 and described transparent surface 1031, except arranging the first side 1033 and the second side 1034, the 3rd side and the 4th side are also set, specifically according to actual conditions, set, at this, do not limit.
The embodiment of the present invention also provides a kind of backlight source module 20, and as shown in Figure 7 and Figure 8, this backlight source module comprises above-mentioned LED lamp bar 10.
Preferably, described backlight source module 20 is side-edge type backlight module.
In the case, the reflector plate 204 etc. that described backlight source module 20 can also comprise metal backing, be arranged on LGP 202 on the base plate 201 of described metal backing, is arranged on the blooming piece 203 of described LGP top and is arranged on described LGP 202 belows; Wherein, described LED lamp bar 10 is arranged on the side of described LGP 202.
Here, have and between difform described LGP 202 and described LED lamp bar 10 and described reflector plate 204, there is relative position relation as described below:
For described LGP 202, be flat situation, shown in figure 7, described LGP 202 is set up in parallel above described reflector plate 204 with described LED lamp bar 10.
For described LGP 202, it is the tabular situation of wedge shape, as shown in Figure 8, the direction that the light sending along the transparent surface 1031 of described LED chip 102 enters described LGP 202, in described LGP 202, a thicker side is arranged on a side close with described transparent surface 1031, and another thinner side is arranged on the side away from described transparent surface 1031 in described LGP 202, here, for the light that described LED lamp bar 10 is injected in described LGP 202 is converted into the area source vertical with the base plate 201 of described metal backing, the horizontal surface of described LGP 202 is arranged on the side away from described base plate 201, the inclined surface of described LGP 202 is arranged on the top of described reflector plate 204, and, described reflector plate 204 to be shaped as the wedge shape of agreeing with mutually with described LGP 202 tabular.
In addition, the material described LGP 202 not being adopted is limited, described LGP 202 can be for example to adopt Merlon (Polycarbonate, referred to as PC) or the tabular with high light transmittance or the tabular thin plate of wedge shape of the plastic particles injection mo(u)lding such as polymethyl methacrylate (Polymethyl Methacrylate, referred to as PMMA).
Provide a specific embodiment to describe the structure of the above-mentioned side-light type back light module 20 that comprises described LED lamp bar 10 in detail below.
Shown in figure 7, described side-light type back light module 20 comprises: backboard, described backboard comprises base plate 201, be arranged on reflector plate 204 on described base plate 201, be arranged on the tabular LGP 202 on described reflector plate 204 and be set up in parallel with described LGP 202 and be positioned at the described LED lamp bar 10 of described LGP 202 1 sides and be arranged on the blooming piece 203 on described LGP 202.
Described LED lamp bar 10 comprises wiring board 101, is arranged on a plurality of LED chips 102 on described wiring board 101 and is arranged on the light disperser 103 on described wiring board 101; Described smooth disperser 103 comprises the transparent surface 1031 parallel with described wiring board 101, the first vertical with described transparent surface 1031 and parallel with described base plate 201 side 1033 and the tiny site 1032 that is arranged on relative described wiring board 101 1 side surfaces of described transparent surface 1031; Further described LED lamp bar 10 also comprises the reflecting layer 104 that is arranged on described the first relatively described LED chip 102 1 sides in side 1033.
Wherein, described transparent surface 1031 and described the first side 1033 are integrated; Described a plurality of LED chip 102 is positioned at the space that described wiring board 101, described transparent surface 1031, the first side 1033 and reflector plate 204 surround.
Described the first side 1033 is positioned at bright dipping one side of described LGP 202 and described the first side 1033 higher than the exiting surface of described LGP 202; Described the first side 1033 is extended and is surpassed described transparent surface 1031, and described reflecting layer 104 is extended and surpassed described transparent surface 1031.
Like this, by light disperser 103 is set, the light that all LED chips 102 from LED lamp bar 10 are sent is spread, thereby makes the equalizing light rays sent from this LED lamp bar 10, can avoid making the subregion dull thread of LGP 202 to pass through, thereby avoid Hot Spot phenomenon; In addition, can be by the light reflection that incides reflecting layer 104 to described transparent surface 1031 and LGP 202 by described reflecting layer 104 is set, avoid light leak and improve the utilization rate of light.
A kind of display unit that the embodiment of the present invention also provides, comprises the backlight source module 20 described in above-mentioned any one.
