CN203836857U - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
- Publication number
- CN203836857U CN203836857U CN201420203499.1U CN201420203499U CN203836857U CN 203836857 U CN203836857 U CN 203836857U CN 201420203499 U CN201420203499 U CN 201420203499U CN 203836857 U CN203836857 U CN 203836857U
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- Prior art keywords
- micro
- reflection structure
- circuit board
- printed circuit
- led lamp
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- 238000010586 diagram Methods 0.000 description 9
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000002310 reflectometry Methods 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- Planar Illumination Modules (AREA)
Abstract
The utility model provides a backlight source and a display device. The backlight source comprises a light guide plate, a printed circuit board and a plurality of LED light bars. The LED light bars are arranged on the printed circuit board at intervals, and the LED light bars are arranged on one side of the light incident face of the light guide plate. The light incident face of the light guide plate is further provided with a first micro reflection structure, and the first micro reflection structure is used for reflecting light reflected by the LED light bars to the printed circuit board. According to the backlight source and the display device, the first micro reflection structure is additionally arranged on the light incidence face of the light guide plate, one part of the light emitted by the LED light bars can be reflected to the printed circuit board through the first micro reflection structure so that the light proportion difference between different areas can be lowered, and the occurrence rate of the bad hotspot problem of the backlight source can be effectively lowered.
Description
Technical field
The utility model relates to demonstration field, relates in particular to a kind of backlight and display unit.
Background technology
Liquid crystal display belongs to passive light-emitting device, mainly liquid crystal panel and backlight two parts, consists of.Wherein, the liquid crystal layer in liquid crystal panel itself does not have lighting function, needs backlight to show to realize image for liquid crystal panel provides light source.
Top view LED (the top transmitting LED) products that use in the large area backlight structure of using at present more, referring to Fig. 1, this backlight comprises printed circuit board (PCB) 1 ' and LGP 2 ', printed circuit board (PCB) 1 ' is arranged on incidence surface one side of LGP 2 ', and on printed circuit board (PCB) 1 ', be provided with a plurality of spaced LED (Light Emitting Diode, light emitting diode) lamp bar 3 ', the light being sent by LED lamp bar 3 ' is entered LGP 2 ' and then is provided light source to liquid crystal panel by the incidence surface 21 ' of LGP 2 ', because the plurality of LED lamp bar power is larger, heating obviously, therefore in the process of assembled LED lamp bar and LGP, need between will reserve certain gap, simultaneously because the plurality of LED lamp bar is disposed on printed circuit board (PCB), therefore at LGP incidence surface, form the region of different brightness, referring to Fig. 1, brightness over against the a-quadrant of LED lamp bar on LGP 2 ' incidence surface is higher, and the B region adjacent with a-quadrant is due to distant with LED lamp bar, its brightness is lower, thereby easily cause bright spot optics bad phenomenon.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is to provide a kind of backlight and display unit, can reduce the bad incidence of bright spot of backlight.
(2) technical scheme
For solving the problems of the technologies described above, the technical solution of the utility model provides a kind of backlight, comprise LGP, printed circuit board (PCB) and a plurality of LED lamp bar, described a plurality of LED lamp bar is disposed on described printed circuit board (PCB), and described a plurality of LED lamp bar is arranged on described LGP incidence surface one side, wherein, on described LGP incidence surface, be also provided with the first micro-reflection structure, described the first micro-reflection structure reflexes to described printed circuit board (PCB) for the light that described LED lamp bar is sent.
Further, described the first micro-reflection structure is a plurality of, and described a plurality of the first micro-reflection structure is disposed on described LGP incidence surface.
Further, described a plurality of the first micro-reflection structure and described a plurality of LED lamp bar are one by one over against setting.
Further, the reflecting surface of described the first micro-reflection structure be shaped as following any one: rectangle, circle, ellipse, triangle, arc.
Further, be also provided with the second micro-reflection structure on described printed circuit board (PCB), described the second micro-reflection structure is for reflexing to described LGP by the light of described the first micro-reflection structure reflection.
Further, described the second micro-reflection structure is arranged between two adjacent LED lamp bars.
Further, described the second micro-reflection structure is a plurality of, and described the second micro-reflection structure and described LED lamp bar are disposed on described printed circuit board (PCB) one by one.
Further, the reflecting surface of described the second micro-reflection structure be shaped as following any one: rectangle, circle, ellipse, triangle, arc.
For solving the problems of the technologies described above, the utility model also provides a kind of display unit, comprises above-mentioned any one backlight module.
