CN104075187A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN104075187A CN104075187A CN201410273953.5A CN201410273953A CN104075187A CN 104075187 A CN104075187 A CN 104075187A CN 201410273953 A CN201410273953 A CN 201410273953A CN 104075187 A CN104075187 A CN 104075187A
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- backlight module
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- shading element
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Abstract
The invention relates to a backlight module and a display device. The backlight module comprises a light guide plate and a plurality of point light sources arranged on one side of the light guide plate at intervals. The light guide plate comprises a front for guiding light to a panel and a back opposite to the front, a first light shading element is arranged on one side of the front of the light guide plate, a plurality of groups of point structures are arranged on the side of the first light shading element facing the front of the light guide plate at intervals, the point structures comprise a plurality of unit points, the plurality of groups of point structures are respective opposite to the point light sources one to one, and gaps between the point structures are opposite to gaps between the point light sources. The display device comprises the backlight module. According to the technical scheme, the first light shading element is increased in the backlight structure to selectively absorb or scatter and reflect part of strong light in light emitted by the point light sources to a B area of the light guide plate, so as to reduce light proportion difference between an A area of the light guide plate and the B area of the light guide plate and avoid light and shade alternating light spots on the light guide plate.
Description
Technical field
The present invention relates to a kind of control from the device of arbitrary source, particularly relate to a kind of backlight module and display unit.
Background technology
Backlight module is one of significant components of liquid crystal display, and because liquid crystal itself is not luminous, the function of backlight module is exactly well-off brightness and the light source being evenly distributed, and makes normally show image of liquid crystal display.At present, it is ripe that the Display Technique of liquid crystal display has been tending towards, and especially the design aspect at backlight module also has a great development.Backlight module, except being applied in the liquid crystal indicators such as liquid crystal display, liquid crystal TV set, can also provide light source for display unit such as DPF, Electronic Paper, mobile phones.
Backlight module is divided into side entrance back module and down straight aphototropism mode set according to the position difference of light source.Wherein, in the side entrance back module using at present, (front is black for many use black adhesive tapes (positive and negative is all black) or black and white adhesive tape, reverse side is white) light before LED is carried out to optics block, and due to the similar spot light of LED using now, the ray density of LED and the ray density in the space between LED are inconsistent, therefore on LGP, there is light and dark hotspot (luminous point) phenomenon again, simultaneously because LED light source constantly develops to high brightness, amount of light in unit space is more and more, that only by the site on LGP, realizes light is uniformly distributed the more and more difficult of change.
Summary of the invention
The object of the present invention is to provide a kind of ray density that can overcome the space between spot light and spot light inconsistent, prevent from occurring on LGP backlight module and the display unit of light and dark luminous point phenomenon.
Backlight module of the present invention, a plurality of spaced spot light that comprises LGP and be arranged at a side of described LGP, described LGP comprise for to the positive of panel leaded light and with the back side of described vis-a-vis, front one side of described LGP is provided with the first shading element, described the first shading element towards being arranged at intervals with many group dot structures on the positive side of described LGP, described dot structure comprises a plurality of unit spot, described many group dot structures are relative one by one with described spot light respectively, space between described dot structure is relative with the space between described spot light.
Backlight module of the present invention, wherein, described the first shading element comprises near the first side of described spot light and the Second Edge relative with described first side, organizes dot structure more and is arranged between described first side and described Second Edge along the orientation of described spot light.
Backlight module of the present invention, wherein, described dot structure is all positioned at the region corresponding with described LGP on described the first shading element.
Backlight module of the present invention, wherein, the size of a plurality of described unit spot of every group of dot structure is successively decreased along the direction of being pointed to Second Edge by first side.
Backlight module of the present invention, wherein, the described unit spot of every group of dot structure arrange form near the trapezoidal of described first side and with the taper of the described trapezoidal close described Second Edge being connected, the vertex of a cone of described taper points to described Second Edge, described trapezoidal minor face is towards described first side.
Backlight module of the present invention, wherein, a plurality of described unit spot of every group of dot structure is arranged and is formed a plurality of cell queues along described first side bearing of trend, a plurality of cell queues are equidistantly arranged, described in each in described cell queue, unit spot is with unit spot corresponding in the adjacent cells queue of both sides on a straight line perpendicular to described first side, and the size of a plurality of described unit spot in described cell queue is successively decreased to bilateral symmetry along the axis of described dot structure.
Backlight module of the present invention, wherein, the material of described the first shading element is PETG, and described the first shading element is transparent, and the optical index of described the first shading element is less than 1.5.
Backlight module of the present invention, wherein, described unit spot is black or white.
Backlight module of the present invention, wherein, described unit spot is rectangle, circle, ellipse, triangle or polygon.
