CN104075187B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN104075187B CN104075187B CN201410273953.5A CN201410273953A CN104075187B CN 104075187 B CN104075187 B CN 104075187B CN 201410273953 A CN201410273953 A CN 201410273953A CN 104075187 B CN104075187 B CN 104075187B
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- guide plate
- limit
- backlight module
- light guide
- shading element
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Abstract
The backlight module of the present invention and display device, wherein, backlight module includes light guide plate and is arranged at the multiple spaced point source of side of light guide plate, light guide plate include for the front guide-lighting to panel and with the back side of vis-a-vis, the side, front of light guide plate is provided with the first shading element, first shading element organize dot structure towards being arranged at intervals with on the side in the front of light guide plate more, dot structure includes multiple unit spot, many group dot structures are the most relative with point source respectively, and the space between space and point source between dot structure is relative.The display device of the present invention, including the backlight module of the present invention.Technical scheme is by increasing the first shading element optionally absorbs or scatters, pip light source is stronger in emitting beam a part of light B region to light guide plate in backing structure, to reduce the a-quadrant on light guide plate and the light proportional difference in the B region on light guide plate, prevent the generation of luminous point phenomenon light and dark on light guide plate.
Description
Technical field
The present invention relates to a kind of control device from arbitrary source, particularly relate to a kind of backlight module and display dress
Put.
Background technology
Backlight module is one of significant components of liquid crystal display, owing to liquid crystal itself is the most luminous, and the function of backlight module
It is exactly well-off brightness and the light source being evenly distributed, makes the normal show image of liquid crystal display energy.At present, liquid crystal display
Display Technique tended to ripe, the especially design aspect at backlight module there has also been the biggest development.Backlight module except
Apply outside the liquid crystal indicator such as liquid crystal display, liquid crystal TV set, it is also possible to for DPF, Electronic Paper, mobile phone etc.
Display device provides light source.
Backlight module is divided into side entrance back module and down straight aphototropism mode set according to the position difference of light source.Wherein, mesh
In the side entrance back module of front use use black adhesive tape (positive and negative is all black) or black and white adhesive tape (front be black,
Reverse side is white) light before LED is carried out optical block, and the LED owing to currently using is similar to point source, the light of LED
The ray density in the space between density and LED is inconsistent, therefore light and dark hotspot (light can occur on light guide plate again
Point) phenomenon, simultaneously because LED light source constantly develops to high brightness, the amount of light in unit space gets more and more, and only passes through
What the site on light guide plate realized light is uniformly distributed the more and more difficult of change.
Summary of the invention
It is an object of the invention to provide the ray density in a kind of space that can overcome between point source and point source not
Unanimously, prevent from occurring on light guide plate backlight module and the display device of light and dark luminous point phenomenon.
The backlight module of the present invention, multiple spaced including light guide plate and the side being arranged at described light guide plate
Point source, described light guide plate include for the front guide-lighting to panel and with the back side of described vis-a-vis, described light guide plate
Side, front be provided with the first shading element, on the side towards the front of described light guide plate of described first shading element between
Organizing dot structure every being provided with, described dot structure includes multiple unit spot more, described many group dot structures respectively with described point source one
One relatively, and the space between described dot structure is relative with the space between described point source.
The backlight module of the present invention, wherein, described first shading element include near described point source the first limit and
Second limit relative with described first limit, many group dot structures are arranged in described first limit and institute along the orientation of described point source
State between the second limit.
The backlight module of the present invention, wherein, described dot structure is that be respectively positioned on described first shading element with described leaded light
In the region that plate is corresponding.
The backlight module of the present invention, wherein, the size of the multiple described unit spot often organizing dot structure is pointed to along by the first limit
Successively decrease in the direction on the second limit.
The backlight module of the present invention, wherein, the described unit spot arrangement often organizing dot structure is formed close to described first limit
Trapezoidal and taper with described trapezoidal close described second limit being connected, the vertex of a cone of described taper points to described second limit, institute
State trapezoidal minor face towards described first limit.