(3) beneficial effect
The utility model increases by the first micro-reflection structure on LGP incidence surface, a part in LED lamp bar can being emitted beam by this first micro-reflection structure is reflected back printed circuit board (PCB), thereby can reduce the light proportional difference between zones of different, can effectively reduce the incidence of the bad problem of bright spot (hotspot) of backlight.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of backlight of providing of prior art;
Fig. 2 is the schematic diagram of a kind of backlight of providing of the utility model embodiment;
Fig. 3 is the schematic diagram of a kind of LGP incidence surface of providing of the utility model embodiment;
Fig. 4 is the schematic diagram of the another kind of LGP incidence surface that provides of the utility model embodiment;
Fig. 5 is the schematic diagram of the another kind of backlight that provides of the utility model embodiment;
Fig. 6 is the schematic diagram of a kind of printed circuit board (PCB) of providing of the utility model embodiment;
Fig. 7 is the schematic diagram of the another kind of printed circuit board (PCB) that provides of the utility model embodiment.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
Fig. 2 is the schematic diagram of a kind of backlight of providing of the utility model embodiment, this backlight comprises LGP 2, printed circuit board (PCB) 1 and a plurality of LED lamp bar 3, described a plurality of LED lamp bar 3 is disposed on described printed circuit board (PCB) 1, and described a plurality of LED lamp bar 3 is arranged on described LGP incidence surface 21 1 sides, wherein, on described LGP 2 incidence surfaces 21, be also provided with the first micro-reflection structure 4, described the first micro-reflection structure 4 reflexes to described printed circuit board (PCB) 1 for the light that described LED lamp bar 3 is sent.
The backlight that the utility model embodiment provides, on LGP incidence surface, increased by the first micro-reflection structure, a part in LED lamp bar can being emitted beam by this first micro-reflection structure is reflected back printed circuit board (PCB), thereby can reduce the light proportional difference between zones of different, can effectively reduce the incidence of the bad problem of bright spot (hotspot) of backlight.
Particularly, a plurality of the first above-mentioned micro-reflection structures 4 can be set on LGP 2 incidence surfaces 21, and the plurality of the first micro-reflection structure is disposed on described LGP incidence surface.
Preferably, referring to Fig. 2, first micro-reflection structure identical with LED lamp bar quantity can be set on LGP 2 incidence surfaces 21, and make the plurality of the first micro-reflection structure and a plurality of LED lamp bar one by one over against setting, in the light that thereby each LED lamp bar can be sent, stronger part is reflected back printed circuit board (PCB), reduce on LGP exiting surface with LED lamp bar over against the brightness of a-quadrant, and then reduce the luminance difference between a-quadrant and adjacent B region.Particularly, referring to Fig. 3, the first micro-reflection structure 4 can be arranged on region 211 corresponding with LED lamp bar on LGP incidence surface 21.
Wherein, for the first micro-reflection structure in the utility model embodiment, the reflectivity at its each position can be different, referring to Fig. 4,42Dao centre, edge 41 from the first micro-reflection structure, its reflectivity can increase gradually, thereby can reduce further the luminance difference between a-quadrant and adjacent B region.
The light that the first micro-reflection structure in the utility model embodiment sends LED lamp bar by the reflecting surface on it reflexes to printed circuit board (PCB), wherein, this reflecting surface be shaped as following any one: rectangle, circle, ellipse, triangle, arc.Particularly, can by technology modes such as printing coatings, form the first micro-reflection structure on the surface of LGP light inlet side, its printing material can adopt resin, pigment (can adopt the SiO & TiO2 with reflex) and diffusant, the net-point printing material that also can adopt similar LGP to use at present, its color can be white, the colors such as black, the reflecting surface of the first micro-reflection structure of the present utility model can be not only rectangle simultaneously, circular, oval, triangle, indent arc, can also be other structures that the light of penetrating LED incident LGP can be reflected.In addition, the size of this first micro-reflection structure, Density Distribution, collating sequence can be also to adjust setting according to the concrete condition of backlight optics bright spot (hotspot).
Fig. 5 is the schematic diagram of the another kind of backlight that provides of the utility model embodiment, this backlight comprises LGP 2, printed circuit board (PCB) 1 and a plurality of LED lamp bar 3, described a plurality of LED lamp bar 3 is disposed on described printed circuit board (PCB) 1, and described a plurality of LED lamp bar 3 is arranged on described LGP incidence surface 21 1 sides, wherein, on described LGP 2 incidence surfaces 21, be also provided with the first micro-reflection structure 4, described the first micro-reflection structure 4 reflexes to described printed circuit board (PCB) 1 for the light that described LED lamp bar 3 is sent, on described printed circuit board (PCB), be also provided with the second micro-reflection structure 5, described the second micro-reflection structure 5 is for reflexing to described LGP 2 by the light of described the first micro-reflection structure 4 reflections.
Particularly, the second micro-reflection structure can be arranged between two adjacent LED lamp bars, referring to Fig. 5, when light LED lamp bar 3 being sent when the first micro-reflection structure 4 reflexes to described printed circuit board (PCB) 1, the second micro-reflection structure 5 on printed circuit board (PCB) 1 can reflect the light reflexing on printed circuit board (PCB) again, make the reverberation of part reflex to the B region shown in Fig. 5, thereby can increase the brightness in LGP incidence surface B region, and then reduce the light luminance difference between zones of different.