Backlight module of the present invention, wherein, the first side of described the first shading element is positioned at the region that described spot light is corresponding, and the Second Edge of described the first shading element is positioned at the region that described LGP is corresponding.
Backlight module of the present invention, wherein, the arranged outside for the side towards panel of described the first shading element has the second shading element.
Display unit of the present invention, comprises backlight module of the present invention.
Technical scheme of the present invention, by in backing structure, increase optionally absorption or the scattering of the first shading element, pip light source in emitting beam stronger a part of light to the B region on LGP, with the a-quadrant on reduction LGP and the light proportional difference in the B region on LGP, solve the ray density of spot light and the inconsistent problem of ray density in the space between spot light, prevent the generation of luminous point phenomenon light and dark on LGP.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of backlight module of the present invention;
Fig. 2 is the structural representation of the another kind of embodiment of backlight module of the present invention;
Fig. 3 is the structural representation of the first shading element in backlight module of the present invention, shows position relationship and interactively between the first shading element and LGP, spot light simultaneously.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, can be implemented, but illustrated embodiment is not as a limitation of the invention so that those skilled in the art can better understand the present invention also.
The present invention, in existing backing structure, has increased independently the first shading element, and the first shading element can be realized selecting type shading (absorption, scattering).
As shown in Figure 1, Figure 3, the embodiment of backlight module of the present invention, a plurality of spaced spot light 2 that comprises LGP 1 and be arranged at a side of LGP 1, LGP 1 comprises that front 10 1 sides of LGP are provided with the first shading element 3 for the front 10 to panel leaded light and the back side 20 relative with front 10.On the side in the front 10 towards LGP of the first shading element 3, be arranged at intervals with many group dot structures 4, dot structure 4 comprises a plurality of unit spot 5, many group dot structures 4 are relative one by one with spot light 2 respectively, and the space between dot structure 4 is relative with the space between spot light 2.
In Fig. 1, the region A ray density of spot light 2 correspondences is larger, the ray density of the region B that spot light 2 is corresponding with space between spot light 2 is less, by dot structure 4, the first shading element 3 can be realized reflection that part light that a-quadrant (LED bright dipping positive) sent carries out, scatters to B region (region between LED and LED) or absorb, and prevents that backing structure from occurring that luminous point etc. is bad.
The embodiment of backlight module of the present invention, wherein, the first shading element 3 comprises near the first side 31 of spot light 2 and the Second Edge 32 relative with first side 31, organizes dot structure 4 more and is arranged between first side 31 and Second Edge 32 along the orientation of spot light 2.
The embodiment of backlight module of the present invention, wherein, dot structure 4 is all positioned at the region corresponding with LGP 1 on the first shading element 3, and specifically, dot structure 4 is all positioned at the region relative with the front 10 of LGP 1 on the first shading element 3.
The embodiment of backlight module of the present invention, wherein, the size of a plurality of unit spot 5 of every group of dot structure 4 is successively decreased along the direction of pointing to Second Edge 32 by first side 31.
The embodiment of backlight module of the present invention, wherein, the unit spot of every group of dot structure 45 arrange form near the trapezoidal of first side 31 and with the taper of trapezoidal close the Second Edge 32 being connected, the vertex of a cone sensing Second Edge 32 of taper, trapezoidal minor face is towards first side 31.
The embodiment of backlight module of the present invention, wherein, a plurality of unit spot 5 of every group of dot structure 4 are arranged and are formed a plurality of cell queues 40 along first side 31 bearing of trends, a plurality of cell queues 40 are equidistantly arranged, each unit spot 5 in cell queue 40 is with unit spot 5 corresponding in the adjacent cells queue of both sides on a straight line perpendicular to first side 31, and the size of a plurality of unit spot 5 in cell queue 40 is successively decreased to bilateral symmetry along the axis of dot structure 4.
The embodiment of backlight module of the present invention, wherein, the material of the first shading element 3 is PETG, and the first shading element is transparent, and the optical index of the first shading element 3 is less than 1.5.
The embodiment of backlight module of the present invention, wherein, unit spot 5 is black or white.
The embodiment of backlight module of the present invention, wherein, unit spot 5 is rectangle, circle, ellipse, triangle or polygon.
The embodiment of backlight module of the present invention, wherein, the first side 31 of the first shading element 3 is positioned at the region of spot light 2 correspondences, and the Second Edge 32 of the first shading element is positioned at the region of LGP 1 correspondence.Specifically, Second Edge 32 is positioned at the region relative with the front 10 of LGP 1.
The embodiment of backlight module of the present invention, wherein, the side arranged outside for towards panel of the first shading element 3 has the second shading element 6.The second shading element 6 is black adhesive tape (positive and negative is all black) or black and white adhesive tape (front is that black, reverse side are white).
The embodiment of backlight module of the present invention, wherein, is provided with between the first shading element 3 and LGP 1 between blooming piece 7, the first shading elements 3 and spot light 2 and is provided with circuit board 9, and the back side of LGP 1 is provided with backboard 8.