The backlight module of the present invention, wherein, often organizes the multiple described unit spot of dot structure along described first limit bearing of trend
Arrangement forms multiple cell queues, multiple cell queue equidistant arrangement, each described unit spot and two in described cell queue
Unit spot corresponding in the adjacent cells queue of side is on a straight line being perpendicular to described first limit, many in described cell queue
The size of individual described unit spot is successively decreased along the axis alignment lateral symmetry of described dot structure.
The backlight module of the present invention, wherein, the material of described first shading element is polyethylene terephthalate, institute
It is transparent for stating the first shading element, and the optical index of described first shading element is less than 1.5.
The backlight module of the present invention, wherein, described unit spot is black or white.
The backlight module of the present invention, wherein, described unit spot is rectangle, circle, ellipse, triangle or polygon.
The backlight module of the present invention, wherein, the first limit of described first shading element is positioned at the district that described point source is corresponding
In territory, the second limit of described first shading element is positioned at the region that described light guide plate is corresponding.
The backlight module of the present invention, wherein, the outside for the side towards panel of described first shading element is arranged
There is the second shading element.
The display device of the present invention, including the backlight module of the present invention.
Technical scheme, optionally absorbs by increasing by the first shading element in backing structure or dissipates
Penetrate, B region on a part of light that pip light source is stronger in emitting beam to light guide plate, to reduce the A district on light guide plate
The light proportional difference in the B region on territory and light guide plate, the light in the space between ray density and the point source of solution point source
The problem that line density is inconsistent, prevents the generation of luminous point phenomenon light and dark on light guide plate.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the backlight module of the present invention；
Fig. 2 is the structural representation of the another kind of embodiment of the backlight module of the present invention；
Fig. 3 be the present invention backlight module in the structural representation of the first shading element, also show the first shading unit
Position relationship between part and light guide plate, point source and interactively.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art is permissible
It is better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
The present invention, in existing backing structure, adds the first independent shading element, and the first shading element can realize
Selecting type shading (absorbs, scatters).
As shown in Figure 1, Figure 3, the embodiment of the backlight module of the present invention, including light guide plate 1 and be arranged at light guide plate 1
The multiple spaced point source 2 of side, light guide plate 1 includes for the front 10 guide-lighting to panel and relative with front 10
The back side 20, the side, front 10 of light guide plate is provided with the first shading element 3.First shading element 3 towards light guide plate just
Being arranged at intervals with many group dot structures 4 on the side in face 10, dot structure 4 includes multiple unit spot 5, many group dot structures 4 respectively with point
Light source 2 is relative one by one, and the space between dot structure 4 is relative with the space between point source 2.
In Fig. 1, the region A ray density of point source 2 correspondence is relatively big, and the space between point source 2 with point source 2 is corresponding
The ray density of region B is less, and by dot structure 4, the first shading element 3 can realize sending a-quadrant (LED goes out light front)
Some light carry out reflection, scatter to B region (region between LED and LED) or absorb, prevent backing structure from going out
Existing luminous points etc. are bad.
The embodiment of the backlight module of the present invention, wherein, the first shading element 3 includes the first limit 31 near point source 2
And second limit 32 relative with the first limit 31, many group dot structures 4 are arranged in the first limit 31 and the along the orientation of point source 2
Between two limits 32.
The embodiment of the backlight module of the present invention, wherein, dot structure 4 be respectively positioned on the first shading element 3 with light guide plate 1
In corresponding region, specifically, dot structure 4 is respectively positioned on the district relative with the front 10 of light guide plate 1 on the first shading element 3
In territory.
The embodiment of the backlight module of the present invention, wherein, often the size of multiple unit spot 5 of group dot structure 4 is along by first
Limit 31 is pointed to the direction on the second limit 32 and is successively decreased.