Preferably, a plurality of the second above-mentioned micro-reflection structures can be set on printed circuit board (PCB), and the second micro-reflection structure and described LED lamp bar are disposed on described printed circuit board (PCB) one by one.Referring to Fig. 6, on printed circuit board (PCB), comprise a plurality of spaced regions 11, this region 11 is for arranging LED lamp bar, and this second micro-reflection structure 5 can be arranged on two regions between adjacent area 11.
Wherein, for the second micro-reflection structure in the utility model embodiment, the reflectivity at its each position can be different, referring to Fig. 7,52Dao centre, edge 51 from the second micro-reflection structure, its reflectivity can increase gradually, thereby can reduce further the luminance difference between a-quadrant and adjacent B region.
The second micro-reflection structure in the utility model embodiment reflexes to described LGP by the reflecting surface on it by the light of the first micro-reflection structure reflection, wherein, this reflecting surface be shaped as following any one: rectangle, circle, ellipse, triangle, arc.Wherein, this second micro-reflection structure can adopt the mode identical with above-mentioned the first micro-reflection structure to be formed on printed circuit board (PCB).And the size of this second micro-reflection structure, Density Distribution, collating sequence can be also to adjust setting according to the concrete condition of backlight optics bright spot (hotspot).
The backlight that the utility model embodiment provides, by the first micro-reflection structure is set on the incidence surface of LGP, and on printed circuit board (PCB) region division the second micro-reflection structure between two adjacent LEDs lamp bar, thereby can reduce on LGP with LED lamp bar over against the brightness in region and increase and brightness over against region adjacent area, and then can reduce the light proportional difference between zones of different, can effectively reduce the incidence of the bad problem of bright spot (hotspot) of backlight.
The utility model embodiment also provides a kind of display unit, comprises above-mentioned backlight.Wherein, above-mentioned display unit can be any product or parts with Presentation Function such as note-book computer display screen, Electronic Paper, organic light emitting diode display, liquid crystal display, LCD TV, DPF, mobile phone, panel computer.
Above embodiment is only for illustrating the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (9)
1. a backlight, comprise LGP, printed circuit board (PCB) and a plurality of LED lamp bar, described a plurality of LED lamp bar is disposed on described printed circuit board (PCB), and described a plurality of LED lamp bar is arranged on described LGP incidence surface one side, it is characterized in that, on described LGP incidence surface, be also provided with the first micro-reflection structure, described the first micro-reflection structure reflexes to described printed circuit board (PCB) for the light that described LED lamp bar is sent.
2. backlight according to claim 1, is characterized in that, described the first micro-reflection structure is a plurality of, and described a plurality of the first micro-reflection structure is disposed on described LGP incidence surface.
3. backlight according to claim 2, is characterized in that, described a plurality of the first micro-reflection structures and described a plurality of LED lamp bar are one by one over against setting.
4. backlight according to claim 1, is characterized in that, the reflecting surface of described the first micro-reflection structure be shaped as following any one: rectangle, circle, ellipse, triangle, arc.
5. according to the arbitrary described backlight of claim 1 to 4, it is characterized in that, be also provided with the second micro-reflection structure on described printed circuit board (PCB), described the second micro-reflection structure is for reflexing to described LGP by the light of described the first micro-reflection structure reflection.
6. backlight according to claim 5, is characterized in that, described the second micro-reflection structure is arranged between two adjacent LED lamp bars.
7. backlight according to claim 6, is characterized in that, described the second micro-reflection structure is a plurality of, and described the second micro-reflection structure and described LED lamp bar are disposed on described printed circuit board (PCB) one by one.
8. backlight according to claim 5, is characterized in that, the reflecting surface of described the second micro-reflection structure be shaped as following any one: rectangle, circle, ellipse, triangle, arc.
9. a display unit, is characterized in that, comprises the backlight as described in as arbitrary in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420203499.1U CN203836857U (en) | 2014-04-24 | 2014-04-24 | Backlight source and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420203499.1U CN203836857U (en) | 2014-04-24 | 2014-04-24 | Backlight source and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836857U true CN203836857U (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420203499.1U Expired - Fee Related CN203836857U (en) | 2014-04-24 | 2014-04-24 | Backlight source and display device |
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| Country | Link |
|---|---|
| CN (1) | CN203836857U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108345060A (en) * | 2018-04-16 | 2018-07-31 | 昆山佰淇电子有限公司 | A kind of rectangle microdot optical diaphragm |
| CN115064069A (en) * | 2022-06-20 | 2022-09-16 | Tcl华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
-
2014
- 2014-04-24 CN CN201420203499.1U patent/CN203836857U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108345060A (en) * | 2018-04-16 | 2018-07-31 | 昆山佰淇电子有限公司 | A kind of rectangle microdot optical diaphragm |
| CN115064069A (en) * | 2022-06-20 | 2022-09-16 | Tcl华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
| CN115064069B (en) * | 2022-06-20 | 2023-12-08 | Tcl华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 |