As shown in Figure 2, in the another kind of embodiment of backlight module of the present invention, the first shading element 3 is directly attached on LGP 1.
Display unit of the present invention, comprises backlight module of the present invention.
The embodiment of the first shading element of backlight module of the present invention, be on the transparent materials such as low optical index (n<1.5) PET, print there is reflection, the ink material of scattering, absorption light function, for example resin adds pigment and adds diffusant, and wherein pigment is SiO and the TiO with reflex
2.
The first shading element of backlight module of the present invention is arranged on the position relatively needing before spot light, optionally absorption or the scattering of dot structure 4 by piconet point type, pip light source in emitting beam a stronger part (a-quadrant on LGP) light to the B region on LGP, a-quadrant on LGP and the light proportional difference in the B region on LGP can be reduced, the incidence of the bad problem of optics such as luminous point in backing structure can be effectively reduced.
Technical scheme of the present invention, carries out light path adjustment (the unnecessary light in a-quadrant is carried out to part and optionally reflect, scatter to B region, realize the equally distributed object of light) by increase by the first shading element in backing structure.
In backlight module of the present invention, the size of the unit spot of the dot structure of the first shading element, Density Distribution, collating sequence can carry out adjusted design according to the concrete form of backing structure.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a backlight module, a plurality of spaced spot light that comprises LGP and be arranged at a side of described LGP, described LGP comprise for to the positive of panel leaded light and with the back side of described vis-a-vis, it is characterized in that, front one side of described LGP is provided with the first shading element, described the first shading element towards being arranged at intervals with many group dot structures on the positive side of described LGP, described dot structure comprises a plurality of unit spot, described many group dot structures are relative one by one with described spot light respectively, space between described dot structure is relative with the space between described spot light.
2. backlight module according to claim 1, it is characterized in that, described the first shading element comprises near the first side of described spot light and the Second Edge relative with described first side, organizes dot structure more and is arranged between described first side and described Second Edge along the orientation of described spot light.
3. backlight module according to claim 1, is characterized in that, described dot structure is all positioned at the region corresponding with described LGP on described the first shading element.
4. backlight module according to claim 2, is characterized in that, the size of a plurality of described unit spot of every group of dot structure is successively decreased along the direction of being pointed to Second Edge by first side.
5. backlight module according to claim 2, it is characterized in that, the described unit spot of every group of dot structure arrange form near the trapezoidal of described first side and with the taper of the described trapezoidal close described Second Edge being connected, the vertex of a cone of described taper points to described Second Edge, and described trapezoidal minor face is towards described first side.
6. backlight module according to claim 5, it is characterized in that, a plurality of described unit spot of every group of dot structure is arranged and is formed a plurality of cell queues along described first side bearing of trend, a plurality of cell queues are equidistantly arranged, described in each in described cell queue, unit spot is with unit spot corresponding in the adjacent cells queue of both sides on a straight line perpendicular to described first side, and the size of a plurality of described unit spot in described cell queue is successively decreased to bilateral symmetry along the axis of described dot structure.
7. backlight module according to claim 1, is characterized in that, the material of described the first shading element is PETG, and described the first shading element is transparent, and the optical index of described the first shading element is less than 1.5.
8. backlight module according to claim 1, is characterized in that, described unit spot is black or white.
9. backlight module according to claim 1, is characterized in that, described unit spot is rectangle, circle, ellipse, triangle or polygon.
10. backlight module according to claim 2, is characterized in that, the first side of described the first shading element is positioned at the region that described spot light is corresponding, and the Second Edge of described the first shading element is positioned at the region that described LGP is corresponding.
11. backlight modules according to claim 1, is characterized in that, the arranged outside for the side towards panel of described the first shading element has the second shading element.
12. 1 kinds of display unit, is characterized in that, comprise the backlight module as described in claim 1-11 any one.
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 true CN104075187A (en) | 2014-10-01 |
| CN104075187B 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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| CN105700230A (en) * | 2016-01-29 | 2016-06-22 | 京东方科技集团股份有限公司 | Backlight source, 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 |
| CN106801823A (en) * | 2017-01-20 | 2017-06-06 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN107340648A (en) * | 2017-09-07 | 2017-11-10 | 京东方科技集团股份有限公司 | Back board structure, backlight module, the preparation method of display device and back board structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105700230A (en) * | 2016-01-29 | 2016-06-22 | 京东方科技集团股份有限公司 | Backlight source, backlight module and display device |
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| CN107340648A (en) * | 2017-09-07 | 2017-11-10 | 京东方科技集团股份有限公司 | Back board structure, backlight module, the preparation method of display device and back board structure |
| 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 |
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| CN104075187B (en) | 2017-01-04 |
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