The embodiment of the backlight module of the present invention, wherein, often unit spot 5 arrangement of group dot structure 4 is formed close to the first limit
31 trapezoidal and with the trapezoidal taper near the second limit 32 being connected, the vertex of a cone of taper points to the second limit 32, trapezoidal minor face
Towards the first limit 31.
The embodiment of the backlight module of the present invention, wherein, often multiple unit spot 5 of group dot structure 4 extend along the first limit 31
Direction arrangement forms multiple cell queues 40, multiple cell queue 40 equidistant arrangement, each unit spot in cell queue 40 5 with
Unit spot 5 corresponding in the adjacent cells queue of both sides is on a straight line being perpendicular to the first limit 31, many in cell queue 40
The size of individual unit spot 5 is successively decreased along the axis alignment lateral symmetry of dot structure 4.
The embodiment of the backlight module of the present invention, wherein, the material of the first shading element 3 is polyethylene terephthalate
Ester, the first shading element is transparent, and the optical index of the first shading element 3 is less than 1.5.
The embodiment of the backlight module of the present invention, wherein, unit spot 5 is black or white.
The embodiment of the backlight module of the present invention, wherein, unit spot 5 is rectangle, circle, ellipse, triangle or polygon
Shape.
The embodiment of the backlight module of the present invention, wherein, it is corresponding that the first limit 31 of the first shading element 3 is positioned at point source 2
Region in, the second limit 32 of the first shading element is positioned at the region of light guide plate 1 correspondence.Specifically, the second limit 32 is positioned at
In the region relative with the front 10 of light guide plate 1.
The embodiment of the backlight module of the present invention, wherein, the first shading element 3 for setting outside the side of panel
It is equipped with the second shading element 6.For black adhesive tape (positive and negative is all black) or black and white adhesive tape, (front is black to second shading element 6
Color, reverse side are white).
The embodiment of the backlight module of the present invention, wherein, is provided with blooming between the first shading element 3 and light guide plate 1
Sheet 7, is provided with circuit board 9 between the first shading element 3 and point source 2, the back side of light guide plate 1 is provided with backboard 8.
As in figure 2 it is shown, in the another kind of embodiment of the backlight module of the present invention, the first shading element 3 is attached directly to lead
On tabula rasa 1.
The display device of the present invention, including the backlight module of the present invention.
The embodiment of the first shading element of the backlight module of the present invention, is transparent at low optical index (n < 1.5) PET etc.
Printing the ink material having reflection, scattering, absorb light function on material, such as resin adds pigment and adds diffusant, wherein
Pigment is SiO and TiO with reflection2。
First shading element of the backlight module of the present invention is arranged on before point source relative to the position needed, and passes through piconet
The part that dot structure 4 optionally absorbs or scatters, pip light source is stronger in emitting beam of point type is (on light guide plate
A-quadrant) light to the B region on light guide plate, the light ratio of the a-quadrant on light guide plate and the B region on light guide plate can be reduced
Example difference, it is possible to effectively reduce the incidence rate of the bad problems of optics such as luminous point in backing structure.
Technical scheme, carries out light path adjustment (to a-quadrant by increasing by the first shading element in backing structure
Interior unnecessary light carries out the reflection of partial selective, scatters to B region, it is achieved the purpose of uniform light distribution).
In the backlight module of the present invention, the size of the unit spot of the dot structure of the first shading element, Density Distribution, arrangement sequence
Row can be adjusted design according to the concrete form of backing structure.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a backlight module, including light guide plate and multiple spaced some light of the side being arranged at described light guide plate
Source, described light guide plate include for the front guide-lighting to panel and with the back side of described vis-a-vis, it is characterised in that described
The side, front of light guide plate is provided with the first shading element, the side in the front towards described light guide plate of described first shading element
Being arranged at intervals with on face and organize dot structure more, described dot structure includes multiple unit spot, described many group dot structures respectively with described point
Light source is relative one by one, and the space between described dot structure is relative with the space between described point source；
Described first shading element includes near the first limit of described point source and second limit relative with described first limit, many
Group dot structure is arranged between described first limit and described second limit along the orientation of described point source；
The size of the multiple described unit spot often organizing dot structure is successively decreased along the direction being pointed to the second limit by the first limit.