Because the light that the LED lamp bar 10 in the above-mentioned described backlight source module 20 providing sends is even, can avoid making the subregion dull thread of LGP to pass through, thereby avoided Hot Spot phenomenon, thereby, when it is applied to described display unit, just can improve the picture total quality of described display unit.
Above-mentioned display unit can be product or the parts that liquid crystal display, LCD TV, DPF, mobile phone, panel computer etc. have any Presentation Function.
It should be noted that, institute of the present invention drawings attached is the simple schematic diagram of described LED lamp bar 10 and described backlight source module 20, only for the clear this programme of describing has embodied the structure relevant to inventive point, for other with the irrelevant structure of inventive point be existing structure, do not embody in the accompanying drawings or realizational portion only.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a LED lamp bar, comprises wiring board, is arranged on a plurality of LED chips on described wiring board; It is characterized in that, also comprise the light disperser being arranged on described wiring board, described smooth disperser is for spreading the light that described a plurality of LED chip sends.
2. LED lamp bar according to claim 1, is characterized in that, described smooth disperser at least comprises the transparent surface parallel with described wiring board and the tiny site that is positioned at relative described wiring board one side surface of described transparent surface;
Wherein, described a plurality of LED chip is between described wiring board and described transparent surface.
3. LED lamp bar according to claim 2, is characterized in that, the one side of the relatively described wiring board in described tiny site is convex surface.
4. LED lamp bar according to claim 2, is characterized in that, described smooth disperser also comprises first side vertical with described transparent surface, and described the first side is positioned at the outermost of described a plurality of LED chips;
Wherein, described transparent surface and described the first side are integrated.
5. LED lamp bar according to claim 4, is characterized in that, described LED lamp bar also comprises reflecting layer, and described reflecting layer is arranged on described the first side on the surface of LED chip one side.
6. LED lamp bar according to claim 5, is characterized in that, described the first side is extended and surpassed described transparent surface;
Described reflecting layer is also arranged on the part that described transparent surface is extended and surpassed in described the first side.
7. LED lamp bar according to claim 5, is characterized in that, described smooth disperser also comprises the second side with described the first parallel sided;
Wherein, described a plurality of LED chip is positioned at the space in described transparent surface, described the first side, described the second side and described wiring board besieged city;
Described reflecting layer is also arranged on described the second side on the surface of described LED chip one side.
8. a backlight source module, is characterized in that, comprises at least one LED lamp bar as described in claim 1 to 7 any one.
9. backlight source module according to claim 8, is characterized in that, described backlight source module also comprises LGP;
Described LED lamp bar is arranged on the light incident sides of described LGP.
10. a display unit, is characterized in that, comprises the backlight source module described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694847.XA CN103672537B (en) | 2013-12-17 | 2013-12-17 | A kind of LED lamp bar, backlight source module and display unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694847.XA CN103672537B (en) | 2013-12-17 | 2013-12-17 | A kind of LED lamp bar, backlight source module and display unit |
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| Publication Number | Publication Date |
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| CN103672537A true CN103672537A (en) | 2014-03-26 |
| CN103672537B CN103672537B (en) | 2016-05-25 |
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| CN104279462A (en) * | 2014-09-18 | 2015-01-14 | 合肥鑫晟光电科技有限公司 | Backlight source and display device |
| CN105674133A (en) * | 2016-01-14 | 2016-06-15 | 京东方科技集团股份有限公司 | LED lamp bar, backlight source module and display device |
| CN106090730A (en) * | 2016-07-04 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| WO2018201538A1 (en) * | 2017-05-05 | 2018-11-08 | 武汉华星光电技术有限公司 | Led light strip and backlight assembly |
| CN109507832A (en) * | 2019-01-09 | 2019-03-22 | 惠州市华星光电技术有限公司 | Liquid crystal display device |
| CN111240094A (en) * | 2020-03-12 | 2020-06-05 | 京东方科技集团股份有限公司 | Area light source |
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| CN104279462A (en) * | 2014-09-18 | 2015-01-14 | 合肥鑫晟光电科技有限公司 | Backlight source and display device |
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| CN111240094A (en) * | 2020-03-12 | 2020-06-05 | 京东方科技集团股份有限公司 | Area light source |
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| Publication number | Publication date |
|---|---|
| CN103672537B (en) | 2016-05-25 |
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