Backlight module the most according to claim 1, it is characterised in that described dot structure is respectively positioned on described first shading element
On the region corresponding with described light guide plate in.
Backlight module the most according to claim 1, it is characterised in that the described unit spot arrangement formation often organizing dot structure is leaned on
The most described first limit trapezoidal and the taper with described trapezoidal close described second limit being connected, the vertex of a cone of described taper points to
Described second limit, described trapezoidal minor face is towards described first limit.
Backlight module the most according to claim 3, it is characterised in that often organize the multiple described unit spot of dot structure along described
First limit bearing of trend arrangement forms multiple cell queues, multiple cell queue equidistant arrangement, each in described cell queue
The described unit spot unit spot corresponding with the adjacent cells queue of both sides is on a straight line being perpendicular to described first limit, described
The size of the multiple described unit spot in cell queue is successively decreased along the axis alignment lateral symmetry of described dot structure.
Backlight module the most according to claim 1, it is characterised in that the material of described first shading element is for gathering benzene two
Formic acid glycol ester, described first shading element is transparent, and the optical index of described first shading element is less than 1.5.
Backlight module the most according to claim 1, it is characterised in that described unit spot is black or white.
Backlight module the most according to claim 1, it is characterised in that described unit spot be rectangle, circle, ellipse, three
Dihedral or polygon.
Backlight module the most according to claim 1, it is characterised in that the first limit of described first shading element is positioned at described
In the region that point source is corresponding, the second limit of described first shading element is positioned at the region that described light guide plate is corresponding.
Backlight module the most according to claim 1, it is characterised in that being used for towards panel of described first shading element
The outside of side is provided with the second shading element.
10. a display device, it is characterised in that include the backlight module as described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410273953.5A CN104075187B (en) | 2014-06-18 | 2014-06-18 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410273953.5A CN104075187B (en) | 2014-06-18 | 2014-06-18 | Backlight module and display device |
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| Publication Number | Publication Date |
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| CN104075187A CN104075187A (en) | 2014-10-01 |
| CN104075187B true CN104075187B (en) | 2017-01-04 |
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| CN201410273953.5A Active CN104075187B (en) | 2014-06-18 | 2014-06-18 | Backlight module and display device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105700230B (en) * | 2016-01-29 | 2018-11-20 | 京东方科技集团股份有限公司 | Backlight, backlight module and display device |
| CN105807492A (en) * | 2016-05-24 | 2016-07-27 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN106801823B (en) * | 2017-01-20 | 2019-03-26 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN107340648B (en) * | 2017-09-07 | 2020-08-18 | 京东方科技集团股份有限公司 | Back plate structure, backlight module, display device and manufacturing method of back plate structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7185995B2 (en) * | 2003-09-19 | 2007-03-06 | Sony Corporation | Backlight device and liquid crystal display |
| CN101479525B (en) * | 2006-10-27 | 2012-02-08 | 夏普株式会社 | Illuminating device and liquid crystal display |
| JP5507821B2 (en) * | 2008-08-28 | 2014-05-28 | フューチャー ライト リミテッド ライアビリティ カンパニー | Light emitting device |
| EP2470947B1 (en) * | 2009-08-27 | 2016-03-30 | LG Electronics Inc. | Optical assembly, backlight unit and display apparatus thereof |
| TWI484264B (en) * | 2011-05-04 | 2015-05-11 | Ultra - thin front light module | |
| CN203178514U (en) * | 2013-04-07 | 2013-09-04 | 三普龙光电材料股份有限公司 | Light guide plate structure |
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